KR100800556B1 - Atmosphere gas heating apparatus for heat treatment equipment - Google Patents

Abstract

An atmospheric gas heating equipment for heat treatment is provided to easily exchange damaged heating elements without stopping the heating equipment, and safely heat the atmospheric gas to a predetermined temperature while heating elements disposed within the heating equipment do not directly come in contact with an atmospheric gas. An atmospheric gas heating equipment(1) for heat treatment comprises: a housing(10) which has a mounting part(13), an inlet(11) that is connected to an atmospheric gas heating chamber, and an outlet; a cover assembly(20) including a support panel(21) which is assembled with the mounting part of the housing, and has a plurality of inserting holes(22) formed therein, and a plurality of sleeves(23) which are disposed in the heating chamber of the housing and have clamping parts in a state that the sleeves are fitted into the inserting holes of the support panel; and bar type heating elements which are inserted into individual sleeves of the cover assembly and have corresponding clamping parts.

Description

Atmospheric gas heater for heat treatment {ATMOSPHERE GAS HEATING APPARATUS FOR HEAT TREATMENT EQUIPMENT}

The present invention relates to a heating apparatus used to heat an atmosphere gas in a heat treatment facility, and more particularly, heating without heating the heating element that is formed of air or various gases formed by various gases without directly contacting. The present invention relates to an atmosphere gas heating device for heat treatment that can reduce the occurrence of an accident and is easy to replace a heating element that is safe and has reached its end of life, and to repair a damaged heating element.

In order to smelt metals of various materials, an atmosphere gas formed of air or gas is used to heat and cool the metal and to heat and cool the metal.

The atmosphere gas is heated to a predetermined temperature or more to heat the metal and then slowly cools the metal to smelt the metal. At this time, the heating apparatus used to heat the atmosphere gas maintains a constant high temperature. High airtightness is required to prevent the atmosphere gas heated inside from being exposed to the outside.

In general, the widely used atmosphere gas heating apparatus is provided with an inlet for introducing atmospheric gas and an outlet for discharging the heated atmosphere gas, and a plurality of heating means for heating the atmosphere gas are provided therein, and power is supplied to the heating means. A power supply unit is provided.

At this time, the atmosphere gas flowing in the heating device and the heating means is in direct contact with the heating means due to the characteristics of the heating device to maintain a high temperature heating means heating for a long time at high temperature heating life is not long and damaged during use Heating means is generated.

In addition, there was a method of indirect heating rather than direct heating of the atmosphere gas, but the conventional heating means of the conventional indirect heating method manufactured to replace the heating means used in the direct heating method increases the manufacturing cost of 3 to 4 times. There was a problem, and in order to obtain the same effect, there was a problem in that a number of heating means should be provided than the direct heating method due to the indirect heating method in which the heat transfer was inferior.

In the direct heating method, the damaged heating means may cause an explosion of atmospheric gas due to an electrical short-circuit in the heating device. After turning off the power of the heating device, the damaged heating means were individually replaced or repaired, and when the number of damaged heating means increased, the entire heating device had to be replaced.

Therefore, in the end, there is a problem that the heating device that must discharge the heated atmosphere gas while maintaining a high temperature must be stopped even if a problem occurs in one heating means. There was a big problem with the economic losses that occur until reheating.

In addition, depending on the temperature required in the smelting process of the metal, at least dozens to hundreds of heating means are combined in one heating device.

In addition, when the number of damages of the heating means increases, when the entire heating apparatus is replaced, the replacement work requires about 2 to 3 days, and at this time, there is a problem in that the whole process is stopped and then worked again.

The present invention is proposed to solve the above problems, it is possible to easily replace the damaged heating element without stopping the heating device, the heating element located inside the heating device is constant even without directly contacting the atmosphere gas It is an object to provide an atmosphere gas heating apparatus for safe heat treatment can be heated to the atmosphere gas at a temperature.

In addition, the heating element and the cover assembly is an object to provide an atmosphere gas heating device for heat treatment that is fastened with a coupling bolt to seal the coupling portion with a high temperature gasket (gasket).

Furthermore, the heating element and the cover assembly are composed of an idle bolt and nut to increase the bonding force and to provide an atmosphere gas heating device for heat treatment excellent in sealing property.

In addition, an object of the present invention is to provide an atmosphere gas heating apparatus for heat treatment that can easily control the heating temperature of the atmosphere gas by adjusting the number of heating elements.

In addition, each sleeve of the cover assembly has an object to provide an atmosphere gas heating apparatus for heat treatment configured in the form of corrugated pipe in order to increase the contact area with the atmosphere gas to contact.

The present invention to solve the above object, the housing having a mounting portion having an inlet and outlet connected to the atmosphere gas heating chamber; A cover assembly coupled to the mounting portion of the housing and having a plurality of fitting holes and a plurality of sleeves coupled to the fitting holes of the support panel and positioned in a heating chamber of the housing and having a fastening portion. ; And bar-type heating elements inserted into individual slip portions of the cover assembly and having corresponding fastening portions. It is made, including.

In addition, the corresponding fastening portion of each heating element is formed with a coupling groove for engaging the coupling bolt on the exposed end, each sleeve fastening portion of the cover assembly is formed a corresponding coupling groove is formed between the corresponding fastening portion and the sleeve fastening portion high temperature gasket It is characterized in that the sealing.

The corresponding fastening portion of each heating element is an idle bolt provided on the exposed end, and each sleeve fastening portion of the cover assembly is made of a nut.

In addition, the corresponding fastening portion of each heating element is a snap (snap) bracket provided on the exposed end, each sleeve fastening portion of the cover assembly is made of a groove to which the snap bracket is coupled.

Furthermore, each sleeve of the cover assembly is formed in the form of a corrugated pipe to improve the contact area with the atmosphere gas.

Further, each sleeve of the cover assembly is characterized in that it further comprises a heat radiation fin to improve the contact area with the atmosphere gas.

Atmospheric gas heating device for heat treatment according to the present invention must maintain a constant internal temperature because the damaged heating elements can be replaced or repaired separately without stopping the heating device when the heating elements heating the atmosphere gas is damaged. It is effective to keep the heating device in an operating state at all times.

In addition, it is possible to control the heating temperature inside the heating apparatus by adjusting the number of heating elements, it is effective to variously control the discharge temperature of the atmosphere gas.

In addition, each sleeve of the cover assembly into which the heating element is inserted increases the contact area with the atmosphere gas, thereby providing excellent thermal efficiency.

Furthermore, indirect heating of a large amount of atmospheric gas can be used as a heat source for various heating devices and heaters. , Gas cooler) and the like can also be used for heating devices and heaters, which require a small amount of heat source, to continuously supply a safe heat source for a long time.

In addition, since the heating temperature of each heating element is higher than the outlet temperature of the desired atmosphere gas in the atmosphere gas heating device, the desired outlet temperature can be obtained without heating the heating element relatively, so that the life of the heating element is long. There is.

Hereinafter, an embodiment of the atmosphere gas heating apparatus for heat treatment according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, the atmosphere gas heating apparatus 1 for heat treatment according to the present invention includes an inlet 11 through which a mounting portion 13 to which the cover assembly 20 is coupled is formed and the atmosphere gas is introduced. A discharge port 12 is formed to be discharged after the introduced atmospheric gas is heated to a predetermined temperature, and a housing 10 including a heating chamber S connected to the inlet 11 and the outlet 12 is provided.

The cover assembly 20 coupled to the mounting portion 13 is coupled to the support panel 21 having a plurality of fitting holes 22 and the fitting holes 22 of the support panel 21 to provide It consists of a plurality of sleeves 23 located in the heating chamber (S) and having a fastening portion (24).

At this time, the heating chamber (S) is composed of a plurality of rooms separated by the inner bracket 15 to induce the flow of the atmosphere gas introduced, the plurality of sleeves 23 located in each heating chamber (S) is one It is coupled to the support panel 21 and inserted.

That is, each support panel 21 can be detachably coupled to the mounting portion 13, the surface is coupled to a plurality of fastening bolts (B) and the mounting portion 13 and the support panel 21 abuts The sealing member 40 may be further included to increase the sealing property so that the problem that the atmosphere gas is leaked to the outside when the atmosphere gas is heated in the heating chamber S may be prevented, and each support panel 21 may be individually exchanged. To do it.

Furthermore, a temperature sensor 14 for checking the internal temperature of the heating chamber S is provided at a predetermined interval so that the damaged heating element 30 can be easily found by checking the temperature of the heating chamber S by position. Make sure

Furthermore, the sleeve 23 formed in the support panel 21 is provided with a fastening portion 24 for sealingly coupling with the heating element 30 inserted therein, and the heating element 30 corresponds to the fastening portion 24. Corresponding fasteners 34 are formed.

At this time, the fastening portion 24 and the corresponding fastening portion 34 are each provided with a nut (N) and a fastening bolt (B), and then the surface where the fastening portion 24 and the corresponding fastening portion 34 abuts is a hot gasket. Seal using a gasket (50).

The gasket refers to a packing that is inserted in order to prevent gas or water from leaking from the contact surface when metal or other materials contact each other, and gaskets of various types and materials exist. COMPRESSED NON-ASBESTOS JOINT SHEET, Asbestos GASKET (GENERAL COMPRESSED ASBESTOS JOINT SHEET), Expanded Graphite GASKET (KLINGER GASKET), Fluoroplastic GASKET (PTFE: Polytetrafluoroethylene), SPIRAL WOUND GASKET, NBR (Nitrile Butadiene Rubber) GASKET, VITON O-RING is used.

The gasket required in the present invention is preferably used to select a gasket excellent in corrosion resistance without heat resistance and temperature change that can withstand a predetermined temperature or more.

The housing 10 is configured to withstand the pressure of the atmosphere gas introduced through the inlet 11 and the temperature at which the atmosphere gas is heated. The inlet atmosphere gas is selected as nitrogen (N) and then inside the housing 10. The pressure and temperature applied are as follows.

Nitrogen gas flow rate = 500㎥ / min (30000㎥ / hr)

Supply design pressure = 1.8KG / ㎠

Nitrogen inlet temperature = 19.8 ℃

Nitrogen outlet temperature = 225 ℃

Surface Expected Temperature of Heating Element = 750 ℃

Nitrogen gas flow rate = 820㎥ / min (49200㎥ / hr)

Supply design pressure = 4.0KG / ㎠

Nitrogen inlet temperature = 25.3 ℃

Nitrogen outlet temperature = 150 ℃

Surface Expected Temperature of Heating Element = 750 ℃ / + 50 ℃

That is, the housing 10 is designed to withstand the nitrogen gas flow rate and pressure applied as described above, and furthermore, adjusts the number of heating elements 30 located in the heating chamber S in accordance with the required nitrogen outlet temperature. do.

In addition, the impurity molecules (MOL-SIEVE BAD) adsorbing impurities such as moisture, carbon dioxide (CO2), and hydrocarbons in the air during the smelting process of metals, in particular, in an oxygen plant process, are treated with high temperature nitrogen at 170 ° C to 230 ° C. In this case, the high temperature nitrogen has a flow rate of 900 m 2 / min, a capacity of 3000 Kw / hr, and the discharge temperature of 230 ° C. should be maintained.

The number of heating elements 30 is selected by adjusting the number of heating elements 30 inserted into the cover assembly 20. The number of heating elements 30 inserted into the individual sleeves 23 can be selected. It can be selected by adjusting the individual sleeve 23 itself.

In addition, the sleeve 23 can be configured to be coupled in any direction before, after, or left, right of the housing 10, so that high thermal efficiency can be obtained without being restricted by the installation place.

Furthermore, as shown in FIG. 4, the heating element 30 and the sleeve 23 are provided with an idle bolt 34a at the exposed end 33 of the heating element 30 and the sleeve 23 is formed. A nut 24a is formed at the fastening part 24 to prevent the power line (not shown in the drawing) from being twisted when the nut 24a is coupled, and the corresponding fastening part 34 has an exposed end. A snap bracket 34b is formed at 33 and the fastening part 24 may be formed as a groove 24b to which the snap bracket 34b is coupled.

At this time, the corresponding fastening portion 34 of the heating element 30 is provided with a bearing 31 so as to smoothly rotate when the heating element 30 revolves, and further, the corresponding fastening portion 34 and the sleeve 23. Each of the fastening portion 24 of the) is further provided with a sealing member 40 to improve the sealing.

The heating element 30 and the sleeve 23 is easy to be coupled and separated, while the coupling and the configuration to ensure that the power line formed in the heating element 30 is not twisted during the coupling and separation, and further ensure the sealing when combined It can be formed by the method.

That is, the bolt and nut or snap bracket is shown as shown in the drawings, which is just one embodiment and various modifications are possible by those skilled in the art.

As shown in FIG. 5A, each sleeve 23 of the cover assembly 20 is in close contact with the heating element 30 inserted therein to transfer the heat of the heating element 30 to the heating chamber S. Atmospheric gas flowing in the heating chamber (S) is in contact with the outside of the sleeve 23 is heated to the atmosphere gas.

In addition, as shown in FIG. 5B, in order to increase the contact area between the sleeve 23 and the atmosphere gas, the sleeve 23 may be formed in the form of a corrugated pipe 26 to increase thermal efficiency.

Furthermore, the heat sink 27 is further formed in the sleeve 23 to increase the area in contact with the atmosphere gas, thereby obtaining a desired heating temperature even with a small number of heating elements 30.

Looking at the bonding state of the atmosphere gas heating apparatus for heat treatment according to the present invention made as described above are as follows.

First, the atmosphere gas introduced from the inlet 11 passes through the heating chamber S. At this time, the heating element 30 located in the heating chamber S is heated, and the heating element 30 is inserted into the sleeve 23 into which the heating element 30 is inserted. The heat is transferred and the sleeve 23 heats the abutting atmosphere gas, and the heated atmosphere gas is sequentially discharged through the outlet 12 by the pressure applied from the inlet 11.

At this time, in order to control the discharge temperature of the atmosphere gas by adjusting the number of heating elements 30 or by partitioning the heating chamber (S) into a plurality of rooms by the internal bracket () to form an atmosphere gas movement path to extend The longer the gas stays in the heating chamber S, the longer the heating time can be obtained to obtain the desired discharge temperature.

Furthermore, in order to replace the damaged heating element 30 generated during long time use, first remove the heating element 30 from the combined sleeve 23 and then insert the heating element 30 to be replaced into the sleeve 23 again. The heating element 30 and the sleeve 23 further comprises a sealing member 40 on the surface abuts and is coupled using a coupling bolt (B) and nut (N).

At this time, the heating element 30 and the sleeve 23 is in contact with the sealing by using the hot gasket 50.

In addition, when the idle bolt 34a and the nut 24a are coupled to each other, the damaged heating element 30 is first removed from the fixed sleeve 23, and then the heating element 30 to be replaced is replaced with the sleeve 23. Insert and rotate the idle bolt (34a) of the corresponding fastening portion 34 formed on the exposed end 33 to replace the tight coupling to the nut (24a) of the sleeve (23).

In addition, by forming the sleeve 23 located in the heating chamber (S) in the form of a corrugated pipe to improve the contact area between the sleeve 23 and the atmosphere gas to increase the thermal efficiency.

Although specific embodiments of the atmosphere gas heating apparatus for heat treatment according to the present invention have been described above with reference to the drawings, the present invention is not limited to these descriptions, and various modifications may be made by those skilled in the art within the scope of the spirit of the appended claims. Modifications and variations are possible, and such modifications and variations should also be construed as falling within the protection scope of the present invention.

1 is a schematic front view of an atmosphere gas heating apparatus for heat treatment according to the present invention;

2 is a rear view of FIG. 1.

3 is a cross-sectional view showing the sleeve and the support panel.

Figure 4 is a cross-sectional view showing an assembled state of assembling the heating element to the sleeve.

5 is a schematic diagram showing a movement path of an atmosphere gas;

6 is a schematic view showing another assembly state of the heating element and the sleeve.

7 is a schematic diagram illustrating another embodiment of a sleeve.

<Description of Major Symbols in Drawing>

1: atmosphere gas heating device for heat treatment 10: housing 11: inlet

12 Outlet 13 Mounting 14 Sensor 15 Inner bracket

S: Heating chamber B: Tightening bolt N: Nut

20: cover assembly 21: support panel 22: fitting hole 23: sleeve

24: fastening portion 24a: nut 24b: groove

30: heating element 31: bearing 33: exposed end 34: mating connection

34a: Static bolt 34b: Snap bracket

40: sealing member 50: gasket

Claims (6)

A housing having a mounting portion, the housing having an inlet and an outlet connected to the atmosphere gas heating chamber; A cover assembly coupled to the mounting portion of the housing and having a plurality of fitting holes, and a plurality of sleeves coupled to the fitting holes of the support panel and positioned in a heating chamber of the housing and having fastening portions; And Bar type heating elements inserted into respective sleeves of the cover assembly and having corresponding fastening portions; Atmospheric gas heating device for heat treatment comprising a. The method of claim 1, The corresponding fastening part of each heating element is a bolt provided at the exposed end, Each sleeve fastening portion of the cover assembly is made of a nut, The atmosphere gas heating device for heat treatment, characterized in that the sealing between the corresponding fastening portion and the sleeve fastening portion with a high temperature gasket (gasket). The corresponding fastening portion of each heating element is an idle bolt provided on the exposed end, Atmospheric gas heating device for heat treatment, characterized in that each sleeve fastening portion of the cover assembly is a nut. The method of claim 1, The corresponding fastening portion of each heating element is a snap bracket provided on the exposed end, Each sleeve fastening portion of the cover assembly is an atmosphere gas heating device for heat treatment, characterized in that the groove to which the snap bracket is coupled. The method according to any one of claims 1 to 4, Each sleeve of the cover assembly is an atmosphere gas heating apparatus for heat treatment, characterized in that the corrugated pipe form to improve the contact area with the atmosphere gas. The method according to any one of claims 1 to 4, Each sleeve of the cover assembly is a heat treatment atmosphere gas heater characterized in that the heat radiation fin is further coupled to improve the contact area with the atmosphere gas.

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