Spray pyrolysis reaction furnace

Abstract

The utility model relates to the technical field of reaction furnaces, in particular to a spray pyrolysis reaction furnace, which comprises a hearth body, a gas inlet pipeline, a liquid inlet pipeline, a plurality of atomizing nozzles and a plurality of gas inlet nozzles, the plurality of atomizing nozzles are communicated with the gas inlet pipeline and the liquid inlet pipeline, the plurality of gas inlet nozzles are communicated with the gas inlet pipeline and the liquid inlet pipeline, and the gas inlet nozzles are communicated with the gas inlet pipeline and the liquid inlet pipeline. The plurality of gas inlet nozzles are communicated with the gas inlet pipeline, the hearth body is provided with an arc-shaped top cover, the plurality of atomizing nozzles are distributed on the arc-shaped top cover in a circular ring structure along a first direction, the plurality of circular ring structures formed by the plurality of atomizing nozzles are arranged at intervals, and the plurality of atomizing nozzles are communicated with the gas inlet pipeline. The multiple air inlet nozzles are arranged between the circular rings formed by every two adjacent atomization nozzles at intervals, the multiple air inlet nozzles and the multiple atomization nozzles are arranged, and therefore the use efficiency of the hearth body can be improved under the condition that the initial feeding flow speed and the initial air pressure are not changed.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction furnaces, in particular to a spray pyrolysis reaction furnace. Background Art

[0002] As a new technology, spray pyrolysis has been used as a traditional technology to study powder materials since the last century. In recent years, with the development of the new energy materials market, it has gradually been applied to the preparation of ternary materials. Its advantage is that metal salts or their mixed solutions can be directly used to synthesize precursors and positive electrode materials. Therefore, it has the advantages of short process, low cost, no pollution source emissions, controllable product particle size, good uniformity and adaptable doping.

[0003] However, the current process equipment for preparing positive electrode materials or precursors by spray pyrolysis has a relatively simple furnace structure. Generally, the material is fed into the high-temperature furnace from a single gasification / liquid two-fluid pipeline. The atomized particles undergo physical and chemical reactions in the high-temperature field to generate acidic gas or powder particles. The resulting materials are collected after secondary separation, and the gas is recovered. However, in the above process, since the droplets from a single nozzle naturally fall on the top of the furnace after being dispersed by the nozzle, the dispersion radius is often concentrated on the periphery of the atomization radius when the equipment is operating normally, resulting in the droplet density in the central area being smaller than that in the periphery, which in turn leads to the overall utilization efficiency of the upper furnace being not high. Utility Model Content

[0004] The utility model discloses a spray pyrolysis reaction furnace, which is used for improving the overall use efficiency of the furnace.

[0005] In order to achieve the above object, the utility model provides the following technical solutions:

[0006] The utility model provides a spray pyrolysis reaction furnace, comprising: a furnace body, an air inlet pipeline, a liquid inlet pipeline, an atomizing nozzle and an air inlet nozzle;

[0007] There are multiple atomizing nozzles, and the multiple atomizing nozzles are all connected to the air inlet pipeline and the liquid inlet pipeline. There are multiple air inlet nozzles, and the multiple air inlet nozzles are all connected to the air inlet pipeline.

[0008] The furnace body has an arc-shaped top cover, and multiple atomizing nozzles are distributed on the arc-shaped top cover in a circular structure along a first direction, and there are multiple circular structures formed by the multiple atomizing nozzles, and the multiple circular structures are arranged at intervals. The first direction is the direction from the center of the furnace body to the edge, and the air intake nozzles are arranged at intervals between the circular shapes formed by each two adjacent atomizing nozzles.

[0009] The present application adds multiple air intake nozzles and arranges the multiple air intake nozzles between multiple atomizing nozzles, so that when the atomizing nozzle atomizes the medium to be atomized, the air intake nozzle can continuously perform gas interference on the atomization area, thereby providing a turbulent flow field between the initial droplet groups to prevent the droplets from overlapping and re-melting. In addition, the present application arranges multiple air intake nozzles and atomizing nozzles, thereby effectively improving the efficiency of a single furnace body when the initial feed flow rate and the initial gas pressure remain unchanged, thereby indirectly reducing the equipment investment cost and the present application also improves the utilization efficiency of the furnace body.

[0010] In some embodiments, along the first direction, an air intake nozzle is disposed between every two adjacent atomizing nozzles.

[0011] In some embodiments, each of the atomizing nozzles has a first end away from the arc-shaped top cover, and the air intake nozzles have a second end away from the arc-shaped top cover, and the first end and the second end are both oriented toward the center point of the curvature circle at the intersection of the arc-shaped top cover and the atomizing nozzle and / or the air intake nozzle.

[0012] In some embodiments, the opening direction of the arc-shaped top cover is toward the furnace body, and the distance between the center position of the arc-shaped top cover and the plane where the arc-shaped top cover and the furnace body are connected is b, and the radius of the furnace body is r, where the relationship between b and r satisfies 0≤b≤r.

[0013] In some embodiments, the number of atomizing nozzles is x, wherein the relationship between x and r satisfies: 1+4(r-1)≤x≤1+10(r-1);

[0014] The number of the air inlet nozzles is y, wherein the relationship between y and x satisfies: 1 / 10≤y / x≤1.

[0015] In some embodiments, the air intake pipeline includes an air intake main pipe and a plurality of air intake branch pipes, wherein one end of each of the plurality of air intake branch pipes is connected to the air intake main pipe, and the other end is respectively connected to the air intake nozzle and the atomizing nozzle.

[0016] In some embodiments, the spray pyrolysis reactor further includes a plurality of first regulating components, wherein the first regulating components are disposed on the air inlet branch pipe, and any one of the first regulating components corresponds to any one of the air inlet branch pipes one by one;

[0017] The first regulating component includes a gas flow meter and a speed control valve.

[0018] In some embodiments, the liquid inlet pipeline includes a liquid inlet main pipe and a plurality of liquid inlet branch pipes, wherein one end of each of the plurality of liquid inlet branch pipes is connected to the liquid inlet main pipe, and the other end thereof is connected to each of the atomizing nozzles.

[0019] In some embodiments, the spray pyrolysis reactor further includes a plurality of second regulating components, the second regulating components are arranged on the liquid inlet branch pipe, and any one of the second regulating components corresponds to any one of the liquid inlet branch pipes one by one;

[0020] The second regulating component includes a liquid flow meter and a controllable flow rate valve.

[0021] In some embodiments, the air inlet nozzle is provided with a plurality of air outlet holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure of a spray pyrolysis reactor provided by the utility model;

[0023] Figure 2 A schematic diagram of the structure of a furnace body in a spray pyrolysis reactor provided by the utility model;

[0024] Figure 3 This is a side view of a furnace body in a spray pyrolysis reactor in the utility model;

[0025] Figure 4 This is a top view of a furnace body in a spray pyrolysis reactor in the utility model;

[0026] Figure 5 It is a schematic diagram of an installation structure of the atomizing nozzle in the utility model;

[0027] Figure 6 It is a schematic diagram of another installation structure of the atomizing nozzle in the utility model;

[0028] Figure 7 It is a structural schematic diagram of an air intake nozzle in the utility model.

[0029] Among them: 1-furnace body, 11-arc top cover, 2-air inlet nozzle, 21-air outlet, 3-atomizing nozzle, 4-liquid inlet main pipe, 42-liquid inlet branch pipe, 41-second regulating component, 5-air inlet main pipe, 51-first regulating component, 52-air inlet branch pipe. DETAILED DESCRIPTION

[0030] The embodiment of the present application provides a spray pyrolysis reaction furnace for improving the overall utilization efficiency of the furnace.

[0031] The following will combine the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Among them, in the description of the embodiments of the present application, unless otherwise specified, " / " means or, for example, A / B can mean A or B; "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "multiple" refers to two or more than two.

[0032] In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as suggesting or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, unless otherwise specified, "plurality" means two or more.

[0033] like Figure 1 As shown, the embodiment of the utility model provides a spray pyrolysis reaction furnace, comprising: a furnace body 1, an air inlet pipeline, a liquid inlet pipeline, an atomizing nozzle 3 and an air inlet nozzle 2;

[0034] There are multiple atomizing nozzles 3, and the multiple atomizing nozzles 3 are all connected to the air inlet pipeline and the liquid inlet pipeline. There are multiple air inlet nozzles 2, and the multiple air inlet nozzles 2 are all connected to the air inlet pipeline.

[0035] The furnace body 1 has an arc-shaped top cover 11, and multiple atomizing nozzles 3 are distributed on the arc-shaped top cover 11 in a circular structure along a first direction. There are multiple circular structures formed by the multiple atomizing nozzles 3, and the multiple circular structures are arranged at intervals. The first direction is the direction from the center of the furnace body 1 to the edge, and the air intake nozzles 2 are arranged at intervals between the circular shapes formed by each two adjacent atomizing nozzles 3.

[0036] The present application adds a plurality of air intake nozzles 2, and arranges the plurality of air intake nozzles 2 between the plurality of atomizing nozzles 3, so that when the atomizing nozzles 3 atomize the medium to be atomized, the air intake nozzles 2 can continuously perform gas interference on the atomization area, thereby providing a turbulent flow field between the initial droplet groups to prevent the droplets from overlapping and re-melting. In addition, the present application arranges a plurality of air intake nozzles 2 and atomizing nozzles 3, thereby being able to effectively improve the efficiency of a single furnace body 1 while keeping the initial feed flow rate and the initial gas pressure unchanged, thereby indirectly reducing the equipment investment cost, and the present application also improves the utilization efficiency of the furnace body 1.

[0037] For a possible implementation, see Figure 2 , the opening direction of the arc-shaped top cover 11 is toward the furnace body 1, and the distance between the center position of the arc-shaped top cover 11 and the plane where the arc-shaped top cover 11 and the furnace body 1 are connected is b, and the radius of the furnace body 1 is r, wherein the relationship between b and r satisfies 0≤b≤r. In the above scheme, the present application further limits b≤r. If b>r, the arc-shaped top cover 11 is an oblong shape at this time. On this basis, the deviation of some nozzles will be biased toward the horizontal direction, resulting in poor effect of the nozzles, thereby failing to avoid the occurrence of the above situation. The present application sets the arc-shaped top cover 11 to be semicircular or elliptical.

[0038] For a possible implementation, see Figure 3 , the number of atomizing nozzles 3 is x, where the relationship between x and r satisfies: 1+4(r-1)≤x≤1+10(r-1). In the above structure, in order to ensure the dispersion range of the atomizing nozzles 3, the present application requires more atomizing nozzles 3, but if there are too many atomizing nozzles 3, the droplets sprayed by the atomizing nozzles 3 will overlap and re-melt, thereby affecting the atomization effect. Therefore, the atomizing nozzles 3 in the present application need to limit the number of atomizing nozzles 3 according to the radius of the furnace body 1, so as to meet the dispersion range of the atomizing nozzles 3 while reducing the overlap of droplets. It is worth noting that when the number of atomizing nozzles 3 in the present application satisfies 1+4(r-1)≤x≤1+6(r-1), the atomization effect of the atomizing nozzles 3 is better.

[0039] For a possible implementation, see Figure 3 , the number of air intake nozzles 2 is y, wherein the relationship between y and x satisfies: 1 / 10≤y / x≤1. In the above structure, the present application needs to limit the number of air intake nozzles 2 according to the number of atomizing nozzles 3, thereby avoiding the air intake nozzles 2 occupying too much space of the atomizing nozzles 3 or increasing the cost, and avoiding too few air intake nozzles 2 causing poor turbulence effect on the atomizing nozzles 3, thereby ensuring the atomization effect of the atomizing nozzles 3.

[0040] For a possible implementation, see Figure 1The air intake pipeline includes an air intake main pipe 5 and multiple air intake branch pipes 52, wherein one end of the multiple air intake branch pipes 52 are connected to the air intake main pipe 5, and the other ends are respectively connected to the air intake nozzle 2 and the atomizing nozzle 3, wherein a part of the air intake branch pipe 52 is used to connect with the air intake nozzle 2 to ensure that the air intake nozzle 2 can better blow out the airflow, and the other part is used to connect with the atomizing nozzle 3 to provide the necessary air pressure for the atomizing nozzle 3.

[0041] For a possible implementation, see Figure 1 The spray pyrolysis reactor also includes a plurality of first regulating components 51, which are arranged on the air intake branch pipes 52, and any one of the first regulating components 51 corresponds one-to-one to any one of the air intake branch pipes 52. The first regulating components 51 include a gas flow meter and a speed control valve. The present application can effectively control the flow of gas inside each air intake branch pipe 52 through the first regulating components 51, so that the present application can meet different working conditions.

[0042] For a possible implementation, see Figure 1 The liquid inlet pipeline includes a liquid inlet main pipe 4 and multiple liquid inlet branch pipes 42, wherein one end of the multiple liquid inlet branch pipes 42 is connected to the liquid inlet main pipe 4, and the other end is connected to the atomizing nozzle 3 respectively, so as to better transport the liquid to be atomized to the atomizing nozzle 3.

[0043] In one possible implementation, the spray pyrolysis reactor also includes multiple second control components 41, which are arranged on the liquid inlet branch pipe 42, and any second control component 41 corresponds one-to-one to any liquid inlet branch pipe 42. The second control component 41 includes a liquid flow meter and a controllable flow rate valve, also to enable the present application to meet different working conditions.

[0044] For a possible implementation, see Figure 4 Along the first direction, an air intake nozzle 2 is arranged between every two adjacent atomizing nozzles 3. In the above design, the present application arranges the atomizing nozzle 3 and the air intake nozzle 2 in a straight line, so that the atomizing effect of the atomizing nozzle 3 can be more obvious.

[0045] For a possible implementation, see Figure 5 , Figure 6 Each atomizing nozzle 3 has a first end away from the arc-shaped top cover 11, and each air inlet nozzle 2 has a second end away from the arc-shaped top cover 11. The first end and the second end are oriented to the center point of the curvature circle where the arc-shaped top cover 11 and the atomizing nozzle 3 and / or the air inlet nozzle 2 intersect. For details, please refer to Figure 3As shown in the figure, in the present application, one end of any atomizing nozzle 3 and / or air intake nozzle 2 away from the arc-shaped top cover 11 points to the center point of the curvature circle at the intersection with the arc-shaped top cover 11. On this basis, when the atomizing nozzle 3 and / or the air intake nozzle 2 spray the medium, the spraying direction of both is away from the side wall of the furnace body 1, thereby avoiding the medium sprayed by the atomizing nozzle 3 and / or the air intake nozzle 2 from falling to the side wall of the furnace body 1. At the same time, the droplets and airflow concentrated at the center of the furnace body 1 can effectively improve the pyrolysis efficiency of the entire furnace.

[0046] For a possible implementation, see Figure 7 The air inlet nozzle 2 is provided with a plurality of air outlet holes 21. The air inlet nozzle 2 in the present application is different from the atomizing nozzle 3, and its end is porous, that is, the plurality of air outlet holes 21 are randomly distributed, which can provide a dispersed airflow for the surrounding initial atomized droplet group, further improve the dispersion of the droplets inside the furnace, thereby improving the thermal efficiency of the furnace.

[0047] The following is a description of the specific embodiments of the present application in conjunction with specific data:

[0048] Assuming that the flow rate of the atomized liquid is e and the air pressure is w, then under a conventional atomization system, in order to ensure that the properties of the atomized particles such as BET and particle size reach the target values, e / w is a certain value, and this fixed value cannot be easily changed for a specific product.

[0049] In one embodiment, the furnace body 1 of the present application selects a furnace with a height of 10m and a radius r of 3m as a pyrolysis device, wherein the distance b between the arc-shaped top cover 11 and the horizontal line of the furnace top is 3m.

[0050] Distribution of nozzle quantity: The distribution of atomizing nozzles 3 and air intake nozzles 2 is located on the same diameter line, and the atomizing nozzles 3 and the air intake nozzles 2 are cross-distributed. The number of atomizing nozzles 3 is 1+8*(3-1)=17, and correspondingly, the number of air intake nozzles 2 is 8.

[0051] Actual reaction process: first set the gas partial pressure and liquid flow rate e, w of each atomizing nozzle 3, then control the ratio of atomizing gas pressure to liquid flow rate through the first regulating component 51 and the second regulating component 41 respectively, and start feeding. At this time, multiple atomizing nozzles 3 start working at the same time, and the air inlet nozzle 2 adopts the preset air pressure and starts to introduce turbulent gas at the same time to promote the effective dispersion of droplets on the top of the furnace.

[0052] Effect of the embodiment: per unit time, the device of the utility model can ensure that multiple atomizing nozzles 3 perform atomizing feeding while ensuring that the original e / w ratio remains unchanged. Compared with feeding with a single nozzle, the thermal efficiency of the furnace is increased by 17 times; the increase in the amount of material collected per unit time greatly improves the utilization rate of the equipment, while reducing the unit energy consumption cost of the product material.

[0053] In another embodiment, the furnace body 1 of the present application selects a furnace with a height of 5m and a radius r of 3m as a pyrolysis device, wherein the distance b between the arc-shaped top cover 11 and the horizontal line of the furnace top is 2m.

[0054] Distribution of nozzle quantity: The distribution of atomizing nozzles 3 and air intake nozzles 2 is located on the same diameter line, and the atomizing nozzles 3 and the air intake nozzles 2 are cross-distributed. The number of atomizing nozzles 3 is 1+8*(3-1)=17, and correspondingly, the number of air intake nozzles 2 is 8.

[0055] Actual reaction process: first set the gas partial pressure and liquid flow rate e, w of each atomizing nozzle 3, then control the ratio of atomizing gas pressure to liquid flow rate through the first regulating component 51 and the second regulating component 41 respectively, and start feeding. At this time, multiple atomizing nozzles 3 start working at the same time, and the air inlet nozzle 2 adopts the preset air pressure and starts to introduce turbulent gas at the same time to promote the effective dispersion of droplets on the top of the furnace.

[0056] Effect of the embodiment: per unit time, the device of the utility model can ensure that multiple atomizing nozzles 3 perform atomizing feeding while ensuring that the original e / w ratio remains unchanged. Compared with feeding with a single nozzle, the thermal efficiency of the furnace is increased by 17 times; the increase in the amount of material collected per unit time greatly improves the utilization rate of the equipment, while reducing the unit energy consumption cost of the product material.

[0057] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A spray pyrolysis reactor, characterized in that: include: Furnace body, air inlet pipeline, liquid inlet pipeline, atomizing nozzle and air inlet nozzle; There are multiple atomizing nozzles, and the multiple atomizing nozzles are all connected to the air inlet pipeline and the liquid inlet pipeline. There are multiple air inlet nozzles, and the multiple air inlet nozzles are all connected to the air inlet pipeline. The furnace body has an arc-shaped top cover, and multiple atomizing nozzles are distributed on the arc-shaped top cover in a circular structure along a first direction, and there are multiple circular structures formed by the multiple atomizing nozzles, and the multiple circular structures are arranged at intervals. The first direction is the direction from the center of the furnace body to the edge, and the air intake nozzles are arranged at intervals between the circular shapes formed by each two adjacent atomizing nozzles.

2. The spray pyrolysis reactor according to claim 1, characterized in that: Along the first direction, an air intake nozzle is arranged between every two adjacent atomizing nozzles.

3. The spray pyrolysis reactor according to claim 1, characterized in that: Each of the atomizing nozzles has a first end away from the arc-shaped top cover, and each of the air intake nozzles has a second end away from the arc-shaped top cover, and the first end and the second end are both oriented toward the center point of the curvature circle at the intersection of the arc-shaped top cover and the atomizing nozzle and / or the air intake nozzle.

4. The spray pyrolysis reactor according to claim 1, characterized in that: The opening direction of the arc-shaped top cover faces the furnace body, and the distance between the center position of the arc-shaped top cover and the plane where the arc-shaped top cover and the furnace body are connected is b, and the radius of the furnace body is r, wherein the relationship between b and r satisfies 0≤b≤r.

5. The spray pyrolysis reactor according to claim 4, characterized in that: The number of the atomizing nozzles is x, wherein the relationship between x and r satisfies: 1+4(r-1)≤x≤1+10(r-1); The number of the air inlet nozzles is y, wherein the relationship between y and x satisfies: 1 / 10≤y / x≤1.

6. The spray pyrolysis reactor according to claim 1, characterized in that: The air intake pipeline includes an air intake main pipe and a plurality of air intake branch pipes, wherein one end of the plurality of air intake branch pipes is connected to the air intake main pipe, and the other end is respectively connected to the air intake nozzle and the atomizing nozzle.

7. The spray pyrolysis reactor according to claim 6, characterized in that: The spray pyrolysis reactor further comprises a plurality of first regulating components, wherein the first regulating components are arranged on the air intake branch pipe, and any one of the first regulating components corresponds to any one of the air intake branch pipes one by one; The first regulating component includes a gas flow meter and a speed control valve.

8. The spray pyrolysis reactor according to claim 1, characterized in that: The liquid inlet pipeline comprises a liquid inlet main pipe and a plurality of liquid inlet branch pipes, wherein one end of the plurality of liquid inlet branch pipes are connected to the liquid inlet main pipe, and the other end thereof are respectively connected to the atomizing nozzles.

9. The spray pyrolysis reactor according to claim 8, characterized in that: The spray pyrolysis reactor further comprises a plurality of second regulating components, wherein the second regulating components are arranged on the liquid inlet branch pipe, and any one of the second regulating components corresponds to any one of the liquid inlet branch pipes one by one; The second regulating component includes a liquid flow meter and a controllable flow rate valve.

10. The spray pyrolysis reactor according to claim 1, characterized in that: The air inlet nozzle is provided with a plurality of air outlet holes.

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