KR100590401B1 - Firing kiln for expansion perlite - Google Patents

Abstract

The present invention relates to an expanded perlite firing furnace, and more particularly, in the firing and foaming of perlite crystallization at a high temperature, it is possible to increase the amount of crystallized and to maximize the efficiency of flame energy by modifying the shape of the flame radiated from the firing furnace. It can be effective.

The present invention for realizing this, a furnace having a long horizontal space in the horizontal direction, a crystallization receiving for supplying perlite crystallization into the interior of the furnace, flames by burning fuel to heat and expand the crystallized supplied to the furnace In the expanded perlite firing furnace comprising a burner for generating a flame, the flame emitting sphere in which the flame generated from the burner is emitted to one side of the furnace, the burner is provided with two or more flame radiator connected to each burner It is formed in parallel to the left and right sides of the, the flame radiator is a hollow flame guide is opened in the horizontal direction is coupled, characterized in that to increase the width of the flame.

Perlite, Burner, Firing Furnace, Crystalline, Crystal Box, Horizontal Furnace, Vertical Furnace

Description

Firing kiln for expansion perlite}             

1 is a configuration diagram schematically showing the entire process of expanding the perlite using a conventional vertical expansion perlite firing furnace,

Figure 2 is a schematic diagram showing the overall process of expanding the perlite using a conventional horizontal expansion perlite firing furnace,

3 is a schematic structural diagram of a conventional horizontal expansion perlite firing furnace,

4 is a view showing the operating principle of the horizontal expansion perlite firing furnace according to the present invention,

5 is a view showing the principle of operation as another embodiment of the present invention.

♧ explanation of symbols for main parts of drawing

1-Meter feeder 2-Preheater

3-Vibration Feeder 4-Lift

5,5 '-Firing furnace 6-Capture cyclone

7-silos 10-roton

20-Crystal Tray 30-Burner

31-Flame Relief 32-Flame Guide

The present invention relates to an expanded perlite firing furnace, and more particularly, in the firing and foaming of perlite crystallization at a high temperature, it is possible to increase the amount of crystallized and to maximize the efficiency of flame energy by modifying the shape of the flame radiated from the firing furnace. The present invention relates to an expanded perlite firing furnace.

Lightweight expanded perlite obtained by pulverizing minerals selected from soldiers perlite consisting of obsidian, songji, pumice and pearlite, by calcination and foaming at a high temperature of about 1000 ° C. Since it is composed of honeycomb-shaped pores and has excellent thermal insulation, it is widely used as a material for industrial and building insulation, insulation, sound insulation or fireproof coating. In addition, the expanded perlite has high drainage performance and effective moisture content required by plants, and is also used for landscaping materials and agricultural horticulture.

The principle of expansion of perlite is that when the ferrite crystal containing volatile components receives sudden high temperature heat, the outside of the crystal becomes molten, and at this time, the volatile substance that has not escaped to the outside becomes gasified by the continuous high temperature heat. It is to expand the volume of crystallized state.

As described above, the expansion of the perlite is performed in a firing kiln, and there are two types of firing furnaces, a vertical type and a horizontal type.

Figure 1 is a schematic diagram showing the overall process of expanding the perlite using a conventional vertical expansion perlite firing furnace.

Referring to the drawings, the perlite crystallization is supplied to the preheater (2) through a fixed-quantity feeder (1) and preheated under a predetermined condition, the preheated crystallization is a vertical kiln (5) through the vibration feeder (3) and the elevator (4) ), And the perlite expanded in the kiln 5 is collected by the collecting cyclone 6 through the top of the kiln 5 by hot air, transported to the silo 7, and then packaged and released as a product.

By using the vertical furnace as described above, since crystallization falls to the front of the vertically soaring flame and is heated in the entire flame, crystallization can be efficiently heated, and thus the production capacity of the expanded perlite is excellent. However, in order to collect the expanded perlite in the collecting cyclone (6), the perlite must be transferred to the upper part of the kiln 5 through the hot air and discharged, which requires an excessive amount of air necessary for transportation in addition to the air required for combustion. Therefore, there is a disadvantage in that fuel consumption is increased accordingly. In addition, this method of conveying and discharging the vertical furnace has a large particle size when the crystal grains having a large particle size distribution are used, so that the particle size is heavy and falls to the bottom of the kiln, and the small particle size is light, so that it is transferred to the upper part before it is heated by touching the flame. It may be discharged, there is also a problem that the degree of expansion is greatly different depending on the size of the crystallization.

Figure 2 is a schematic diagram showing the overall process of expanding the perlite using a conventional horizontal expansion perlite firing furnace, Figure 3 is a schematic structural diagram of a conventional horizontal expansion perlite firing furnace.

Referring to FIG. 2, the perlite is introduced into the kiln 5 'through the metering feeder 1, and the perlite expanded in the kiln 5' is moved outwardly by the operation of a screw (not shown) installed therein. After being discharged, it is collected in a collecting cyclone (6), transferred to a silo (7), and then packaged and released as a product. In FIG. 2, the arrow indicated by the dotted line indicates the path through which the gas generated by combustion in the kiln 5 'is discharged.

Meanwhile, referring to FIG. 3 (a), the operation process of the horizontal type kiln is described in more detail as follows. The general horizontal expansion perlite firing furnace includes a furnace 10, crystallization receiving 20, burner 30, flame radiator (31). The perlite crystallized to one side of the furnace 10 is moved by the operation of the screw (not shown) formed on the outside of the furnace 10 in the direction of the arrow toward the burner 30 is installed, through the crystal receiving 20 , Is supplied to the inside of the furnace (10). Since the flame generated by the combustion of fuel in the burner 30 is radiated through the flame radiator 31 inside the furnace 10, the crystallization is heated and expanded in the flame, and then the furnace 10. It is discharged to the outside by the operation of a screw (not shown) installed separately in the interior.

When using the horizontal furnace as described above, because the crystallization is moved to rotate the outer periphery of the furnace 10, the preheating process is performed by the hot heat inside the furnace 10, unlike a vertical furnace, a separate preheater is not required. There is no advantage. However, in the horizontal furnace, crystals injected for foaming fall to the side of the flames, and thus the crystals cannot be heated as a whole, so that crystals cannot be efficiently heated, and in some cases, crystals are not foamed and are discharged in an unexpanded state. There are drawbacks to this. In particular, in the conventional horizontal furnace, a cone-shaped flame radiator 31 is used, in which the shape of the radiated flame is circular in cross section, as shown in FIG. 3 (b), to be heated in a flame. The crystallization that can be limited by the left and right width of the flame formed. However, in the case of the prototype, since the right and left width of the available flame is small, the amount of crystallization that can be added at a time is also reduced, there is a problem that the production amount generated from the unit fuel is reduced.

On the other hand, when looking at the conventional technology related to the perlite, it is mostly about the technology to utilize the expanded perlite, and there is no research on more effective technology to manufacture the expanded perlite, but only in Japan, A firing method and a firing furnace for perlite have been filed (特 願 平 9-177825). The invention is to form a plurality of holes in the crystallization tray which is a device for supplying crystallization into the firing furnace to improve the production capacity by using the flame evenly as a whole, and the ferrite crystallization is evenly introduced into the flame through the hole. However, the crystallization basin should be installed near the top of the flame, so that the deformation of the crystallization basin occurs due to the high heat of the flame, causing problems in durability.

The present invention was devised in view of the above circumstances, and in a horizontal expansion perlite firing furnace having an advantage of not using a separate preheater as compared to the vertical type, only one side of the flame is utilized, and energy efficiency is lowered. By improving the shortcomings of unexpanded powder, increasing the flame emission sphere where the flame is radiated or by installing a separate flame guide in the flame emission sphere, it is possible to make full use of flame energy to improve the production of expanded perlite and product quality. The purpose is to provide an expanded perlite kiln.

The present invention is an expansion perlite firing furnace for achieving the above object, a furnace having a long inner space in the horizontal direction, crystallization receiving the ferrite crystal to the inside of the furnace, heating and expanding the crystal supplied to the furnace In the expanded perlite kiln comprising a burner for burning a flame to generate a flame by burning the fuel, and a flame radiator for emitting the flame generated from the burner to one side of the furnace, the burner is provided with two or more burners to each burner It is characterized in that the connected flame radiator is formed in parallel to the left and right sides of the furnace, thereby increasing the width of the flame.

According to another embodiment of the present invention, a furnace having a long horizontal space in the horizontal direction is formed, a crystallization receiving for supplying perlite crystallization into the interior of the furnace, by burning fuel to heat and expand the crystallized supplied to the furnace In the expanded perlite kiln comprising a burner for generating a flame, a flame radiator for radiating the flame generated from the burner to one side of the furnace, the hollow flame guide is opened in the horizontal direction to the flame radiator It is characterized by changing the shape of the flame in accordance with the cross-sectional shape of the flame guide.

According to another embodiment of the present invention, a furnace having a long horizontal space in the horizontal direction is formed, a crystallization receiving unit for supplying perlite crystallization into the interior of the furnace, combustion of fuel to heat and expand the crystallization supplied to the furnace. In the expanded perlite firing furnace comprising a burner for generating a flame, and a flame radiator for emitting the flame generated from the burner to one side of the furnace, the burner is provided with two or more flame radiator connected to each burner It is formed in parallel to the left and right sides of the cross-section, the flame radiation sphere is characterized in that the hollow flame guide is opened in the horizontal direction, the width of the flame is increased.

Hereinafter, with reference to the accompanying drawings, the configuration and embodiment of the present invention will be described in detail.

4 is a view showing the operating principle of the horizontal expansion perlite firing furnace according to the present invention.

Referring to FIG. 4 (a), the present invention includes a furnace 10, a crystallization tray 20, a burner 30, and a flame radiator 31 similarly to a general horizontal expansion perlite firing furnace. One side of the furnace 10 is formed with a flame radiator 31 connected to the burner 30, and the ferrite crystal is supplied through the crystal receiving chamber 20 with the flame radiated from the flame radiator 31 It expands by heating. By the way, according to the present invention, two or more burners 30 and flame-emitting spheres 31 are formed in parallel from left to right. Therefore, as shown in Figure 4 (b), the flame formed in the furnace 10 is greatly increased in the right and left width, and the problem of not being able to supply a large amount of perlite crystal at the same time by limiting the left and right width of the flame formed in the conventional kiln. I can eliminate it. At this time, the burner 30 is preferably smaller than the conventional burner in consideration of the size of the furnace 10 and the amount of fuel consumed to reduce the length of the flame, but it is preferable to increase the left and right width. In addition, the interval between the two or more burners 30 are arranged so that the edges of the flame radiated from each flame radiator 31 overlap each other, thereby preventing the problem of unheating because some of the input crystallization is not in contact with the flame. This is good.

Figure 5 shows another embodiment of the present invention, referring to Figure 5 (a), the present invention, as in the conventional horizontal expansion perlite firing furnace, the furnace 10, crystallization receiving 20, burner 30 And, having a flame radiator (31), unlike the only 4 burner 30 is used, unlike the flame guide (31) is characterized in that the flame guide 32 is coupled to. The flame guide 32, the cross section has a constant shape, has a constant length in the horizontal direction open structure, the former is associated with the role of changing the shape of the flame, the latter serves to guide the flame in one direction Is associated with.

That is, the flame guide 32 having a predetermined cross section is coupled to and installed in the flame radiator 31 so that the shape of the flame radiated according to the cross section of the flame guide 32 can be changed, In order to process a ferrite crystal, it is preferable that the flame width is large. Referring to FIG. 5 (b), when using a long or rectangular flame guide 32 having a horizontal length, a larger amount of perlite crystal may be injected when directly radiated without the flame guide 32. You can check it.

On the other hand, since the flame guide 32 has a constant length in the horizontal direction, the flame is guided by the length of the flame guide (32). When the flame guide 32 is not used as in the past, the radiated flame is not concentrated and spreads widely, so that the intensity of the flame is weakened. When the flame guide 32 is used, the flame guide 32 is used while passing through the flame guide 32. Since the flames are forcibly concentrated, the flames can be spread relatively less and use the flames evenly, which can solve the above problem.

4 and 5, according to the present invention, since the left and right width of the flame radiated compared to the previous increase and thus a greater amount of perlite crystallization can be processed at a time, crystallization by the left and right width of the increased flame The width of the base should also be wider so that a larger amount of perlite crystal can be introduced.

The present invention may be variously applied and used by those skilled in the art based on those shown in FIGS. 4 and 5. For example, by combining the technology of using a plurality of burners and the technology using a flame guide, using a plurality of small burners can be installed in each flame radiator connected to each burner to maximize the effect of the present invention, In addition, the present invention is not particularly limited to an expanded perlite kiln, and can be suitably applied to a kiln that generally emits flames by burning fuel.

The present invention can be better understood by the following examples, which are for illustrative purposes of the present invention and do not limit the protection scope set forth in the claims.

Comparative Example 1

Low pressure spraying proportional control oil burner in a barrel with an inner diameter of ^φ 800 mm, and a diesel oil in a conventional horizontal kiln equipped with a conical flame guide The expansion was performed by adding crystallites having 80% or more of 32 meshes to 50 meshes.

Example 1

In Comparative Example 1, the conical flame guide was cut about 40 mm in the longitudinal direction, and then a rectangular guide was added, and the crystallization tray was deformed in accordance with the increased width of the flame to increase the crystal input amount to 1400 kg / hr and expanded in the same manner. .

Example 2

In Comparative Example 1, two low-pressure spraying proportional oil burners D-PLB-20E were connected in parallel to two low-pressure spraying proportional oil burners D-PLB-10E (manufactured by Nippon Sino Industrial Co., Ltd., firing rate 55.2 ℓ / hr). Then, the crystallization tray was deformed in accordance with the increased width of the flame to increase the crystallization amount to 1400 kg / hr and expanded in the same manner.

At this time, in order to find the effect difference according to the present invention, the appropriate amount of the expanded perlite discharged from the kiln is collected, the particle size distribution is measured through the sieving according to KS A 5101, and the unit volume weight and unexpanded powder are measured according to KS F 3701. In order to determine the difference between production capacity and fuel saving, the fuel source unit (= fuel consumption / productivity) according to productivity (= crystallization input / unit volume weight) and unit yield is calculated and shown in Table 1.

As shown in Table 1, the highest and lowest difference of the unit volume weight for each particle size is 42 kg / m 3 (96 kg / m 3 -54 kg / m 3) in Comparative Example 1, which is a conventional technique. In Example 1, 11 kg / m 3 (76 kg / m 3 -65 kg / m 3), and in Example 2 13 kg / m 3 (75 kg / m 3 -62 kg / m 3), the difference was significantly reduced. It shows that it is expanded uniformly by particle size.

 In addition, compared to Comparative Example 1, which is an improved technique, Examples 1 and 2, the unexpanded fraction was reduced by half, and the productivity was greatly improved to 120% and 116%, respectively, and the fuel source unit was 18% and 15, respectively. It can be seen that there is a% reduction effect.

As described above, according to the expanded perlite kiln of the present invention, it is possible to significantly improve the quality of the product by reducing the variation in the unit volume weight and unexpanded content by particle size, and to lower the manufacturing cost by increasing productivity and reducing fuel source unit. . In addition, it is possible to improve the fusion phenomenon between the perlite particles or the heat fusion between the perlite particles and the inner wall of the kiln, which is generated during the discharge of the expanded perlite through the bottom of the kiln, and thus has an advantage of expanding the operation of the kiln in various ways.

Claims (6)

A furnace having a long horizontal space and an inner space formed therein, a crystal tray for supplying perlite crystals to the interior of the furnace, a burner that generates flame by burning fuel to expand and heat the crystal supplied to the furnace, In the expanded perlite firing furnace is installed on one side and comprises a flame radiator formed so that the flame generated from the burner is ejected into the interior of the furnace, the burner is provided with two or more flame radiator connected to each burner An expansion perlite firing furnace, characterized in that it is arranged in parallel to the left and right sides of the furnace to increase the width of the flame. A furnace having a long horizontal space and an inner space formed therein, a crystal tray for supplying perlite crystals to the interior of the furnace, a burner that generates flame by burning fuel to expand and heat the crystal supplied to the furnace, In the expanded perlite firing furnace is installed on one side and comprises a flame radiator formed so that the flame generated from the burner is ejected into the interior of the furnace, the hollow flame guide is opened in the horizontal direction to the flame radiator An expanded perlite kiln, characterized in that the shape of the flame is changed according to the cross-sectional shape of the flame guide. 3. The expanded perlite sintering furnace according to claim 2, wherein the flame guide has an elliptical cross section to increase the width of the flame. 3. The expanded perlite firing furnace according to claim 2, wherein the flame guide has a rectangular cross section to increase the width of the flame. A furnace having a long horizontal space and an inner space formed therein, a crystal tray for supplying perlite crystals to the interior of the furnace, a burner that generates flame by burning fuel to expand and heat the crystal supplied to the furnace, In the expanded perlite firing furnace is installed on one side and comprises a flame radiator formed so that the flame generated from the burner is ejected into the interior of the furnace, the burner is provided with two or more flame radiator connected to each burner Arranged in one side of the furnace in parallel to the left and right, the flame radiator is an expanded perlite firing furnace characterized in that the hollow flame guide is opened in the horizontal direction, the width of the flame is increased. The expanded perlite sintering furnace according to any one of claims 1 to 5, wherein the crystallization tray is modified in width by the left and right widths of the increased flame.

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