Novel biomass continuous drying device

Abstract

The utility model discloses a novel biomass continuous drying device which comprises a reactor body, a baffle and a shifting plate which are fixed on a shell, a rotating shaft and a driving motor which are connected to the reactor, a rotating shaft shell fixed on the rotating shaft, and a tray and a driving turnover motor which are fixed on the rotating shaft shell, the tray is provided with air holes for drying medium airflow to penetrate through the dried materials, a feeding port and an air outlet in the top of the device, and a discharging port and an air inlet in the bottom of the device. Each layer of tray is divided into a plurality of fan-shaped blocks, each fan-shaped block is provided with a driving motor which is connected with the fan-shaped block and is fixed on a rotating shaft together with the fan-shaped block, and blanking towards the lower layer is achieved by turning over the fan-shaped blocks. The device is suitable for biomass drying.

Description

Technical Field

[0001] The invention relates to a novel biomass continuous drying device, belonging to the technical field of biomass energy. Background Art

[0002] Drying is a common pretreatment method for biomass, which can effectively increase the energy density of biomass raw materials, improve their mechanical properties, and to a certain extent solve the problems of high moisture content, low calorific value, and difficulty in storage of biomass, thereby reducing the cost of transportation, processing, storage and utilization as energy.

[0003] Chinese patent CN103370401A discloses a method and system for drying lignocellulosic materials. The principle of the drying device is that the biomass raw materials rotate with the trays on the upper part of the vertically stacked trays in the drying reactor and contact with the high-temperature gas sprayed into the reactor to achieve drying. The biomass is continuously fed and dried through the fixed scraper set by the scraper, and falls from the notch of the upper tray to the lower tray to achieve the transfer of materials between the upper and lower trays. However, this design makes the time that the biomass stays on each tray very short and uncertain, and the drying effect is uncertain and related to the relative position of the scraper and the groove when feeding. According to its scheme, the scraper can also be rotated without rotating the tray, which will avoid the problem of uncertain effect, but the scraper has to push the entire layer of material to move toward the outlet, which has huge resistance, which seriously reduces the durability and efficiency of the device. At the same time, in actual use, since the gas injected into the reactor can only enter the space above the upper tray through the gap on the upper tray, the gas cannot be evenly distributed and its contact time with the biomass raw material is very short. In this way, the gas enters the space above the upper tray through the gap on the upper tray before sufficient heat exchange, which seriously reduces the baking effect. Chinese patent CN204400905U designs a stacked disc baking reactor, which improves the problem of gas escaping directly from the gap into the drying space through a complex air intake design, but there are still problems such as the high pressure on the scraper and the paddle, and the durability of the device. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the utility model proposes a novel multi-layer continuous drying device.

[0005] The device designed in the utility model comprises a cylindrical reactor shell, a tray, a driving motor, a baffle, a tray turning motor, a driving shaft and connection components between different parts.

[0006] The utility model is a cylindrical structure as a whole. A uniform drying medium airflow is introduced through the air inlet at the bottom of the drying device, and the airflow passes through the air holes of each layer of the tray to achieve forced convection drying, and flows out through the air outlet at the top of the device. In order to ensure uniform distribution of air inlet and outlet, the air inlet and outlet are arranged evenly around the central axis of the device.

[0007] The first layer is fed through the feed port, and falls on the first layer tray through the feed channel composed of baffles. Its position is located at the position of the flip tray block. The feed port baffle prevents the feed flow from being blown away and directly falls into the flip tray block range and directly falls into the second layer. After falling to the designated position of the tray, the drive motor drives the shaft to rotate, and the shaft drives the tray connected to it to rotate clockwise, driving the material on it to move clockwise. The material is evenly spread on the tray through a paddle at a certain height from the tray. The paddle is fixed on the device housing, and its length extends radially to the shaft housing 2c, up to the upper tray, and the lower edge is a certain distance from the tray of this layer, which can be determined according to the thickness of the material to be dried. Its function is to spread the material evenly on the tray, and the tray is evenly processed after receiving the material to improve the drying efficiency. The baffle is fixed on the device housing, and its length extends radially to the shaft housing, up to the upper tray, and down to the tray of this layer. To prevent friction, there is a small gap in the middle. It is used to ensure the feeding stability of this layer, prevent the feeding material from being blown away by the baking medium, and prevent the feeding material from being blown to the feeding port near it due to the baking medium, which reduces the drying efficiency.

[0008] The shaft of each flip tray block is connected to a driving flip motor fixed on the shaft housing. It is fixed on the shaft and rotates with the shaft. It mainly plays a fixing role and drives the tray to rotate. The fan-shaped block shaft support hole is used to fix the fan-shaped block shaft. At the same time, each fan-shaped block is further fixed and supported to maintain the stability of the tray. Every time the flip tray block reaches the specified position (before the counterclockwise side of the baffle), the flip motor controls the corresponding tray block to flip half a circle, so that the material in this area falls completely into the next layer, and at the same time does not affect the uniform passage of the drying medium through the tray. From the position of the fan-shaped tray block before the tray rotates to the position of the fan-shaped block before the baffle of the blanking port, the drying of the material on the first layer of the tray is completed. During the drying process, only a very small amount of airflow escapes from the lower drying space during a very short tray flipping process, and the uniformity of the drying medium is very good.

[0009] In the middle layer, when the upper flip tray block reaches the designated position, it falls to the next layer through the feeding port of this layer surrounded by the baffle and the paddle. The difference from the first layer is that the feeding channel section is different. The non-first layer feeding port uses the fan-shaped block area below the entire feeding port to feed the material. The size of the baffle corresponds to it. The drying process of the material in this layer is the same as that of the first layer.

[0010] The bottom material is output after drying, and a discharge port is set between the bottom tray and the device chassis. The size of the discharge port can be adjusted according to the pipe port of the equipment connected to it. It is surrounded by a discharge port baffle and a discharge port guide plate, and the discharge is realized in the same way as the blanking principle.

[0011] Each layer of material is dried by the airflow introduced from below, thereby achieving continuous multi-layer and multiple-time continuous drying, and finally the dry product is obtained from the bottom discharge port of the entire structure through the bottom layer.

[0012] In this solution, the tray has no gaps, and the baking medium can better contact with the material, so the drying is more uniform, more efficient, and has a better drying effect. At the same time, the biomass is not moved by scrapers, but only a small resistance plate is used to evenly distribute the biomass, which greatly reduces the resistance of the drive motor, is friendly to the life of the motor and equipment materials, and the equipment runs more stably, while saving electricity costs and improving drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Diagram of removing the front cover of the device

[0014] Figure 2 The main view of the internal structure of the device

[0015] Figure 3 Schematic diagram of the internal structure of the tray and the central shaft

[0016] Figure 4 A top view of any sector of the tray

[0017] Figure 5 Shaft with hole housing

[0018] Figure 6 Overall external top view of the device

[0019] Figure 7 Bottom view of the overall exterior of the device

[0020] Figure 8 Perspective view of the device's hinge housing supporting a single tray

[0021] Fig. 9 Detail of the device baffle

[0022] In the figure: feed port 1a, a baffle plate 1b at the feed port, a paddle plate 1c at the feed port, a drive motor 2a, a drive shaft 2b, a shaft housing 2c, a fan-shaped block shaft support hole 2d, a device housing 3a, a device baffle (each layer) 3b, a device paddle (each layer) 3c, a bottom air inlet 3d, a top air outlet 3e, a tray 4a, a flip tray block 4b, a tray air hole 4c, a fan-shaped block shaft 4d, a flip motor 4e, a discharge port baffles 5a, 5b, and a discharge port guide plate 5c. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention are described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The utility model is a drying device part, which is a cylindrical structure as a whole. Through the air inlet 3d at the bottom of the drying device, a uniform drying medium is introduced, and the baking medium passes through the air holes 4c of each layer of the tray to achieve forced convection drying, and flows out through the air outlet 3e at the top of the device. In order to ensure uniform distribution of air inlet and outlet, the air inlet 3d and the air outlet 3e are arranged evenly around the central axis of the device.

[0025] In the first layer of the drying device, the material is fed through the feed port 1a, and falls on the first layer tray 4a through the feed channel composed of baffles 1b and 1c. Its position is located before the flip tray block 4b (here 4b is taken as an example, each tray can be flipped and has the same design) (one piece in clockwise progression). The feed port baffle 1b prevents the feed flow from being blown away and directly falling into the flip tray block range and directly falling into the second layer. After falling to the designated position of the tray, the driving motor 2a drives the rotating shaft 2b to rotate, and the rotating shaft drives the tray 4a connected to it to rotate clockwise (looking down), driving the material on it to move clockwise, and the material is evenly spread on the tray through the paddle 1c at a certain height from the tray to ensure the drying effect. The shaft of each flip tray block is connected to a driving flip motor fixed on the rotating shaft housing 2c, so that each time the flip tray block 4b reaches the designated position (before the baffle counterclockwise side), the flip motor 4e controls the corresponding tray block 4b to flip half a circle, so that the material in this block area is completely dropped into the next layer, and at the same time, it does not affect the baking medium to pass through the tray evenly. From the time when the material falls from this sector-shaped tray block to the position of the sector-shaped block before the material-falling baffle 1b following the tray rotation, the material on the sector-shaped block on the first layer of tray is dried. During the drying process, only a very small amount of gas escapes from the lower drying space during a very short tray flipping process, and the baking medium is very uniform.

[0026] For the middle layer of the drying device, when the flip tray block 4b of the upper layer reaches the specified position, the material inlet of this layer surrounded by the baffle 3b and the dial plate 3c falls to the next layer. The difference from the first layer is that the cross-section of the feeding channel is different. In order to make the material distribution more uniform, the non-first layer feeding port adopts the fan-shaped block area below the entire feeding port to feed the material, and the size of the baffle corresponds to it. The material drying process in this layer is the same as that in the first layer.

[0027] At the bottom layer of the device, the material is discharged from this layer after drying. A discharge port is set between the bottom tray and the bottom plate of the device. The size of the discharge port can be adjusted and designed according to the pipe port of the equipment connected to it. It is surrounded by the discharge port baffles 5a, 5b and the discharge port guide plate 5c. The principle is the same as that of falling materials, and the material falls to 5c to realize discharge.

[0028] In the above utility model: the feed port 1a, a layer of baffle 1b at the feed port, and a layer of dial plate 1c at the feed port: fixed on the device housing 3a, together constitute a feed channel. In order to prevent blockage or siltation caused by material accumulation in the dead corner of the feed port, the feed port is set smaller and the baffle size corresponds to it. The radial length is half of the radius, forming an entire channel leading to the first-layer pallet, and the dial plate 1c is used to achieve uniform distribution of the feed on the pallet.

[0029] The shaft housing 2c is fixed on the shaft and rotates with the shaft. It mainly plays a fixing role and drives the tray to rotate. The fan-shaped block shaft support hole 2d is used to fix the fan-shaped block shaft 4d. At the same time, each fan-shaped block is further fixed and supported (see details). Figure 8 ) to keep the pallet stable.

[0030] Device baffle 3b: fixed on the device housing 3a, the length extends radially to the shaft housing 2c, up to the upper tray, and down to the current tray, with a small gap in the middle to prevent friction. It is used to ensure the stability of the current layer of feeding, prevent the feeding material from being blown away by the baking medium when feeding, and prevent the feeding material from being blown to the nearby drop port due to the baking medium, which reduces the drying efficiency, and forms a feeding channel with the device paddle 3c.

[0031] Device shifting plate 3c: fixed on the device housing 3a, with a length extending radially to the shaft housing 2c, up to the upper tray, and lowered to a certain distance from the tray of this layer, which can be determined according to the thickness of the material to be dried. Its function is to spread the material evenly on the tray, and evenly process the material after the tray receives it.

[0032] Tray 4a: It is fixed on the shaft 2b through the flip motor 4e and the fan-shaped block shaft support hole 2d, and rotates clockwise with the shaft 2b (looking down). It is provided with air holes 4c to achieve air drying and carry the material to achieve continuous drying. The tray is composed of 16 identical fan-shaped flip tray blocks 4b.

[0033] Flip tray block 4b: constitutes tray 4a, and its function is to realize the transportation of materials from the upper layer to the lower layer. It is the main device for realizing multi-step continuous drying. It is connected to the flip motor 4e through the fan-shaped block shaft 4d and is supported by the fan-shaped block shaft support hole 2d. Through the flip motor 4e, the material on the tray block that has been dried for a week can be dropped to the lower layer before the feeding port, and at the same time, it can ensure that the baking medium passes through the tray evenly instead of escaping from the drying space of this layer from the gap.

[0034] Turning motor 4e: drives the turning tray block 4a to turn over to transfer materials from the upper layer to the lower layer. Only very small power is needed to turn over this fan-shaped tray, which solves the problem of uniform drying and baking medium escaping from the drying space.

[0035] The use process of the utility model is as follows: First, the driving motor 2a is started to drive the driving shaft 2b and the shaft housing 2c to rotate, and then the tray 4a is driven to rotate. The baking medium is introduced from the bottom, and the baking medium enters through the bottom air inlet 3d, passes through the tray air holes 4c of the three-layer tray, and is discharged through the top air outlet 3e. The material is continuously input at a uniform speed at the feed inlet 1a, and is discharged to the first-layer tray through the feed channel. The tray 4a drives the material to rotate clockwise. Under the action of the paddle 3c, the material is evenly spread on the tray 4a, so that the baking medium introduced from the bottom continuously passes through the material carried by the tray through the tray air holes 4c, and the material here begins to be dried. When the material here rotates one circle with the tray, it is driven by the flip motor 4e at the designated position, flipped half a circle so that the material on it falls into the lower tray, and the same applies to each fan-shaped flip tray 4b on the tray 4a. At this time, the first tray is evenly covered with materials. As materials are continuously input at the inlet, the upper trays are continuously input to the lower trays until each tray is covered with biomass, and continuous multi-stage drying begins. At this time, materials are continuously input, and the bottom tray 4a transports the dried materials to the outlet just like transporting materials to the lower trays.

[0036] The advantages of the utility model are: the device uses the method of lower air intake and counter-flow of the baking medium and the material, so that the high-temperature baking medium first passes through the lower layer of preliminarily dried materials, and then passes through the undried materials, ensuring that there is always a suitable temperature difference between the baking medium and the materials, improving the utilization rate of the baking medium, and improving the drying efficiency. Multiple evenly distributed bottom air inlets 3d and top air outlets 3e ensure the uniformity of air intake and air outlet. At the same time, in terms of structural design, there is no complex mechanical structure that affects the air path of the entire device, so that the baking medium passes through the tray air holes 4c evenly, ensuring a uniform and high-quality drying effect, and also preventing blockage. The design of the flip tray 4b, the integrity of the rotating tray 4a during operation is retained, overcoming the problem of baking medium escaping from each layer of the tray, achieving the baking medium passing through each level of the tray evenly, and flipping the forced conveying of the material at the same time, ensuring that the material can be smoothly conveyed up and down. The design of the moving tray and the flip tray block 4b also makes it difficult for the tray to be blocked, and the device is not easy to pile up materials in the corner, improving the operating stability of the device. The feeding channel of the first layer adopts a baffle 1b design with a radial length of half the radius and fixed on the device housing 3a. The purpose is to make the feeding channel have fewer corners to prevent material piling, and to ensure the uniform layout of the top air outlet 3e. Such an arrangement makes the shape of the feeding port 1a easy for other equipment to access, while ensuring the stability of the feeding channel. For the feeding channel of the general layer, the baffle 3b is designed to isolate the feeding port from the discharge port before it to ensure the separation of feeding and discharging. The paddle 3c is designed to have a certain designable height from the tray of this layer. The purpose is to pave the material on the tray according to the specified thickness, ensure the uniform distribution of the material, correspond to the uniform air intake, and ensure the overall drying efficiency and drying effect. The discharge port adopts an arc-type discharge channel 5c to facilitate discharge.

Claims

1. A novel biomass continuous drying device, comprising: A uniform drying medium is introduced through the air inlet (3d) at the bottom of the drying device, and the baking medium passes through the air holes (4c) of each layer of the tray to achieve the baking medium passing through the material and flowing out through the air outlet (3e) at the top of the device; the air inlet (3d) and the air outlet (3e) are arranged to be evenly arranged around the central axis of the device; at the first layer of the drying device, the material is fed through the material inlet (1a), and falls on the first layer of the tray (4a) through the material inlet layer baffle (1b) and the material inlet layer paddle (1c) formed by the material inlet layer, and its position is located at the position where the flip tray block (4b) points clockwise to the previous block, and the material inlet layer baffle (1b) is used to prevent the material flow from being blown away and falling directly into the range of the flip tray block and directly falling into the second layer. After falling to the designated position of the tray, the driving motor (2a) drives the rotating shaft (2b) to rotate, and the rotating shaft drives the tray (4a) connected thereto to rotate clockwise in the top view, driving it The material on the tray moves clockwise, and is evenly spread on the tray through a layer of paddles (1c) at a certain height from the tray. The shaft of each flip tray block is connected to a driving flip motor fixed on the rotating shaft shell (2c), so that each time the flip tray block (4b) reaches a designated position before the baffle on the counterclockwise side, the flip motor (4e) controls the corresponding tray block (4b) to flip half a circle, so that the material in the current block area is completely dropped into the next layer. For the middle layer of the drying device, when the flip tray block (4b) on the upper layer reaches the designated position, it falls to the next layer through the current layer feed port surrounded by the baffle (3b) and the paddle (3c). At the bottom layer of the device, the material is discharged from the current layer after drying, and a discharge port is arranged between the bottom tray and the device chassis. The size of the discharge port can be adjusted and designed according to the pipe port of the equipment connected thereto, and is surrounded by the discharge port baffles (5a, 5b) and the discharge port guide plate (5c).

2. The novel biomass continuous drying device according to claim 1 is characterized in that The bottom air inlet (3d) and the top air outlet (3e) are evenly arranged in the circumferential direction.

3. The novel biomass continuous drying device according to claim 1 is characterized in that The first-layer feeding part includes: a feeding port (1a), a baffle plate (1b) at the feeding port, and a shift plate (1c) at the feeding port, which are fixed on the device housing (3a) and together form a feeding channel. The feeding port is set to be small and the baffle plate size corresponds to it. The radial length is half of the radius, forming a whole channel leading to the first-layer tray.

4. The novel biomass continuous drying device according to claim 1 is characterized in that The fan-shaped block is fixed on the rotating shaft (2b) through a flip motor (4e) and a rotating shaft support hole (2d), and rotates clockwise along the top view direction together with the rotating shaft (2b). Air holes (4c) are distributed on the fan-shaped block to realize air drying and carry the material to realize continuous drying.

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