CN216473402U - Vertical multistage cooling equipment for pellet cooling - Google Patents
Vertical multistage cooling equipment for pellet cooling Download PDFInfo
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- CN216473402U CN216473402U CN202123224667.4U CN202123224667U CN216473402U CN 216473402 U CN216473402 U CN 216473402U CN 202123224667 U CN202123224667 U CN 202123224667U CN 216473402 U CN216473402 U CN 216473402U
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Abstract
The utility model relates to the technical field of environmental protection mechanical equipment, in particular to a vertical multistage cooling device for pellet cooling, which comprises a sealing bin, a first-level/second-level cooling chamber and a collecting bin which are arranged from top to bottom in sequence, wherein the upper part of the first-level/second-level cooling chamber is provided with a first-level/second-level air outlet, the bottom of the first-level/second-level cooling chamber is provided with a first-level/second-level central air inlet and a first-level/second-level circumferential air inlet, the first-level cooling chamber is connected with the second-level cooling chamber through a distributor, and the second-level cooling chamber discharges materials to the collecting bin through a material collector; the lower end of the primary/secondary cooling chamber is respectively provided with a primary/secondary air supply device for supplying air inside the primary/secondary cooling chamber; the equipment enables the pellets and the cooling medium to flow oppositely, improves the heat exchange efficiency and improves the cooling uniformity; through set up solitary air feed device and air outlet respectively on multistage cooling chamber, avoided calorific loss, solved the big problem of recovery wind low temperature and temperature fluctuation.
Description
Technical Field
The utility model relates to an environmental protection mechanical equipment technical field especially relates to a be used for the refrigerated multistage cooling arrangement of vertical of pellet.
Background
At present, the known methods for cooling the roasted pellet ore have three types: one is belt cooling, one is ring cooling, and the other is vertical cooling; the belt cooling is carried out, the main cooling equipment of the belt cooling is a belt machine, the sealing performance of an air box of the belt machine and a trolley is poor, the air leakage rate is high, the cooling fan needs to be configured with large air quantity, the external environmental condition of the air box is poor, the air quantity of a corresponding induced draft fan is configured and a dust remover is large in order to meet the environmental protection requirement, so that the occupied area is large, the investment is large, the energy consumption is high, and the residual heat of materials cannot be fully recycled; the annular cooling is mainly characterized in that the annular cooling machine is adopted as annular cooling equipment, pellets are laid on a trolley of the annular cooling machine, the thickness of a sintering material layer is 700-1500 mm, a plurality of cooling air boxes are arranged at the lower part of the trolley of the annular cooling machine, the trolley runs on an annular track in a circumferential mode, the annular cooling machine is adopted for sealing the pellets at present, the air leakage rate is low, but the cooling and exhausting air temperature is gradually reduced from a receiving point of the annular cooling to a discharging point, the air temperature exhausted at the rear half section of the annular cooling is useless, only the air temperature exhausted at the front half section of the annular cooling is high and reaches more than 280 ℃, and the waste heat utilization value is realized, so that the air volume used for the annular cooling is large, the electricity consumption is high, the waste heat of the pellets cannot be fully utilized and recovered, and meanwhile, the annular cooling machine moves on a plane in a circumferential mode, and has more parts, so the investment is large, the maintenance cost is high, and the running cost is high; the vertical cooling chamber, in order to fully retrieve the waste heat of pellet, multiple vertical cooling chamber appears at home, and the cooling principle of vertical cooling chamber leans on the dead weight downstream for the material from upper portion, and the cooling air is provided with one deck or multilayer cold wind distributor and high-temperature wind recoverer from upwards relative material countercurrent motion down in the vertical cold ware, but the vertical cooling chamber ubiquitous that drops into industrial application at present: the discharged pellets have the problems of high temperature, uneven cooling, low temperature of recovered air and large temperature fluctuation, so that the waste heat utilization equipment is unstable in operation and needs additional heat supplement by fuel.
The existing closed three-stage vertical cooling pellet cooling system disclosed as application number 2019202772476 controls and orderly descends wheel sets from top to bottom by means of the self weight of red hot sintering ores, so that all material layers have a cooling effect, the cooling effect is improved, the cooling rate is increased, and the power consumption is reduced; however, in the process of implementing the technical scheme, the applicant finds that the material is distributed to the wheel set in a rotating manner, so that pellets or pellets are easy to break, the powder return rate is improved, the powder content in the pellets is increased, the air permeability of the area with high powder content is poor, the cooling air resistance and energy consumption are increased, the cooling quality is reduced, meanwhile, certain heat loss is caused by the fact that low-temperature air is led out and then is sent into a high-temperature section through a fan, and meanwhile, the power consumption and the equipment maintenance cost are increased.
Accordingly, in order to solve the above problems, the applicant proposed a vertical multistage cooling apparatus for pellet cooling.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the above problem to provide a cooling efficiency height, can evenly cool off pellet or pellet, make full use of pellet waste heat be used for the refrigerated multistage cooling arrangement of pellet.
Utility model solves the problem, the technical scheme who adopts is:
a vertical multi-stage cooling device for cooling pellets comprises a sealed bin, a cooling chamber and a collecting bin which are sequentially arranged from top to bottom, wherein the cooling chamber comprises a first-stage cooling chamber and a second-stage cooling chamber; the primary cooling chamber is communicated with the sealed bin up and down, a primary air outlet is formed in the upper portion of the primary cooling chamber, a primary central air inlet is formed in the center of the bottom of the primary cooling chamber, a plurality of primary circumferential air inlets are symmetrically formed around the primary central air inlet, a distributing device is arranged below the primary circumferential air inlets, and the primary cooling chamber is connected with the secondary cooling chamber through the distributing device; the upper part of the secondary cooling chamber is provided with a secondary air outlet, the center of the bottom of the secondary cooling chamber is provided with a secondary central air inlet, a plurality of secondary circumferential air inlets are symmetrically arranged around the secondary central air inlet, a material collector is arranged below the secondary circumferential air inlet, and the secondary cooling chamber discharges materials to a material collecting bin through the material collector; the lower extreme of one-level cooling chamber, second grade cooling chamber is equipped with one-level air feed device respectively, second grade air feed device, all be equipped with central hood on one-level central air intake, the second grade central air intake respectively, all be equipped with the circumference hood on one-level circumference air intake, the second grade circumference air intake, the lateral wall of distributing device, the loading head is hollow out construction, the air outlet of one-level air feed device, second grade air feed device is connected respectively on the lateral wall of one-level central air intake, second grade central air intake and distributing device, loading head.
Adopt above-mentioned technical scheme the utility model discloses, compare with prior art, its outstanding characteristics are:
the equipment enables the pellets and the cooling medium to flow oppositely and reversely, and the position of the pellets in the material layer is changed continuously through material distribution for many times, so that the contact probability and area of the pellets and the cooling medium are increased, the heat exchange efficiency is improved, and the cooling uniformity is improved; the independent air supply device and the air outlet are respectively arranged on the multistage cooling chamber, so that heat loss is avoided, the problems of low temperature and large temperature fluctuation of recovered air are solved, the primary air outlet and the secondary air outlet are connected with different waste heat utilization devices, the stable operation of the devices can be ensured, and additional heat supplement of fuel is not needed; the equipment does not need to rotate the wheel set to distribute materials in the cooling process, thereby avoiding the breakage of pellets and reducing the powder return rate.
Preferably, the present invention further provides:
the secondary cooling chambers are communicated with each other through a distributor, the secondary cooling chambers at the tail ends are discharged to a material collecting bin through a material collector, each secondary cooling chamber is provided with a secondary air supply device, and an air outlet of each secondary air supply device is connected to a secondary central air inlet, the side wall of the material collector and the side wall of the material distributor; through setting up a plurality of second grade cooling chambers, improved pellet cooling quality, further promoted pellet refrigerated homogeneity.
The lower end of the sealed bin is provided with a discharge port, the upper end of the primary cooling chamber is provided with a feed inlet corresponding to the discharge port, the feed inlet and the discharge port are connected through a plurality of circular flanges, and the circular flanges are arranged in a layered structure; the wear resistance of the feed inlet and the discharge outlet is improved.
The central blast cap and the circumferential blast cap are tower type blast caps and are formed by stacking a plurality of flange plates with different diameters; the heat exchange efficiency is improved, and the contact probability and area of the pellet and the cooling medium are increased.
The discharging end of the material collector discharges materials to the material collecting bin through the discharging device; the device is convenient to install and maintain.
The walls of the sealed bin and the primary cooling chamber are provided with heat insulation layers; heat loss is avoided.
And a bin wall of the sealed bin is provided with a level indicator for controlling the level of the material.
The top of the primary cooling chamber is provided with a pressure measuring device; the pressure can be monitored, and the pressure is controlled to be-20-100 Pa.
The air outlet temperature of the primary air supply device is 120-160 ℃; the primary air outlet can obtain high-temperature air for stable operation of the waste heat utilization equipment.
Drawings
FIG. 1 is a schematic view showing the overall structure of a vertical multistage cooling apparatus for pellet cooling according to an embodiment of the present invention;
fig. 2 is a schematic top view of a primary cooling chamber according to an embodiment of the present invention.
In the figure: sealing the stock bin 1; a primary cooling chamber 2; a primary air outlet 201; a primary central air inlet 202; a primary circumferential air inlet 203; a secondary cooling chamber 3; a secondary air outlet 301; a secondary central air intake 302; a secondary circumferential air inlet 303; a discharge device 4; a material collecting bin 5; a central funnel cap 6; a circumferential hood 7; a distributing device 8; a material collector 9; a primary air supply device 10; and a secondary air supply device 10.
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.
As shown in fig. 1 and 2, a vertical multistage cooling device for pellet cooling comprises a sealed bin 1, a primary cooling chamber 2, a secondary cooling chamber 3 and a collecting bin 5 which are sequentially arranged from top to bottom, wherein a discharge port is arranged at the lower end of the sealed bin 1, a feed port corresponding to the discharge port is arranged at the upper end of the primary cooling chamber 2, the feed port and the discharge port are connected in a layered structure through three circular flanges, 2 primary air outlets 201 are arranged at the upper part of the primary cooling chamber 2, a primary central air inlet 202 is arranged at the center of the bottom of the primary cooling chamber 2, 4 primary circumferential air inlets 203 are symmetrically arranged around the primary central air inlet 202, 4 distributing devices 8 are arranged below the 4 primary circumferential air inlets 203, and the primary cooling chamber 2 is connected with the secondary cooling chamber 3 through the distributing devices 8; the upper part of the secondary cooling chamber 3 is provided with 2 secondary air outlets 301, the bottom center of the secondary cooling chamber 3 is provided with a secondary central air inlet 302, 4 secondary circumferential air inlets 303 are symmetrically arranged around the secondary central air inlet 302, 4 collectors 9 are arranged below the 4 secondary circumferential air inlets 303, the lower ends of the 4 collectors 9 are all connected to the discharge device 4, and the discharge end of the discharge device 4 is communicated to the collecting bin 5; the lower ends of the primary cooling chamber 2 and the secondary cooling chamber 3 are respectively provided with a primary air supply device 10 and a secondary air supply device 11, the primary central air inlet 202 and the secondary central air inlet 302 are respectively provided with a central hood 6, the primary circumferential air inlet 203 and the secondary circumferential air inlet 303 are respectively provided with a circumferential hood 7, the side walls of the distributor 8 and the material collector 9 are of hollow structures and are made of air-permeable grid plates, and the air outlets of the air supply pipelines of the primary air supply device 10 and the secondary air supply device 11 are respectively connected to the side walls of the primary central air inlet 202, the secondary central air inlet 302, the distributor 8 and the material collector 9; wherein, distributing device 8, loading head 9 are V style of calligraphy funnel shaped structure, all are provided with annular baffle on one-level circumference air intake 203, the second grade circumference air intake 303, are equipped with a plurality of circumferential seams on the annular baffle, and circumference hood 7 is connected on annular baffle's inner ring, and the pellet can be followed the circumferential seam and got into in loading head 9, the distributing device 8.
When the material is used, the baked pellets with the temperature of about 550 ℃ are conveyed to the sealed bin 1 through the high-temperature chain plate machine, the high-temperature pellets in the sealed bin 1 flow into the primary cooling chamber 2 through the discharge port by means of dead weight, and a circular truncated cone material pile is formed in the primary cooling chamber 2; performing primary cooling, blowing circulating hot air or normal-temperature air by using waste heat into a primary air supply device 10 by a fan, feeding a cooling medium into a central hood 6 and a distributor 8 by the primary air supply device 10 through an air supply pipeline, dispersedly feeding the cooling medium into a circular truncated cone stack through the surface of the central hood 6, feeding a material layer in the distributor 8 through an air-permeable grating plate on the side wall of the distributor 8, collecting the air passing through the material layer into a circumferential hood 7, dispersedly blowing the cooling medium into the circular truncated cone stack by the circumferential hood 7, collecting the air blown out from the circular truncated cone stack at the upper part of a primary cooling chamber 2, wherein the air temperature reaches 300-360 ℃, and then discharging the air from a primary air outlet 201 for waste heat utilization; the pellet ore after primary cooling flows into a distributing device 8 along a circular seam on a circumferential blast cap 7, flows into a secondary cooling chamber 3 through the distributing device 8, and forms 4 circular table material piles in the secondary cooling chamber 3; carrying out secondary cooling, wherein a cooling fan sends normal-temperature air into a secondary air supply device 11, the secondary air supply device 11 sends a cooling medium into a central hood 6 and a material collector 9 through an air supply pipeline, the cooling medium is sent into a circular truncated cone stack through the central hood 6 in a dispersing way, the cooling medium is sent into a material layer in a distributor 8 through an air-permeable grid plate on the side wall of the material collector 9, the air passing through the material layer is collected into a circumferential hood 7, then the air is blown into the circular truncated cone stack through the circumferential hood 7 in a dispersing way, the air blown out of the circular truncated cone stack is collected at the upper part of a secondary cooling chamber 3 and is sent out through a secondary air outlet 301, and the low-temperature waste heat utilization air or dust removal air is discharged after reaching the standard; the pellets with 4 circular truncated cone material layers enter a material collector 9 through a circumferential annular seam around a lower circumferential blast cap 7 and flow into a material collecting bin 5 through a discharging device 4 connected with the lower part of the material collector 9.
For further improving the pellet cooling quality and the cooling uniformity, the second-stage cooling chambers 3 can be two or more, the plurality of second-stage cooling chambers 3 are communicated with each other through the distributing device 8, the tail-end second-stage cooling chambers 3 are discharged to the collecting bin 5 through the collecting device 9, each second-stage cooling chamber 3 is provided with a second-stage air supply device 11, and the air outlet of each second-stage air supply device 11 is connected to the side wall of each second-stage central air inlet 302, the distributing device 8 and the collecting device 9.
The central blast cap 6 and the circumferential blast cap 7 are tower-type blast caps and are formed by stacking a plurality of flange plates with different diameters; the heat exchange efficiency is improved, and the probability and the area of the contact between the pellet and the cooling medium are increased.
In order to avoid heat loss, a heat insulation layer is added on the bin walls of the sealed bin 1 and the primary cooling chamber 2, and is made of heat insulation materials.
A material level meter for controlling the material level is arranged on the wall of the sealed storage bin 1.
The pressure at the top of the primary cooling chamber 2 is controlled to be-20-100 Pa, and therefore, a pressure measuring device is arranged at the top of the primary cooling chamber 2.
In order to avoid large temperature fluctuation of the recovered air, the primary air supply device 10 uses air with the temperature of 120-160 ℃ as a cooling medium, and the secondary air supply device 11 uses normal-temperature air as a cooling medium; the outlet temperature of the first-level outlet 201 can be ensured to be stabilized within the range of 300 plus 400 ℃.
The Panzhihuahenhong pellet Limited company uses the device, the pellet is conveyed to the sealed bin 1 by the chain plate machine, the pellet enters the primary cooling chamber 2 from the sealed bin 1 to exchange heat with the air fed in through the central hood 6 and the circumferential hood 7, so that the material is cooled for the first time, the air temperature discharged through the primary air outlet 201 is between 330 and 360 ℃, and the air discharged through the primary air outlet 201 is sent into a dryer as a heat source after dust removal; the material in the primary cooling chamber 2 is sent to the secondary cooling chamber 3 through a distributor 8, secondary cooling is carried out by a secondary air supply device 11, the cooled pellet ore is discharged to a discharging device 4 through a material collector 9, and then is collected in a material collecting bin 5, and finally is transported out by an automobile; the pellet temperature after secondary cooling is between 80 and 120 ℃, the pellet temperature can be adjusted according to requirements, the air temperature discharged from a secondary air outlet 301 at the upper part of the secondary cooling chamber 3 is about 150 ℃, and the pellet can be used as combustion-supporting air for pellet roasting after dust removal; after the equipment is used, at least 6.5kg of standard coal is saved per ton of pellet ore, 4550 tons of standard coal are saved annually, 12194 tons of carbon dioxide emission amount is reduced, and 34.67 tons of NxO emission is reduced.
This equipment has improved heat exchange efficiency, has promoted refrigerated homogeneity, has avoided calorific loss, can guarantee through independent air outlet that waste heat utilization equipment operates stably, need not the extra concurrent heating of fuel.
The above description is only a preferred and practical embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent variations made by using the contents of the specification and the drawings are included in the scope of the present invention.
Claims (9)
1. The utility model provides a multistage cooling arrangement of vertical for pellet refrigerated, includes sealed feed bin, cooling chamber and the collection storehouse that from top to bottom sets gradually, its characterized in that: the cooling chamber comprises a primary cooling chamber and a secondary cooling chamber;
the primary cooling chamber is communicated with the sealed bin up and down, a primary air outlet is formed in the upper portion of the primary cooling chamber, a primary central air inlet is formed in the center of the bottom of the primary cooling chamber, a plurality of primary circumferential air inlets are symmetrically formed around the primary central air inlet, a distributing device is arranged below the primary circumferential air inlets, and the primary cooling chamber is connected with the secondary cooling chamber through the distributing device;
the upper part of the secondary cooling chamber is provided with a secondary air outlet, the center of the bottom of the secondary cooling chamber is provided with a secondary central air inlet, a plurality of secondary circumferential air inlets are symmetrically arranged around the secondary central air inlet, a material collector is arranged below the secondary circumferential air inlet, and the secondary cooling chamber discharges materials to a material collecting bin through the material collector;
the lower extreme of one-level cooling chamber, second grade cooling chamber is equipped with one-level air feed device respectively, second grade air feed device, all be equipped with central hood on one-level central air intake, the second grade central air intake respectively, all be equipped with the circumference hood on one-level circumference air intake, the second grade circumference air intake, the lateral wall of distributing device, the loading head is hollow out construction, the air outlet of one-level air feed device, second grade air feed device is connected respectively on the lateral wall of one-level central air intake, second grade central air intake and distributing device, loading head.
2. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the second grade cooling chamber is provided with a plurality of, communicates through the distributing device between a plurality of second grade cooling chamber, and terminal second grade cooling chamber passes through the tripper ejection of compact to the collecting bin, all is provided with the second grade air feed device on every second grade cooling chamber, and the air outlet of second grade air feed device is connected on the lateral wall of second grade center air intake, distributing device and tripper.
3. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the lower extreme of sealed feed bin is equipped with the discharge gate, and the upper end of one-level cooling chamber is equipped with the feed inlet that corresponds with the discharge gate, and feed inlet and discharge gate are through the circular flange connection of a plurality of, and the circular flange of a plurality of is the lamellar structure and arranges.
4. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the central blast cap and the circumferential blast cap are tower type blast caps and are formed by stacking a plurality of flange plates with different diameters.
5. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the discharging device is arranged at the discharging end of the material collector and discharges the materials to the material collecting bin.
6. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the walls of the sealed storage bin and the primary cooling chamber are provided with heat insulation layers.
7. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: and a bin wall of the sealed bin is provided with a level indicator for controlling the level of the material.
8. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the top of the primary cooling chamber is provided with a pressure measuring device.
9. The vertical multistage cooling apparatus for pellet cooling as claimed in claim 1, wherein: the air outlet temperature of the primary air supply device is 120-160 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123224667.4U CN216473402U (en) | 2021-12-21 | 2021-12-21 | Vertical multistage cooling equipment for pellet cooling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123224667.4U CN216473402U (en) | 2021-12-21 | 2021-12-21 | Vertical multistage cooling equipment for pellet cooling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216473402U true CN216473402U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123224667.4U Active CN216473402U (en) | 2021-12-21 | 2021-12-21 | Vertical multistage cooling equipment for pellet cooling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216473402U (en) |
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2021
- 2021-12-21 CN CN202123224667.4U patent/CN216473402U/en active Active
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