CN214422670U - High temperature slag waste heat recovery device - Google Patents
High temperature slag waste heat recovery device Download PDFInfo
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- CN214422670U CN214422670U CN202120570709.0U CN202120570709U CN214422670U CN 214422670 U CN214422670 U CN 214422670U CN 202120570709 U CN202120570709 U CN 202120570709U CN 214422670 U CN214422670 U CN 214422670U
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Abstract
The utility model relates to a high temperature slag waste heat recovery device. The device crushes the high-temperature steel slag for a certain time to a certain granularity through the crushing roller, and then cools the high-temperature steel slag for a certain time on a linear heat exchange bed under a certain air quantity and air pressure, so that the obtained cooled steel slag falls into a slag tank for later use; and collecting the high-temperature flue gas subjected to heat exchange through a high-temperature air duct, performing primary dust removal on the high-temperature flue gas, performing heat exchange on the high-temperature flue gas by using a waste heat boiler, performing secondary dust removal on the high-temperature flue gas, and cooling the high-temperature steel slag by using the obtained low-temperature gas again through a blower to complete the recycling of the gas. The utility model has the advantages that can realize the high-efficient recovery of different looks high temperature slag waste heat on the device and the method, the process is simple reliable, investment and operation cost are reasonable, can realize that slag waste heat recovery rate is higher than 75%, and the temperature of high temperature flue gas is greater than 300 ℃, and the low temperature slag temperature who obtains is between 300 ~ 400 ℃, satisfies the requirement of continuous hot stuffiness, has solved the difficult problem that the slag waste heat is difficult to retrieve.
Description
Technical Field
The utility model belongs to the waste disposal utilizes the field, concretely relates to high temperature slag waste heat recovery device, in particular to adopt line formula blast air heat transfer system to retrieve device of slag waste heat.
Background
The steel slag is a main solid waste produced by steel enterprises, about 130kg of steel slag can be produced when 1t of molten steel is produced, the slag discharging temperature is 1400-1600 ℃, and the heat contained in each ton of steel slag is about 60kg of heat released by complete combustion of standard coal.
From the steel industry, the steel slag treatment technology mainly comprises a hot splashing method, a roller method, a tank type hot-disintegration method, a pressure hot-disintegration method and other processes, and the currently newly-built steel slag treatment project mainly comprises the pressure hot-disintegration process. The steel slag treatment processes are that high-temperature slag is properly cooled and then is reprocessed, and the metal in the slag is extracted to be used as a resource. However, in the steel slag treatment process, because of the lack of an economical and feasible technology, the steel slag waste heat is not effectively recovered all the time, so that not only is standard coal wasted every year, but also serious environmental pollution is generated. Therefore, the development of the high-temperature steel slag waste heat recovery technology and method has great significance.
SUMMERY OF THE UTILITY MODEL
In order to achieve the above object, the present invention is directed to a device for recovering waste heat from high temperature steel slag and a method for recovering waste heat based on the device.
Particularly, the utility model discloses at first with high temperature slag broken solidification for certain granularity after on broken bed, adopt line formula blast air heat transfer bed to realize the waste heat recovery of high temperature section (being greater than 400 ℃) slag, the low temperature slag (300 ~ 400 ℃) that obtains is used for the heat vexation, clears up free calcium oxide, the utilization of the tailings of being convenient for.
As further optimization improvement, the utility model discloses a line formula blast air heat transfer system carries out waste heat recovery to high temperature slag, carries out the blast air heat transfer to the high temperature slag after certain granularity from the lower part, and the high temperature flue gas that the temperature that obtains is higher than 300 ℃ is used for the boiler heat transfer, and the low temperature slag between the 300 ~ 400 ℃ that obtains is used for the hot smothering to clear up the free calcium oxide in the slag.
Therefore, the utility model discloses take following technical scheme to realize:
a high temperature steel slag waste heat recovery device, it includes: the crushing bed is provided with a working surface for placing high-temperature steel slag; a crushing roller provided in the crushing bed, the crushing roller being configured to have a rotational movement mode in which the crushing roller performs a crushing operation for the high-temperature steel slag and a linear traveling movement mode in which the crushing roller performs a slag pushing operation for the high-temperature steel slag so that the high-temperature steel slag enters a zigzag passage; the linear heat exchange bed is provided with a working surface for receiving and placing the high-temperature steel slag from the zigzag channel; a blower configured to be capable of supplying a cooling gas, which performs a cooling operation for the high-temperature steel slag to cool the high-temperature steel slag to low-temperature steel slag and which is converted into a high-temperature gas after the cooling operation, to the wire-type heat exchange bed through a blowing duct; a high temperature air duct configured to convey the high temperature gas from the inline heat exchange bed back to the blower; a slag pot configured to hold the low temperature steel slag from the inline heat exchange bed.
Further, the apparatus further comprises a baffle disposed at a distance from the working surface of the inline heat exchange bed, the baffle configured to perform a leveling operation on the high temperature steel slag on the working surface of the inline heat exchange bed.
Further, the distance is adjustable between 300 mm and 500mm, and the leveling operation can level the thickness of the slag layer of the high-temperature steel slag to 300 mm to 500 mm.
Further, the leveling operation is performed before the cooling operation.
Further, the cooling operation is specifically to perform heat convection between the gas and the high-temperature steel slag.
Further, the high-temperature gas is conveyed back to the blower through the high-temperature air duct and is converted into low-temperature gas through primary dust removal treatment, heat exchange treatment and secondary dust removal treatment in sequence.
Furthermore, the high-temperature air duct and the zigzag channel are both provided with heat insulation materials, and the baffle is made of high-temperature-resistant and wear-resistant materials.
Further, the moving speed of the linear heat exchange bed is adjustable between 0.5m/min and 1.5 m/min.
Further, the working face of the wire heat exchange bed is at least 35 meters in length.
Furthermore, the bottom of the linear heat exchange bed is a ventilated grate plate consisting of parallel grates, and the gas from the blast air duct flows through the grate plate and then enters the linear heat exchange bed.
Furthermore, the slag tank is arranged at the discharge end of the linear heat exchange bed, and a closed cover at the discharge end is in contact with the low-temperature steel slag through a steel brush, so that the smoke is prevented from overflowing.
Further, the blast volume of the blower is 300000-400000 m3The wind pressure is 10-15 kPa.
Further, the crushing roller can be in a rotational movement mode, a linear travel movement mode, or both.
Further, the rotational motion pattern includes a forward rotation pattern and a reverse rotation pattern.
Further, the linear walking motion mode includes a forward linear walking motion mode and a backward linear walking motion mode.
The utility model discloses can realize the high-efficient recovery of high temperature slag waste heat, heat recovery efficiency is greater than 75%, can also realize gaseous cyclic utilization simultaneously, avoids the flue gas to arrange outward.
The utility model discloses a waste heat recovery device can also realize seamless butt joint with current mainstream slag processing apparatus (have pressure hot smothering technology if), and has simple process, and investment and operation cost are reasonable, and the accident rate is low, advantages such as heat recovery efficiency height.
Drawings
Fig. 1 is a schematic structural view of a high-temperature steel slag waste heat recovery device provided by the present invention;
fig. 2 is a schematic view of a specific process of the operation process of the high-temperature steel slag waste heat recovery device provided by the utility model.
Reference numerals:
the device comprises a crushing bed 1, crushing rollers 2, high-temperature steel slag 3, a high-temperature air duct 4, a zigzag channel 5, a baffle 6, a linear heat exchange bed 7, an air blower 8, an air blowing air duct 9 and a slag pot 10.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following describes the high temperature steel slag waste heat recovery device provided by the present invention with reference to fig. 1, as shown in fig. 1, the high temperature steel slag waste heat recovery device includes: the device comprises a crushing bed 1, a crushing roller 2, a high-temperature air duct 4, a zigzag channel 5, a baffle 6, a linear heat exchange bed 7, a blower 8, an air blowing duct 9 and a slag pot 10.
Wherein, the crushing bed 1 is provided with a working surface for placing the high-temperature steel slag 3; a crushing roller 2 is provided in the crushing bed 1, the crushing roller 2 being configured to have a rotational motion mode in which the crushing roller 2 performs a crushing operation for the high-temperature steel slag 3 and a linear travel motion mode in which the crushing roller 2 performs a slag pushing operation for the high-temperature steel slag 3 so that the high-temperature steel slag 3 enters the zigzag passage 5; the linear heat exchange bed 7 is provided with a working surface for receiving and placing the high-temperature steel slag 3 from the zigzag channel 5; the blower 8 is configured to be able to deliver a cooling gas, which performs a cooling operation for the high-temperature steel slag 3 to cool the high-temperature steel slag 3 to low-temperature steel slag and which is converted into a high-temperature gas after the cooling operation, to the wire-type heat exchange bed 7 through the blower duct 9; the high temperature air duct 4 is configured to convey high temperature gas from the linear heat exchange bed 7 back to the blower 8; the slag pot 10 is configured to hold low temperature steel slag from the inline heat exchange bed 7.
The high-temperature air duct 4 is arranged above the crushing bed 1 and is used for recovering high-temperature flue gas generated when the high-temperature steel slag 3 passes through the zigzag channel 5; the crushing roller 2 only performs linear walking motion in the slag pushing process, does not perform rotary motion, and pushes the high-temperature steel slag 3 to the inlet of the zigzag channel 5; the crushing bed 1 is connected with the linear heat exchange bed 7 through the zigzag channel 5, and the zigzag channel 5 mainly completes the movement of the high-temperature steel slag 3 from the crushing bed 1 to the linear heat exchange bed 7; the high-temperature air duct 4 arranged on the online heat exchange bed 7 is mainly used for recovering high-temperature flue gas generated in the cooling process of the high-temperature steel slag 3 on the online heat exchange bed 7; the distance between the baffle 6 arranged on the online heat exchange bed 7 and the online heat exchange bed 7 is adjustable between 300 and 500mm, and the method is mainly used for leveling the thickness of the steel slag to 300 to 500 mm; high-temperature flue gas in the high-temperature air duct 4 is subjected to primary dust removal, heat exchange and secondary dust removal, and the obtained low-temperature gas is blown into the linear heat exchange bed 7 through the blower 8 again to realize gas circulation, and no flue gas is discharged in the whole process; and the slag tank 10 is positioned at the discharge end of the linear heat exchange bed 7 and is used for containing the low-temperature steel slag after heat exchange.
The crushing roller 2 has two types of movement, namely, rotation and linear travel, which can be performed simultaneously or not simultaneously. Wherein, the rotation mode of the crushing roller 2 comprises two rotation modes of forward rotation and reverse rotation, and the straight line walking comprises two straight line walking modes of forward movement and backward movement. Wherein, the high-temperature air duct 4 and the zigzag channel 5 are both provided with heat insulation materials. Wherein, the high temperature air duct 4 is respectively positioned above the zigzag channel 5 and at the front end high temperature section of the linear heat exchange bed 7. Wherein, the baffle 6 is made of high temperature resistant and wear resistant material. The joint of the zigzag channel 5 and the linear heat exchange bed 7 is a feeding end of the linear heat exchange bed 7, one end of the slag tank 10 is a discharging end of the linear heat exchange bed 7, and the high-temperature steel slag 3 crushed to a certain granularity moves to the discharging end from the feeding end of the linear heat exchange bed 7 to finish cooling of the high-temperature steel slag 3 and rising of gas temperature. Wherein the moving speed of the linear heat exchange bed 7 is adjustable between 0.5m/min and 1.5 m/min. Wherein the effective length of the linear heat exchange bed 7 is 35 meters. Wherein, the grate plate which can ventilate and is composed of parallel grates is arranged at the bottom of the linear heat exchange bed 7. Wherein, the closed cover of the discharge end of the linear heat exchange bed 7 is contacted with the low-temperature steel slag through a steel brush, so as to avoid the overflow of the flue gas. Wherein, the design wind pressure of the blower 8 is more than 10 kPa.
Based on the utility model provides an above-mentioned high temperature steel slag waste heat recovery device carries out high temperature steel slag waste heat recovery's operation technology includes: firstly, placing high-temperature steel slag 3 on a working surface of a crushing bed 1; secondly, the crushing roller 2 carries out crushing operation on the high-temperature steel slag 3 on the working surface; thirdly, the crushing roller 2 pushes the high-temperature steel slag 3 on the working surface; fourthly, the high-temperature steel slag 3 moves forwards along with the line type heat exchange bed 7; fifthly, the blower 8 sends cooling gas to the linear heat exchange bed 7 to implement cooling operation aiming at the high-temperature steel slag 3 so as to obtain low-temperature steel slag; step six: the low temperature steel slag is conveyed to the slag pot 10 for subsequent hot sealing.
Based on the specific steps of the method, the practical application thereof can be as follows:
(1) pouring 25t of semi-solid high-temperature steel slag with the temperature of 1300 ℃ on a crushing bed through a slag pot tipping machine.
(2) The blower 8 is turned on, and the air volume is 320000m3H, the wind pressure is 11 kPa; and operating the crushing roller 2 to crush the high-temperature steel slag 3 for 8min, wherein the mass percentage of the steel slag with the granularity of less than 200mm is 77.3%.
(3) After the crushing is finished, the crushing roller 2 pushes away the sediment operation in 3 minutes, pushes away the sediment interval time for 8min every time, and total pushes away the sediment time for 24min, makes 3 turn by turn of high temperature steel slag pass through zigzag passageway 5 and get into line formula heat exchange bed 7.
(4) The high-temperature steel slag 3 moves forwards for 44min along with the linear heat exchange bed 7 at the speed of 0.8m/min, and the thickness of the high-temperature steel slag 3 is leveled to 350mm under the action of the baffle 6.
(5) And after the temperature of the high-temperature steel slag 3 is cooled to 380 ℃, the high-temperature steel slag enters the slag tank 10 at the discharge end of the linear heat exchange bed 7 for subsequent hot disintegration.
(6) In the process that the high-temperature steel slag 3 moves forwards, low-temperature gas is blown in from the bottom of the linear heat exchange bed 7, contacts with the high-temperature steel slag 3 and penetrates through a slag layer to complete heat convection, the temperature of the obtained high-temperature flue gas is 365 ℃, and then the high-temperature flue gas is collected through the high-temperature air duct 4.
(7) The temperature of low-temperature gas obtained after the high-temperature flue gas is subjected to primary dust removal, heat exchange and secondary dust removal is 162 ℃, air is blown by the air blower 8, and the high-temperature gas is used for cooling and heat exchange of the high-temperature steel slag 3 again through the air blowing duct 9, so that gas circulation is realized, and no flue gas is discharged in the whole process.
The waste heat recovery is carried out on the high-temperature steel slag 3 by using the method provided by the utility model, and the waste heat recovery rate of the steel slag in the whole process is 76.63%; the temperature of the obtained high-temperature flue gas is 365 ℃, and the heat exchange conditions of a subsequent boiler are met; the temperature of the low-temperature gas is 162 ℃, and the recycling condition is met; the temperature of the low-temperature steel slag is 380 ℃, and the subsequent hot stuffiness condition is met; the whole process has no smoke discharge.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are provided only for the purpose of illustration, and not for the purpose of limitation, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also belong to the scope of the present invention.
Claims (16)
1. The utility model provides a high temperature slag waste heat recovery device which characterized in that, the device includes:
a crushing bed (1), wherein the crushing bed (1) is provided with a working surface for placing high-temperature steel slag (3);
a crushing roller (2) provided in the crushing bed (1), the crushing roller (2) being configured to have a rotational movement mode in which the crushing roller (2) performs a crushing operation for the high temperature steel slag (3) and a linear traveling movement mode in which the crushing roller (2) performs a slag pushing operation for the high temperature steel slag (3) so that the high temperature steel slag (3) enters a zigzag passage (5);
the inline heat exchange bed (7) is provided with a working surface for receiving and placing the high-temperature steel slag (3) from the zigzag channel (5);
a blower (8), the blower (8) being configured to be able to supply a cooling gas, which performs a cooling operation for the high-temperature steel slag (3) to cool the high-temperature steel slag (3) to low-temperature steel slag and which is converted into a high-temperature gas after the cooling operation, to the inline heat exchange bed (7) through a blowing duct (9);
a high temperature air duct (4), the high temperature air duct (4) being configured to convey the high temperature gas from the inline heat exchange bed (7) back to the blower (8);
a slag pot (10), the slag pot (10) being configured to contain the low temperature steel slag from the inline heat exchange bed (7).
2. The device for recovering the residual heat from the high-temperature steel slag as claimed in claim 1, wherein the device further comprises a baffle plate (6), the baffle plate (6) is arranged to keep a distance with the working surface of the wire-type heat exchange bed (7), and the baffle plate (6) is configured to perform a leveling operation on the high-temperature steel slag (3) on the working surface of the wire-type heat exchange bed (7).
3. The device for recycling the waste heat of the high-temperature steel slag as claimed in claim 2, wherein the distance is adjustable between 300 and 500mm, and the leveling operation can level the thickness of the slag layer of the high-temperature steel slag (3) to between 300 and 500 mm.
4. The apparatus for recycling waste heat from steel slag having high temperature as claimed in claim 2 or 3, wherein the leveling operation is performed before the cooling operation.
5. The device for recycling the waste heat of the high-temperature steel slag as claimed in claim 1, wherein the cooling operation is specifically a heat convection between the gas and the high-temperature steel slag (3).
6. The device for recycling the waste heat of the high-temperature steel slag according to claim 1, wherein the high-temperature gas is transferred back to the blower (8) through the high-temperature air duct (4) and is converted into the low-temperature gas through a primary dust removal treatment, a heat exchange treatment and a secondary dust removal treatment in sequence.
7. The device for recycling the waste heat of the high-temperature steel slag according to claim 1, wherein the high-temperature air duct (4) and the zigzag channel (5) are both provided with heat insulation materials.
8. The device for recycling the waste heat of the high-temperature steel slag as claimed in claim 2 or 3, wherein the baffle (6) is made of a high-temperature-resistant and wear-resistant material.
9. A high temperature steel slag waste heat recovery device according to claim 1, wherein the moving speed of the linear heat exchange bed (7) is adjustable between 0.5m/min and 1.5 m/min.
10. A high temperature steel slag waste heat recovery device according to claim 1, wherein the length of the working surface of the wire-type heat exchange bed (7) is at least 35 m.
11. The device for recovering the waste heat from the high-temperature steel slag according to the claim 1, wherein the grate plate made of parallel grates is arranged at the bottom of the linear heat exchange bed (7) in a ventilating manner, and the gas from the blast air duct (9) flows through the grate plate and enters the linear heat exchange bed (7).
12. The device for recovering the waste heat of the high-temperature steel slag as defined in claim 1, wherein the slag tank (10) is arranged at a discharge end of the linear heat exchange bed (7), and a closed cover at the discharge end is in contact with the low-temperature steel slag through a steel brush to prevent the flue gas from overflowing.
13. The device for recovering the waste heat from the high-temperature steel slag as claimed in claim 1, wherein the blowing amount of the blower (8) is 300000-400000 m3The wind pressure is 10-15 kPa.
14. The device for recycling the waste heat of the high-temperature steel slag according to the claim 1, wherein the crushing roller (2) can be in a rotating motion mode, a linear walking motion mode or a rotating motion mode and a linear walking motion mode.
15. The device for recycling waste heat from steel slag with high temperature as claimed in claim 14, wherein the rotation mode comprises a forward rotation mode and a reverse rotation mode.
16. The device for recycling waste heat from steel slag with high temperature as claimed in claim 14, wherein the linear traveling mode comprises a forward linear traveling mode and a backward linear traveling mode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120570709.0U CN214422670U (en) | 2021-03-19 | 2021-03-19 | High temperature slag waste heat recovery device |
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| CN202120570709.0U CN214422670U (en) | 2021-03-19 | 2021-03-19 | High temperature slag waste heat recovery device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853013A (en) * | 2021-03-19 | 2021-05-28 | 中冶节能环保有限责任公司 | High-temperature steel slag waste heat recovery device and waste heat recovery method based on same |
| CN114854911A (en) * | 2022-04-22 | 2022-08-05 | 晏灏 | Device and method for utilizing heat energy of high-temperature steel slag |
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2021
- 2021-03-19 CN CN202120570709.0U patent/CN214422670U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112853013A (en) * | 2021-03-19 | 2021-05-28 | 中冶节能环保有限责任公司 | High-temperature steel slag waste heat recovery device and waste heat recovery method based on same |
| CN114854911A (en) * | 2022-04-22 | 2022-08-05 | 晏灏 | Device and method for utilizing heat energy of high-temperature steel slag |
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