WO2002093077A1

WO2002093077A1 - Oxygen flame burner cooled by water for melting and spraying materials

Info

Publication number: WO2002093077A1
Application number: PCT/KR2002/000810
Authority: WO
Inventors: Young-Hoon Jo
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-05-12
Filing date: 2002-04-30
Publication date: 2002-11-21
Anticipated expiration: 2003-11-12
Also published as: JP2004534194A; KR200243640Y1

Abstract

The present invention relates to an oxygen flame burner cooled by water for melting and spraying materials which is capable of forming a lengthy and high tempetature flame and melting a certain raw material such as a powder state stainless, steel, copper, ceramic, etc. and a certain raw material such as a sludge, waste liquid, etc. and then thermally spraying the molten material. The oxygen flame burner cooled by water for melting and spraying materials includes a burner body in which a plurality of circular columns each having different diameters and heights are arranged in a multiple-layer structure with respect to the centre of an axis of the same, a hole are formed in each layer in an axial direction, and the above holes are formed in a circumferential direction in multiple numbers, and a plurality of nozzles which are engaged with a circular column of each layer for forming a sealed space by connecting the holes formed in each layer of the circular column of the burner body.

Description

OXYGEN FLAME BURNER COOLED BY WATER FOR MELTING

AND SPRAYING MATERIALS

TECHNICAL FIELD

The present invention relates to an oxygen flame burner cooled by water for melting and spraying materials, and in particular to an oxygen flame burner cooled by water for melting and spraying materials which is capable of melting and spraying a certain material such as a powder state stainless, steel, copper, ceramic, etc. under a flame environment by forming a high temperature state flame.

BACKGROUND ART

Generally, an oxygen flame burner cooled by water for melting and spraying materials is directed to forming a high temperature flame, melting a material such as a powder state stainless, steel, copper, ceramic, etc. and a material such as a sludge, waste liquid, etc. in the flame and hardening the same.

In the conventional oxygen flame burner cooled by water for melting and spraying materials, it is difficult to form a high temperature flame, and it takes long time for forming a high temperature flame.

DETAILED DESCRIPTION OF THE PRESENT INVENTION

Accordingly, it is an object of the present invention to provide an oxygen flame burner cooled by water for melting and spraying materials wliich is capable of forming a high temperature flame during a short time, melting a certain material such as a stainless, steel, copper, ceramic, etc. thermally spraying the molten material to a surface of a certain object, fabricating a solid product by pouring the molten material into a certain mould and generating a recycling material by melting a sludge or waste liquid or hardening the same.

In order to overcome the above object, there is provided an oxygen flame burner cooled by water for melting and spraying materials which includes a cylindrical burner body which is formed in a multiple-layer structure in one side of the same, and is formed in a flat shape in the other side of the same, a cooling chamber which is fonned in an outer portion of the burner body for thereby cooling the burnet body to a certain temperature, a raw material spraying hole which passes through a centre line portion of the burner body in order for certain raw material to flow therethrough, first through third fuel spraying holes which each pass through in a longitudinal direction along a circumferential portion of a corresponding layer in a direction that a radius is increased with respect to a centre of the raw material spraying hole, first through fourth nozzles which are engaged to the multiple layer portions of the burner body, among the above nozzles, the first nozzle includes a raw material supply port which communicates with the raw material spraying hole and tlirough which a raw material is supplied from the outside, and a centre nozzle which is arcanged in a centre line of the raw material hole and includes a spraying hole for a compression air or suction gas, the second nozzle includes a first fuel port which communicated with the plurality of the first fuel spraying holes, the third nozzle includes a second fuel port which communicates with the plurality of the second fuel spraying holes, and the fourth nozzle includes a third fuel port which communicates with the plurality of the third fuel spraying holes.

In addition, an oxygen flame burner cooled by water for melting and spraying materials according to the present invention includes a burner body in which a plurality of circular columns each having different diameters and heights are arranged in a multiple-layer structure with respect to the centre of an axis of the same, a hole are formed in each layer in an axial direction, and the above holes are formed in a circumferential direction in multiple numbers, and a plurality of nozzles which are engaged with a circular column of each layer for fom ing a sealed space by connecting the holes formed in each layer of the circular column of the burner body.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 A is an assembled cross-sectional view illustrating an oxygen flame burner cooled by water for melting and spraying materials according to a first embodiment of the present invention; Figure IB is an assembled cross-sectional view illustrating an oxygen flame burner cooled by water for melting and spraying materials according to a second embodiment of the present invention;

Figure 2 is a right side view of Figure 1 A according to the present invention; Figure 3 is a view illustrating the construction of a powder supply apparatus installed in an oxygen flame burner cooled by water for melting and spraying materials according to the present invention;

Figure 4 A is a cross-sectional view taken along line A- A of Figure 1A; Figure 4B is a cross-sectional view taken along line B-B of Figure 1A; Figure 4C is a cross-sectional view taken along line C-C; Figure 4D is a cross-sectional view taken along line D-D;

Figure 4E is a cross-sectional view taken along line E-E; and Figure 5 is a view illustrating a centre nozzle for spraying a certain material a powder or sludge and a discharging port of a burner body. DESCRIPTIONS OF THE PREFERRED EMBODIMENTS

Figure 1 A is an assembled cross-sectional view illustrating an oxygen flame burner cooled by water for melting and spraying materials according to a first embodiment of the present invention, and Figure 2 is a right side view of Figure 1.

As shown therein, an oxygen flame burner cooled by water for melting and spraying materials according to the present invention includes a burner body 50 in which a plurality of circular columns each having different diameter and lengths are formed in a multiple layer structure with respect to a longitudinal axis wherein a hole is formed in each layer in an axial direction, and a plurality of nozzles 61, 62, 63 and 64 which are engaged with a circular column of each layer for forming one sealed space by connecting the holes fonned in each layer. The above construction will be described in more detail.

As shown in Figure 2, the burner body 50 is formed of a metallic material having a heat-resistance material such as a phosphorus bronze and is fonned in a cylindrical shape. Multiple steps(or circular column layers) are formed in one side of the same, and the other side of the same is fomied in a flat shape. Namely, As shown in Figure 1A and 2, the burner body 50 includes a fuel spraying hole 51 which passes through the centre axis of the same, a plurality of first fuel spraying holes 52 which are formed in a circumferential direction in an outer portion of the fuel spraying hole 51 and pass through the burner body 50 in a longitudinal direction and each includes a certain diameter, a plurality of second fuel spraying holes 53 which are arranged in a circumferential direction in an outer portion of the fust fuel spraying hole 52 and pass through the burner body 50 in a longitudinal direction and each includes a certain diameter, and a plurality of third fuel spraying holes 54 which are arcanged in a circumferential direction in an outer portion of the second fuel spraying hole 53 and pass through the burner body 50 in a longitudinal direction and each includes a certain diameter.

In addition, in the burner body 50, a threaded portion is fonned in an end portion of ach circular colunm. The circular columns of each layer are engaged with the first through fourth nozzles 61, 62, 63 and 64 by the threaded method. Here, the first nozzle 61 includes a raw material support port 61a for supplying a raw material to a raw material spraying hole 51, and a centre nozzle 70 which is arcanged in a centre line of the raw material spraying hole 51 and includes a centre nozzle hole 72 for spraying a compression air or suction gas.

An end portion of the centre nozzle 70 may be differently implemented based on the raw material injected into the raw material supply port 61a. Namely, in the case that the fuel injected into the raw material supply port 61a is formed of fine particles, as shown in Figure 1A, an end portion of the centre nozzle 70 includes a plurality of rotation grooves 73 a in its circumferential surface in order for the raw material to be rotated and discharged from the burner body 50. However, in the case that the fuel injected into the raw material supply port 61a is a liquid state sludge, as shown in Figure 5, the rotation grooves 73a are not fomied in an end portion of the centre nozzle 70.

Here, in the case that an end portion of the centre nozzle 7 which does not have the rotation grooves 73 a is installed in a discharging port of the raw material spraying hole 51, as shown in Figure 5, the discharging port of the raw material spraying hole 51 may be formed in a Iain-down conical shape. An end portion of the centre nozzle which does have the rotation groove 73a is installed near the above Iain-down conical hole 51.

In a plurality of the rotation grooves 73 a formed in the centre nozzle 70, the raw material discharged from the discharging port of the burner body is rotated and sprayed in the flame and collides with the flame, so that the raw material is easily molten.

The above Iain-down conical hole formed in the discharging port of the centre nozzle 70 is capable of spraying the powder or sludge particles from the discharging port of the burner body 50, so that the raw material is easily molten. As shown in Figures 1 A and 4B, the second nozzle 62 includes a first fuel port 62a for supplying a certain fuel to a plurality of the first fuel spraying holes 52, and as shown in Figures 1 A and 4C, the third nozzle 63 includes a second fuel port 63a for supplying a certain fuel to a plurality of second fuel spraying holes 53. hi addition, as shown in Figures 1A and 4D, the fourth nozzle 64 includes a third fuel port 64a for supplying a certain fuel to a plurality of third fuel spraying holes 54.

In addition, as shown in Figure 4E, the burner body 50 includes a cooling chamber S2 in the outennost portion of the same for cooling the same. The cooling chamber 82 includes an inlet S2a for receiving a cooling water into the interior, an outlet 82b for discharging a cooling water to the outside, and a flow path changing pipe 84 installed in the outlet 82a for changing the flow of the cooling water. Therefore, the cooling water supplied to the inlet 82a flows around the third fuel spraying hole 54 of the burner body 50 and passes tlirough the flow path changing pipe 84 and is discharged to the outlet 82b.

In addition, the centre port 61b of the centre nozzle 70 and the fuel material supply port 61a of the first nozzle 61 are provided with different raw materials based on the kinds of the material supplied thereto.

In the case that a liquid sludge such as a process sludge, waste water sludge, sewage sludge, filtration plant sludge, etc. or a liquid raw material such as a heavy metal waste liquid, waste oil, etc. is supplied to the centre port 61b of the centre nozzle 70, a compression air, oxygen or gas fuel(lamp oil, heavy oil A, LNG, LPG, acetylene) is supplied to the raw material supply port 61a of the first nozzle 61.

In the case that a powder material such as alumina, silicic acid, titania, iron oxide, chrome oxide, magnetic components, CaOSiO₂, ilmenite, mullite, etc. is supplied to the raw material supply port 61a of the first nozzle 61 together with a compression air, a gas fuel(lamp oil, heavy oil A, LNG, LPG, acetylene) is supplied to the centre port 70 of the centre nozzle 70.

Oxygen and gas fuel are supplied to the remaining second and third fuel ports. Namely, when a first oxygen is supplied to the first fuel port 62a of the second nozzle 62, and a gas fuel is supplied to the second fuel port 63a of the third nozzle 63, a second oxygen is supplied to the third fuel port 64a of the fourth nozzle 64.

As shown in Figure 3, the water cooling type oxygen burner according to the present invention includes a fixed amount powder supply apparatus 100 for adjusting the amount of a certain raw material like the powder and supplying the compression air of a certain air pressure to the centre port 61b of the first nozzle 61. As shown in Figure 3, the powder supply apparatus 100 includes a hopper 110 which includes an opened upper side and receives a powder therethrough and includes a powder discharging port 112 in the lower portion of the same, an air/powder adjusting nozzle 114 for blowing a compression air having a certain air pressure to the powder discharging port 112 and adjusting the air/powder by adjusting the cross-sectional area of the powder discharging port 112, and an outlet pipe 120 extended to the powder discharging port 112.

Here, an air/powder adjusting nozzle 114 is connected with a pneumatic apparatus like a compressor. Therefore, the powder discharging port 112 and the raw material supply port 61a are connected through the outlet pipe 120. When the pneumatic apparatus operates, a certain air/powder is supplied to the raw material support port 61a. The water cooling type oxygen burner according to the present invention further includes a pressure meter and fixed amount valve in each port for adjusting a supplied fuel and spraying speed of a raw material and the amount of the same.

In the water cooling type oxygen bumer according to the present invention, a powder material of a small specific gravity is supplied to the burner body 50 by a suction force of the air, and the raw material of a large specific gravity is supplied to the burner body 50 by a fixed amount pump.

In the first embodiment of the present invention, the burnet body 50 is directly welded to each nozzle 61, 62, 63 and 64. However, there is a limit in its length for forming a through hole in the bumer body 50, as shown in Figure IB, the bumer body 50 may be connected with each nozzle 61, 62, 63 and 64 using a certain connection member. The above construction will be described in detail.

Figure IB is an assembled cross-sectional view illustrating an oxygen flame burner cooled by water for melting and spraying materials according to a second embodiment of the present invention. As shown therein, the burner body 50 is connected with the first nozzle 61 by a first com ection member 61b, and is connected with the second nozzle 62 by a second connection member 62b, and is connected with a third nozzle 63 by a third connection member 63b, and is com ected with a fourth nozzle 64 by a fourth connection member 64b. The oxygen flame burner cooled by water for melting and spraying materials according to the second embodiment of the present invention operates in the same manner as the first embodiment of the present invention.

The oxygen flame burner cooled by water for melting and spraying materials according to the present invention will be described in detail based on the kinds of the raw material. (1) When a sludge is molten and thennally sprayed at a flame temperature of below 1700°C.

When a sludge is supplied to the centre port 61b of the first nozzle 61, a gas fuel or oxygen is supplied to the raw material supply port 61a of the first nozzle 61, and an oxygen is supplied to the first fuel port 62a, and a gas is supplied to the second fuel port 63 a. However, the third fuel port 64a is not used.

Here, the gas supplied to the second fuel port 63 a is selected from the group comprising lamp oil, heavy oil A, LNG, and LPG. Therefore, the sludge supplied to the centre port 61b is moved in the direction of a melting furnace along the spraying hole 72 of the centre nozzle 70 and is sprayed from the discharging port in minute particles. When oxygen and fuel are supplied from other fuel ports to the melting furnace and then is burned, the sludge sprayed together with the explosion flame is molten. Namely, in the water cooling type oxygen burner according to the present invention, the sludge supplied through the centre nozzle installed in the centre portion is discharged, and the fuel and oxygen discharged tlirough the other fuel holes are mixed with the discharged sludge for thereby forming minute particles, and the above minute particles are collided each other in a high temperature flame and are thermally sprayed. The molten sludge is dropped in the tank installed in the bottom of the melting furnace and is changed to a solid state material.

The discharging gas which is generated when the powder sludge is molten is cooled by air and is filtered by a back filter. In addition, a harmful component such as HCL, Sox, etc. may be further filtered by installing a certain filtering apparatus.

When the oxygen flame burner cooled by water for melting and spraying materials according to the present invention operates, the temperature of the melting furnace is about 1500°C~1600°C, and the temperature of the flame is above 2000°C.

In addition, a discharging gas deodorizing apparatus is further installed together with the melting furnace. Therefore, when the discharging gas deodorizing apparatus operates, the Noz included in the discharging gas is more decreased, and the decomposition ratio of dioxin is above 99.95%. Therefore, in the ingredient of the discharging gas wliich is finally discharged, the dust is below 0.00 lgm, HCL is below lOppm, SOx is below 13ppm, and Nox is below 5ppm. h addition, the dusts from the melting sludge is decreased by about 1/5-2/5.

(2) Coating and hardening processes in which a powder of ceramic, metal, etc. is molten and thermally sprayed at a flame temperature of 1700°C~2700°C.

When the powder of ceramic or metal is supplied to the raw material support port 61a of the first nozzle 61, a gas fuel such as acetylene is supplied to the spraying hole 72 of the centre nozzle through the centre port 61b of the first nozzle 61. In addition, a first oxygen is supplied to the first fuel port 62a, and a gas is supplied to the second fuel port 63a, and a second oxygen is supplied to the third fuel port 64a.

Here, a first oxygen and second oxygen are classified based on the time difference that the oxygen is supplied to a corresponding fuel port. The oxygen winch is first supplied, is called as a first oxygen, and the oxygen which is supplied later is called as a second oxygen. In the embodiment of the present invention, the second oxygen is used for increasing the temperature of 1700°C to a higher temperature when the burner has a set temperature.

The gas supplied to the second fuel port 63 a may be selected from the group comprising LNG, LPG, acetylene, etc. Therefore, in the oxygen flame bumer cooled by water for melting and spraying materials according to the present invention, the fuel discharged from each fuel port is discharged and burned for thereby fonning a high temperature flame, and the powder of ceramic and metal is sprayed into the flame for thereby melting the same, so that the powder is molten in spherical shape and is thermally sprayed to the outside of the flame. At this time, the molten ceramic or metal is thermally sprayed on the surface of a certain object, so that the surface is coated by the ceramic or metal.

When the surface of the object is coated, the end of the burner is distanced from the surface of the object by 10cm~15 cm, and the melting material is sprayed, so that it is possible to form an optimum coat. Here, the speed at the impact plate during the flame coating operation is 2930m/sec, and the number of sprayed particles is about 732/sec, and the speed is 30~46m sec.

At this time, the molten metal is coated as a hardened material on the coating film. In addition, the limit of the average size is properly 5~80 micro meter. The processing ratio of the coating film may be below 10% when the particles are fully molten. In the anti-pressure strength, the alumina is 2600kg/cm~, and zirconia (ZrO₂) is

1470kg/cm². When the coil and steel rod are coated based on an alumina flame spraying method, an insulation coat is formed, so that it can be used against a high temperature. In particular, when it is coated by a ceramic, the melting point is preferably 2200, and the economical thickness is preferably set to 0.25cm.

INDUSTRIAL USE OF THE INVENTION In the oxygen flame burner cooled by water for melting and spraying materials according to the present invention, a lengthy flame is formed using a certain fuel such as gas and oxygen for thereby directly contacting a sludge, waste liquid or powder raw material with the above flame for a long time, so that it is possible to melt for short time. hi addition, in the present invention, it is possible to fomi a high temperature of flame above 1700°C, and it is possible to melt a powder raw material such as ceramic, metal, etc. for a very short time, so that a certain coat is fomied by thermally spraying on the surface of an object. In addition, it is possible to produce a hardened product by pouring the molten material into a certain mould. In the oxygen flame burner cooled by water for melting and spraying materials according to the present invention, it is possible to decrease the melting time by 1/3 and implement a small amount of power consumption compared to the electric melting furnace. Therefore, the oxygen flame burner cooled by water for melting and spraying materials according to the present invention is well adapted to the purposes of 1) adiabatic and heat protection wall, 2) anti-corcosion, 3) insulation, 4) grinding medium, 5) mechamcal seal, 6) radiation adjustment, 7) oxidation prevention wall, 8) metal coating on glass, and 9) metal coating on ceramic. At this time, the fomiation speed of the coating is properly 16~400cm²/hour.

As described above, the preferred embodiments of the oxygen flame burner cooled by water for melting and spraying materials are implemented in such a manner that the powder raw material or liquid raw material is molten together with fuel for thereby being used for forming a solid product or coating a certain object. The present invention may be installed in a melting furnace for melting ingot. In addition, the oxygen flame burner cooled by water for melting and spraying materials may be installed in the melting furnace is a multiple-layer structure, so that the ingot is molten, and a solid product may be fabricated by pouring the molten material into a certain mould.

As the present invention may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, unless otherwise specified, but rather should be constmed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. An oxygen flame burner cooled by water for melting and spraying materials, comprising: a cylindrical bumer body wliich is fomied in a multiple-layer structure in one side of the same, and is fonned in a flat shape in the other side of the same; a cooling chamber which is fomied in an outer portion of the burner body for thereby cooling the bumet body to a certain temperature; a raw material spraying hole which passes through a centre line portion of the burner body in order for certain raw material to flow therethrough; first through third fuel spraying holes which each pass through in a longitudinal direction along a circumferential portion of a corcesponding layer in a direction that a radius is increased with respect to a centre of the raw material spraying hole; first through fourth nozzles which are engaged to the multiple layer portions of the burner body, among the above nozzles, the first nozzle includes a raw material supply port which communicates with the raw material spraying hole and tlirough which a raw material is supplied from the outside, and a centre nozzle which is arcanged in a centre line of the raw material hole and includes a spraying hole for a compression air or suction gas; the second nozzle includes a first fuel port which communicated with the plurality of the first fuel spraying holes; the third nozzle includes a second fuel port which communicates with the plurality of the second fuel spraying holes; and the fourth nozzle includes a third fuel port wliich communicates with the plurality of the third fuel spraying holes.

2. The bumer of claim 1, wherein said fuel supply port of the first nozzle includes a powder supply apparatus which is capable of adjusting the amount of powder and supplying air having a certain air pressure.

3. The burner of claim 2, wherein said powder supply apparatus includes: a hopper which includes an opened upper side and receives powder and includes a powder discharging port in a lower portion of the same; an air/powder adjusting nozzle which supplies an air having a certain pressure to the side of the powder discharging port of the hopper and adjusts a cross-sectional area of the powder discharging port; a connection pipe which connects the powder discharging port and the centre nozzle; and a pneumatic apparatus connected with the air/powder adjusting nozzle.

4. The burner of claim 1, wherein an end portion of the centre nozzle includes a plurality of rotation grooves in a circumferential surface of the same.

5. The burner of claim 1, wherein an end portion of the fuel spraying hole includes a Iain-down conical portion.

6. The burner of claim 1 , wherein said cooling chamber includes: an inlet for receiving a cooling water from the outside; outlets for discharging the cooling water from the cooling chamber to the outside; and a flow path changing pipe which is installed in the outlet for changing the flow of the cooling water.

7. The burner of claim 1, wherein said fuel ports each are connected with a corresponding fuel supply apparatus for supplying a certain fuel from the outside.

8. The burner of claim 1, wherein said fuel supply port of the first nozzle includes a fixed amount pump for supplying a certain material having a large specific gravity.

9. The burner of claim 1, wherein a sludge supplied to the centre port is molten and thennally sprayed by a flame which is fonned by an oxygen or gas fuel supplied to the raw material supply port of the first nozzle, an oxygen supplied to the first fuel port and a gas fuel supplied to the second fuel port.

10. The burner of claim 9, wherein said gas fuel is selected from the group comprising lamp oil, heavy oil A, LNG, LPG.

11. The burner of claim 1 , wherein a powder such as ceramic or metal supplied to the raw material supply port is molten and thermally sprayed by a flame fomied by a gas fuel supplied to the centre port of the first nozzle, a first oxygen supplied to the first fuel port, a gas fuel supplied to the second fuel port and a second oxygen supplied to the third fuel port.

12. The burner of claim 11, wherein said gas fuel is selected from the group comprising lamp oil, heavy oil A, LNG, LPG.

13. An oxygen flame burner cooled by water for melting and spraying materials, comprising: a burner body in which a plurality of circular columns each having different diameters and heights are arcanged in a multiple-layer stmcture with respect to the centre of an axis of the same, a hole are fomied in each layer in an axial direction, and the above holes are fomied in a circumferential direction in multiple numbers; and a plurality of nozzles which are engaged with a circular colunm of each layer for fonning a sealed space by connecting the holes fomied in each layer of the circular column of the bumer body.

14. The burner of claim 13, wherein said burner body includes: a raw material spraying hole which passes through a centre axis of the same; a plurality of first fuel spraying holes which are arcanged in a circumferential direction in an outer portion of the raw material spraying hole and pass through the burner body in a longitudinal direction and each includes a certain diameter; a plurality of second fuel spraying holes which are arcanged in a circumferential direction in an outer portion of the first fuel spraying hole and pass through the burner body in a longitudinal direction and each includes a certain diameter; and a plurality of third fuel spraying holes which are arcanged in a circumferential direction in an outer portion of the second fuel spraying hole and pass through the burner body in a longitudinal direction and each includes a certain diameter.

15. The burner of claim 13, wherein said first nozzle which passes through a centre of the burner body includes: a raw material supply port for supplying a raw material to the raw material spraying hole; and a centre nozzle which is arranged in a centre line of the raw material spraying hole and includes a centre nozzle hole for spraying a compression air or gas fuel.

16. The burner of claim 1, further comprising: a first connection means which includes a certain length and connects the first nozzle and the burner body; a second connection means which includes a diameter larger than that of the first connection means and includes a certain length and connects the second nozzle and the burner body; a third connection means which includes a diameter larger than that of the second connection mans and includes a certain length and connects the third nozzle and the burner body; and a fourth connection means which includes a diameter larger than that of the first connection means and includes a certain length and connects the fourth nozzle and the burner body.

17. The burner of claim 16, wherein said each connection means is fomied of a pipe.