Water cooling structure, outlet connecting flue, melting furnace and melting furnace cooling system

Abstract

The utility model relates to the technical field of environmental protection cooling equipment, specifically disclose a water cooling structure, outlet connection flue, melting furnace and melting furnace cooling system, this water cooling structure includes cylinder and half pipe, the half pipe with the cylinder outer wall connection becomes flow channel, reduces welding and machine adds workload, reduces the steel consumption, has saved the equipment cost, improved work efficiency. Half pipe outside thermal insulation layer, after cooling water enters melting furnace and outlet connection flue heat exchange, enters subsequent waste heat boiler, as the part of waste heat boiler feedwater is used to produce steam, this has cooled the internal refractory material, has recovered this part of heat.

Description

Technical Field

[0001] This utility model relates to the field of environmentally friendly cooling equipment technology, and more specifically to a water-cooled structure, an outlet connecting flue, a melting furnace, and a melting furnace cooling system. Background Technology

[0002] The internal operating temperature of the melting furnace is typically between 1200℃ and 1600℃, while the exhaust gas temperature is usually between 1100℃ and 1200℃. Refractory materials are easily damaged at high temperatures due to corrosion from the glassy or molten alloy and thermal shock. Currently, water-cooled jackets are mainly used to cool the refractory materials of the melting furnace and the outlet flue. The water-cooled jacket of the melting furnace and outlet flue consists of a steel cylinder with a narrow flow channel formed by welding steel baffles. The outer cylinder of the jacket is formed by stamping and extending the baffles, and then welding it to adjacent baffles. This welding and machining process is extensive, and the flow channel plates and outer plates are relatively thick, resulting in steel waste and increased equipment costs. The low operating pressure of the medium also affects cooling efficiency. With this flow channel formation method, if one baffle is damaged, it may affect the normal operation of two flow channels.

[0003] Therefore, there is an urgent need to design a new water-cooling structure to solve the above problems. Utility Model Content

[0004] 1. Technical problem to be solved by the utility model

[0005] In view of this, the purpose of this utility model is to provide a water-cooled structure, an outlet connecting flue, a melting furnace, and a melting furnace cooling system, so as to at least solve one of the above problems.

[0006] 2. Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] This utility model discloses a water-cooled structure for use in a melting furnace and / or outlet connection flue. The water-cooled structure includes a cylinder and several half-pipes. The several half-pipes are connected to the outer wall of the cylinder to form a flow channel, and the outer periphery of the half-pipes is wrapped with heat-insulating material.

[0009] Furthermore, gaps are left between the half-tubes, and the gaps are filled with thermal insulation material.

[0010] Furthermore, the cross-section of the cylinder is circular, and the cylinder is rolled from a 12-18mm thick steel plate.

[0011] Furthermore, the cross-section of the semi-tube is arc-shaped.

[0012] Furthermore, the wall thickness of the semi-tube is 6-8 mm, and the diameter is 110-118 mm.

[0013] Furthermore, the semi-tube is welded to the outer wall of the cylinder.

[0014] The second aspect of this utility model also relates to an outlet connecting flue, including the above-mentioned water-cooled structure, wherein the inner wall of the cylinder is wrapped with refractory material.

[0015] The third aspect of this utility model also relates to a melting furnace, including the above-mentioned water-cooled structure, wherein the inner wall of the cylinder is wrapped with refractory material.

[0016] The fourth aspect of this utility model also relates to a melting furnace cooling system, including the aforementioned melting furnace and an outlet connecting flue. The cooling system further includes a tail gas combustion chamber connected to the outlet connecting flue, and a waste heat boiler connected to the tail gas combustion chamber.

[0017] Furthermore, an expansion joint is provided on the outlet connecting flue between the melting furnace and the exhaust gas incineration chamber.

[0018] 3. Beneficial effects

[0019] (1) The water-cooled structure of this utility model is used for a melting furnace and / or outlet connecting flue. The water-cooled structure includes a cylinder and a half-pipe. The half-pipe is connected to the outer wall of the cylinder to form a flow channel, which reduces the amount of welding and machining work, reduces steel consumption, saves equipment costs, and improves work efficiency. The half-pipe is provided with an insulation layer. After the cooling water enters the melting furnace and outlet connecting flue for heat exchange, it enters the subsequent waste heat boiler and is used as part of the waste heat boiler feedwater to generate steam. This cools the internal refractory material and recovers this part of the heat.

[0020] (2) In the water-cooled structure of this utility model, there is a gap between the half-pipes, and the gap is filled with heat-insulating material. The gap between the half-pipes means that the flow channels are independent of each other. When subjected to external impact, the half-pipes are not affected by each other. The half-pipes are directly welded to the cylinder. The half-pipes have strong impact resistance and are not easily damaged.

[0021] (3) The melting furnace and / or outlet connecting flue of this utility model includes the above-mentioned water cooling structure. The cylinder is wrapped with refractory material, which can reduce the amount of welding and machining work while cooling the refractory material, saving costs and improving efficiency.

[0022] (4) The molten furnace cooling system of this utility model includes the above-mentioned molten furnace and the above-mentioned outlet connecting flue. The cooling system also includes a tail gas incineration chamber and a waste heat boiler. The cooling medium absorbs heat and does not release it into the atmosphere. It is used as part of the feed water of the subsequent waste heat boiler to generate steam, fill the steam used in production, and recover this part of the heat, which is energy-saving and environmentally friendly.

[0023] In addition to the purposes, features, and effects described above, this utility model has other purposes, features, and effects. The present utility model will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of a water-cooled jacket structure in the prior art;

[0025] Figure 2 yes Figure 1 Enlarged view of section I;

[0026] Figure 3 This is a schematic diagram of a water-cooling structure according to an embodiment of the present invention;

[0027] Figure 4 yes Figure 3 Enlarged view of section II;

[0028] Figure 5 This is a schematic diagram of the overall structure of a melting furnace cooling system according to an embodiment of the present invention.

[0029] The following are the labels in the schematic diagram: 1. Melting furnace, 2. Outlet connecting flue, 3. Tail gas combustion chamber, 4. Waste heat boiler, 5. Expansion joint, 6. Jacket inner cylinder, 7. Baffle plate, 8. Jacket outer cylinder, 9. Flow channel, 10. Refractory material, 11. Cylinder body, 12. Half pipe, 13. Thermal insulation material. Detailed Implementation

[0030] To enable those skilled in the art to better understand this technical solution, the technical solution of this utility model will be clearly and completely described below in conjunction with the accompanying drawings and embodiments.

[0031] The structures, proportions, and sizes illustrated in the accompanying drawings are merely for illustrative purposes and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the disclosed technical content. Terms such as "inner" and "outer," "exit" and "inlet," and "large" and "small" used in this specification are merely for clarity and are not intended to limit the scope of implementation. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0032] refer to Figure 1 , Figure 2As shown, currently, the cooling of refractory materials in the melting furnace and outlet connecting flue is usually achieved using a cold water jacket. The existing cold water jacket includes an inner jacket cylinder 6, baffles 7, an outer jacket cylinder 8 formed by stamping and extending from the baffles 7, and a flow channel 9 welded to the adjacent baffles 7. The inner jacket cylinder 6 is made of 15mm thick steel plate, with a 68mm wide flow channel welded from 12mm thick steel baffles in the middle. The circulating cooling water pressure is only 0.45 MPa. The inventors discovered that in the above cooling structure, one flow channel requires three welds, resulting in a large amount of welding and machining work, low medium working pressure, and excessively thick flow channel vertical plates and outer plates, leading to steel waste and increased equipment costs. Furthermore, the heat absorbed by the circulating cooling water is dissipated into the atmosphere, resulting in heat loss as this portion of heat is not recovered.

[0033] Based on the above, the basic idea of ​​this utility model is to provide a new way of constructing flow channels, which helps to reduce welding and machining workload, reduce steel consumption, recover and reuse excess heat, save equipment costs, and improve work efficiency.

[0034] refer to Figure 3 , Figure 4 As shown in the figure, a water-cooled structure of this utility model is used for a melting furnace and / or an outlet connecting flue. The water-cooled structure includes a cylinder 11 and a plurality of half-pipes 12. The plurality of half-pipes 12 are connected to the outer wall of the cylinder 11 to form a flow channel 9. The outer periphery of the half-pipes 12 is wrapped with heat-insulating material 13.

[0035] This water-cooled structure can be used for both the melting furnace 1 and the outlet connecting flue 2, except that the cross-sectional area of ​​the melting furnace is much larger than that of the outlet connecting flue; the basic structure is the same. Using a half-pipe 12 instead of the water-cooled jacket of the melting furnace and outlet connecting flue in the existing technology helps reduce welding and machining workload, greatly improving work efficiency. The half-pipe is equipped with an external insulation layer. After the cooling water enters the melting furnace and outlet connecting flue for heat exchange, it enters the subsequent waste heat boiler, serving as part of the waste heat boiler feedwater to generate steam. This both cools the internal refractory material and recovers this portion of heat.

[0036] In some embodiments, gaps are left between the half-pipes 12, and the gaps are filled with thermal insulation material 13. The gaps between the half-pipes allow the flow channels to be independent of each other, so that the half-pipes are not affected by external impacts. The half-pipes are directly welded to the cylinder, resulting in strong impact resistance and making them less prone to damage.

[0037] The cross-section of the cylinder 11 is circular, i.e., the cylinder is cylindrical. Of course, other shapes, such as elliptical or even square, can be used depending on the actual working scenario. The cylinder 11 is made of 12-18mm thick steel plate, preferably 15mm thick steel plate.

[0038] The cross-section of the semi-tube 12 is arc-shaped. For example, it can be semi-circular, semi-elliptical, large semi-circular, small semi-circular, or large semi-elliptical, small semi-elliptical, etc.

[0039] In some embodiments, the wall thickness of the semi-tube 12 is 6-8 mm, preferably 7 mm; the diameter is 110-118 mm, preferably 114 mm.

[0040] The half-pipe 12 is welded to the outer wall of the cylinder 11, or other fixed connection methods can be adopted according to the actual situation.

[0041] The second aspect of this utility model also relates to a melting furnace and / or an outlet connecting flue, including the water-cooled structure described above, wherein the inner wall of the cylinder 11 is wrapped with refractory material 10, and the specific specifications and models of the refractory material are not limited here.

[0042] refer to Figure 5 As shown, the third aspect of this utility model also relates to a melting furnace cooling system, including the aforementioned melting furnace 1 and an outlet connecting flue 2. The cooling system also includes a tail gas incineration chamber 3 connected to the outlet connecting flue, and a waste heat boiler 4 connected to the tail gas incineration chamber 3. The cooling medium absorbs heat but does not release it into the atmosphere. Instead, it serves as part of the feedwater for the subsequent waste heat boiler to generate steam, fill the steam supply for production, and recover this portion of heat, thus saving energy and protecting the environment.

[0043] The molten furnace is connected to the flue through the outlet, and the exhaust gas is fed into the exhaust gas combustion chamber for combustion to remove harmful substances. The waste heat boiler then recovers the heat from the combustion to generate steam for production.

[0044] An expansion joint 5 is installed on the outlet connecting flue 2 between the melting furnace 1 and the tail gas incineration chamber 3 to compensate for dimensional changes and stresses caused by factors such as temperature changes and mechanical vibrations in the pipeline or container, thereby ensuring the stable operation of the system.

[0045] The present invention and its embodiments have been described above illustratively. This description is not restrictive, and the figures shown are only one embodiment of the present invention; the actual structure is not limited thereto. If any person skilled in the art, inspired by this description, designs a similar structure to the present invention without departing from its inventive spirit, such design shall fall within the protection scope of the present invention.

Claims

1. A water-cooled structure for use in a melting furnace and / or for connecting to an outlet flue, characterized in that, The water-cooled structure includes a cylinder (11) and several half-pipes (12). The several half-pipes (12) are connected to the outer wall of the cylinder (11) to form a flow channel (9). The outer periphery of the half-pipes (12) is wrapped with thermal insulation material (13).

2. The water-cooling structure according to claim 1, characterized in that, There is a gap between the half-pipes (12), and the gap is filled with thermal insulation material (13).

3. The water-cooled structure according to claim 2, characterized in that, The cross-section of the cylinder (11) is circular, and the cylinder (11) is made of 12-18mm thick steel plate.

4. The water-cooled structure according to claim 3, characterized in that, The cross-section of the half-tube (12) is arc-shaped.

5. The water-cooled structure according to claim 4, characterized in that, The half-tube (12) has a wall thickness of 6-8 mm and a diameter of 110-118 mm.

6. The water-cooled structure according to claim 5, characterized in that, The half-pipe (12) is welded to the outer wall of the cylinder (11).

7. An outlet connecting flue, characterized in that, The water-cooled structure includes any one of claims 1 to 6, wherein the inner wall of the cylinder (11) is wrapped with refractory material (10).

8. A melting furnace, characterized in that, The water-cooled structure includes any one of claims 1 to 6, wherein the inner wall of the cylinder (11) is wrapped with refractory material (10).

9. A cooling system for a melting furnace, characterized in that, The cooling system includes the outlet connecting flue (2) as described in claim 7 and the melting furnace (1) as described in claim 8. It also includes a tail gas incineration chamber (3) connected to the outlet connecting flue and a waste heat boiler (4) connected to the tail gas incineration chamber (3).

10. The furnace cooling system according to claim 9, characterized in that, An expansion joint (5) is provided on the outlet connecting flue (2) between the melting furnace (1) and the tail gas incineration chamber (3).

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