Energy-saving sleeve kiln burner

By adopting diffusion combustion and flow control in the burner of the sleeve kiln, the problem of uneven temperature caused by premixed combustion was solved, achieving uniform calcination of ore and saving gas, thus improving product stability and gas utilization efficiency.

CN223659998UActive Publication Date: 2025-12-12TIBET CHANGDU XIANGCHEN MAGNESIUM IND CO LTD
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Patent Information

Application Number
CN202520066692.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-13
Publication Date
2025-12-12
Estimated Expiration
2035-01-13

AI Technical Summary

Technical Problem

The premixed combustion method of existing sleeve kiln burners leads to localized excessively high or low temperatures, poor flame penetration, resulting in over- or under-burning of materials, and is difficult to adjust, resulting in unstable product indicators.

Method used

The diffusion combustion method is adopted, in which primary combustion air, secondary combustion air and gas are respectively placed on the kiln wall in an alternating layout, and the flow rate is controlled by natural gas regulating valve and electric regulating valve. Combined with the inner ignition burner, uniform combustion of gas is achieved.

Benefits of technology

This ensures uniform heating of the ore within the kiln, preventing over- or under-firing, improving product stability and gas utilization efficiency, and reducing gas consumption.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses an energy-saving sleeve kiln burner which comprises a kiln wall, and the kiln wall comprises a preheating zone quick-drying castable seat, common high-alumina bricks arranged above the preheating zone quick-drying castable seat and a refractory material masonry layer arranged above the common high-alumina bricks. Two groups of preheating zone quick-drying castable seats, two groups of common high-alumina bricks and two groups of refractory material masonry layers are arranged and are in an inner-outer double-layer design to respectively form an inner cylinder and an outer cylinder, five groups of heat-resistant steel measuring hole pipes with different heights are arranged on the refractory material masonry layers, and a thermocouple and an ignition burner are arranged on the outer cylinder. According to the energy-saving sleeve kiln burner, premixing combustion is changed into diffusion combustion, a better calcination effect is achieved, heat and temperature after natural gas is combusted are more controllable through the natural gas adjusting valve and the electric adjusting valve, the ignition burner is arranged on the inner side of the kiln wall, the periphery of ore is evenly heated and calcined, and the energy-saving effect is achieved. Ore in the kiln wall cannot be over-burnt or under-burnt.
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Description

TECHNICAL FIELD

[0001] The utility model relates to a sleeve kiln, in particular to an energy -conserving sleeve kiln burner. BACKGROUND

[0002] The sleeve kiln is a kind of vertical firing equipment, mainly used for magnesite or limestone, its structure is composed of outer cylinder and inner cylinder, raw materials enter from upper part, complete calcination in the interior through rotation process, then discharge finished product from lower part.A core structure on the sleeve kiln is sleeve kiln burner, the main function of sleeve kiln burner is to provide high-temperature flame, for heating and burning various fuels.The burner produces high-temperature flame by spraying gas and igniting, and is widely used in various occasions.

[0003] The layout of the existing sleeve kiln burner is generally premixed combustion mode, and there are the following disadvantages:

[0004] 1), premixed combustion exists local temperature too high, causes overburning of material, and cannot reach market demand on index;

[0005] 2), the flame penetration of burner is poor, the distance between sleeve kiln body is generally about 1 meter;Cannot make the flame completely penetrate, causing some materials to be underburned, which cannot meet market demand in index;

[0006] 3), even if the underburned material and overburned material are mixed, personnel still need to pick out a large amount of products after kiln, and the index is unstable;

[0007] 4), based on the above characteristics, the adjustment of kiln burner is difficult, which is not conducive to overall control. UTILITY MODEL CONTENTS

[0008] The utility model aims at providing a kind of energy -conserving sleeve kiln burner, the mode of burner is changed from premixed combustion to diffusion combustion, primary combustion-supporting wind, secondary combustion-supporting wind and fuel gas are respectively set and divided and set on kiln wall, the position of fuel gas and combustion-supporting wind is staggered, better calcination effect is achieved, the flow of natural gas regulating valve and electric regulating valve are controlled respectively, so that the heat and temperature after natural gas combustion are more controllable, ignition burner is set on the inner side of kiln wall, fuel gas burns in the gap of ore, so that ore is evenly heated and calcined around, and the ore in the interior of kiln wall will not be overburned or underburned.

[0009] To achieve the above object, the utility model provides the following technical scheme: an energy -saving sleeve kiln nozzle, including kiln wall, the kiln wall includes preheating zone quick -drying castable seat, the ordinary high alumina brick of setting in preheating zone quick -drying castable seat top and the refractory masonry layer of setting in ordinary high alumina brick top, preheating zone quick -drying castable seat, ordinary high alumina brick and refractory masonry layer all are provided with two groups, and are inside and outside double -deck formula design, respectively constitute the inner tube and the outer tube of this energy -saving sleeve kiln nozzle, be provided with five groups different height's heat -resistant steel measuring hole pipe on refractory masonry layer, the first group heat -resistant steel measuring hole pipe, third group heat -resistant steel measuring hole pipe and the fifth group heat -resistant steel measuring hole pipe the circumferential direction of the height where they are located is provided with a plurality of first heat -resistant steel reducing pipe and a plurality of third heat -resistant steel reducing pipe, the circumferential direction of the height where second group heat -resistant steel measuring hole pipe and fourth group heat -resistant steel measuring hole pipe are located is provided with a plurality of second heat -resistant steel reducing pipe and a plurality of fourth heat -resistant steel reducing pipe, be provided with thermocouple and ignition nozzle on the outer tube, and one side of thermocouple is provided with oxygen probe.

[0010] Preferably, the first heat -resistant steel reducing pipe and the third heat -resistant steel reducing pipe of the first group heat -resistant steel measuring hole pipe, the third group heat -resistant steel measuring hole pipe and the fifth group heat -resistant steel measuring hole pipe are staggered, and each first heat -resistant steel reducing pipe corresponds to two third heat -resistant steel reducing pipes, and the first group heat -resistant steel measuring hole pipe, the third group heat -resistant steel measuring hole pipe and the fifth group heat -resistant steel measuring hole pipe are all arranged on the outer tube.

[0011] Preferably, the second heat -resistant steel reducing pipe and the fourth heat -resistant steel reducing pipe of the second group heat -resistant steel measuring hole pipe and the fourth group heat -resistant steel measuring hole pipe are staggered, and each second heat -resistant steel reducing pipe corresponds to two fourth heat -resistant steel reducing pipes, and the second group heat -resistant steel measuring hole pipe and the fourth group heat -resistant steel measuring hole pipe are all arranged on the inner tube.

[0012] Preferably, a natural gas hand valve and an air hand valve located on one side of the natural gas hand valve are further arranged at the position of the outer tube where the thermocouple is located.

[0013] Preferably, a natural gas regulating valve is arranged on the natural gas hand valve, and an electric regulating valve is arranged on the air hand valve.

[0014] Preferably, lightweight high alumina bricks are arranged on the inner and outer sides of the ordinary high alumina bricks.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] 1), the way of nozzle is changed from premixed combustion to diffusion combustion, primary combustion air, secondary combustion air and gas are evenly arranged on the kiln wall, the positions of gas and combustion air are staggered, and they complement and influence each other, so that the gas can be more fully and uniformly burned, and the heat generated after combustion can be more uniformly distributed in the kiln wall, so as to achieve better calcination effect;

[0017] 2) The natural gas pipeline is equipped with a natural gas regulating valve, and the combustion air pipeline is equipped with an electric regulating valve to control their flow rates, making the flow rates of natural gas and air more controllable, and making the heat and temperature of natural gas combustion more controllable.

[0018] 3) Installing ignition burners inside the kiln wall ensures safety, allows the gas to burn in the gaps between the ore, and ensures that the ore is heated and calcined evenly around the kiln wall, preventing over- or under-burning of the ore inside the kiln wall.

[0019] 4) In summary, the ore can be heated evenly during calcination, eliminating over-burning and under-burning, and the loss on ignition and activity indicators are stable; the fuel gas can burn evenly inside the kiln, reducing the fuel gas consumption for calcining the ore; the fuel gas consumption of the premixed combustion was 170 m³ / ton in the early stage, but now it has been changed to diffusion combustion, and the fuel gas consumption is 140 m³ / ton, saving fuel gas consumption and reducing costs. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the present invention;

[0021] Figure 2 This utility model Figure 1 A schematic diagram of the cross-section along the AA direction;

[0022] Figure 3 This utility model Figure 1 Schematic diagram of the cross section in the BB direction;

[0023] Figure 4 This utility model Figure 1 A schematic diagram of the cross-section in the CC direction;

[0024] Figure 5 This utility model Figure 1 A schematic diagram of the cross-section along the DD direction;

[0025] Figure 6 This utility model Figure 1 A schematic diagram of the cross-section along the EE direction;

[0026] Figure 7 This is a partial cross-sectional view of the present invention;

[0027] Figure 8 This utility model Figure 7 A schematic diagram of the cross-section in the FF direction;

[0028] Figure 9 This utility model Figure 8 Enlarged view of the middle section structure.

[0029] The reference signs and names in the drawing are as follows: 1, first heat-resistant steel reducing pipe; 2, second heat-resistant steel reducing pipe; 3, third heat-resistant steel reducing pipe; 4, fourth heat-resistant steel reducing pipe; 5, heat-resistant steel measuring hole pipe; 6, thermocouple; 7, ignition burner; 8, natural gas hand valve; 9, natural gas regulating valve; 10, oxygen probe; 11, air hand valve; 12, electric regulating valve; 13, kiln wall; 131, preheating zone fast-drying castable seat; 132, ordinary high-alumina brick; 133, refractory masonry layer; 134, light high-alumina brick. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0031] In the description of the embodiments of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element indicated 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. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more of the features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0032] In the embodiments of the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0033] Please refer to Figure 1The utility model provides an embodiment: a kind of energy-saving sleeve kiln burner, including kiln wall 13, kiln wall 13 includes preheating zone fast dry castable seat 131, the ordinary high alumina brick 132 being set in preheating zone fast dry castable seat 131 upper and the refractory masonry layer 133 being set in ordinary high alumina brick 132 upper, preheating zone fast dry castable seat 131, ordinary high alumina brick 132 and refractory masonry layer 133 are all provided with two groups, and it is inside and outside double-layer design, respectively constitute the inner cylinder and outer cylinder of the energy-saving sleeve kiln burner, and ordinary high alumina brick 132 is provided with lightweight high alumina brick 134 in inside and outside two sides.

[0034] Please refer to Figures 2 to 6 Five groups of different height heat-resistant steel measuring hole pipes 5 are arranged on the refractory masonry layer 133, a plurality of first heat-resistant steel reducing pipes 1 and a plurality of third heat-resistant steel reducing pipes 3 are arranged in the circumferential direction at the height of the first group of heat-resistant steel measuring hole pipes 5, the third group of heat-resistant steel measuring hole pipes 5 and the fifth group of heat-resistant steel measuring hole pipes 5, a plurality of second heat-resistant steel reducing pipes 2 and a plurality of fourth heat-resistant steel reducing pipes 4 are arranged in the circumferential direction at the height of the second group of heat-resistant steel measuring hole pipes 5 and the fourth group of heat-resistant steel measuring hole pipes 5, the first heat-resistant steel reducing pipes 1 and the third heat-resistant steel reducing pipes 3 at the height of the first group of heat-resistant steel measuring hole pipes 5, the third group of heat-resistant steel measuring hole pipes 5 and the fifth group of heat-resistant steel measuring hole pipes 5 are arranged alternately, and each first heat-resistant steel reducing pipe 1 corresponds to two third heat-resistant steel reducing pipes 3, the first group of heat-resistant steel measuring hole pipes 5, the third group of heat-resistant steel measuring hole pipes 5 and the fifth group of heat-resistant steel measuring hole pipes 5 are arranged on the outer cylinder, the second heat-resistant steel reducing pipes 2 and the fourth heat-resistant steel reducing pipes 4 at the height of the second group of heat-resistant steel measuring hole pipes 5 and the fourth group of heat-resistant steel measuring hole pipes 5 are arranged alternately, and each second heat-resistant steel reducing pipe 2 corresponds to two fourth heat-resistant steel reducing pipes 4, the second group of heat-resistant steel measuring hole pipes 5 and the fourth group of heat-resistant steel measuring hole pipes 5 are arranged on the inner cylinder; in addition, Figure 2 In the specific embodiment, the first heat-resistant steel reducing pipe 1 and the two third heat-resistant steel reducing pipes 3 on one side thereof form an included angle a and an included angle b respectively, the value of the included angle a is between 5°-12°, and the value of the included angle b is between 8°-16°, Figure 3 In the specific embodiment, the two adjacent second heat-resistant steel reducing pipes 2 form an included angle c, and the value of the included angle c is between 24°-38°, Figure 4 In the specific embodiment, the two adjacent first heat-resistant steel reducing pipes 1 form an included angle d, and the value of the included angle d is between 3°-6°, Figure 5 In the specific embodiment, the heat-resistant steel measuring hole pipe 5 and the nearest second heat-resistant steel reducing pipe 2 form an included angle g, the second heat-resistant steel reducing pipe 2 and the fourth heat-resistant steel reducing pipe 4 on one side thereof form an included angle h, the value of the included angle g is between 10°-15°, and the value of the included angle h is between 20°-28°, Figure 6In the middle, the first heat-resistant steel reducer 1 and the third heat-resistant steel reducer 3 on one side of the first heat-resistant steel reducer 1 form an included angle i, and the value of the included angle i is between 18°-25°.

[0035] Please refer to Figures 7 to 9 The outer cylinder is provided with a thermocouple 6 and an ignition burner 7, one side of the thermocouple 6 is provided with an oxygen probe 10, the outer cylinder is provided with a natural gas hand valve 8 at the position of the thermocouple 6 and an air hand valve 11 at the side of the natural gas hand valve 8, the natural gas hand valve 8 is provided with a natural gas regulating valve 9, and the air hand valve 11 is provided with an electric regulating valve 12, and the electric regulating valve 12 is interlocked with the oxygen probe 10.

[0036] It is obvious for those skilled in the art that the utility model is not limited to the details of the above-mentioned exemplary embodiments, and the utility model can be realized in other specific forms without departing from the spirit or basic characteristics of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the utility model is defined by the appended claims instead of the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An energy-saving sleeve kiln burner, comprising a kiln wall (13), characterized in that: The kiln wall (13) includes a preheating zone quick-drying castable base (131), ordinary high-alumina bricks (132) placed above the preheating zone quick-drying castable base (131), and a refractory material masonry layer (133) placed above the ordinary high-alumina bricks (132). The preheating zone quick-drying castable base (131), ordinary high-alumina bricks (132), and refractory material masonry layer (133) are all provided in two sets and are designed as inner and outer double layers, forming an inner cylinder and an outer cylinder, respectively. Five sets of heat-resistant steel measuring tubes (5) of different heights are provided on the refractory material masonry layer (133). The first set of heat-resistant steel measuring tubes (5) of different heights are provided on the refractory material masonry layer (133). Multiple first heat-resistant steel reducing pipes (1) and multiple third heat-resistant steel reducing pipes (3) are arranged in the circumferential direction at the height of the heat-resistant steel measuring hole pipe (5), the third group of heat-resistant steel measuring hole pipes (5) and the fifth group of heat-resistant steel measuring hole pipes (5). Multiple second heat-resistant steel reducing pipes (2) and multiple fourth heat-resistant steel reducing pipes (4) are arranged in the circumferential direction at the height of the second group of heat-resistant steel measuring hole pipes (5) and the fourth group of heat-resistant steel measuring hole pipes (5). A thermocouple (6) and an ignition burner (7) are arranged on the outer cylinder. An oxygen probe (10) is arranged on one side of the thermocouple (6).

2. The energy-saving sleeve kiln burner according to claim 1, characterized in that: The first heat-resistant steel measuring tube (5), the third heat-resistant steel measuring tube (5), and the fifth heat-resistant steel measuring tube (5) are arranged at different heights by the first heat-resistant steel reducing tube (1) and the third heat-resistant steel reducing tube (3), and each first heat-resistant steel reducing tube (1) corresponds to two third heat-resistant steel reducing tubes (3). The first heat-resistant steel measuring tube (5), the third heat-resistant steel measuring tube (5), and the fifth heat-resistant steel measuring tube (5) are all set on the outer cylinder.

3. The energy-saving sleeve kiln burner according to claim 1, characterized in that: The second heat-resistant steel measuring tube (5) and the fourth heat-resistant steel measuring tube (5) at the same height are staggered, and each second heat-resistant steel measuring tube (2) corresponds to two fourth heat-resistant steel measuring tubes (4). The second heat-resistant steel measuring tube (5) and the fourth heat-resistant steel measuring tube (5) are both located on the inner cylinder.

4. The energy-saving sleeve kiln burner according to claim 1, characterized in that: The outer cylinder is also equipped with a natural gas hand valve (8) and an air hand valve (11) located on one side of the natural gas hand valve (8).

5. The energy-saving sleeve kiln burner according to claim 4, characterized in that: The natural gas hand valve (8) is equipped with a natural gas regulating valve (9), and the air hand valve (11) is equipped with an electric regulating valve (12). The electric regulating valve (12) is interlocked with the oxygen probe (10).

6. The energy-saving sleeve kiln burner according to claim 1, characterized in that: Lightweight high-alumina bricks (134) are provided on both the inner and outer sides of the ordinary high-alumina brick (132).