WO2017197986A1

WO2017197986A1 - Spray gun for side-submerged combustion smelting apparatus

Info

Publication number: WO2017197986A1
Application number: PCT/CN2017/078654
Authority: WO
Inventors: 陈学刚; 黎敏; 邬传谷; 曹珂菲; 张清; 林屹; 冯双杰
Original assignee: 中国恩菲工程技术有限公司
Priority date: 2016-05-16
Filing date: 2017-03-29
Publication date: 2017-11-23

Abstract

A spray gun (1) for a side-submerged combustion smelting apparatus. The spray gun (1) comprises: an inner spray tube (100) provided with a medium inlet (130), a medium spray port (140), and a medium clean port (150); an outer spray tube (200) defining a cooling cavity (210) together with the inner spray tube (100) and provided with a cooling air inlet (220) and a cooling air spray port (230) that are in communication with the cooling cavity (210); and a sealing member (300) capable of moving between a close position for sealing the medium clean port (150) and an open position for opening the medium clean port (150).

Description

Spray gun for side blowing submerged combustion bath melting unit

Technical field

The present invention relates to the field of metallurgical technology, and in particular to a spray gun for a side-blown submerged combustion bath smelting apparatus.

Background technique

The side-blown immersion combustion pool smelting process (SSC process) is to inject oxygen-enriched air and gaseous fuel into the molten pool through the tuyere or spray gun on both sides of the furnace body, and the injected gas agitates the molten pool to accelerate heat and mass transfer in the molten pool. And chemical reactions, widely used in the field of non-ferrous metals and solid waste treatment such as lead smelting, zinc slag smelting, copper smelting.

In the side-blown immersion smelting device of the related art, since the pulverized coal is extremely easy to block the spray gun, only natural gas, coke oven gas, and gas generation can be used as fuel, and in the gas-deficient region, gas can not be economically used as a side blow immersion smelting. The fuel of the device limits the applicability of the side-blown immersion combustion technology.

Summary of the invention

The present invention aims to solve at least one of the above technical problems in the prior art to some extent. To this end, the present invention provides a spray gun for a side-blown submerged combustion bath smelting apparatus, which is capable of injecting pulverized coal into a side-blown immersion molten pool smelting apparatus, thereby improving the production efficiency of the smelting apparatus and having a low clogging. Long life and other advantages.

In order to achieve the above object, a spray gun for a side blow submerged combustion molten pool smelting apparatus is provided according to an embodiment of the present invention, and the spray gun for a side blow submerged combustion molten pool melting apparatus includes: an inner nozzle, the inner The nozzle has a medium inlet, a medium nozzle and a medium cleaning port; an outer nozzle is sleeved on the inner nozzle and defines a cooling chamber together with the inner nozzle, the outer nozzle a cooling gas inlet and a cooling gas nozzle communicating with the cooling chamber; a sealing member disposed on the inner nozzle and closing the medium cleaning port and opening the medium The cleaning port can be moved between open positions.

The spray gun for the side-blown immersion melting pool smelting apparatus according to the embodiment of the present invention can spray pulverized coal or oxygen-enriched air, improve the production efficiency of the smelting apparatus, and has the advantages of being less clogging and having a long service life.

Further, the spray gun for the side blown immersion molten pool melting apparatus according to the above embodiment of the present invention may further have the following additional technical features:

According to an embodiment of the present invention, the outer nozzle is spaced apart from the inner nozzle to define the inner circumferential surface of the outer nozzle and at least a portion of an outer circumferential surface of the inner nozzle a cooling chamber, the medium nozzle and the medium cleaning port are respectively located at two ends of the inner nozzle, and the medium inlet is located on a peripheral wall of the inner nozzle.

According to an embodiment of the present invention, one end of the outer nozzle is provided to block the one end of the outer nozzle An outer nozzle flange, wherein the outer nozzle is connected to the inner nozzle through the outer nozzle flange, the cooling gas inlet is located on a peripheral wall of the outer nozzle, and the cooling gas nozzle is located at The other end of the outer nozzle.

According to an embodiment of the present invention, the inner nozzle includes: a tubular body formed at one end of the tubular body; a three-way valve body having the three-way valve respectively located Two ends of the body and three valve ports on the peripheral wall of the three-way valve body, wherein a valve port at one end of the three-way valve body communicates with the other end of the pipe body, and the three-way valve is located a valve port at the other end of the body constitutes the medium cleaning port, a valve port on the peripheral wall of the three-way valve body constitutes a medium inlet, the sealing member is disposed in the three-way valve body, and is sealed a movable position between a closed position of the medium cleaning opening and an open position in which the medium cleaning opening is opened, the three-way valve body being provided with a seal sliding groove, the sealing member being between the open position and the closed position The seal sliding groove is movably fitted in the seal sliding groove, and the seal sliding groove extends obliquely outward from the medium cleaning opening and away from the medium cleaning opening.

According to an embodiment of the invention, the three-way valve body is flanged to the tubular body by an inner nozzle.

DRAWINGS

1 is a cross-sectional view of a spray gun for a side blow submerged combustion bath smelting apparatus in accordance with an embodiment of the present invention.

2 is a cross-sectional view of a spray gun for a side blow submerged combustion bath smelting apparatus in accordance with an embodiment of the present invention.

LIST OF REFERENCE NUMERALS: spray gun 1, inner nozzle 100, pipe body 110, outer nozzle flange 111, three-way valve body 120, inner nozzle flange 121, plug 122 for side-blown immersion melting pool melting device The medium inlet 130, the medium nozzle 140, the medium cleaning port 150, the outer nozzle 200, the cooling chamber 210, the cooling gas inlet 220, the cooling air nozzle 230, the sealing member 300, the seal sliding groove 310, and the wear resistant liner 400.

detailed description

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A spray gun 1 for a side blow submerged combustion bath melting apparatus according to an embodiment of the present invention will now be described with reference to the accompanying drawings.

As shown in FIGS. 1 and 2, a spray gun 1 for a side blow submerged combustion bath melting apparatus according to an embodiment of the present invention includes an inner nozzle 100, an outer nozzle 200, and a seal 300.

The inner nozzle 100 has a medium inlet 130, a medium spout 140 and a medium cleaning port 150. The outer nozzle 200 is sleeved on the inner nozzle 100 and defines a cooling chamber 210 together with the inner nozzle 100. The outer nozzle 200 has a cooling gas inlet 220 and a cooling air nozzle 230 communicating with the cooling chamber 210. The seal 300 is disposed on the inner spout 100 and is movable between a closed position in which the medium cleaning port 150 is closed and an open position in which the medium cleaning port 150 is opened. It should be understood here that the medium may refer to a fuel for combustion (for example, pulverized coal), and may also refer to a raw material for combustion support (for example). Such as oxygen-rich air).

According to an embodiment of the present invention, a spray gun 1 for a side blow immersion molten pool smelting apparatus is provided with a medium inlet 130, a medium discharge port 140 and a medium cleaning port 150 on the inner nozzle 100, which can be used for immersion in the side. The medium reacted in the combustion pool smelting device is introduced into the inner nozzle 100 through the medium inlet 130 and then ejected through the medium nozzle 140 to deliver the combustion medium to the side immersion immersion melting pool smelting device. By providing the medium cleaning port 150, the inner nozzle 100 can be cleaned through the medium cleaning port 150 to prevent the medium or the impurities from clogging the inner nozzle 100, thereby ensuring the reliability of the transportation medium. Thus, when the pulverized coal is conveyed by the lance 1, if the pulverized coal or impurities block the inner nozzle 100, the inner nozzle 100 can be cleaned through the medium cleaning port 150 without replacing the lance 1. In the background art, when the spray gun 1 is replaced, the work of the side blow submerged combustion molten pool melting device needs to be temporarily stopped, and the molten pool level of the side blow submerged combustion molten pool melting device is lowered below the height of the spray gun 1 and passed. The inner nozzle 100 is cleaned by the medium cleaning port 150, and the side blow immersion combustion pool melting device does not need to be stopped, which is improved compared with the related art in which the production of the molten pool is required to reduce the depth of the molten pool for the replacement of the spray gun. The operating rate and production capacity of the smelting device ensure the production efficiency of the side blow immersion combustion pool smelting device, and realize large-scale industrial production using pulverized coal as raw material.

Further, coal is a relatively economical energy source due to its relatively abundant coal resources and low prices. The pulverized coal can be sprayed by the spray gun of the side blow immersed in the molten pool smelting device, so that the smelting device can realize large-scale industrial production using pulverized coal as a raw material, thereby greatly reducing the running cost of the smelting device. Improve the competitiveness of enterprises.

Moreover, by providing the sealing member 300, the sealing member 300 can be moved between the closed position of the blocking medium cleaning opening 150 and the open position of the opening medium cleaning opening 150, and the sealing member 300 can be used to seal the medium during the normal operation of the spray gun 1. The cleaning port 150 is cleaned so that the combustion medium cannot pass through the medium cleaning port 150, and the combustion medium can be ejected through the medium nozzle 140 after entering the medium inlet 130, and the sealing member 300 can be moved to the above when the inner nozzle 100 needs to be cleaned. The position is opened to clean the inner nozzle 100 through the media cleaning port 150.

In addition, by providing the outer nozzle 200, the inner nozzle 100 and the outer nozzle 200 can be used together to define the cooling chamber 210, so that the cooling gas can be ejected through the cooling air nozzle 230 through the cooling air inlet 220 and then through the cooling air nozzle 230. The inner nozzle 100 and the outer nozzle 200 are cooled by using a cooling gas. Therefore, when the spray gun 1 is inserted into the furnace body of the combustion smelting apparatus, the temperature of the spray gun 1 is prevented from being excessively high, and the spray gun 1 can be prevented from being damaged due to excessive temperature, thereby prolonging the service life of the spray gun 1.

Therefore, the spray gun 1 for the side-blown immersion molten pool smelting apparatus according to the embodiment of the present invention can spray pulverized coal or oxygen-enriched air, improve the production efficiency of the smelting apparatus, and has the advantages of being less likely to be clogged, having a long service life, and the like.

A spray gun 1 for a side-blown submerged melting pool melting apparatus in accordance with an embodiment of the present invention will now be described with reference to the accompanying drawings.

In some embodiments of the present invention, as shown in FIGS. 1 and 2, a spray gun 1 for a side blow submerged combustion bath smelting apparatus according to an embodiment of the present invention includes an inner nozzle 100, an outer nozzle 200, and a seal. Piece 300.

In a specific embodiment of the present invention, as shown in FIG. 2, the inner peripheral surface of the inner nozzle 100 is provided with a wear-resistant inner liner 400. In particular, the wear resistant liner 400 can be a ceramic liner. This can prevent the inner nozzle 100 from being worn out, and reduce the wear caused by the pulverized coal flushing inner wall to the inner nozzle 100 when the pulverized coal is conveyed by the spray gun 1, and prolong the service life of the spray gun 1.

It should be understood here that the spray gun 1 can be used for conveying pulverized coal or for transporting oxygen-enriched air. When the oxygen-enriched air is delivered by the spray gun 1, the wear-resistant lining 400 can be omitted in the spray gun 1 to save costs.

Of course, the inner nozzle 100 itself can also be made of a wear resistant material. This not only ensures the inner diameter of the inner nozzle 100, but also prevents the inner nozzle 100 from being worn.

Alternatively, the outer nozzle 200 and the inner nozzle 100 may both be high temperature resistant stainless steel pieces.

1 and 2 show a spray gun 1 for a side blow submerged combustion bath smelting apparatus in accordance with a specific example of the present invention. As shown in FIGS. 1 and 2, the medium discharge port 140 and the medium cleaning port 150 are respectively located at both ends of the inner nozzle 100, and the medium inlet 130 is located on the peripheral wall of the inner nozzle 100. This facilitates the removal of the tool into the media cleaning port 150 for cleaning the inner nozzle 100.

Specifically, as shown in FIGS. 1 and 2, the outer nozzle 200 is spaced apart from the inner nozzle 100 to define a cooling cavity 210 between the inner circumferential surface of the outer nozzle 200 and at least a portion of the outer circumferential surface of the inner nozzle 100. . This facilitates the formation of the cooling chamber 210 and facilitates the manufacture of the spray gun 1.

More specifically, as shown in FIGS. 1 and 2, one end of the outer nozzle 200 is provided with an outer nozzle flange 111 for closing the one end of the outer nozzle 200, and the outer nozzle 200 is passed through the outer nozzle. The flange 111 is connected to the inner nozzle 100, the cooling gas inlet 220 is located on the peripheral wall of the outer nozzle 200, and the cooling gas nozzle 230 is located at the other end of the outer nozzle 200. In this way, the cooling gas can pass through the cooling gas inlet 220 into the cooling chamber 210 and be ejected through the cooling air nozzle 230 to fully exert the cooling effect of the cooling gas.

Specifically, the cooling gas may be nitrogen.

1 and 2 show a spray gun 1 for a side blow submerged combustion bath smelting apparatus in accordance with a specific example of the present invention. As shown in FIGS. 1 and 2, the inner nozzle 100 includes a tubular body 110 and a three-way valve body 120. A medium spout 140 is formed at one end of the tubular body 110. The three-way valve body 120 has three valve ports respectively located at both ends of the three-way valve body 120 and the peripheral wall of the three-way valve body 120, wherein the valve port at one end of the three-way valve body 120 and the other of the pipe body 110 The valve port at the other end of the three-way valve body 120 constitutes a medium cleaning port 150. The valve port on the peripheral wall of the three-way valve body 120 constitutes a medium inlet 130, and the sealing member 300 is disposed in the three-way valve body 120. And it can be moved between the closed position of the blocking medium cleaning port 150 and the open position of the opening medium cleaning opening 150. This can facilitate the cleaning and maintenance of the spray gun 1.

Specifically, as shown in FIGS. 1 and 2, a three-way valve body 120 is provided with a seal sliding groove 310, and the sealing member 300 is movably fitted between the open position and the closed position in the seal sliding groove. Within 310. This can facilitate sliding of the seal 300 between the open position and the closed position.

Advantageously, as shown in Figures 1 and 2, the seal sliding slot 310 is outwardly and away from the media cleaning port 150. The direction of the cleaning port 150 extends obliquely. Thus, the seal 300 can be automatically moved to the open position as the tool extends into the media cleaning port 150 to further facilitate cleaning of the spray gun 1.

More specifically, as shown in FIGS. 1 and 2, the seal sliding groove 310 may extend obliquely upward and forward from the medium cleaning port 150 (up and down direction is indicated by an arrow B in FIGS. 1 and 2). In this way, after the cleaning tool is removed, the sealing member 300 can be returned to the closed position by itself to ensure that the spray gun 1 can work normally after cleaning.

More advantageously, the three-way valve body 120 can include a body and a plug 122, and a media cleaning port 150 can be formed on the plug 122, and the plug 122 can be threadedly fitted to the body. The diameter of the seal 300 is smaller than the diameter of the medium cleaning port 150, the rear end of the seal sliding groove 310 is open, and the plug 122 is provided at the rear end of the seal sliding groove 310 to stop the seal 300. Thus, the seal 300 can be placed in the seal sliding groove 310, and the plug 122 can be mounted on the body. This makes it possible to facilitate the mounting of the seal 300.

Specifically, the cleaning tool may be a steel brazing which is adapted to the inner diameter of the medium cleaning port 150. When the cleaning of the spray gun 1 is required due to the pulverized coal, the sealing member 300 may be jacked up by the steel and the steel is utilized. The brazing material is inserted into the interior of the spray gun 1 for dredging. During the cleaning, only the nitrogen gas is blown in the medium inlet 130 to prevent the leakage of the pulverized coal when the pulverized coal passage is unblocked, and the working environment of the worker can be improved.

Alternatively, as shown in FIGS. 1 and 2, the three-way valve body 120 is connected to the tubular body 110 through the inner nozzle flange 121. This not only ensures the strength of the connection between the three-way valve body 120 and the tubular body 110, but also improves the sealing between the tubular body 110 and the three-way valve body 120.

Specifically, when the pulverized coal is conveyed by the lance 1, the injection pressure in the lance 1 is 0.1-0.6 MPa, preferably 0.2-0.3 MPa, and the blowing speed is 100-200 m/s. When the oxygen-enriched air is supplied by the lance 1, the injection pressure in the lance 1 is 0.1-0.6 MPa, preferably 0.2-0.3 MPa, and the blowing speed is 100-200 m/s.

Other configurations and operations of spray guns for side-blown submerged molten bath smelting apparatus in accordance with embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may be a direct contact of the first and second features, or the first and second features may be indirectly through an intermediate medium, unless otherwise explicitly stated and defined. contact. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A spray gun for a side blow submerged combustion molten pool smelting device, comprising:

An inner nozzle having a medium inlet, a medium nozzle and a medium cleaning port;

An outer nozzle, the outer nozzle is sleeved on the inner nozzle and defines a cooling chamber together with the inner nozzle, the outer nozzle has a cooling gas inlet and cooling communicating with the cooling chamber Air vent

a seal disposed on the inner spout and movable between a closed position in which the medium cleaning port is closed and an open position in which the medium cleaning port is opened.
A spray gun for a side blow submerged combustion pool melting apparatus according to claim 1, wherein said outer nozzle is spaced apart from said inner nozzle to be disposed on an inner circumferential surface of said outer nozzle The cooling chamber is defined between at least a portion of an outer circumferential surface of the inner nozzle, the medium nozzle and the medium cleaning port are respectively located at two ends of the inner nozzle, and the medium inlet is located at the inner nozzle On the perimeter wall.
A spray gun for a side-blown immersion molten pool melting apparatus according to claim 2, wherein one end of said outer nozzle is provided with an outer nozzle method for sealing said one end of said outer nozzle And the outer nozzle is connected to the inner nozzle through the outer nozzle flange, the cooling gas inlet is located on a peripheral wall of the outer nozzle, and the cooling gas nozzle is located at the outer nozzle The other end.
The spray gun for a side blow submerged combustion bath melting apparatus according to claim 1, wherein said inner nozzle comprises:

a tube body, the medium nozzle is formed at one end of the tube body;

a three-way valve body having three valve ports respectively located at both ends of the three-way valve body and the peripheral wall of the three-way valve body, wherein one end of the three-way valve body a valve port communicates with the other end of the pipe body, a valve port located at the other end of the three-way valve body constitutes the medium cleaning port, and a valve port located on a peripheral wall of the three-way valve body constitutes a medium inlet, The sealing member is disposed in the three-way valve body and movable between a closed position for blocking the medium cleaning opening and an open position for opening the medium cleaning opening, and the three-way valve body is provided with a sealing member a sliding groove, the seal is movably fitted in the seal sliding groove between the open position and the closed position, and the seal sliding groove is outwardly and away from the medium cleaning port The direction of the cleaning port extends obliquely.
A spray gun for a side blow submerged combustion bath melting apparatus according to claim 4, wherein said three-way valve body is flanged to said tubular body by an inner nozzle.