KR101384185B1 - Steel making waste heat recovery device - Google Patents

Abstract

The present invention relates to a waste heat recovering apparatus by using waste heat generated in manufacturing of steel, in which steam and hot water can be produced by employing the waste heat, which is discharged when air-cooling steel manufactured on a steel platform, as a heat source. In more particular, the water heat recovering apparatus includes: a waste heat collecting body provided in the form of a cylinder having a space therein, and placed above the heat source to collect the waste heat through a bottom surface; a plurality of heating pipes including lower and upper pipes communicating with each other in the space of the waste heat collecting body to generate heat as the collected waste heat is conductive; a waste heat receiving body coupled with the upper portion of the waste heat collecting body to receive the waste heat collected through the heating pipes of the waste heat collecting body; and a discharge pipe coupled with an upper end of the waste heat receiving body to discharge waste heat remaining in the waste heat collecting body. Hot waster and steam are obtained without combustion by using waste heat discharged when the steel manufactured on the steel platform is air-cooled so that energy cannot be significantly saved, but also the saving in the cost of the maintenance can be maximized. In addition, a waste heat collecting hood or a waste heat collecting skirt are further provided to directly collect waste heat in the waste heat collecting body and the waste heat receiving body, so that the rate to recovery the waste heat is increased, thereby enhancing energy efficiency. In addition, provided is the waste heat recovering apparatus by using the waste heat generated in manufacturing of steel, which can be installed in any place having a heat source to represent high compatibility, and can be miniaturized in a simple structure, so that the mechanical failure may not occur, so superior efficiency can be represented.

Description

Steel making waste heat recovery device using steel waste heat

The present invention relates to a waste heat recovery apparatus using waste steel that produces steam and hot water as waste heat emitted from the air cooling the steel produced by the steelmaking platform, more specifically, waste heat discharged from the heat source to the waste heat collecting body. The waste heat collection body is configured to receive waste heat collected through the waste heat collecting body, and obtains steam and hot water by using waste heat emitted when air is cooled in steel fabricated by the steelmaking platform, and recovers waste heat. It relates to a waste heat recovery device using steelmaking waste heat.

In the industry, energy consumption can be reduced through development of alternative energy, process efficiency, development of new energy-saving processes, and advanced process control. It requires long periods of development and large investments.

On the other hand, in most industrial processes, a large part of input energy is released as waste heat, and it is well known that a considerable amount of energy is not recovered.

In other words, most of the industry consumes a large amount of energy, so waste heat such as waste gas, waste water, exhaust air, and cooling water is discharged.In particular, large-scale steel mills and heavy chemical plants emit high-temperature waste heat, which can be used as a useful heat source by heat recovery with a heat integrator. .

For example, waste heat generated from high-temperature industries such as domestic steel and steel industry is about 7.2 trillion kcal / year, which is 0.2% of the domestic energy consumption.

Such waste heat generated in a large amount is preferably recovered and recycled in order to reduce fossil energy usage and to regulate global warming gas emissions.

 However, in order to utilize waste heat released into the atmosphere, waste heat must be recovered stably and effectively.

For this reason, various waste heat recovery apparatuses and power generation apparatuses using a large amount of waste heat generated in steelmaking have been proposed. Among them, in Patent No. 10-1193836 (2012.10.17), cooling water is injected into the blast furnace slag supplied into the housing part. A cooling spray unit for cooling the blast furnace slag, an upper portion of the cooling spray unit, a waste heat exchanger for exchanging heat with the waste heat of the blast furnace slag, and a washing spray unit for spraying washing water with the waste heat exchanger; Control unit for controlling the operation of the cooling spray unit and the washing spray unit, the first temperature sensor unit for measuring the temperature of the working fluid supplied to the heat exchanger for the waste heat transfer to the control unit and discharged from the waste heat exchanger And a second temperature sensor unit for measuring a temperature of the working fluid to be transmitted to the control unit, wherein the waste heat The surface of the heat exchanger is a ceramic surface coating, the control unit provided a waste heat recovery device for blast furnace slag for controlling the operation of the first motor provided in the cooling spray unit and the second motor provided in the washing spray unit. .

In addition, Korean Patent No. 10-1187658 (September 26, 2012) shows that the boiler body, which is built from the top in the order of a superheater, a first to fourth evaporator, and a coal cutter, has an upper body with an inlet duct for introducing high-temperature exhaust gas, and exhaust of waste heat. In the lower body with an exhaust duct for assisting, and is arranged between the upper body and the lower body to be divided into a plurality of casing for accommodating each of the evaporator and the carburettor in the array recovery apparatus for steel mills, the casing for each heat exchange function The casing is modularized to form all casings including the upper body and the lower body in a cylindrical shape. The inner circumferential surfaces of the casings for the superheater, the evaporator and the pelletizer are formed with hard castables and adiabatic castables. Heat recovery for steel mills with thermal spray coating on the areas where the exhaust gas may directly rub against the incoming gas The device was provided.

As described above, in the steel mill, since a large amount of waste heat is generated in various states, a waste heat recovery apparatus capable of recovering thermal energy by applying it in place is required, but conventionally, a waste heat recovery apparatus and system composed of large-scale facilities has been provided. The development of waste heat recovery system of size is urgently needed.

The present invention can obtain hot water and steam (steam) without combustion by using the waste heat emitted when the steel produced by the steelmaking platform is air-cooled, which can significantly reduce energy consumption, as well as maintenance costs, the waste heat The waste heat collection hood or waste heat collection skirt that collects waste heat directly on the collecting body and waste heat receiving body increases the recovery rate for waste heat, which is more energy efficient and can be installed wherever there is a heat source. The purpose of this invention is to provide a waste heat recovery device using steel waste heat which is very efficient since there is no fear of mechanical failure since it is possible to miniaturize and simple configuration.

Waste heat recovery apparatus using the steelmaking waste heat according to the present invention is formed in a cylindrical shape having a space therein, located in the upper portion of the heat source waste heat collecting body for collecting waste heat through the bottom, and the lower and upper space in the waste heat collecting body space The heating pipes are formed in communication with each other, and are connected to an upper portion of the waste heat collecting body to heat up as the waste heat collected is conducted, and receives the waste heat collected through the heating pipes of the waste heat collecting body. It is connected to the waste heat receiving body and the upper end of the waste heat receiving body, and includes a discharge pipe for discharging the waste heat staying in the waste heat receiving body, steam and hot water as the heat source to the waste heat released when air cooling the steel produced by the steelmaking platform To construct a waste heat recovery device for producing a spiral heat is received inside the waste heat receiving body, Cold water that includes a hot water for heating in the waste heat.

At this time, the waste heat receiving body according to the present invention may further include a plurality of waste heat collection hoods to collect the waste heat discharged from the heat source, and supply into the waste heat receiving body.

In addition, the waste heat collecting body according to the present invention is connected to the spaced apart along the side of the waste heat receiving body so as to be accommodated therein, and the expansion pipe projecting downward than the bottom of the waste heat collecting body is formed, through the side of the waste heat collecting body The waste heat collection skirt for collecting the waste heat released from the heat source may further include.

And the bottom surface of the waste heat collection body according to the invention can be formed to be bent upward.

delete

In addition, it may further include a water supply means coupled to the upper portion of the waste heat receiving body according to the present invention, for supplying water which is vaporized by the waste heat and converted into steam (steam) into the waste heat receiving body.

Waste heat recovery apparatus using the steelmaking waste heat according to the present invention has the following effects.

First, it is possible to obtain hot water and steam (steam) without combustion by using waste heat emitted when air is cooled in steelmaking platform, thereby providing a waste heat recovery device that not only saves energy but also minimizes maintenance costs. It works.

Second, by further configuring the waste heat collection hood or waste heat collection skirt to directly collect the waste heat in the waste heat collection body and waste heat receiving body can increase the recovery rate for waste heat can provide an energy-efficient waste heat recovery device.

Third, it can be installed anywhere where there is a heat source, not only high compatibility, but also miniaturized and simple configuration, so there is no fear of mechanical failure, it is very efficient.

1 is an exploded perspective view showing the configuration of a waste heat recovery apparatus using waste steel steelmaking according to the present invention.
Figure 2 is an exemplary view showing the configuration of the waste heat recovery apparatus using the steelmaking waste heat in accordance with the present invention.
Figure 3 is an exemplary view showing an embodiment of a waste heat recovery apparatus using the steelmaking waste heat in accordance with the present invention.
Figure 4 is an exemplary view showing an embodiment of a waste heat recovery apparatus further comprising a waste heat collection hood according to the configuration of the present invention.
5 is an exemplary view showing an embodiment of a waste heat recovery apparatus further comprising a waste heat collection skirt according to the configuration of the present invention.
Figure 6 is an exemplary view showing another embodiment of the waste heat recovery apparatus using the steelmaking waste heat according to the configuration of the present invention.
Figure 7 is an exemplary view showing another embodiment of the waste heat recovery apparatus using the steelmaking waste heat according to the configuration of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately The present invention should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, at the time of the present application, It should be understood that variations can be made.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view showing the configuration of the waste heat recovery apparatus using the steelmaking waste heat according to the present invention, Figure 2 is an exemplary view showing the configuration of the waste heat recovery apparatus using the steelmaking waste heat according to the present invention, Figure 3 Figure 4 is an exemplary view showing an embodiment of the waste heat recovery apparatus using the waste heat of steelmaking, Figure 4 is an illustration showing an embodiment of a waste heat recovery apparatus further comprising a waste heat collection hood according to the configuration of the present invention, Figure 5 Exemplary diagram showing an embodiment of the waste heat recovery apparatus further comprises a waste heat collection skirt according to the configuration of Figure 6 is an exemplary view showing another embodiment of the waste heat recovery apparatus using the steelmaking waste heat according to the configuration of the present invention, Figure 7 is an exemplary view showing another embodiment of the waste heat recovery apparatus using the steelmaking waste heat according to the configuration of the present invention.

The present invention relates to a waste heat recovery apparatus using waste steel that produces steam and hot water as waste heat emitted from air cooling the steel produced by the steelmaking platform, the configuration of which is largely the waste heat collecting body (10) and heating The pipe 20, the waste heat receiving body 30, and the discharge pipe (40).

Looking at the configuration of the present invention described above in more detail with reference to the drawings.

First, as shown in FIGS. 1 to 3, the waste heat collecting body 10 constituting the lower portion of the waste heat recovery device has a space inside and a closed upper and lower surfaces thereof, and when the waste heat collecting body 10 is positioned above the heat source, the waste heat. The waste heat is collected through the lower surface of the collecting body 10.

At this time, the bottom surface of the waste heat collecting body 10 may be formed to be bent upward to concentrate the waste heat toward the center side.

In addition, a plurality of heating pipes 20 are arranged at predetermined intervals in the waste heat collecting body 10. The plurality of heating pipes 20 are waste heat by the heating pipes 20 in a tubular shape. The lower surface and the upper surface of the collecting body 10 communicate with each other.

Therefore, the waste heat collected through the bottom surface of the waste heat collecting body 10 by the above configuration is moved to the upper surface side of the waste heat collecting body 10 through the heating pipe 20, and the waste heat is heated pipe 20. As it moves toward the upper surface side, the heat of the waste heat is conducted to the heating pipe 20, the plurality of heating pipes 20 generates heat.

In addition, the waste heat collection body 10 accommodates the water drawn from the outside in the inner space, the water received in the inner space warmed by the waste heat collected by the outer surface and the heating pipe 20 of the waste heat collection body 10 It is provided with a drain pipe 11 to switch to drain.

And it may be further provided with a steam discharge tube 13 for separately discharging the steam (steam) generated by the hot water contained in the waste heat collection body (10).

Therefore, the waste heat collecting body 10 collects waste heat, and heats the water contained in the heat conducted from the waste heat to convert it into hot water.

At this time, the steam generated by the hot water is discharged to the outside through the steam discharge pipe (13).

In addition, the water supply pipe 12 may be further provided so that cold water may be supplied to the internal space of the waste heat collection body 10.

In addition, the waste heat collection body 10 is connected to the upper side of the waste heat collection body 10, the waste heat receiving body 30 constituting the upper portion of the waste heat recovery device, the waste heat receiving body 30 has a predetermined space therein, the upper surface is a round dome shape By receiving the waste heat moved to the upper surface side through the heating pipes 20 of the waste heat collecting body 10 to stay.

And the discharge pipe 40 is connected to the upper end of the waste heat receiving body 30, to discharge the waste heat remaining in the waste heat receiving body 30 to the outside.

Waste heat discharged through the discharge pipe 40 may be bypassed and reused, or may be supplied and used as a heating device.

In addition, the waste heat receiving body 30 is accommodated in the spirally piped hot water pipe 31, one end of the hot water pipe 31 is exposed to the outside, the cold water is introduced, the other end is the waste heat collection body ( Is connected to the upper surface of 10), and supplies water to the internal space of the waste heat collection body (10).

Therefore, as the hot water pipe 31 is accommodated in the waste heat receiving body 30, the hot water is primarily heated by the waste heat remaining in the waste heat receiving body 30, and the hot water converted to the primary heat is converted into the hot water pipe. The hot water supplied into the waste heat collecting body 10 along the 31 is heated secondly by the waste heat collecting body 10 and the heating pipe 20. It is switched to high temperature hot water.

At this time, as shown in Figure 7 by exposing the other end of the hot water pipe 31 to the outside, hot water may be supplied to the outside, through the side of the waste heat collection body 10 of the waste heat receiving body 30 The connection pipe 14 connected to the side is configured to not only cancel the internal pressure generated when the waste heat collection body 10 is heated, but also accommodate the waste heat generated in the waste heat collection body 10. It may be supplied to the body (30).

And in order to maximize the waste heat collection efficiency, as shown in Figure 4 a plurality of waste heat collection hood 60 is mounted on the side of the waste heat receiving body 30, the waste heat discharged from the heat source to the waste heat collection hood ( 60 is collected directly, it can be directly supplied to the waste heat into the waste heat receiving body (30).

In addition, as shown in Figure 5, the waste heat receiving body 30 may be further provided with a waste heat collecting skirt 70, the waste heat collecting skirt 70 is spaced apart along the side of the waste heat receiving body (30) The waste heat collecting body 10 is accommodated therein, and a lower portion of the waste heat collecting skirt 70 is formed with an enlarged portion 71 protruding downward from the lower end of the waste heat collecting body 10. The waste heat discharged may be collected to conduct heat of the waste heat to the side of the waste heat collecting body 10.

And it is possible to ensure a greater amount of steam by generating steam in the waste heat receiving body 30, as shown in Figure 6 to Figure 7 the water supply means on the upper portion of the waste heat receiving body 30 ) Is combined, and when waste heat collected by the waste heat collection body 10 is received, water is supplied to the interior of the waste heat receiving body 30, and the supplied water is vaporized by high temperature waste heat to steam (steam). ).

The water supply means 40 is configured as a nozzle to facilitate the generation of steam (steam) in the waste heat receiving body 30, by supplying the water to be sprayed, to further accelerate the steam conversion of the supply water Can be.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

10: waste heat collection body 11: water pipe
12: drain pipe 13: steam discharge pipe
20: heating pipe 30: waste heat receiving body
31: hot water pipe 40: discharge pipe
50: water supply means 60: waste heat collection hood
70: waste heat collection skirt 71: expansion pipe

Claims (6)

The waste heat collecting body is formed in a cylindrical shape having a space therein and is disposed above the heat source and collects waste heat through the bottom surface, and the waste heat collected is formed in communication with the lower side and the upper side in the space of the waste heat collecting body. A plurality of heating pipes that generate heat as it is conducted and connected to an upper portion of the waste heat collecting body, and connected to an upper portion of the waste heat receiving body and the waste heat receiving body to receive the waste heat collected through the heating pipes of the waste heat collecting body. In the waste heat recovery apparatus that includes a discharge pipe for discharging the waste heat staying in the waste heat receiving body, to produce steam and hot water as a heat source the waste heat emitted when the steel produced by the steelmaking platform air-cooled,
Waste heat recovery apparatus using the steelmaking waste heat spirally accommodated inside the waste heat receiving body, the hot water pipe for heating the cold water introduced from the outside into waste heat.
The method according to claim 1,
And a plurality of waste heat collection hoods mounted on the side of the waste heat receiving body and collecting waste heat discharged from the heat source and supplied into the waste heat receiving body.
The method according to claim 1,
The waste heat collecting body is spaced apart along the side of the waste heat receiving body so as to be accommodated therein, and an enlarged pipe portion protruding downward from the bottom of the waste heat collecting body is formed, and is discharged from the heat source through the side of the waste heat collecting body. Waste heat recovery apparatus using the steelmaking waste heat further comprising a waste heat collection skirt to collect the waste heat.
The method according to claim 1,
Waste heat recovery apparatus using the steelmaking waste heat formed to bend the bottom of the waste heat collecting body upward.
delete The method according to claim 1,
And a water supply means coupled to an upper portion of the waste heat receiving body and supplying water to be converted into steam (steam) by the waste heat into the waste heat receiving body.

Images