CN216694387U - Pellet cooling and drying coupling equipment - Google Patents
Pellet cooling and drying coupling equipment Download PDFInfo
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- CN216694387U CN216694387U CN202220014535.4U CN202220014535U CN216694387U CN 216694387 U CN216694387 U CN 216694387U CN 202220014535 U CN202220014535 U CN 202220014535U CN 216694387 U CN216694387 U CN 216694387U
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Abstract
The utility model relates to pellet cooling and drying coupling equipment, and belongs to the technical field of metallurgical mechanical equipment. The equipment comprises two pellet conveying units which are respectively a furnace-entering pellet conveying unit and a furnace-discharging pellet conveying unit; the air inlet box and the switching air box are also included; the inlet end of the air inlet box is connected with the wind power supply unit, and the outlet end of the air inlet box vertically faces to the conveying belt of the discharged pellet conveying unit so as to cool discharged high-temperature pellets on the conveying belt through blown gas; the inlet end of the transfer air box is opposite to the outlet end of the air inlet box so as to collect the heated gas flowing through the discharged high-temperature pellets, and the outlet end of the transfer air box vertically faces to the conveying belt of the furnace-entering pellet conveying unit so as to blow dry the pellets to be charged on the conveying belt through the heated gas. The equipment can fully recycle the heat of the high-temperature pellets on the conveying belt of the outgoing pellet conveying unit, and is used for drying the pellets to be fed into the furnace, so that the energy consumption is reduced, and the effects of energy conservation and emission reduction are achieved.
Description
Technical Field
The utility model belongs to the technical field of metallurgical mechanical equipment, and particularly relates to pellet cooling and drying coupling equipment.
Background
The technology of the rotary hearth furnace is gradually mature, and the high-temperature pellets produced by discharging the pellets from the furnace and at the temperature of about 1100 ℃ are cooled by adopting an indirect water cooling mode, so that heat is wasted, and water resources are consumed; meanwhile, pellets fed into the rotary hearth furnace need to be dried from 10-15% of water content to less than 1% of water content, energy consumption is needed, and operation cost and CO are increased2The amount of production; all need further improvement and optimization.
SUMMERY OF THE UTILITY MODEL
In view of the above, the utility model aims to provide a pellet cooling and drying coupling device to solve the problem of high energy consumption in the cooling process of high-temperature pellets discharged from a rotary hearth furnace and the drying process of wet pellets entering the rotary hearth furnace, so as to achieve the effects of energy conservation and emission reduction.
In order to achieve the purpose, the utility model provides the following technical scheme:
the pellet cooling and drying coupling equipment comprises pellet conveying units, wherein each pellet conveying unit is provided with a movable conveying belt for conveying pellets placed on the conveying belt, and the two pellet conveying units are respectively an in-furnace pellet conveying unit and an out-furnace pellet conveying unit; the air inlet box and the switching air box are also included; the inlet end of the air inlet box is connected with the wind power supply unit, and the outlet end of the air inlet box vertically faces to the conveying belt of the discharged pellet conveying unit so as to cool discharged high-temperature pellets on the conveying belt through blown gas; the inlet end of the transfer air box is opposite to the outlet end of the air inlet box so as to collect the heated gas flowing through the discharged high-temperature pellets, and the outlet end of the transfer air box vertically faces to the conveying belt of the charged pellet conveying unit so as to blow dry the pellets to be charged on the conveying belt through the heated gas.
Further perfecting the technical scheme, the outlet end of the air inlet box, the inlet end of the transfer air box and the outlet end of the transfer air box are all widened structures extending along the length direction of the facing conveying belt, so that the conveying belt with longer distance can be covered.
The inlet end of the air outlet box is opposite to the outlet end of the transfer air box through a conveying belt of the furnace pellet conveying unit so as to collect gas which is heated after flowing through the furnace pellets; the outlet end of the air outlet box is externally arranged or connected with a wind power recycling unit.
Further, the furnace-entering pellet conveying unit is positioned right above the furnace-discharging pellet conveying unit; the transfer air box is positioned between the furnace-entering pellet conveying unit and the furnace-discharging pellet conveying unit and vertically penetrates through the transfer air box, the outlet end of the air inlet box is positioned right below the furnace-discharging pellet conveying unit, and the inlet end of the air outlet box is positioned right above the furnace-entering pellet conveying unit; a plurality of through holes are formed in the two conveying belts to allow air to penetrate through the conveying belts.
Furthermore, the air inlet box, the furnace entering pellet conveying unit, the transfer air box, the furnace discharging pellet conveying unit and the air discharging box are all fixedly connected to the same base frame; the inlet end of the air inlet box is arranged on the side wall of the air inlet box, a plurality of ash falling holes are formed in the bottom wall of the air inlet box at intervals along the length direction of a conveying belt of the furnace pellet conveying unit, and an ash deposition hopper is arranged below the ash falling holes.
Further, the device also comprises a to-be-charged pellet screening and distributing device and a discharged high-temperature pellet distributing device; the discharging end of the to-be-charged pellet screening and distributing device is connected with the to-be-charged pellet conveying unit in a blanking manner, so that pellets to be charged are conveniently blanked on a conveying belt of the to-be-charged pellet conveying unit at a certain speed; the discharging end of the discharging high-temperature pellet distributing device is connected with the discharging pellet conveying unit so as to enable the discharging high-temperature pellets to be conveniently dropped on a conveying belt of the discharging pellet conveying unit at a certain speed.
Further, the wind power supply unit connected with the inlet end of the air inlet box is a tail gas outlet of the rotary hearth furnace.
Further, the feeding pellet conveying unit and the discharging pellet conveying unit are parallel and parallel to each other, and the conveying moving directions of the two conveying belts are opposite.
Optionally, the pellet conveying unit is a belt transmission mechanism, and comprises a circle of transmission belt and two transmission tension wheels which are arranged at the inner side of the transmission belt at intervals and tension the transmission belt, and any transmission tension wheel is connected with the driving device; the drive belt is formed as said conveyor belt.
Optionally, the pellet conveying unit is a chain transmission mechanism and comprises a circle of chain and two transmission wheels which are positioned at the inner side of the chain at intervals and tension the chain, the chain is in transmission connection with the two transmission wheels, any transmission wheel is connected with a driving device, the chain is connected with a plurality of grate plates, and all the grate plates are arranged at intervals along the length direction of the chain and connected to the outer side of the chain; the chain and all the grid plates on the chain form the conveying belt.
The belt transmission mechanism and the chain transmission mechanism are both in the prior art, and also comprise a supporting frame body of a basic structure, a roller wheel and the like for supporting the conveying belt in the middle, and the details are not repeated here.
The utility model has the beneficial effects that:
the pellet cooling and drying coupling equipment provided by the utility model starts from the utilization of the heat of the discharged high-temperature pellets of the rotary hearth furnace, adopts integrated equipment on the premise of not obviously reducing the metallization rate of the pellets, can fully recycle the heat of the discharged high-temperature pellets by utilizing the tail gas of the rotary hearth furnace, and is used for drying the pellets to be charged (wet) required by the rotary hearth furnace, so that the overall energy consumption is reduced, and the effects of energy conservation and emission reduction are achieved.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objectives and other advantages of the utility model may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For a better understanding of the objects, aspects and advantages of the present invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural diagram of a pellet cooling and drying coupling device according to an embodiment (a dotted line indicates a gas flow direction).
Reference numerals:
the device comprises a to-be-charged pellet screening and distributing device 1, a charged pellet conveying unit 2, a discharged high-temperature pellet distributing device 3, a discharged pellet conveying unit 4, an air inlet box 5, a transfer air box 6, an air outlet box 7 and an ash deposition bucket 8.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the utility model only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the utility model thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a pellet cooling and drying coupling apparatus includes two pellet conveying units, each of the two pellet conveying units includes an incoming pellet conveying unit 2 and an outgoing pellet conveying unit 4; the air inlet box 5 and the transfer air box 6 are also included; the inlet end of the air inlet box 5 is connected with a wind power supply unit, and the outlet end of the air inlet box 5 vertically faces to the conveying belt of the discharged pellet conveying unit 4 so as to cool discharged high-temperature pellets on the conveying belt through blown gas;
the inlet end of the transfer air box 6 is opposite to the outlet end of the air inlet box 5 so as to collect the heated gas flowing through the discharged high-temperature pellets, it can be understood that the corresponding conveyor belt section of the discharged pellet conveying unit 4 should be located between the inlet end of the transfer air box 6 and the outlet end of the air inlet box 5, and the outlet end of the transfer air box 6 vertically faces the conveyor belt of the charged pellet conveying unit 2 so as to blow-dry the pellets to be charged on the conveyor belt through the heated gas.
The pellet cooling and drying coupling equipment of the embodiment, during the use, the conveyer belt of the out-of-furnace high temperature pellet accessible out-of-furnace pellet conveying unit 4 of the rotary hearth furnace is continuously sent out, the conveyer belt that the stove (wet) pellet accessible of waiting to go into the stove of the rotary hearth furnace 2 is continuously supplied to need to be added, gas with certain wind speed is continuously introduced from the entry end of the air inlet box 5, gas flows through out-of-furnace high temperature pellet and takes place the heat exchange, thereby cool off out-of-furnace high temperature pellet, gas after the intensification blows to the stove (wet) pellet of waiting to go into behind switching bellows 6 again, will wait to go into stove (wet) pellet drying. The equipment can couple the cooling of high-temperature pellets discharged from the rotary hearth furnace and the drying operation of pellets to be charged into the furnace, reduce energy consumption and achieve the effects of energy conservation and emission reduction.
Wherein, the conveyer belts of the pellet conveying unit 2 entering the furnace and the pellet conveying unit 4 leaving the furnace all have certain linear length, and the outlet end of the air inlet box 5, the inlet end and the outlet end of the transfer air box 6 are all widened structures extending along the length direction of the conveyer belt facing to cover the pellets on the conveyer belt with longer distance.
Therefore, the longer distance of the conveying belt can be covered in the cooling and drying operation process, and the operation effect is improved.
The device also comprises an air outlet box 7, wherein the inlet end of the air outlet box 7 is opposite to the outlet end of the transfer air box 6 through a conveying belt of the furnace pellet conveying unit 2 so as to collect gas which is heated after flowing through the furnace pellets; the outlet end of the air outlet box 7 is externally arranged or connected with a wind power recycling unit.
Therefore, the functional design of the equipment is further perfected, and the pollution to the environment or the waste of available energy is avoided.
Wherein the charging pellet conveying unit 2 is positioned right above the discharging pellet conveying unit 4; the transfer air box 6 is positioned between the furnace-entering pellet conveying unit 2 and the furnace-discharging pellet conveying unit 4 and is of a vertically-penetrating uniform-section structure, the outlet end of the air inlet box 5 is positioned right below the furnace-discharging pellet conveying unit 4, and the inlet end of the air outlet box 7 is positioned right above the furnace-entering pellet conveying unit 2; a plurality of through holes are formed in the two conveying belts to allow the air to penetrate through the conveying belts.
Therefore, the occupation of ground space can be saved; the guiding and utilizing performance of flowing gas is better, and the operation effect is further improved.
The air inlet box 5, the furnace entering pellet conveying unit 2, the transfer air box 6, the furnace outlet pellet conveying unit 4 and the air outlet box 7 are all fixedly connected to the same base frame (not shown in the figure); the inlet end of the air inlet box 5 is arranged on the side wall of the air inlet box 5, a plurality of ash falling holes are arranged on the bottom wall of the air inlet box 5 at intervals along the length direction of the conveying belt of the furnace entering pellet conveying unit 2, and an ash deposition hopper 8 is arranged below the ash falling holes.
Therefore, the functional design is perfected, the integrity of the equipment is improved, and the use is more stable and reliable. During implementation, because equipment is multilayer structure, the bed frame can adopt frame construction's multilayer form, bears each level unit respectively to guarantee stability in use, can not block gaseous operation of flowing from bottom to top and be the structural design principle.
The device comprises a to-be-charged pellet screening and distributing device 1 and a discharged high-temperature pellet distributing device 3; the discharging end of the to-be-charged pellet screening and distributing device 1 is connected with the to-be-charged pellet conveying unit 2 in a blanking mode, so that pellets to be charged are conveniently blanked on a conveying belt of the to-be-charged pellet conveying unit 2 at a certain speed; the discharging end of the discharging high-temperature pellet distributing device 3 is connected with a discharging pellet conveying unit 4 so as to conveniently drop the discharging high-temperature pellets on a conveying belt of the discharging pellet conveying unit 4 at a certain speed; the feeding end of the discharging high-temperature pellet distributing device 3 is connected with a high-temperature pellet discharging port (not shown in the figure) of the rotary hearth furnace. The wind power supply unit connected with the inlet end of the wind inlet box 5 is a tail gas outlet (not shown in the figure) of the rotary hearth furnace.
Like this, further perfect functional design, improve equipment wholeness, the distributing device is convenient for match the pellet stack thickness on the control conveyer belt, the guarantee cooling, dry operation effect. The temperature of the flue gas of the rotary hearth furnace after waste heat recovery discharged from the tail gas outlet of the rotary hearth furnace is about 120 ℃ and 140 ℃, and the air quantity is 80000Nm3And/h, the air-cooled rotary hearth furnace can be used as a high-quality wind power supply unit, and the tail gas of the rotary hearth furnace is used for cooling and drying, so that the energy consumption can be further reduced.
Wherein, the charging pellet conveying unit 2 and the discharging pellet conveying unit 4 are parallel and parallel to each other, and the conveying moving directions of the two conveying belts are opposite.
Like this, make the (wet) ball of treating on the conveyer belt of entering stove pellet conveying unit 2 contact the gas that the temperature is higher and higher gradually, dry step by step, drying effect is better.
In the embodiment, the chain transmission mechanism for the two pellet conveying units comprises a circle of chain and two transmission wheels which are positioned at the inner side of the chain at intervals and tension the chain, the chain is in transmission connection with the two transmission wheels, any transmission wheel is connected with a driving device, the chain is connected with a plurality of grate plates, and all the grate plates are arranged at intervals along the length direction of the chain and are connected to the outer side of the chain; the chain and all the grid plates on the chain form the conveying belt, and the grid plates are provided with the through holes which penetrate through.
Example (b):
taking pellet cooling and drying in a 20-kiloton/a scale rotary hearth furnace production line as an example:
the discharged high-temperature pellets produced by the rotary hearth furnace are distributed on the grate plate of the discharged pellet conveying unit 4 uniformly at 20t/h and about 1100 ℃ through the discharged high-temperature pellet distribution device 3, the thickness of a material layer is 100mm, the tail gas temperature of the rotary hearth furnace after waste heat recovery is about 130 ℃, and the air volume is 80000Nm3And h, passing through a discharged high-temperature pellet material layer on the grate plate from the air inlet box 5 from bottom to top, cooling the pellets to below 200 ℃ step by step, and simultaneously heating tail gas of the rotary hearth furnace into 150-350 ℃ hot air to enter the transfer air box 6. About 15.3GJ/h of heat is released in the cooling process of the discharged high-temperature pellets.
The amount of pellets to be fed into the rotary hearth furnace is 35t/h, the water content is 12 percent, the pellets to be fed into the rotary hearth furnace are uniformly distributed on a grate plate of the pellet feeding unit 2 through the pellet screening and distributing device 1 to be fed into the furnace, the thickness of a material layer is 150mm, the conveying and moving directions of the pellet feeding unit 4 and the grate plate of the pellet feeding unit 2 are opposite, hot air from the transfer air box 6 penetrates through the material measuring layer of the pellets to be fed into the furnace from bottom to top, and the pellets are dried to the water content below 1 percent step by step. In the drying process, the heat quantity is about 14.5GJ/h because of the temperature rise, the moisture evaporation, the heat dissipation and the like of the wet pellets, and the heat quantity is basically equal to the heat quantity released in the cooling process of the discharged high-temperature pellets. Dust generated in the pellet cooling and drying process falls into an ash deposition hopper 8 arranged at the lower part for collection.
The pellet cooling and drying coupling device provided by the embodiment starts from the utilization of the heat of the discharged high-temperature pellets of the rotary hearth furnace, adopts integrated equipment on the premise of not obviously reducing the metallization rate of the pellets, can fully recycle the heat of the discharged high-temperature pellets by utilizing the tail gas of the rotary hearth furnace, and is used for drying the wet pellets required by the rotary hearth furnace, so that the overall energy consumption is reduced, and the effects of energy conservation and emission reduction are achieved.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (10)
1. The utility model provides a pellet cooling drying coupling equipment, includes pellet conveying unit, pellet conveying unit has mobilizable conveyer belt for the transportation arranges the pellet on the conveyer belt, its characterized in that: the number of the pellet conveying units is two, and the two pellet conveying units are respectively an incoming pellet conveying unit and an outgoing pellet conveying unit;
the air inlet box and the switching air box are also included;
the inlet end of the air inlet box is connected with the wind power supply unit, and the outlet end of the air inlet box vertically faces to the conveying belt of the discharged pellet conveying unit so as to cool discharged high-temperature pellets on the conveying belt through blown gas;
the inlet end of the transfer air box is opposite to the outlet end of the air inlet box so as to collect the heated gas flowing through the discharged high-temperature pellets, and the outlet end of the transfer air box vertically faces to the conveying belt of the charged pellet conveying unit so as to blow dry the pellets to be charged on the conveying belt through the heated gas.
2. The pellet cooling and drying coupling equipment of claim 1, wherein: the outlet end of the air inlet box, the inlet end of the transfer air box and the outlet end of the air inlet box are all widened structures extending along the length direction of the facing conveying belt, so that the conveying belt can be used for covering a longer distance.
3. The pellet cooling and drying coupling equipment of claim 1, wherein: the inlet end of the air outlet box is opposite to the outlet end of the transfer air box through a conveying belt of the furnace pellet conveying unit so as to collect gas which flows through the furnace pellets to be heated; the outlet end of the air outlet box is externally arranged or connected with a wind power recycling unit.
4. The pellet cooling and drying coupling device of claim 3, wherein: the charging pellet conveying unit is positioned right above the discharging pellet conveying unit; the transfer air box is positioned between the furnace-entering pellet conveying unit and the furnace-discharging pellet conveying unit and vertically penetrates through the transfer air box, the outlet end of the air inlet box is positioned right below the furnace-discharging pellet conveying unit, and the inlet end of the air outlet box is positioned right above the furnace-entering pellet conveying unit;
a plurality of through holes are formed in the two conveying belts to allow the air to penetrate through the conveying belts.
5. The pellet cooling and drying coupling equipment of claim 4, wherein: the air inlet box, the furnace entering pellet conveying unit, the transfer air box, the furnace discharging pellet conveying unit and the air discharging box are all connected to the same base frame; the inlet end of the air inlet box is arranged on the side wall of the air inlet box, and a plurality of ash falling holes are formed in the bottom wall of the air inlet box at intervals along the length direction of a conveying belt of the furnace pellet conveying unit; an ash deposition hopper is arranged below the ash falling hole.
6. The pellet cooling and drying coupling equipment of claim 1, wherein: the device also comprises a to-be-charged pellet screening and distributing device and a discharged high-temperature pellet distributing device;
the discharging end of the to-be-charged pellet screening and distributing device is connected with the to-be-charged pellet conveying unit in a blanking manner, so that pellets to be charged are conveniently blanked on a conveying belt of the to-be-charged pellet conveying unit at a certain speed;
the discharging end of the discharging high-temperature pellet distributing device is connected with the discharging pellet conveying unit so as to enable the discharging high-temperature pellets to be conveniently dropped on a conveying belt of the discharging pellet conveying unit at a certain speed.
7. The pellet cooling and drying coupling device of claim 1, wherein: the wind power supply unit connected with the inlet end of the air inlet box is a tail gas outlet of the rotary hearth furnace.
8. The pellet cooling and drying coupling equipment of claim 1, wherein: the feeding pellet conveying unit and the discharging pellet conveying unit are parallel and parallel to each other, and the conveying moving directions of the two conveying belts are opposite.
9. The pellet cooling and drying coupling equipment of any one of claims 1-8, wherein: the pellet conveying unit is a belt transmission mechanism and comprises a circle of transmission belt and two transmission tension wheels which are arranged at the inner side of the transmission belt at intervals and tension the transmission belt, and any transmission tension wheel is connected with a driving device; the drive belt is formed as said conveyor belt.
10. The pellet cooling and drying coupling equipment of any one of claims 1-8, wherein: the pellet conveying unit is a chain transmission mechanism and comprises a circle of chain and two transmission wheels which are positioned at the inner side of the chain at intervals and tension the chain, the chain is in transmission connection with the two transmission wheels, any transmission wheel is connected with a driving device, the chain is connected with a plurality of grate plates, and all the grate plates are arranged at intervals along the length direction of the chain and connected to the outer side of the chain; the chain and all the grid plates on the chain form the conveying belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220014535.4U CN216694387U (en) | 2022-01-05 | 2022-01-05 | Pellet cooling and drying coupling equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220014535.4U CN216694387U (en) | 2022-01-05 | 2022-01-05 | Pellet cooling and drying coupling equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216694387U true CN216694387U (en) | 2022-06-07 |
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ID=81818707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220014535.4U Active CN216694387U (en) | 2022-01-05 | 2022-01-05 | Pellet cooling and drying coupling equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216694387U (en) |
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2022
- 2022-01-05 CN CN202220014535.4U patent/CN216694387U/en active Active
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