RU2710084C1 - Melting unit with side submersible combustion of pulverized coal and oxygen enriched air - Google Patents

Melting unit with side submersible combustion of pulverized coal and oxygen enriched air Download PDF

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Publication number
RU2710084C1
RU2710084C1 RU2018143336A RU2018143336A RU2710084C1 RU 2710084 C1 RU2710084 C1 RU 2710084C1 RU 2018143336 A RU2018143336 A RU 2018143336A RU 2018143336 A RU2018143336 A RU 2018143336A RU 2710084 C1 RU2710084 C1 RU 2710084C1
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RU
Russia
Prior art keywords
pulverized coal
injection
melting
oxygen
lance
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Application number
RU2018143336A
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Russian (ru)
Inventor
Сюеганг ЧЖЕН
Мин ЛИ
Чжуаньгу ВУ
Кефей САО
Цин ЧЖАН
Йи ЛИН
Шуанцзе ФЕНГ
Original Assignee
Чайна Энфи Инжиниринг Корпорейшн
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Priority to CN201620439306.1U priority Critical patent/CN205843366U/en
Priority to CN201610321896.2A priority patent/CN105823334B/en
Priority to CN201610321896.2 priority
Priority to CN201620439306.1 priority
Application filed by Чайна Энфи Инжиниринг Корпорейшн filed Critical Чайна Энфи Инжиниринг Корпорейшн
Priority to PCT/CN2017/078653 priority patent/WO2017197985A1/en
Application granted granted Critical
Publication of RU2710084C1 publication Critical patent/RU2710084C1/en

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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00General methods of reducing to metals
    • C22B5/02Dry methods smelting of sulfides or formation of mattes
    • C22B5/10Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00Shaft or like vertical or substantially vertical furnaces
    • F27B1/10Details, accessories, or equipment peculiar to furnaces of these types
    • F27B1/16Arrangements of tuyeres
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00Charging; Discharging; Manipulation of charge
    • F27D3/16Introducing a fluid jet or current into the charge

Abstract

FIELD: manufacturing technology.SUBSTANCE: invention relates to melting unit with side submersible combustion of pulverized coal and oxygen enriched air, which provides high efficiency and wide applicability at low operating costs. Proposed melting device comprises melting furnace, pipe for supply of pulverized coal, tube for supply of air enriched with oxygen and communicated with air source, and units for injection of pulverized coal located on two opposite side walls of smelting furnace at distance between them. Each unit for injection of pulverized coal is made in the form of a pair of tuyeres adjacent to each other for pulverized coal and oxygen tuyere. Each tuyere for pulverized coal is connected to a pipe for supply of pulverized coal, each oxygen tuyere is connected to a pipe for supply of oxygen enriched with oxygen, and each specified unit at least partially passes into smelting furnace.EFFECT: melting apparatus with side submerged combustion of pulverized coal and oxygen enriched air is proposed.11 cl, 4 dwg

Description

FIELD OF THE INVENTION
The present invention relates to the field of metallurgy. More specifically, it includes a lateral-immersion melting apparatus of a combustion chamber for atomizing oxygen-enriched air and pulverized coal.
BACKGROUND OF THE INVENTION
The lateral immersion of the combustion chamber (BPS) melting process consists in injecting oxygen-enriched air and gaseous fuel into the molten metal bath through nozzles or tuyeres made on both sides of the melting furnace, and the injected gas mixes the contents of the molten metal bath to accelerate heat and mass transfer and chemical reaction in a molten metal bath. The melting process with BPCS is widely used in the processing of non-ferrous metals (such as lead smelting, zinc slag smelting, copper smelting, etc.) and solid waste treatment.
If a gas melting apparatus with side immersion of the combustion chamber uses natural gas, coke oven gas, and regenerative gas as fuel in the existing prior art, fuel gas cannot be used economically in regions experiencing fuel gas shortages, which limits the applicability of the technology using lateral immersion of the combustion chamber.
If in a current melting apparatus with lateral immersion of the combustion chamber, pulverized coal is used as fuel, then pulverized coal and air are mixed inside the lance or nozzle. Therefore, for safety reasons, the concentration of oxygen in the air cannot be too high, which leads to the fact that the efficiency of the hearth area of the thermal furnace and thermal efficiency cannot be adapted to the needs of the modern development of non-ferrous metallurgy, and they cannot achieve large-scale industrial production .
SUMMARY OF THE INVENTION
The present invention is directed to solving at least one of the technical problems of the existing prior art to a certain extent. Accordingly, the present invention provides a side immersion melting apparatus for spraying oxygen enriched air and pulverized coal. In a smelting apparatus with side immersion of the combustion chamber, pulverized coal is used as fuel and, therefore, its advantage lies in its high productivity, low operating costs and wide applicability.
In order to achieve the above objectives, embodiments of the present invention provide a side immersion melting apparatus for spraying oxygen-enriched air and pulverized coal. A smelting apparatus with lateral immersion of the combustion chamber includes: a smelting furnace, pulverized coal feed pipe configured to supply pulverized coal, an air supply pipe configured to supply oxygen enriched air and communicating with an air source, and a group of assemblies for coal injection, spaced at two opposite side walls of the smelter, each pulverized coal injection unit comprises a pulverized coal lance and an oxygen lance which are approximately Poke towards each other and are arranged in a pair, each lance for pulverized coal communicates with the feed pipe of pulverized coal, and the oxygen lance communicates with the pipe of the air supply, and the node injection of pulverized coal, at least partially passes into melting furnace.
In a side-immersion melting apparatus of the combustion chamber, in embodiments of the present invention, pulverized coal can be used as fuel and, therefore, its advantage lies in its high productivity, low operating costs and wide applicability.
In addition, a side immersion melting apparatus based on the aforementioned embodiments of the present invention may also have the following additional technical features.
According to one embodiment of the present invention, the pulverized coal lance of one of the two mutually opposed assemblies for coal injection is the opposite of the pulverized coal lance of the other of the two mutually opposed assemblies for coal injection, and the oxygen lance of one of the two mutually opposed devices for coal injection assembly - opposite the oxygen lance of the other of the two mutually opposing devices for coal injection.
According to one embodiment of the present invention, the pulverized coal lance of one of the two mutually opposing assemblies for coal injection is the opposite of the oxygen lance of the other of the two mutually opposed assemblies for coal injection, and the oxygen lance of one of the two mutually opposed assemblies assembly for coal injection - opposite to the lance for pulverized coal of the other of the two mutually opposite devices in the collection for coal injection.
In accordance with one embodiment of the present invention, the lengths of the respective sections of the pulverized coal tuyeres passing into the smelter are the same, and the length of each section is 50-200 mm.
In accordance with one embodiment of the present invention, the lengths of the respective sections of the group of oxygen tuyeres passing into the smelting furnace are the same, and the length of each section is 50-200 mm.
According to one embodiment of the present invention, the portion of each pulverized coal tuyere that passes into the smelter and the portion of each oxygen tuyere that passes into the smelter are equal in length.
According to one embodiment of the present invention, the distance between the pulverized coal lance and the oxygen lance is the same.
In accordance with one embodiment of the present invention, each pulverized coal lance and each oxygen lance are located at the same height in the smelter.
In accordance with one embodiment of the present invention, the side-immersion melting apparatus of the combustion chamber further includes a pulverized coal distributor, and a pulverized coal tuyere that communicates with the pulverized coal feed pipe through the pulverized coal distributor.
According to one embodiment of the present invention, the pulverized coal lance comprises: an internal injection pipe in which a pulverized coal inlet is provided, a pulverized coal injection port and a pulverized coal purification port; an external injection pipe mounted above the internal injection pipe, which defines a cooling chamber together with an internal injection pipe, wherein an inlet for cooling gas and a port for injection of cooling gas are made in the external injection pipe, and they both communicate with the cooling chamber; a sealing element located in the pipe of internal injection, which is arranged to move between the closed position where the port for cleaning pulverized coal is blocked, and the open position where the port for cleaning pulverized coal is open; and wear-resistant lining made in the inner peripheral surface of the pipe of internal injection.
In accordance with one embodiment of the present invention, an oxygen lance includes: an internal injection pipe in which an air inlet is provided, an air injection port and an impurity purification port; an external injection pipe mounted above the internal injection pipe, which defines a cooling chamber together with an internal injection pipe, wherein an inlet for cooling gas and a port for injecting cooling gas are made in the external injection pipe, and both of them communicate with the cooling chamber; and a sealing element located in the pipe of internal injection, which is arranged to move between a closed position in which the port for cleaning impurities is blocked, and an open position in which the port for cleaning impurities is open.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 shows a schematic illustration of a side-immersion melting apparatus for spraying oxygen-enriched air and pulverized coal based on a particular embodiment of the present invention.
Figure 2 shows a schematic illustration of a side-immersion melting apparatus for spraying oxygen-enriched air and pulverized coal based on another specific embodiment of the present invention.
Figure 3 shows a schematic illustration of a side-immersion melting apparatus for spraying oxygen-enriched air and pulverized coal based on yet another specific embodiment of the present invention.
Figure 4 shows a schematic representation of a side-immersion melting apparatus for spraying oxygen-enriched air and pulverized coal based on yet another specific embodiment of the present invention.
Positional designations:
melting apparatus with lateral immersion of the combustion chamber 1 for spraying oxygen-enriched air and pulverized coal, a melting furnace 100, pulverized coal feed pipe 200, pulverized coal distributor 210, air supply pipe 300, pulverized coal injection unit 400, pulverized coal tuyere 410, pipe internal injection 411, inlet for pulverized coal 4111, port for injection of pulverized coal 4112, port for cleaning pulverized coal 4113, pipe for external injection 412, cooling chamber 4121, inlet for cooling gas 41 22, port for injection of cooling gas 4123, sealing element 413, wear-resistant lining 414, oxygen lance 420, air inlet 4211, port for injection of air 4212, port for cleaning impurities 4213.
DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION
Embodiments of the present invention will be described in detail below, and examples of embodiments are shown in the accompanying drawings. Identical or similar elements and elements having the same or similar functions are denoted by like reference numerals throughout the description. The embodiments of the present invention described herein with reference to the drawings are illustrative and are used for a general understanding of the present invention. Embodiments of the present invention should not be construed as limiting the present invention.
A side immersion melting apparatus of the combustion chamber 1 for atomizing oxygen enriched air and pulverized coal based on a specific embodiment of the present invention will be described below with reference to the drawings.
As shown in Figures 1-4, a side immersion melting apparatus 1 of the combustion chamber based on embodiments of the present invention includes a melting furnace 100, pulverized coal feed pipe 200, air supply pipe 300, and pulverized coal injection unit 400.
Pulverized coal feed pipe 200 is used to supply pulverized coal. The air supply pipe 300 is used to supply oxygen-enriched air, and it communicates with the air source. A group of assemblies for coal injection 400 are spaced at two opposite side walls of the melting furnace 100. A portion of each assembly for injecting coal 400 passes into the melting furnace 100. Each pulverized coal injection unit 400 includes a pulverized coal tuyere 410 and an oxygen lance 420, which are adjacent to each other and arranged in a pair. Each pulverized coal lance 410 communicates with a pulverized coal feed pipe 200, and each oxygen tuyere 420 communicates with an air supply pipe 300. Each pulverized coal injection unit 400 at least partially passes into a melting furnace 100. In this document, it should be understood that the phrase “adjacent to each other and arranged in a pair” means that each lance for pulverized coal 410 is adjacent to one oxygen lance 420, paired with it, and not with two lances for pulverized coal 410, which are adjacent to two ki lorodnymi tuyeres 420.
Thanks to the group of assemblies for injecting coal 400, a side-immersion melting apparatus of the combustion chamber 1, based on embodiments of the present invention, can use the group of assemblies for injecting coal 400 to inject pulverized coal and air into the melting furnace 100. thereby providing a uniform supply of pulverized coal and air to the smelting furnace 100. In addition, since the pulverized coal injection unit 400 includes a pulverized coal lance 410 and an oxygen lance 420 located at every hour, each lance for pulverized coal 410 communicates with a pulverized coal feed pipe 200, and each oxygen lance 420 communicates with an air feed pipe 300, the pulverized coal lance 410 and oxygen lance 420 can be used to spray pulverized coal and air, respectively. This allows pulverized coal and air to mix in the melting furnace 100 in order to prevent pulverized coal and air from mixing in the coal injection assembly 400. Therefore, the oxygen content in the air supplied by the oxygen lance 420 can be increased, and the flow area efficiency thermal furnace and thermal efficiency of the melting apparatus with lateral immersion of the combustion chamber 1 can be improved, which, thus, increases the production efficiency of the melting apparatus with lateral immersion of the chambers combustion 1 and contributes to the fact that the melting apparatus with lateral immersion of the combustion chamber 1 can provide large-scale industrial production using pulverized coal as fuel.
In addition, since the melting apparatus with side immersion of the combustion chamber 1 can use pulverized coal as fuel, the melting apparatus with lateral immersion of the combustion chamber 1 can not only help reduce operating costs, but it can also be used in regions where there is little gas fuel, which, thus, extends the applicability of the melting apparatus with lateral immersion of the combustion chamber 1.
In addition, due to the fact that there is a group of assemblies for injection of coal 400, when part of the tuyeres for pulverized coal 410 wear out, the remaining tuyeres for pulverized coal 410 can be used to continue the supply of pulverized coal, and worn tuyeres for pulverized coal 410 can be reused after centralized maintenance on time. Thus, it is possible to reduce the exposure time after turning off the furnace, to avoid frequent interruption of the normal operation of the melting apparatus 1 and to further increase the production efficiency of the melting apparatus 1.
In addition, since pulverized coal and air are supplied through the pulverized coal tuyere 410 and the oxygen tuyere 420, respectively, if the pulverized coal tuyere 410 becomes clogged or damaged, the air supply to the oxygen tuyere 420 will not be affected. Compared to the tuyere with multi-level channels used in the prior art, it becomes possible to supply oxygen-enriched air during the cleaning of the clogged dust tuyere for pulverized coal 410 and to increase the safety and reliability of the melting apparatus 1. In addition, if the same amount of pulverized coal is injected coal, and the injection pressure is the same, since pulverized coal and air are supplied through the pulverized coal lance 410 and the oxygen lance 420, respectively, of pulverized coal and the amount of piping 410 for supplying the pulverized coal can be reduced, which may also help to prevent clogging of the lance pipe and pulverized coal pulverized coal 410, on the one hand, and reducing the cost of the melter 1, on the other hand.
Thus, in a side-immersion melting apparatus of the combustion chamber 1, based on embodiments of the present invention, pulverized coal can be used as fuel and, therefore, its advantage is high productivity, low operating costs and wide applicability.
A side immersion melting apparatus of the combustion chamber 1, in accordance with particular embodiments of the present invention, will be described below with reference to the drawings.
In some specific embodiments of the present invention, as shown in FIGS. 1-4, a side immersion melting apparatus 1 of the combustion chamber 1, in accordance with embodiments of the present invention, includes a melting furnace 100, pulverized coal feed pipe 200, air supply pipe 300, and an assembly pulverized coal injection 400. An air source may supply oxygen enriched air to the air supply pipe 300.
Figure 1 shows a side immersion melting apparatus of combustion chamber 1, in accordance with a particular embodiment of the present invention. As shown in Figure 1, the lance for pulverized coal 410 in one of two mutually opposed assemblies for injecting coal 400 is the opposite of the lance for pulverized coal 410 in the other of two mutually opposed assemblies for injecting coal 400, and the oxygen lance is 420 in one of the two mutually opposing assemblies for injecting coal 400 is opposite the oxygen lance 420 in the other of the two mutually opposing assemblies for injecting coal 400. Thus, pulverized coal and air injected into the smelter furnace 100 can be evenly distributed so that the pulverized coal can completely burn.
Figure 2 shows a side immersion melting apparatus of combustion chamber 1, in accordance with another specific embodiment of the present invention. As shown in Figure 2, the lance for pulverized coal 410 in one of the two mutually opposing assemblies for injecting coal 400 is the opposite of the oxygen lance 420 in the other of the two mutually opposing assemblies for injecting 400 coal, and the oxygen lance 420 in one of two mutually opposed assemblies for injection of coal 400 is opposite the lance for pulverized coal 410 in the other of two mutually opposed assemblies for injection of coal 400. Similarly, pulverized coal and air injected into the tanning furnace 100 can be evenly distributed so that the pulverized coal can completely burn.
If necessary, as shown in Figures 1 and 2, the lengths of the respective parts of the tuyere group for pulverized coal 410 passing into the melting furnace 100 are the same and are 50-200 mm Thus, pulverized coal can be burned more fully, and the melting apparatus 1 can achieve the optimal combustion effect in order to increase the production efficiency of the melting apparatus with lateral immersion of the combustion chamber 1.
In addition, as shown in Figures 1 and 2, the lengths of the respective parts of the group of oxygen tuyeres 420 passing into the melting furnace 100 are the same, and each is 50-200 mm. Thus, pulverized coal can be burned more fully, and the melting apparatus 1 can achieve the optimal combustion effect in order to increase the production efficiency of the melting apparatus with lateral immersion of the combustion chamber 1.
In a preferred embodiment of the present invention, as shown in Figures 1 and 2, the portion of each tuyere for pulverized coal 410, which passes into the melting furnace 100, and the portion of each oxygen tuyere 420, which passes to the melting furnace 100, are equal in length. Thus, the pulverized coal injected into the smelting furnace 100 by the pulverized coal tuyere 410 can be sufficiently mixed with the air injected from the oxygen tuyere 420 adjacent to the pulverized coal tuyere 410 so that the pulverized coal can burn enough degrees.
In particular, as shown in Figures 1 and 2, the distance between the pulverized coal lance 410 and the oxygen lance 420 in the group of devices for collecting coal injection 400 is the same. Thus, combustion in the melting furnace 1 becomes more sufficient, and the temperature in the melting furnace 1 becomes more uniform.
In particular, each lance for pulverized coal 410 and each oxygen lance 420 are located at the same height on the melting furnace 100, which can contribute to regulating the liquid level in the molten metal bath of the apparatus with lateral immersion of the combustion chamber 1, and this can be convenient for completely mixing the bath molten metal injected air.
As shown in Figures 1 and 2, the side immersion apparatus of combustion chamber 1 further includes a pulverized coal distributor 210, and the pulverized coal tuyeres 410 communicate with the pulverized coal feed pipe 200 through the pulverized coal distributor 210. Thus, pulverized coal supplied to each of the tuyeres for pulverized coal 410, can be supplied evenly in order to ensure uniform combustion in the melting furnace 100.
Figures 3 and 4 show a side immersion melting apparatus of combustion chamber 1, in accordance with some specific embodiments of the present invention. As shown in Figure 3, the pulverized coal lance 410 includes an internal injection pipe 411, an external injection pipe 412, a sealing member 413, and a wear resistant lining 414. An inlet for pulverized coal 4111, a port for injecting pulverized coal 4112, and a port for injecting pulverized coal are provided in the inner injection pipe 411. port for cleaning pulverized coal 4113. An external injection pipe 412 is installed above the internal injection pipe 411, and it defines a cooling chamber 4121 together with the internal injection pipe 411. An inlet port is made in the external injection pipe 412 a cooling gas 4122 and a cooling gas injection port 4123, both of which communicate with the cooling chamber 4121. The sealing element 413 is located in the inner injection pipe 411 and is movable between a closed position in which the dust coal cleaning port 4113 blocked, and in an open position in which the pulverized coal port 4113 is open. A wear resistant lining 414 is formed on the inner peripheral surface of the inner injection pipe 411. Therefore, when the pulverized coal lance 410 is operating normally, the pulverized coal cleaning port 4113 is blocked by the sealing element 413, as a result of which the pulverized coal cannot pass through the pulverized coal cleaning port 4113; and when the inner injection pipe 411 needs to be cleaned, the sealing element 413 can be moved to the open position to clean the inner injection pipe 411 through the pulverized coal cleaning port 4113 to prevent clogging of the inner injection pipe 411 with pulverized coal, thus providing a reliable feed pulverized coal.
In the state of the art, during the replacement of the pulverized coal tuyere, the melter must temporarily stop working, and the liquid level in the molten metal bath of the melting apparatus drops below the height of the pulverized coal tuyere, which seriously affects the speed of operation. However, as regards the melting apparatus with lateral immersion of the combustion chamber 1, the pulverized coal lance 410 is cleaned through the pulverized coal cleaning port 4113 without the need to lower the liquid level in the melting apparatus 1 or stopping the operation of the melting apparatus 1, as a result of which the production efficiency of the melting apparatus is ensured apparatus 1, and large-scale industrial production using pulverized coal as a raw material is being implemented.
In addition, due to the fact that there is a cooling chamber 4121, it is possible to use cooling gas to cool the external injection pipe 412 and the internal injection pipe 411 so as to prevent too high a temperature of the tuyere portion for pulverized coal 410 that passes into the melting furnace 100, as a result, damage to the tuyeres for pulverized coal 410 due to excessive temperature is prevented, and the life of the tuyeres for pulverized coal 410 is extended. Due to the wear-resistant lining 414, it is possible to prevent the wear of the inner injection pipe 411, to reduce the wear of the inner injection pipe 411 caused by pulverized coal eroding the inner wall when pulverized coal is supplied by the tuyere for pulverized coal 410, and the service life of the tuyere for pulverized coal 410 extends.
In particular, when part of the pulverized coal tuyeres 410 is clogged, the non-clogged pulverized coal tuyeres 410 can be used to continue to maintain the normal operation of the melting apparatus 1, and the clogged pulverized coal tuyeres 410 may return to work after some time after cleaning through the port for pulverized coal purification 4113. During purification, pulverized coal tuyere 410 can be switched from pulverized coal injection to nitrogen injection by means of pulverized coal distributor 210 so that Clean up the operator’s cleaning and improve the operator’s working environment.
If necessary, the wear resistant linings 414 may be ceramic linings, and the cooling gas may be nitrogen.
In particular, as shown in Figure 4, the oxygen lance 420 includes an internal injection pipe 411, an external injection pipe 412, and a sealing member 413. An air inlet 4211, an air injection port 4212, and an impurity purification port are provided in the internal injection pipe 411. 4213. The external injection pipe 412 is mounted above the internal injection pipe 411, and it defines a cooling chamber 4121 together with the internal injection pipe 411. In the external injection pipe 412, an inlet for cooling gas 4122 and an injection port are provided and cooling gas 4123, and they both communicate with the cooling chamber 4121. The sealing element 413 is located in the pipe of internal injection 411, and it is arranged to move between the closed position, where the port for cleaning impurities 4213 is blocked, and the open position, where the port for purification of impurities 4213 open. Therefore, when the oxygen lance 420 is operating normally, the port for cleaning impurities 4213 is blocked by the sealing element 413, as a result of which air cannot pass through the port for cleaning impurities 4213; and when the inner injection pipe 411 needs to be cleaned, the sealing element 413 can be moved to the open position to clean the inner injection pipe 411 through the impurity cleaning port 4213 to prevent clogging of the inner injection pipe 411 with impurities, thereby ensuring reliable air supply . In addition, due to the fact that there is a cooling chamber 4121, it is possible to use cooling gas to cool the external injection pipe 412 and the internal injection pipe 411 so as to prevent the temperature of the oxygen lance 420 that passes into the melting furnace 100 to be too high. thereby preventing damage to the oxygen lance 420 due to excessive temperature, and the life of the oxygen lance 420 is extended.
In the present description, it should be understood that terms such as "central", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , “Left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “internal”, “external”, “clockwise”, “counterclockwise”, “axial”, “ radial "and" peripheral "should be construed as referring to the orientation, as described below or as shown in the drawings. These relative terms are intended for convenience and ease of description, and there is no need for the present invention to have a specific orientation, or to be considered or exploited in a specific orientation. Thus, these terms should not be construed as limiting the present invention.
In addition, terms such as “first” and “second” are used herein for the purpose of description, and they do not indicate or imply relative importance or significance, or do not imply the number of indicated technical features. Thus, a feature defined by the terms “first” and “second” may contain at least one of this feature. In the description of the present invention, the term "group" means at least two, unless otherwise indicated.
In the present invention, unless otherwise indicated or otherwise limited, the terms “mounted”, “connected”, “connected”, “fixed” and the like are used in a broad sense and may mean, for example, fixed connections, removable connections or internal connections; they may also indicate mechanical or electrical connections; they may also indicate direct compounds or indirect compounds by means of intermediate structures; they can also indicate the internal relationships of two elements that may be understood by those skilled in the art in accordance with specific situations.
In the present invention, unless otherwise indicated or otherwise limited, a structure in which the first feature is in the “on” or “below” position of the second feature may include an embodiment of the present invention in which the first feature is in the forward position contact with the second feature, and it may also include an embodiment of the present invention, in which the first feature and the second feature are not in direct contact with each other, but are contacted by an additional prize naka formed between them. In addition, the structure in which the first feature is in the “on”, “above” or “above” position of the second feature may include an embodiment of the present invention in which the first feature is in the directly, indirectly “on”, “above” position, or “On top” of the second attribute, or it simply means that the first attribute is at a height that is higher than the height of the second attribute; however, the structure in which the first feature is in the position “below”, “below” or “below” of the second feature may include an embodiment of the present invention in which the first feature is in the position directly or indirectly “below”, “under” either “below” the second attribute, or it simply means that the first attribute is at a height that is lower than the height of the second attribute.
A reference throughout this description to an “embodiment of the present invention”, “some embodiments of the present invention”, “example”, “specific example” or “some examples” means that a particular feature, structure, material or characteristic described in connection with an embodiment of the present invention, or an example, is included in at least one embodiment or embodiment of the present invention. Thus, the appearance of these phrases in various places of this description does not necessarily refer to the same embodiment or embodiment of the present invention. In addition, specific features, structures, materials or characteristics may be combined in any suitable manner in at least one embodiment or embodiment of the present invention. In addition, those skilled in the art can combine or combine various embodiments or embodiments of the present invention, as well as features in various embodiments or embodiments of the present invention described herein, without any contradictions.
Although embodiments of the present invention have been demonstrated and described, those skilled in the art will understand that the above embodiments of the present invention are explanatory and cannot be construed as limiting the present invention, and changes, alternatives, modifications may be made to embodiments of the present invention. and other options are proposed without departing from the scope of the present invention.

Claims (21)

1. A smelter with side submersible combustion of pulverized coal and oxygen-enriched air, containing
melting furnace
a pulverized coal feed pipe, an oxygen enriched air supply pipe and in communication with an air source, and
pulverized coal injection units located on two opposite side walls of the melting furnace at a distance between them, characterized in that each pulverized coal injection unit is made in the form of a pair of adjoining tuyeres for pulverized coal and oxygen tuyere, each tuyere for pulverized coal is connected to the pulverized coal feed pipe, each oxygen lance is connected to the oxygen-enriched air supply pipe, and each of said assemblies at least partially passes into the melting furnace.
2. The melting apparatus according to claim 1, characterized in that the lance for pulverized coal in one of two mutually opposite nodes for injection of pulverized coal is located opposite the lance for pulverized coal in the other of two mutually opposite nodes for injection of pulverized coal, and the oxygen lance in one of two mutually opposite nodes for injection of pulverized coal is located opposite the oxygen tuyere in the other of two mutually opposite nodes for injection of pulverized coal.
3. The melting apparatus according to claim 1, characterized in that the lance for pulverized coal in one of two mutually opposite nodes for injection of pulverized coal is located opposite the oxygen lance in the other of two mutually opposite nodes for injection of pulverized coal, and the oxygen lance in one of two mutually opposing nodes for pulverized coal injection is located opposite the tuyere for pulverized coal in the other of the two mutually opposite nodes for injection of pulverized coal.
4. The melting apparatus according to claim 1, characterized in that the lengths of the respective sections of the tuyeres for pulverized coal passing into the melting furnace are the same and the length of each section is 50-200 mm.
5. The melting apparatus according to claim 1, characterized in that the lengths of the respective sections of oxygen tuyeres passing into the melting furnace are the same and the length of each section is 50-200 mm.
6. The melting apparatus according to claim 1, characterized in that the portion of each tuyere for pulverized coal that passes into the melting furnace and the portion of each oxygen tuyere that passes into the melting furnace are the same in length.
7. The melting apparatus according to claim 1, characterized in that the distance between the pulverized coal lance and the oxygen lance in the pulverized coal injection units is the same.
8. The melting apparatus according to claim 1, characterized in that each lance for pulverized coal and each oxygen lance are located at the same height in the melting furnace.
9. The melting apparatus according to claim 1, characterized in that it further comprises a pulverized coal distributor, while the pulverized coal tuyeres are in communication with the pulverized coal feed pipe by means of the pulverized coal distributor.
10. The melting apparatus according to any one of paragraphs. 1-9, characterized in that the lance for pulverized coal contains
an internal injection pipe in which an inlet for pulverized coal is made, a port for injecting pulverized coal and a port for cleaning pulverized coal,
an external injection pipe installed with the possibility of forming a cooling chamber together with an internal injection pipe, while in the external injection pipe there is an inlet for cooling gas and a port for injection of cooling gas in communication with the cooling chamber,
a sealing member located in the inner injection pipe and configured to move between a closed position in which the dust coal cleaning port is blocked and an open position in which the dust coal cleaning port is open, and
wear-resistant lining made in the inner peripheral surface of the pipe of internal injection.
11. The melting apparatus according to any one of paragraphs. 1-9, characterized in that the oxygen lance contains
an internal injection pipe in which an air inlet is provided, an air injection port and an impurity purification port,
an external injection pipe installed with the possibility of forming a cooling chamber together with an internal injection pipe, while in the external injection pipe there is an inlet for cooling gas and a port for injection of cooling gas in communication with the cooling chamber, and
a sealing element located in the pipe of internal injection and configured to move between a closed position in which the port for cleaning impurities is blocked and an open position in which the port for cleaning impurities is open.
RU2018143336A 2016-05-16 2017-03-29 Melting unit with side submersible combustion of pulverized coal and oxygen enriched air RU2710084C1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
CN201620439306.1U CN205843366U (en) 2016-05-16 2016-05-16 Winding-up oxygen-enriched air and the side-blown submerged combustion bath smelting device of fine coal
CN201610321896.2A CN105823334B (en) 2016-05-16 2016-05-16 It is blown the side-blown submerged combustion bath smelting device of oxygen-enriched air and fine coal
CN201610321896.2 2016-05-16
CN201620439306.1 2016-05-16
PCT/CN2017/078653 WO2017197985A1 (en) 2016-05-16 2017-03-29 Side-submerged combustion smelting apparatus for spraying oxygen-enriched air and pulverized coal

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WO2017197985A1 (en) 2017-11-23
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EP3460371A4 (en) 2019-10-23
AU2017266791B2 (en) 2020-07-23

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