A process for machining a drying tower cylinder of a spray dryer

Abstract

The present application relates to a kind of spray dryer drying tower cylinder processing technology, comprising the following steps: multiple inner wall plates are sequentially spliced and welded to form a section of cylindrical inner wall;After each section of cylindrical inner wall is welded into cylindrical, welding flange is set in the section of cylindrical inner wall bottom, and the inner wall of drying tower cylinder is formed by splicing and welding multiple sections of cylindrical inner wall and several flanges, and the flange has through hole;Cold air jacket plate is welded with flange outer edge as reference, and multiple cold air jacket plates are sequentially spliced and welded to form a section of cylindrical jacket, and cold air jacket of drying tower is formed by splicing and welding multiple sections of cylindrical jacket.The thickness of the flange is thickened in the present application, and laser cutting is used, so that the size is accurate and the error is small during cutting, the flange with high circular precision is used as reference to make the inner wall of cylinder and cold air jacket round, and the drying tower is closer to cylindrical shape, with higher precision.

Description

Technical Field

[0001] This invention relates to the field of spray dryer technology, and in particular to a processing technology for the drying tower body of a spray dryer. Background Technology

[0002] A spray dryer mainly consists of a spray drying tower, an atomizer, a cyclone separator, heating equipment, and air filtration equipment. Its working principle is to use the atomizer to atomize the liquid material into tiny droplets. These droplets then rapidly evaporate the water or other solvents in the liquid material through direct contact with hot air or other heat media within the drying tower. The liquid material is dried into a powdery product in a very short time and then discharged from the drying tower to the cyclone separator, achieving gas-solid separation to obtain the dried product. The spray drying tower's cylinder is designed with multiple layers, including a cold air jacket and insulation layer, depending on requirements. Due to the large size of the cylinder, it is difficult to ensure the accuracy of the upper and lower diameters during manufacturing. Current manufacturing processes use channel steel, cutting several notches into a single section, manually hammering it into a ring, and then splicing it together. This method produces a rough, low-precision channel steel ring with large errors. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to overcome the above-mentioned technical problems, the present invention provides a processing technology for the drying tower body of a spray dryer.

[0004] The technical solution adopted by this invention to solve its technical problem is: a processing technology for the drying tower body of a spray dryer, comprising the following steps:

[0005] Step 1: Weld the inner wall of the drying tower body in sections from top to bottom: Weld multiple inner wall plates in sequence to form a cylindrical inner wall section; After each cylindrical inner wall section is welded into a cylindrical shape, a welding flange is fitted at the bottom of the cylindrical inner wall section. Multiple cylindrical inner wall sections and several flanges are spliced ​​together to form the inner wall of the drying tower body. The flanges have through holes.

[0006] Step 2: Weld the cold air jacket in sections from top to bottom: Weld the cold air jacket plate with the outer edge of the flange as the reference. Multiple cold air jacket plates are spliced ​​and welded in sequence to form a cylindrical jacket. The upper and lower cylindrical jackets are spliced ​​together to form the cold air jacket of the drying tower.

[0007] Step 3: Weld load-bearing rings to the inner wall of the welded drying tower and the bottom of the cold air jacket.

[0008] In step 2, after the cold air jacket is assembled, several insulation flanges distributed along the axial direction of the cold air jacket are installed on the outside of the cold air jacket. An insulation layer is then wrapped around the outside of the cold air jacket with the insulation flanges as a reference, and an outer wrapping layer is wrapped around the insulation layer.

[0009] The flanges are laser-cut, and all flanges have the same outer diameter.

[0010] The thickness of the flange is 10cm ± 5cm.

[0011] Flanges are evenly distributed axially along the inner wall of the drying tower, with a spacing of 85cm ± 10cm between adjacent flanges. The spacing between two flanges should not be too large, as this will reduce the accuracy of the tower's circular shape and its strength.

[0012] In step 3, an upper flange is welded to the bottom of the cold air jacket of the drying tower, and a lower flange is welded to the bottom of the inner wall of the drying tower. The outer diameters of the upper and lower flanges are the same, and the inner rings of both the upper and lower flanges abut against the outer surface of the inner wall of the drying tower. The two ends of the load-bearing ring are welded to the lower surface of the upper flange and the upper surface of the lower flange, respectively. The outer surface of the load-bearing ring is flush with the outer surfaces of the upper and lower flanges, so as to achieve coaxiality between the load-bearing ring, the inner wall of the tower, and the jacket. Both the upper and lower flanges have vent holes, and the vent hole of the upper flange is located between the inner wall of the drying tower and the cold air jacket.

[0013] In step 3, mounting feet are welded to the outside of the load-bearing ring. These mounting feet, also known as lugs, serve a supporting function.

[0014] Before step 1, the top cover is fabricated first. The top cover has lifting holes. The volute is welded to the top of the top cover, and then the top cover with the welded volute is lifted through the lifting holes. The cylinder is then welded below the top cover. The volute is the air inlet volute, which guides the air intake.

[0015] Four lifting holes are evenly distributed on the top cover.

[0016] After step 3, the cone-shaped part at the bottom of the drying tower body is welded after the drying tower body is formed.

[0017] The beneficial effects of this invention are that the drying tower body processing technology of the spray dryer of this invention has increased the thickness of the flange and adopted laser cutting, which does not deform during cutting, has high dimensional accuracy and small error, and uses a high-precision circular flange as a reference to make the inner wall of the cylinder and the cold air jacket round, making the drying tower closer to a cylindrical shape and with higher precision. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the drying tower body of the spray dryer of the present invention.

[0020] Figure 2 yes Figure 1 Enlarged view of part A in the image.

[0021] Figure 3 This is a schematic diagram of the preliminary process for processing the drying tower body of the spray dryer of the present invention.

[0022] Figure 4 This is a schematic diagram of the process for machining the drying tower body and cone of the spray dryer of the present invention.

[0023] In the diagram: 1. Inner wall of the cylinder; 1-1. Cylindrical inner wall; 2. Flange; 2-1. Through hole; 3. Cold air jacket; 3-1. Cylindrical jacket; 4. Load-bearing ring; 5. Upper flange; 6. Lower flange; 7. Vent hole; 8. Mounting foot; 9. Top cover; 10. Volute; 11. Conical section; 11-1. Conical section cold air jacket; 11-2. Air inlet hole; 12. Insulation layer; 13. Outer cladding layer; 14. Top annular cold air jacket; 15. Insulation flange ring. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0025] like Figure 1 , 2 As shown, the drying tower body includes an inner wall 1, a flange 2, a cold air jacket 3, and a load-bearing ring 4. The top of the drying tower body has a top cover 9 and a volute 10, and the bottom of the drying tower body is connected to a conical section 11. Some drying tower bodies are also covered with an insulation layer 12, and the insulation layer 12 is wrapped with an outer cladding layer 13. Figure 1 , 2 The middle arrow indicates the airflow direction. The cold air is drawn from the air inlet 11-2 of the lower flange of the cone section 11 into the cone section cold air jacket 11-1 of the cone section 11 through the external exhaust fan of the top annular cold air jacket 14 at the edge of the top cover 9. Then, it enters the space between the load-bearing ring 4 and the inner wall 1 of the cylinder through the vent 7 of the lower flange 6. Finally, it enters the cold air jacket 3 of the cylinder through the vent 7 of the upper flange 5 and is then extracted from the top annular cold air jacket 14.

[0026] The present invention provides a processing technology for the drying tower body of a spray dryer, such as... Figure 3-4 As shown, it includes the following steps:

[0027] Step 1: As Figure 3 As shown, first, the top cover 9 is manufactured, which has lifting holes. The volute 10 is welded to the top of the top cover 9. Then, the top cover 9 with the welded volute 10 is lifted through the lifting holes, and the cylinder is welded below the top cover 9. Generally, four lifting holes can be used for lifting, and four lifting holes are evenly arranged on the top cover 9.

[0028] The following steps are as follows Figure 4 As shown:

[0029] Step 2: Weld the inner wall of the drying tower in sections from top to bottom: Weld multiple inner wall plates in sequence to form a cylindrical inner wall 1-1; After each cylindrical inner wall 1-1 is welded into a cylindrical shape, a welding flange 2 is fitted at the bottom of the cylindrical inner wall 1-1. Multiple cylindrical inner wall sections 1-1 and several flanges 2 are spliced ​​together to form the inner wall of the drying tower. The flanges 2 have through holes 2-1.

[0030] Flange 2 is laser-cut, and all flanges 2 have the same outer diameter. The thickness of flange 2 is 10cm±5cm. The increased thickness of flange 2, coupled with laser cutting, ensures no deformation during cutting, high dimensional accuracy, and minimal error. Using flange 2, which has high circular precision, as a reference, the inner wall 1 of the cylinder and the cold air jacket 3 are made round, making the drying tower closer to a cylindrical shape and achieving even higher precision.

[0031] Flanges 2 are evenly distributed along the axial direction of the inner wall 1 of the drying tower, with a spacing of 85cm ± 10cm between adjacent flanges 2. The spacing between two flanges 2 should not be too large, as this would reduce the accuracy of the tower's circular shape and the tower's strength.

[0032] Step 3: Weld the cold air jacket 3 from top to bottom in sections: Weld the cold air jacket plate with the outer edge of flange 2 as the reference. Multiple cold air jacket plates are spliced ​​and welded in sequence to form a cylindrical jacket 3-1. The upper and lower cylindrical jackets 3-1 are spliced ​​together to form the cold air jacket 3 of the drying tower.

[0033] After the cold air jacket 3 is assembled, several insulation flange rings 15 distributed along the axial direction of the cold air jacket 3 are installed on the outside of the cold air jacket 3. An insulation layer 12 is wrapped around the outside of the cold air jacket 3 with the insulation flange rings 15 as the reference. An outer layer 13 is wrapped around the insulation layer 12.

[0034] Step 4: Weld the load-bearing ring 4 to the bottom of the inner wall 1 and the cold air jacket 3 of the welded drying tower.

[0035] An upper flange 5 is welded to the bottom of the cold air jacket 3 of the drying tower, and a lower flange 6 is welded to the bottom of the inner wall 1 of the drying tower cylinder. The outer diameters of the upper flange 5 and the lower flange 6 are the same, and the inner rings of the upper flange 5 and the lower flange 6 abut against the outer surface of the inner wall 1 of the drying tower cylinder. The two ends of the load-bearing ring 4 are welded to the lower surface of the upper flange 5 and the upper surface of the lower flange 6, respectively. The outer surface of the load-bearing ring 4 is flush with the outer surfaces of the upper flange 5 and the lower flange 6, so as to achieve coaxiality between the load-bearing ring 4, the inner wall 1 of the cylinder, and the jacket. Both the upper flange 5 and the lower flange 6 have vent holes 7. The vent holes 7 of the upper flange 5 are located between the inner wall 1 of the drying tower cylinder and the cold air jacket 3.

[0036] Then weld the mounting feet 8 to the outside of the load-bearing ring 4.

[0037] Step 5: After the drying tower body is processed and shaped, weld the cone part 11 at the bottom of the drying tower body.

[0038] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A processing technology for the drying tower body of a spray dryer, characterized in that, Includes the following steps: Step 1: Weld the inner wall of the drying tower in sections from top to bottom (1): Weld multiple inner wall plates in sequence to form a cylindrical inner wall (1-1); After each cylindrical inner wall (1-1) is welded into a cylindrical shape, a welding flange (2) is fitted at the bottom of the cylindrical inner wall (1-1). Multiple cylindrical inner wall sections (1-1) and several flanges (2) are spliced ​​together to form the inner wall of the drying tower (1). The flanges (2) have through holes (2-1). Step 2: Weld the cold air jacket (3) from top to bottom in sections: Weld the cold air jacket plate with the outer edge of the flange (2) as the reference. Multiple cold air jacket plates are spliced ​​and welded in sequence to form a cylindrical jacket (3-1). Multiple cylindrical jackets (3-1) are spliced ​​together to form the cold air jacket (3) of the drying tower. Step 3: Weld a load-bearing ring (4) to the bottom of the inner wall (1) and cold air jacket (3) of the welded drying tower.

2. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, In step 2, after the cold air jacket (3) is assembled, several insulation flange rings (15) distributed along the axial direction of the cold air jacket (3) are installed on the outside of the cold air jacket (3). The insulation layer (12) is wrapped around the outside of the cold air jacket (3) with the insulation flange rings (15) as the reference. The insulation layer (12) is wrapped with an outer layer (13).

3. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, The flanges (2) are laser-cut, and all flanges (2) have the same outer diameter.

4. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, The thickness of the flange (2) is 10cm ± 5cm.

5. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, Flanges (2) are evenly distributed along the inner wall (1) of the drying tower, with a spacing of 85cm ± 10cm between two adjacent flanges (2).

6. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, In step 3, an upper flange (5) is welded to the bottom of the cold air jacket (3) of the drying tower, and a lower flange (6) is welded to the bottom of the inner wall (1) of the drying tower. The outer diameters of the upper flange (5) and the lower flange (6) are the same, and the inner rings of the upper flange (5) and the lower flange (6) are both against the outer surface of the inner wall (1) of the drying tower. The two ends of the load-bearing ring (4) are welded to the lower surface of the upper flange (5) and the upper surface of the lower flange (6) respectively. The outer surface of the load-bearing ring (4) is flush with the outer surface of the upper flange (5) and the outer surface of the lower flange (6). Both the upper flange (5) and the lower flange (6) have ventilation holes (7). The ventilation holes (7) of the upper flange (5) are located between the inner wall (1) of the drying tower and the cold air jacket (3).

7. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, In step 3, the mounting feet (8) are welded to the outside of the load-bearing ring (4).

8. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, Before step 1, make the top cover (9). The top cover (9) has a lifting hole. Weld the volute (10) to the top cover (9). Then lift the top cover (9) with the volute (10) welded on through the lifting hole. Weld the cylinder below the top cover (9).

9. The processing technology of the drying tower body of the spray dryer as described in claim 8, characterized in that, Four lifting holes are evenly arranged on the top cover (9).

10. The processing technology of the drying tower body of the spray dryer as described in claim 1, characterized in that, After step 3, the cone-shaped part (11) below the drying tower body is welded after the drying tower body is formed.

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