CN217922243U - Horizontal spiral propulsion thermal reaction device - Google Patents
Horizontal spiral propulsion thermal reaction device Download PDFInfo
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- CN217922243U CN217922243U CN202222221735.XU CN202222221735U CN217922243U CN 217922243 U CN217922243 U CN 217922243U CN 202222221735 U CN202222221735 U CN 202222221735U CN 217922243 U CN217922243 U CN 217922243U
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Abstract
The utility model discloses a horizontal spiral propulsion thermal reaction unit, include: an inner cylinder body with a feed inlet and a discharge outlet; an outer cylinder; a burner having a flame outlet; a transmission device; the inner wall of the inner barrel is provided with a lifting blade, the inner barrel is connected with a connecting shaft, the connecting shaft is connected with a spiral sheet, and the lifting blade is connected to the inner wall of the inner barrel; the transmission device is connected with the inner cylinder body and can drive the inner cylinder body to rotate along the axis of the inner cylinder body. The inner cylinder body and the horizontal ground have a certain inclination angle, so that when the inner cylinder body rotates, materials entering from the feeding hole can move towards the discharging hole; the inner cylinder body is positioned in the outer cylinder body, and an annular cavity is formed between the outer cylinder body and the inner cylinder body; the fire outlet of the burner is connected with the outer cylinder and extends into the annular cavity. The device can carry out muffle type heat treatment on the material, and prevents the flue gas containing sulfur and nitrogen generated by the fuel from contacting the material during heating to form sulfur-containing and nitrogen-containing compound impurities.
Description
Technical Field
The utility model belongs to the technical field of the thermal reaction unit technique and specifically relates to a horizontal spiral propulsion thermal reaction unit.
Background
The red mud is tailings generated in the production process of aluminum industry, has relatively complex mineral composition and mainly contains Al 2 O 3 、Fe 2 O 3 、SiO 2 And the like, and generally exhibit strong alkaline and corrosive properties. Typically, on average, 1 ton of alumina is produced, with an attendant production of 1.0-2.0 tons of red mud.
The red mud is rich in iron, aluminum, calcium, silicon, titanium, sodium, nickel, manganese, chromium, vanadium, scandium, yttrium and lanthanide rare earth elements, can be changed into valuables by comprehensive development and utilization, and becomes beneficial, and particularly under the condition that mineral resources are increasingly lacked, the recovery of valuable metals in the red mud is increasingly important. How to develop and utilize the red mud which sleeps for many years and has a remarkable quantity really realizes the modern production without tail, waste and secondary pollution, achieves the purpose of promoting the comprehensive treatment of mine environment, is an important subject which is commonly concerned by China and countries in the world, and has very important practical significance in developing and utilizing the red mud.
In the prior art, iron oxide in red mud is reduced into magnetic ferroferric oxide through a high-temperature reduction reaction, and then the magnetic ferroferric oxide is separated through a magnetic separator to obtain magnetic fine iron powder. However, in the existing treatment process, the red mud and the reaction reagent are placed in the rotary kiln, and the flame generated by the burner is used for internal heating, the existing burner is generally pulverized coal, the flame generated by the burner can generate flue gas containing sulfur dioxide and nitrogen dioxide, and the flue gas can generate sulfur-containing and nitrogen-containing compounds after contacting with mineral aggregates in the red mud, so that the separation difficulty of various subsequent mineral aggregates is increased, and the recovery rate of metal mineral aggregates is reduced.
Therefore, it is necessary to provide a thermal reaction device which can be used for the thermal reaction pretreatment of the red mud and does not cause smoke pollution to the red mud mineral aggregate.
SUMMERY OF THE UTILITY MODEL
In order to solve the prior art problems, the utility model provides a horizontal spiral propulsion thermal reaction device.
In order to realize the purpose, the utility model discloses a technical scheme is:
the utility model provides a horizontal spiral impels thermal reaction unit which characterized in that includes:
an inner cylinder body with a feed inlet and a discharge outlet;
an outer cylinder;
a burner having a flame outlet;
a transmission device;
a material raising plate;
the inner wall of the inner cylinder body is provided with a lifting plate, and the lifting plate is connected to the inner wall of the inner cylinder body;
the transmission device is connected with the inner cylinder body and can drive the inner cylinder body to rotate along the axis of the inner cylinder body;
the inner cylinder body is positioned inside the outer cylinder body, and an annular cavity is formed between the outer cylinder body and the inner cylinder body;
and the fire outlet of the burner is connected with the outer cylinder and extends into the annular cavity.
Preferably, the inner cylinder body comprises a preheating section and a high-temperature section, the temperature in the preheating section cylinder body can reach 600-1000 ℃, and the temperature in the high-temperature section cylinder body can reach 1200-1400 ℃.
Preferably, the inner wall of the outer cylinder body is provided with a refractory material.
Preferably, the refractory material is 1260 fiber modules.
Preferably, the diameter of the inner cylinder body is 2-2.5 meters, and the length of the inner cylinder body is 20-25 meters.
Preferably, the preheating section is an inner area of the inner cylinder, wherein one end of the inner cylinder, which is close to the feed inlet, extends along the axis of the inner cylinder for 4 meters; the high-temperature section is an inner area of the inner cylinder except the preheating section.
Preferably, the combustor includes preheating combustor and high temperature combustor, preheating combustor is used for heating the preheating section, the high temperature combustor is used for heating the high temperature section, makes the preheating section temperature reach 600-1000 degrees centigrade, makes the high temperature section temperature reach 1200-1400 degrees centigrade.
Preferably, the number of the preheating burners is at least 1, and the number of the high-temperature burners is more than 2.
Preferably, the horizontal screw propulsion thermal reaction device is characterized by further comprising:
a connecting shaft;
a spiral sheet;
a second motor;
the connecting shaft is positioned in the inner cylinder body and is movably connected with two ends of the inner cylinder body;
the spiral piece is arranged around the connecting shaft;
one end of the connecting shaft extends out of the outer cylinder body and is connected with the second motor;
the second motor is arranged at one end of the outer cylinder body and can drive the connecting shaft to rotate.
Preferably, the horizontal spiral propelling thermal reaction device is characterized in that,
further comprising:
a smoking room;
the smoke chamber is communicated with the annular cavity and used for discharging smoke generated by combustion.
Preferably, the discharge of the inner cylinder body can be connected with the feed inlet of the next reaction device.
The beneficial effects of the utility model are embodied in:
the utility model provides a pair of horizontal spiral propulsion thermal reaction unit separates flame formula heat treatment to the material, when having effectively prevented the material heating, and the flue gas that contains sulphur, nitrogen that the burning produced contacts with the material, causes the pollution to the material, forms sulphur, nitrogenous compound impurity for all kinds of metals separate more easily in the follow-up red mud mineral aggregate, improve the mineral aggregate rate of recovery.
Meanwhile, the existing thermal reaction device needs the materials to enter the next stage after passing through the cooling area, if the materials are subsequently heated, a large amount of energy needs to be consumed to improve the temperature of the materials, the process only needs a horizontal spiral propulsion thermal reaction device to preheat and thermally treat the materials at high temperature, the treated mineral aggregate does not need to be cooled and can directly flow into the next reaction device to carry out high-temperature reaction, the mineral aggregate treatment time is reduced, and the energy consumption of the subsequent red mud treatment is greatly reduced.
Description of the drawings:
FIG. 1 is a schematic structural view of a horizontal screw propulsion thermal reaction apparatus;
FIG. 2 is a partially enlarged schematic view a of a cross-sectional view of the inside of a horizontal screw propulsion thermal reaction apparatus;
FIG. 3 is a schematic cross-sectional view of a horizontal screw-propulsion thermal reaction apparatus;
FIG. 4 is a partially enlarged schematic view b of a cross-sectional view of the inside of a horizontal screw propulsion thermal reaction apparatus;
FIG. 5 is a partially enlarged view of a discharge port of a horizontal screw propulsion thermal reaction apparatus;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely 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 all belong to the protection scope of the present invention.
Referring to fig. 1-5, the present invention provides the following embodiments:
example 1
A horizontal screw propulsion thermal reaction device is characterized by comprising:
an inner cylinder (1) having a feed inlet (101) and a discharge outlet (102);
an outer cylinder (2);
a burner (3) having a flame outlet (301);
a transmission (4);
a material raising plate (5);
the material raising plate (5) is connected to the inner wall of the inner cylinder (1);
the transmission device (4) is connected with the inner cylinder body (1) and can drive the inner cylinder body (1) to rotate along the axis of the inner cylinder body (1);
the inner cylinder body (1) is positioned in the outer cylinder body (2), and an annular cavity (6) is formed between the outer cylinder body (2) and the inner cylinder body (1);
and a fire outlet (301) of the burner (3) is connected with the outer cylinder (2) and extends into the annular cavity (6).
The existing heating mode of the thermal reaction kettle generally comprises the steps of firstly heating water or oil and other media by using a boiler heating mode, an electric heating mode and the like, then injecting the heated water or oil and other media into a jacket of the reaction kettle, and enabling reactants of the reaction kettle to reach the required temperature through heat transfer, wherein the highest temperature which can be reached by the media is limited (not more than 600 ℃). Therefore, when the reactant is required to reach the temperature of more than 1200 ℃, the reactant is required to be placed in the rotary kiln to be heated by flame. The heating mode of the existing rotary kiln is usually heating in the kiln, and flame generated by a burner is directly sprayed into the kiln, so that gases such as sulfur dioxide and nitrogen dioxide generated after fuel combustion can be contacted with reactants, the reactants are polluted, and the final reaction result cannot be expected.
The embodiment provides a horizontal spiral propulsion thermal reaction device, constitute by interior barrel (1) and outer barrel (2), and form annular cavity (6) between interior and exterior barrel (2), and set up fire outlet (301) of combustor (3) and extend into annular cavity (6) from outer barrel (2), when needing to the reactant heating in the barrel, the flame that combustor (3) produced can spout and heat interior barrel (1) in annular cavity (6), interior barrel (1) makes the reactant reach required temperature through the mode of heat transfer, simultaneously, interior barrel (1) can be driven along its axle center rotation by transmission (4), the inside lifting blade (5) of barrel can drive the reactant rotation, when the device installation was used, the one end position that makes the device feed inlet place is higher than the one end that the device discharge gate place, make the reactant receive the influence of gravity, can move gradually to discharge gate (102), and the flue gas that fuel burning produced then discharges from reaction device along annular cavity (6), effectively avoided the flue gas to cause the pollution, the realization is separated the flame and is heated reaction device.
In another case, the red mud needs to undergo multiple material extractions for the purpose of harmless (no harmful substance emission) treatment, and the process flow is long. In a longer process flow, each process link needs to face uncertain factors of manual access, all-weather operation and shift switching and the like, namely, after different teams and groups, different material batches and the like are processed by the same process, the output consistency is not high. This poses a challenge to standardize the mass production of the process. The embodiment of this application has avoided flame burning flue gas to participate in the reaction on the one hand by the mode that adopts the heating of flame urceolus, improves hot reaction temperature link and heat supply, and on the other hand still provides for preheating the more high-efficient and effectual controllability of medium heating mode. The adjustment behavior can occur under the intervention conditions of batch entry, shift switching and the like of different materials, and guarantee is provided for effective production of the process link. For example, the water content of the inlet materials is different and may change several times in a day, and if the thermal reaction is performed by heating at the same temperature, the materials may be hardened, which seriously affects the thermal reaction effect.
Preferably, the horizontal screw propulsion thermal reaction device is characterized by further comprising:
a connecting shaft (10);
a spiral sheet (11);
a second motor (12);
the connecting shaft (10) is positioned in the inner cylinder body and is movably connected with two ends of the inner cylinder body;
the spiral sheet (11) is arranged around the connecting shaft (10);
one end of the connecting shaft (10) extends out of the outer cylinder body and is connected with the second motor (12)
Connecting;
the second motor (12) is arranged at one end of the outer cylinder body and can drive the connecting shaft (10) to rotate.
The connecting shaft and the spiral piece are arranged in the inner barrel body, the connecting shaft and the spiral piece are driven to rotate through the second motor arranged outside, the material falling above the lifting plate can be driven to move from the feeding hole to the discharging hole at a high speed by combining the spiral piece of the lifting plate, and the transfer efficiency of the material is effectively improved.
Example 2
In this example, as a further improvement of the technical means of example 1, the present invention is characterized in that,
the inner cylinder (1) comprises a preheating section (7) and a high-temperature section (8), wherein the preheating section (7) enables the temperature in the cylinder to reach 600-1000 ℃, and the high-temperature section (8) enables the temperature in the cylinder to reach 1200-1400 ℃.
Considering that the heat treatment of the red mud includes a preheating stage and a high-temperature reduction stage, in this embodiment, the inner cylinder (1) is divided into the preheating section (7) and the high-temperature section (8), so that the temperature in the cylinder of the preheating section (7) can reach 600-1000 ℃, and the temperature in the cylinder of the high-temperature section (8) can reach 1200-1400 ℃, so that the temperature of the red mud mineral aggregate can reach more than 600 ℃ in the preheating stage and more than 1200 ℃ in the high-temperature reduction stage.
Through setting up preheating section and high temperature section, the adjustable scope of preheating section temperature sets up great (high low temperature span 400 degrees centigrade), can carry out the adaptability adjustment to the material of different parameter of different batches, avoids the material to harden or heat insufficient problem under same temperature parameter to ensure that the material evenly heaies up, the quick even evaporation of steam, provide the material of being heated evenly, abundant for the thermal reaction of follow-up high temperature section, the easy compounding upset of granule dispersion.
Meanwhile, the existing reaction kettle usually needs the material to enter the next stage after passing through the cooling zone, and if the material is subsequently heated, a large amount of energy needs to be consumed to improve the temperature of the material.
Example 3
In this embodiment, as a further improvement of the technical means of embodiment 2, the improvement is characterized in that,
the inner wall of the outer cylinder body (2) is provided with a refractory material.
Considering that the barrel of the reaction device is usually made of metal and has high thermal conductivity, after flame generated by the burner (3) enters the annular cavity (6), the outer barrel (2) can also absorb heat, the reaction device only needs the inner barrel (1) to absorb heat and transmit the heat to reactants, the outer barrel (2) is directly contacted with the flame to cause energy waste, and the outer barrel (2) has overhigh temperature and can also generate potential safety hazards. Therefore, the embodiment arranges a layer of refractory material on the inner side of the outer cylinder (2), effectively reduces the heat transfer to the outer cylinder (2), reduces the energy loss in the heating process of the reaction device, and improves the safety of the reaction device.
Preferably, the refractory material is 1260 fiber modules.
1260 fibre module is selected as refractory material in this embodiment, and its thermal conductivity and thermal capacity are low, and adiabatic and energy-conserving effect are showing, and have the advantage of low unit weight, have alleviateed the steel construction load of device greatly when actual installation, have reduced the consumption of steel construction, have reduced engineering cost to a certain extent.
Example 4
In this example, as a further improvement of the technical means of example 3, the present invention is characterized in that,
the diameter of the inner cylinder body (1) is 2-2.5 meters, and the length is 20-25 meters;
the preheating section (7) is an inner area of the inner cylinder (1), wherein one end of the inner cylinder (1) close to the feed inlet (101) extends for 4 meters along the axis of the inner cylinder (1); the high-temperature section (8) is the inner area of the inner cylinder body (1) except the preheating section (7).
In the embodiment, the size of the device is further set, the diameter of the inner cylinder (1) is set to be 2-2.5 meters, the length is set to be 20-25 meters, so that the device can meet the treatment capacity of treating 1000 tons of red mud per day, and meanwhile, the first 4 meters area of the inner cylinder (1) is set to be a preheating section (7), and in addition, a high-temperature section (8) is set to meet the requirements of reaction time and temperature of red mud heat treatment.
Example 5
In this example, as a further improvement of the technical means of example 4, the present invention is characterized in that,
the combustor (3) is including preheating combustor (3) and high temperature combustor (3), preheat combustor (3) and be used for heating preheating section (7), high temperature combustor (3) are used for heating high temperature section (8), make preheating section (7) temperature reach 600-1000 degrees centigrade, make high temperature section (8) temperature reach 1200-1400 degrees centigrade.
Considering that the temperature of the high-temperature section (8) of the device needs to reach 1200-1400 ℃, and the temperature of the preheating section (7) only needs to reach 600-1000 ℃, therefore, in the embodiment, the preheating burner (3) is arranged at the preheating section (7) of the device, the high-temperature burner (3) is arranged at the high-temperature section (8), the power of the preheating burner (3) can be set to be smaller than that of the high-temperature burner (3) or the preheating burner (3) is set to be in intermittent combustion to realize that the heat supply amount of the preheating section (7) is smaller than that of the high-temperature section (8), so that the temperature of the preheating section (7) is kept at 600-1000 ℃, and the temperature of the high-temperature section (8) reaches 1200-1400 ℃.
Preferably, the number of the preheating burners (3) is at least 1, and the number of the high-temperature burners (3) is more than 2.
The interior barrel (1) length of considering reaction unit is great, has reached more than 20 meters, when heating it from the barrel side, the flame that single combustor (3) produced can't cover high temperature section (8), can lead to interior barrel (1) to be heated unevenly, the different position temperature of barrel is different, therefore this embodiment sets up to preheat combustor (3) and is 1 at least, high temperature combustor (3) are more than 2, guaranteed the homogeneity of combustor (3) internal barrel (1) heating. The multiple combustion engines can also be configured for independent temperature control, i.e., the output power of each combustion engine can be independently configured. The use of this embodiment can make the inner tube form the temperature ladder from the feeding to the ejection of compact, and each temperature ladder difference in temperature is not big, and the combustor that is located the interlude can be used for providing the temperature switching of preheating section to high temperature section, and when the material humidity is too high to be unsuitable quick high temperature preheating at the entrance, the temperature that preheating section used is lower usually, if directly get into high temperature section, also can have the condition of preheating inadequately. By means of the independently configured multi-burner operating concept, the intermediate burner can achieve a transition from the preheating zone to the high-temperature zone, which essentially can also be understood as a functionally adjustable configuration of the preheating and high-temperature zone of the intermediate zone. It should be noted that when the interlude combustor is adjusted for the compensation that the material heating of preheating section is not enough, the power of high temperature section combustor should improve to the high temperature value side of high temperature section relatively to the insufficient reaction of high temperature section after the adjustment of compensation interlude combustor power problem. In practice, the effect is obvious, so that the influence of shift change and material batch parameters is solved, the discharge consistency of the whole process is high, and the industrial effect of mass production is obvious.
Example 6
In this example, as a further improvement of the technical means of examples 1 to 5, the present invention is characterized in that,
is characterized in that the utility model is characterized in that,
further comprising:
a smoking chamber (9);
the smoke chamber is communicated with the annular cavity (6) and is used for discharging smoke generated by combustion.
The embodiment is provided with the smoke chamber communicated with the annular cavity (6), can be used for accommodating smoke generated by combustion products, and can be used for purifying and then discharging the smoke to reduce pollution.
In some embodiments, an exhaust fan is disposed at one end of the smoking chamber for drawing water vapor generated by combustion away from the smoke to prevent the water vapor from lowering the reaction temperature in the annular cavity.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "inner", "outer", and the like indicate an orientation or positional relationship.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "mounted," "connected," and "assembled" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally 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.
In describing embodiments of the invention, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
In the description of the embodiments of the present invention, it should be understood that "-" and "-" indicate the same range as two numerical values, and the range includes the endpoints. For example, "A-B" means a range greater than or equal to A and less than or equal to B. "A to B" means a range of not less than A and not more than B.
In the description of the embodiments of the present invention, the term "and/or" herein is only one kind of association relationship describing the associated object, and means that there may be three kinds of relationships, for example, a and/or B, and may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A horizontal screw propulsion thermal reaction device is characterized by comprising:
an inner cylinder body with a feed inlet and a discharge outlet;
an outer cylinder;
a burner having a flame outlet;
a transmission device;
a material raising plate;
the material raising plate is connected to the inner wall of the inner cylinder;
the transmission device is connected with the inner cylinder body and can drive the inner cylinder body to rotate along the axis of the inner cylinder body;
the inner cylinder body is positioned in the outer cylinder body, and an annular cavity is formed between the outer cylinder body and the inner cylinder body;
and the fire outlet of the burner is connected with the outer cylinder and extends into the annular cavity.
2. The horizontal screw propulsion thermal reaction device according to claim 1,
the inner cylinder body comprises a preheating section and a high-temperature section, wherein the preheating section enables the temperature in the cylinder body to reach 600-1000 ℃, and the high-temperature section enables the temperature in the cylinder body to reach 1200-1400 ℃.
3. The horizontal screw propulsion thermal reaction device according to claim 2,
and the inner wall of the outer cylinder body is provided with a refractory material.
4. The horizontal screw propulsion thermal reaction device according to claim 3,
the refractory material is 1260 fibre modules.
5. The horizontal screw propulsion thermal reaction unit according to claim 2, wherein the inner cylinder has a diameter of 2 to 2.5 m and a length of 20 to 25 m.
6. The horizontal screw propulsion thermal reaction device according to claim 5,
the preheating section is an inner area of the inner cylinder, which extends for 4 meters from one end of the inner cylinder close to the feed inlet along the axis of the inner cylinder; the high-temperature section is an inner area of the inner cylinder body except the preheating section.
7. The horizontal screw propulsion thermal reaction device according to claim 6,
the combustor comprises a preheating combustor and a high-temperature combustor, the preheating combustor is used for heating the preheating section, and the high-temperature combustor is used for heating the high-temperature section, so that the temperature of the preheating section reaches 600-1000 ℃, and the temperature of the high-temperature section reaches 1200-1400 ℃.
8. The horizontal screw propulsion thermal reaction device according to claim 7,
the number of the preheating burners is at least 1, and the number of the high-temperature burners is more than 2.
9. The horizontal screw propulsion thermal reaction device according to claim 1, further comprising:
a connecting shaft;
a spiral sheet;
a second motor;
the connecting shaft is positioned in the inner cylinder body and movably connected with two ends of the inner cylinder body;
the spiral piece is arranged around the connecting shaft;
one end of the connecting shaft extends out of the outer cylinder body and is connected with the second motor;
the second motor is arranged at one end of the outer cylinder body and can drive the connecting shaft to rotate.
10. The horizontal screw-propelled thermal reaction apparatus according to any one of claims 1 to 9, further comprising:
a smoking chamber;
the smoking chamber is in communication with the annular cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222221735.XU CN217922243U (en) | 2022-08-23 | 2022-08-23 | Horizontal spiral propulsion thermal reaction device |
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| CN202222221735.XU CN217922243U (en) | 2022-08-23 | 2022-08-23 | Horizontal spiral propulsion thermal reaction device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753712A (en) * | 2023-08-21 | 2023-09-15 | 山西大地民基生态环境股份有限公司 | Mixed powder treatment device for recycling red mud |
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- 2022-08-23 CN CN202222221735.XU patent/CN217922243U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116753712A (en) * | 2023-08-21 | 2023-09-15 | 山西大地民基生态环境股份有限公司 | Mixed powder treatment device for recycling red mud |
| CN116753712B (en) * | 2023-08-21 | 2023-10-20 | 山西大地民基生态环境股份有限公司 | Mixed powder treatment device for recycling red mud |
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