CN215638802U

CN215638802U - Novel anthracite electric heating furnace cover

Info

Publication number: CN215638802U
Application number: CN202122177292.4U
Authority: CN
Inventors: 孙四清
Original assignee: Jinan Hairun Carbon Technology Co ltd
Current assignee: Jinan Qingtao Engineering Design Co ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2022-01-25
Anticipated expiration: 2031-09-09

Abstract

The utility model discloses a novel anthracite electric heating furnace cover, and relates to the technical field of anthracite electric heating furnaces. The furnace cover comprises a plurality of refractory bricks, the refractory bricks are combined to form the furnace cover, and a feed port and an exhaust hole are formed in the furnace cover; an avoidance hole for the heating electrode to penetrate is formed in the center of the furnace cover; the furnace cover formed by the arched vertical section of the refractory brick is also arched, and compared with the traditional plane furnace cover, the arched furnace cover has stronger bearing capacity, so that the installation stability of the heating electrode on the furnace cover is improved; the dog-house sets up in keeping away from the one end in hole is dodged. The furnace cover has long service life and convenient maintenance, can improve the product processing quality of the anthracite electric heating furnace and reduce the energy consumption.

Description

Novel anthracite electric heating furnace cover

Technical Field

The utility model relates to the technical field of anthracite electric heating furnaces, in particular to a novel furnace cover of an anthracite electric heating furnace.

Background

The carbon atoms of the carbon material are irregularly arranged, and the carbon atoms are recrystallized and rearranged in order only through high-temperature heat treatment at 2200-2600 ℃, so that the carbon material can present a graphite crystal structure, thereby having many excellent performances of graphite, such as obviously improving electrical conductivity and thermal conductivity, better chemical and thermal stability, reducing impurities, reducing hardness, being easier for mechanical processing and the like.

In the prior art, the furnace cover of the anthracite electric heating furnace is composed of refractory bricks and is of a plane structure, the furnace cover is hung upside down on a fixing frame by a lifting hook, and the fixing frame is positioned above the anthracite electric heating furnace. The center of the interior of the anthracite electric heating furnace is provided with a vertically arranged heating electrode, and the feed inlet of the anthracite electric heating furnace is arranged at the periphery of the heating positive electrode. Fig. 1 is a schematic diagram showing the material accumulation in an anthracite electric heating furnace provided with a furnace cover in the prior art, as shown in fig. 1, after the material is fed into a furnace body 3 through a feeding port, the material is concentrated at the periphery of a heating electrode 4, the material is accumulated in the furnace body 3 into a forward cone shape, the heating electrode 4 is gradually descended from the middle to two sides at the boundary of the material to heat the material, and gas generated in the heating process is discharged from an annular flue.

The furnace cover of the existing anthracite electric heating furnace has the following technical defects:

firstly, because the bell comprises resistant firebrick and is the plane formula structure, poor stability, bearing capacity are poor, consequently under expend with heat and contract with cold's effect, resistant firebrick is cracked easily, leads to the phenomenon that the bell fracture falls the piece for the maintenance operation of bell is more difficult. Under normal conditions, the temperature of the material surface layer is about 1600 ℃, the highest service temperature of the refractory brick is 1300 ℃, and the service life of the furnace cover is shortened due to long-time use. Moreover, the combination of the furnace cover setting mode and the feeding mode reduces the volume of the gas bin in the furnace body, so that the exhaust pressure is large, the frequency of cleaning the flue by an operator is increased, and the quality of a produced product is lower under the condition.

Secondly, after the materials are fed into the furnace body through the feeding port, the materials are concentrated on the periphery of the heating electrode and are accumulated into a forward cone shape in the furnace body, the contact area between the heating electrode and the calcined materials is large, the current of the electrode is dispersed, the energy is dispersed, the heat loss is high, and the energy consumption is high; furthermore, the materials are stacked to form a regular cone, the stacking surface layer of the materials is thick, impurities of the materials are absorbed by the materials with lower temperature on the upper part after being discharged in the high-temperature area, and therefore the impurities can not be effectively and quickly discharged, and therefore the capacity and the product quality are reduced.

Therefore, the existing furnace cover has poor use stability, poor bearing capacity, short service life and difficult maintenance, and the anthracite electric heating furnace provided with the existing furnace cover has high energy consumption and low quality of produced products.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a novel anthracite electric heating furnace cover which has the advantages of good stability, strong bearing capacity, long service life and convenient maintenance, improves the product processing quality of the anthracite electric heating furnace and reduces the energy consumption.

In order to achieve the purpose, the utility model provides the following technical scheme: the novel anthracite electric heating furnace cover comprises a plurality of refractory bricks, wherein the refractory bricks are combined to form the furnace cover, and a feed port and an exhaust hole are formed in the furnace cover; an avoidance hole for the heating electrode to penetrate is formed in the center of the furnace cover;

the vertical section of the refractory brick is arched;

the dog-house sets up in keeping away from the one end in hole is dodged.

Preferably, the feed inlets are arranged in a plurality, and the feed inlets are uniformly arranged on the furnace cover by taking the avoiding hole as a center.

Preferably, the number of the feeding ports is the same as that of the refractory bricks, and each refractory brick is correspondingly provided with one feeding port.

Preferably, the contact surfaces of two adjacent refractory bricks are respectively provided with a limiting bulge and a limiting groove matched with the limiting bulge.

Preferably, the exhaust holes are provided with a plurality of exhaust holes, and the exhaust holes are uniformly distributed on the same circumference by taking the avoidance holes as centers.

Preferably, the center of the exhaust hole is arranged at the joint of two adjacent refractory bricks.

Preferably, an insulating sleeve is arranged in the avoiding hole, the insulating sleeve is sleeved on the outer side of the heating electrode, and the outer side face of the insulating sleeve is tightly attached to the avoiding hole.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the utility model, the furnace cover is formed by combining a plurality of refractory bricks with arch-shaped vertical sections, and the formed furnace cover is also arch-shaped, so that compared with the traditional plane furnace cover, the arch-shaped furnace cover has stronger bearing capacity, and the installation stability of the heating electrode on the furnace cover is improved. Secondly, the downside of arched bell has had certain space, consequently, the distance between the highest point of bell and the minimum of material grow, and the interval between whole bell and the material surface course increases. During the use, the temperature of material surface course is greater than the highest service temperature of bell, but the bell is kept away from the material surface course, and the temperature of bell internal surface compares and reduces by a wide margin in current bell, can prolong the life of bell relatively.

2. According to the utility model, the furnace cover is formed by combining a plurality of refractory bricks, the limit protrusions and the limit grooves matched with the limit protrusions are respectively arranged on the contact surfaces of two adjacent refractory bricks, the assembly is simple, the disassembly is convenient, and the later maintenance, replacement and other operations of the furnace cover are facilitated.

3. According to the utility model, the feeding port is arranged at the edge position far away from the heating electrode on the furnace cover, the raw materials fall at the edge position close to the inner wall in the furnace body after entering the furnace body, and the accumulation shape of the raw materials in the furnace body forms an inverted cone shape, so that the heating electrode is contacted with the materials at the lowest point, the contact between the heating electrode and the materials is concentrated, the heating efficiency can be improved, the electricity is saved, and the energy consumption is reduced.

4. According to the utility model, the inverted cone-shaped material accumulation mode thins the accumulation surface layer of the material, namely the contact thickness of the material and the heating electrode is thinned, the air permeability of the material is enhanced, impurities generated in the material heating process are rapidly discharged under a high-temperature environment, the productivity is effectively improved, and the quality of the produced product is correspondingly improved.

Drawings

FIG. 1 is a schematic view of the stacking of materials in an anthracite electric furnace equipped with a furnace lid according to the prior art;

FIG. 2 is a schematic view showing the material accumulation in an anthracite electric heating furnace equipped with a furnace cover according to an embodiment of the present invention;

FIG. 3 is an external view of the lid of the present invention;

FIG. 4 is a view showing the arrangement of the position-restricting protrusion and the position-restricting groove according to the present invention;

FIG. 5 is a schematic structural view of a refractory brick of the present invention;

fig. 6 is a vertical sectional view of the furnace lid of the present invention.

In the figure:

1-firebrick, 11-feeding port, 12-exhaust hole, 131-limit projection, 132-limit groove, 14-avoidance hole,

2-insulating sleeve, 3-furnace body, 4-heating electrode.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 3, the novel anthracite electric heating furnace cover comprises a plurality of refractory bricks 1, wherein the refractory bricks 1 are combined to form the furnace cover, and a feeding port 11 and an exhaust hole 12 are arranged on the furnace cover; an avoiding hole 14 for the heating electrode 4 to pass through is arranged at the central position of the furnace cover. The feeding port 11 is used for connecting a feeding pipe of raw materials; the exhaust hole 12 is used for connecting an exhaust pipe.

As shown in fig. 6, the firebricks 1 have an arch-shaped vertical section, and the height of the furnace lid formed by the combination gradually decreases from the center to the outside. Thus, compared with the traditional plane furnace cover, the firstly arched furnace cover has stronger bearing capacity, and the installation stability of the heating electrode on the furnace cover is improved. Secondly, the downside of arched bell has had certain space, consequently, the distance between the highest point of bell and the minimum of material grow, and the interval between whole bell and the material surface course increases. During the use, the temperature of material surface course is greater than the highest service temperature of bell, but the bell is kept away from the material surface course, and the temperature of bell internal surface compares and reduces by a wide margin in current bell, can prolong the life of bell relatively.

Preferably, as shown in fig. 3 and 5, the horizontal section of the refractory brick 1 is fan-shaped, so that the side line of the furnace cover formed by combination is circular, and the installation of the furnace cover and the electric furnace mouth is convenient. Of course, the actual shape of the boundary line of the refractory brick 1 may be designed adaptively according to the actual installation need of the furnace opening, and may be polygonal or the like.

Preferably, as shown in fig. 3, the feeding ports 11 are provided in plurality, the feeding ports 11 are uniformly arranged on the furnace cover with the avoidance hole 14 as a center, and the feeding ports 11 are arranged at one end far away from the avoidance hole 14. Because the feeding port 11 is arranged at one end far away from the avoiding hole 14, namely, at a position close to the edge of the furnace cover, the raw materials fall at the edge position close to the inner wall in the furnace body 3 after entering the furnace body 3 (fig. 2 is a schematic material accumulation diagram in the anthracite electrothermal furnace provided with the furnace cover provided by the embodiment of the utility model; please refer to fig. 2), after a period of blanking, the accumulation shape of the raw materials in the furnace body 3 forms an inverted cone, namely, the highest point of the raw material pile is close to the edge of the inner wall of the furnace body 3, and the lowest point of the raw material pile is at the heating electrode 4, so that the heating electrode 4 is contacted with the materials at the lowest point, the contact between the heating electrode 4 and the materials is concentrated, the current of the heating electrode 4 is concentrated, the heating materials are concentrated at the lowest point of the materials, the heating efficiency can be improved, the electricity can be saved, and the energy consumption can be reduced. Secondly, the material accumulation mode of the inverted cone shape enables the accumulation surface layer of the material to be thinned, namely the contact thickness of the material and the heating electrode 4 is thinned, the air permeability of the material is enhanced, impurities generated in the process of heating the material are rapidly discharged under a high-temperature environment, the space volume of gas in the furnace body 3 is increased by the arched furnace cover, and the smoothness of hot gas discharge is further improved.

Preferably, as shown in fig. 3, the number of the material feeding ports 11 is the same as the number of the refractory bricks 1, and one material feeding port 11 is correspondingly arranged on each refractory brick 1.

Specifically, in the present embodiment, 5 to 8 material inlets 11 are provided, specifically, in the present embodiment, 6 refractory bricks 1 are provided, and the refractory bricks 1 are provided in a fan-shaped structure with a central angle of 60 °.

Preferably, two adjacent refractory bricks 1 are fastened through primary and secondary groove connection. In a specific embodiment, the primary and secondary grooves include a limit protrusion 131 and a limit groove 132, which are respectively disposed on the contact surfaces of two adjacent refractory bricks 1 and are matched with the limit protrusion 131. Like this, adjacent two be connected through spacing arch 131 and spacing groove 132 cooperation between resistant firebrick 1, under the prerequisite of guaranteeing bell structural stability and gas tightness for the bell equipment is simple, and it is convenient to dismantle, is favorable to operations such as the later stage maintenance and the change of bell.

As a further improvement of the above technical solution, as shown in fig. 3, the exhaust holes 12 are provided in a plurality, and the plurality of exhaust holes 12 are uniformly arranged on the same circumference with the avoidance hole 14 as a center, so as to improve the uniformity of exhaust and uniformly exhaust the gas in the furnace body 3. Specifically, in this embodiment, the number of the exhaust holes 12 is 2, and naturally, in actual design, the specific number of the exhaust holes 12 can be adaptively designed according to the size of the furnace body and related exhaust requirements.

Preferably, as shown in fig. 3 and 5, the center of the exhaust hole 12 is disposed at a joint of two adjacent refractory bricks 1, that is, a semicircular through hole is formed at a connecting edge of the refractory bricks 1, and the two semicircular through holes are combined to form the exhaust hole 12. Thus, the later maintenance and cleaning of the exhaust hole 12 are convenient.

Preferably, as shown in fig. 4, an insulating sleeve 2 is arranged in the avoiding hole 14, the insulating sleeve 2 is sleeved on the outer side of the heating electrode 4, and the outer side surface of the insulating sleeve 2 is tightly attached to the inside of the avoiding hole 14. Therefore, the safety of the furnace body can be improved, the current disorder of the heating electrode caused by the conduction of the furnace cover can be prevented, and the heating effect is ensured.

The working principle is as follows: when the furnace cover is used, the furnace cover is formed by combining a plurality of arched refractory bricks 1, the arched furnace cover has stronger bearing capacity, and the installation stability of the heating electrode on the furnace cover is improved. Secondly, the downside of arched bell has had certain space, consequently, the distance between the highest point of bell and the minimum of material grow, and the interval between whole bell and the material surface course increases. During the use, the temperature of material surface course is greater than the highest service temperature of bell, but the bell is kept away from the material surface course, and the temperature of bell internal surface compares and reduces by a wide margin in current bell, can prolong the life of bell relatively.

The dog-house 11 sets up in keeping away from the one end of dodging hole 14, opens the position of establishing on the furnace cover and being close to the edge promptly, and the raw materials gets into furnace body 3 back, falls in the marginal position that is close to the inner wall in furnace body 3, through the unloading of a period of time, the shape of piling up of the raw materials in furnace body 3 forms the back taper, and the peak of raw materials heap is close to furnace body 3 inner wall edge promptly, and the minimum of raw materials heap is in heating electrode 4 department, so, heating electrode 4 and the material contact of minimum department, and heating electrode 4 concentrates with the contact of material, can improve heating efficiency, the power saving, the energy consumption is reduced. Meanwhile, the inverted cone-shaped material accumulation mode enables the accumulation surface layer of the material to be thinned, namely the contact thickness of the material and the heating electrode 4 is thinned, the air permeability of the material is enhanced, impurities generated in the process of heating the material are rapidly discharged in a high-temperature environment, the space volume of gas in the furnace body 3 is increased by the arched furnace cover, and the smoothness of hot gas discharge is further improved.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a novel anthracite electric heater bell which characterized in that: the furnace comprises a plurality of refractory bricks, wherein the refractory bricks are combined to form a furnace cover, and a feed port and an exhaust hole are formed in the furnace cover; an avoidance hole for the heating electrode to penetrate is formed in the center of the furnace cover;

the vertical section of the refractory brick is arched;

the dog-house sets up in keeping away from the one end in hole is dodged.

2. The novel anthracite electric heating furnace cover according to claim 1, is characterized in that: the feed inlets are arranged in a plurality of numbers, and the feed inlets are uniformly arranged on the furnace cover by taking the avoiding hole as a center.

3. The novel anthracite electric heating furnace cover according to claim 2, is characterized in that: the number of the feeding ports is consistent with that of the refractory bricks, and each refractory brick is correspondingly provided with one feeding port.

4. The novel anthracite electric heating furnace cover according to claim 1, is characterized in that: and the contact surfaces of two adjacent refractory bricks are respectively provided with a limiting bulge and a limiting groove matched with the limiting bulge.

5. The novel anthracite electric heating furnace cover according to claim 1, is characterized in that: the exhaust hole sets up a plurality of, a plurality of the exhaust hole with dodge the hole and evenly arrange on same circumference as the center.

6. The novel anthracite electric heating furnace cover according to claim 5, is characterized in that: the center of the exhaust hole is arranged at the joint of two adjacent refractory bricks.

7. The novel anthracite electric heating furnace cover according to claim 1, is characterized in that: an insulating sleeve is arranged in the avoidance hole, the insulating sleeve is sleeved on the outer side of the heating electrode, and the outer side face of the insulating sleeve is tightly attached to the avoidance hole.