Circular mold pelletizer

Abstract

The invention relates to a circular mold pelletizer and especially relates to a circular mold pelletizer for biomass pelletizing. The circular mold pelletizer comprises a main machine (1), a circular mold (4), a driving wheel (6), a main shaft (8), a main machine hollow shaft (9), a roller assembly (10), a main shaft pressing plate (13), slicers (28), a door cover (16), a gear shaft (26), forced feeders (17), feed inlets (21) and a discharge outlet (22). The circular mold pelletizer also comprises a division plate (14) and a door cover pressing plate (15), wherein the division plate (14) is connected to the main shaft pressing plate (13) at an end of the main shaft (8); the door cover pressing plate (15) is arranged at an inner side of the door cover (16); and the door cover pressing plate (15) and the division plate (14) are movably connected together. The circular mold pelletizer has the advantages that the circular mold pelletizer has a simple structure; a front end of the main shaft (8) is supported; the main shaft (8) moves up and down in a small range and has a long service life; raw material feeding is smooth; arch forming and material blocking are produced difficultly; adjustment of a roller-mold gap is convenient; and an overload protection capacity is strong.

Description

technical field [0001] The invention relates to a ring die granulator, in particular to a ring die granulator mainly used for biomass granulation. The invention is suitable for making pellets from materials in various industries such as feed, grain, food, chemical industry, medicine, fertilizer, etc., especially for biomass production such as wood chips, straw, bamboo chips, cotton wood particles, hops, and agricultural waste. grain. The invention belongs to the technical field of particle forming processing equipment. Background technique [0002] As a very mature traditional pellet forming and processing equipment, the ring die pellet mill is also an important pellet forming and processing equipment that is widely used and indispensable. The physical and biochemical properties of materials can be changed by ring die granulator to meet the needs of feed, grain, food, chemical, pharmaceutical, fertilizer and other industries for granulated materials. The main working par...

AI Technical Summary

Problems solved by technology

Therefore, the force between the pressure roller assembly and the ring die is transmitted to the box through the safety pin seat and the safety pin at one end of the main shaft during work, so that the rear end of the main shaft is supported, but the front end of the main shaft cannot be supported. This structure makes the main shaft jump up and down greatly, and the working state is unstable; moreover, due to the uneven distribution of the incoming material, the inconsistent thickness of the material layer will also cause the main shaft to jump up and down, and the working state is unstable; this aspect affects the product quality of granulation Stability. On the other hand, the main shaft has a short service life and is easy to break. Due to the high price of the main shaft, this leads to an increase in the cost of use and poor safety in use.

In addition, once the main shaft breaks, it will be stopped for replacement, which also causes a large loss to production.

[0004] (2) The material feeding is not smooth, and it is easy to arch and block the material

At present, the material of the ring die granulator is fed into the die cover by the forced feeder, and then the material is fed into the pressing chamber through the feeding scraper. There is no thrust effect. In addition, the die cover, feeding scraper, and spindle head block the material. If the material is blocked in the pressing room, it can be blocked all the way to the forced feeder. The thrust of the forced feeder acts on the feeding scraper, spindle head, etc. to block the material. Therefore, for loose, low-density, and poor-flowing materials, the existing ring die granulators are very easy to jam, arch, and block materials, and insufficient feed often occurs at the feed port. The phenomenon of arching and blocking materials occurs from time to time, which brings considerable difficulties to granulation, which greatly affects the production efficiency, causes high production costs, and brings great inconvenience to production.

In addition, when materials with poor fluidity enter the pressing chamber, because there is no axial driving force, there may be too much material at the feed inlet and arching, and there is no material inside, which will affect the output and cause vibration.

[0005] (3) Die roller gap adjustment is inconvenient, and overload protection ability is poor

The main problems in the structure of this mold roll gap adjustment are: 1. when the mold roll gap is adjusted, the machine must be shut down, which greatly affects the production efficiency and causes the production cost to rise; The current operation is to stop the machine for adjustment and start it up to see if it meets the requirements. If the requirements are not met, stop the machine again for adjustment. In actual operation, it often takes 2 to 3 months of repeated adjustments before it can be adjusted in place, which is very troublesome and inconvenient; In the event of overload, the safety pin breaks to protect the transmission parts such as the main shaft from overloading. However, when the safety pin breaks, the gap between the ring die and the pressure roller of the existing ring die granulator cannot be changed. The ring die and the pressure roller cannot be loosened, so it is easy to cause damage to some transmission parts, and it is impossible to achieve real overload protection; ④ The operator has high requirements for the adjustment of the die roller gap, and the general operator needs to be trained in biomass granulation It takes about 3 months to find out the best experience of adjusting the gap between the die rollers, and the number of debugging personnel is difficult to meet the requirements, which has caused a huge obstacle to the entire biomass pelleting industry, which greatly limits and hinders the ring die pelletizer The use and promotion of the ring die granulator increases the use cost of the ring die granulator and brings great inconvenience to the use and maintenance of the ring die granulator

Images