KR101749253B1 - Coke drying device for blast furnce bin - Google Patents

Coke drying device for blast furnce bin Download PDF

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Publication number
KR101749253B1
KR101749253B1 KR1020150176922A KR20150176922A KR101749253B1 KR 101749253 B1 KR101749253 B1 KR 101749253B1 KR 1020150176922 A KR1020150176922 A KR 1020150176922A KR 20150176922 A KR20150176922 A KR 20150176922A KR 101749253 B1 KR101749253 B1 KR 101749253B1
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KR
South Korea
Prior art keywords
hot air
coke
air discharge
unit
movable
Prior art date
Application number
KR1020150176922A
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Korean (ko)
Inventor
이환희
김승보
Original Assignee
주식회사 포스코
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Priority to KR1020150176922A priority Critical patent/KR101749253B1/en
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Publication of KR101749253B1 publication Critical patent/KR101749253B1/en

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    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
    • C10B57/10—Drying
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
    • C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The present invention provides a coke oven comprising a coke charging unit for supplying coke to a coke oven, a hot air supply unit for supplying hot air into the coke oven, and a plurality of hot air discharging units for discharging hot air supplied from the hot air supply unit into the coke oven. There is an effect that the coke drying efficiency can be increased by providing a coke drying device stored in a blast furnace including a fixed hot air discharge portion fixed to the bin and a movable hot air discharge portion movable up and down in the coke bin.

Description

Coke drying device for blast furnace bin

The embodiment relates to a coke drying apparatus stored in a blast furnace for drying a coke temporarily stored in bin before blast furnace charging.

The coke to be blasted in the blast furnace not only serves as a heat source for reducing iron ore in the furnace and reacting with oxygen in the hot air to generate energy, but also maintaining the air permeability between the raw materials (sinter or light).

In the Hwaseong process, the coke is produced in the form of fine coke (size of 25-75 mm, suitable for use in blast furnaces, considering the air permeability and reactivity in the blast furnace), and the coke is used for dry distillation and dry fire extinguishing (CDQ) After the digestion process, it is mixed with the blast furnace bin. The reason for the coke extinguishing is to move the coke to the belt conveyor. Especially, the reason for using the dry fire extinguishing system (CDQ) is to prevent the decrease of the strength due to the rapid temperature change of Coke due to water spray. After this process, the water content of the coke before the blast furnace is measured is about 0.2%.

However, when the CDQ plant is under regular repair or trouble, Coke (Yard Coke), which is placed in self-wetting Coke or yard (external storage space), is sprayed directly from the digester tower. These coke contain a large amount of water (moisture content: 5 ~ 7%), which adversely affects the operation.

First, after the charging in the furnace, the reduction of the heat is reduced and the fusing zone is reduced, thereby suppressing the reduction and melting reaction of the charge, and the moisture is evaporated in the furnace, thereby increasing the volume and causing the coke differentiation. As a result, the ventilation of the furnace and the outlet are adversely affected, resulting in cost increase and operating loss.

Embodiments provide a coke drying apparatus having a hot air supply unit capable of moving up and down in a coke oven to improve the coke drying efficiency.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned here can be understood by those skilled in the art from the following description.

An embodiment of the present invention is a coke oven comprising: a coke charging unit for supplying coke to a coke oven; A hot air supply unit for supplying hot air into the coke bins; And a plurality of hot air discharge units for discharging the hot air supplied from the hot air supply unit into the coke bins, wherein the hot air discharge unit includes a fixed hot air discharge unit fixed to the coke bins, and a movable hot air discharge unit movable inside the coke bins It provides a coke drying device stored in the blast furnace bin.

The hot air discharge unit may have a cylindrical shape, and the hot air discharge unit may have an inner space through which hot air can move.

The hot air discharge unit may include a plurality of hot air discharge holes.

The hot air discharge holes may be formed at regular intervals on the upper surface and the lower surface of the hot air discharge portion.

The fixed hot air discharge portion is fixed to the lower portion of the coke baffle and the movable hot air discharge portion can move up and down along the inner peripheral surface of the coke can at the upper portion of the coke can.

The hot air supply unit can use hot air entering the inside of the blast furnace.

And a hot air circulating unit for circulating hot air inside the coke bins.

The hot air circulation unit includes a suction port formed at an upper portion of the coke breeze and a discharge unit formed at a lower portion of the coke bubble. The suction port and the discharge unit are connected by a pipe, and the circulation drive unit circulates the hot air.

The hot air supply unit and the hot air discharge unit are connected by a hot air supply pipe. The hot air supply pipe may be separated from one pipe and connected to the fixed hot air discharge unit and the movable hot air discharge unit, respectively.

The hot air supply pipe connected to the movable hot air discharge unit is provided with an expanding portion, and the expanding portion can be changed in length according to the movement of the movable hot air discharge portion.

According to the embodiment, there is an effect that the hot air supply portion moves up and down to increase the drying efficiency of the coke.

In addition, there is an effect that the cost can be reduced by using surplus hot air supplied to the blast furnace.

In addition, the hot air used for drying can be circulated in the coke bin to maximize drying efficiency.

The various and advantageous advantages and effects of the present invention are not limited to the above description, and can be more easily understood in the course of describing a specific embodiment of the present invention.

1 is a view showing a structure of a coke drying apparatus stored in a blast furnace according to an embodiment of the present invention,
2 is a view showing a structure in which hot air is supplied from the hot air supply unit.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the embodiments of the present invention are not intended to be limited to the specific embodiments but include all modifications, equivalents, and alternatives falling within the spirit and scope of the embodiments.

Terms including ordinals, such as first, second, etc., may be used to describe various elements, but the elements are not limited to these terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the embodiments, the second component may be referred to as a first component, and similarly, the first component may also be referred to as a second component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the embodiments of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

In the description of the embodiments, in the case where one element is described as being formed "on or under" another element, the upper (upper) or lower (lower) or under are all such that two elements are in direct contact with each other or one or more other elements are indirectly formed between the two elements. Also, when expressed as "on or under", it may include not only an upward direction but also a downward direction with respect to one element.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings, wherein like or corresponding elements are denoted by the same reference numerals, and redundant description thereof will be omitted.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a first embodiment of the present invention; Fig. 2 is a cross-sectional view of a first embodiment of the present invention; Fig. It does not need to be.

1 is a view showing a structure of a coke drying apparatus stored in a blast furnace according to an embodiment of the present invention.

Referring to FIG. 1, the coke drying apparatus 1 stored in the blast furnace may include a coke charging unit 200, a hot air supply unit 300, a hot air discharge unit 400, and a hot air circulation unit.

The coke drying apparatus 1 stored in the blast furnace can dry the coke to increase the operating efficiency. When the coke supplied into the blast furnace contains a large amount of water, the blast furnace operation is adversely affected. When the coke supplied to the blast furnace contains moisture, the reduction of the thermal deformation and the fusing zone are reduced to suppress the reduction and the melting reaction of the charge charged into the blast furnace, and the volume increases as the water evaporates in the furnace, . As a result, it will adversely affect the ventilation and outlet of the furnace, resulting in cost increase and operating loss.

The coke charging unit 200 supplies coke to the inside of the coke bins 100. The coke charging unit 200 supplies coke containing moisture to the inside of the coke bins 100, and various methods and structures can be used.

The hot air supply unit 300 supplies hot air into the coke oven 100 and removes moisture of coke supplied from the coke charging unit 200. In one embodiment, the hot air supply unit 300 may utilize excess hot air supplied to the blast furnace. This is explained in detail below.

The hot air discharge unit 400 is located inside the coke oven 100 and can discharge the hot air supplied from the hot air supply unit 300 into the coke oven 100. A plurality of hot air discharge units 400 may be provided in the coke bins 100 to increase the drying efficiency of the coke.

The hot air discharge part 400 is provided in a cylindrical shape and an internal space through which hot air can move is formed inside the hot air discharge part 400. The outer wall of the hot air discharge unit 400 has a predetermined thickness and the inner spaces 412 and 422 are formed inside the outer wall so that hot air supplied from the hot air supply unit 400 can be moved. The hot air discharge unit 400 and the hot air supply unit 300 may be connected by a hot air supply pipe 310. The hot air supply unit 300 is connected to one area of the outer wall of the hot air discharge unit 400 to supply hot air to the inner spaces 412 and 422 of the hot air discharge unit 400.

A plurality of hot air discharge holes 413 and 423 may be formed in the hot air discharge portion 400. The hot air discharge holes 413 and 423 are formed at regular intervals in the hot air discharge part 400 to uniformly heat the coke coming into the coke bins 100. For example, the hot air discharge holes 413 and 423 are arranged at regular intervals on the upper surface and the lower surface of the hot air discharge portion 400 to uniformly heat the coke introduced into the coke bins 100.

The hot air discharge unit 400 may include a fixed hot air discharge unit 410 and a movable hot air discharge unit 420.

The fixed hot air discharge unit 410 is fixed to the bottom of the coke bins 100 to discharge hot air. For example, the fixed hot air discharge unit 410 may be formed in the shape of a truncated cone below the coke bins 100, and may be modified into various shapes depending on the position fixed to the coke bins 100.

The movable hot air discharge unit 420 can move up and down within the coke bins 100. The movable hot air discharge unit 420 may be connected to the driving unit 600 to move up and down. A plurality of rails (not shown) may be formed on the inner surface of the coke bins 410 for movement. Although the movement direction of the movable hot air discharge unit 420 is shown as an up and down direction, the present invention is not limited thereto, and the movable hot air discharge unit 420 may be arranged to move in the left, right, up and down directions as well.

The fixed hot air discharge unit 410 and the movable hot air discharge unit 420 may be connected to the hot air supply unit 300 for supplying hot air and the hot air supply pipe 310. The hot air supply pipe 310 may be provided with a valve 350 for regulating the supply amount of hot air. A plurality of hot air supply pipes 310 may be connected to each of the movable hot air supply unit 420 and the fixed hot air supply unit 410 and may be divided into a plurality of units for distributing hot air from one pipe. The hot air supply pipe 310 connected to the movable hot air discharge unit 420 may be provided with an expansion unit 320 to move according to the movement of the hot air discharge unit 420.

The extension part 320 can increase the length of the hot air supply pipe 310 so that the movable hot air discharge part 420 can move together when the movable hot air discharge part 420 moves upwardly on the basis of the case where the movable hot air discharge part 420 is positioned at the lowermost part . For example, the extension 320 may have a structure in which a plurality of pipes are combined to change the length, and may have a bellows structure to increase or decrease the length of the extension 320. The structure of the extension 320 is not limited, and various tube structures that can vary in length can be used.

The coke oven 100 has a connection portion (not shown) for interlocking the movements of the hot air discharge portion 420 and the hot air supply pipe 310. The connection part (not shown) may move together with the movement of the movable hot air discharge part 420 to have a structure in which the movable hot air discharge part 420 and the hot air supply pipe 310 interlock with each other. In an embodiment, the connection part (not shown) may be formed of a pleated structure or a sliding structure, and a packing structure may be provided in the connection part to prevent heat from leaking into the coke bins 100. There is no restriction on the structure or shape of the connection portion, and various structures for moving together with the plurality of structures can be used.

The hot air blown out from the hot air discharge hole 423 formed in the lower part of the movable hot air discharge part 420 and the hot air discharge hole 413 formed in the upper part of the fixed hot air discharge part 410 are respectively located between the hot air discharge parts Coke can be dried. At this time, the wind between the hot air blowing portions can be rotated by the wind interaction. This movement can solve the drying problem of the coke located in the blind spot of the structure and can increase the overall drying efficiency of the coke.

The hot air circulation unit circulates the hot air inside the coke oven 100, thereby improving the drying efficiency of the coke. The hot air circulation part may include a suction part 510 and a discharge part 520 and the suction part 510 and the discharge part 520 may be connected to the pipe 530. The pipe 530 may be provided with a valve 550 for controlling the amount of hot air circulated. A circulation driving unit 540 for circulating the hot air inside is connected to one side of the pipe 530 and the circulation driving unit 540 regenerates the hot air inside the coke oven 100 through the suction unit 510, So that hot air can be re-blown into the coke oven 100 through the discharge part 520. [ For example, the suction unit 510 is located above the coke bins 100, and the discharge unit 520 is positioned below the fixed hot air discharge unit 410 to increase the range of the circulating hot air, thereby maximizing the drying efficiency can do.

2 is a view showing a structure in which hot air is supplied from the hot air supply unit.

Referring to FIG. 2, the hot air supply unit 300 may utilize hot air entering the interior of the blast furnace. Generally, in the blast furnace for producing steel, there is a blower which generates hot air to be supplied into the furnace of the blast furnace. The hot air generated by the blower passes through the hot air path (heat storage chamber, combustion chamber, mixed air chamber) and into the blast furnace.

The provision of separate blowers for supplying hot air to the coke bins increases the cost, so hot air generated in the blower can be used to supply hot air into the coke bins. At this time, the hot air supply unit can receive hot air by connecting a new line 340 to a line for supplying hot air to the blast furnace.

The present invention will now be described more fully with reference to the accompanying drawings, in which exemplary embodiments of the invention are shown.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be. Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1: Coke drying device for coke
100: coke bean
200: Coke charging part
300: Hot air supply part
310: Hot air supply pipe
320: Extension
340: New line
350, 550: valve
400:
410: Fixed hot air blower
412, 422: inner space
413, 423: Hot air discharge hole
420: movable hot air blower
510:
520:
530: tube
540:
600:

Claims (10)

A coke charging section for supplying coke to the inside of the coke bin;
A hot air supply unit for supplying hot air into the coke bins; And
And a plurality of hot air discharge units for discharging the hot air supplied from the hot air supply unit into the coke bins,
The hot air discharge unit includes a fixed hot air discharge unit fixed to the coke bins and a movable hot air discharge unit movable inside the coke bins,
The fixed hot air discharge portion is fixed to the lower inside of the coke bins,
Wherein the movable hot air discharge portion is moved up and down along the inner circumferential surface of the coke bake at the upper inside of the coke breeze. The method according to claim 1,
The hot air discharge portion is provided in a cylindrical shape,
Wherein the hot air discharge unit has an inner space through which hot air can be moved. 3. The method of claim 2,
Wherein the hot air discharge unit is provided with a plurality of hot air discharge holes. The method of claim 3,
And the hot air discharge holes are formed in the upper and lower surfaces of the hot air discharge portion at regular intervals. delete The method according to claim 1,
Wherein the hot air supply unit is installed in a blast furnace using hot air entering the interior of the blast furnace. The method according to claim 1,
Further comprising a hot air circulating unit for circulating hot air inside the coke bins. 8. The method of claim 7,
The hot-
An inlet formed above the coke baffle and an outlet formed in the lower portion,
Wherein the inlet port and the outlet port are connected to each other by a pipe, and the circulating driving unit circulates internal hot air. The method according to claim 1,
The hot air supply unit and the hot air discharge unit are connected by a hot air supply pipe,
Wherein the hot air supply pipe is separated from one pipe and connected to the fixed hot air discharge unit and the movable hot air discharge unit, respectively. 10. The method of claim 9,
The hot air supply pipe connected to the movable hot air discharge unit is provided with an expansion part,
And the extension portion is stored in a furnace bin whose length changes according to the movement of the movable hot air discharge portion.
KR1020150176922A 2015-12-11 2015-12-11 Coke drying device for blast furnce bin KR101749253B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150176922A KR101749253B1 (en) 2015-12-11 2015-12-11 Coke drying device for blast furnce bin

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Application Number Priority Date Filing Date Title
KR1020150176922A KR101749253B1 (en) 2015-12-11 2015-12-11 Coke drying device for blast furnce bin

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KR101749253B1 true KR101749253B1 (en) 2017-06-20

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020122634A3 (en) * 2018-12-12 2020-08-06 주식회사 포스코 Coke dry quenching method in cdq equipment

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020122634A3 (en) * 2018-12-12 2020-08-06 주식회사 포스코 Coke dry quenching method in cdq equipment

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