Dry anaerobic feeding, mixing, inoculating and uniform distributing system

Abstract

The invention provides a dry anaerobic feeding, mixing, inoculating and uniform distributing system which is provided with a mixing and stirring device, a pulse distributing device and an anaerobic fermentation device, the mixing and stirring device is provided with a raw material inlet, a returned material inlet and a mixed material outlet, and the mixing and stirring device is used for mixing raw materials and returned materials; the pulse material distribution device is communicated with the mixture outlet and the anaerobic fermentation device and is used for feeding the mixture discharged from the mixture outlet into the anaerobic fermentation device, the anaerobic fermentation device is used for performing anaerobic fermentation on the mixture, raw materials and returned materials are mixed in the mixing and stirring device, and the mixed materials and the returned materials are fed into the pulse material distribution device. At the moment, the aerobic environment in the mixing and stirring device can accelerate strain domestication, and the reaction efficiency after the raw materials enter the tank is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fermentation, in particular to a dry anaerobic feeding, mixing, inoculation and uniform distribution system. Background Art

[0002] Anaerobic fermentation technology has been used to treat organic waste for many years, but its large-scale industrial application did not begin until the early 20th century in Europe. It was not until the 1970s that anaerobic fermentation technology was well developed in Europe, and most of the organic waste in Europe was treated with anaerobic technology. The development of anaerobic treatment of organic waste in my country was relatively late. With the promotion of the classification of kitchen waste and domestic waste, anaerobic projects have gradually increased, and advanced anaerobic technologies from abroad have also been introduced into China.

[0003] Anaerobic technology is divided into two categories: dry anaerobic and wet anaerobic. The essential difference lies in the difference in the total solid concentration (i.e. solid content) of the material in the anaerobic tank. Generally, when the solid content of the material is greater than 20%, it is mostly in a non-flowing state. Anaerobic digestion in this state is mostly dry anaerobic. When the solid content is less than 20%, most materials are in a flowing or semi-flowing state, which is mostly wet anaerobic digestion. Compared with wet anaerobic, dry anaerobic has the following advantages: less biogas slurry production, strong raw material adaptability, high gas production per unit volume, and small footprint.

[0004] At present, most of the domestic dry anaerobic technologies are imported from abroad. The feeding forms of anaerobic tanks of various dry anaerobic technologies mainly include plunger pump feeding and screw feeding. From the analysis of many project application cases, the feeding form of dry anaerobic tanks has become the main section that affects the normal and efficient operation of dry anaerobic systems. The existing feeding forms of dry anaerobic tanks mainly have the following problems: It is necessary to carry out bacterial strain domestication in the front section of the anaerobic tank, and this anaerobic process affects the anaerobic fermentation efficiency. Summary of the invention

[0005] In view of this, it is necessary to provide a dry anaerobic feed mixing inoculation and uniform distribution system, which can solve the problem that strain domestication affects anaerobic fermentation efficiency.

[0006] The present invention provides a dry anaerobic feeding, mixing, inoculating and uniformly distributing system, comprising: a mixing and stirring device, which is provided with a raw material inlet for raw materials to enter, a return material inlet for return materials to enter and a mixed material outlet for mixed materials to be discharged, and the mixing and stirring device is used to mix raw materials and return materials. Anaerobic fermentation device, used for anaerobic fermentation of mixed materials, and a pulse material distribution device, which is connected to the mixture outlet and the anaerobic fermentation device and is used for delivering the mixture discharged from the mixture outlet into the anaerobic fermentation device.

[0007] Optionally, the mixing and stirring device includes a mixing tank and an atomizing assembly. The upper end of the mixing tank is provided with the raw material inlet and the return material inlet, the bottom of the mixing tank is provided with the mixed material outlet, and the atomizing assembly is fixed on the mixing tank and corresponds to the return material inlet, and is used to atomize the return material and send it into the mixing tank.

[0008] Optionally, the atomization assembly includes an atomization gun head, a compressed air pipe and a compressed air tank, the atomization gun head is connected to the compressed air pipe and a return material feeding pipe, and the compressed air tank is connected to the compressed air pipe.

[0009] Optionally, an interlayer is formed in the shell of the mixing tank, and a hot water inlet and a hot water outlet connected to the interlayer are provided on the mixing tank.

[0010] Optionally, a stirring component is also included, which is fixed on the mixing tank and partially extends into the mixing tank to stir the materials in the mixing tank.

[0011] Optionally, the stirring assembly includes a driving motor, a first rotating shaft, a second rotating shaft, a first blade and a second blade. The driving motor is fixed on the mixing tank. The driving end of the driving motor extends into the mixing tank and is transmission-connected to the first rotating shaft and the second rotating shaft. The first blade and the second blade are respectively fixed on the first rotating shaft and the second rotating shaft, and the first blade and the second blade are staggered with each other.

[0012] Optionally, the first rotating shaft, the second rotating shaft, the first blade, and the second blade are hollow inside for filling with hot water.

[0013] Optionally, the mixing and stirring device further comprises a material buffer bin, a top of the material buffer bin is provided with a feed inlet connected to the mixed material outlet, and a bottom of the material buffer bin is provided with a discharge outlet connected to the pulse distribution device.

[0014] Optionally, the pulse distribution device includes a delivery pump, a delivery main pipeline, and a plurality of delivery sub-pipelines. The delivery pump is connected to the mixing and stirring device and the delivery main pipeline. A portion of the delivery main pipeline extends into the anaerobic fermentation device. A plurality of delivery sub-pipelines are connected to the portion of the delivery main pipeline located in the anaerobic fermentation device at intervals, and the other end of the delivery sub-pipeline is an open end.

[0015] Optionally, the delivery auxiliary pipeline is further provided with a pressure sensor, and one side of the delivery auxiliary pipeline is extended to form a flushing pipeline, and the flushing pipeline is provided with a manual gate valve.

[0016] The beneficial effects of the present invention are: In the present invention, a mixing and stirring device, a pulse feeding device and an anaerobic fermentation device are provided. The mixing and stirring device is provided with a raw material inlet, a return material inlet and a mixture outlet. The mixing and stirring device is used to mix the raw material and the return material; the pulse feeding device is connected to the mixture outlet and the anaerobic fermentation device, and is used to send the mixture discharged from the mixture outlet into the anaerobic fermentation device, and the anaerobic fermentation device is used to perform anaerobic fermentation on the mixture; the raw material and the return material are mixed to achieve pre-mixing and inoculation of the raw material. At this time, the mixing and stirring device has an aerobic environment, which can accelerate the domestication of the strains and improve the reaction efficiency after the raw material enters the tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a structural schematic diagram of the dry anaerobic feeding, mixing, inoculation and uniform distribution system of the present invention; Figure 2 It is a schematic diagram of the enlarged structure at the mixing tank; Figure 3 is a schematic cross-sectional view of a mixing tank; Figure 4 It is a structural schematic diagram of the secondary conveying pipeline; Among them: 1-mixing and stirring device, 11-raw material inlet, 12-return material inlet, 13-mixed material outlet, 14-mixing tank, 15-atomizing component, 151-atomizing gun head, 152-compressed air pipe, 153-compressed air tank, 16-stirring component, 161-first rotating shaft, 162-second rotating shaft, 163-first blade, 164-second blade, 17-material buffer bin, 2-pulse material distribution device, 21-delivery pump, 22-delivery main pipeline, 23-delivery auxiliary pipeline, 24-solenoid valve, 25-pressure sensor, 26-flushing pipeline, 27-manual gate valve, 3-anaerobic fermentation device. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of this application and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0020] like Figure 1-4As shown, an embodiment of the present invention provides a dry anaerobic feeding mixing inoculation and uniform distribution system, which includes: a mixing and stirring device 1, a pulse distribution device 2 and an anaerobic fermentation device 3, the mixing and stirring device 1 is provided with a raw material inlet 11, a return material inlet 12 and a mixture outlet 13, the mixing and stirring device 1 is used to mix the raw material and the return material; the pulse distribution device 2 is connected to the mixture outlet 13 and the anaerobic fermentation device 3, and is used to send the mixture discharged from the mixture outlet 13 into the anaerobic fermentation device 3, and the anaerobic fermentation device 3 is used to perform anaerobic fermentation on the mixture.

[0021] In the present invention, a mixing and stirring device 1, a pulse feeding device 2 and an anaerobic fermentation device 3 are provided. The mixing and stirring device 1 is provided with a raw material inlet 11, a return material inlet 12 and a mixture outlet 13. The mixing and stirring device 1 is used to mix the raw material and the return material; the pulse feeding device 2 is connected to the mixture outlet 13 and the anaerobic fermentation device 3, and is used to send the mixture discharged from the mixture outlet 13 into the anaerobic fermentation device 3, and the anaerobic fermentation device 3 is used to perform anaerobic fermentation on the mixture; the raw material and the return material are mixed to achieve pre-mixing and inoculation of the raw material. At this time, the mixing and stirring device 1 has an aerobic environment, which can accelerate the domestication of the strains and improve the reaction efficiency after the raw material enters the tank.

[0022] Specifically, the mixing and stirring device 1 further includes a mixing tank 14 and an atomizing assembly 15. The upper end of the mixing tank 14 is provided with the raw material inlet 11 and the return material inlet 12. The bottom of the mixing tank 14 is provided with the mixed material outlet 13. The atomizing assembly 15 is fixed on the mixing tank 14 and corresponds to the return material inlet 12, and is used to atomize the return material and send it into the mixing tank 14. The atomized return material can contact the raw material more evenly, thereby improving the mixing efficiency of the two.

[0023] Furthermore, the atomizing assembly 15 includes an atomizing gun head 151, a compressed air pipe 152 and a compressed air tank 153. The atomizing gun head 151 is connected to the compressed air pipe 152 and the return material feeding pipe, and the compressed air tank 153 is connected to the compressed air pipe 152. Compressed air and return material are sprayed out through the atomizing gun head 151 to form atomization.

[0024] Specifically, an interlayer is formed in the shell of the mixing tank 14, and a hot water inlet and a hot water outlet connected to the interlayer are provided on the mixing tank 14. Hot water is poured into the interlayer through the hot water inlet and the hot water outlet to heat the inside of the mixing tank 14, so that the raw materials and the return materials are heated in advance, thereby solving the problem that the material temperature is greatly affected on the ambient temperature in the tank after being directly sent to the anaerobic fermentation device 3 at a low temperature.

[0025] Specifically, the mixing and stirring device 1 further includes a stirring component 16 , which is fixed on the mixing tank 14 and partially extends into the mixing tank 14 for stirring the material in the mixing tank 14 .

[0026] Furthermore, the stirring assembly 16 includes a driving motor, a first rotating shaft 161, a second rotating shaft 162, a first blade 163 and a second blade 164. The driving motor is fixed on the mixing tank 14, and the driving end of the driving motor extends into the mixing tank 14 and is transmission-connected to the first rotating shaft 161 and the second rotating shaft 162. The first blade 163 and the second blade 164 are respectively fixed on the first rotating shaft 161 and the second rotating shaft 162, and the first blade 163 and the second blade 164 are staggered with each other.

[0027] Furthermore, the first rotating shaft 161, the second rotating shaft 162, the first blade 163 and the second blade 164 are hollow inside for pouring hot water. The purpose of this design is to heat the inside of the mixing tank 14, so that the raw materials and the return materials are heated in advance, thereby solving the problem that the low temperature of the material directly sent to the anaerobic fermentation device 3 has a greater impact on the ambient temperature in the tank.

[0028] Specifically, the mixing and stirring device 1 further includes a material buffer bin 17, a feed port connected to the mixed material outlet 13 is provided at the top of the material buffer bin 16, and a discharge port connected to the pulse material distribution device 2 is provided at the bottom of the material buffer bin 16. The function of the material buffer bin 17 is to buffer the mixed materials.

[0029] Specifically, the pulse material distribution device 2 includes a delivery pump 21, a delivery main pipeline 22, and a plurality of delivery sub-pipes 23. The delivery pump 21 is connected to the mixing and stirring device 1 and the delivery main pipeline 22. The delivery main pipeline 22 partially extends into the anaerobic fermentation device 3. The plurality of delivery sub-pipes 23 are connected to the portion of the delivery main pipeline 22 located in the anaerobic fermentation device 3 at intervals. The other end of the delivery sub-pipe 23 is an open end. The delivery pump 21 delivers the mixed material to the delivery main pipeline 22, and sprays it at various positions in the anaerobic fermentation device 3 through the delivery sub-pipes 23. The purpose of this design is that dry anaerobic materials have the characteristics of high solid content and relatively weak fluidity. The existing feed is mostly single-point feed, and the cross-section of the anaerobic tank is large, which leads to poor homogenization effect of the raw materials after entering the anaerobic tank. The delivery sub-pipe 23 can achieve feed uniformity and improve the homogeneity of the feed end of the anaerobic tank.

[0030] Furthermore, the pulse material distribution device 2 also includes a solenoid valve 24 corresponding to the conveying secondary pipeline 23 . The solenoid valve 24 is arranged on the conveying secondary pipeline 23 to control the conduction and cutoff of the conveying secondary pipeline 23 .

[0031] Furthermore, a pressure sensor 25 is provided on the secondary conveying pipeline 23 , and the pressure sensor 25 is used to detect the pressure in the secondary conveying pipeline 23 , and to determine whether the secondary conveying pipeline 23 is blocked by materials.

[0032] Furthermore, one side of the conveying secondary pipeline 23 extends to form a flushing pipeline 26, and a manual gate valve 27 is provided on the flushing pipeline 25. When it is determined that material blockage occurs in the conveying secondary pipeline 23, the manual gate valve 27 is opened, and liquid is introduced into the flushing pipeline 26 to clear it.

[0033] When in use, when the original material is dropped to the raw material inlet 11 of the mixing and stirring device 1 through the front conveying device, at the same time, the reflux material is sent to the reflux material atomizing gun head 151 through the front conveying device, and the reflux material is atomized by the compressed air at the atomizing gun head 151, and the atomized reflux material and the original material are mixed in the mixing tank 14. During the mixing process of the materials, the first rotating shaft 161, the second rotating shaft 162 and the interlayer of the shell are filled with hot water, and the hot water indirectly heats the mixed material, raising the material temperature to the temperature in the anaerobic fermentation tank (medium temperature anaerobic (35±1°C) and high temperature anaerobic (55±1°C)). In this process, the original material and the reflux material are completely mixed (i.e., the inoculation process is realized), and the temperature of the mixed material is adjusted to be basically consistent with the temperature in the anaerobic fermentation tank. Afterwards, the mixed constant temperature material falls into the material buffer bin 17 below, the lower part of the material buffer bin 17 is connected to the feed port of the delivery pump 21, and the outlet of the delivery pump 21 is connected to the delivery main pipeline 22. Thanks to the delivery pump 21, the mixed constant temperature material is delivered to the delivery sub-pipeline 23 through the delivery main pipeline 22. The delivery sub-pipelines 23 are distributed on the feed side of the anaerobic fermentation tank 3. The solenoid valve 24 is controlled by the conventional control logic software written in advance, so that the uniform distribution of each delivery sub-pipeline 23 can be achieved. A pressure sensor 25 is provided on the delivery sub-pipeline 23. When the pressure sensor 25 shows that the pressure exceeds the set critical value, it means that the delivery sub-pipeline 23 is blocked to a certain extent. At this time, the blocked delivery sub-pipeline 23 can be cleared through the flushing pipeline 26 provided on the delivery sub-pipeline 23.

[0034] The beneficial effects of the present invention are: In the present invention, a mixing and stirring device, a pulse feeding device and an anaerobic fermentation device are provided. The mixing and stirring device is provided with a raw material inlet, a return material inlet and a mixture outlet. The mixing and stirring device is used to mix the raw material and the return material; the pulse feeding device is connected to the mixture outlet and the anaerobic fermentation device, and is used to send the mixture discharged from the mixture outlet into the anaerobic fermentation device, and the anaerobic fermentation device is used to perform anaerobic fermentation on the mixture; the raw material and the return material are mixed to achieve pre-mixing and inoculation of the raw material. At this time, the mixing and stirring device has an aerobic environment, which can accelerate the domestication of the strains and improve the reaction efficiency after the raw material enters the tank.

[0035] The above are only preferred specific implementations of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A dry anaerobic feeding, mixing, inoculation and uniform distribution system, characterized in that: include: The mixing and stirring device is provided with a raw material inlet for raw materials to enter, a return material inlet for return materials to enter, and a mixed material outlet for mixed materials to be discharged. The mixing and stirring device is used to mix the raw materials and the return materials. Anaerobic fermentation device, used for anaerobic fermentation of mixed materials, and a pulse material distribution device, which is connected to the mixture outlet and the anaerobic fermentation device and is used for delivering the mixture discharged from the mixture outlet into the anaerobic fermentation device.

2. The dry anaerobic feeding, mixing, inoculation and uniform distribution system according to claim 1, characterized in that: The mixing and stirring device includes a mixing tank and an atomizing assembly. The upper end of the mixing tank is provided with the raw material inlet and the return material inlet, and the bottom of the mixing tank is provided with the mixed material outlet. The atomizing assembly is fixed on the mixing tank and corresponds to the return material inlet, and is used to atomize the return material and send it into the mixing tank.

3. The dry anaerobic feeding, mixing, inoculation and uniform distribution system as claimed in claim 2, characterized in that: The atomizing assembly comprises an atomizing gun head, a compressed air pipe and a compressed air tank. The atomizing gun head is connected to the compressed air pipe and a return material feeding pipe, and the compressed air tank is connected to the compressed air pipe.

4. The dry anaerobic feeding, mixing, inoculation and uniform distribution system according to claim 2, characterized in that: An interlayer is formed in the shell of the mixing tank, and a hot water inlet and a hot water outlet communicated with the interlayer are provided on the mixing tank.

5. The dry anaerobic feeding, mixing, inoculation and uniform distribution system as claimed in claim 2, characterized in that: It also includes a stirring component, which is fixed on the mixing tank and partially extends into the mixing tank to stir the materials in the mixing tank.

6. The dry anaerobic feeding, mixing, inoculation and uniform distribution system according to claim 2, characterized in that: The stirring assembly includes a driving motor, a first rotating shaft, a second rotating shaft, a first blade and a second blade. The driving motor is fixed on the mixing tank. The driving end of the driving motor extends into the mixing tank and is transmission-connected to the first rotating shaft and the second rotating shaft. The first blade and the second blade are respectively fixed on the first rotating shaft and the second rotating shaft, and the first blade and the second blade are staggered with each other.

7. The dry anaerobic feeding, mixing, inoculating and uniform distribution system according to claim 6, characterized in that: The first rotating shaft, the second rotating shaft, the first blade and the second blade are hollow inside and are used to be filled with hot water.

8. The dry anaerobic feeding, mixing, inoculation and uniform distribution system according to claim 1, characterized in that: The mixing and stirring device also includes a material buffer bin, a top of which is provided with a feed inlet connected to the mixed material outlet, and a bottom of which is provided with a discharge outlet connected to the pulse material distribution device.

9. The dry anaerobic feeding, mixing, inoculating and uniform distribution system according to claim 1, characterized in that: The pulse material distribution device includes a delivery pump, a delivery main pipeline, and a plurality of delivery sub-pipelines. The delivery pump is connected to the mixing and stirring device and the delivery main pipeline. The delivery main pipeline partially extends into the anaerobic fermentation device. A plurality of delivery sub-pipelines are connected to the portion of the delivery main pipeline located in the anaerobic fermentation device at intervals, and the other end of the delivery sub-pipeline is an open end.

10. The dry anaerobic feeding, mixing, inoculating and uniform distribution system according to claim 9, characterized in that: The conveying auxiliary pipeline is also provided with a pressure sensor. One side of the conveying auxiliary pipeline is extended to form a flushing pipeline, and a manual gate valve is provided on the flushing pipeline.

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