CN218937048U - Secondary cooling vertical cooler - Google Patents
Secondary cooling vertical cooler Download PDFInfo
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- CN218937048U CN218937048U CN202223577344.8U CN202223577344U CN218937048U CN 218937048 U CN218937048 U CN 218937048U CN 202223577344 U CN202223577344 U CN 202223577344U CN 218937048 U CN218937048 U CN 218937048U
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model relates to the technical field of cooling kilns, and provides a secondary cooling vertical cooler, wherein a conical masonry (3) is arranged, and the outer side of the conical masonry and a discharging bin body (4) positioned at the bottom of the vertical cooler form a low-temperature cooling area of the vertical cooler together; the inside and the upper part of the conical masonry (3) are high-temperature cooling areas of the vertical cooler; a cooling air inlet is formed in the discharging bin body (4), one side of the cooling air inlet is communicated with a blower, and the other side of the cooling air inlet is communicated with a low-temperature cooling area; the outside of toper brickwork (3) is provided with annular wind channel (6), and this annular wind channel (6) one side communicates with each other with the low temperature cooling zone, and the opposite side passes through the tuber pipe and links to each other with the exhaust fan that sets up in annular wind channel (6) outside. The utility model can overcome the defect that the existing vertical cooler enables all cooling air from the hood to serve as secondary air.
Description
Technical Field
The utility model relates to the technical field of cooling kilns, in particular to a secondary cooling vertical cooler.
Background
The sintering process is to mix various powdery materials, fluxing agent and fine coke, pelletize, and then put the mixture into a sintering machine to complete sintering reaction, so that the powdery materials are converted into massive materials. The sintered agglomerate needs to be cooled before entering the next working procedure, and meanwhile, the sensible heat of the agglomerate can be recovered for effective utilization. The vertical cold kiln is a device for cooling sinter and recovering waste heat, the total heat exchange process in the vertical cold kiln is countercurrent heat exchange, sinter particles are input into the kiln body from the upper part through a charging bucket, enter a cooling cavity after being buffered and exchange heat with cold air, the bottom of the kiln body is discharged through a discharging device and then is subjected to subsequent processing, cooling air enters from the lower part of the kiln body, the temperature rises after the cooling cavity absorbs the heat of the sinter, and the heat air above the kiln body is converged and discharged and then is subjected to subsequent heat utilization.
Most of the traditional factories use ring coolers or belt coolers to cool sinter and recycle waste heat, but the traditional factories have certain disadvantages: high air leakage rate, low waste heat recovery efficiency, low quality of cooling waste gas, serious pollutant discharge and the like.
The existing vertical cooler generally comprises a discharging area, a material storage area, a grate and a kiln head cover. The structure of the vertical cooler with the double discharging devices is shown in fig. 1, cooling air enters from a discharging area at the bottom, enters into a material storage area through a hood arranged above the discharging area, performs two-phase heat exchange with sinter rolling on a grate, and the air after heat exchange exits from the cooler through a kiln hood for waste heat recovery.
All cooling air of the existing vertical cooler can enter the material storage area through the hood, all cooling air coming out of the hood can be used as secondary air, so that the temperature of secondary combustion supporting air is low, and further the gas-solid two-phase heat exchange effect of sinter and cooling gas is not ideal, the yield of a lime kiln cannot be improved, and the waste heat recovery efficiency is low.
Disclosure of Invention
The utility model aims to solve the existing problems and provides a secondary cooling vertical cooler, which can overcome the defect that all cooling air from a hood is completely used as secondary air by the existing vertical cooler.
The aim of the utility model is realized by the following technical scheme:
the utility model provides a secondary cooling vertical cooler, which comprises:
the feeding bin body, the grate, the conical masonry, the discharging bin body and the kiln head cover; the kiln head cover is arranged at the top of the vertical cooler and is provided with an air outlet; the bin body is positioned at the top of the vertical cooler; the grate is obliquely arranged in the high-temperature cooling area and is led to a discharge hole at the side edge of the vertical cooler;
the secondary cooling vertical cooler also comprises an annular air duct;
the conical masonry is one, and the outer side of the conical masonry and the discharging bin body positioned at the bottom of the vertical cooler form a low-temperature cooling area of the vertical cooler together; the inside and upper part of the conical masonry are high-temperature cooling areas of the vertical cooler;
a cooling air inlet is formed in the discharging bin body, one side of the cooling air inlet is communicated with the blower, and the other side of the cooling air inlet is communicated with the low-temperature cooling area;
the outside of toper brickwork is provided with annular wind channel, and this annular wind channel one side communicates with each other with the low temperature cooling zone, and the opposite side passes through the tuber pipe and links to each other with the exhaust fan that sets up in annular wind channel outside.
Still further, the high temperature cooling zone is provided with a level gauge.
Further, the high temperature cooling zone is vented to a thermocouple.
As can be seen from the technical scheme of the utility model, the utility model is characterized in that
1. According to the utility model, the annular air duct arranged outside the low-temperature cooling area can partially extract primary cooling air in the low-temperature cooling area, so that the air quantity of secondary cooling air entering the high-temperature cooling area can be controlled, and the temperature of the secondary cooling air can be controlled by carrying out heat exchange with sinter with a certain material layer thickness in the high-temperature cooling area; as the secondary cooling air is led to the calcining kiln and used as combustion-supporting air, the calcining temperature in the calcining kiln can be increased, so that the sintered ore in the calcining kiln can be rapidly decomposed, the yield of the sintered ore is greatly improved, and the coal consumption can be greatly reduced.
2. According to the utility model, the annular air duct is arranged outside the low-temperature cooling area, and the primary cooling air of the low-temperature cooling area is partially extracted, so that the total air quantity of the primary cooling air entering the low-temperature cooling area can be controlled, and the ash outlet temperature can be adjusted at any time through heat exchange between the primary cooling air with a certain total air quantity and the sinter which passes through the low-temperature cooling area in a reverse way, thereby ensuring the safe operation of the discharging conveying equipment.
3. The vertical cooler is divided into the low-temperature cooling area and the high-temperature cooling area, and the total air quantity of primary cooling air entering the low-temperature cooling area and the air quantity of secondary cooling air entering the high-temperature cooling area are controlled through the annular air duct arranged outside the low-temperature cooling area, so that the whole vertical cooler can meet the ash outlet temperature of the mineral ash without being arranged very high, the dropping height of the discharging of the sinter is reduced, and the breakage rate of the sinter is reduced.
4. The utility model has the advantages of low overall investment cost, few moving parts, long service life and convenient maintenance.
5. The utility model has compact overall layout and small occupied area, and greatly saves land space and cost.
Drawings
FIG. 1 is a schematic diagram of a prior art vertical cooler with dual discharge devices;
fig. 2 is a schematic structural diagram of a secondary cooling vertical cooler according to the present utility model.
In the accompanying drawings:
the device comprises a feeding hopper 1, a grate 2, a conical masonry 3, a discharging material 4, a kiln head cover 5, an annular air duct 6, a thermocouple 7 and a material level meter 8.
Detailed Description
In order to better understand the technical solutions of the present application, the present utility model will be further described in detail below with reference to the accompanying drawings.
The terms of upper, lower, left, right, front, rear, and the like in the present application are established based on the positional relationship shown in the drawings. The drawings are different, and the corresponding positional relationship may be changed, so that the scope of protection cannot be understood.
The utility model provides a secondary cooling vertical cooler, the structure of which is shown in figure 2, comprising: the feeding bin body 1, the grate 2, the conical masonry 3, the discharging bin body 4, the kiln head cover 5, the annular air duct 6, the thermocouple 7 and the level gauge 8.
The kiln head cover 5 is arranged at the top of the vertical cooler and is provided with an air outlet for conveying hot air which is subjected to heat exchange with the sintered ore in the vertical cooler into the calcining kiln for secondary utilization;
the storage bin body 1 is positioned at the top of the vertical cooler and is used for conveying the sinter into the vertical cooler;
the outer side of the conical masonry 3 and the discharging bin body 4 positioned at the bottom of the vertical cooler form a low-temperature cooling area of the vertical cooler together; the inside and the upper part of the conical masonry 3 are high-temperature cooling areas of the vertical cooler;
a cooling air inlet is formed in the discharging bin body 4, one side of the cooling air inlet is communicated with a blower, and the other side of the cooling air inlet is communicated with a low-temperature cooling area; for introducing cooling air into the low temperature cooling zone; the cooling air entering the low-temperature cooling zone is referred to herein as primary cooling air.
In the low-temperature cooling area, the cooling air exchanges heat with the sinter which passes through the low-temperature cooling area in a reverse way, the sinter is cooled, and the cooling air is heated; the heated cooling air enters the high-temperature cooling area along the internal channel of the conical masonry 3, and continuously performs secondary heat exchange with the sinter which passes through the high-temperature cooling area in the reverse direction; the cooling air entering the high temperature cooling zone is referred to herein as secondary cooling air.
The conical masonry 3 is one, the outside of the conical masonry is provided with an annular air duct 6, one side of the annular air duct 6 is communicated with the low-temperature cooling area, and the other side of the annular air duct 6 is connected with an exhaust fan arranged on the outside of the annular air duct 6 through an air duct.
The grate 2 is obliquely arranged in the high-temperature cooling area and is led to a discharge hole at the side edge of the vertical cooler and used for bearing the sinter entering the vertical cooler; the grate 2 can screen out the sinter meeting the granularity requirement in the running process and send out the sinter through a discharge hole at the side of the vertical cooler; and after the mineral ashes fall from the sieve holes at the bottom of the grate 2, heat exchange is carried out between the mineral ashes and secondary cooling air in a high-temperature cooling area, then the mineral ashes enter a low-temperature cooling area through an internal channel of the conical masonry 3 to exchange heat with the primary cooling air again, and finally the mineral ashes are conveyed out from the bottom along a discharging bin body 4.
The high-temperature cooling area is provided with a material level gauge 8 for monitoring the material layer height of the high-temperature cooling area stock. The material level gauge 8 is connected with the central control room in a wired or wireless mode, and can transmit the monitored height of the material layer to the central control room; the central control room is connected with the blanking device of the bin body 1 in a wired or wireless mode, and can control the blanking speed of the sintering ore in the bin body 1 according to the signal of the level gauge so as to ensure the height of the material layer of the high-temperature cooling area.
The high-temperature cooling area is communicated with a thermocouple 7 for monitoring the temperature of the high-temperature cooling area so as to ensure the temperature of secondary cooling air in the high-temperature cooling area; the thermocouple is connected with the central control room in a wired or wireless mode, and can feed back the sensed temperature signal to the central control room, and the central control room is connected with the blower and the exhaust fan at the outer side of the annular air duct 6 in a wired or wireless mode; the central control room controls the total air quantity of primary cooling air blown into the vertical cooler by the blower according to the information of the thermocouple, and controls the air quantity of the exhaust fan outside the annular air duct 6. The air discharged from the exhaust fan outside the circular duct 6 is referred to herein as tertiary air.
The primary cooling air of the low-temperature cooling area is divided into two parts: part of the primary cooling air enters a high-temperature cooling area as secondary cooling air to continuously cool the sinter which reversely flows through the high-temperature cooling area, meanwhile, the primary cooling air is heated to 1100-1150 ℃ through heat exchange with the sinter which reversely flows through the low-temperature cooling area, and then enters an external calcining kiln from a discharging opening of a discharging bin body 4 to serve as combustion-supporting air; the other part is extracted from the low-temperature cooling area through the annular air duct 6 to form tertiary air, one part of the tertiary air is used for combustion-supporting primary air of a burner arranged at the periphery of the vertical cooler, and the other part of the tertiary air is used as coal mill drying air arranged at the periphery of the vertical cooler.
By the monitoring signals of the thermocouple 7 and the level gauge 8, the mutual linkage of the air quantity, the temperature and the level can be realized. When the thermocouple 7 monitors that the temperature of the high-temperature cooling area is higher than the set temperature, tertiary air pumped out by an exhaust fan at the outer side of the annular air duct 6 is reduced, so that secondary cooling air capable of entering the high-temperature cooling area is increased; otherwise, the air quantity of tertiary air is increased. When the height of the material layer in the high-temperature cooling area is lower than the set height, the blanking is accelerated, and the air quantity of tertiary air extracted by an exhaust fan at the outer side of the annular air duct 6 is controlled to be increased, so that secondary cooling air is reduced, and the temperature of combustion air from a kiln head cap is still controlled within a set temperature range after heat exchange between the material storage of the sintered ore and the secondary cooling air is ensured; when the height of the material layer in the high-temperature cooling area is higher than the set height, the blanking speed is reduced, and the air quantity of tertiary air pumped out by an exhaust fan at the outer side of the annular air duct 6 is controlled to be reduced, so that the air quantity of secondary cooling air entering the high-temperature cooling area is increased, and the temperature of combustion-supporting air from a kiln head cap is still controlled within the set temperature range after heat exchange between the material stock of the sinter and the secondary cooling air is ensured.
The total air quantity of primary cooling air and the air quantity of tertiary air are adjusted according to the ash outlet temperature in the low-temperature cooling area, and the ash outlet temperature is ensured to be less than or equal to 80-100 ℃. If the ash outlet temperature is higher than the temperature, the total air quantity of primary cooling air and the air exhaust quantity of tertiary air are increased, so that the mineral ash passing through the low-temperature cooling area in the reverse direction can be fully heat exchanged with the primary cooling air, and in order to ensure the air quantity of secondary cooling air entering the high-temperature cooling area, the air exhaust quantity of tertiary air is also increased at the moment due to the increase of the total primary cooling air quantity; otherwise, the total air quantity of the primary cooling air and the air discharge quantity of the tertiary air are reduced.
While the utility model has been disclosed in terms of preferred embodiments, the embodiments are not limiting of the utility model. Any equivalent changes or modifications can be made without departing from the spirit and scope of the present utility model, and are intended to be within the scope of the present utility model. The scope of the utility model should therefore be determined by the following claims.
Claims (3)
1. A secondary cooling vertical cooler, the secondary cooling vertical cooler comprising: the feeding bin body (1), the grate (2), the conical masonry (3), the discharging bin body (4) and the kiln head cover (5); the kiln head cover (5) is arranged at the top of the vertical cooler and is provided with an air outlet; the bin body (1) is positioned at the top of the vertical cooler; the grate (2) is obliquely arranged in the high-temperature cooling area and is led to a discharge hole at the side edge of the vertical cooler; the method is characterized in that:
the secondary cooling vertical cooler also comprises an annular air duct (6);
the conical masonry (3) is one, and the outer side of the conical masonry and the discharging bin body (4) positioned at the bottom of the vertical cooler form a low-temperature cooling area of the vertical cooler together; the inside and the upper part of the conical masonry (3) are high-temperature cooling areas of the vertical cooler;
a cooling air inlet is formed in the discharging bin body (4), one side of the cooling air inlet is communicated with a blower, and the other side of the cooling air inlet is communicated with a low-temperature cooling area;
the outside of toper brickwork (3) is provided with annular wind channel (6), and this annular wind channel (6) one side communicates with each other with the low temperature cooling zone, and the opposite side passes through the tuber pipe and links to each other with the exhaust fan that sets up in annular wind channel (6) outside.
2. The secondary cooling vertical cooler according to claim 1, wherein:
the high-temperature cooling area is provided with a material level gauge (8).
3. The secondary cooling vertical cooler according to claim 1, wherein:
the high-temperature cooling area is communicated with a thermocouple (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223577344.8U CN218937048U (en) | 2022-12-30 | 2022-12-30 | Secondary cooling vertical cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223577344.8U CN218937048U (en) | 2022-12-30 | 2022-12-30 | Secondary cooling vertical cooler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218937048U true CN218937048U (en) | 2023-04-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223577344.8U Active CN218937048U (en) | 2022-12-30 | 2022-12-30 | Secondary cooling vertical cooler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218937048U (en) |
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2022
- 2022-12-30 CN CN202223577344.8U patent/CN218937048U/en active Active
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