CN219319040U - System for sintering, activating and cooling coal gangue - Google Patents
System for sintering, activating and cooling coal gangue Download PDFInfo
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- CN219319040U CN219319040U CN202223268028.2U CN202223268028U CN219319040U CN 219319040 U CN219319040 U CN 219319040U CN 202223268028 U CN202223268028 U CN 202223268028U CN 219319040 U CN219319040 U CN 219319040U
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Abstract
The utility model discloses a system for sintering, activating and cooling coal gangue, which comprises a sintering and activating device and a cooling device; the sintering activation device is a belt type sintering machine; the cooling device comprises a shaft furnace body, and further comprises a receiving mechanism, a cooling mechanism and a discharging mechanism which are sequentially arranged from top to bottom; the material receiving mechanism comprises a storage tank and a vibration feeder; the storage tank is arranged above the vibrating feeder, and a trough is arranged at the bottom end of the vibrating feeder; the head end of the trough is connected with the storage tank, and the tail end of the trough is communicated with the shaft furnace body; a baffle is arranged at the tail end of the trough; the discharge end of the belt sintering machine is connected with the feed end of the storage tank through a feed device. The utility model adopts a step cooling mode, the first cooling stage adopts cold air to cool rapidly, the activity of the coal gangue can be improved, and the second cooling stage adopts normal-temperature air to cool, the burden of a fan can be effectively reduced, and the cost is saved.
Description
Technical Field
The utility model belongs to the field of solid waste comprehensive utilization equipment, and particularly relates to a system for sintering, activating and cooling coal gangue.
Background
China is the largest coal producing country in the world, and a large amount of coal gangue can be produced in the coal exploitation and production process. The production amount of the gangue in China is about 10% -15% of the coal yield, the accumulated stacking amount of the gangue is about 70 hundred million tons, and the gangue is formed to be more than 2600 seat and occupy about 22 ten thousand hectares. The mass production, discharge and stockpiling of the gangue bring a plurality of environmental problems and potential safety hazards. The main chemical component of the gangue is SiO 2 、Al 2 O 3 Can be used as building material. The building material market capacity is large, and if the gangue is activated to prepare building materials such as cement mixed materials, the resource utilization of the gangue can be realized, and the environmental problems caused by the gangue can be relieved. The method for activating the coal gangue mainly comprises thermal activation, chemical activation, mechanical activation, microwave activation and the like, but compared with other methods, the thermal activation has the characteristics of easy operation and large consumption, and can effectively reduce carbon residue, organic matters, sulfur content and the like in the coal gangue, thereby improving the performance of cement.
Chinese patent CN113790601a discloses an intelligent activating device for coal gangue, which adopts microwaves to activate the coal gangue. The device is clean and safe, but the microwave oven has huge cost and is difficult to be large-sized and industrialized. Chinese patent CN113108602a discloses a novel activation calcining kiln for gangue, which can effectively activate gangue with low calorific value, but the kiln is easy to be formed due to overhigh temperature, and the yield is low.
In summary, the disclosed related gangue activating devices can activate the gangue, but have the disadvantages of higher cost, low activating efficiency and lower yield, and are difficult to realize the bulk consumption of the gangue. After the coal gangue is thermally activated, a belt type or annular cooler is adopted for cooling, and the belt type or annular cooler has the advantages of high air leakage rate, low cooling efficiency, low waste heat recovery rate and high failure rate.
Based on this, the application proposes a system for gangue sintering activation, cooling.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a system for sintering, activating and cooling coal gangue.
The utility model provides a system for sintering, activating and cooling coal gangue, which comprises a sintering and activating device and a cooling device;
the sintering activation device is a belt type sintering machine;
the cooling device comprises a shaft furnace body, and further comprises a receiving mechanism, a cooling mechanism and a discharging mechanism which are sequentially arranged from top to bottom;
the material receiving mechanism comprises a storage tank and a vibration feeder; the storage tank is arranged above the vibrating feeder and used for feeding materials from the upper part of the vibrating feeder, and a trough is arranged at the bottom end of the vibrating feeder; the head end of the trough is connected with the storage tank, and the tail end of the trough is communicated with the shaft furnace body;
a baffle is arranged at the tail end of the trough;
the discharge end of the belt sintering machine is connected with the feed end of the storage tank through a feed device.
Preferably, the height of the baffle plate is 3-8 cm. The baffle is arranged to form a dead material layer above the material groove, so that the material groove is prevented from being thermally shocked by the hot sintered material which is stored in the storage tank; on the other hand, the sintered material and the dead material layer on the trough are rubbed with each other, so that mechanical loss is caused, and the ageing damage of equipment is reduced. If the height of the baffle exceeds 8cm, the blanking is blocked and is not smooth; if the height of the baffle is less than 3cm, a stable dead material layer with a certain thickness cannot be formed, so that the protection effect is poor.
Preferably, the cooling mechanism adopts a step-by-step cooling mode, and comprises a primary cooling unit and a secondary cooling unit from top to bottom in sequence;
the first-stage cooling unit and the second-stage cooling unit have the same structure;
the primary cooling unit comprises two groups of central hoods which are arranged up and down along the height direction, and each group of central hoods is provided with an air outlet;
the primary cooling unit further comprises two fans which are symmetrically arranged on two sides of the shaft furnace body, each fan is connected with three cold air pipes, and an air inlet regulating valve is arranged at the joint of each fan and each three cold air pipes;
wherein, two cold air pipes are connected with the two groups of central hoods; the other cold air pipe is arranged on the side surface of the shaft furnace body, and the side surface of the shaft furnace body is provided with a corresponding air outlet.
More preferably, the air supply system of the primary cooling unit is a dry-cooling air blower, and performs first-stage cooling on the entered coal gangue sintering material, and rapidly cools and forms high-temperature waste gas; and the air supply system of the secondary cooling unit is a normal-temperature air blower, and performs secondary cooling on the entered coal gangue sintering material to form low-temperature waste gas.
More preferably, an inverted cone is arranged between the central hood and the shaft furnace body, so that the collection and cooling of the coal gangue sintering material are facilitated.
More preferably, the central hood is fixedly mounted on the cold air pipe.
Preferably, the discharging mechanism comprises a disc discharging machine, the disc discharging machine is arranged at the bottom of the shaft furnace body, and the cooled coal gangue sintered material is discharged through the disc discharging machine and conveyed to the next working procedure by using a belt.
Preferably, the lower part of the shaft furnace body is cylindrical, and the upper part is conical; the shell of the furnace body is welded by steel plates, and the lining of the furnace body is made of refractory materials.
Preferably, the upper part of the shaft furnace body is provided with an exhaust port, and the exhaust port is connected with the dust removing unit and the waste heat utilizing unit through pipelines.
Preferably, the strand sintering machine is conventional mature equipment and comprises a material distribution area, an ignition area, a heat preservation area, a coal gangue sintering area and a crushing area.
The working principle of the utility model is as follows:
1. sintering and activating: the trolley of the strand sintering machine is pushed by the head chain wheel to advance on the track through the wheels; firstly, paving a layer of bedding material on a grate bar of a trolley through a material distribution area, and then distributing coal gangue raw materials, wherein the material distribution area consists of a shuttle type distributor, a round roller distributor and a reflecting plate; the ignition furnace of the ignition area adopts flame generated by gas fuel to continuously ignite the coal gangue; the combustion belt moves from top to bottom along the height direction of the material layer under the action of negative pressure generated by downward air draft of an air box below the material layer, so as to sinter the material layer; the trolley is enabled to just run to the tail part of the sintering machine when the sintering is finished by controlling the moving speed of the trolley; the trolley wheels are turned over under the pushing of the tail chain wheel, the coal gangue sintered material is discharged, a single-roller crusher is adopted for crushing, and then the sintered material enters a cooling unit for cooling; the empty trolley after the unloading is inversely hung on the descending track, and is pushed by the rear trolley to move towards the feeding end, so that the continuous production is realized.
2. The cooling process comprises the following steps: feeding the hot sintering material prepared by the strand sintering machine into a storage tank through a feeding device; the trough of the vibration feeder is connected with the storage tank, the tail end of the trough is provided with a baffle plate to reduce the thermal shock of the hot sintering material to the equipment, and the other end of the vibration feeder is connected with the cooling mechanism; the cooling mechanism adopts a gradual grading cooling mode to fully cool the sintering material, and comprises a primary cooling unit and a secondary cooling unit; the coal gangue sintered material moves from top to bottom, and the cooling medium moves from bottom to top, so that the coal gangue sintered material and the cooling medium relatively flow reversely; the primary cooling unit is dry-cold blast air, and the temperature of the blast air is 5-35 ℃ to rapidly cool the sintering material to form high-temperature waste gas; the secondary cooling unit is a normal-temperature air blast, and the coal gangue sintered material after primary cooling is subjected to secondary cooling to form low-temperature waste gas; the cooled waste gas is sent to a waste heat unit through an exhaust port for waste heat utilization; the discharging mechanism is mainly a disc discharging machine, the lower part of the shaft furnace body is cylindrical, and the upper part is conical; the shell of the furnace body is welded by steel plates, and the lining of the furnace body is made of refractory materials.
The utility model has the following beneficial technical effects:
the utility model adopts the belt sintering machine to thermally activate the gangue, can carry out continuous production, has the yield far greater than kiln equipment, and can realize the bulk digestion of the gangue. The utility model adopts the shaft furnace cooler to cool, the air leakage rate is reduced, and the hot waste gas is effectively recovered. By adopting a step cooling mode, cold air is adopted for rapid cooling in the first cooling stage, the activity of coal gangue can be improved, and normal-temperature air cooling is adopted for the second cooling stage, so that the burden of a fan can be effectively reduced, and the cost is saved. The chute part of the vibration feeder is skillfully provided with a baffle plate with the height of 3-8 cm, so that the thermal shock of hot sintering materials to equipment can be avoided, and the sintering materials and the chute are rubbed with each other to cause mechanical loss.
Drawings
Fig. 1 is a schematic diagram of the device connection of the present utility model.
Fig. 2 is a schematic structural view of a cooling device in the present utility model.
Fig. 3 is a schematic diagram of a baffle plate of a trough of a vibratory feeder according to the present utility model.
In the figure, 101-a bedding material feeding device; 102-a raw material feeding device; 103-ignition device; 104-a strand sintering machine framework; 105-trolley; 106-bellows; 107-driving means; 108-a dust removal device; 109-single roll crusher;
201-a shaft furnace body; 202-a storage tank; 203-a vibratory feeder; 204-trough; 205-baffle; 206-a central hood; 207-an air outlet; 208-fans; 209-a cold air pipe; 210-an air inlet regulating valve; 211-an inverted cone; 212-a disc discharger; 213-belt; 214-an exhaust port;
3-feeding device.
Detailed Description
The utility model is further described below in connection with the following examples which are provided for the purpose of better understanding of the present utility model and are, therefore, not to be construed as limiting the scope of the utility model.
The utility model will be further described with reference to specific examples and figures.
Example 1
As shown in fig. 1-3, a system for sintering, activating and cooling coal gangue comprises a strand sintering machine and a cooling device;
the strand sintering machine comprises a bedding material feeding device 101, a raw material feeding device 102, an ignition device 103, a strand sintering machine framework 104, a trolley 105, a bellows 106, a driving device 107, a dust removing device 108 and a single-roller crusher 109;
the cooling device comprises a shaft furnace body 201, and further comprises a receiving mechanism, a cooling mechanism and a discharging mechanism which are sequentially arranged from top to bottom;
the receiving mechanism comprises a storage tank 202 and a vibration feeder 203; the storage tank 202 is arranged above the vibration feeder 203 and is used for feeding materials from the upper part of the vibration feeder, and a trough 204 is arranged at the bottom end of the vibration feeder; the head end of the trough 204 is connected with a storage tank, and the tail end of the trough is communicated with the shaft furnace body 201; a baffle 205 is arranged at the tail end of the trough;
the discharge end of the strand sintering machine is connected with the feed end of the storage tank 202 through the feed device 3.
The height of the baffle plate is 5cm. The baffle is arranged to form a dead material layer above the material groove, so that the material groove is prevented from being thermally shocked by the hot sintered material which is stored in the storage tank; on the other hand, the sintered material and the dead material layer on the trough are rubbed with each other, so that mechanical loss is caused, and the ageing damage of equipment is reduced. If the height of the baffle exceeds 8cm, the blanking is blocked and is not smooth; if the height of the baffle is less than 3cm, a stable dead material layer with a certain thickness cannot be formed, so that the protection effect is poor.
The cooling mechanism adopts a step-by-step cooling mode, and comprises a primary cooling unit and a secondary cooling unit from top to bottom in sequence; the first-stage cooling unit and the second-stage cooling unit have the same structure;
the primary cooling unit comprises two groups of central hoods 206, the central hoods are arranged up and down along the height direction, and an air outlet 207 is arranged on each group of central hoods;
the primary cooling unit further comprises two fans 208, the fans are symmetrically arranged on two sides of the shaft furnace body, each fan is connected with three cold air pipes 209, and an air inlet regulating valve 210 is arranged at the joint of each fan and each cold air pipe; the central hood 206 is fixedly arranged on the cold air pipe 209;
wherein, two cold air pipes 209 are connected with two groups of central hoods 206; the other cold air pipe is arranged on the side surface of the shaft furnace body 201, and the side surface of the shaft furnace body is provided with a corresponding air outlet 207.
The air supply system of the primary cooling unit is a dry-cooling air blower, and performs first-stage cooling on the entered coal gangue sintering material, and rapidly cools and forms high-temperature waste gas; the air supply system of the secondary cooling unit is a normal-temperature air blower, and the secondary cooling is carried out on the entered coal gangue sintering material to form low-temperature waste gas.
An inverted cone 211 is arranged between the central hood 206 and the shaft furnace body 201, so that the collection and cooling of the coal gangue sinter are facilitated.
The discharging mechanism comprises a disc discharging machine 212, the disc discharging machine is arranged at the bottom of the shaft furnace body, and cooled gangue sintered materials are discharged through the disc discharging machine and transported to the next working procedure by a belt 213.
The lower part of the shaft furnace body 201 is cylindrical, and the upper part is conical; the shell of the furnace body is welded by steel plates, and the lining of the furnace body is made of refractory materials.
The upper part of the shaft furnace body is provided with an exhaust port 214 which is connected with the dust removing unit and the waste heat utilizing unit through pipelines.
The working process of the utility model comprises the following steps:
as shown in fig. 1, in use, the driving device 107 drives the trolley 105 forward. When the material is moved to the material distribution area, the bed charge feeder 101 spreads the sintered material having a particle size of 10 to 20mm on the grate bars of the pallet 105 as a bed charge, and the thickness of the bed charge is 30mm. The raw material feeding device 102 evenly distributes the coal gangue on the bedding material. The ignition device 103 sprays flame to the surface of the coal gangue for ignition, and proper heat preservation is carried out after ignition so as to reduce the cooling speed of the surface layer of the coal gangue and improve the production quality of the activated coal gangue. The driving device 107 continues to drive the trolley 105 to advance on the track. From the beginning of ignition to the end of sintering, the bellows 106 under the trolley continuously draws air from the sintering material, and the combustion belt moves from top to bottom along the height direction of the material layer under the action of negative pressure generated by air suction, so as to sinter the material layer. When the combustion belt reaches the bottom material layer, the temperature of sintering flue gas in the corresponding bellows reaches the highest, and the sintering reaches the end point. By controlling the moving speed of the trolley 105, the trolley just runs to the tail of the sintering machine when the sintering is finished. The trolley 105 is turned over to discharge, and the hot gangue is crushed by the single-roll crusher 109, and the crushed hot sintered material enters a shaft furnace cooler through the feeding device 3 to be cooled. And the empty trolley 105 after unloading is hung on a descending track and moves towards a feeding end to carry out the next round of sintering.
The crushed high-temperature sintered material enters a storage tank 202 in a receiving area of the shaft furnace cooler and is sent into the shaft furnace cooler for step cooling through a vibration feeder 203. The high-temperature gangue sintered material freely falls down to form a conical material pile in the primary cooling area for rapid cooling. The primary air supply fan 208 sends cold air into the primary cooling area through the primary air cooling pipe 209, the cold air is blown to the conical material pile through three air outlets 207 corresponding to the primary cooling area, and the temperature of the hot sintering material subjected to primary cooling is lower than 400 ℃. Cold air is changed into high-temperature waste gas after being blown through the material pile, and is led to waste heat utilization equipment for waste heat utilization. The sintered material cooled by the primary cooling zone enters the secondary cooling zone by self weight for cooling, and the secondary air supply fan 208 sends normal-temperature air into the secondary cooling zone through the secondary cooling air pipe 209, and the normal-temperature air is blown to the conical material pile through three air outlets 207 corresponding to the secondary cooling zone. The temperature of the coal gangue sintering material after the secondary cooling is lower than 50 ℃, and low-temperature waste gas formed after normal-temperature air is blown out through a material pile is sent to waste heat utilization equipment for low-temperature waste heat utilization. The cooled coal gangue sintered material enters a disc discharger 212 for discharging, and meanwhile, the next batch of high-temperature coal gangue sintered material enters a shaft furnace cooler, so that continuous cooling production of the hot coal gangue sintered material is realized.
Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A system for sintering, activating and cooling coal gangue, which is characterized by comprising a sintering and activating device and a cooling device;
the sintering activation device is a belt type sintering machine;
the cooling device comprises a shaft furnace body, and further comprises a receiving mechanism, a cooling mechanism and a discharging mechanism which are sequentially arranged from top to bottom;
the material receiving mechanism comprises a storage tank and a vibration feeder; the storage tank is arranged above the vibrating feeder and used for feeding materials from the upper part of the vibrating feeder, and a trough is arranged at the bottom end of the vibrating feeder; the head end of the trough is connected with the storage tank, and the tail end of the trough is communicated with the shaft furnace body;
a baffle is arranged at the tail end of the trough;
the discharge end of the belt sintering machine is connected with the feed end of the storage tank through a feed device.
2. The system for sintering, activating and cooling coal gangue as claimed in claim 1, wherein the height of the baffle plate is 3-8 cm.
3. The system for sintering, activating and cooling the coal gangue, as claimed in claim 1, wherein the cooling mechanism adopts a step-by-step cooling mode, and comprises a primary cooling unit and a secondary cooling unit from top to bottom in sequence;
the first-stage cooling unit and the second-stage cooling unit have the same structure;
the primary cooling unit comprises two groups of central hoods which are arranged up and down along the height direction, and each group of central hoods is provided with an air outlet;
the primary cooling unit further comprises two fans which are symmetrically arranged on two sides of the shaft furnace body, each fan is connected with three cold air pipes, and an air inlet regulating valve is arranged at the joint of each fan and each three cold air pipes;
wherein, two cold air pipes are connected with the two groups of central hoods; the other cold air pipe is arranged on the side surface of the shaft furnace body, and the side surface of the shaft furnace body is provided with a corresponding air outlet.
4. The system for sintering, activating and cooling coal gangue as claimed in claim 3, wherein the air supply system of the primary cooling unit is a dry-cooling blower, and the entering coal gangue sinter is subjected to first-stage cooling, rapid cooling and high-temperature exhaust gas is formed; and the air supply system of the secondary cooling unit is a normal-temperature air blower, and performs secondary cooling on the entered coal gangue sintering material to form low-temperature waste gas.
5. The system for sintering, activating and cooling coal gangue as claimed in claim 3, wherein an inverted cone is arranged between the central hood and the shaft furnace body, so that the collection and cooling of coal gangue sintering materials are facilitated.
6. A system for gangue sintering activation and cooling as claimed in claim 3 wherein the central hood is fixedly mounted on the cold air duct.
7. The system for sintering, activating and cooling coal gangue as claimed in claim 1, wherein the discharging mechanism comprises a disc discharger which is arranged at the bottom of the shaft furnace body, and the cooled coal gangue sintered material is discharged through the disc discharger and transported to the next process by a belt.
8. The system for sintering activation and cooling of coal gangue as claimed in claim 1, wherein the lower part of said shaft furnace body is cylindrical and the upper part is conical; the shell of the furnace body is welded by steel plates, and the lining of the furnace body is made of refractory materials.
9. The system for sintering, activating and cooling coal gangue as claimed in claim 1, wherein the upper part of the shaft furnace body is provided with an exhaust port, and the exhaust port is connected with the dust removing unit and the waste heat utilizing unit through pipelines.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2022223014418 | 2022-08-31 | ||
| CN202222301441 | 2022-08-31 |
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| CN219319040U true CN219319040U (en) | 2023-07-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117146601A (en) * | 2023-09-25 | 2023-12-01 | 中南大学 | Rapid cooling and waste heat on-line recovery device for high-temperature materials and application method thereof |
| CN118463591A (en) * | 2024-07-09 | 2024-08-09 | 安徽淮海新材料有限责任公司 | Gangue belt sintering decarburization system |
-
2022
- 2022-12-07 CN CN202223268028.2U patent/CN219319040U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117146601A (en) * | 2023-09-25 | 2023-12-01 | 中南大学 | Rapid cooling and waste heat on-line recovery device for high-temperature materials and application method thereof |
| CN117146601B (en) * | 2023-09-25 | 2024-02-09 | 中南大学 | Rapid cooling and waste heat on-line recovery device for high-temperature materials and application method thereof |
| CN118463591A (en) * | 2024-07-09 | 2024-08-09 | 安徽淮海新材料有限责任公司 | Gangue belt sintering decarburization system |
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