Automatic deslagging system of biomass gasifier

Abstract

The automatic deslagging system comprises an ash chamber, ash cutters, a rotating shaft, a spiral conveying device, a cooling device and a first motor driving device, the rotating shaft is arranged in the center of the ash chamber, the multiple ash cutters are arranged on the rotating shaft and arranged at intervals in the length direction of the rotating shaft, and the spiral conveying device is arranged on the rotating shaft. The rotary shaft is in transmission connection with a first motor driving device arranged outside the ash chamber, the cooling device is a water cooling jacket arranged on the peripheral side of the ash chamber in a wrapping mode, and a feeding port of the spiral conveying device is connected with the bottom of the ash chamber. And not only is the operation safety of the gasification furnace guaranteed, but also the service life of equipment is greatly prolonged, and the deslagging efficiency is greatly improved.

Description

Technical Field

[0001] This application relates to the field of biomass gasification furnace technology, specifically to an automatic slag discharge system for a biomass gasification furnace. Background Technology

[0002] Biomass gasification furnaces are environmental protection devices widely used in the treatment of biomass solid waste such as agricultural waste, garden waste, and domestic waste. This equipment utilizes the principle of pyrolysis gasification to decompose biomass solid waste at high temperatures under anaerobic conditions, producing biomass gas and ash.

[0003] In existing technologies, although the slag discharge device of the gasifier is equipped with a slag discharge port, it has the following shortcomings:

[0004] 1. The ash chamber has a single function, only collecting ash and slag. Lacking a dedicated cooling mechanism, it can only rely on the natural cooling of the ash and slag before slag removal, a time-consuming process that severely impacts the overall efficiency of the gasifier.

[0005] 2. The ash chamber of a gasifier is typically quite small, making it impossible to store large amounts of ash for extended periods. This prevents timely cleaning of the ash discharge port before it has fully cooled, further complicating ash removal. Moreover, after undergoing the complex process of pyrolysis and gasification, the properties of biomass change, making it prone to agglomeration. These agglomerates easily accumulate at the ash discharge port, clogging it and further reducing ash removal efficiency. This not only affects the stable operation of the gasifier but may also lead to equipment malfunctions, increasing maintenance costs, and hindering the continuity and efficiency of biomass solid waste treatment.

[0006] 3. Traditional slag removal systems are mostly manual or partially mechanically driven, resulting in low efficiency, high labor intensity, poor stability and reliability, and low safety. Summary of the Invention

[0007] Therefore, this application provides an automatic slag discharge system for a biomass gasifier to solve the above-mentioned problems existing in the prior art.

[0008] To achieve the above objectives, this application provides the following technical solution:

[0009] An automatic ash removal system for a biomass gasifier includes an ash chamber, ash knives, a rotating shaft, a screw conveyor, a cooling device, and a first motor drive. The rotating shaft is located at the center of the ash chamber, and multiple ash knives are arranged on the rotating shaft at intervals along the length of the rotating shaft. The rotating shaft is connected to the first motor drive located outside the ash chamber. The cooling device is a water-cooled jacket covering the periphery of the ash chamber. The feed inlet of the screw conveyor is connected to the bottom of the ash chamber.

[0010] Furthermore, it also includes a dust baffle plate, which is fixed to the circumference of the rotating shaft, and the height of the dust baffle plate corresponds to the height of the feed inlet of the screw conveyor.

[0011] Furthermore, there are three dust baffles, which are evenly distributed around the circumference of the rotation axis.

[0012] Furthermore, the ash chamber is inverted cone shape.

[0013] Furthermore, there are two gray knives.

[0014] Furthermore, a water inlet is provided at the bottom of the cooling device, and a water outlet is provided at the top of the cooling device.

[0015] Furthermore, the screw conveyor includes a sealed conveying pipe, a shafted screw, a second motor drive device, and an ash outlet. One end of the sealed conveying pipe is connected to the ash chamber, and the other end is fixed with the second motor drive device. The shafted screw is rotatably disposed inside the sealed conveying pipe and is connected to the second motor drive device for transmission. The ash outlet is disposed on the side of the sealed conveying pipe near the second motor drive device, and a flange is provided at the end of the ash outlet.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] 1. This utility model provides a cooling device for the ash chamber, employing an indirect cooling method using circulating water. This method significantly accelerates the cooling rate of ash and slag, shortens the cooling time, and improves the continuous operation capability of the gasifier. The cooling device also possesses excellent heat conduction performance, enabling uniform cooling of the ash and slag, preventing localized overheating, effectively reducing the temperature of the ash chamber wall, alleviating thermal stress, reducing material aging and damage caused by high temperatures, extending the service life of the ash chamber, and significantly reducing equipment maintenance costs and replacement frequency.

[0018] 2. The placement of ash cutters at different heights allows for comprehensive crushing of agglomerated ash, ensuring that the ash outlet is not blocked by clumps. The rotational motion of the rotating shaft enables the ash to be discharged more smoothly under the combined influence of gravity and the force of the ash cutters, improving the space utilization of the ash chamber and further enhancing the processing capacity of the gasifier.

[0019] 3. The screw conveyor is horizontally connected to the bottom of the ash chamber. This screw structure allows for a more stable and smoother transport of ash. It can adapt to ash of different particle sizes and moisture content, effectively preventing leakage and accumulation of ash during transport and ensuring a smooth transfer of ash from the ash chamber to subsequent processing stages.

[0020] 4. The motor drive device has a higher degree of automation, good stability and overload protection capabilities, reduces the risk of human error, improves the safety of equipment operation, and ensures the stable operation of the slag discharge system. Attached Figure Description

[0021] To more intuitively illustrate the prior art and this application, exemplary drawings are provided below. It should be understood that the specific shapes and structures shown in the drawings should not generally be regarded as limiting conditions for implementing this application; for example, based on the technical concept disclosed in this application and the exemplary drawings, those skilled in the art are able to easily make conventional adjustments or further optimizations to the addition / reduction / classification, specific shapes, positional relationships, connection methods, size ratios, etc. of certain units (components).

[0022] Figure 1 A cross-sectional view of an automatic slag removal system for a biomass gasifier provided in this application embodiment;

[0023] Figure 2 This is a top view of an automatic slag discharge system for a biomass gasifier provided in an embodiment of this application.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Ash chamber; 2. Ash knife; 3. Rotating shaft; 4. Ash baffle; 5. Screw conveyor; 6. Ash outlet; 7. Cooling device; 8. Water inlet; 9. Water outlet; 10. First motor drive device; 11. Second motor drive device. Detailed Implementation

[0026] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] Example 1

[0028] like Figures 1-2 As shown, this embodiment provides an automatic ash removal system for a biomass gasification furnace, including an ash chamber 1, ash blades 2, a rotating shaft 3, a screw conveyor 5, a cooling device 7, and a first motor drive device 10. The ash chamber 1 is inverted conical in shape. The inverted conical structure can improve the fluidity of the ash and reduce the adhesion of ash and slag to the inner wall of the ash chamber, making it easier for the ash and slag to fall and preventing the accumulation of ash and slag in dead corners. A rotating shaft 3 is set at the center of the ash chamber 1, and multiple ash blades 2 are set on the rotating shaft 3. The multiple ash blades 2 are arranged at intervals along the length of the rotating shaft 3. The rotating shaft 3 is connected to the first motor drive device 10 located outside the ash chamber 1. More specifically, the ash blades 2 are two fan-shaped blades. As the rotating shaft 3 rotates, the upper and lower layers of ash blades 2 begin to rotate, thereby breaking up the clumps of ash and slag in the ash chamber and promoting the smooth discharge of ash and slag. The cooling device 7 is a water-cooled jacket surrounding the ash chamber 1. The cooling device 7 has an inlet 8 at its lower part and an outlet 9 at its upper part. The cooling water circulates, absorbing heat emitted from the inner wall of the ash chamber 1, thereby reducing the temperature of the ash and preventing damage to the equipment from high temperatures. The feed inlet of the screw conveyor 5 is connected to the bottom of the ash chamber 1.

[0029] The working principle of this embodiment is as follows: During the biomass gasification process, the generated ash falls into the inverted conical ash chamber 1. After the first motor drive device 10 is started, it drives the ash cutter 2 to rotate via the rotating shaft 3. During the rotation, the ash cutter 2 not only pushes the ash towards the bottom of the ash chamber 1, but also effectively breaks up the clumps of ash, preventing blockage. The broken ash is continuously conveyed out by the screw conveyor 5. At the same time, the cooling device 7 operates continuously to ensure that the ash chamber 1 and the ash inside are maintained within a safe operating temperature range.

[0030] Example 2

[0031] This embodiment provides an automatic slag removal system for a biomass gasifier, the structure of which includes all the contents of Embodiment 1. Only the different parts are described below.

[0032] like Figures 1-2 As shown, this embodiment also includes a dust baffle 4, which is fixed to the circumference of the rotating shaft 3. The height of the dust baffle 4 corresponds to the height of the feed inlet of the screw conveyor 5. More specifically, there are three dust baffles 4, which are evenly distributed around the circumference of the rotating shaft 3. When the system starts and the rotating shaft 3 begins to rotate under the drive of the first motor drive device 10, the dust baffles 4 also rotate synchronously. Since the height of the dust baffle 4 corresponds to the height of the feed inlet of the screw conveyor 5, as it rotates, it can effectively sweep up the ash and slag falling at the bottom of the ash chamber 1 and send it into the screw conveyor 5. The feed inlet of the screw conveyor 5 is connected to the bottom of the ash chamber 1, and the discharge outlet of the screw conveyor 5 is fixed with a second motor drive device 11. The ash outlet 6 is located on one side of the second motor drive device 11. When the system is running, the second motor drive device 11 drives the rotation of the shafted screw in the screw conveyor 5, so that the ash and slag entering the screw conveyor 5 can move smoothly towards the ash outlet 6.

[0033] The ash outlet 6 is equipped with a flange. When the airtightness of the gasifier needs to be ensured, a valve can be connected to the flange and closed. In this way, the gas inside the gasifier will not leak from the ash outlet 6 during operation, ensuring the safety and stability of the entire gasification process. When ash discharge is required, simply open the valve, and the ash will fall from the ash outlet 6 under the action of the screw conveyor 5, completing the ash discharge operation. This design makes the entire ash discharge system not only highly efficient in ash discharge but also able to ensure the airtightness of the gasifier when needed, greatly improving the operating efficiency and stability of the biomass gasifier.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

Claims

1. An automatic ash removal system for a biomass gasification furnace, characterized in that, It includes an ash chamber (1), an ash knife (2), a rotating shaft (3), a screw conveyor (5), a cooling device (7), and a first motor drive device (10); The ash chamber (1) is provided with a rotating shaft (3) at its center, and a plurality of ash knives (2) are provided on the rotating shaft (3). The plurality of ash knives (2) are arranged at intervals along the length direction of the rotating shaft (3). The rotating shaft (3) is connected to the first motor drive device (10) located outside the ash chamber (1); The cooling device (7) is a water-cooled jacket that covers and is disposed around the ash chamber (1); The feed inlet of the screw conveyor (5) is connected to the bottom of the ash chamber (1).

2. The automatic ash discharge system for a biomass gasifier according to claim 1, characterized in that, It also includes a dust baffle (4), which is fixed to the circumference of the rotating shaft (3), and the height of the dust baffle (4) corresponds to the height of the feed inlet of the screw conveyor (5).

3. The automatic slag discharge system for a biomass gasifier according to claim 2, characterized in that, There are 3 dust baffles (4), and the 3 dust baffles (4) are evenly distributed around the circumference of the rotation axis (3).

4. The automatic ash removal system for a biomass gasifier according to claim 1, characterized in that, The ash chamber (1) is inverted cone shape.

5. The automatic ash removal system for a biomass gasifier according to claim 1, characterized in that, There are two gray knives (2).

6. The automatic ash discharge system for a biomass gasifier according to claim 1, characterized in that, The cooling device (7) is provided with a water inlet (8) at the bottom and a water outlet (9) at the top.

7. The automatic ash discharge system for a biomass gasifier according to claim 1, characterized in that, The screw conveyor (5) includes a sealed conveying pipe, a shafted screw, a second motor drive device (11), and an ash outlet (6). One end of the sealed conveying pipe is connected to the ash chamber (1), and the other end is fixed to the second motor drive device (11). The shafted screw is rotatably disposed inside the sealed conveying pipe and is connected to the second motor drive device (11) for transmission. The ash outlet (6) is disposed on the side of the sealed conveying pipe near the second motor drive device (11), and a flange is provided at the end of the ash outlet (6).

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