Mixed material pretreatment system for dry-process biogas

Abstract

The utility model provides a mixing pretreatment system for dry-process biogas, and relates to the technical field of biogas production. The utility model provides a dry-process biogas mixing pretreatment system which comprises a feeding bin, a mixing pool and an auger, the feeding bin and the mixing pool are deeply excavated underground, a vibrating screen is further horizontally arranged in the feeding bin, and the horizontal height of the vibrating screen is equal to that of the ground. The mixing pretreatment system can solve the problem of low production efficiency caused by more impurities and large blocks of excrement, so that the equipment maintenance is reduced, the fermentation period is shortened, the operation efficiency and the stability of a fermentation system are improved, and the mixing pretreatment system can also be suitable for feeding in a cold environment.

Description

Technical Field

[0001] This utility model relates to the field of biogas production technology, and in particular to a mixing and pretreatment system for dry biogas. Background Technology

[0002] Biogas, also known as methane, is a product of the decomposition and metabolism of organic matter (such as straw, weeds, human and animal excrement, garbage, sludge, etc.) by various microorganisms under anaerobic conditions. Its main components are methane and nitrogen dioxide, along with small amounts of other gases such as hydrogen sulfide. The process of biogas production is also called anaerobic fermentation. Based on the total solids content, anaerobic digestion technology can be divided into wet anaerobic digestion (solids content <15%) and dry anaerobic digestion (solids content 20-40%).

[0003] Livestock and poultry manure is rich in organic matter, such as protein, inorganic matter, fat, and undigested dietary fiber, making it a common raw material for biogas production. Utilizing manure for biogas power generation and biomethane production not only effectively solves the pollution problem caused by livestock and poultry farming in rural areas but also greatly improves economic efficiency. However, due to the large amount of impurities and large lumps in livestock and poultry manure, it is difficult to process and discharge, resulting in low manure utilization and low biogas production efficiency. This is especially true in winter, when the long winters and low outdoor temperatures in northern regions cause manure to freeze easily, further reducing manure utilization and biogas production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a mixing pretreatment system for dry biogas production. This mixing pretreatment system can solve the problem of low production efficiency caused by excessive impurities and large lumps in the manure. After being processed by the mixing pretreatment system, the manure is transported to the anaerobic fermentation device, which helps to shorten the fermentation cycle and improve the operating efficiency and stability of the fermentation system, thereby solving the problems of low biogas production efficiency and low resource utilization rate from manure.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A dry biogas mixing pretreatment system includes: a feed silo and a mixing tank excavated below ground level, and an auger, wherein the feed silo and the mixing tank are connected by the auger; wherein,

[0007] The feed hopper is also equipped with a horizontally installed vibrating screen, the horizontal height of which is the same as the ground level.

[0008] The vibrating screen can separate and remove sand, gravel, and impurities from the manure, and can also crush large pieces of manure before they fall into the feed hopper to improve the utilization rate of manure. The device can also be used for manure feeding in winter, solving the problems of feeding difficulties, resource waste, and low biogas production efficiency caused by frozen manure in winter.

[0009] Furthermore, the dry biogas mixing pretreatment system also includes a lifting component, which is used to lift the material; when there are many sand and gravel impurities on the vibrating screen, the lifting component lifts the vibrating screen to remove the sand and gravel impurities on the vibrating screen.

[0010] Furthermore, the vibrating screen installed inside the feed hopper divides the feed hopper into an upper feed hopper and a lower feed hopper; the upper end of the upper feed hopper is at least 0.5m above the ground.

[0011] The lower feed hopper is dug deep underground, ensuring feeding capacity without occupying too much ground area; the upper feed hopper is set above the vibrating screen and the ground, which can increase the feeding volume at one time and prevent feces from scattering and splashing everywhere during feeding and vibrating screen vibration, thus avoiding pollution and waste of resources.

[0012] Furthermore, the outer wall of the upper feeding hopper is provided with a concrete ramp repaired with concrete, and the concrete ramp is attached to the outer wall of the upper feeding hopper.

[0013] Furthermore, the bottom of the feed hopper is configured as an inverted conical bottom, and the angle between the conical bottom and the horizontal direction is 25°.

[0014] The bottom of the feed hopper is designed with an inverted conical shape and a limited angle of 25°. Compared with a square bottom, the conical bottom and angle design help to maximize the transport of feces to the mixing tank, avoid the accumulation of feces in the feed hopper for a long time, and improve the transport efficiency.

[0015] Furthermore, the inlet end of the auger is inclined into the feed hopper along the inverted conical bottom and contacts the bottom of the feed hopper; the outlet end is away from the feed hopper and is located at the upper end of the mixing tank.

[0016] A motor is installed on the auger. When the motor rotates, the manure in the feed hopper enters the auger from the inlet end and is discharged from the outlet end of the auger through the rotation of the auger shaft, thus entering the mixing tank for storage.

[0017] During the auger conveying process, the rotation of the auger shaft can further pulverize the manure, thereby helping to shorten the fermentation cycle and improve the operating efficiency and stability of the fermentation system.

[0018] Compared with the prior art, the beneficial effects of this utility model include at least one of the following:

[0019] 1. The dry biogas mixing pretreatment system provided by this utility model can solve the problem of low production efficiency caused by many impurities and large lumps in the manure. The manure after being treated by the mixing pretreatment system is transported to the anaerobic fermentation device, which helps to reduce equipment maintenance, shorten the fermentation cycle, and improve the operating efficiency and stability of the fermentation system, thereby solving the problems of low biogas production efficiency and low resource utilization rate from manure. The mixing pretreatment system can also achieve good feeding in winter.

[0020] 2. A vibrating screen is installed in the feed hopper to separate and remove sand, gravel and impurities from the feces, and to crush large pieces of feces, thereby improving the utilization rate of feces.

[0021] 3. The feeding hopper is set up as an upper feeding hopper and a lower feeding hopper. This ensures the feeding capacity without occupying too much ground area. It also prevents the manure from scattering and splashing everywhere during feeding and the vibration of the vibrating screen, thus avoiding pollution and waste of resources.

[0022] 4. The bottom of the feed hopper is designed with an inverted cone shape and a limited angle, which helps to maximize the transport of feces to the mixing tank, avoids the accumulation of feces in the feed hopper for a long time, and improves the transport efficiency.

[0023] 5. The auger conveys the feces, achieving efficient transportation while further pulverizing the feces. Attached Figure Description

[0024] Figure 1 This is a top view of the dry biogas mixing and pretreatment system of this utility model;

[0025] Figure 2 This is a front view of the dry biogas mixing and pretreatment system of this utility model.

[0026] Explanation of reference numerals in the attached diagram: Feed hopper-1, Screwdriver-2, Mixing tank-3, Vibrating screen-4, Upper feed hopper-11, Lower feed hopper-12. Detailed Implementation

[0027] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0028] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0029] Furthermore, it should be understood in the description of this utility model that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] like Figure 1 and Figure 2 As shown, this utility model provides a dry biogas mixing pretreatment system, including: a feed silo 1 and a mixing tank 3 dug deep below ground level, and an auger 2, wherein the feed silo 1 and the mixing tank 3 are connected by the auger 2.

[0033] Furthermore, a vibrating screen 4 is horizontally installed inside the feed hopper 1, and the horizontal height of the vibrating screen 4 is the same as the horizontal height of the ground.

[0034] The vibrating screen can separate and remove sand, gravel and impurities from the manure, and can also crush large pieces of manure into powder before they fall into the feed hopper, thereby improving the utilization rate of manure. The device can also be used for manure feeding in winter, solving the problems of feeding difficulties, resource waste and low biogas production efficiency caused by frozen manure in winter.

[0035] Furthermore, the dry biogas mixing pretreatment system also includes a lifting component (not shown in the figure), which is used to lift the material; when there are a lot of sand and gravel impurities on the vibrating screen, the lifting component lifts the vibrating screen to remove the sand and gravel impurities.

[0036] Furthermore, the vibrating screen 4 installed inside the feed hopper 1 divides the feed hopper 1 into an upper feed hopper 11 and a lower feed hopper 12; the upper end of the upper feed hopper 11 is at least 0.5m above the ground.

[0037] The lower feed hopper is dug deep underground, ensuring feeding capacity without occupying too much ground area; the upper feed hopper is set above the vibrating screen and the ground, which can increase the feeding volume at one time and prevent feces from scattering and splashing everywhere during feeding and vibrating screen vibration, thus avoiding pollution and waste of resources.

[0038] Furthermore, the upper outer wall of the feed hopper 11 is provided with a concrete ramp repaired with concrete, and the concrete ramp is attached to the outer wall of the upper feed hopper 11.

[0039] Furthermore, the bottom of the feed hopper 1 is configured as an inverted conical bottom, and the angle between the conical bottom and the horizontal direction is 25°.

[0040] The bottom of the feed hopper is designed with an inverted conical shape and a limited angle of 25°. Compared with a square bottom, the conical bottom and angle design help to maximize the transport of feces to the mixing tank, avoid the accumulation of feces in the feed hopper for a long time, and improve the transport efficiency.

[0041] Furthermore, the inlet end of the auger 2 is inclined into the feed hopper 1 along the inverted conical bottom and contacts the bottom of the feed hopper 1; the outlet end is away from the feed hopper and is located at the upper end of the mixing tank 3.

[0042] A motor is installed on the auger. When the motor rotates, the manure in the feed hopper enters the auger from the inlet end and is discharged from the outlet end of the auger through the rotation of the auger shaft, thus entering the mixing tank for storage.

[0043] During the auger conveying process, the rotation of the auger shaft can further pulverize the manure, thereby helping to shorten the fermentation cycle and improve the operating efficiency and stability of the fermentation system.

[0044] The above description of the embodiments is provided to enable those skilled in the art to understand and use the utility model. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present utility model is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present utility model without departing from its scope should be within the protection scope of the present utility model.

Claims

1. A mixing and pretreatment system for dry biogas, characterized in that, include: A feeding silo (1) and a mixing tank (3) are excavated deep below ground level, along with an auger (2), wherein the feeding silo (1) and the mixing tank (3) are connected by the auger (2); wherein, A vibrating screen (4) is also horizontally installed inside the feed hopper (1), and the horizontal height of the vibrating screen (4) is the same as the horizontal height of the ground.

2. The dry biogas mixing pretreatment system according to claim 1, characterized in that, The vibrating screen (4) installed in the feed hopper (1) divides the feed hopper (1) into an upper feed hopper (11) and a lower feed hopper (12).

3. The dry biogas mixing pretreatment system according to claim 2, characterized in that, The outer wall of the upper feeding hopper (11) is provided with a concrete ramp repaired by concrete, and the concrete ramp is attached to the outer wall of the upper feeding hopper (11).

4. The dry biogas mixing pretreatment system according to claim 1, characterized in that, The bottom of the feed hopper (1) is set in an inverted conical shape.

5. The dry biogas mixing pretreatment system according to claim 4, characterized in that, The angle between the conical base and the horizontal direction is 25°.

6. The dry biogas mixing pretreatment system according to claim 1, characterized in that, The inlet end of the auger is inclined into the feed hopper along the inverted conical bottom and contacts the bottom of the feed hopper; the outlet end is away from the feed hopper and is located at the top of the mixing tank.

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