CN214065694U - Roller kiln without open fire - Google Patents

Abstract

The embodiment of the application provides a roller kiln without open fire, and relates to the field of kilns. This there is not open fire roller kilns includes: the kiln comprises a kiln body, wherein a roller type roller way which is arranged from a kiln head to a kiln tail and used for conveying products is arranged in the kiln body, a burning zone used for burning the products is further arranged in the kiln body, a plurality of porous medium burners are installed on the kiln body corresponding to the burning zone, and the burning heads of the porous medium burners face the roller type roller way. The open fire-free roller kiln disclosed by the embodiment of the application has no open fire, so that the defect caused by direct erosion of the product by flame is avoided; the temperature and the atmosphere in the furnace are uniform, so that the product is uniformly heated, the oxidation/reduction atmosphere is uniform, and the product quality can be improved.

Description

Roller kiln without open fire

Technical Field

The application relates to the field of kilns, in particular to a roller kiln without open fire.

Background

The roller kiln is a common kiln type in ceramic firing kilns, is suitable for firing flat plate-shaped ceramic products with light weight of single products such as floor tiles, wall tiles and the like, and has the advantages of energy conservation, high yield and the like. The existing roller kilns are generally provided with burners which are arranged on a roller rod in a vertically staggered manner, and the flame direction is parallel to the roller rod, but the roller kilns have the following defects:

most of fuel gas is injected into the roller kiln and is combusted by the combustor to generate flame, the quality of products is easily reduced due to the contact of the products and the flame, and the temperature difference of the inner wall of the kiln is easily reduced due to the direct contact of the refractory material on the inner wall of the kiln and the flame, so that the service life of the kiln is reduced.

The kiln with the burner arrangement mode cannot solve the problem of section temperature difference, and particularly for a wide kiln with the kiln width more than 3 meters, the section temperature difference of the kiln is extremely difficult to ensure within 20 ℃, so that the quality of products is reduced, and the yield is reduced. In addition, in order to ensure that the flame has sufficient combustion space in the kiln, the height in the kiln needs to be more than twice the maximum diameter of the flame, which leads to an increase in space in the kiln, thereby reducing thermal efficiency.

SUMMERY OF THE UTILITY MODEL

The roller kiln without open fire is provided, so that the defect caused by direct erosion of the product by flame is avoided; the temperature and the atmosphere in the furnace are uniform, so that the product is uniformly heated, the oxidation/reduction atmosphere is uniform, and the product quality can be improved.

In a first aspect, an embodiment of the present application provides a roller kiln without open flame, which includes: the kiln body, the internal roller formula roll table of arranging to the kiln tail, being used for transmitting the goods by the kiln head that is provided with of kiln, the internal burning zone that is used for realizing the goods and burns that still is provided with of kiln, installs a plurality of porous medium combustors on the kiln body that burning zone corresponds, and the burning head of porous medium combustor is internal towards the kiln.

In the implementation process, the product is conveyed by the roller type roller way, and when the product is conveyed to a burning zone, the porous medium burner is used for burning the product on the roller type roller way. Particularly, as the used burner is a porous medium burner, the fuel gas is completely burnt in the porous medium material, and the fuel gas released by the burner and entering the kiln body is high-temperature flue gas, the uniformity of the oxidation/reduction atmosphere in the kiln body can be ensured, open fire is avoided, and the defects caused by directly scouring products are avoided, specifically: the heated product can be ensured not to contact with flame, thereby improving the yield; the kiln body has no open fire, the inner wall of the kiln body is not contacted with flame, the temperature of the inner wall is relatively uniform, and the service life of the kiln can be prolonged. And the porous medium material which is burnt is in a red state, the heat exchange mode mainly comprises radiation heat exchange and convection heat exchange, and the temperature in the kiln body is uniform, so that the product is uniformly heated. Because the flame does not burn in the kiln body, the shape, the radius and the like of the flame do not need to be considered, the height in the kiln can be reduced, the internal space of the kiln body is reduced, and the energy-saving effect is achieved.

In a possible implementation mode, the combustion head of the porous medium combustor extends into the kiln body, and the length of the extending section relative to the inner wall of the kiln body is 50-500 mm.

In the implementation process, the combustion head of the porous medium combustor mounted on the kiln body extends into the kiln body, so that high-temperature flue gas can be released towards the inside of the kiln body as far as possible, and the high-temperature flue gas is favorably and uniformly diffused, so that the temperature in the kiln body is uniform.

In one possible embodiment, the combustion head of the porous medium burner faces the conveying surface of the roller bed or the opposite surface of the conveying surface.

In the implementation process, the high-temperature smoke released by the combustion head can comprehensively heat products on the roller-type roller way, and particularly uniformly heat flat-plate-shaped products flatly placed on the conveying surface of the roller-type roller way.

In one possible implementation, all the porous medium burners are arranged along the length direction of the roller table, one part of the porous medium burners is arranged above the roller table, and the other part of the porous medium burners is arranged below the roller table.

In the realization process, the porous medium burner releases high-temperature flue gas towards the upper surface and the lower surface of a product on the roller rod type roller way, so that the product is heated, the uniformity of the temperature of the heated product can be ensured by using and arranging the burner, the width of the burner can be freely customized, the condition that the width of the burner is limited because a plurality of burners are arranged in the width direction of a kiln body due to the fact that the heating efficiency is ensured is not needed to be considered, the uniformity of the temperature of the inner section of the kiln body is not limited by the width of the kiln, and particularly, the yield of a wide-body roller kiln with the inner width of 3m or more can be greatly improved.

In one possible implementation, all porous medium burners are located above and below the roller table in sequence and are staggered.

In the implementation process, the porous medium burners are arranged on the top and the bottom of the kiln in a staggered manner to uniformly heat the upper and lower surfaces of the product.

In one possible implementation, the porous medium burner has a burner head width that is the same as the article width.

In the above implementation, the width of the burner is tailored to be equal to the desired heating width of the product to ensure uniform temperature of the product during heating.

In one possible implementation, the kiln body comprises a shell and an insulating layer attached to the inner wall of the shell.

In one possible implementation mode, the bottom of the kiln body is provided with supporting legs; and/or fire observation holes are arranged on the kiln body corresponding to the burning zone.

In one possible implementation mode, the kiln body is divided into a preheating zone, a burning zone, a heat preservation zone and a cooling zone from the kiln head to the kiln tail, and a plurality of porous medium burners are respectively arranged on the kiln body corresponding to the preheating zone and the burning zone.

In the implementation process, the product is preheated by using the porous medium burner of the preheating zone, so that the temperature uniformity of the heated product in the heating process can be accurately ensured, and the yield can be effectively improved particularly for the ceramic product.

In one possible implementation, the porous medium burners of the preheating zone are arranged in the region close to the burning zone and at intervals.

In the implementation process, the product is gradually preheated to a certain temperature through the preheating zone and then enters the burning zone for heating and burning, so that defective products caused by severe change of heating temperature are reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a roller kiln without open fire according to a first embodiment of the present application;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

fig. 3 is a schematic structural diagram of a roller kiln without open fire according to a second embodiment of the present application.

Icon: 100-roller kiln without open fire; 110-a kiln body; 111-a housing; 112-an insulating layer; 120-roller table; 121-roll bar, 130-porous medium burner; 131-a combustion head; 140-fire observation holes; 150-supporting feet; 200-roller kiln without open fire; 210-a kiln body; 211-a housing; 212-an insulating layer; 220-preheating zone; 221-smoke outlet; 222-accident handling holes; 230-burning into a zone; 231-an upper baffle plate; 232-lower retaining wall; 233-temperature measuring hole; 240-heat preservation belt; 250-a cooling zone; 251-a quench air duct; 252-heat extraction air port; 253-quick cooling air pipe.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present application, as presented in the figures, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present application, it is to be noted that the terms "upper", "lower", "horizontal", "inner", "outer", and the like refer to orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally found in use of products of the application, and are used for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.

Furthermore, the term "horizontal" and like terms do not require that the components be absolutely horizontal or overhanging, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," and "connected" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

First embodiment

Referring to fig. 1 and fig. 2, the present embodiment provides a roller kiln 100 without open fire, which includes: the kiln body 110, the roller-type roller table 120 arranged from the kiln head to the kiln tail and used for conveying the product is arranged in the kiln body 110, the kiln body 110 is further provided with a firing zone for firing the product, in other embodiments, the kiln body 110 may further be provided with other functional regions, such as a pre-firing zone, a cooling zone, and the like, so as to achieve the whole firing process of the product. In general, the kiln body 110 is formed in a straight line from a kiln head to a kiln tail, and the kiln body 110 is formed by a kiln top, a kiln bottom and a kiln wall and has a space in a length direction inside. The kiln body 110 corresponding to the burning zone is provided with fire observation holes 140, the fire observation holes 140 are usually arranged on the kiln wall, the fire observation holes 140 are not vertical to the furnace wall, the burning states of the burning heads arranged at the furnace top and the furnace bottom can be observed, some of the fire observation holes are arranged above the roller-type roller way 120 and are used for observing the heating condition on the roller-type roller way 120, and some of the fire observation holes are arranged below the roller-type roller way 120 and are used for observing the heating condition under the roller-type roller way 120; the bottom of the kiln body 110 is also provided with supporting feet 150. The roller table 120 is mainly composed of a plurality of parallel rollers 121, two ends of each roller 121 are respectively installed on the kiln walls on two sides, the roller table 120 is horizontally arranged along the length direction of the kiln body 110, and the rollers 121 roll to drive the products carried by the rollers to advance along the roller table 120.

In this embodiment, a plurality of porous medium burners 130 are installed on the kiln body 110 corresponding to the firing zone, and a combustion head 131 of each porous medium burner 130 faces the inside of the kiln body 110. The outlet flow rate of the porous medium burner 130 is smaller than that of the traditional high-speed burner, and the flow of the flue gas in the kiln body 110 is facilitated. The porous medium burner 130 used in the embodiment of the present application generally includes a housing and a porous combustion medium disposed in the housing, wherein gas is combusted in the porous combustion medium, and the generated high-temperature flue gas is released from the burner head 131. The combustion head 131 of the porous medium combustor 130 extends into the kiln body 110, and the length of the extending section relative to the inner wall of the kiln body 110 is generally 50-500 mm; specifically, all the porous medium burners 130 are arranged along the length direction of the roller table 120, the width of the combustion head 131 (the length along the width direction of the kiln body 110) of each porous medium burner 130 may be the same as the width of the product (the length along the width direction of the kiln body 110), all the porous medium burners 130 are sequentially arranged in the upper and lower directions of the roller table 120 and staggered, that is, when viewed along the length direction of the roller table 120, one porous medium burner 130 is arranged above the roller table 120, the other porous medium burner 130 is arranged below the roller table 120, and the two porous medium burners 130 are not arranged oppositely; the combustion head 131 of the porous medium burner 130 faces the conveying surface of the roller bed 120 or the reverse surface of the conveying surface.

In this embodiment, the kiln body 110 includes a housing 111 and an insulating layer 112 attached to an inner wall of the housing 111, as an example, the insulating layer 112 at the top of the kiln body 110 includes a common aluminum silicate fiber blanket layer and a JM26 layer sequentially stacked from outside to inside, the insulating layer 112 at the bottom of the kiln includes a floating bead clay layer, a high aluminum poly light ball layer and a JM26 layer sequentially stacked from outside to inside, and the insulating layer 112 at the wall of the kiln includes a common aluminum silicate insulating cotton, a JM23 layer and a JM26 layer sequentially stacked from outside to inside, so as to meet the insulating requirements at different positions.

Second embodiment

Referring to fig. 3, the present embodiment provides a roller kiln 200 without open fire, which includes: the kiln body 210 comprises a shell 211 and a heat insulation layer 212 attached to the inner wall of the shell 211, a roller type roller way 120 which is arranged from a kiln head to a kiln tail and used for conveying products is arranged in the kiln body 210, the kiln body 210 is divided into a preheating zone 220, a firing zone 230, a heat insulation zone 240 and a cooling zone 250 from the kiln head to the kiln tail, and a plurality of porous medium burners 130 are respectively installed on the kiln body 210 corresponding to the preheating zone 220, the firing zone 230 and the heat insulation zone 240. In this embodiment, the node number setting conditions of each region are as follows:

the following describes the regions of the roller kiln 200 without open fire:

(1) preheating zone 220

The preheating zone 220 is divided into four sections from the kiln head to the kiln tail, and the porous medium burner 130 is arranged in the area close to the burning zone 230, and is arranged at intervals, specifically: the first section has 6 sections, no burner is arranged, but a smoke outlet 221 and an accident handling hole 222 are arranged; the second section has 5 sections without any burner, and the thickness of the insulating layer 212 of the section is increased compared with that of the first section; the third section has 4 sections, the kiln bottom of each section is provided with a porous medium burner 130, and compared with the second section, the thickness of the heat-insulating layer 212 of the section is increased; the fourth section has 8 sections, and the kiln bottom of each section is provided with a porous medium burner 130, and compared with the third section, the thickness of the heat-insulating layer 212 of the section is increased. With the above arrangement, the temperature of each section of the preheating zone 220 increases in a gradient manner, thereby gradually increasing the temperature of the conveyed product.

(2) Burning zone 230

The firing zone 230 has 7 sections, and the kiln top and the kiln bottom of each section are respectively provided with one porous medium burner 130, that is, all the porous medium burners 130 in the firing zone 230 are arranged on two sides of the roller bed 120 in an up-down and staggered manner. The critical preheating zone 220 of the burning zone 230 and the critical heat-preserving zone 240 are provided with an upper baffle 231 and a lower baffle 232 to reduce the heat loss of the burning zone 230 without affecting the product transportation. The burning zone 230 is also provided with a temperature measuring hole 233.

(3) Thermal insulation belt 240

The heat-insulating belt 240 has 2 sections, and two porous medium burners 130 are respectively arranged on the kiln top and the kiln bottom of each section, that is, all the porous medium burners 130 in the heat-insulating belt 240 are arranged on two sides of the roller bed 120 in an up-down and staggered manner.

(4) Cooling zone 250

The cooling zone 250 is divided into two sections, the first section is provided with 5 sections, and the kiln wall of each section is provided with a quenching air pipe 251; the second section has 7 sections, and the kiln top and the kiln bottom of each section are provided with heat extraction air ports 252; the third section has 7 sections, the kiln wall of the front 4 sections is provided with a fast cooling air pipe 253, and the rear 3 sections are not provided with air pipes or air ports.

In summary, the roller kiln without open fire has no open fire, so that the defect caused by direct erosion of the product by flame is avoided; the temperature and the atmosphere in the furnace are uniform, so that the product is uniformly heated, the oxidation/reduction atmosphere is uniform, and the product quality can be improved.

The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. The roller kiln without open fire is characterized by comprising: the kiln body, the internal roller formula roll table of arranging to the kiln tail, being used for transmitting the goods by the kiln head that is provided with of kiln, still be provided with the burning zone that is used for realizing that the goods burns till in the kiln body, the burning zone corresponds install a plurality of porous medium combustors on the kiln body, the burning head orientation of porous medium combustor the kiln is internal.

2. The open-fire-free roller kiln as claimed in claim 1, wherein the combustion head of the porous medium burner extends into the kiln body, and the length of the extending section relative to the inner wall of the kiln body is 50-500 mm.

3. The flameless roller kiln according to claim 1, wherein the combustion head of the porous medium burner is opposite to the conveying surface of the roller bed or the reverse surface of the conveying surface.

4. The flameless roller kiln according to claim 1 or 3, wherein all of the porous medium burners are disposed along a length direction of the roller table, and a portion of the porous medium burners are disposed above the roller table, and another portion of the porous medium burners are disposed below the roller table.

5. The flameless roller kiln according to claim 4, wherein all of the porous medium burners are located above and below the roller table in sequence and are staggered.

6. The flameless roller kiln according to claim 4, wherein the width of the combustion head of the porous medium burner is the same as or greater than the width of the product.

7. The open-fire-free roller kiln as claimed in claim 1, wherein the kiln body comprises a shell and an insulating layer attached to the inner wall of the shell.

8. The open-fire-free roller kiln as claimed in claim 1, wherein the bottom of the kiln body is provided with supporting legs; and/or fire observation holes are arranged on the kiln body corresponding to the burning zone.

9. The open-flame-free roller kiln as claimed in claim 1, wherein the kiln body is divided into a preheating zone, the firing zone, a heat preservation zone and a cooling zone from the kiln head to the kiln tail, and a plurality of porous medium burners are respectively arranged on the kiln body corresponding to the preheating zone and the firing zone.

10. The flameless roller kiln according to claim 9, wherein the porous medium burners of the preheating zone are disposed at intervals in a region adjacent to the firing zone.

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