CN214654861U - Biomass fermentation system for producing organic fertilizer and methane by using solar energy for heating - Google Patents

Abstract

A biomass fermentation system for producing organic fertilizer and methane by using solar energy to increase temperature belongs to the field of biomass fermentation, the biomass fermentation system comprises a travelling crane, a solar heat collecting plate, a fermentation tank and a discharging conveying belt which are arranged in an inclined way from top to bottom, wherein a plurality of anaerobic tanks, aerobic biomass fillers and a plurality of aeration discs are arranged in the fermentation tank from top to bottom, the bottom of the fermentation tank is provided with an inverted frustum discharge hopper, the bottom of the inverted frustum discharge hopper is provided with a discharger, the plurality of anaerobic tanks are connected with a methane conveying pipeline, and the plurality of aeration discs are communicated with an air supply pipeline. Can change waste into valuable.

Description

Biomass fermentation system for producing organic fertilizer and methane by using solar energy for heating

Technical Field

The utility model relates to a fermentation system, in particular to utilize solar energy to heat the living beings fermentation system who makes organic fertilizer and marsh gas belongs to living beings fermentation field.

Background

The crop straw is rich in nitrogen, phosphorus, potassium, calcium, magnesium, organic matters and the like, is a multipurpose renewable biological resource, and is a coarse feed. In autumn, along with the harvest of grain, can produce a large amount of straws, traditional mode of handling the straw is all to carry out the burning on the spot, along with social development, people's requirement to the environmental protection is higher and higher, and burning straw can pollute the atmosphere, and a large amount of straw ashes can get into human respiratory track, cause respiratory disease, though there is the method of making organic fertilizer with the straw at present, but, the organic fertilizer fertility on the market is relatively weak now, still need add certain chemical fertilizer when planting the crop and increase the fertility.

In addition, with the rapid development of the breeding industry, the material requirements of people are met, and meanwhile, corresponding environmental problems are brought. The original culture mode discharges the excrement directly without treatment, which aggravates water pollution and environmental pollution.

Contain a large amount of organic matters in the rubbish from cooking, the processing mode of the organic matter of rubbish from cooking is mainly landfill, compost and production fodder and incineration power generation etc. at present, simple refuse treatment can bring environmental pollution, utilize rubbish from cooking effectively, can increase the organic matter content in the fertilizer, rely on natural fermentation, can realize cyclic utilization, however, along with the increase of municipal refuse volume, the applicable landfill site that is close to the city is more and less, open up remote landfill site and improved the refuse discharge expense again greatly, high expense can't bear even so.

Biogas fuel, which can be used as a domestic energy source in rural areas, for example: cooking and boiling water in a methane stove; lighting the methane lamp; a methane pressure cooker; a methane water heater. If the biogas output is larger, the large pig farm or cattle farm can also be used as biogas power generation and boiler fuel. The marsh gas can also be used in agricultural production, such as greenhouse heat preservation, agricultural product baking, grain storage, fruit preservation and the like. It can also be used for generating electricity, as agricultural power, for generating electricity, burning boilers, processing food, heating or supplying to urban residents.

The organic fertilizer contains various organic acids, peptides and rich nutrient elements including nitrogen, phosphorus and potassium, and is an indispensable fertilizer in agricultural production. The organic fertilizer not only can provide comprehensive nutrition for crops, but also has long fertilizer efficiency, can increase and update soil organic matters, promote microbial propagation, improve the physicochemical property and the biological activity of soil, and is a main nutrient for green food production.

Although the crop straws, the human and animal excreta and the kitchen waste contain a large amount of organic matters, the organic matters also contain harmful strains which are directly used as fertilizers, so that the fertilizer efficiency is not high, and adverse factors such as plant diseases and insect pests and the like are brought to crops, melons, fruits, vegetables and the like, so that the harmful bacteria can be removed only through fermentation, beneficial bacteria are generated, and efficient organic fertilizers are formed, and meanwhile, the biogas generated by fermentation can solve the fuel problem of rural agriculture.

However, the biogas is generated by anaerobic fermentation, the organic fertilizer is generated by aerobic fermentation, how to organically combine the anaerobic fermentation and the aerobic fermentation, and organically combine the treatment of crop straws, human and animal excreta and kitchen waste with the biogas production under low energy consumption is a new subject in front of agricultural technicians.

Disclosure of Invention

To in the waste treatment such as crop straw, people and livestock excrement and urine, kitchen surplus, how can organically combine anaerobic fermentation and aerobic fermentation together, make the problem of marsh gas and organic fertilizer simultaneously under lower energy consumption, the utility model provides an utilize biomass fermentation system of solar energy heating manufacturing organic fertilizer and marsh gas, its purpose utilizes the heat that biomass aerobic fermentation produced and the heat of solar energy to guarantee the natural pond liquid high temperature fermentation of intussuseption of fermentation cylinder intussuseption to improve anaerobic fermentation's gas production rate, supply the required fuel energy of rural agriculture, meanwhile, through aerobic fermentation, also can produce required organic fertilizer and satisfy the required high-efficient fertilizer of agricultural production, this technique can keep ecological balance, can realize the environmental protection type manufacturing that satisfies the sustainable development of agricultural production again.

The utility model discloses a collective technical scheme is: the biomass fermentation system for producing organic fertilizer and methane by using solar energy for heating comprises an air supply pipeline, and comprises a travelling crane, a solar heat collecting plate, a fermentation tank and an unloading conveying belt which are arranged in an inclined manner from top to bottom, wherein a plurality of anaerobic tanks, aerobic biomass fillers and a plurality of aeration discs are arranged in the fermentation tank from top to bottom;

further, the fermentation tank is of a cubic structure, and the travelling crane is arranged on a support at the periphery of the fermentation tank;

furthermore, the solar heat collecting plates are obliquely arranged on one side facing the south in a matrix state, hinged shafts are arranged below the multiple rows of solar heat collecting plates, corresponding support columns are arranged on the north side, and heat absorbing coatings are coated on the solar heat collecting plates;

furthermore, the fermentation tank is positioned on the bottom support, a plurality of rectangular frames are arranged above a plurality of aeration discs in the fermentation tank, trapezoidal funnels are arranged below the rectangular frames respectively, spiral conveyors are arranged at outlets of the trapezoidal funnels respectively, vent holes are formed among the trapezoidal funnels, the spiral conveyors face the inner sides of discharge hoppers at the bottom of the fermentation tank, aerobic biomass fillers are arranged in the rectangular frames, and a plurality of anaerobic tanks are arranged above the rectangular frames in an array manner;

furthermore, the plurality of anaerobic tanks are arranged on the rectangular frame, black heat absorption coatings are coated on the peripheries of the plurality of anaerobic tanks, biogas slurry is filled in the plurality of anaerobic tanks, biogas conveying pipelines are respectively arranged on one sides of the plurality of anaerobic tanks, the plurality of biogas conveying pipelines are converged on a biogas collecting pipe, and quick connectors are arranged between the anaerobic tanks and the biogas conveying pipelines;

further, the discharger comprises a helical blade, the helical blade is arranged on a slewing bearing, at least one scraper is fixedly arranged on the slewing bearing, a cutting edge is parallel to the inner side of the inverted cone discharging hopper, and the distance between the cutting edge and the inner side of the inverted cone discharging hopper is less than 5 cm;

further, the air supply pipeline extends to the bottom of the aerobic fermentation tank, and a plurality of aeration discs are arranged on the air supply pipeline at the bottom of the aerobic fermentation tank;

further, the discharging conveyor belt is positioned right below the discharger, the discharging conveyor belt is synchronous with the screw conveyor and the discharger, the discharger comprises a slewing bearing, a main shaft is fixed on a rotating inner ring of the slewing bearing through a main shaft support frame, and spiral blades are fixed on the periphery of the main shaft;

further, a driving part of the spiral conveyor is arranged in the middle, a hollow gear is fixedly connected to a main shaft of the spiral conveyor, and a transmission motor drives the hollow gear to rotate through a transmission mechanism;

furthermore, the biogas collecting pipe is connected to a biogas storage tank through a water removal tower and a desulfurization tower.

The utility model discloses the positive effect who has is: the crane can be used for hoisting the aerobic biomass and the anaerobic tank and for rotating the solar heat collecting plate, and the aerobic biomass filler and the anaerobic tank can be hoisted well only by rotating the solar heat collecting plate to one side of the supporting column; the solar energy heat collecting plate and the anaerobic tank are coated with the heat absorbing layer on the surface, so that the absorption of solar energy radiation can be increased, the heat of sunlight can be transferred to the anaerobic tank or the aerobic biomass filler, and meanwhile, the heat generated by the fermentation of the aerobic biomass filler can be absorbed, the anaerobic fermentation is promoted, and more methane is generated; a plurality of vent holes are formed above a plurality of aeration discs in the fermentation tank, so that air can rise conveniently, the oxygen content is increased, and the fermentation speed is accelerated; the inverted cone discharging hopper and the trapezoidal funnel are arranged at the bottom of the fermentation tank, so that the fermented organic fertilizer can be discharged conveniently, particularly, the spiral feeder is arranged in the trapezoidal funnel, the discharger is arranged on the discharge opening, the discharging speed can be accelerated, particularly, the organic fertilizer can be prevented from being stuck in the inverted cone discharging hopper by driving the scraper through the rotary support, the discharging can be accelerated, and the organic fertilizer can be discharged on the conveying belt in sequence; the plurality of screw conveyors face the inverted cone discharging hopper, so that the organic fertilizer can be conveyed into the hollow inverted cone, and the discharging is facilitated; the driving part of the screw conveyor is arranged in the middle, the main shaft of the screw conveyor is fixedly connected with the hollow gear, the hollow gear can be driven by a transmission motor through a transmission mechanism, and meanwhile, the discharged material can be sent to the inverted cone discharging hopper through the hollow part of the gear; through filling natural pond liquid in the anaerobic jar, can be under the situation of externally heating, produce marsh gas, marsh gas supplies agricultural production and the use of agricultural production after desulfurization and dewatering, the utility model discloses, through the unified processing with straw, excrement and urine and kitchen garbage, the natural pond liquid high temperature fermentation of filling in the fermentation cylinder is guaranteed to the heat that utilizes living beings aerobic fermentation to produce and the heat of solar energy to improve anaerobic fermentation's gassing rate, supply the required fuel energy of rural agriculture, meanwhile, through aerobic fermentation, also can produce required organic fertilizer and satisfy the required high-efficient fertilizer of agricultural production, this technique both reducible pollution, protection all ring edge borders, can realize the environmental protection manufacturing that satisfies agricultural production's sustainable development again, can change waste into valuables, can keep ecological balance.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic longitudinal sectional view of a fermenter.

Fig. 3 is a schematic view of the structure of the hollow gear.

Figure 4 is a longitudinal section along the central axis of the discharger.

Fig. 5 is a schematic view of the bottom structure of the discharger.

Description of reference numerals: 11-bracket, 12-travelling crane, 13-guide rail, 14-fermentation tank, 14 a-anaerobic zone, 14 b-aerobic zone, 15-solar heat collecting plate, 16-discharging conveyor belt, 16 a-roller, 17-inverted cone discharging hopper, 18-discharger, 19-blower, 20-air supply pipeline, 21-biogas collecting pipe, 22-biogas storage tank, 23-desulfurizing tower, 24-water removing tower, 25-tank frame, 26-articulated shaft, 27-anaerobic tank, 28-rectangular frame, 29-trapezoidal funnel, 30-spiral feeder, 31-vent hole, 32-transmission box, 33-transmission motor, 34-aeration disc, 35-scraper, 36-aerobic biomass filler, 37-hollow gear, 14a, 38-radial ribs, 39-inclined cutters, 40-hollow parts, 41-slewing bearings, 41 a-rotating parts, 41 b-fixed parts, 42-main shaft support frames, 43-main shafts, 44-helical blades, 45-discharging motors, 46-driving part supports, 47-speed reducers, 48-driving gears, 49-supporting plates and 50-rotating inner rings.

Detailed Description

In order to make those skilled in the art understand and implement the present invention, the following detailed description will be further provided with reference to the accompanying drawings.

The utility model discloses a collective technical scheme is: a biomass fermentation system for producing organic fertilizer and methane by using solar energy for heating, wherein, figure 1 is the overall structure schematic diagram of the utility model, and figure 2 is the longitudinal section structure schematic diagram of a fermentation tank 14. Including supply air duct 20, biomass fermentation system top-down is including driving 12, the solar panel 15 of slope setting, fermentation cylinder 14, the conveyer belt 16 of unloading, wherein top-down is provided with a plurality of anaerobic jars 27 in the fermentation cylinder 14, aerobic biomass filler, a plurality of aeration dish 34, fermentation cylinder 14 upper portion is anaerobic zone 14a, anaerobic zone 14a below is aerobic zone 14b, aerobic zone 14b lower part is the portion of blowing, fermentation cylinder 14 bottom is back taper platform discharge hopper 17, back taper platform discharge hopper 17 bottom is provided with tripper 17, the portion of blowing is provided with a plurality of screw feeders 30 that lead to back taper platform discharge hopper 17 simultaneously, be connected with marsh gas pipeline on a plurality of anaerobic jars 27, a plurality of aeration dish 34 and supply air duct 20 intercommunication.

The fermentation tank 14 is of a cubic structure, the travelling crane 12 is arranged on the support 11 at the periphery of the fermentation tank 14, and the travelling crane 13 is a travelling crane guide rail.

The solar heat collecting plates 15 are obliquely arranged on one side facing south in a matrix state, hinged shafts 25 are arranged below the multiple rows of solar heat collecting plates 15, corresponding supporting columns 15a are arranged on the north side, and heat absorbing coatings are coated on the solar heat collecting plates 15;

the fermentation tank 14 is located on the bottom of the support 11, a plurality of rectangular frames 28 are arranged above a plurality of aeration discs 34 in the fermentation tank 14, trapezoidal funnels 29 are arranged below the rectangular frames 28 respectively, spiral conveyors are arranged at outlets of the trapezoidal funnels 29 respectively, air vents 31 are arranged among the trapezoidal funnels 29, the spiral conveyors face the inner sides of discharge hoppers at the bottom of the fermentation tank 14, aerobic biomass filling materials are arranged in the rectangular frames 28, and a plurality of anaerobic tanks 27 are arranged above the rectangular frames 28 in an array mode.

The plurality of anaerobic tanks 27 are arranged on the rectangular frame 28, black heat absorption coatings are coated on the peripheries of the plurality of anaerobic tanks 27, biogas slurry is filled in the plurality of anaerobic tanks 27, biogas conveying pipelines are respectively arranged on one sides of the plurality of anaerobic tanks 27 and converged on the biogas collecting pipe 21, and quick connectors are arranged between the anaerobic tanks 27 and the biogas conveying pipelines.

The discharger 17 comprises a helical blade, a rotary support 41 is arranged at the outlet part of the helical blade, at least one scraper 35 is fixedly arranged on the rotary support 41, a cutting edge is parallel to the inner side of the inverted cone discharging hopper 17, and the distance between the cutting edge and the inner side of the inverted cone discharging hopper 17 is less than 5 cm.

The air supply pipeline 20 extends to the bottom of the aerobic fermentation tank 14, the air in the air supply pipeline 20 is sourced from the blower 19, and a plurality of aeration discs 34 are arranged on the air supply pipeline 20 at the bottom of the aerobic fermentation tank 14 and supply oxygen to the aerobic zone.

Fig. 3 is a schematic view of the structure of the hollow gear. The driving part of the screw conveyer is arranged in the middle, a hollow gear 37 is fixedly connected to a main shaft of the screw conveyer, a transmission box 32 is provided with a transmission mechanism, the transmission motor 33 drives the hollow gear 37 to rotate through the transmission mechanism, 38 is a radial rib on the inner periphery of the hollow gear 37, an inclined knife 39 inclined with the surface of the hollow gear 37 is connected to the radial rib 38, and the inclined knife 39 is positioned on one side of the rotating direction and conveys organic fertilizer towards the direction of the discharger.

In the embodiment, the transmission case is used for meshing the transmission motor 33 and the hollow gear 37.

The biogas collecting pipe 21 is connected to the biogas storage tank 22 through a water removal tower 24 and a desulfurization tower 23, and 25 is a pipe frame of the biogas storage tank 22.

The discharging conveyor belt 16 is positioned right below the discharger 17, 16a is a roller of the discharging conveyor belt 16, the discharging conveyor belt 16 is synchronously opened and closed with a screw conveyer and a screw blade of the discharger 17, fig. 4 is a longitudinal section along a central axis of the discharger, and fig. 5 is a schematic view of a bottom structure of the discharger, the discharger 17 comprises a slewing bearing 41, the slewing bearing 41 comprises a rotating part 41a and a fixed part 41b, a driven gear is arranged on the periphery of the rotating part 41a and is meshed with a driving gear 48, the driving gear 48 is connected to an output shaft of a speed reducer 47, the speed reducer 47 is connected with a discharging motor 45, the speed reducer 47 is fixed with the discharging motor 45 through a driving part bracket 46, the driving part bracket 46 is fixed on a supporting plate 49, a scraper 37 is fixed on a rotating inner ring 50 and rotates around the inner periphery of the inverted cone discharging hopper 17, a main shaft 43 is fixed on the rotating inner ring 50 through a main shaft supporting frame 42, the periphery of the main shaft 42 is fixed with a helical blade 44, the helical blade 44 is driven by a discharging motor 45 to discharge, wherein the lower end of the inverted frustum discharging hopper is hermetically connected with the lower end of the rotating part 41a by a sealing gasket.

The aerobic biomass filler 36 and the anaerobic tank 27 with biogas slurry inside are hoisted by the crane 12, and the anaerobic tank 27 is also hoisted by the crane 12 when being unloaded, when hoisting or hoisting is carried out, the solar heat collecting plate 15 needs to be rotated to the opposite side by the crane 12 by taking the hinge shaft 26 as the axis, hoisting or hoisting is carried out, after the hoisting or hoisting is finished, the solar heat collecting plate 15 returns to the side receiving sunlight, and the solar heat collecting plate 15 after absorbing heat radiates the heat to the aerobic biomass filler 36 and the anaerobic tank 27, so that the temperature of the aerobic biomass filler and the anaerobic tank 27 is improved, and the fermentation speed is accelerated.

In this embodiment, the fermentation tank 14 is 29m wide and 4m high, the fermentation tank 14 is a steel product and is a cubic container with an insulating layer, biomass, flora, humidity and feces are proportioned to enable rapid fermentation, and the anaerobic tank 27 can be heated from the bottom.

Through modular combination, high-temperature and high-concentration dry fermentation can be realized, the gas yield reaches 3.5 per cubic tank per day, which is 7 times of the gas yield of the common Zhao gas engineering, and the structure is simple and convenient, the operation is easy to carry out, and the method is the first choice of large intensive biogas engineering.

The structure is open, the biogas fermentation capacity can be infinitely enlarged along the length direction of the cubic container, and the device and the method are one of the devices and the treatment methods for treating crop straws, branches and leaves of urban gardens, livestock and poultry manure, mess, overdue food, pharmaceutical wastes and the like with large treatment capacity.

In the examples, the biomass is subjected to a high temperature, high concentration dry-wet fermentation cycle of one month for a monthly periodical lifting. During hoisting, a quick connector (hose connector) of a biogas conveying pipeline is left at the top of the fermentation tank, so that the biogas conveying pipeline is connected to a biogas collecting pipe 21 after the anaerobic tank descends, and a butt joint hand of the quick connector of the hose between the biogas collecting pipe 21 and the biogas conveying pipeline on the anaerobic tank is manually connected.

The travelling crane 12 can be used for hoisting the aerobic biomass and the anaerobic tank 27 and rotating the solar heat collecting plate 15, and the aerobic biomass filler and the anaerobic tank 27 can be hoisted well by rotating the solar heat collecting plate 15 to one side of the supporting column; the solar radiation absorption can be increased by coating the heat absorption layers on the surfaces of the solar heat collection plate 15 and the anaerobic tank 27, the heat of sunlight can be transferred to the anaerobic tank 27 or the aerobic biomass filler, and meanwhile, the heat generated by fermentation of the aerobic biomass filler can be absorbed, so that anaerobic fermentation is promoted, and more biogas is generated; a plurality of vent holes 31 are arranged above a plurality of aeration discs 34 in the fermentation tank 14, so that the air is raised, the oxygen content is increased, and the fermentation speed is accelerated; the inverted cone discharging hopper 17 and the trapezoid funnel 29 are arranged at the bottom of the fermentation tank 14, so that the fermented organic fertilizer can be discharged conveniently, particularly, a spiral feeder is arranged in the trapezoid funnel 29, the discharger 17 is arranged on the discharge opening, the discharging speed can be accelerated, particularly, the organic fertilizer can be prevented from being adhered to the inner part of the inverted cone discharging hopper 17 by driving the scraper 35 through the rotary support, the discharging can be accelerated, and the organic fertilizer can be discharged on a conveyer belt in sequence; the plurality of screw conveyors face the inverted cone discharging hopper 17, so that the organic fertilizer can be conveyed into the hollow inverted cone, and the discharging is facilitated; by arranging the driving part of the screw conveyor in the middle, fixedly connecting the hollow gear 37 on the main shaft of the screw conveyor, the hollow gear 37 can be driven by the conveying motor 33 through a conveying mechanism, and meanwhile, the discharged materials can be conveyed to the inverted cone discharging hopper 17 through the hollow gear part 40; through filling natural pond liquid in anaerobic jar 27, can be under the situation of externally heating, produce marsh gas, marsh gas supplies agricultural production and the use of agricultural civilization life after desulfurization and dewatering, the utility model discloses, through the unified processing with straw, excrement and urine and rubbish from cooking, the natural pond liquid high temperature fermentation of filling in the fermentation cylinder is guaranteed to the heat that utilizes living beings aerobic fermentation to produce and the heat of solar energy to improve anaerobic fermentation's gas production rate, supply the required fuel energy of rural agriculture, meanwhile, through aerobic fermentation, also can produce required organic fertilizer and satisfy the required high efficiency fertilizer of agricultural production, this technique both reducible pollution, protection all ring edge borders environment, can realize satisfying the sustainable development's of agricultural production environment-friendly manufacturing again, can change waste into valuables, can keep ecological balance.

Claims (10)

1. Utilize biomass fermentation system of solar energy heating preparation organic fertilizer and marsh gas, including supply air duct, its characterized in that: the biomass fermentation system comprises a traveling crane, a solar heat collecting plate arranged in an inclined mode, a fermentation tank and an unloading conveying belt from top to bottom, wherein a plurality of anaerobic tanks, aerobic biomass fillers and a plurality of aeration discs are arranged in the fermentation tank from top to bottom, the bottom of the fermentation tank is an inverted cone discharge hopper, an unloader is arranged at the bottom of the inverted cone discharge hopper, a biogas conveying pipeline is connected onto the anaerobic tanks, and the aeration discs are communicated with an air supply pipeline.

2. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the fermentation cylinder is the cube structure, and the driving setting is on the peripheral support of fermentation cylinder.

3. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the solar heat collecting plates are obliquely arranged on one side facing south in a matrix state, hinged shafts are arranged below the multiple rows of solar heat collecting plates, corresponding supporting columns are arranged on the north side, and heat absorbing coatings are coated on the solar heat collecting plates.

4. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the fermentation cylinder is located on the bottom support, and a plurality of aeration dish tops are provided with a plurality of rectangular frame in the fermentation cylinder, and a plurality of rectangular frame below is provided with trapezoidal funnel respectively, and a plurality of trapezoidal funnel exports are provided with screw conveyer respectively, are provided with the air vent between a plurality of trapezoidal funnels, and screw conveyer is inboard towards the discharge hopper of fermentation tank bottom, is provided with good oxygen living beings stopping in the rectangular frame, and rectangular frame top array is provided with a plurality of anaerobic jars.

5. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the anaerobic tanks are arranged on the rectangular frame, black heat absorption coatings are coated on the peripheries of the anaerobic tanks, biogas slurry is filled in the anaerobic tanks, biogas conveying pipelines are respectively arranged on one sides of the anaerobic tanks and converged on a biogas collecting pipe, and quick connectors are arranged between the anaerobic tanks and the biogas conveying pipelines.

6. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the tripper includes helical blade, and helical blade sets up on slewing bearing, and slewing bearing is last to be fixed to be provided with at least one scraper, and the cutting edge is on a parallel with the back taper platform discharge hopper inboard, and the interval between cutting edge and the back taper platform discharge hopper inboard is less than 5 cm.

7. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the air supply pipeline extends to the bottom of the aerobic fermentation tank, and a plurality of aeration discs are arranged on the air supply pipeline at the bottom of the aerobic fermentation tank.

8. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the discharging conveyor belt is located under the discharger and is synchronous with the screw conveyor and the discharger, the discharger comprises a slewing bearing, a main shaft is fixed on a rotating inner ring of the slewing bearing through a main shaft support frame, and spiral blades are fixed on the periphery of the main shaft.

9. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 1, wherein: the driving part of the screw conveyer is arranged in the middle, a hollow gear is fixedly connected to a main shaft of the screw conveyer, and the conveying motor drives the hollow gear to rotate through the conveying mechanism.

10. The biomass fermentation system for producing organic fertilizer and biogas by solar heating according to claim 5, wherein: the biogas collecting pipe is connected to a biogas storage tower through a water removal tower and a desulfurization tower.

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