CN216303829U

CN216303829U - Energy-saving full-automatic multifunctional environment-friendly methane tank

Info

Publication number: CN216303829U
Application number: CN202121350091.3U
Authority: CN
Inventors: 陈开银
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-06-08
Filing date: 2021-06-17
Publication date: 2022-04-15
Anticipated expiration: 2031-06-17

Abstract

The utility model relates to an energy-saving full-automatic multifunctional environment-friendly methane tank which comprises a tank body horizontally lying underground, wherein the tank body is divided into a plurality of fermentation rooms by partition boards, a central rotating shaft penetrating through each partition board is arranged in the tank body along the axis direction of the tank body, a stirring impeller for stirring, propelling and pressing biogas slurry and slag is arranged on each fermentation room on the central rotating shaft, the left end of the tank body is connected with a tank body with a water pressure room and a feed port, an automatic feeding driving mechanism is arranged on the tank body, an automatic slag discharging mechanism is arranged at the right end of the tank body, and a methane storage and output mechanism is arranged at the upper part of the tank body; the central rotary shaft, the driving mechanism and the automatic slag discharging mechanism are operated by an automatic cycle time relay to control the motor to operate for a plurality of times every day to complete the whole implementation process. The biogas digester can fully utilize nutrients in biogas slurry, convert the nutrients into biogas, improve the gas production by about 50 percent, and meet the emission environmental protection requirement of biogas fertilizer.

Description

Energy-saving full-automatic multifunctional environment-friendly methane tank

Technical Field

The utility model relates to an energy-saving full-automatic multifunctional environment-friendly methane tank.

Background

In order to realize the goal of promising the world climate peak in China to reduce emission, biogas is popularized and used in many areas as a fuel source for daily life of residents and to solve the problem of water source and environment pollution caused by excrement, but because livestock is lack of excrement and less biogas material, if workers with high labor and cost get other biogas materials for supplement, the biogas is not more cost-effective and convenient than electricity or liquefied gas, the utilization rate of the existing biogas pool is not high due to low gas production and other reasons, for example, 6 pigs are raised and excrement and biogas can be normally used by 5 families, and whether 3 biogas pools with the gas production increased by 50% can be designed for solving the problem or not is raised, which is the primary purpose of the application, so that an environment-friendly biogas pool with high efficiency and full automation and convenient use is needed.

Disclosure of Invention

The utility model aims to provide an energy-saving full-automatic multifunctional environment-friendly methane tank, which can fully utilize nutrients in methane liquid to convert the nutrients into methane, and improve the gas production by about 50 percent.

The technical scheme of the utility model is as follows: an energy-saving full-automatic multifunctional environment-friendly methane tank comprises a tank body horizontally lying underground, the tank body is divided into a plurality of fermentation rooms by partition boards, a central rotating shaft penetrating through each partition board is arranged in the tank body along the axial direction of the tank body, a stirring impeller for stirring, propelling and pressurizing biogas slurry and slag is arranged on each fermentation room on the central rotary shaft, the left end of the tank body is connected with a tank body which is a water pressure chamber and a feed hopper, the right side of the tank body is provided with a driving mechanism with a central rotating shaft connected with automatic feeding in parallel, the right end of the tank body is provided with an output deslagging chamber, an automatic slag discharging mechanism is arranged in the output slag discharging room, a methane storage and output mechanism is arranged at the upper part of the tank body, the central rotary shaft, the driving mechanism and the automatic slag discharging mechanism are operated by an automatic cycle time relay to control the motor to operate for a plurality of times every day to complete the whole implementation process.

Furthermore, the tank body is made of glass fiber reinforced plastic or plastic, the tank body comprises two opposite tank bodies which are in a conical column shape, the opening ends of the tank bodies are respectively provided with an annular flange which protrudes outwards, the matching surfaces of the two annular flanges are provided with mutually meshed anti-seepage rings and coated with epoxy resin, and the two annular flanges are fixedly connected through bolts which are arranged at intervals.

Furthermore, biogas material through holes are formed in the middle and lower portions of the partition boards, a through hole used for penetrating through the central rotating shaft is formed in the center of each partition board, the upper portion of one partition board located on the rightmost side is sealed, and biogas vent holes are formed in the upper portions of the rest partition boards.

Furthermore, the partition plate comprises a partition plate body, a peripheral flange which forms a T shape with the partition plate body is arranged on the periphery of the partition plate body, a circle of convex ring for containing epoxy resin is arranged at the contact position of the peripheral flange and the small end of the inner wall of the tank body, and the peripheral flange is fixedly connected with the tank body through a bolt; the side wall of the through hole is provided with an inner peripheral flange, the partition plate body is evenly provided with a plurality of plate ribs along the circumferential direction, and the plate ribs and the inner peripheral flange are arranged on the right side face of the partition plate body.

Further, the biogas storage and output mechanism comprises a gas storage chamber formed in the tank body and located on the upper side of the liquid storage line, a three-way biogas pipe is arranged on the upper side of the tank body, a first branch pipe of the biogas pipe is communicated with the gas storage chamber, a second branch pipe of the biogas pipe is communicated with the top of the rightmost fermentation room, pressure gauges are arranged on the first branch pipe and the second branch pipe of the biogas pipe, and a valve located between the two pressure gauges is arranged on the second branch pipe of the biogas pipe.

Further, the stirring impeller comprises a connecting section impeller fixedly connected with the central rotating shaft in a joggle mode, an even number of blades are arranged on the connecting section impeller at equal intervals in the circumferential direction, the blades are fixedly connected with the connecting section impeller, the included angle between the blades and a right side partition plate in contact is 45 degrees, reinforcing ribs are arranged on the edges of the blades, and rib hooks perpendicular to the blades are arranged at the end portions of the outer sides of the blades.

Further, actuating mechanism is including setting up the driving motor on the cell body right side, be connected with the reduction gear on driving motor's the output shaft, be provided with driving pulley on the output shaft of reduction gear, the left end of center spiral shaft is provided with the driven pulleys who corresponds with driving pulley, is connected with the V belt between driving pulley and the driven pulleys, the V belt is provided with sealed safety cover outward, the bottom of sealed safety cover is equipped with the deslagging hole, driven pulleys, V belt are located the cell body.

Furthermore, the tail end of an output shaft of the speed reducer is driven by a gear pair to vertically penetrate a rotating shaft in the tank body from the top of the tank body, an inclined blade is installed at the bottom end of the rotating shaft, a filter screen is arranged between the inclined blade and a sealing protection cover, a feed inlet is arranged between the water pressure chamber and feed hopper and the tank body, and the distance between the upper part of the feed inlet and a liquid storage line in the tank body is not less than 500 mm; and sand washing holes are formed in the bottom of the tank body and on the lower side of the filter screen and the water pressure chamber.

Further, the automatic slag discharging mechanism comprises a slag discharging bin arranged at the lower part of an inner cavity of the output slag discharging room, the output slag discharging room is connected with the tank body through a slag discharging hole, and the distance between the upper part of the slag discharging hole and a liquid storage line in the tank body is not less than 500 mm; the improved excrement discharging device is characterized in that an excrement pump is arranged in the excrement discharging bin, an outlet above the excrement discharging room is connected with a sedimentation tank, an upper outlet end of the excrement pump penetrates into the sedimentation tank, an outlet above the excrement discharging room and an outlet above the excrement discharging room are positioned at two thirds of the height of the bottom of the sedimentation tank, an outlet above the excrement discharging room is also used as a backflow port, the sedimentation tank is in a trapezoidal shape when being overlooked, a long edge is an overflow side, and the top of the overflow side is lower than the top surface of the feed liquid in the sedimentation tank.

Compared with the prior art, the utility model has the following advantages:

1. the methane tank can be arranged underground without occupying space and without arranging a protective facility for resisting external pressure at the periphery.

2. The biogas digester forms a multi-section bearing inner supporting structure in the tank body by using the partition plates which are arranged in the horizontal tank body at intervals of about 500mm, can directly backfill to reduce the cost of external protective facilities, and forms a fermentation room for multi-stage nutrient digestion, so that biogas slurry is fully fermented.

3. The biogas digester transversely penetrates through each fermentation room by a shaft, and the rotation point is arranged in biogas slurry, so that the biogas digester is reliably sealed and never has air leakage; the feeding hopper is provided with inclined blades rotating at a high speed to crush lump materials, simultaneously mix scum with biogas slurry and press the mixture through the feeding inlet, and the scum is pushed step by the volume boosting blades generating vortices at a high speed; stirring impellers are arranged between each stage of fermentation, layering does not exist, dead corners do not exist, the limited volume of the tank body is fully utilized, and scum, sediment and clear liquid are stirred and fully mixed, so that anaerobic bacteria obtain sufficient nutrients and generate gas vigorously. Meanwhile, the nutrients are reduced by step-by-step flow and step-by-step digestion promotion until the energy-saving effect of zero or nearly zero release of the nutrients is achieved. The nutrient is the nutrient after the fermentation of the organic matter, the zero discharge or the near zero discharge of the nutrient is realized, namely the nutrient is discharged after being completely digested and decomposed or nearly completely digested and decomposed by anaerobic bacteria, the organic matter which is completely fermented in terms of environmental protection is sufficiently digested and decomposed by the anaerobic bacteria to be harmless organic carbon water fertilizer, parasitic ova, bacteria and viruses are killed through sufficient anaerobic reaction, antibiotics are reduced, and the natural environment-friendly and harmless biogas fertilizer is achieved.

4. The tail-end blade at the right end presses stubborn scum through a scum discharging hole, the scum smoothly enters the upper surface of a sedimentation tank through the top end of a scum discharging room by utilizing the floating characteristic of the scum, the scum slides through the overflow side of a long edge under the condition of no resistance of a trapezoidal edge to a biogas manure tank under the pushing of the vortex volume of a feeding hopper, the extremely strong digestion function of the scum discharging and passing smoothly is timely solved, the automatic circulating time relay is manually adjusted to control a motor to carry out feeding, in-tank stirring and scum step-by-step propelling, and the scum discharging and the scum achieve the full-automatic function effect in the whole process. In addition, the stopping of the moving blade also brings about the fermentation and hydrolysis of the scum in the liquid, and the best method for solving the scum is achieved, and the relation between the gas generation situation is detected, so that the gas inlet and the gas discharge are correctly adjusted to solve the gas generation quantity and save energy.

5. The design of the partition ribs not only improves the stability under pressure, but also establishes the partition rib distance with the methane material through holes and is used for the pressed playing in the middle and lower parts, and the faraway also provides a carrier for the smooth and leakless multifunctional characteristic of the methane tank and the attachment, growth and propagation of anaerobic bacteria.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of area A of FIG. 1 in accordance with the present invention;

FIG. 3 is a schematic view of the construction of the spacer of the present invention;

fig. 4 is a schematic structural view of a stirring impeller of the present invention;

FIG. 5 is a schematic view of the output slagging chamber of the present invention;

in the figure: 10-tank body 11-fermentation room 12-tank body 13-annular flange 14-anti-seepage ring 15-bolt 16-biogas pipe 17-pressure gauge 18-valve 19-feed inlet 20-partition plate 21-biogas material through hole 22-through hole 23-biogas vent hole 24-partition plate body 25-outer peripheral flange 26-convex ring 27-bolt 28-inner peripheral flange 29-plate rib 30-central rotating shaft 40-stirring impeller 41-connecting section impeller 42-blade 43-reinforcing rib 44-rib hook 45-tenon bolt 46-included angle 50-tank body 51-hydraulic room and feed hopper 52-driving motor 53-three-stage speed reducer 54-driving pulley 55-driven pulley 56-V belt 57-triangular belt 57 Protective cover 58, rotating shaft 59, inclined blade 60, filter screen 61, sand washing hole 62, output slag discharging room 63, slag discharging hole 64, manure pump 65, sedimentation tank 66, overflow side 67, slag discharging bin 68, liquid storage line 69, gear pair 70, and upper outlet end of the manure pump and output slag discharging room.

Detailed Description

In order to make the aforementioned features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below, but the present invention is not limited thereto.

Refer to fig. 1 to 5

An energy-saving full-automatic multifunctional environment-friendly biogas digester comprises a tank body 10 lying underground, and the tank body is divided into a plurality of fermentation rooms 11 through partition plates 20 so as to ferment biogas slurry step by step. The utility model discloses a sediment backflow device, including jar body, the jar is internal to be provided with a central staff 30 that runs through each space bar along its axis direction, lie in on the central staff and all be provided with the stirring impeller 40 that is used for stirring, impels, seizes pressure natural pond liquid and sediment between every fermentation, the left end of the jar body is connected with the cell body 50 of water pressure room and feeder hopper 51, be provided with the central staff on the cell body and arrange the actuating mechanism that connects in parallel with automatic feed, the right-hand member of the jar body is provided with output and arranges sediment room 62, be provided with automatic slag removal mechanism in the output arranges the sediment room to accomplish sediment backward flow when realizing arranging the sediment. The upper part of the tank body is provided with a methane storage and output mechanism. The central rotary shaft, the driving mechanism and the automatic slag discharging parallel mechanism are controlled by an automatic cycle time relay to drive (including a dung pump) the whole process of starting, rotating time, stopping movement and restarting, the rotating speed of the stirring impeller is generally about 5 circles per minute at a slow speed, and the rotating speed, the time of each stirring and stopping interval are summarized by practical experience.

In this embodiment, the tank body is made of glass fiber reinforced plastic or plastic, the tank body comprises two conical-column-shaped tank bodies 12 which are oppositely arranged, the two tank bodies can be stacked for transportation, and stirring impellers and partition plates are sequentially placed in the tank bodies for multi-stage progressive installation. The opening end of the barrel body is provided with annular flanges 13 protruding outwards, matching surfaces of the two annular flanges are provided with anti-seepage rings 14 meshed with each other and coated with epoxy resin, and the two annular flanges are fixedly connected through bolts 15 arranged at intervals. Thereby realizing the mutual connection of the two barrel bodies and ensuring the strength and the rigidity of the tank body; meanwhile, the biogas slurry leakage at the joint of the two can be avoided; then, the central rotary shaft is pressed into the stirring impeller from one end of the tank step by step, and then the blade tenon bolt is punched into the reserved hole of the tank body and the tenon bolt hole is filled. The connection form of the tank body and the output slag discharge room is the same as that of the two tank bodies.

In this embodiment, the space bar includes the space bar plate body 24, the periphery of space bar plate body is provided with the periphery flange 25 that forms the T shape with the space bar plate body, periphery flange and jar internal wall small-end contact department are provided with the protruding circle 26 that the round is used for holding epoxy, links firmly through bolt 27 between periphery flange and the jar body. Because two staving are the toper, and only have the little clearance of angle between the peripheral flange, so be provided with the protruding circle that the round is used for holding epoxy on the marginal angle of peripheral flange contact jar body tip, just can thoroughly block up the gap between space bar and the jar body to it has epoxy to annotate, in order to guarantee the wholeness that the jar body bore external pressure.

In this embodiment, the center of space bar is provided with through-hole 22 that is used for wearing the central pivot, and the through-hole size needs to be greater than central pivot diameter 80mm for use and blade installation, be provided with interior circumference flange 28 on the lateral wall of through-hole, evenly be provided with a plurality of board ribs 29 along the circumferencial direction on the space bar plate body, board rib, interior circumference flange are provided with on the right flank of space bar plate body, are close to on the side of automatic slag removal mechanism one side promptly.

In the embodiment, the plate ribs are 30mm away from the stirring impeller, so that carriers are provided for attachment, growth and propagation of anaerobic bacteria, and a convex ring can be added in the middle of the ribs between the outer peripheral flange and the inner peripheral flange to increase the carriers and enhance the rigidity; the left side surface of the partition plate body is a smooth plate surface, the stirring impeller can rotate along the partition plate body, and biogas material through holes 21 are formed in the middle and lower parts of the partition plate body so as to press biogas materials to a next stage fermentation room.

In this embodiment, the plate ribs are respectively connected with the outer circumferential flange, the inner circumferential flange and the plate body and made of glass fiber reinforced plastic or plastic, and are integrally formed into the partition plate through one-time casting.

In this embodiment, the upper part of one partition plate located at the rightmost side is closed, and the upper parts of the other partition plates are provided with biogas vent holes 23. The biogas storage and output mechanism comprises a gas storage chamber formed in the tank body and positioned above the liquid storage line 68, a three-way biogas pipe 16 is arranged on the upper side of the tank body, a first branch pipe of the biogas pipe is communicated with the gas storage chamber, a second branch pipe of the biogas pipe is communicated with the top of the rightmost fermentation room, pressure gauges 17 are arranged on the first branch pipe and the second branch pipe of the biogas pipe, and a valve 18 positioned between the two pressure gauges is arranged on the second branch pipe of the biogas pipe.

The biogas is collected through the biogas vent holes and then is output through the biogas pipe. When the valve is closed, the methane in the last stage fermentation room is separated from the methane pipe, the left side and the right side of the valve are provided with pressure gauges, and the methane yield in the last stage fermentation room can be observed by observing the reading of the pressure gauges on the right side. The reaction time in each stage of fermentation room is further controlled by controlling and adjusting the feeding amount and the feeding speed, so that the nutrients of the biogas slurry in the last stage of fermentation room are completely consumed, and the biogas is basically not generated any more.

In this embodiment, the rotating supports at the two ends of the central rotating shaft are provided with the non-embroidering shaft sleeves, the stirring impeller comprises a connecting section impeller 41 which is fixedly connected with the central rotating shaft in a joggle manner, and the connecting section impeller is provided with an even number of blades 42 at equal intervals along the circumferential direction. The joggle joint is fixedly connected with the gap between the two blades, a joggle bolt 45 fixed by the joggle joint radially penetrates through the central rotating shaft, two ends of the joggle bolt respectively extend out of the central rotating shaft by more than 80mm, the diameter of the joggle bolt is not less than 18mm, and a reinforcing structure connected with the two blades is arranged on the periphery of the joggle bolt with the outer diameter of the extending shaft by more than 80 mm. The connected and reinforced holes are wider than the tenon bolts by 10mm in diameter and are not less than 80mm and 10mm in depth than the outer diameter of the extended central rotating shaft. After the installation, the hole and the tenon bolt are filled with epoxy resin for sealing connection, so that the rotating force of the central shaft is transmitted to the blade through the tenon bolt.

In this embodiment, the angle 46 between the vane and the right spacer plate is 45 °, and when the vane rotates, scum is concentrated in a triangular area between the vane and the spacer plate at 45 ° to 90 °. When the central rotary shaft rotates, the biogas slurry, the sediments and the scum are pushed to enter the next stage of fermentation room through the partition plate under the action of the stirring impeller. The edge of each blade (the impeller and the blade are made of PVC plastic with good toughness) is provided with a reinforcing rib 43, and the end part of each blade is provided with a rib hook 44 which is perpendicular to the blade. When the blade is screwed to the biogas material through hole, the reinforcing rib contacting one side (right side) of the through hole is positioned on the back side of the through hole, and the reinforcing rib on the other side (left side) of the blade is positioned on the front side, so that the lateral hook rib hook scum is formed and passes through the left side flat surface. Under the combined action of the inclined plane principle and the rotation inertia, most of scum is close to the surface of the right partition plate, and the scum smoothly slides through the biogas material through holes by the stirring blades, so that the scum in the stage of fermentation room is prevented from deforming by the blades in the stirring process.

In this embodiment, actuating mechanism is including setting up the driving motor 52 on cell body upper end right side support, be connected with tertiary reduction gear 53 on driving motor's the output shaft, be provided with driving pulley 54 on the output shaft of reduction gear, the left end of center spiral shaft is provided with the driven pulleys 55 (by rust-resistant nylon manufacturing) that correspond with driving pulley, is connected with V-belt 56 between driving pulley and the driven pulleys, the V-belt is provided with safety cover 57 outward to prevent that the grit card is on V-belt and band pulley. The bottom of safety cover is equipped with the row's cinder hole, driven band pulley, V belt are located the cell body.

In this embodiment, the end of the output shaft of the speed reducer is driven by a gear pair 69 to vertically penetrate a rotating shaft 58 in the tank body from the top of the tank body, the bottom end of the rotating shaft is provided with an oblique blade 59, the agglomerated biogas is crushed by the oblique blade, scum floating in the liquid surface of the hydraulic pressure chamber is pressed into the liquid and mixed, and the liquid enters the tank body along the liquid feed inlet. Be provided with filter screen 60 between slant blade and the sealed safety cover, be equipped with feed inlet 19 between the water pressure room and the jar body, and feed inlet upper portion and jar internal liquid storage line distance are no less than 500 mm. The bottom of cell body just is located the downside between filter screen and water pressure and is provided with sand washing hole 61 to avoid impurity to get into in the jar influence normal operating and destroy the component.

In this embodiment, the gear pair includes a driving bevel gear connected to the end of the output shaft, and a driven bevel gear engaged with the driving bevel gear is provided at the upper end of the rotating shaft.

In the embodiment, the automatic slag discharging mechanism comprises a slag discharging bin 67 arranged at the lower part of an inner cavity of an output slag discharging room, the output slag discharging room is connected with the tank body through a slag discharging hole 63, and the distance between the upper part of the slag discharging hole and a liquid storage line in the tank body is not less than 500 mm; a dung pump 64 is arranged in the slag discharging bin, a sedimentation tank 65 is arranged above the output slag discharging room, the sedimentation tank is trapezoidal when viewed from top, an overflow side 66 (the long edge is an overflow side) slightly lower than the top surface of feed liquid in the tank body is arranged at the top of the sedimentation tank, the top of the overflow side is lower than the top surface of the slag liquid in the sedimentation tank, and slag discharging and liquid discharging amount is promoted by multiple feeding amounts, so that the biogas production amount is improved.

In this embodiment, the upper outlet end 70 of excrement pump penetrates the sedimentation tank and export the top export between arranging the sediment and be located sedimentation tank's bottom of the pool and play two thirds the department, the top export between arranging the sediment in the output also is as the backward flow mouth, has sediment liquid discharge and backward flow dual-purpose function to excrement pump stop time flowing back and retrieve and take out the balanced dual-purpose function of stock solution in the excessive clear liquid holding tank.

The working method of the methane tank comprises the following steps:

(1) completing the installation and debugging of all parts, wherein the specific installation can refer to the expression in the structure of the methane tank;

(2) starting a driving motor to rotate the central rotating shaft at a low speed so as to drive the stirring impeller to rotate;

(3) inputting mixed materials of acid liquor made by retting straws, excrement slurry, anaerobic bacteria strains and water in a proper proportion into the hydraulic pressure chamber, pressing floating slag into the feed liquid under the action of the inclined blades, and further conveying the floating slag into the tank body;

(4) after the biogas pool is filled with biogas slurry with a certain liquid storage height, a total output valve (not drawn) is closed, the biogas generation is preferably added with the feed liquid every day after use, anaerobic fermentation is carried out in the tank, and the motor and the dung pump enter a working state after the required motion process of the automatic cycle time relay is adjusted: the central rotary shaft rotates to drive the stirring blades to fully mix the sediment, the scum and the biogas slurry, and the scum is pushed into the next stage of fermentation room;

(5) observing the readings of the two pressure gauges, and opening the biogas pipe for daily use when the reading of the pressure gauge on the left side of the valve reaches a preset value;

(6) and detecting the nutrient condition of the last-stage biogas slurry on the right side, observing the reading of a pressure gauge on the right side of the valve after the valve is closed, and presuming the nutrient condition in the last stage according to the conditions of stopping, developing and developing speed of the observation reading, so that the feeding amount and speed are adjusted to achieve zero or near zero nutrient discharge.

The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.

Claims

1. An energy-saving full-automatic multifunctional environment-friendly methane tank comprises a tank body horizontally lying underground, and is characterized in that the tank body is divided into a plurality of fermentation rooms by partition boards, a central rotating shaft penetrating through each partition board is arranged in the tank body along the axis direction of the tank body, a stirring impeller for stirring, propelling and pressing methane liquid and slag is arranged on each fermentation room on the central rotating shaft, the left end of the tank body is connected with a tank body which is a water pressure room and a feed hopper, the right side of the tank body is provided with a driving mechanism with the central rotating shaft connected with automatic feeding in parallel, the right end of the tank body is provided with an output slag discharging room, an automatic slag discharging mechanism is arranged in the output slag discharging room, and the upper part of the tank body is provided with a methane storage and output mechanism; the central rotary shaft, the driving mechanism and the automatic slag discharging mechanism are operated by an automatic cycle time relay to control the motor to operate for a plurality of times every day to complete the whole implementation process.

2. The energy-saving full-automatic multifunctional environment-friendly methane tank as claimed in claim 1, wherein the tank body is made of glass fiber reinforced plastic or plastic, the tank body comprises two opposite and conical cylindrical tank bodies, the open ends of the tank bodies are provided with annular flanges protruding outwards, the matching surfaces of the two annular flanges are provided with mutually meshed anti-seepage rings and coated with epoxy resin, and the two annular flanges are fixedly connected through bolts arranged at intervals.

3. The energy-saving full-automatic multifunctional environment-friendly biogas digester as claimed in claim 1 or 2, wherein the middle and lower parts of the partition plate are provided with biogas material through holes, the center of the partition plate is provided with a through hole for penetrating the central rotary shaft, the upper part of the rightmost partition plate is closed, and the upper parts of the other partition plates are provided with biogas vent holes.

4. The energy-saving full-automatic multifunctional environment-friendly biogas digester as claimed in claim 3, wherein the partition plate comprises a partition plate body, a peripheral flange forming a T shape with the partition plate body is arranged on the periphery of the partition plate body, a circle of convex ring for containing epoxy resin is arranged at the contact position of the peripheral flange and the inner wall of the tank body, and the peripheral flange is fixedly connected with the tank body through bolts; the side wall of the through hole is provided with an inner peripheral flange, the partition plate body is evenly provided with a plurality of plate ribs along the circumferential direction, and the plate ribs and the inner peripheral flange are arranged on the right side face of the partition plate body.

5. The energy-saving full-automatic multifunctional environment-friendly methane tank as claimed in claim 3, wherein the methane storage and output mechanism comprises a gas storage chamber formed in the tank body and located above the liquid storage line, a three-way methane pipe is arranged above the tank body, a first branch pipe of the methane pipe is communicated with the gas storage chamber, a second branch pipe of the methane pipe is communicated with the top of the rightmost fermentation room, pressure gauges are arranged on the first branch pipe and the second branch pipe of the methane pipe, and a valve located between the two pressure gauges is arranged on the second branch pipe of the methane pipe.

6. The energy-saving full-automatic multifunctional environment-friendly methane tank as claimed in claim 1, wherein the stirring impeller comprises a connection section impeller joggled and fixedly connected with the central rotating shaft, an even number of blades are equidistantly arranged on the connection section impeller along the circumferential direction, the blades are fixedly connected with the connection section impeller and form an included angle of 45 degrees with a right side spacing plate which is contacted with the connection section impeller, reinforcing ribs are arranged on the edges of the blades, and rib hooks perpendicular to the blades are arranged at the outer side ends of the blades.

7. The methane tank of claim 1, 2, 4, 5, or 6, wherein the driving mechanism comprises a driving motor disposed on the right side of the tank body, an output shaft of the driving motor is connected to a speed reducer, an output shaft of the speed reducer is provided with a driving pulley, a driven pulley corresponding to the driving pulley is disposed at the left end of the central rotating shaft, a V-belt is connected between the driving pulley and the driven pulley, a sealing protective cover is disposed outside the V-belt, a slag discharge hole is disposed at the bottom of the sealing protective cover, and the driven pulley and the V-belt are disposed in the tank body.

8. The energy-saving full-automatic multifunctional environment-friendly methane tank as claimed in claim 7, wherein the end of the output shaft of the reducer is driven by a gear pair to vertically penetrate a rotating shaft in the tank body from the top of the tank body, the bottom end of the rotating shaft is provided with an inclined blade, a filter screen is arranged between the inclined blade and a sealing protection cover, a feed inlet is arranged between the hydraulic pressure chamber and feed hopper and the tank body, and the distance between the upper part of the feed inlet and a liquid storage line in the tank body is not less than 500 mm; and sand washing holes are formed in the bottom of the tank body and on the lower side of the filter screen and the water pressure chamber.

9. The energy-saving full-automatic multifunctional environment-friendly methane tank as claimed in claim 1, wherein the automatic slag discharging mechanism comprises a slag discharging bin arranged at the lower part of the inner cavity of the output slag discharging room, the output slag discharging room is connected with the tank body through a slag discharging hole, and the distance between the upper part of the slag discharging hole and the liquid storage line in the tank body is not less than 500 mm; the improved excrement discharging device is characterized in that an excrement pump is arranged in the excrement discharging bin, an outlet above the excrement discharging room is connected with a sedimentation tank, an upper outlet end of the excrement pump penetrates into the sedimentation tank, an outlet above the excrement discharging room and an outlet above the excrement discharging room are positioned at two thirds of the height of the bottom of the sedimentation tank, an outlet above the excrement discharging room is also used as a backflow port, the sedimentation tank is in a trapezoidal shape when being overlooked, a long edge is an overflow side, and the top of the overflow side is lower than the top surface of the feed liquid in the sedimentation tank.