Exhaust device of granulator

Abstract

The utility model relates to the technical field of granulation machines, and particularly discloses an exhaust device of a granulation machine. The device comprises an air extraction assembly, an air guide pipe, a water collection piece and an air extraction pump which are installed on a housing, the air guide pipe communicates with the outer side of the housing, the end, away from the housing, of the air guide pipe is obliquely arranged downwards, the water collection piece comprises a cooling pipe arranged in the air guide pipe and a water collection barrel arranged at the bottom of the air guide pipe, and the air extraction pump is connected with the bottom end of the air guide pipe. A cold water tank is arranged on the base station and used for adding cold water into the cooling pipe, the water inlet end and the water outlet end of the cooling pipe are both communicated with the cold water tank, and the water collecting barrel is used for collecting liquid formed by condensing gas discharged by the granulator; water vapor generated by extruding particles is pumped out of the housing through the air pump, the water vapor is cooled through the cooling pipe in the air guide pipe and then condensed on the outer wall of the cooling pipe, the water collecting cylinder collects water condensed in the air guide pipe, the water vapor in the circular mold is discharged, and the phenomenon that the particles are cracked by the water vapor after being formed is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pellet machines, in particular to an exhaust device of a pellet machine. Background Art

[0002] The pellet machine uses agricultural and forestry waste such as wood chips, straw, rice husks, bark and other biomass as raw materials, and solidifies them into high-density pellet fuel through treatment and processing. It is an efficient, clean and renewable energy source.

[0003] For example, a Chinese utility model patent with a publication (announcement) number of CN212524018U discloses an exhaust device for a ring die of a biomass pellet machine, including a base, a box body, a hollow shaft, a ring die, two pressure rollers and a support, the hollow shaft passes through the box body and is rotatably connected to the box body, the two pressure rollers are located in the ring die and abut against the inner wall of the ring die, and also includes a front baffle, a cover shell, and upper and lower baffles spliced ​​to each other. A plurality of exhaust holes are opened on the cover shell, which is arc-shaped and covers the outside of the ring die. When the material is extruded, the water vapor in the material is discharged through the exhaust holes, but the discharged water vapor is dispersed in the air around the ring die. After the humidity of the air increases, the water vapor in the air will enter the ring die, increasing the possibility of the particles being cracked by water vapor after forming. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide an exhaust device for a pellet machine to reduce the occurrence of pellets being cracked by water vapor after being formed.

[0005] The technical solution adopted by the utility model is:

[0006] An exhaust device for a pellet machine includes an exhaust assembly installed on a cover shell, the exhaust assembly includes an air duct, a water collecting member and an exhaust pump, the air duct is connected to the outside of the cover shell, the air duct is tilted downward at one end away from the cover shell, the water collecting member includes a cooling pipe arranged in the air duct and a water collecting cylinder arranged at the bottom of the air duct, the exhaust pump is connected to the bottom end of the air duct, a cold water tank is arranged on the base, the cold water tank is used to add cold water to the cooling pipe, the water inlet end and the water outlet end of the cooling pipe are connected to the cold water tank, and the water collecting cylinder is used to collect liquid formed by condensation of gas discharged from the pellet machine.

[0007] The water vapor generated by extruding the particles is extracted from the cover shell through the vacuum pump. The water vapor is cooled by the cooling pipe in the air duct and condensed on the outer wall of the cooling pipe. The air duct is inclined to facilitate the dripping of condensed water on the outer wall of the cooling pipe. The water collecting cylinder arranged at the bottom of the bottom of the air duct collects the condensed water in the air duct and discharges the water vapor in the ring die, thereby reducing the continuous increase of the humidity of the air around the pellet machine and the occurrence of particles being cracked by water vapor after forming.

[0008] Optionally, the cooling pipe is arranged in an axial spiral around the air guide pipe.

[0009] The spiral winding of the cooling tube increases the contact area between the water vapor and the cooling tube, improves the condensation efficiency of the water vapor on the cooling tube, and further reduces the phenomenon of particles being cracked by water vapor after being formed.

[0010] Optionally, the water collecting cylinder is arranged at the bottom end of the air guide pipe, and a drain valve is installed at the bottom of the water collecting cylinder.

[0011] The water collecting tube is arranged at the bottom of the air guide pipe to collect the water condensed in the air guide pipe, reduce the water from entering the environment around the ring die again, and further reduce the phenomenon of particles being cracked by water vapor after forming.

[0012] Optionally, a drain pipe is provided at the bottom of the water collecting cylinder, and the drain valve is installed on the drain pipe.

[0013] When the amount of water collected in the water collection cylinder is too large, open the valve and the water in the water collection cylinder will be discharged through the drain pipe.

[0014] Optionally, two groups of the air extraction components are provided, and the two air extraction components are respectively arranged on the left and right sides of the ring mold.

[0015] Two sets of exhaust components are arranged on the left and right sides of the ring die. The air enters the gap from the bottom of the cover shell. The air entry direction is opposite to the discharge direction, which improves the exhaust efficiency of water vapor and further reduces the phenomenon of particles being cracked by water vapor after forming.

[0016] The beneficial effects of the utility model are as follows: the water vapor generated by extruding the particles is extracted from the cover shell through the vacuum pump, the water vapor is cooled by the cooling pipe in the air guide pipe and condensed on the outer wall of the cooling pipe, the air guide pipe is inclined to facilitate the dripping of condensed water on the outer wall of the cooling pipe, and the water collecting cylinder arranged at the bottom of the bottom end of the air guide pipe collects the condensed water in the air guide pipe, discharges the water vapor in the ring die, reduces the continuous increase of the humidity of the air around the pellet machine, and reduces the phenomenon of particles being cracked by water vapor after being formed. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] The numbers and names in the figure correspond to each other as follows: 1. base; 2. ring die; 21. cover shell; 3. pressure roller; 31. core shaft; 4. support; 5. air guide pipe; 6. vacuum pump; 7. cooling pipe; 8. water collecting cylinder; 81. drain pipe; 82. valve; 9. cold water tank. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 , the utility model provides a technical solution:

[0021] An exhaust device for a pellet machine, referring to Figure 1 , including a base 1, a box, a hollow shaft, a ring die 2, a pressure roller 3 and a support 4. The box and the support 4 are arranged in parallel on the base 1. The hollow shaft passes through the box horizontally and is rotatably connected to the box. A transmission wheel is arranged at one end of the hollow shaft close to the support 4. The axial direction of the ring die 2 is arranged along the front-back direction. The ring die 2 is coaxially connected to the side of the transmission wheel away from the hollow shaft. Two mandrels 31 parallel to the axial direction of the ring die 2 are arranged on the support 4. The pressure roller 3 is provided with two ends rotatably connected to the two mandrels 31 away from the support 4. The two pressure rollers 3 are both located The ring die 2 is in contact with the working surface of the inner wall of the ring die 2. The outer cover of the ring die 2 is provided with a cover shell 21. The side wall of the cover shell 21 is set as a closed plate. The cover shell 21 is sleeved on the outer periphery of the ring die 2. The cover shell 21 is fixedly connected to the support 4. A discharge port is opened at the bottom of the cover shell 21. The material is transmitted to the ring die 2 through the hollow shaft. The pressure roller 3 squeezes the material and then extrude it from each hole of the ring die 2. The extruded material rotates with the ring die 2. When the material is extruded to a certain length, it is broken under the action of centrifugal force and flies outward and is discharged from the discharge port.

[0022] An opening is provided at the bottom of the cover shell 21 for discharging material particles, a gap is provided between the inner wall of the cover shell 21 and the ring die 2, two sets of exhaust components are provided outside the cover shell 21, and the two sets of exhaust components are respectively arranged on the left and right sides of the axial direction of the ring die 2, and the exhaust components include an air guide pipe 5, a water collecting part and an exhaust pump 6.

[0023] The air guide pipe 5 is connected to the outside of the cover shell 21, one end of the air guide pipe 5 is fixedly connected to the cover shell 21, and the other end is inclined downward in the direction away from the cover shell 21. The air pump 6 is connected to the bottom end of the air guide pipe 5, and the air pump 6 is fixedly connected to the air guide pipe 5. The air pump 6 is connected to the base 1 through a bracket. The water collecting part includes a cooling pipe 7 arranged in the air guide pipe and a water collecting cylinder 8 arranged at the bottom of the air guide pipe 5. The water inlet end and the water outlet end of the cooling pipe 7 are both arranged at the top of the upper end of the air guide pipe 5. In order to improve the condensation efficiency of water vapor, the cooling pipe 7 is spirally arranged around the axial direction of the air guide pipe 5. The cooling pipe 7 and the air guide pipe 5 are integrally formed. A cold water tank 9 is arranged on the base 1, and the cold water tank 9 is connected to the base 1 through a bracket. The water inlet end and the water outlet end of the cooling pipe 7 are both fixedly connected to the cold water tank 9. The cold water in the cold water tank 9 enters the cooling pipe 7 from the water inlet pipe and then enters the cold water tank 9 from the water outlet pipe, so as to facilitate the circulation of the cold water in the cooling pipe 7.

[0024] In order to reduce the particles squeezed out from the ring die 2 entering the air duct 5, a screen is arranged in the air duct 5. The screen is arranged at the top of the air duct 5. The side of the screen is sealed and connected to the inner wall of the air duct 5 through a sealing ring. The aperture of the screen is smaller than the aperture of the ring die 2.

[0025] The water collecting cylinder 8 is fixedly connected to the bottom end of the air duct 5, the top of the water collecting cylinder 8 is connected to the bottom of the air duct 5, the bottom of the water collecting cylinder 8 is connected to a drain pipe 81, and a valve 82 for controlling the opening and closing of the drain pipe 81 is provided on the drain pipe 81. When the amount of water collected in the water collecting cylinder 8 is too large, the valve 82 is opened to drain the water in the water collecting cylinder 8.

[0026] Finally, it should be noted that the above description is only a preferred example of the present utility model and is not intended to limit the present utility model. Although the present utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions described in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. An exhaust device for a pellet machine, characterized in that: The invention comprises an air extraction component installed on a housing, the air extraction component comprising an air guide pipe (5), a water collecting part and an air extraction pump (6), the air guide pipe (5) being connected to the outside of the housing (21), the air guide pipe (5) being arranged at an end away from the housing (21) and being inclined downward, the water collecting part comprising a cooling pipe (7) arranged in the air guide pipe (5) and a water collecting cylinder (8) arranged at the bottom of the air guide pipe (5), the air extraction pump (6) being connected to the bottom end of the air guide pipe (5), a cold water tank (9) being arranged on the base (1), the cold water tank (9) being used for adding cold water into the cooling pipe (7), the water inlet end and the water outlet end of the cooling pipe (7) being connected to the cold water tank (9), and the water collecting cylinder (8) being used for collecting liquid formed by condensation of gas discharged from the pellet machine.

2. The exhaust device of a pellet machine according to claim 1, characterized in that: The cooling pipe (7) is spirally arranged around the axial direction of the air guide pipe (5).

3. The exhaust device of a pellet machine according to claim 1, characterized in that: The water collecting cylinder (8) is arranged at the bottom end of the air guide pipe (5), and a drainage valve (82) is installed at the bottom of the water collecting cylinder (8).

4. The exhaust device of a pellet machine according to claim 3, characterized in that: The bottom of the water collecting cylinder (8) is connected to a drainage pipe (81), and the drainage valve (82) is installed on the drainage pipe (81).

5. The exhaust device of a pellet machine according to claim 1, characterized in that: The air extraction components are provided in two groups, and the two air extraction components are respectively arranged on the left and right sides of the ring mold (2).

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