Intermediate silo mechanism with vibrating screen

Abstract

The present invention belongs to the field of PTA devices, and discloses an intermediate silo mechanism with a vibrating screen. In order to reduce the wall blocks entering the pulping tank, it is designed to add a vibrating screen to each of the cones of the two intermediate silos, and the vibrating screen discharges the material to the discharge screw, and then passes through the screw and the rotary valve to the pulping tank to intercept the blocks in the intermediate silo discharge. At the same time, the original cone discharge rotary valve is moved to the side discharge, and an inner extension pipe is added to the side to reduce the block from entering the rotary valve from the side, so that the block is allowed to enter the vibrating screen from the cone as much as possible to intercept the block. A soft connection is respectively set at the feed port and the discharge port of the vibrating screen to protect the pipeline and equipment from shaking. After the transformation, the number of times the equipment is dismantled and cleaned is reduced, the stable operation cycle is extended, the feed fluctuation is reduced, the product index is stabilized, and the steam consumption is reduced. The on-site workload is reduced, the safety technical requirements are met, and there is no impact on the environment.

Description

Technical Field

[0001] The invention belongs to the field of PTA devices and relates to an intermediate silo mechanism with a vibrating screen. Background Art

[0002] At present, the intermediate silo of the PTA refining unit is normally discharged to the pulping tank through the rotary valve and spiral. During the production operation of the intermediate silo, a small amount of PTA material will adhere to the inner wall of the silo, gradually forming wall blocks. After a period of operation, the wall blocks of the intermediate silo will gradually fall off and then enter the pulping tank, causing frequent blockage of the pulping tank discharge filter, frequent switching and disassembly on site, affecting production operation, and affecting the stability of the hydrogenation reactor feed. Summary of the invention

[0003] In view of the drawbacks of the prior art, the present invention provides an intermediate silo mechanism with a vibrating screen to effectively solve the technical problems mentioned in the background technology.

[0004] The above object of the present invention is achieved through the following technical solutions:

[0005] A vibrating screen is added between the intermediate silo and the pulping tank production line, an inner extension pipe is added to the side of the cone of the intermediate silo, and the unloading rotary valve A is moved to the side unloading; the inner extension pipe is connected to the pneumatic gate valve A, reducer A, and soft connection in sequence through the stainless steel pipe A fixed by the flange A, and the two ends of the rotary valve moved to the side unloading are respectively connected to the soft connection A and the soft connection B, and continue to unload through the stainless steel pipe to the unloading spiral B;

[0006] The flange B is fixed below the cone of the intermediate silo. The added vibrating screen 14 is connected to the reducer B, the pneumatic gate valve B, and the flexible connection C in sequence. The two ends of the vibrating screen are respectively connected to the flexible connection C and the flexible connection D. The material is discharged to the discharge screw A through the stainless steel pipe B. The vibrating screen is connected to the slag discharge pipeline through the slag discharge port.

[0007] Furthermore, the inner extension tube has a length of 150 mm;

[0008] Furthermore, a screen is provided inside the vibrating screen. During normal operation, the motor drives the vibrating screen to form an inherent frequency vibration, so that the powder and the agglomerated materials are fully dispersed, and the powder quickly passes through the screen to the feeding screw A and the rotary valve B to the pulping tank; the agglomerated materials in the vibrating screen remain on the screen and are separated, and then discharged through the slag discharge port and collected.

[0009] The beneficial effects of the present invention compared with the prior art are:

[0010] After the transformation, the number of times the filter of the pulping tank was removed and cleaned was reduced, the stable operation cycle of the refining preheater was extended, the feed fluctuation of the hydrogenation reactor was reduced, the product index was stabilized, and the steam consumption was reduced. The on-site workload was reduced, safety technical requirements were met, and there was no impact on the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the structure of the intermediate silo with a vibrating screen.

[0013] In the figure: 1. inner extension pipe, 2. flange A, 3. stainless steel pipe A, 4. pneumatic gate valve A, 5. reducer A, 6. flexible connection A, 7. rotary valve A, 8. flexible connection B, 9. feeding screw B, 10. flange B, 11. reducer B, 12. pneumatic gate valve B, 13. flexible connection C, 14. vibrating screen, 15. flexible connection D, 16. stainless steel pipe B, 17. feeding screw A, 18. slag discharge port, 19. slag discharge pipeline. DETAILED DESCRIPTION

[0014] The present invention is described in detail below by specific examples, but the protection scope of the present invention is not limited. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can be obtained from commercial channels.

[0015] Example 1

[0016] In practical applications, in order to reduce the amount of block material entering the pulping tank, a vibrating screen is added between the taper of the two intermediate silos and the pulping tank. The present invention takes one of the intermediate silos as an example to illustrate that an inner extension pipe 1 is added to the side of the taper of the intermediate silo. The length of the inner extension pipe is 150 mm to reduce the amount of block material entering the rotary valve A7 from the side, and allows the block material to enter the vibrating screen 14 from the taper as much as possible to intercept the block material.

[0017] The unloading rotary valve A7 moves to the side for unloading; the inner extension pipe 1 is connected to the pneumatic gate valve A4, the reducer A5, and the flexible connection A6 in sequence through the stainless steel pipe A3 fixed by the flange A2. The two ends of the rotary valve A7 moved to the side for unloading are respectively connected to the flexible connection A6 and the flexible connection B8, and continue to unload through the stainless steel pipe A3 to the unloading screw B9.

[0018] It is fixed by flange B10 under the cone of the intermediate silo, and the added vibrating screen 14 is successively connected to the reducer B11, the pneumatic gate valve B12, and the flexible connection C13. The two ends of the vibrating screen 14 are respectively connected to the flexible connection C13 and the flexible connection D15, and the material is discharged to the discharge screw A17 through the stainless steel pipe B16; the vibrating screen 14 is connected to the slag discharge pipeline 19 through the slag discharge port 18.

[0019] The feed port and discharge port of the vibrating screen 14 are respectively provided with a flexible connection 13C and a flexible connection 15D to protect the pipeline and equipment from shaking. A screen is provided inside the vibrating screen 14. During normal operation, the motor drives the vibrating screen 14 to form an inherent frequency vibration, fully dispersing the powder and agglomerates, and the powder quickly passes through the screen and is discharged to the discharge screw 17A and finally to the pulping tank. The agglomerates in the vibrating screen 14 stay on the screen and are separated, and then discharged and collected through the slag discharge port 18.

[0020] The above-described embodiments are only preferred embodiments of the present invention, but not all feasible embodiments of the present invention. For those skilled in the art, any obvious changes made thereto without departing from the principles and spirit of the present invention should be considered to be included in the scope of protection of the claims of the present invention.

Claims

1. An intermediate silo mechanism with a vibrating screen, characterized in that A vibrating screen (14) is added between the intermediate silo and the pulping tank, and an inner extension pipe (1) is added to the side of the cone of the intermediate silo. The unloading rotary valve A (7) is moved to the side for unloading. The inner extension pipe (1) is connected to the pneumatic gate valve A (4), the reducer A (5), and the flexible connection A (6) in sequence through the stainless steel pipe A (3) fixed by the flange A (2). The two ends of the rotary valve A (7) moved to the side for unloading are respectively connected to the flexible connection A (6) and the flexible connection B (8). The unloading continues to be carried out through the stainless steel pipe A (3) to the unloading screw B (9). The lower part of the intermediate silo cone is connected to the reducer B (11), the pneumatic gate valve B (12), and the flexible connection C (13) in sequence through the flange B (10); the two ends of the vibrating screen (14) are respectively connected to the flexible connection C (13) and the flexible connection D (15); the flexible connection D (15) is connected to the feeding screw A (17) through the stainless steel pipe B (16); the feeding screw A (17) is connected to the feeding screw B (9), and the feeding screw B (9) is connected to the beating tank; the vibrating screen (14) is connected to the slag discharge pipeline (19) through the slag discharge port (18); The inner extension tube (1) is 150 mm long.

2. The intermediate silo mechanism with a vibrating screen as claimed in claim 1, characterized in that: The vibrating screen (14) is provided with a screen inside. During normal operation, the motor drives the vibrating screen (14) to vibrate at an inherent frequency, thereby fully dispersing the powder and agglomerated materials. The powder quickly passes through the screen and is discharged to the discharge screw A (17), and finally to the pulping tank. The agglomerated materials in the vibrating screen remain on the screen and are separated, and then discharged through the slag discharge port (18) and collected.

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