Nozzle device and steel ladle oxygen-enriched combustion-supporting roaster

Abstract

The utility model provides a nozzle device and a steel ladle oxygen-enriched combustion-supporting roaster, and relates to the technical field of oxygen-enriched roaster, the nozzle device comprises a nozzle body, a main oxygen pipe, a gas pipe, an auxiliary oxygen pipe and an air pipe, a first mixing area and a second mixing area are arranged in the nozzle body, the first mixing area is communicated with the second mixing area, and the second mixing area is communicated with the main oxygen pipe. A fire spraying opening is formed in the first end of the nozzle body, and the first mixing area and the second mixing area are both communicated with the fire spraying opening; the outlet end of the main oxygen pipe and the outlet end of the gas pipe are both communicated with the first mixing area; the outlet end of the auxiliary oxygen pipe and the outlet end of the air pipe are both communicated with the second mixing area; the nozzle body, the main oxygen pipe, the coal gas pipe, the auxiliary oxygen pipe and the air pipe are matched with one another, coal gas can be fully combusted, high flame temperature and high heat radiation intensity are achieved, the combustion speed can be effectively increased, the baking efficiency is improved, the fuel utilization rate is high, combustion is thorough, pollutant emission is little, and green and energy-saving effects are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oxygen-enriched roaster technical field, concretely relates to a nozzle device and ladle oxygen-enriched combustion roaster. BACKGROUND

[0002] In the process of steel production, the ladle roaster is an indispensable important device. It is mainly used for roasting the ladle after new ladle is built and before molten steel is contained, so as to ensure that the ladle reaches the appropriate working condition.

[0003] The ladle roaster has rich types, mainly including online roaster and offline roaster two categories. Offline roaster can be divided into vertical roaster and horizontal roaster, and in addition, there is also intermediate ladle roaster specially used for roasting intermediate ladle. Different types of roasters play their own unique roles in different links of steel production.

[0004] The ladle roaster system is usually composed of oxygen-enriched nozzle, ignition system, gas pipeline system, bone powder system, oxygen pipeline system and control system, etc. At present, the traditional intermediate ladle roaster adopts the traditional nozzle, and there are some obvious deficiencies. The one-time roasting time is usually about 4-6 hours, which not only takes a long time, but also consumes a large amount of natural gas, and the temperature after roasting is only about 800 DEG C. There are defects such as long roasting time, large fuel consumption, low roasting temperature, high production cost, low production efficiency and insufficient combustion. INVENTION CONTENTS

[0005] The utility model discloses a nozzle device and ladle oxygen-enriched combustion roaster to solve the above-mentioned technical problems existing in the prior art. The preferred technical solutions in the many technical solutions provided by the utility model can produce many technical effects. Details are described below.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The utility model provides a nozzle device and ladle oxygen-enriched combustion roaster, including nozzle body, main oxygen pipe, coal gas pipe, auxiliary oxygen pipe and air pipe, wherein: the first mixing area and the second mixing area are arranged in the nozzle body, the first mixing area is linked with the second mixing area, the first end of the nozzle body is provided with the fire outlet, the first mixing area and the second mixing area are linked with the fire outlet, the outlet end of the main oxygen pipe and the outlet end of the coal gas pipe are linked with the first mixing area, the outlet end of the auxiliary oxygen pipe and the outlet end of the air pipe are linked with the second mixing area.

[0008] Preferably, the nozzle body comprises a center sleeve located at the inner side, the center sleeve comprises a communication section and a mixing section arranged in sequence, the diameter of the mixing section is larger than that of the communication section, and the inner cavity of the mixing section forms the first mixing area; the inlet end of the main oxygen pipe is located at the outer side of the nozzle body, the outlet end of the main oxygen pipe penetrates through the communication section and is inserted into the mixing section; the inner wall of the communication section and the outer wall of the main oxygen pipe form a first annular flow channel, and the coal gas pipe is connected and arranged on the center sleeve and communicates with the first annular flow channel.

[0009] Preferably, the outlet end of the main oxygen pipe is closed, and the end face and the peripheral wall of the outlet end of the main oxygen pipe are both provided with a first shunt hole, and the first shunt hole communicates with the first mixing area.

[0010] Preferably, the end of the first annular flow channel located close to the first mixing area is provided with a first shunt disc; the first shunt disc is uniformly provided with a first shunt groove in the circumferential direction, and the first shunt groove communicates with the first mixing area.

[0011] Preferably, the nozzle body comprises an outer sleeve, the outer sleeve is sleeved on the center sleeve, and the outer sleeve comprises a first sleeve body and a second sleeve body arranged in sequence, wherein: the auxiliary oxygen pipe communicates with the first sleeve body; the air pipe communicates with the second sleeve body; the second mixing area is arranged in the second sleeve body, the first sleeve body communicates with the second mixing area through an auxiliary oxygen distribution pipe, the number of the auxiliary oxygen distribution pipes is multiple, and all the auxiliary oxygen distribution pipes are uniformly distributed along the circumferential direction of the center sleeve.

[0012] Preferably, the second mixing area is arranged in the second sleeve body away from the side of the first sleeve body.

[0013] Preferably, the pipe wall of the mixing section is provided with a second shunt hole, and the first mixing area and the second mixing area communicate through the second shunt hole.

[0014] Preferably, the inner wall of the second sleeve body and the inner wall of the mixing section form a second annular flow channel, the second annular flow channel is provided with a second shunt disc at a position close to the flame spout; the second shunt disc is uniformly provided with a second shunt groove in the circumferential direction, and the second shunt groove communicates with the flame spout.

[0015] Preferably, the nozzle body comprises a refractory sleeve, the refractory sleeve is sleeved outside the outer sleeve, the refractory sleeve is provided with a filling cavity, and the filling cavity is filled with refractory material; the filling cavity is provided with an anchor for increasing the adhesion of the refractory material.

[0016] The utility model provides a kind of steel ladle oxygen-enriched combustion roaster, including the nozzle device of any preceding.

[0017] The utility model provides a kind of nozzle device and steel ladle oxygen-enriched combustion roaster at least has following beneficial effects:

[0018] The nozzle device includes nozzle body, main oxygen pipe, gas pipe, auxiliary oxygen pipe and air pipe, and the nozzle body is used for spraying fire, and the main oxygen pipe, gas pipe, auxiliary oxygen pipe and air pipe are respectively used for supplying main oxygen, gas, auxiliary oxygen and air.

[0019] The first mixing area and the second mixing area are communicated, the first end of the nozzle body is provided with a fire outlet, the first mixing area and the second mixing area are communicated with the fire outlet, the outlet end of the main oxygen pipe and the outlet end of the gas pipe are communicated with the first mixing area, the outlet end of the auxiliary oxygen pipe and the outlet end of the air pipe are communicated with the second mixing area, when spraying fire, main oxygen enters the first mixing area through the main oxygen pipe, gas enters the first mixing area through the gas pipe, the main oxygen and gas are mixed in the first mixing area, and then are sprayed out of the fire outlet for combustion, in this process, combustion-supporting oxygen enters the second mixing area through the auxiliary oxygen pipe, air enters the second mixing area through the air pipe, they are mixed, and then are mixed with part of the mixed gas flowing into the first mixing area and flow to the fire outlet, to play a combustion-supporting role.

[0020] The nozzle body, main oxygen pipe, gas pipe, auxiliary oxygen pipe and air pipe are cooperated with each other, can fully burn gas, not only have high flame temperature and high heat radiation intensity, can effectively accelerate combustion speed and improve roasting efficiency, but also have high fuel utilization rate, complete combustion, less pollutant emission and green energy saving. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor according to these drawings.

[0022] Figure 1 And Figure 2 It is the structure schematic diagram of the utility model;

[0023] Figure 3 It is the enlarged view of A part of the utility model;

[0024] Figure 4 It is the enlarged view of B part of the utility model;

[0025] Figure 5 is a structural schematic view of the shunt disc of the utility model;

[0026] Figure 6 is a schematic view of airflow of the utility model.

[0027] Reference signs

[0028] 1, nozzle body; 11, first mixing area; 12, second mixing area; 13, flame spouting port; 14, central sleeve; 141, communication section; 142, mixing section; 1421, second shunt hole; 15, first shunt disc; 151, first shunt groove; 16, auxiliary oxygen distribution pipe; 17, outer sleeve; 171, first sleeve body; 172, second sleeve body; 18, second shunt disc; 181, second shunt groove; 19, filling cavity; 191, anchor; 2, main oxygen pipe; 21, first shunt hole; 3, gas pipe; 4, auxiliary oxygen pipe; 5, air pipe. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the scope protected by the utility model.

[0030] Embodiment 1:

[0031] The utility model provides a kind of nozzle device, reference Figures 1 to 4 As shown in the drawing, the nozzle device includes nozzle body 1, main oxygen pipe 2, gas pipe 3, auxiliary oxygen pipe 4 and air pipe 5.

[0032] Nozzle body 1 is provided with first mixing area 11 and second mixing area 12, and first mixing area 11 and second mixing area 12 are communicated, and the first end of nozzle body 1 is provided with flame spouting port 13, and first mixing area 11 and second mixing area 12 are communicated with flame spouting port 13;The outlet end of main oxygen pipe 2 and the outlet end of gas pipe 3 are both communicated with first mixing area 11;The outlet end of auxiliary oxygen pipe 4 and the outlet end of air pipe 5 are both communicated with second mixing area 12.

[0033] When working, main oxygen enters first mixing area 11 through main oxygen pipe 2, and gas enters first mixing area 11 through gas pipe 3, and they are mixed in first mixing area 11, and then are injected and ignited through flame spouting port 13.

[0034] Auxiliary oxygen enters into the second mixing area 12 through the auxiliary oxygen pipe 4, and the combustion air enters into the second mixing area 12 through the air pipe 5, and the two are mixed in the second mixing area 12, in the process, part of the mixed gas in the first mixing area 11 can flow into the second mixing area 12, and then is injected and ignited through the flame port 13.

[0035] The utility model discloses a nozzle body 1, main oxygen pipe 2, gas pipe 3, auxiliary oxygen pipe 4 and air pipe 5 cooperate with each other, not only have higher high flame temperature and high thermal radiation intensity, can effectively accelerate the combustion speed, improve the baking efficiency, and fuel utilization rate is high, burns completely, and the pollutant emission is less, and green energy -conserving.

[0036] Example 2:

[0037] Example 2 is established on the basis of example 1:

[0038] As Figures 1 to 6 The nozzle body 1 includes the central sleeve 14 located on the inside, and the central sleeve 14 includes the communication section 141 and the mixing section 142 arranged in sequence, the diameter of the mixing section 142 is greater than the diameter of the communication section 141, and the inner cavity of the mixing section 142 forms the first mixing area 11.

[0039] The inlet end of the main oxygen pipe 2 is located on the outside of the nozzle body 1, the outlet end of the main oxygen pipe 2 penetrates through the second end of the nozzle body 1 and is inserted into the mixing section 142 along the communication section 141, that is, the central sleeve 14 is sleeved on the outside of the main oxygen pipe 2, and the central sleeve 14 is welded with the main oxygen pipe 2.

[0040] The inner wall of the communication section 141 and the outer wall of the main oxygen pipe 2 surround the first annular flow channel, the gas pipe 3 is vertically connected to the central sleeve 14 and is connected with the first annular flow channel, the gas pipe 3 is located at the position close to the second end of the nozzle body 1, and the first annular flow channel is a gas conveying flow channel and can stably convey the gas into the first mixing area 11.

[0041] As an optional implementation, the main oxygen pipe 2 is a blind pipe, the outlet end of the main oxygen pipe 2 is closed, and the end face and the peripheral wall of the outlet end of the main oxygen pipe 2 are uniformly and densely provided with the first shunt hole 21, and the first shunt hole 21 is connected with the first mixing area 11.

[0042] In this way, the gas can uniformly enter into the first mixing area 11 and can be rapidly mixed with the main oxygen.

[0043] As an optional implementation, the end portion of the first annular flow channel close to the first mixing area 11 is provided with the first shunt disc 15, the first shunt disc 15 is uniformly provided with the first shunt groove 151 in the circumferential direction, and the first shunt groove 151 is connected with the first mixing area 11.

[0044] The first shunt disc 15 has a shunting effect, so that the gas can uniformly enter into the first mixing area 11.

[0045] Specifically, the first shunt disc 15 is provided in the form of a toothed disc, a mounting hole is arranged at the center position of the toothed disc, the toothed disc is fixedly sleeved onto the main oxygen pipe 2 through the mounting hole, and tooth grooves are uniformly arranged along the circumferential direction of the outer periphery of the toothed disc, and the tooth grooves form first shunt grooves 151.

[0046] As an optional embodiment, the nozzle body 1 comprises an outer sleeve 17, which is sleeved on the central sleeve 14 and is welded with the central sleeve 14.

[0047] The outer sleeve 17 comprises a first sleeve body 171 and a second sleeve body 172 arranged in sequence, and a partition plate is arranged between the first sleeve body 171 and the second sleeve body 172.

[0048] The auxiliary oxygen pipe 4 is in vertical communication with the first sleeve body 171, the air pipe 5 is in vertical communication with the second sleeve body 172, the diameter of the air pipe 5 is greater than that of the auxiliary oxygen pipe 4, the air pipe 5 is located below the auxiliary oxygen pipe 4, the second mixing area 12 is arranged in the second sleeve body 172, the first sleeve body 171 is in communication with the second mixing area 12 through an auxiliary oxygen distribution pipe 16, the auxiliary oxygen distribution pipe 16 penetrates through the partition plate, the number of the auxiliary oxygen distribution pipes 16 is multiple, all the auxiliary oxygen distribution pipes 16 are uniformly distributed along the circumferential direction of the central sleeve 14, and the auxiliary oxygen distribution pipes 16 can effectively transport the auxiliary oxygen gas entering into the first sleeve body 171 into the second mixing area 12.

[0049] As an optional embodiment, the second mixing area 12 is arranged on the side away from the first sleeve body 171 in the second sleeve body 172, and the second mixing area 12 is annularly arranged outside the central sleeve 14.

[0050] The second mixing area 12 is divided into a front half and a rear half according to the gas flow direction, wherein the front half is used for mixing the auxiliary oxygen gas and the air, and the rear half is used for mixing the mixed combustion air and the mixed gas.

[0051] As an optional embodiment, the pipe wall of the mixing section 142 is uniformly distributed with second shunt holes 1421 along the circumferential direction, and the first mixing area 11 and the second mixing area 12 are in communication through the second shunt holes 1421.

[0052] In this way, the mixed gas and the mixed combustion air can be quickly mixed.

[0053] As an optional embodiment, the inner wall of the second sleeve body 172 and the inner wall of the mixing section 142 form a second annular flow channel, a second shunt disc 18 is arranged in the second annular flow channel and located close to the flame port 13, second shunt grooves 181 are uniformly arranged along the circumferential direction of the second shunt disc 18, and the second shunt grooves 181 are in communication with the flame port 13.

[0054] The second flow distribution disc 18 has similar structure and function as the first flow distribution disc 15, and thus is not described herein.

[0055] As an optional embodiment, the nozzle body 1 comprises a refractory sleeve, which is arranged outside the outer sleeve 17, and a filling cavity 19 is arranged in the refractory sleeve, and the filling cavity 19 is filled with a refractory material; and the refractory sleeve has good refractory effect.

[0056] An anchor 191 is arranged in the filling cavity 19, and a plurality of anchors 191 are uniformly distributed in the filling cavity 19, and the anchors 191 are used to enhance the adhesion of the refractory material.

[0057] The nozzle device has a total oxygen amount of 250 m 3 / h, a total gas amount of 150 m 3 / h, and only 4 hours are needed to reach a temperature above 1000 DEG C, and the nozzle device has at least the following characteristics:

[0058] (1) high flame temperature and high heat radiation intensity;

[0059] (2) accelerating the combustion speed and promoting complete combustion;

[0060] (3) reducing the ignition temperature of fuel and reducing the burnout time;

[0061] (4) increasing the heat utilization rate;

[0062] (5) reducing the excess air coefficient, reducing the amount of flue gas after combustion, and reducing heat loss;

[0063] (6) reducing the content of nitrogen oxides in flue gas, and meeting the environmental protection requirements.

[0064] Example 3

[0065] Example 3 is established on the basis of example 2:

[0066] The utility model provides a kind of steel ladle oxygen-enriched combustion-supporting roaster, and the steel ladle oxygen-enriched combustion-supporting roaster includes the nozzle device.

[0067] In the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0068] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and are not to be construed as indicating or implying relative importance or an ordered ranking of the indicated technical features. Thus, a feature defined with "first", "second" or "third" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" or "several" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0069] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0070] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this. Any skilled person in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A nozzle device, characterized in that: It includes the nozzle body, main oxygen pipe, gas pipe, auxiliary oxygen pipe and air pipe, among which: The nozzle body is provided with a first mixing zone and a second mixing zone, the first mixing zone and the second mixing zone are connected, a first end of the nozzle body is provided with a flame vent, the first mixing zone and the second mixing zone are both connected to the flame vent; The outlet end of the main oxygen pipe and the outlet end of the gas pipe are both connected to the first mixing zone; The outlet end of the auxiliary oxygen tube and the outlet end of the air tube are both connected to the second mixing zone.

2. The nozzle device according to claim 1, characterized in that The nozzle body includes a central sleeve located inside, the central sleeve includes a connecting section and a mixing section arranged in sequence, the diameter of the mixing section is larger than the diameter of the connecting section, and the inner cavity of the mixing section forms the first mixing zone; The inlet end of the main oxygen pipe is located outside the nozzle body, and the outlet end of the main oxygen pipe passes through the connecting section and is inserted into the mixing section; The inner wall of the connecting section and the outer wall of the main oxygen pipe form a first annular flow channel. The gas pipe is connected to the central sleeve and communicates with the first annular flow channel.

3. The nozzle device according to claim 2, characterized in that The outlet end of the main oxygen pipe is sealed, and a first diversion hole is provided on the end surface and the peripheral wall of the outlet end of the main oxygen pipe. The first diversion hole is connected to the first mixing zone.

4. The nozzle device according to claim 2, characterized in that A first diverter plate is provided in the first annular flow channel at an end close to the first mixing zone; The first diverter plate is evenly provided with first diverter grooves along the circumference, and the first diverter grooves are communicated with the first mixing zone.

5. The nozzle device according to claim 2, characterized in that The nozzle body includes an outer sleeve, which is sleeved on the central sleeve. The outer sleeve includes a first sleeve body and a second sleeve body which are sequentially arranged, wherein: The auxiliary oxygen tube is connected to the first sleeve body; The air pipe is connected to the second sleeve body; The second mixing zone is arranged in the second sleeve body, and the first sleeve body is connected to the second mixing zone through an auxiliary oxygen distribution pipe. The number of the auxiliary oxygen distribution pipes is set to be multiple, and all the auxiliary oxygen distribution pipes are evenly distributed along the circumference of the central sleeve.

6. The nozzle device according to claim 5, characterized in that The second mixing zone is arranged in the second sleeve body at a side away from the first sleeve body.

7. The nozzle device according to claim 5, characterized in that A second diversion hole is provided on the tube wall of the mixing section, and the first mixing area and the second mixing area are connected through the second diversion hole.

8. The nozzle device according to claim 5, characterized in that The inner wall of the second sleeve body and the inner wall of the mixing section form a second annular flow channel, and a second diverter plate is provided in the second annular flow channel near the flame vent; Second diverter grooves are evenly arranged on the second diverter plate along the circumference, and the second diverter grooves are communicated with the blast port.

9. The nozzle device according to claim 5, characterized in that The nozzle body comprises a refractory sleeve, the refractory sleeve is arranged outside the outer sleeve, a filling cavity is arranged in the refractory sleeve, and the filling cavity is filled with refractory material; An anchoring piece for increasing the adhesion of the refractory material is provided in the filling cavity.

10. A ladle oxygen-enriched combustion-supporting baking device, characterized in that: A nozzle device comprising the nozzle device according to any one of claims 1 to 9.

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