CN218884626U - Coal gangue sintering material shaft furnace cooling device - Google Patents
Coal gangue sintering material shaft furnace cooling device Download PDFInfo
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- CN218884626U CN218884626U CN202223268054.5U CN202223268054U CN218884626U CN 218884626 U CN218884626 U CN 218884626U CN 202223268054 U CN202223268054 U CN 202223268054U CN 218884626 U CN218884626 U CN 218884626U
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Abstract
The utility model discloses a coal gangue sintering material shaft furnace cooling device, which comprises a shaft furnace body, and further comprises a receiving system, a cooling system and a discharging system which are arranged from top to bottom in sequence; the receiving system comprises a storage tank and a vibrating 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 material groove is formed in the bottom end of the vibrating feeder; the head end of the material groove is connected with the storage tank, and the tail end of the material groove is communicated with the shaft furnace body; the tail end of the trough is provided with a baffle. The utility model discloses utilize shaft furnace refrigerated mode, solved common on-machine cooling or the annular cooler in the rate of leaking out high, the fan consumes high, the slow technological problem of cooling rate, set up the baffle through the silo end at vibrating feeder to form the material layer of dying in the silo top, avoid storing the red-hot sintering material that the jar got off to carry out the thermal shock to the silo, reduce the ageing damage of equipment.
Description
Technical Field
The utility model relates to a gangue sintering material shaft furnace cooling device.
Background
Coal resources in China are quite rich, the energy structure is mainly coal, and the yield of coal gangue is about 5% -20% of coal mining, so that the yield of coal gangue is quite large. The accumulated coal gangue stockpiled in China exceeds 80 hundred million tons, the occupied land exceeds 11 million hectares, more than 1100 coal gangue stockpiled mountains exist, and the discharge amount of the coal gangue still rapidly increases.
The mass production, discharge and stockpiling of the coal gangue not only bring about serious environmental pollution problems, but also can cause a plurality of potential safety hazards. The great consumption of coal gangue is imminent. The main component of the coal gangue is SiO 2 And Al 2 O 3 Similar to building materials. Therefore, the utilization of coal gangue as building material (such as cement admixture) is one of the important ways for realizing the bulk consumption and application of coal gangue. If the coal gangue is used for preparing building materials such as cement admixture and the like, the activity of the coal gangue must be increased by a proper method, and organic matters such as residual carbon and the like in the coal gangue are reduced. The pyrogenic roasting is an effective means for activating the coal gangue at present. Of these, the strand sintering process is importantThe pyrogenic roasting activation process for the coal gangue has the advantages of low energy consumption, high yield, strong raw material adaptability and the like, and has a good application prospect.
In the prior art, the coal gangue belt sintering process adopts an upper cooling of a belt sintering machine or an annular cooling machine for cooling. However, the strand sintering machine and the annular cooler have the defects of high air leakage rate, high fan consumption, low cooling speed, low activity and the like due to the fact that the strand sintering machine and the annular cooler do not conform to the cooling rule of the sintering material, and accordingly energy consumption is high and yield is low. In addition, when a belt type sintering machine and an annular cooler are adopted, hot sintering ores are crushed and then are fed into the cooler through a feeding device, so that the particle size distribution of the sintering ores is very large, small particles are filled in the middle of large particles, the porosity of a material layer is low, the cooling effect of a coal gangue sintering material is poor, and the activity of the coal gangue sintering material is low.
Based on this, this application proposes a gangue sintering material shaft furnace cooling device.
SUMMERY OF THE UTILITY MODEL
To cooling off on the coal gangue belt sintering technology generally adopts the machine or the annular cooler cools off, have the rate of leaking out high, the fan consumes high, cooling rate is slow and the problem that refrigerated coal gangue sintering material activity is low, the utility model aims at providing a coal gangue sintering material shaft furnace cooling device to improve the cooling efficiency and the coal gangue sintering material activity of coal gangue.
The utility model provides a coal gangue sintering material shaft furnace cooling device, which comprises a shaft furnace body, and further comprises a receiving system, a cooling system and a discharging system which are arranged from top to bottom in sequence;
the receiving system comprises a storage tank and a vibrating 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 material groove is formed in the bottom end of the vibrating feeder; the head end of the material groove is connected with the storage tank, and the tail end of the material groove is communicated with the shaft furnace body;
the tail end of the trough is provided with a baffle.
The height of the baffle is 3-8 cm.
A material-dead layer is formed above the material groove by arranging the baffle plate, so that the material groove is prevented from being thermally shocked by the hot sintering material stored from the storage tank; on the other hand, the sintered material and the dead material layer on the trough rub against each other, so that mechanical loss is caused, and the aging damage of the equipment is reduced. If the height of the baffle exceeds 8cm, blanking is hindered and is not smooth; if the height of the baffle is less than 3cm, a stable material layer with a certain thickness cannot be formed, and the protection effect is poor.
Preferably, the cooling system adopts a graded gradual cooling mode, and the cooling system sequentially comprises a first-stage cooling unit and a second-stage cooling unit from top to bottom.
Preferably, the primary cooling unit and the secondary cooling unit respectively comprise a central hood, a cold air pipe and a fan.
Further, the primary cooling unit comprises two groups of central air hoods which are arranged up and down along the height direction, and each group of central air hoods is provided with an air outlet;
the primary cooling unit also comprises two fans, the fans are symmetrically arranged on two sides of the shaft furnace body of the shaft furnace, each fan is connected with three cold air pipes, and air inlet regulating valves are arranged at the joints of the fans and the 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 corresponding air outlet is arranged on the side surface of the shaft furnace body.
Furthermore, an inverted cone is arranged between the central blast cap and the shaft furnace body of the shaft furnace, so that the collection and cooling of the coal gangue sintering material are facilitated.
Furthermore, the central hood is fixedly arranged on the cold air pipe.
Preferably, the structure of the secondary cooling unit is consistent with that of the primary cooling unit.
Preferably, the air supply system of the primary cooling unit is a dry cooling blower, and the primary cooling unit is used for carrying out first-stage cooling on the entering coal gangue sintered material, rapidly cooling and forming high-temperature waste gas; and an air supply system of the secondary cooling unit is a normal-temperature blower, and is used for carrying out secondary cooling on the entering coal gangue sintered material to form low-temperature waste gas.
Preferably, the discharging system comprises a disc discharging machine, the disc discharging machine is arranged at the bottom of the shaft furnace body of the shaft furnace, and the cooled coal gangue sintered materials are discharged through the disc discharging machine and are transported to the next procedure by a belt.
Preferably, the lower part of the shaft furnace body of the shaft furnace is cylindrical, and the upper part of the shaft furnace body of the shaft furnace is conical; the shell of the furnace body is made of steel plates by welding, and the lining of the furnace body is made of refractory materials.
Preferably, the upper part of the shaft furnace body of the shaft furnace is provided with an exhaust port, and the exhaust port is connected with a dust remover through a pipeline.
The utility model discloses following beneficial technological effect has:
(1) The utility model provides a coal gangue sintered material shaft furnace cooling device, which solves the technical problems of high air leakage rate, high fan consumption and low cooling speed in the common on-machine cooling or annular cooling machine by using a shaft furnace cooling mode; the baffle is arranged at the tail end of the trough of the vibrating feeder, so that a material death layer is formed above the trough, hot sinter materials stored in the trough are prevented from carrying out thermal shock on the trough, and the aging damage of equipment is reduced.
(2) The utility model provides a coal gangue sintering material shaft furnace cooling device, based on the cooling principle of coal gangue sintering material, creatively provides two cooling units, realizes the step cooling, namely the first cooling stage, carries out rapid cooling through a dry air cooler, can effectively store the heat energy in the hot sintering material in the glass phase formed after rapid cooling, improves the activity thereof; meanwhile, high-temperature rapid cooling can cause strong temperature-shrinkage stress in and on the particles of the sintering material, increase the fine cracks of the sintering material, reduce the strength of the sintering material, improve the grindability of the sintering material and reduce the cost for preparing the mixed material by subsequent fine grinding; in addition, high-temperature rapid cooling can form high-temperature hot waste gas, which is beneficial to recycling waste heat and reducing the energy consumption of the whole process. After high-temperature quick cooling, normal-temperature cooling can be adopted in the second stage, so that the cooling with high air quantity and low air temperature is avoided, and the energy consumption of the cooling process can be effectively reduced.
Drawings
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic structural view of a trough baffle of the vibratory feeder of the present invention.
In the figure, 1-shaft furnace body; 2-a storage tank; 3-vibrating feeder; 4-a trough; 5-a baffle plate; 6-central hood; 7-air outlet; 8, a fan; 9-a cold air pipe; 10-gas inlet regulating valve; 11-an inverted cone; 12-disc discharging machine; 13-a belt; 14-exhaust port.
Detailed Description
The invention will be further described with reference to the following examples, which are intended only for better understanding of the invention and therefore do not limit the scope of the invention.
The following examples and comparative examples use coal gangue in certain area, and the chemical composition is as follows:
Fe1.32％，SiO 2 51.66％，CaO3.44％，MgO1.67％，Al 2 O 3 20.76%, fixed carbon 3.46%, na 2 O0.44％，K 2 O0.88％。
The present invention will be further described with reference to the following specific embodiments and the accompanying drawings.
Example 1
As shown in fig. 1-2, a coal gangue sintering material shaft furnace cooling device comprises a shaft furnace body 1, a receiving system, a cooling system and a discharging system which are arranged in sequence from top to bottom;
the receiving system comprises a storage tank 2 and a vibrating feeder 3; the storage tank 2 is arranged above the vibrating feeder 3, and the storage tank 2 is used for receiving high-temperature coal gangue sintered materials; a material groove 4 is arranged at the bottom end of the vibrating feeder 3; the head end of the material groove 4 is connected with the storage tank 2, and the tail end of the material groove is communicated with the shaft furnace body 1; the end of silo is provided with baffle 5, causes to die the bed of material in order to protect the silo, and the height of baffle 5 is 5cm.
The cooling system adopts a grading gradual cooling mode and sequentially comprises a first-stage cooling unit and a second-stage cooling unit from top to bottom. The primary cooling unit comprises two groups of central hoods 6, the central hoods 6 are arranged up and down along the height direction, and an air outlet 7 is formed in each group of central hoods 6;
the primary cooling unit further comprises two fans 8, the fans 8 are symmetrically arranged on two sides of the shaft furnace body 1, each fan 8 is connected with three cold air pipes 9, and the two cold air pipes 9 are connected with the two groups of central air caps 6; the other cold air pipe 9 is arranged on the side surface of the shaft furnace body 1, and the corresponding air outlet 7 is arranged on the side surface of the shaft furnace body.
In this embodiment, the central hood 6 and the cold branch pipe 9 are made of wear-resistant and heat-resistant materials, four groups of the central hoods are arranged in the height direction, each group of hood units is provided with an air outlet, and the central hoods are fixedly mounted on the cold air pipes.
In this embodiment, set up air inlet governing valve 10 in the junction of fan and three cold air pipes, be convenient for adjust the air supply volume of each cold air pipe 9, adjust according to the charge-in rate of sintering material.
In the embodiment, an inverted cone 11 is arranged between the central funnel cap and the shaft furnace body of the shaft furnace, so that the coal gangue sintered materials can be conveniently collected and cooled.
In this embodiment, the structures of the secondary cooling unit and the primary cooling unit are consistent.
In the embodiment, an air supply system of the primary cooling unit is a dry cooling blower, and the primary cooling unit is used for carrying out first-stage cooling on the entering coal gangue sintered material, rapidly cooling and forming high-temperature waste gas; and an air supply system of the secondary cooling unit is a normal-temperature blower, and the secondary cooling is carried out on the entering coal gangue sintered material to form low-temperature waste gas.
In this embodiment, the discharging system includes a disc discharging machine 12, the disc discharging machine is disposed at the bottom of the shaft furnace body 1, and the cooled coal gangue sintered material is discharged through the disc discharging machine and transported to the next process by a belt 13.
In the embodiment, the lower part of the shaft furnace body 1 is cylindrical, and the upper part is conical; the shell of the furnace body is made of steel plates by welding, and the lining of the furnace body is made of refractory materials. The shaft furnace body is fixed on the installation foundation by a metal bracket. The side surface of the lower part of the shaft furnace body is provided with an observation hole. The shaft furnace body is internally provided with a material level controller for controlling material level, and the lower part of the shaft furnace body is provided with 2-3 temperature measuring points for controlling discharge temperature. The upper part of the shaft furnace body is provided with an exhaust port 14 which is connected with a dust remover through a pipeline.
Example 2
Directly crushing the coal gangue to-6.3 mm accounting for 72 percent and-0.5 mm accounting for about 23 percent by adopting a jaw crusher and a double-roll crusher; adding 6.0% water into crushed coal gangue powder, mixing in a strong mixer at 1800rpm for 5min, conveying the mixed ore into a cylindrical granulator for 4min, spraying 1.5% water at 45rpm, granulating to obtain small balls with water content of 7.3% and air permeability resistance of 45mmH 2 And (O). The raw materials are distributed by a roller of a belt sintering machine (the material layer height is 1000 mm), and then ignition, heat preservation and air draft sintering are carried out. The method comprises the following steps of (1) adopting waste rocks of 15-20 mm as a bedding material, wherein the thickness of the bedding material is 20mm, the ignition time is 2min, the ignition temperature is 1100oC, the ignition negative pressure is 5KPa, the heat preservation temperature is 900oC, the heat preservation time is 5min, and the heat preservation negative pressure is 5KPa; sintering under the negative pressure of 12KPa to obtain a coal gangue sintered material;
the coal gangue sintered material is discharged into a storage tank of a receiving system by a sintering machine, and the hot sintered material is fed into the furnace body of the shaft furnace by a vibrating feeder of the receiving system; the coal gangue sintered material is rapidly cooled in a primary cooling unit, the air supply temperature of a dry cooling blower of the primary cooling unit is 20-30 ℃, and the temperature of the coal gangue sintered material after primary cooling is about 350 ℃; the coal gangue sintered material cooled by the primary cooling unit enters a secondary cooling unit, and the temperature of the coal gangue sintered material cooled by the secondary cooling unit is about 40 ℃; feeding the secondarily cooled coal gangue sintered material into a hopper, discharging the material by a disc discharging machine, and conveying the material to the next process by using a belt;
crushing the cooled coal gangue sintered material to-1 mm by a jaw crusher, and dry-grinding the crushed coal gangue sintered material in a ball mill until the specific surface area of the granularity is 600m 2 About/kg, the coal gangue active mixed material can be obtained, the burning loss is 1.18 percent, and the residual carbon content is 0.72 percent. The sintering utilization coefficient of the coal gangue is 1.52 t/(m) 2 H) coal gangue sinter chargeThe activity index is 92% according to GB/T17671-1999 and GB/T12957-2005 tests.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A coal gangue sintering material shaft furnace cooling device comprises a shaft furnace body and is characterized by further comprising a receiving system, a cooling system and a discharging system which are sequentially arranged from top to bottom;
the receiving system comprises a storage tank and a vibrating 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 material groove is formed in the bottom end of the vibrating feeder; the head end of the material groove is connected with the storage tank, and the tail end of the material groove is communicated with the shaft furnace body;
the tail end of the trough is provided with a baffle.
2. The coal gangue sintering material shaft furnace cooling device according to claim 1, wherein the cooling system adopts a staged gradual cooling manner, and comprises a primary cooling unit and a secondary cooling unit in sequence from top to bottom;
the structure of the secondary cooling unit is consistent with that of the primary cooling unit.
3. The coal gangue sinter shaft furnace cooling device of claim 2, wherein the primary cooling unit and the secondary cooling unit each comprise a central hood, a cold air duct, and a fan.
4. The coal gangue sintering material shaft furnace cooling device according to claim 3, wherein the primary cooling unit comprises two sets of central hoods, the central hoods are arranged up and down along the height direction, and each set of central hoods is provided with an air outlet;
the primary cooling unit also comprises two fans, the fans are symmetrically arranged on two sides of the shaft furnace body of the shaft furnace, each fan is connected with three cold air pipes, and air inlet regulating valves are arranged at the joints of the fans and the 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 corresponding air outlet is arranged on the side surface of the shaft furnace body.
5. The coal gangue sinter shaft furnace cooling device as claimed in claim 3 or 4, wherein an inverted cone is provided between the central funnel cap and the shaft furnace body.
6. The coal gangue sinter shaft furnace cooling device of claim 3 or 4, wherein the central hood is fixedly mounted on the cold air duct.
7. The coal gangue sintered material shaft furnace cooling device according to any one of claims 2 to 4, wherein an air supply system of the primary cooling unit is a dry cooling blower, and performs first-stage cooling on the entering coal gangue sintered material, rapidly cools the coal gangue sintered material and forms high-temperature waste gas; and an air supply system of the secondary cooling unit is a normal-temperature blower, and is used for carrying out secondary cooling on the entering coal gangue sintered material to form low-temperature waste gas.
8. The coal gangue sintered material shaft furnace cooling device as defined in claim 1, wherein the discharging system comprises a disc discharging machine, the disc discharging machine is arranged at the bottom of the shaft furnace body of the shaft furnace, and the cooled coal gangue sintered material is discharged through the disc discharging machine and transported to the next process by a belt.
9. The coal gangue sinter material shaft furnace cooling device as claimed in claim 1, wherein the lower portion of the shaft furnace body is cylindrical and the upper portion thereof is conical; the shell of the furnace body is made of steel plates by welding, and the lining of the furnace body is made of refractory materials.
10. The coal gangue sinter shaft furnace cooling device as claimed in claim 1, wherein an exhaust port is provided at an upper portion of the shaft furnace body, and the exhaust port is connected to the dust remover through a pipe.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202222301442 | 2022-08-31 | ||
| CN2022223014422 | 2022-08-31 |
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Cited By (1)
| 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 |
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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 |
| 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 |
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