Full-dry fermentation process horizontal biogas device

Abstract

The utility model relates to the technical field of renewable energy sources, and particularly discloses a full-dry fermentation process horizontal biogas device which comprises a fermentation tank body, the fermentation tank body is symmetrically communicated and fixedly connected with a slag discharge pipe and a second return pipe; raw materials and biogas slurry are put into a feeding stirring pool, then a stirring motor drives a stirring auger to rotate to stir the raw materials and the biogas slurry, then a second suction pump is powered on to work to suck the raw materials and the biogas slurry into a fermentation tank body under negative pressure for fermentation to generate biogas, a second valve is opened to discharge certain biogas slurry and biogas residues, and then the second valve is closed. Opening a second suction pump to suck the raw material and the biogas slurry again, and opening a third valve to discharge a certain amount of biogas slurry into the feeding stirring tank at the same time, so that the solid content of the biogas raw material reaches the level of dry fermentation; the greenhouse is matched with the ground to form a relatively sealed and insulated space, so that the fermentation tank body is always at the temperature required by biogas fermentation, and the problem that an existing biogas generator is directly exposed in the atmospheric environment and is easily influenced by the temperature is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of renewable energy, in particular to a horizontal biogas device with a full dry fermentation process. Background Art

[0002] Biogas is a combustible gas that is naturally produced through the decomposition or fermentation process of anaerobic microorganisms (such as bacteria) under the conditions of lack of oxygen (isolated from air), suitable temperature, and pH value from organic substances; this phenomenon not only occurs in natural environments such as swamps, wetlands, sewage ponds, or manure pits, but can also be produced controllably through artificially designed biogas digesters or bioreactors.

[0003] The Chinese utility model patent with the publication number CN205590679U disclosed a biogas fermentation tank on September 21, 2016, which includes a fermentation tank shell. The fermentation tank shell is provided with a cone, and a spiral heating coil is arranged spirally outside the fermentation tank shell. The feed main pipe is communicated with the material inlet, and a feed screw pump is arranged at the material inlet. A plurality of feed branch pipes are arranged at the top of the fermentation tank shell, and all the feed branch pipes are respectively communicated with the feed main pipe; a discharge pipe and a sewage discharge pipe are opened at the bottom of the cone. The discharge pipe is communicated with a circulation pipe, the circulation pipe is communicated with the feed main pipe, and the bottom of the cone is communicated with an adjustment tank through the sewage discharge pipe. A sludge discharge screw pump is installed in matching with the sewage discharge pipe; an air outlet pipe is arranged at the top of the fermentation tank shell. The utility model has a spiral heating coil for heating and insulating the inner cavity of the fermentation tank shell, providing a good fermentation temperature environment for the material fermentation; the bottom of the fermentation tank shell is a cone structure, and the sludge is discharged into the adjustment tank through the sewage discharge pipe, and the incompletely fermented material is recycled through the circulation pipe again.

[0004] However, the above-mentioned disclosed solution has the following deficiencies: The existing biogas fermentation device is large in volume, high in height, and large in surface area, so it is easily affected by the air environment. In rainy and snowy weather, the temperature of the fermentation device is affected, and the temperature drop will affect the internal biogas fermentation speed. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the technical problem that the existing biogas fermentation device is large in volume, high in height, and large in surface area, so it is easily affected by the air environment. In rainy and snowy weather, the temperature of the fermentation device is affected, and the temperature drop will affect the internal biogas fermentation speed, and to provide a horizontal biogas device with a full dry fermentation process.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions to be realized;

[0007] The horizontal biogas device with a full dry fermentation process described in the present utility model includes a fermentation tank body; a slag discharge pipe and a second reflux pipe are symmetrically and communicatively fixedly connected to the fermentation tank body; a second valve and a third valve are respectively arranged on the slag discharge pipe and the second reflux pipe; a filter cover is fixedly connected inside the fermentation tank body corresponding to the second reflux pipe; a feed pipe is communicatively fixedly connected to the fermentation tank body; a fourth valve and a second suction pump are arranged on the feed pipe; a fixing frame is fixedly connected to the fermentation tank body; a stirring motor is fixedly connected to the fixing frame; a stirring auger is fixedly connected to the rotating shaft of the stirring motor; a feed stirring tank is arranged at the lower end outlet of the stirring auger and the feed pipe; a greenhouse is sleeved on the fermentation tank body.

[0008] Furthermore, an overflow pipe and a first reflux pipe are communicatively fixedly connected to the fermentation tank body; an overflow branch pipe is communicatively fixedly connected to the side of the overflow pipe; a first valve and a first suction pump are arranged at the lower end of the first reflux pipe.

[0009] Furthermore, a biogas residue and biogas slurry tank is sleeved on the lower end outlets of the first suction pump, the overflow branch pipe and the slag discharge pipe.

[0010] Furthermore, a gas storage chamber is communicatively fixedly connected to the fermentation tank body; a filter cage is fixedly connected to the lower end of the gas storage chamber; a sealing cover plate is detachably and hermetically fixedly connected to the upper end of the gas storage chamber; a gas guide pipe is communicatively fixedly connected to the side of the gas storage chamber; the biogas generated in the fermentation tank body is stored through the gas storage chamber and then enters an external gas storage cabinet through the gas guide pipe for storage.

[0011] The horizontal biogas device with a full dry fermentation process provided by the present utility model has the following beneficial effects:

[0012] 1. In the present utility model, raw materials and biogas slurry are placed in the feed stirring tank, and then the stirring auger is driven to rotate by the stirring motor to stir the raw materials and biogas slurry. Then, the second suction pump is powered on to suck the raw materials and biogas slurry into the fermentation tank body under negative pressure for fermentation to generate biogas. After fermentation for a period of time, the second valve is opened to discharge a certain amount of biogas slurry and biogas residue and then closed. The second suction pump is opened again to suck the raw materials and biogas slurry, and at the same time, the third valve is opened to discharge a certain amount of biogas slurry into the feed stirring tank to make the solid content rate of the biogas raw materials reach the level of dry fermentation. After the feeding is completed, the first suction pump is opened to absorb the excess biogas slurry into the fermentation tank body to make the biogas slurry reach the highest overflow position, so that all the biogas raw materials are in contact with microorganisms in the biogas slurry for complete fermentation. After generating biogas, the biogas enters the gas storage chamber through the filter cage and is collected through the gas guide pipe into the gas storage cylinder. In this way, feeding is repeated to generate biogas. The greenhouse and the ground form a relatively sealed and heat-insulating space, so that the fermentation tank body is always at the temperature required for biogas fermentation, thus resisting low-temperature weather and rain and snow weather, and solving the problem that the existing biogas generator is directly exposed to the atmospheric environment and is easily affected by temperature.

[0013] 2. The utility model can suck the external mixture into the first return pipe and then into the fermentation tank body through the first suction pump, so as to conveniently adjust the mixture ratio and liquid level height in the fermentation tank body in time; the biogas residue and biogas slurry pond is used for temporary collection, so that when it is necessary to adjust the biogas residue and biogas slurry ratio and height in the fermentation tank body, it can be conveniently adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following further describes the specific implementation manners of the utility model in detail with reference to the accompanying drawings;

[0015] Figure 1 is the first axonometric structure schematic diagram of the utility model;

[0016] Figure 2 is the second axonometric structure schematic diagram of the utility model;

[0017] Figure 3 is the third axonometric structure schematic diagram of the utility model;

[0018] Figure 4 is the fourth axonometric structure schematic diagram of the utility model.

[0019] Explanation of the reference numerals in the drawings: 1, fermentation tank body; 2, gas storage chamber; 3, sealing cover plate; 4, gas guide pipe; 5, filter cage; 6, first return pipe; 7, overflow pipe; 8, overflow branch pipe; 9, first valve; 10, first suction pump; 11, slag discharge pipe; 12, second valve; 13, second return pipe; 14, third valve; 15, feed pipe; 16, fourth valve; 17, second suction pump; 18, fixing frame; 19, stirring motor; 20, stirring auger; 21, feed stirring tank; 22, biogas residue and biogas slurry pond; 23, greenhouse; 24, filter cover. SPECIFIC IMPLEMENTATION MANNERS

[0020] It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the utility model with reference to the accompanying drawings in the embodiments of the utility model. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the utility model.

[0022] It should be noted that all directional indications (such as up-down-left-right-front-back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a certain specific posture (as shown in the attached drawings). If this specific posture changes, the directional indications will also change accordingly. The connections described can be direct connections or indirect connections.

[0023] Please refer to Figures 1-4 As shown, a horizontal biogas device with a full dry fermentation process includes a fermentation tank body 1; a slag discharge pipe 11 and a second reflux pipe 13 are symmetrically connected and fixed to the fermentation tank body 1; a second valve 12 and a third valve 14 are respectively provided on the slag discharge pipe 11 and the second reflux pipe 13; a filter cover 24 is fixedly connected inside the fermentation tank body 1 corresponding to the second reflux pipe 13; a feed pipe 15 is connected and fixed to the fermentation tank body 1; a fourth valve 16 and a second suction pump 17 are provided on the feed pipe 15; a fixing frame 18 is fixedly connected to the fermentation tank body 1; a stirring motor 19 is fixedly connected to the fixing frame 18; a stirring auger 20 is fixedly connected to the rotating shaft of the stirring motor 19; a feed stirring tank 21 is provided at the lower end outlet of the stirring auger 20 and the feed pipe 15; a greenhouse 23 is sleeved on the fermentation tank body 1; during operation, raw materials and biogas slurry are placed in the feed stirring tank 21, and then the stirring motor 19 drives the stirring auger 20 to rotate to stir the raw materials and biogas slurry. Then, the second suction pump 17 is powered on to suck the raw materials and biogas slurry into the fermentation tank body 1 under negative pressure for fermentation to produce biogas. After fermentation for a period of time, the second valve 12 is opened to discharge a certain amount of biogas slurry and biogas residue and then closed. The second suction pump 17 is opened again to suck the raw materials and biogas slurry, and at the same time, the third valve 14 is opened to discharge a certain amount of biogas slurry into the feed stirring tank 21 to make the solid content rate of the biogas raw materials reach the level of dry fermentation. After the feeding is completed, the first suction pump 10 is opened to absorb the excess biogas slurry into the fermentation tank body 1 to make the biogas slurry reach the highest overflow position, so that all the biogas raw materials are in contact with microorganisms in the biogas slurry for complete fermentation. After biogas is produced, the biogas enters the gas storage chamber 2 through the filter cage 5 and is collected through the gas guide pipe 4 into the gas storage cylinder. In this way, feeding is repeated to produce biogas. The greenhouse 23 cooperates with the ground to form a relatively sealed and heat-insulating space, so that the fermentation tank body 1 is always at the temperature required for biogas fermentation, thereby resisting low-temperature weather and rain and snow weather, and solving the problem that the existing biogas generator is directly exposed to the atmospheric environment and is easily affected by temperature.

[0024] An overflow pipe 7 and a first reflux pipe 6 are connected and fixed to the fermentation tank body 1; an overflow branch pipe 8 is connected and fixed to the side of the overflow pipe 7; a first valve 9 and a first suction pump 10 are provided at the lower end of the first reflux pipe 6; during operation, the first suction pump 10 can suck the external mixture into the first reflux pipe 6 and then into the fermentation tank body 1, so as to conveniently adjust the mixture ratio and liquid level height in the fermentation tank body 1 in a timely manner.

[0025] A biogas residue and biogas slurry pond 22 is sleeved on the lower end outlets of the first suction pump 10, the overflow branch pipe 8 and the slag discharge pipe 11. During operation, it is temporarily collected through the biogas residue and biogas slurry pond 22, so that when it is necessary to adjust the ratio and height of the biogas residue and biogas slurry in the fermentation tank body 1, it can be adjusted conveniently.

[0026] A gas storage chamber 2 is connected and fixedly installed on the fermentation tank body 1. A filter cage 5 is fixedly installed at the lower end of the gas storage chamber 2. A sealing cover plate 3 is detachably and hermetically fixedly installed at the upper end of the gas storage chamber 2. An air guide pipe 4 is connected and fixedly installed on the side surface of the gas storage chamber 2. The biogas generated in the fermentation tank body 1 is stored through the gas storage chamber 2 and then enters an external gas storage cabinet through the air guide pipe 4 for storage. During operation, the biogas residue cannot pass through through the filter cage 5 while the biogas passes through and reaches the gas storage chamber 2 for temporary storage, and then is discharged through the air guide pipe 4 for collection and use.

[0027] Adopting the above scheme, when the utility model is in use, raw materials and biogas slurry are placed in the feeding and stirring pool 21, and then the stirring auger 20 is driven to rotate by the stirring motor 19 to stir the raw materials and biogas slurry. Then, the second suction pump 17 is powered on to work, and the raw materials and biogas slurry are sucked into the fermentation tank body 1 under negative pressure for fermentation to generate biogas. After fermenting for a period of time, the second valve 12 is opened to discharge a certain amount of biogas slurry and biogas residue and then closed. The second suction pump 17 is opened again to suck the raw materials and biogas slurry, and at the same time, the third valve 14 is opened to discharge a certain amount of biogas slurry into the feeding and stirring pool 21, so that the solid content rate of the biogas raw materials reaches the level of dry fermentation. After the feeding is completed, the first suction pump 10 is opened to absorb the excess biogas slurry into the fermentation tank body 1, so that the biogas slurry reaches the highest overflow position, so that all the biogas raw materials are in contact with the microorganisms in the biogas slurry for complete fermentation. After generating biogas, the biogas enters the gas storage chamber 2 through the filter cage 5 and is collected through the air guide pipe 4 into the gas storage cylinder. Feed repeatedly in this way to generate biogas. The greenhouse 23 cooperates with the ground to form a relatively sealed and heat-preserving space, so that the fermentation tank body 1 is always at the temperature required for biogas fermentation, so as to resist low-temperature weather and rain and snow weather, and solve the problem that the existing biogas generator is directly exposed to the atmospheric environment and is easily affected by temperature. The external mixture can be sucked into the first return pipe 6 and then into the fermentation tank body 1 through the first suction pump 10, so as to conveniently and timely adjust the mixture ratio and liquid level height in the fermentation tank body 1. It is temporarily collected through the biogas residue and biogas slurry pond 22, so that when it is necessary to adjust the ratio and height of the biogas residue and biogas slurry in the fermentation tank body 1, it can be adjusted conveniently. The biogas residue cannot pass through through the filter cage 5 while the biogas passes through and reaches the gas storage chamber 2 for temporary storage, and then is discharged through the air guide pipe 4 for collection and use.

[0028] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0029] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed.

Claims

1. A horizontal biogas plant with full dry fermentation technology, characterized in that; The invention comprises a fermentation tank body (1); a slag discharge pipe (11) and a second return pipe (13) are symmetrically connected and fixedly connected to the fermentation tank body (1); a second valve (12) and a third valve (14) are respectively provided on the slag discharge pipe (11) and the second return pipe (13); a filter cover (24) is fixedly connected to the fermentation tank body (1) corresponding to the second return pipe (13); a feed pipe (15) is connected and fixedly connected to the fermentation tank body (1); a fourth valve (16) and a second suction pump (17) are provided on the feed pipe (15); a fixing frame (18) is fixedly connected to the fermentation tank body (1); a stirring motor (19) is fixedly connected to the fixing frame (18); a stirring auger (20) is fixedly connected to the rotating shaft of the stirring motor (19); a feeding stirring pool (21) is provided at the lower end outlets of the stirring auger (20) and the feed pipe (15); and a greenhouse (23) is sleeved on the fermentation tank body (1).

2. The horizontal biogas device of full dry fermentation process according to claim 1, characterized in that: The fermentation tank body (1) is connected and fixedly connected with an overflow pipe (7) and a first return pipe (6); the side of the overflow pipe (7) is connected and fixedly connected with an overflow branch pipe (8); and the lower end of the first return pipe (6) is provided with a first valve (9) and a first suction pump (10).

3. The horizontal biogas device of full dry fermentation process according to claim 2 is characterized in that: The lower outlets of the first suction pump (10), the overflow branch pipe (8) and the slag discharge pipe (11) are sleeved with a biogas slag and liquid pool (22).

4. The horizontal biogas device of full dry fermentation process according to claim 3 is characterized in that: The fermentation tank body (1) is connected and fixedly connected with a gas storage chamber (2); the lower end of the gas storage chamber (2) is fixedly connected with a filter cage (5); the upper end of the gas storage chamber (2) is detachably and sealably fixedly connected with a sealing cover plate (3); the side of the gas storage chamber (2) is connected and fixedly connected with an air guide pipe (4); the biogas generated in the fermentation tank body (1) is stored in the gas storage chamber (2) and then enters an external gas storage cabinet through the air guide pipe (4) for storage.

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