Detachable structure of heat insulation layer of hot air pipeline of spray dryer

Abstract

The utility model relates to spray drier technical field discloses spray drier hot -blast pipeline heat preservation layer detachable structure, including hot -blast pipeline, the outer surface of hot -blast pipeline is provided with heat preservation layer, the outer surface fixed mounting of heat preservation layer has metal protection thin plate, one end fixed mounting of metal protection thin plate has connection sealing board no.

Description

Technical Field

[0001] This application belongs to the technical field of spray dryers, specifically a detachable structure for the insulation layer of the hot air duct of a spray dryer. Background Technology

[0002] A spray dryer is a device that atomizes liquid materials and brings them into contact with high-temperature hot air, causing the moisture to evaporate rapidly and form a powdered product. It is widely used in food, chemical, and pharmaceutical industries. Its core working process relies on a stable supply of high-temperature hot air. The hot air duct, as a key component for conveying high-temperature hot air (usually at 150-300℃), is connected at one end to a heat source device (such as an electric heater, steam heat exchanger, or gas burner), and at the other end to a hot air distributor at the top or side of the drying tower of the spray dryer. It is responsible for evenly delivering the heated clean hot air into the drying tower, ensuring that the atomized material can fully contact the hot air to complete the drying process.

[0003] To reduce internal heat loss, existing hot air ducts often have an insulation layer installed on their outer surface. This insulation layer typically uses a fixed installation structure. The process involves first cutting insulation materials such as rock wool or aluminum silicate wool according to the duct diameter to completely wrap the duct's outer surface. Then, wire and steel strips are used to fix the insulation layer to the duct, with the layers wrapped at intervals to ensure structural stability. However, existing insulation materials lack protection, and installation requires multiple people working together to repeatedly adjust the position and tightness of the insulation material, consuming considerable manpower and time. Furthermore, when the duct needs maintenance or replacement, or when the insulation material needs replacement due to aging, the outer wire and steel strip fasteners must be removed first, and then the insulation material and protective layer must be peeled off layer by layer – a very time-consuming and labor-intensive process. Therefore, we offer a detachable insulation layer structure for spray dryer hot air ducts. Utility Model Content

[0004] The purpose of this application is to provide a detachable structure for the insulation layer of the hot air duct of a spray dryer in order to solve the problems mentioned above.

[0005] The technical solution adopted in this application is as follows: a detachable structure for the insulation layer of a hot air duct in a spray dryer, including a hot air duct, an insulation layer on the outer surface of the hot air duct, a metal protective plate fixedly installed on the outer surface of the insulation layer, a connecting sealing plate one fixedly installed at one end of the metal protective plate, and a connecting sealing plate two fixedly installed at the other end of the metal protective plate, the connecting sealing plate one and the connecting sealing plate two being in contact with each other, a positioning protrusion fixedly installed on the side of the connecting sealing plate one near the connecting sealing plate two, a positioning groove opposite to the positioning protrusion being opened on one side of the connecting sealing plate two, the positioning protrusion being inserted into the interior of the positioning groove, a plurality of threaded holes one being evenly spaced arrayed on one side of the positioning protrusion, a plurality of locking screws corresponding to the positioning protrusion being movably inserted on one side of the connecting sealing plate two, the locking screws being threadedly connected to the interior of the threaded holes one, and a connecting limiting mechanism connected to the metal protective plate being provided on the outer surface of the hot air duct.

[0006] In a preferred embodiment, the connecting limiting mechanism includes a limiting connecting plate, a circular through hole, and a threaded hole II. The limiting connecting plate is fixedly installed on the outer surface of the hot air duct at both ends of the metal protective plate. A plurality of circular through holes are arranged in a circumferential array on one side of the limiting connecting plate. A plurality of threaded holes II corresponding to the circular through holes are respectively opened at the left and right ends of the metal protective plate. A fixing bolt is movably inserted inside the circular through hole, and one end of the fixing bolt is threaded into the inside of the threaded hole II.

[0007] In a preferred embodiment, flange connecting plates are fixedly installed on the outer surfaces of the left and right ends of the hot air duct.

[0008] In a preferred embodiment, a sealing gasket is provided on the side of the limiting connecting plate near the metal protective sheet.

[0009] In a preferred embodiment, the positioning protrusion has an arc-shaped transition surface at one end corner near the connecting sealing plate.

[0010] In summary, due to the adoption of the above technical solution, the beneficial effects of this application are:

[0011] 1. In this application, due to the adoption of the above-mentioned solution, the device can effectively block heat in the pipeline by setting three layers of insulation layers that are bonded to each other and bonded to the metal protective plate. At the same time, the metal protective plate can effectively protect the insulation layer and improve its service life. When it is necessary to inspect the pipeline or replace the insulation layer, the metal protective plate and insulation layer can be removed simply by unscrewing the locking screw and fixing bolt. The operation is convenient, reduces labor and time costs, and avoids damage to the pipeline and insulation material. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this application;

[0013] Figure 2 This is a schematic cross-sectional view of the insulation layer in this application;

[0014] Figure 3 This is a schematic diagram of the metal protective sheet structure of this application;

[0015] Figure 4 This is a schematic diagram of the limiting connection disk structure of this application.

[0016] The markings in the diagram are: 1. Hot air duct; 2. Insulation layer; 3. Metal protective sheet; 4. Connecting sealing plate one; 5. Connecting sealing plate two; 6. Positioning protrusion; 7. Positioning groove; 8. Threaded hole one; 9. Locking screw; 10. Connecting limiting mechanism; 101. Limiting connecting plate; 102. Circular through hole; 103. Threaded hole two; 11. Flange connecting plate; 12. Sealing gasket. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] refer to Figures 1-4 As shown, the hot air duct insulation layer of the spray dryer has a detachable structure, including a hot air duct 1. Flange connection plates 11 are fixedly installed on the outer surfaces of the left and right ends of the hot air duct 1. Through the flange connection plates 11, it is convenient for one end of the hot air duct 1 to be connected to the hot air distributor on the spray dryer, and the other end to be connected to other components (such as heat source equipment or drying tower). This can ensure the sealing and stability of the hot air delivery. At the same time, the standardized structure of the flange connection plates 11 is also conducive to disassembly, maintenance and replacement in the later stage.

[0019] refer to Figures 1-4As shown, the outer surface of the hot air duct 1 is provided with an insulation layer 2, and a metal protective sheet 3 is fixedly installed on the outer surface of the insulation layer 2. The metal protective sheet 3 can be made of aluminum foil or stainless steel sheet. The insulation layer 2 has three layers: an inner ceramic fiber blanket, a middle high-density rock wool board, and an outer aluminum silicate needled blanket, from the inside out. The three layers are bonded together to form a whole with a high-temperature resistant adhesive. The outer layer of the insulation layer 2 (aluminum silicate needled blanket) is also bonded to the inner surface of the metal protective sheet 3 with a high-temperature resistant adhesive. The tight bonding and the three-layer insulation structure fully leverage the advantages of different materials. The ceramic fiber blanket has excellent high-temperature resistance and can directly contact the surface of the hot air duct 1 to reduce heat conduction. The high-density rock wool board has good thermal insulation effect and can further block heat loss. The aluminum silicate needled blanket has both flexibility and thermal insulation properties. The bonding with the metal protective sheet 3 ensures the overall stability of the insulation layer 2 and avoids delamination or displacement, which greatly improves the insulation efficiency. At the same time, the multi-layer structure design also extends the service life of the insulation layer.

[0020] refer to Figures 1-4 As shown, a connecting sealing plate 1 4 is fixedly installed at one end of the metal protective thin plate 3, and a connecting sealing plate 2 5 is fixedly installed at the other end of the metal protective thin plate 3. The connecting sealing plate 1 4 and the connecting sealing plate 2 5 are in contact with each other. A positioning protrusion 6 is fixedly installed on the side of the connecting sealing plate 1 4 near the connecting sealing plate 2 5. A positioning groove 7 opposite to the positioning protrusion 6 is provided on one side of the connecting sealing plate 2 5. An arc-shaped transition surface is provided at the corner of the end of the positioning protrusion 6 near the connecting sealing plate 1 4. The positioning protrusion 6 is inserted into the interior of the positioning groove 7. Through the contact between the connecting sealing plate 1 4 and the connecting sealing plate 2 5, and the insertion structure of the positioning protrusion 6 and the positioning groove 7, the circumferential closed positioning of the metal protective thin plate 3 can be quickly achieved. The arc-shaped transition surface facilitates the smooth insertion of the positioning protrusion 6 into the positioning groove 7, reducing jamming during installation, and also enhancing the sealing of the connection part to prevent heat leakage from the gaps.

[0021] refer to Figures 1-4 As shown, a plurality of threaded holes 8 are evenly spaced on one side of the positioning protrusion 6, and a plurality of locking screws 9 corresponding to the positioning protrusion 6 are movably inserted on one side of the connecting sealing plate 2 5. The locking screws 9 are threaded into the inside of the threaded holes 8. A connecting limiting mechanism 10 connected to the metal protective plate 3 is provided on the outer surface of the hot air duct 1. By connecting the locking screws 9 to the threaded holes 8, the connecting sealing plate 4 and the connecting sealing plate 2 5 can be firmly fixed, ensuring the tightness of the metal protective plate 3 in wrapping the insulation layer 2 and preventing the connection from loosening due to vibration and other factors. The even distribution of the multiple locking screws makes the force more balanced, further improving the stability of the structure. The connecting limiting mechanism 10 provides additional fixation and limitation for the metal protective plate 3, preventing its axial displacement.

[0022] refer to Figures 1-4 As shown, the connecting and limiting mechanism 10 includes a limiting connecting plate 101, a circular through hole 102, and a threaded hole 103. The limiting connecting plate 101 is fixedly installed on the outer surface of the hot air duct 1 at both ends of the metal protective plate 3. A sealing gasket 12 is provided on the side of the limiting connecting plate 101 near the metal protective plate 3. Multiple circular through holes 102 are arranged in a circumferential array on one side of the limiting connecting plate 101. Multiple threaded holes 103 corresponding to the circular through holes 102 are respectively provided on the left and right ends of the metal protective plate 3. The internal movement of the circular through holes 102 is movable. A fixing bolt is provided, with one end of the fixing bolt threaded into the inside of the threaded hole 103. The metal protective plate 3 is directly fixed to the setting limiting connecting plate 101 by the fixing bolt, which can effectively limit the left and right ends of the metal protective plate 3 and prevent it from sliding axially on the hot air duct 1. The setting sealing gasket 12 can enhance the sealing between the limiting connecting plate 101 and the metal protective plate 3, reduce heat loss from the end gaps, and this bolt connection method is also easy to disassemble, which provides convenience for later maintenance and insulation layer replacement.

[0023] The implementation principle of the detachable insulation layer structure of the hot air duct of the spray dryer in this application is as follows: The device effectively isolates heat inside the duct by setting three layers of insulation layer 2 that are bonded to each other and to the metal protective plate 3 outside the hot air duct 1. At the same time, the metal protective plate 3 forms a tight wrap around the insulation layer 2 by the positioning and insertion of the connecting sealing plate 1 4 and the connecting sealing plate 2 5 and the fixing of the locking screw 9. Then, the connecting limiting mechanism 10 can further fix the position of the metal protective plate 3 to ensure the overall structure is stable. When it is necessary to repair the duct or replace the insulation layer, the metal protective plate 3 and the insulation layer 2 can be removed simply by unscrewing the locking screw 9 and the fixing bolt. The operation is convenient, greatly reducing manpower and time costs, and avoiding damage to the duct and insulation material, thus ensuring the long-term stable operation of the equipment.

[0024] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A detachable insulation layer structure for the hot air duct of a spray dryer, comprising a hot air duct (1), characterized in that: The outer surface of the hot air duct (1) is provided with an insulation layer (2), and a metal protective plate (3) is fixedly installed on the outer surface of the insulation layer (2). A connecting sealing plate (4) is fixedly installed at one end of the metal protective plate (3), and a connecting sealing plate (5) is fixedly installed at the other end of the metal protective plate (3). The connecting sealing plate (4) and the connecting sealing plate (5) are in contact. A positioning protrusion (6) is fixedly installed on the side of the connecting sealing plate (4) near the connecting sealing plate (5). A positioning groove (7) is provided on one side, which is opposite to the positioning protrusion (6). The positioning protrusion (6) is inserted into the positioning groove (7). A plurality of threaded holes (8) are arranged in an evenly spaced array on one side of the positioning protrusion (6). A plurality of locking screws (9) corresponding to the positioning protrusion (6) are movably inserted on one side of the connecting sealing plate (5). The locking screws (9) are threaded into the threaded holes (8). A connecting limiting mechanism (10) connected to the metal protective plate (3) is provided on the outer surface of the hot air duct (1).

2. The detachable insulation layer structure of the hot air duct of the spray dryer as described in claim 1, characterized in that: The connecting limiting mechanism (10) includes a limiting connecting plate (101), a circular through hole (102), and a threaded hole (103). The outer surface of the hot air duct (1) is fixedly installed on the left and right ends of the metal protective plate (3). A plurality of circular through holes (102) are arranged in a circumferential array on one side of the limiting connecting plate (101). A plurality of threaded holes (103) corresponding to the circular through holes (102) are respectively opened on the left and right ends of the metal protective plate (3). A fixing bolt is movably inserted inside the circular through hole (102), and one end of the fixing bolt is threadedly connected to the inside of the threaded hole (103).

3. The detachable insulation layer structure of the hot air duct of the spray dryer as described in claim 1, characterized in that: Flange connecting plates (11) are fixedly installed on the outer surfaces of the left and right ends of the hot air duct (1).

4. The detachable insulation layer structure of the hot air duct of the spray dryer as described in claim 2, characterized in that: A sealing gasket (12) is provided on the side of the limiting connecting plate (101) near the metal protective plate (3).

5. The detachable insulation layer structure of the hot air duct of the spray dryer as described in claim 1, characterized in that: The positioning protrusion (6) has an arc-shaped transition surface at one end corner near the connecting sealing plate (4).

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