Negative-pressure air drying bin for cold-bonded pellets

Abstract

The utility model relates to air drying equipment in a cold bonding process, in particular to a negative-pressure air drying bin for cold bonded pellets. Comprising a rack and a material bin, the material bin comprises an upper material collecting bin and a lower material discharging bin, a vibrator is arranged on the outer wall of the material discharging bin, an air drying pipe set is arranged in the material collecting bin and comprises a main exhaust pipe and an auxiliary exhaust pipe, and the auxiliary exhaust pipe is erected above the material discharging bin; the bottom of the auxiliary exhaust pipe is provided with an exhaust opening, and the periphery of the exhaust opening is provided with an exhaust pipe fence. According to the air drying bin disclosed by the utility model, the air draft equipment is additionally arranged on the basis of an existing screening bin, and materials in the bin are air-dried through the negative pressure state of a working environment, so that not only is the drying time shortened, but also raised dust in the blanking and vibrating processes of the materials is sucked away in the air draft air drying process, and the dust removal effect is achieved; the pause time of the product in the bin is 2-3 hours, the initial setting effect is achieved, screening can be directly carried out, the screening process is greatly simplified, and pollution and cost are reduced.

Description

Technical Field

[0001] This utility model relates to air-drying equipment in cold consolidation processes, specifically a negative pressure air-drying chamber for cold-consolidated pellets. Background Technology

[0002] Cold bonding technology has gained increasing attention due to its advantages of low energy consumption and low pollution, and it is widely used in various powder molding production. Currently, after product pressing and molding, most drying processes involve oven drying or natural air drying. While oven drying is fast, it increases energy consumption and pollution, and its rapid drying shortens the binder reaction process, thus affecting product strength and quality. During natural air drying, due to the presence of some powder and poor air permeability, the drying speed is slow and uneven. After drying, it needs to be screened separately. During the screening process, the material in the temporary storage silo is not only subject to vibration causing some product damage, but also generates a large amount of dust, damaging the on-site working environment and increasing processing costs. Utility Model Content

[0003] This invention addresses the numerous shortcomings of existing drying processes mentioned in the background section by providing a negative pressure drying chamber for cold-cured pellets.

[0004] The technical solution adopted by this utility model is: a negative pressure air drying chamber for cold-cured pellets, including a frame and a silo. The silo includes an upper collection silo and a lower discharge silo. A vibrator is installed on the outer wall of the discharge silo. An air drying pipe assembly is installed inside the collection silo. The air drying pipe assembly includes a main exhaust pipe and a secondary exhaust pipe. The secondary exhaust pipe is installed above the discharge silo. An exhaust port is installed at the bottom of the secondary exhaust pipe, and an exhaust pipe fence is installed around the exhaust port.

[0005] As a preferred technical solution, the material level inside the collection bin is higher than that of the auxiliary exhaust pipe.

[0006] As a preferred technical solution: a bin wall fence is installed on the frame surrounding the bin, with a gap of 1-2 cm between the fences.

[0007] As a preferred technical solution: the auxiliary exhaust pipe has an axial opening at the bottom to form an exhaust port; one end of the auxiliary exhaust pipe is sealed, and the other end is connected to the main exhaust pipe; the free end of the main exhaust pipe extends out of the collection bin and is connected to the external ash collection device; a fan is installed on the main exhaust pipe.

[0008] As a preferred technical solution: the exhaust port is a long, narrow slit, and an exhaust pipe grille is installed on the wall of the auxiliary exhaust pipe along the periphery of the exhaust port.

[0009] As a preferred technical solution: the exhaust pipe fence is composed of several evenly arranged fence bars; the upper end of each fence bar is fixed to the lower wall of the auxiliary exhaust pipe, and the lower end is suspended above the side wall of the lower part of the silo.

[0010] As a preferred technical solution, the lower part of the fence post is fixed with horizontally installed reinforcing ribs.

[0011] As a preferred technical solution, the spacing between each fence bar in the exhaust duct fence is 0.8-2 cm.

[0012] As a preferred technical solution: the side wall of the discharge hopper is inclined, and the length of the fence bars varies with the incline; the length of the fence bars suspended in the middle of the discharge hopper is the same.

[0013] As a preferred technical solution, the distance between the two ends of the exhaust vent and the two side walls of the silo is 30-40 cm.

[0014] The air-drying silo disclosed in this utility model is based on an existing screening silo with the addition of an exhaust system. By creating a negative pressure environment in the working environment, the material in the silo is air-dried, which not only shortens the drying time, but also removes dust generated during material feeding and vibration, thus playing a dust removal role. The product stays in the silo for 2-3 hours to achieve a preliminary coagulation effect, and can be directly screened, which not only greatly simplifies the screening process, but also reduces pollution and costs. Attached Figure Description

[0015] Figure 1 This is a simplified structural diagram of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the stroke trunking group in this utility model.

[0017] Figure 3 This is a schematic diagram of the exhaust pipe fence structure in this utility model.

[0018] In the diagram: 1. Frame; 2. Discharge bin; 3. Vibrator; 4. Screening belt; 5. Drying pipe assembly; 5-1. Auxiliary exhaust pipe; 5-2. Support frame; 5-3. Main exhaust pipe; 5-4. Exhaust outlet; 6. Material distribution device; 7. Exhaust pipe fence; 8. Bin wall fence; 9. Collection bin. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] See appendix Figure 1-3The cold-forming pellet negative pressure drying chamber disclosed in this utility model is an improvement on the existing material screening silo, which combines material screening with drying function. This drying chamber includes a frame 1 and a silo, the silo comprising an upper collecting silo 9 and a lower discharging silo 2. A silo wall fence 8 is installed on the frame 1 surrounding the collecting silo 9. Preferably, the gaps between the silo wall fences 8 are 1-2 cm. A vibrator 3 is installed on the lower outer wall of the discharging silo 2. A drying pipe assembly 5 is installed inside the collecting silo 9, mounted above the discharging silo 2. A material distribution device 6 is installed on the frame 1 above the collecting silo 2 for replenishing the material in the silo. A screening belt 4 is installed below the discharging silo 2; the vibrated material is conveyed out through the screening belt 4, and dust generated during the feeding and vibration processes is extracted through the drying pipe assembly 5.

[0021] In a preferred embodiment, the air-drying duct assembly 5 includes a main exhaust duct 5-3, a secondary exhaust duct 5-1, and a support frame 5-2. The secondary exhaust duct 5-1 is mounted above the discharge hopper 2 via the support frame 5-2. The support frame 5-2 is a rod, with its lower end fixed to the partition of the adjacent discharge hopper 2 and its upper end fixed to the lower part of the secondary exhaust duct 5-1. An axial opening is formed in the lower part of the secondary exhaust duct 5-1, creating an exhaust port 5-4. One end of the secondary exhaust duct 5-1 is sealed, and the other end is connected to the main exhaust duct 5-3. The exhaust port 5-4 faces the hopper 2. Preferably, the secondary exhaust duct 5-1 is positioned at the centerline of the width of the hopper 2. One end of the main exhaust duct 5-3 is connected to the secondary exhaust duct 5-1, and the other end extends out of the collection hopper 9 and connects to the terminal ash collection device. A fan is installed on the main exhaust duct 5-3 to achieve exhaust.

[0022] In another preferred embodiment, the exhaust vent 5-4 is a long, narrow slit, positioned below the auxiliary exhaust duct 5-1. The distances from both ends of the auxiliary exhaust duct 5-1 to the side walls of the material collection silo 9 are 30-40 cm. The distances from both ends of the exhaust vent 5-4 to the auxiliary exhaust duct are also similar. A row of exhaust duct fences 7 is installed on the wall of the auxiliary exhaust duct 5-1 surrounding the exhaust vent 5-4, forming a rectangular fence frame around the exhaust vent 5-4. The exhaust duct fence 7 consists of several evenly arranged fence bars. The upper end of each fence bar is fixed to the lower wall of the auxiliary exhaust duct 5-1, and its lower end is suspended above the side wall of the discharge silo 2. Specifically, the side wall of the silo 2 is a slope, and the length of the fence bars suspended on both sides of the silo 2 increases with the slope; the length of the fence bar suspended in the center of the silo is the same. See [link to relevant documentation]. Figure 2 The fence above each hopper has sections that are short on both sides and long on the sides, with the longest section in the middle. Several of these longest sections are arranged side by side.

[0023] As a preferred option, a horizontally installed reinforcing rib is fixed to the lower part of the fence post, and at least one reinforcing rib is installed in each storage bin to achieve stable fixation of the fence post.

[0024] As a preferred option, the spacing between each fence post is 0.8-2 cm, which can collect dust while also preventing the pellets from being trapped outside.

[0025] Preferably, a level gauge is installed on the side wall of the collection bin 2 to monitor the material level inside the bin 2. The level gauge is connected to the controller. In order to maintain a negative pressure environment throughout the drying process, the material level inside the bin 2 is always higher than the auxiliary exhaust pipe 5. The drive of the material distribution device 6 is connected to the controller; the operation of the material distribution device is controlled by the feedback of the material surface position from the level gauge.

[0026] The working process of this utility model is as follows:

[0027] First, the material is filled sequentially from the silos using a feeding device. The number of silos is randomly set according to the actual situation. In this embodiment, there are four silos, numbered 1-4 from left to right. Then, starting from silo 1, vibrator 3 is started sequentially to discharge material onto the screening belt 4. To maintain a negative pressure state within the material layer, the material level is not lower than the exhaust duct during discharge. Inside the silo, the material layer is in a flowing state. Dust and hot air are drawn away through the duct assembly. Other silos awaiting discharge generate heat due to the reaction of the adhesive. Discharge from silo 1 is stopped after it reaches the top of the exhaust duct. The feeding belt is moved to silo 1 to add material, while vibrator 2 is started to discharge material, and so on in a cyclical manner.

Claims

1. A cold-bonded pellet negative pressure air-drying bin, comprising a frame and a bin, the bin comprising an upper material collecting bin and a lower material discharging bin, a vibrator being arranged on the outer wall of the material discharging bin, characterized in that: a group of air-drying pipes is arranged in the material collecting bin, the group of air-drying pipes comprising a main air-drying pipe and a secondary air-drying pipe, the secondary air-drying pipe being arranged above the material discharging bin; an air-drawing opening is arranged at the bottom of the secondary air-drying pipe, and an air-drawing pipe fence is arranged around the air-drawing opening. The material surface in the material collecting bin is higher than the secondary air-drying pipe.

2. A cold-bonded pellet negative pressure air drying silo according to claim 1, characterized in that, A bin wall fence is installed on the frame around the material collecting bin, and the gap of the bin wall fence is 1-2 cm.

3. The cold-bonded pellet negative pressure air drying silo according to claim 1, characterized in that, The secondary air-drying pipe is axially perforated at the lower part to form the air-drawing opening; one end of the secondary air-drying pipe is sealed, and the other end is communicated with the main air-drying pipe; the free end of the main air-drying pipe extends out of the material collecting bin and is communicated with an external dust collecting device; and a fan is installed on the main air-drying pipe.

4. The cold-bonded pellet negative pressure air drying silo according to claim 1, characterized in that, The air-drawing opening is a long strip-shaped gap, and an air-drawing pipe fence is arranged around the air-drawing opening on the wall of the secondary air-drying pipe.

5. The cold-bonded pellet negative pressure air drying silo according to claim 1, characterized in that, The air-drawing pipe fence is composed of a plurality of uniformly arranged fence bars; the upper end of each fence bar is fixedly connected with the lower wall of the secondary air-drying pipe, and the lower end of each fence bar is suspended above the side wall of the lower part of the bin.

6. A cold bonded pellet negative pressure air drying silo according to claim 5, characterized in that, The lower part of each fence bar is fixedly connected with a horizontally arranged reinforcing rib.

7. A cold bonded pellet negative pressure air drying silo according to claim 6, characterized in that, The distance between each fence bar in the air-drawing pipe fence is 0.8-2 cm.

8. The cold bonded pellet negative pressure air drying silo according to claim 6, wherein, The side wall of the material discharging bin is a slope, and the length of each fence bar varies with the slope; the lengths of the fence bars suspended above the middle part of the material discharging bin are the same.

9. The cold bonded pellet negative pressure air drying silo according to claim 6, wherein, The distance between the two ends of the air-drawing opening and the two side walls of the material collecting bin is 30-40 cm.

10. The cold bonded pellet negative pressure air drying silo according to claim 5, wherein, ​

Images