KR102303290B1 - Direct heating type hydrogen gas furnace - Google Patents

Abstract

The purpose of the present invention is to provide a hydrogen furnace of a direct heating method to which the heat of a heater is directly applied without a furnace core tube. The hydrogen furnace comprises: a heating part (100) in which a heater (110) is installed, and which has an inlet (120) and an outlet (130) at both ends to braze an object to be processed and filler metal moving on a conveyor unit (10) in a direct heating method; a hydrogen supply part (200) having a hydrogen nozzle (210) to replace an internal space of the heating part (100) with hydrogen (H2); a hydrogen chamber (300) forming a purging space portion (320) on both sides of the heating part (100); and a nitrogen supply part (400) provided with a nitrogen nozzle (410) communicating with the purging space (320) to replace the purging space portion (320) of the nitrogen chamber (300) with nitrogen (N2). In accordance with the present invention, since it is possible to process aviation parts, electronic components, and automatic parts, which are previously limited to vacuum heat treatment and brazing, in a hydrogen furnace with a direct heating method without a furnace core tube, the quality of brazing is enhanced with structural improvements and energy can be greatly saved.

Description

{Direct heating type hydrogen gas furnace}

The present invention relates to a direct heating type hydrogen furnace, and more specifically, to a direct heating type hydrogen furnace in which heater heat is directly applied without a furnace core tube inside a heating unit.

In general, brazing is to join the brazing object to the base material with a filler metal that is melted by constant heat below the melting point. In this brazing, heat is applied below the solidus temperature of the base material and the brazing object is joined to the base material with a filler metal having a liquidus temperature of 450°C or higher, but most brazing systems perform continuous brazing. Continuous furnaces are widely used.

In the brazing system disclosed in the prior art, in Patent Registration No. 10-0581758, the object to be transported by the mesh conveyor is preheated while passing through a preheating tube having a preheater provided with a reciprocating bogie, and then heating connected to the rear of the preheating tube In the continuous atmosphere heat treatment apparatus, which is subjected to atmospheric heat treatment while passing through a furnace core pipe to an atmosphere having a heater, cooled while passing through a cooling pipe connected to the rear of the furnace core pipe, and then discharged, the upper and lower sections of the furnace core pipe to the atmosphere A plurality of pockets that are formed integrally and protrude at equal intervals along the longitudinal direction on one side and made of the same material as the furnace core tube, penetrate the atmosphere passage and are inserted into the pocket, so that one side of the furnace core tube and the pocket A technology including a thermocoupler having a metal cover that directly measures the upper and lower temperatures of the furnace core tube in contact with the inner surface has been previously proposed.

In addition, in another prior art, Patent Laid-Open No. 10-2010-0022884, in the brazing device in which a solvent applying unit, a solvent drying unit, a brazing furnace, and a cooling unit are sequentially provided along the moving direction of the conveyor, the inlet or outlet side of the brazing furnace A technology in which a collection chamber is provided to collect particles or flux in a molten state has been previously disclosed in at least one place of the .

However, the prior art intends to continuously perform the brazing operation, but as shown in FIG. 6 , the conventional brazing furnace is equipped with a furnace core tube (hydrogen tube) 1 to heat the furnace core tube through the heat of the upper and lower heaters, and , there was a problem in that energy efficiency was lowered due to the structural characteristics of brazing the base material using radiant heat transferred to the inside of the furnace core tube.

In addition, in recent years, most of the brazing base material is worked at a high temperature of 1000℃ or higher, so even if the muffle chamber is made of SUS310S, Inconel 600, and 601 materials with excellent heat resistance, cracks due to prolonged exposure to high temperature , cracks occurred and had to be replaced every 3 to 10 months, and the replacement work required at least 7 days at a cost of about 10 million won or more when replacing the furnace core, so there were inevitable disruptions to productivity.

Due to this problem, some industries use a brazing system using LPG without a furnace core tube, but in the case of an LPG brazing system, the fields that can be used are limited. In addition, since preheating time of at least 10 hours is required to operate the LPG furnace, the range of its application is inevitably reduced.

US 10-0581758 B1 (2006.05.12.) US 10-2010-0022884 A (2010.03.03.)

In the present invention, a new technology was created to solve the problems of the prior art, and the aviation parts, electronic parts, and automatic parts, which were conventionally limited to vacuum heat treatment and brazing, are converted into a direct heating type hydrogen furnace without a furnace core. The purpose of this is to provide a direct heating type hydrogen furnace that aims to reduce the material cost of the industry as a whole, reduce the cost of parts, prevent corrosion, increase the strength of the parts industry, and improve energy efficiency by improving the structure to treat it.

Although not separately described, other objects within the scope that can be inferred in consideration of the specific contents and claims for carrying out the following invention are also included in the overall task of the present invention.

In order to achieve this object, a feature of the present invention is that a heater 110 is installed therein, and the inlet and outlet 120 at both ends to braze the processing target and filler metal moving on the conveyor unit 10 in a direct heating method. ) (130) is provided with a heating unit (100); a hydrogen supply unit 200 having a hydrogen nozzle 210 to replace the inner space of the heating unit 100 with hydrogen (H2); A nitrogen chamber ( 300); and a nitrogen supply unit 400 provided with a nitrogen nozzle 410 communicating with the purging space 320 to replace the purging space 320 of the nitrogen chamber 300 with nitrogen (N2). characterized.

At this time, the conveyor unit 10 includes an upward loading section 10A that forms an upward inclination angle toward the inlet 120 side of the heating unit 100, and a horizontal brazing section 10B that moves inside the heating unit 100, and, The heating part 100 is formed as a downward unloading section 10C extending at a downward inclination angle from the outlet 130 side, and the upward loading section 10A is inclined upward toward the heating part 100 inlet 120 side. The heating part 100 is accommodated in the upward multi-chamber 330 connected to the inlet 120, and the downward loading section 10C is a downward multi-chamber 340 extending at a downward inclination angle toward the heating part 100 outlet 130 side. ) accommodated in, and the openings 332 and 342 formed at the ends of the upper and lower multi-chambers 330 and 340 are provided lower than the inlets and outlets 120 and 130 of the heating unit 100 do it with

In addition, a hydrogen ignition unit 500 for burning hydrogen is installed in the opening 332 of the upward multi-chamber 330 to provide a flame to the opening 332 side.

In addition, a horizontal cooling zone 350 is formed between the outlet 130 of the heating unit 100 and the downward multi-chamber 340, and a hydrogen nozzle 210 of the hydrogen supply unit 200 is formed at both ends of the horizontal cooling zone 350. This is installed so that hydrogen or a mixture of hydrogen and nitrogen is supplied, and a heat blocking curtain is formed by the gas pressure injected through the hydrogen nozzle 210 to block the movement of internal heat through the outlet 130 of the heating unit 100 It is characterized in that the object to be processed passing through the horizontal cooling zone 350 is provided to be cooled.

In addition, the heating unit 100, an outer plate 140 forming an outer compartment, and a lower portion comprising a B5 insulating block 151 and a silica insulating block 152 from the inside to insulate the bottom of the heating unit 100 The refractory material 150 and the upper refractory material 160 including the SIB-150 insulating block 161 to be disposed opposite to the upper portion of the heating unit 100 to insulate the upper portion of the lower refractory material 150, the upper and the secondary refractory material 150 ) (160) disposed between the side wall of the heating unit 100 to insulate the side wall from the inside, the SK-36 insulation block 171, the B5 insulation block 172, the side refractory material 170 including the silica insulation block 173 and , the intermediate refractory material 180 including the B7 insulation block 181 to insulate the space between the lower refractory material 150 and the conveyor unit 10, and the lower refractory material 150 both ends and the side refractory material 170 outer surface It is characterized in that it is made of a finished refractory material 190 including the B1 insulation block 191 to be finished integrally.

In addition, the outer plate 140 and the nitrogen chamber 300 supporting the heating unit 100 are formed of at least one type of oxidation-resistant metal among SUS304, SUS310, SUS316, and Inconel.

According to the specific means for solving the above-mentioned problems, the present invention improves the structure so that aviation parts, electronic parts, and automatic parts, which were conventionally limited to vacuum heat treatment and brazing, are processed in a direct heating type hydrogen furnace without a furnace core tube. It has the effect of promoting the growth of the parts industry including reduction of overall material cost, cost reduction of parts, corrosion prevention, and strength increase, and improvement of energy efficiency.

And, as the heating part of the hydrogen furnace forms a composite insulation structure by a combination of the lower refractory material, the upper refractory material, the side refractory material, the intermediate refractory material, and the finished refractory material having different physical properties, it improves the insulation and prevents the deterioration of the brazing quality due to dust, especially Even if pores are formed due to the nature of the refractory material, it is formed at a positive pressure compared to the internal pressure of the purging space to block the outflow of hydrogen supplied to the inside of the heating unit and close the oxygen supply by nitrogen purging to eliminate the possibility of explosion of the furnace and fire refractory. It has the effect of blocking the deterioration of durability due to oxidation of bricks or heaters.

In addition, explosion safety is secured according to hydrogen operation by burning hydrogen discharged from the hydrogen furnace through the upper and lower multi-chambers. Since the amount of hydrogen input into the hydrogen furnace (heating unit) is detected and controlled in real time by visually checking, the brazing quality is improved due to the uniform supply of hydrogen.

In addition, the time for the object to be processed moving on the conveyor is preheated by the thermal power of the hydrogen ignition unit installed in the upward multi-chamber opening to reach a predetermined temperature in the heating unit, and deformation and quality due to sudden temperature change degradation is prevented.

1 is a perspective view showing the whole of a direct heating type hydrogen furnace according to an embodiment of the present invention.
2 is a block diagram showing the internal structure of a direct heating type hydrogen furnace according to an embodiment of the present invention.
Figure 3 is a longitudinal cross-sectional view showing the internal structure of the heating part of the direct heating method hydrogen furnace according to an embodiment of the present invention.
4 is a block diagram showing a cooling zone of a hydrogen furnace of a direct heating method according to an embodiment of the present invention.
5 is a configuration diagram showing an oxidation resistance test result of a metal material used in a direct heating type hydrogen furnace according to an embodiment of the present invention.
6 is a block diagram showing a conventional hydrogen furnace having a core tube (hydrogen tube).

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the present invention, when it is determined that the subject matter of the present invention may be unnecessarily obscured as it is obvious to those skilled in the art with respect to related known functions, the detailed description thereof will be omitted.

1 is a perspective view of a direct heating type hydrogen furnace according to an embodiment of the present invention as a whole, and FIG. 2 is a configuration diagram showing an internal structure of a direct heating type hydrogen furnace according to an embodiment of the present invention.

The present invention relates to a direct heating type hydrogen furnace, which has an improved structure so that aviation parts, electronic components and automatic parts, which were previously limited to vacuum heat treatment and brazing, are processed in a direct heating type hydrogen furnace without a furnace core tube. It is characterized in that it is mainly composed of a heating unit 100 , a hydrogen supply unit 200 , a nitrogen chamber 300 , and a nitrogen supply unit 400 .

First, in the heating unit 100 according to the present invention, a heater 110 is installed therein, and an inlet and an outlet 120 and 130 are provided at both ends, and the processing target and filler materials are moved on the conveyor unit 10 . It is provided for continuous brazing in a direct heating method. The heater 110 is disposed on the conveyor unit 10, respectively, as shown in FIG. 2 , respectively, and is provided to directly heat the object to be processed from the top and the bottom.

At this time, the heater 110 is inserted and installed through the side wall of the heating unit 100, completely blocks the heater insertion portion, and prevents deformation of the nitrogen chamber 300 to be described later due to dissipation heat that may occur.

When hydrogen gas is introduced into the heating unit 100, a separate low alarm and high alarm are installed in the digital flow meter to prevent the flow rate from falling or excessive inflow to completely control the hydrogen gas and use hydrogen gas. to ensure safety.

In addition, the heating unit 100 has a plurality of thermometers installed in the longitudinal direction to detect the temperature for each section, calculate the temperature measured value in the control unit, and adjust the heater output corresponding thereto. control uniformly.

3 is a longitudinal cross-sectional view showing the internal structure of a hydrogen furnace of a direct heating method according to an embodiment of the present invention. 100) The lower refractory material 150 including the B5 insulation block 151 and the silica insulation block 152 from the inside to insulate the floor, and the lower refractory material 150 are disposed opposite to the upper portion of the heating unit 100 to insulate the upper portion SK-36 insulation block ( 171), the B5 insulation block 172, the side refractory material 170 including the silica insulation block 173, and the B7 insulation block 181 to insulate the space between the lower refractory material 150 and the conveyor unit 10. The intermediate refractory material 180 including, and the lower refractory material 150, both ends and the side refractory material 170 are made of a finish refractory material 190 including the B1 insulation block 191 to integrally finish the outer surface.

refractory Temperature note B1 Brick 900℃ Silica Board HPP 1000℃ B5 Brick 1300℃ SK-36 1500℃ High wear resistance, contact with the belt (310S broken mesh form) B7 Brick 1500℃ Finishing part used.
The powder may fall off and contaminate the product. SIB-150 1500℃ Fe trace

<Table showing the operating temperature for each type of refractory material in this office>

In [Table 1], the operating temperature of the insulating blocks constituting the heating unit 100 is 900 °C for the B1 insulating block 191, 1000 °C for the silica insulating block 173, and 1300 for the B5 insulating block 172 ℃, SK-36 insulating block 171, B7 insulating block 181, SIB-150 insulating block 161 has a working temperature of 1500 ℃.

At this time, since the SK-36 insulation block 171 has excellent wear resistance, it is disposed to correspond to both sides of the conveyor unit 10 to protect the inner peripheral surface of the heating unit 100 by friction with the mesh belt.

In this way, the heating unit 100 has a composite insulation structure by a combination of a lower refractory material 150, an upper refractory material 160, a side refractory material 170, an intermediate refractory material 180, and a finish refractory material 190 having different physical properties. Insulation is improved and the quality of brazing due to dust is prevented by forming this is secured

On the other hand, the outer plate 140 is designed to vacuum the entire heating unit 100 in a case method, weld the entire seam to prevent hydrogen gas from leaking to the outside, and the lower portion of the heating unit 100 that can leak to the outside and It is preferable to secure airtightness by using high-vacuum silicone for the non-asbestos packing (30 kg·cm 2 Max - 350° C. Max) on the surface where the upper part of the heating unit 100 abuts.

The conveyor unit 10 is formed of a mesh belt and is configured so that the object to be processed and the filler metal are directly heated from all directions by the heat output from the heater 110 .

At this time, the conveyor unit 10 includes an upward loading section 10A that forms an upward inclination angle toward the inlet 120 side of the heating unit 100, and a horizontal brazing section 10B that moves inside the heating unit 100, and, The heating part 100 is formed as a downward unloading section 10C extending at a downward inclination angle from the outlet 130 side.

In addition, the upward loading section 10A is accommodated in the upward multi-chamber 330 connected to the heating unit 100 inlet 120 while forming an upward inclination angle toward the heating unit 100 inlet 120 side, and the downward loading The section 10C is accommodated in a downward multi-chamber 340 extending at a downward inclination angle toward the outlet 130 of the heating unit 100 .

In addition, the openings 332 and 342 formed at the ends of the upper and lower multi-chambers 330 and 340 are formed at lower positions than the inlets and outlets 120 and 130 of the heating unit 100 . Since hydrogen gas is lighter than oxygen, it has the effect of reducing the amount of gas emission by maximally suppressing the hydrogen filling the inside of the heating unit 100 from flowing out through the inlets and outlets 120 and 130, and the heating unit 100 Oxygen supply to the inside is suppressed, ensuring safety according to hydrogen operation.

In addition, the vertical height of the discharge-side opening 334 is preferably configured to be lower than the height of the input-side opening 332 . This is for balancing the inputted hydrogen gas, because when the position of the input-side opening 332 is higher, the amount of hydrogen gas flowing into the discharge-side opening 334 is increased.

On the other hand, when the wind blows strongly due to the difference in air pressure between indoors and outdoors, explosive combustion of hydrogen can occur when oxygen flows into the inside of the heating unit 100. In order to block the inflow of hydrogen gas and to eliminate the risk factors remaining in the room, a chimney is installed at the inlet and outlet 120 and 130 of the hydrogen to facilitate the combustion of hydrogen gas, so that the hydrogen gas does not remain in the room. It is also possible to configure not to.

A hydrogen ignition unit 500 for burning hydrogen is installed in at least one of the upper and lower multi-chambers 330, 340, and openings 332 and 342, so that the openings 332 and 342 have a flame on the side. can be configured to provide

Since the thermal power of the ignition unit 500 is directly proportional to the hydrogen input amount, when configured as described above, the hydrogen ignition unit 500 By visually checking the thermal power, the change in the amount of hydrogen gas input into the heating unit 100 can be checked in real time. For example, since the thermal power is reduced when the gas supply is less than the set input amount, the brazing quality can be improved by promoting a uniform supply of hydrogen.

Furthermore, the object to be processed riding on the conveyor unit 10 is preheated by the thermal power of the hydrogen ignition unit 500 installed in the opening 332 of the upward multi-chamber 330 , and is heated in the heating unit 100 . The time to reach the temperature is shortened, and deformation and quality deterioration due to sudden temperature change are prevented.

The hydrogen supply unit 200 according to the present invention is provided with a hydrogen nozzle 210 to replace the inner space of the heating unit 100 with hydrogen (H _{2 ).} The hydrogen supply unit 200 is directly supplied by installing a hydrogen nozzle 210 to penetrate the refractory material of the heating unit 100, or by installing a hydrogen nozzle 210 at the outlet side of the heating unit 100 as shown in FIG. 4 to supply hydrogen. An indirect supply configuration is also possible.

The nitrogen chamber 300 according to the present invention is disposed to have a purging space 320 filled with nitrogen gas at both sidewalls of the heating unit 100 , and the amount of the heater 110 coupled through the heating unit 100 . formed to receive an end. Since the nitrogen chamber 300 is filled with nitrogen at a higher pressure than the internal pressure of the heating unit 100 through the nitrogen supply unit 400 to be described later, the leakage of hydrogen gas through the heater 110 penetration is blocked.

A casing installed so that the door panel can be opened and closed is formed on the outside of the nitrogen chamber 300 to provide convenience according to maintenance, and each panel is hermetically treated by high vacuum heat-resistant silicone.

The nitrogen supply unit 400 according to the present invention is provided to supply nitrogen gas into the purging space 320 of the nitrogen chamber 300, and the purging space 320 of the nitrogen chamber 300 is replaced with nitrogen (N). ₂ ) A plurality of nitrogen nozzles 410 are spaced apart from each other in the nitrogen chamber 300 so as to communicate with the purging space 320 to replace them.

With the configuration as described above, nitrogen is injected into the nitrogen chamber 300 to prevent the hydrogen gas from leaking to the outside and to prevent external oxygen from flowing into the heating unit 100 , thereby dissipating heat and introducing external air. will be suppressed by 100%. At this time, the nitrogen input amount is controlled so that the internal pressure of the nitrogen chamber 300 does not fall below atmospheric pressure.

As such, by the nitrogen injected through the nitrogen nozzle 410 of the nitrogen supply unit 400 , the pressure of the purging space 320 is formed to be a positive pressure compared to the internal pressure of the heating unit 100 , and hydrogen supplied into the heating unit 100 . Explosion safety is secured by blocking the outflow of gas and oxygen supply by nitrogen purging.

4 is a block diagram showing a cooling zone for a hydrogen furnace of a direct heating method according to an embodiment of the present invention. Between the outlet 130 of the heating unit 100 and the downward multi-chamber 340, a horizontal cooling zone 350 ) is formed, and the hydrogen nozzles 210 of the hydrogen supply unit 200 are installed at both ends of the horizontal cooling zone 350 to supply hydrogen or a mixed gas of hydrogen and nitrogen.

Accordingly, a heat blocking curtain is formed by the gas pressure injected through the hydrogen nozzle 210 to block the flow of internal heat through the outlet 130 of the heating unit 100, thereby improving energy efficiency and a horizontal cooling zone 350. The object to be treated is rapidly cooled while passing through and as soon as it reaches the opening 342 of the downward multi-chamber 340, it can move to the next process, thereby improving productivity due to the continuous process.

The outer plate 140 and the nitrogen chamber 300 supporting the heating unit 100 are formed of at least one type of oxide-resistant metal among SUS304, SUS310, SUS316, and Inconel. Due to the nature of the heating unit 100 of the direct heating method, the metal panels are directly exposed to hydrogen and have a structure in contact with the heater and the refractory material, so stability against hydrogen gas brittleness must be secured.

5 is a configuration diagram showing the oxidation resistance test result of a metal material used in a direct heating type hydrogen furnace according to an embodiment of the present invention, the conditions are 10 days at 800 ℃, Figure 5 (a) is SUS304 , (b) is SUS310, (c) is SUS316, (d) is Inconel.

As a result of the oxidation resistance test on SUS304, SUS310, SUS316, and Inconel alloy, it can be seen that Inconel has the best oxidation resistance and SUS316 is superior to SUS304 or SUS310. (Consignment institution: Materials Research Institute affiliated with the Korea Institute of Machinery and Materials) [Table 2] to [Table 9] below show the direct heating type hydrogen furnace without a furnace core tube and the hydrogen furnace with the conventional furnace core tube (hydrogen furnace) of FIG. time to reach 0°C (basic temperature) to 400°C (400°C/hr), time to reach 400°C to 800°C, time to reach 800°C to 1000°C, time to reach 1000°C to 1140°C This is a table showing how much energy saving is possible by checking the responsiveness and power consumption.

<Table showing the test result of reaching ~400℃ using the direct heating type hydrogen furnace of this institute>

<Table showing the test results of reaching ~400 °C using a brazing furnace equipped with a conventional furnace core tube (hydrogen tube) of FIG. 6>

<Table showing the test results of reaching 400 ~ 800℃ using the direct heating type hydrogen furnace of this institute>

<Table showing the test results of reaching 400 to 800°C using a brazing furnace equipped with a conventional furnace core tube (hydrogen tube) of FIG. 6>

<Table showing the test results of reaching 800 ~ 1000℃ using the direct heating type hydrogen furnace of this institute>

<Table showing the results of the 800 ~ 1000 ℃ reaching test using a brazing furnace equipped with a conventional furnace core tube (hydrogen tube) of FIG. 6>

<Table showing test results of reaching 1000 ~ 1140℃ using our direct heating type hydrogen furnace>

<Table showing the test results of reaching 1000 to 1140 ° C using a brazing furnace equipped with a conventional furnace core tube (hydrogen tube) of FIG. 6>

The above table is a test of the time required to rise to the 1140℃ temperature that can actually be brazed. With our direct heating method, it takes 14 to 15 minutes to reach ~400℃ with the conventional furnace core tube (hydrogen tube). It can be seen that the brazing furnace equipped with ) rises 12 to 13 minutes faster than reaching 26 to 28 minutes. In addition, it takes about 1 hour to reach 400°C to 800°C with the direct heating method of the present application, whereas the conventional brazing furnace equipped with a core tube (hydrogen tube) reached 800°C in over 1 hour and 30 minutes.

That is, as a result of checking up to 800 ° C, it takes about 1 hour 55 to 2 hours to 800 ° C in a brazing furnace equipped with a conventional furnace core tube (hydrogen tube), whereas the direct heating method of the present invention takes about 1 hour and 15 minutes. However, it showed a quick response of about 40 minutes or more, and the quick response means that the power consumption was also reduced, resulting in energy saving of about 30~35%.

In addition, the time to raise the temperature to 1140 ℃ for actual brazing, from 800 ℃ to 1140 ℃, it took about 1 hour and 15 minutes with the direct heating method of the present company. is 2 hours and 40 minutes, and it can be seen that there is a difference of more than 1 hour and 20 minutes.

Summarizing the above test results, the response to 1140°C took 2 hours 30 to 40 minutes with the hydrogen of our direct heating method, and 4 hours 40 minutes with the conventional brazing furnace equipped with a core tube (hydrogen tube), about 2 hours. There is a difference in degree, and as a result, power consumption can also be reduced by about 35-40%.

As such, the quality of aviation parts, electronic parts, and automatic parts, which were previously limited to vacuum heat treatment and brazing, is made possible in the direct heating type hydrogen furnace without a furnace core tube. It has the advantage of promoting the growth of the parts industry including prevention, strength increase, and energy efficiency improvement.

As described above, in the detailed description of the present invention, the most preferred embodiment of the present invention has been described, but various modifications may be made within the scope not departing from the technical scope of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but the protection scope should be recognized from the techniques of the claims to be described later and equivalent technical means from these techniques.

10: conveyor unit 10A: upward loading section
10B: Horizontal brazing section 10C: Down loading section
100: heating unit 110: heater
120, 130: inlet, outlet 140: outer plate
150: lower refractory material 151: B5 insulation block
152: silica insulation block 160: upper refractory material
161: SIB-150 insulation block 170: side refractory
171: SK-36 insulation block 172: B5 insulation block
173: silica insulation block 180: intermediate refractory material
181: B7 insulation block 190: finished refractory material
191: B1 insulation block
200: hydrogen supply unit 210: hydrogen nozzle
300: nitrogen chamber 320: purging space part
330: upward multi-chamber 332, 342: opening
340: downward multi-chamber 350: horizontal cooling zone
400: nitrogen supply unit 410: nitrogen nozzle
500: hydrogen ignition unit

Claims (6)

A heater 110 is installed inside, and a heating unit 100 having inlets and outlets 120 and 130 at both ends to braze the processing target and filler metal moving on the conveyor unit 10 in a direct heating method. ;
a hydrogen supply unit 200 provided with a hydrogen nozzle 210 to replace the inner space of the heating unit 100 with hydrogen (H _{2 );}
a nitrogen chamber 300 disposed to have a purging space 320 filled with nitrogen gas on both sidewalls of the heating unit 100 and formed to accommodate both ends of the heater 110; and
A nitrogen supply unit 400 provided with a nitrogen nozzle 410 communicating with the purging space 320 to replace the purging space 320 of the nitrogen chamber 300 with nitrogen (N _{2 );}
The conveyor unit 10 is composed of an upward loading section (10A), a horizontal brazing section (10B), and a downward unloading section (10C),
The downward loading section (10C) is accommodated in the downward multi-chamber 340 extending at a downward inclination angle toward the heating unit 100, the outlet 130 side,
A horizontal cooling zone 350 is formed between the outlet 130 of the heating unit 100 and the downward multi-chamber 340, and hydrogen nozzles 210 of the hydrogen supply unit 200 are installed at both ends of the horizontal cooling zone 350. and hydrogen or a mixed gas of hydrogen and nitrogen is supplied,
The heat blocking curtain is formed by the gas pressure injected through the hydrogen nozzle 210 to block the movement of internal heat through the outlet 130 of the heating unit 100, and the object to be treated passing through the horizontal cooling zone 350 is Direct heating type hydrogen furnace, characterized in that provided to be cooled.
delete The method of claim 1,
The openings 332 and 342 formed at the ends of the upper and lower multi-chambers 330 and 340 are provided lower than the inlets and outlets 120 and 130 of the heating unit 100,
A direct heating type hydrogen furnace, characterized in that a hydrogen ignition unit 500 for burning hydrogen is installed in the opening 332 of the upward multi-chamber 330 to provide a flame to the opening 332 side.
delete The method of claim 1,
The heating unit 100 is a lower refractory material ( 150), and the upper refractory material 160 including the SIB-150 insulating block 161, disposed opposite to the upper portion of the lower refractory material 150 to insulate the upper portion of the heating unit 100, and the upper and lower refractory materials 150 (150) ( 160) disposed between the side walls of the heating unit 100 to insulate the sidewall of the refractory unit 170 from the inside, including the SK-36 insulation block 171, the B5 insulation block 172, and the silica insulation block 173, and the lower portion The intermediate refractory material 180 including the B7 insulation block 181 to insulate the space between the refractory material 150 and the conveyor unit 10, and the lower refractory material 150, both ends and the side refractory material 170, the outer surface integrally A direct heating type hydrogen furnace, characterized in that it is made of a finished refractory material (190) including a B1 insulation block (191) to finish.
6. The method of claim 5,
A direct heating type hydrogen furnace, characterized in that the outer plate 140 and the nitrogen chamber 300 supporting the heating unit 100 are formed of at least one type of oxide-resistant metal among SUS304, SUS310, SUS316, and Inconel.

Images