Combined spray gun for double-chamber kiln

Abstract

The utility model discloses a combined spray gun for a double-chamber kiln, which belongs to the technical field of spraying devices and comprises a spray gun body and a replaceable spray head, the spray head comprises a spray head body, a nozzle, a heat insulation layer and an outer protective tube, the upper end of the spray head body is fixed with the lower end of the spray gun body, and the lower end of the spray head body is fixed with the nozzle; an outer protection pipe is arranged outside the heat insulation layer, and a locking structure is arranged between the nozzle body and the outer protection pipe. The thermal insulation layer and the outer protection tube are sequentially arranged outside the spray head body and the nozzle, so that the spray head has the characteristics of high temperature resistance and wear resistance, and can be suitable for the calcining environment in the double-chamber lime kiln. After the spray gun is burnt out, the replaceable spray head can be welded and fixed, and the original design length of the spray gun of the double-chamber kiln can be recovered, so that the spray gun has a recycling function, the service life of the spray gun body is prolonged, the maintenance and operation cost of the double-chamber lime kiln is reduced, and the use efficiency of equipment is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spray devices, in particular to a combined spray gun for a double-chamber kiln. Background Art

[0002] The lime kiln is the core equipment in the lime production process. Raw limestone is heated to 1100°C in the kiln and calcined to produce the finished lime. The twin-chamber kiln is the most advanced vertical kiln in the lime production process. During the production process, fuels such as pulverized coal or gas are evenly sprayed into the kiln chamber through lances installed on the kiln. This provides heat and ensures that the stone inside the kiln can be calcined into high-quality finished lime. Because the lances are located in a harsh environment with high temperatures and are constantly subjected to limestone erosion, the ends of the lances often burn due to the flames and friction with the material, gradually shortening the lances and disrupting the balance of the kiln's calcination system. This ultimately makes the kiln more difficult to operate and affects the quality of the lime product.

[0003] Currently, when a lance becomes shorter, the entire lance is usually replaced, resulting in excessive material waste. In response, researchers have developed a reusable double-chamber kiln lance that allows the lance body to be reused repeatedly and meets the requirements of the lime calcination process. Utility Model Content

[0004] The utility model provides a combined spray gun for a double-chamber kiln, aiming to solve the technical problems in the prior art of severe burnout and gradual shortening of the spray gun ends of the double-chamber kiln, affecting the quality of lime products, and causing material waste by replacing the spray gun as a whole.

[0005] In order to achieve the above purpose, the technical solutions adopted by the present utility model are as follows:

[0006] A combined spray gun for a double-chamber kiln includes a spray gun body and a replaceable spray head. The spray head includes a spray head body, a nozzle, an insulation layer and an outer protective tube. The upper end of the spray head body is fixedly connected to the lower end of the spray gun body. The lower end of the spray head body is fixed with a nozzle. The insulation layer is arranged on the outside of the spray head body and the nozzle. The outer protective tube is provided on the outside of the insulation layer. A locking structure is provided between the spray head body and the outer protective tube.

[0007] Furthermore, the locking structure includes a locking nut and a locking cone ring, the locking nut is threadedly engaged with the outer wall of the upper end of the nozzle body, the locking cone ring is a conical tube with a larger upper portion and a smaller lower portion, and the inner hole at the upper end of the outer protective tube is a trumpet hole with a larger upper portion and a smaller lower portion, and the locking cone ring is arranged in a conical ring cavity formed by the locking nut, the nozzle body, and the trumpet hole at the upper end of the outer protective tube; the thermal insulation layer is arranged between the nozzle body and the outer protective tube below the locking cone ring.

[0008] Furthermore, the connection between the upper end of the locking nut and the nozzle body is welded and fixed.

[0009] Furthermore, the inner hole at the lower end of the outer protective tube is a trumpet hole that is smaller at the top and larger at the bottom, the nozzle is a conical tube that matches the trumpet hole at the lower end of the outer protective tube, and a high-temperature resistant lining layer is provided between the nozzle and the nozzle body.

[0010] Furthermore, the material of the lining layer is ceramic.

[0011] Furthermore, the outer protective tube is made of zirconia.

[0012] Furthermore, the heat insulation layer is formed by coating with heat insulation material.

[0013] Furthermore, the material of the spray gun body is 0Cr25Ni20 stainless steel.

[0014] Furthermore, the nozzle body is fixed to the spray gun body by welding, and the nozzle body is fixed to the nozzle by welding.

[0015] Compared with the prior art, the technical progress achieved by this utility model is:

[0016] This utility model secures a nozzle body and a nozzle to the lower end of the spray gun body. A heat-insulating layer and an outer protective tube are sequentially provided on the exterior of the nozzle body and nozzle, and the outer protective tube is secured to the nozzle body via a locking mechanism. This nozzle is both heat-resistant and wear-resistant, making it suitable for the calcining environment within a double-chamber lime kiln. This utility model allows for the replacement nozzle to be welded and secured after a burnout of the spray gun, restoring the original design length of the double-chamber kiln spray gun and enabling its repeated use. This extends the service life of the spray gun body, reduces maintenance and operating costs of the double-chamber lime kiln, and improves equipment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0018] In the attached figure:

[0019] Figure 1 A schematic structural diagram of a combined spray gun for a double-chamber kiln provided in an embodiment of the utility model;

[0020] Figure 2 This is a schematic structural diagram of the inner and outer protective tubes in an embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of the coordination of the nozzle and its internal lining layer in an embodiment of the present utility model.

[0022] In the picture:

[0023] 100-spray gun body; 200-spray head, 201-spray head body, 202-locking nut, 203-locking cone ring, 204-outer protective tube, 205-thermal insulation layer, 206-nozzle, 207-inner lining layer. DETAILED DESCRIPTION

[0024] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The following embodiments of the present invention will be described in conjunction with the accompanying drawings.

[0025] like Figure 1 As shown, an embodiment of the utility model provides a combined spray gun for a double-chamber kiln, comprising a spray gun body 100 and a replaceable nozzle 200, wherein the nozzle 200 comprises a nozzle body 201, a nozzle 206, a heat-insulating layer 205 and an outer protective tube 204, wherein the upper end of the nozzle body 201 is fixedly connected to the lower end of the spray gun body 100, and the nozzle 206 is fixed to the lower end of the nozzle body 201, and the heat-insulating layer 205 is arranged on the outside of the nozzle body 201 and the nozzle 206 to adapt to the high temperature environment of the double-chamber kiln; an outer protective tube 204 is provided on the outside of the heat-insulating layer 205, which can provide protection and has the characteristics of wear resistance; a locking structure is provided between the nozzle body 201 and the outer protective tube 204. When the spray gun body 100 is gradually shortened due to long-term flame calcination and limestone erosion in the double-bore lime kiln, the burned part of the spray gun body 100 is cut off and then the replaceable spray gun head 200 is fixed by welding to replenish the burned part, thereby restoring the original design length of the double-bore kiln spray gun, so that the spray gun body can be repeatedly recycled and can meet the requirements of the lime calcination process.

[0026] As a preferred configuration, the locking mechanism comprises a locking nut 202 and a locking cone ring 203. The locking nut 202 is threadedly engaged with the outer wall of the upper end of the nozzle body 201. The locking cone ring 203 is a conical tube with a smaller diameter at the top. The inner hole at the upper end of the outer protective tube 204 is a trumpet hole with a larger diameter at the top and a smaller diameter at the bottom. The locking cone ring 203 is positioned within the conical ring cavity formed by the locking nut 202, the nozzle body 201, and the trumpet hole at the upper end of the outer protective tube 204. The thermal insulation layer 205 is positioned below the locking cone ring 203 between the nozzle body 201 and the outer protective tube 204. The tightening force of the locking nut locks the outer protective tube to the outside of the nozzle body through the locking cone ring. To prevent loosening, the upper end of the locking nut 202 is welded to the nozzle body 201.

[0027] When designing specifically, Figure 2 、 Figure 3As shown, the inner hole at the lower end of the outer protective tube 204 is a trumpet-shaped hole that is smaller at the top and larger at the bottom. The nozzle 206 is a conical tube that matches the trumpet-shaped hole at the lower end of the outer protective tube 204. A high-temperature resistant lining layer 207 is provided between the nozzle 206 and the nozzle body 201. The material of the lining layer 207 is ceramic, which can enhance the internal wear resistance of the nozzle 206.

[0028] During specific manufacturing, the outer protective tube 204 is made of zirconium oxide, which utilizes its wear resistance to improve the wear resistance of the spray gun and protect the nozzle body 201 and nozzle 206. Simultaneously, the thermal insulation layer 205 is coated with a thermal insulation material. By coating the outer protective tube with a certain thickness of thermal insulation material, the outer protective tube can be cooled and insulated.

[0029] The spray gun body 201 is made of 0Cr25Ni20 stainless steel, a standard spray gun tube for existing double-chamber kilns. A replaceable spray gun head of corresponding length is added to the original spray gun body. The newly added replaceable spray gun head, the spray gun body 201, is welded to the spray gun body 100. The spray gun body 201 is also welded to the nozzle 206.

[0030] To sum up, the utility model has the advantages of simple and compact structure and convenient and quick operation. It can weld and fix the replacement spray gun head at the lower end of the burned spray gun body to realize the recycling of the spray gun; the ingenious combination of thermal insulation material and wear-resistant zirconia outer protective tube makes it have excellent high temperature resistance and wear resistance, and is fully suitable for the calcination environment in the double-chamber lime kiln. After replacing the replaceable spray gun head, its service life can be extended while retaining the original spray gun body, thereby reducing the maintenance cost of the double-chamber kiln and improving the equipment utilization efficiency.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A combined spray gun for a double-chamber kiln, characterized by: It includes a spray gun body and a replaceable spray head, the spray head includes a spray head body, a nozzle, an insulation layer and an outer protective tube, the upper end of the spray head body is fixedly connected to the lower end of the spray gun body, the lower end of the spray head body is fixed with a nozzle, the insulation layer is arranged on the outside of the spray head body and the nozzle, the outer protective tube is provided on the outside of the insulation layer, and a locking structure is provided between the spray head body and the outer protective tube.

2. The combined spray gun for a double-chamber kiln according to claim 1, characterized in that: The locking structure includes a locking nut and a locking cone ring. The locking nut is threadedly engaged with the outer wall of the upper end of the nozzle body. The locking cone ring is a conical tube with a larger upper portion and a smaller lower portion. The inner hole at the upper end of the outer protective tube is a trumpet hole with a larger upper portion and a smaller lower portion. The locking cone ring is arranged in a conical ring cavity formed by the locking nut, the nozzle body, and the trumpet hole at the upper end of the outer protective tube; the thermal insulation layer is arranged between the nozzle body and the outer protective tube below the locking cone ring.

3. The combined spray gun for a double-chamber kiln according to claim 2, characterized in that: The upper end of the locking nut is welded and fixed to the connection between the nozzle body.

4. The combined spray gun for a double-chamber kiln according to claim 1, characterized in that: The inner hole at the lower end of the outer protection tube is a trumpet hole that is smaller at the top and larger at the bottom. The nozzle is a conical tube that matches the trumpet hole at the lower end of the outer protection tube. A high-temperature resistant lining layer is provided between the nozzle and the nozzle body.

5. The combined spray gun for a double-chamber kiln according to claim 4, characterized in that: The material of the lining layer is ceramic.

6. The combined spray gun for a double-chamber kiln according to claim 1, characterized in that: The outer protective tube is made of zirconium oxide.

7. The combined spray gun for a double-chamber kiln according to claim 1, characterized in that: The heat insulation layer is formed by coating with heat insulation material.

8. The combined spray gun for a double-chamber kiln according to claim 1, characterized in that: The material of the spray gun body is 0Cr25Ni20 stainless steel.

9. A combined spray gun for a double-chamber kiln according to any one of claims 1 to 8, characterized in that: The nozzle body is fixed to the spray gun body by welding, and the nozzle body is fixed to the spray nozzle by welding.

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