阅读说明：本技术 一种用于粉体材料制备的节能回转炉 (Energy-saving rotary furnace for preparing powder material ) 是由 陈跃峰 张毅 于 2021-08-19 设计创作，主要内容包括：本发明涉及材料加工技术领域,公开了一种用于粉体材料制备的节能回转炉,包括：炉体、第一炉管和第二炉管,炉体内部具有加热腔,炉体两侧内壁及底壁分别具有加热元件,加热元件可以为电加热及燃料加热均可,加热元件及温区对称排布,第一炉管固定于加热腔内,第二炉管固定于加热腔内,第二炉管与第一炉管平行,第二炉管的进料端与第一炉管的出料端同向设置,本发明提供一种用于粉体材料制备的节能回转炉,能够通过在炉膛内设置两个方向相反的炉管提升降低热量损耗。(The invention relates to the technical field of material processing, and discloses an energy-saving rotary furnace for preparing powder materials, which comprises: the energy-saving rotary furnace comprises a furnace body, a first furnace tube and a second furnace tube, wherein a heating cavity is arranged in the furnace body, heating elements are respectively arranged on the inner walls and the bottom wall of two sides of the furnace body, the heating elements can be electric heating and fuel heating, the heating elements and a temperature zone are symmetrically arranged, the first furnace tube is fixed in the heating cavity, the second furnace tube is parallel to the first furnace tube, and the feeding end of the second furnace tube and the discharging end of the first furnace tube are arranged in the same direction.)

1. An energy-saving rotary furnace for preparing powder materials is characterized by comprising:

the furnace comprises a furnace body (1), wherein a heating cavity (2) is formed in the furnace body (1), and heating elements (3) are respectively arranged on the inner walls and the bottom wall of two sides of the furnace body (1);

the first furnace tube (4) is fixed in the heating cavity (2);

the second furnace tube (5) is fixed in the heating cavity (2), the second furnace tube (5) is parallel to the first furnace tube (4), the feeding end (12) of the second furnace tube (5) is arranged in the same direction as the discharging end (10) of the first furnace tube (4), and a gap is reserved between the second furnace tube (5) and the first furnace tube (4).

2. The energy-saving rotary furnace for preparing powder materials according to claim 1, wherein the second furnace tube (5) and the first furnace tube (4) rotate in opposite directions, and the second furnace tube (5) and the first furnace tube (4) both rotate in a direction away from the center line of the furnace body (1).

3. The energy-saving rotary furnace for preparing powder materials according to claim 1, wherein the peripheries of the cooling sections (13) of the first furnace tube (4) and the second furnace tube (5) are respectively connected with a stirring fan (14), the stirring fans (14) are fixed in the furnace body (1), and air paths (16) are respectively communicated between the cooling section (13) of the first furnace tube (4) and the heating section (15) of the second furnace tube (5) and between the heating section (15) of the first furnace tube (4) and the cooling section (13) of the second furnace tube (5).

4. The energy-saving rotary furnace for preparing powder materials according to claim 1, wherein the temperature reduction section (13) and the temperature rise section (15) of the first furnace tube (4) and the second furnace tube (5) are both sprayed with graphene coating or carbon nanotube coating.

5. The energy-saving rotary furnace for preparing powder materials according to any one of claims 1 to 3, wherein the first furnace tube (4) and the second furnace tube (5) are both horizontally arranged or obliquely arranged.

6. The energy-saving rotary furnace for preparing powder materials according to any one of claims 1 to 3, characterized in that the inner wall of the furnace body (1) is provided with a heat-insulating wall (6).

7. The double-tube rotary kiln according to any one of claims 1 to 3, wherein the feed ends (12) of the first furnace tube (4) and the second furnace tube (5) are each connected to a silo (7) by a feed screw.

8. The double-tube rotary kiln according to claim 7, wherein the feed ends (12) of the first furnace tube (4) and the second furnace tube (5) are respectively connected with an exhaust port (11), and the exhaust ports (11) are connected with a feed back device.

9. The double-tube rotary kiln according to any one of claims 1 to 3, wherein the first furnace tube (4) and the second furnace tube (5) are connected to a driving mechanism (8) so that the first furnace tube (4) and the second furnace tube (5) rotate around respective central axes.

10. The double-tube rotary kiln according to any one of claims 1 to 3, wherein a cooling cover (9) is respectively sleeved outside the first furnace tube (4) and the second furnace tube (5).

Technical Field

The invention relates to the technical field of material processing, in particular to an energy-saving rotary furnace for preparing powder materials.

Background

The rotary kiln is special equipment for treating powder materials, adopts a drum-type rotary kiln structure, and uniformly heats materials in a furnace tube by heating a heat-resistant steel furnace tube in rotary motion.

The traditional rotary kiln mainly comprises a kiln body, a furnace tube transmission device, a feeding device, an electrical control part and the like. The automatic system with complete equipment configuration realizes automatic operation functions of automatic operation control, operation state monitoring, operation state analog display, operation fault alarm indication and the like of the whole equipment through a PLC (programmable logic controller), a touch screen and a configuration interface.

However, in the existing rotary kiln, only one single furnace tube is arranged in each hearth, the heat dissipation area for cooling the single furnace tube and the heat accumulator are too large, so that part of heat is used for heating the heat accumulator, and part of heat is wasted due to heat dissipation.

Disclosure of Invention

The invention provides an energy-saving rotary furnace for preparing powder materials, which can reduce heat loss by arranging two furnace tubes in opposite directions in a hearth.

The invention provides an energy-saving rotary furnace for preparing powder materials, which comprises:

the furnace body is internally provided with a heating cavity, and the inner walls and the bottom wall at two sides of the furnace body are respectively provided with a heating element;

the first furnace tube is fixed in the heating cavity;

the second furnace tube is fixed in the heating cavity, the second furnace tube is parallel to the first furnace tube, the feeding end of the second furnace tube and the discharging end of the first furnace tube are arranged in the same direction, and a gap is reserved between the second furnace tube and the first furnace tube.

Optionally, the second furnace tube and the first furnace tube rotate in opposite directions, and both the second furnace tube and the first furnace tube rotate in a direction away from the central line of the furnace body

Optionally, the peripheries of the cooling sections of the first furnace tube and the second furnace tube are respectively connected with stirring fans, the stirring fans are fixed in the furnace body, and air path pipelines are respectively communicated between the cooling section of the first furnace tube and the heating section of the second furnace tube and between the heating section of the first furnace tube and the cooling section of the second furnace tube.

Optionally, the temperature reduction section and the temperature rise section of the first furnace tube and the second furnace tube are both sprayed with graphene coating or carbon nanotube coating.

Optionally, the first furnace tube and the second furnace tube are both horizontally arranged or obliquely arranged.

Optionally, the inner wall of the furnace body is provided with a heat preservation wall.

Optionally, the feeding ends of the first furnace tube and the second furnace tube are respectively connected with a bin through a feeding screw.

Optionally, the feed ends of the first furnace tube and the second furnace tube are respectively connected with an exhaust port, and the exhaust ports are connected with a material returning device.

Optionally, the first furnace tube and the second furnace tube are both connected to a driving mechanism, so that the first furnace tube and the second furnace tube rotate around respective central axes.

Optionally, a cooling cover is sleeved outside each of the first furnace tube and the second furnace tube.

Compared with the prior art, the invention has the beneficial effects that: the invention arranges two parallel first furnace tubes and second furnace tubes in the furnace body, and arranges the discharge end of the first furnace tube and the feed end of the second furnace tube in the same direction, thus leading the cooling section of the first furnace tube and the heating section of the second furnace tube to be opposite and share a chamber, and the heating section of the first furnace tube and the cooling section of the second furnace tube to be opposite and share a chamber, thus the heat emitted by the cooling section of the first furnace tube can be transferred to the heating section of the second furnace tube by radiation, gas convection and the like, the heat emitted by the cooling section of the second furnace tube can be transferred to the first furnace tube by radiation, gas convection and the like, thereby playing the role of recycling the heat of the cooling section, avoiding heat waste, reducing the energy consumption required by heating of the heating section, realizing the purpose of energy saving, arranging one furnace tube in the original furnace chamber, taking the heat preservation wall at the periphery as a heat accumulator and a heat radiator, arranging two furnace tubes with the front and rear ends in reverse directions in the furnace chamber, the two furnace tubes share the outer furnace body and the heat insulation wall body in the constant high temperature area, the heating cavity shares one furnace tube, no partition wall is arranged between the two furnace tubes, the heat accumulator and the heat dissipation area are reduced, and simultaneously, compared with two identical single-tube furnaces, the double-tube furnace has the advantages that the heat dissipation area and the heat accumulator are both reduced, so that the energy is saved by 10-12 percent, compared with the conventional single-tube rotary kiln.

Drawings

Fig. 1 is a schematic structural view of a double-tube rotary kiln according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a first furnace tube and a second furnace tube according to an embodiment of the present invention.

Description of reference numerals:

1-furnace body, 2-heating cavity, 3-heating element, 4-first furnace tube, 5-second furnace tube, 6-heat preservation wall, 7-storage bin, 8-driving mechanism, 9-cooling cover, 10-discharging end, 11-exhaust port, 12-feeding end, 13-cooling section, 14-stirring fan, 15-heating section and 16-air path pipeline.

Detailed Description

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

The rotary kiln is special equipment for treating powder materials, adopts a drum-type rotary kiln structure, and uniformly heats materials in a furnace tube by heating a heat-resistant steel furnace tube in rotary motion.

The traditional rotary kiln mainly comprises a kiln body, a furnace tube transmission device, a feeding device, an electrical control part and the like. The automatic system with complete equipment configuration realizes automatic operation functions of automatic operation control, operation state monitoring, operation state analog display, operation fault alarm indication and the like of the whole equipment through a PLC (programmable logic controller), a touch screen and a configuration interface.

However, in the existing rotary kiln, only one single furnace tube is arranged in each hearth, the heat dissipation area for cooling the single furnace tube and the heat accumulator are too large, so that part of heat is used for heating the heat accumulator, and part of heat is wasted due to heat dissipation.

Based on the above technical problems, the energy-saving rotary furnace for powder material preparation provided by the invention can reduce heat loss by arranging two furnace tubes in opposite directions in a hearth, and is specifically described with reference to the accompanying drawings, wherein fig. 1 is a schematic structural diagram of the energy-saving rotary furnace for powder material preparation provided by an embodiment of the invention, and fig. 2 is a schematic structural diagram of a first furnace tube and a second furnace tube provided by an embodiment of the invention.

As shown in fig. 1-2, an energy-saving rotary furnace for preparing powder material provided by the embodiment of the present invention includes: furnace body 1, first boiler tube 4 and second boiler tube 5, furnace body 1 is inside to have heating chamber 2, furnace body 1 both sides inner wall and diapire have heating element 3 respectively, heating element 3 can be for electrical heating (resistance wire, elema etc.) and fuel heating all can, heating element 3 and warm area symmetry arrange, first boiler tube 4 is fixed in heating chamber 2, second boiler tube 5 is parallel with first boiler tube 4, the feed end 12 of second boiler tube 5 and the discharge end 10 syntropy of first boiler tube 4 set up, it is gapped between second boiler tube 5 and the first boiler tube 4.

The invention arranges two parallel first furnace tubes and second furnace tubes in the furnace body, and arranges the discharge end of the first furnace tube and the feed end of the second furnace tube in the same direction, thus leading the cooling section of the first furnace tube and the heating section of the second furnace tube to be opposite and share a chamber, and the heating section of the first furnace tube and the cooling section of the second furnace tube to be opposite and share a chamber, thus the heat emitted by the cooling section of the first furnace tube can be transferred to the heating section of the second furnace tube by radiation, gas convection and the like, the heat emitted by the cooling section of the second furnace tube can be transferred to the first furnace tube by radiation, gas convection and the like, thereby playing the role of recycling the heat of the cooling section, avoiding heat waste, reducing the energy consumption required by heating of the heating section, realizing the purpose of energy saving, arranging one furnace tube in the original furnace chamber, taking the heat preservation wall at the periphery as a heat accumulator and a heat radiator, arranging two furnace tubes with the front and rear ends in reverse directions in the furnace chamber, the two furnace tubes share the outer furnace body and the heat insulation wall body in the constant high temperature area, the heating cavity shares one furnace tube, no partition wall is arranged between the two furnace tubes, the heat accumulator and the heat dissipation area are reduced, and simultaneously, compared with two identical single-tube furnaces, the double-tube furnace has the advantages that the heat dissipation area and the heat accumulator are both reduced, so that the energy is saved by 10-12 percent, compared with the conventional single-tube rotary kiln.

Optionally, the second furnace tube 5 and the first furnace tube 4 rotate in opposite directions, the second furnace tube 5 and the first furnace tube 4 both rotate in a direction away from the center line of the furnace body 1, when viewed from the furnace end, the first furnace tube 4 (left furnace tube) rotates counterclockwise, the second furnace tube 5 (right furnace tube) rotates clockwise, and the inner surface of the furnace lining is sprayed with the inorganic composite reflective coating to reduce the temperature of the furnace surface.

Because the first furnace tube and the second furnace tube rotate in opposite directions and rotate in the direction away from the central line of the furnace body, the materials in the tubes are close to each other in the middle, the heat radiation distance is short, and the heat transfer effect is good.

Optionally, the peripheries of the cooling sections 13 of the first furnace tube 4 and the second furnace tube 5 are respectively connected with stirring fans 14, the stirring fans 14 are fixed in the furnace body 1, air path pipelines 16 are respectively communicated between the cooling section 13 of the first furnace tube 4 and the heating section 15 of the second furnace tube 5 and between the heating section 15 of the first furnace tube 4 and the cooling section 13 of the second furnace tube 5, in this embodiment, the peripheries of the cooling sections 13 of the first furnace tube 4 and the second furnace tube 5 are respectively connected with two stirring fans 14.

The stirring fan 14 further drives the air to flow, so that heat is quickly transferred from the cooling section to the heating section through the air path pipeline 16, the heat transfer time is reduced, the heat loss is further reduced, and the energy-saving effect is further achieved.

Optionally, the temperature reduction section 13 and the temperature rise section 15 of the first furnace tube 4 and the second furnace tube 5 are both coated with graphene coating or carbon nanotube coating, and the graphene coating or the carbon nanotube coating can improve the blackness of the first furnace tube 4 and the second furnace tube 5, enhance the radiation emissivity of the temperature reduction tube, further enhance the heat transfer, and improve the heat exchange effect.

Optionally, the first furnace tube 4 and the second furnace tube 5 are both horizontally arranged or obliquely arranged, when the furnace tubes are horizontally placed, feeding speed adjustment can be achieved through different inclination angles of the stir-frying plates in the rotary furnace tube, when the furnace tubes are placed obliquely, materials can advance in a spiral line manner when rotating in the furnace tubes, and the processing technology requirements of the stir-frying plates in the furnace tubes are reduced.

Optionally, the inner wall of the furnace body 1 is provided with a heat-insulating wall 6, and the heat-insulating wall 6 is made of aerogel or nano ceramic fiber for heat insulation in this embodiment.

Optionally, the feeding ends 12 of the first furnace tube 4 and the second furnace tube 5 are respectively connected with a storage bin 7 through a feeding screw.

Optionally, the feeding ends 12 of the first furnace tube 4 and the second furnace tube 5 are respectively connected with an exhaust port 11, and the exhaust port 11 is connected with a material returning device.

Optionally, the first furnace tube 4 and the second furnace tube 5 are both connected to a driving mechanism 8, so that the first furnace tube 4 and the second furnace tube 5 rotate around their respective central axes.

Optionally, a cooling cover 9 is respectively sleeved outside the first furnace tube 4 and the second furnace tube 5.

Optionally, the discharge ends 10 of the first furnace tube 4 and the second furnace tube 5 are respectively connected with an air supply system, and the feeding screw, the driving mechanism 8, the cooling cover 9, the air supply system and the exhaust port 11 are respectively and independently arranged, so that the first furnace tube 4 and the second furnace tube 5 can be ensured to independently operate without interfering with each other.

The invention arranges the two parallel first furnace tubes and the second furnace tubes in the furnace body, and arranges the discharge ends of the first furnace tubes and the feed ends of the second furnace tubes in the same direction, thus leading the cooling section of the first furnace tube and the heating section of the second furnace tubes to be opposite and share a chamber, and leading the heating section of the first furnace tube and the cooling section of the second furnace tube to be opposite and share a chamber, thus the heat emitted by the cooling section of the first furnace tube can be transferred to the heating section of the second furnace tube by radiation, gas convection and the like, the heat emitted by the cooling section of the second furnace tube can be transferred to the first furnace tube by radiation, gas convection and the like, the recycling of the heat of the cooling section is achieved, the heat waste is avoided, the energy consumption required by the heating section is reduced, the purpose of energy saving is achieved, in addition, because the first furnace tube and the second furnace tubes are opposite in rotation and both rotate towards the direction far away from the central line, the furnace tube is arranged in the original furnace, the peripheral heat insulation wall is a heat accumulator and a heat radiator, two furnace tubes with reverse front and back ends are arranged in the current furnace, the two furnace tubes share the outside furnace body and the heat insulation wall body in the constant high-temperature area, the heating cavity shares one furnace tube, and no partition wall is arranged in the middle of the two furnace tubes, so that the heat accumulator and the heat radiation area are reduced, and meanwhile, compared with two identical single-tube furnaces, the double-tube furnace has the advantages that the heat radiation area and the heat accumulator are both reduced, and the energy is saved by 10-12% compared with the conventional single-tube rotary kiln.

The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.