A fecal fermentation device

Abstract

This utility model relates to the field of fecal fermentation technology, specifically to a fecal fermentation device, including an inner fermentation tank with an electric heating plate fixed to its inner wall for heating; corrugated reinforcing ribs welded to the outer wall of the inner fermentation tank to enhance its strength; and rock wool board covering the corrugated reinforcing ribs and the tank wall, with its outer side bonded to the inner wall of the outer fermentation tank to form a heat insulation layer. The outer fermentation tank and the inner fermentation tank are simultaneously welded and fixed together by a top upper flange and a bottom lower flange to form an integrated structure. This design places the corrugated reinforcing ribs within the heat insulation layer, making the outer wall of the outer fermentation tank smooth and flat, avoiding the accumulation of pollutants and cleaning difficulties. The rock wool board reduces heat loss, the corrugated reinforcing ribs ensure the stability of the thin-walled structure, and the double flange fixing improves overall rigidity. While achieving lightweighting, structural strengthening, and optimized insulation, it significantly improves the ease of surface cleaning and hygiene safety.

Description

Technical Field

[0001] This utility model relates to the field of fecal fermentation technology, and in particular to a fecal fermentation device. Background Technology

[0002] Traditional manure fermentation devices generally employ a design approach of thickening the entire tank wall, intending to use a single thick-walled structure to resist the internal pressure generated by gas expansion during fermentation and the static load formed by the continuous accumulation of material. While this construction theoretically ensures mechanical strength, it inevitably leads to a significant increase in the weight of the tank. The increased weight directly drives up the procurement cost of stainless steel materials, and at the same time, more complex welding processes are required during manufacturing to ensure structural integrity. In actual deployment, the bulky tank places higher demands on the load-bearing capacity of transport vehicles and the specifications of on-site hoisting equipment, significantly increasing installation complexity and manpower input. A deeper impact lies in the deterioration of thermodynamic properties: the thicker metal wall absorbs excessive heat during the heating stage, delaying the rate of temperature rise inside the tank; during isothermal fermentation, the tank wall becomes a medium for continuous heat dissipation, forcing the heating system to operate at high load for extended periods to compensate for heat loss, resulting in energy waste.

[0003] To address the aforementioned issue of bulky structures, the industry is gradually shifting towards a technical approach of external, localized reinforcement. This involves welding regularly arranged metal ribs onto the outer surface of the tank as reinforcing ribs, or using large hydraulic equipment to press the entire tank wall into a continuous, undulating wave-like surface. This concentrates the originally evenly distributed stress distribution towards the peaks and troughs of the geometric structure. The core idea of ​​this design is to apply the principles of materials mechanics, allowing the reinforcing ribs or corrugated configuration to bear the main stress, thereby enabling a significant reduction in the base thickness of the tank wall. In practical applications, this strategy significantly reduces the weight of the empty tank while maintaining overall compressive strength, lessening the load on the installation foundation and reducing the amount of stainless steel used. Some case studies also show that the optimized thin-walled structure helps improve the sensitivity of the heating response to some extent.

[0004] However, this externally reinforced structure has led to a series of operational and maintenance drawbacks. The reinforcing ribs protruding from the tank surface and the recessed troughs create a complex and interwoven surface topography, which easily becomes a breeding ground for pollutants in the high humidity and dusty environment of the fermentation workshop. Sprayed and splashed manure mixtures seep into the gaps between the ribs and the corrugated grooves, and after drying, they form scale and harden. Volatile organic dust is adsorbed on the rough surface, mixing with condensate to breed microbial biofilm. Removing such pollutants is extremely difficult: conventional rinsing can only remove loose surface dirt, while stubborn residues embedded in structural gaps require repeated manual scrubbing with steel brushes and high-pressure water guns, and cannot completely eliminate the potential for microbial growth. Long-term accumulation of organic matter continues to corrode the metal surface under humid conditions, leading to localized rust and perforation, ultimately weakening the structural strength. More seriously, the accumulation of pollutants forms a heat insulation layer, partially offsetting the heat conduction advantages of the thin-walled design, creating a double burden of energy consumption and maintenance costs. This defect is particularly prominent in biological treatment scenarios that require regular disinfection, severely restricting the long-term reliability and hygiene and safety standards of the equipment. Utility Model Content

[0005] The purpose of this invention is to provide a fecal fermentation device that solves the problems of pollutants accumulating on the surface of the externally reinforced structure, forming unsanitary dead corners, being difficult to clean, breeding bacteria, and accelerating metal corrosion.

[0006] To achieve the above objectives, this utility model provides a fecal fermentation device, including an inner fermentation tank. An electric heating plate is fixedly installed inside the inner wall of the inner fermentation tank. Densely arranged corrugated reinforcing ribs are welded to the outer wall of the inner fermentation tank. A rock wool board is attached to the outer side of the inner fermentation tank to form a corrugated reinforcing rib wrapping structure. The outer side of the rock wool board is attached to the inner wall of the outer fermentation tank. An upper flange is welded to the top of both the outer fermentation tank and the inner fermentation tank. A lower flange is welded to the bottom of both the outer fermentation tank and the inner fermentation tank. After the upper flange and the lower flange are welded and fixed, the outer fermentation tank and the inner fermentation tank are integrated and fixed.

[0007] A suction pump is installed in the middle of the radial outer side of the outer fermentation tank by bolts. The suction end of the suction pump is equipped with a suction pipe, and its other end extends and penetrates into the lower part of the inner fermentation tank. The pumping end of the suction pump is equipped with a pumping pipe, and its other end extends and penetrates into the upper part of the inner fermentation tank.

[0008] A discharge pipe is installed radially below the outer fermentation tank, with one end extending through to the bottom of the inner fermentation tank. The top of the discharge pipe inside the inner fermentation tank is open.

[0009] The discharge pipe is located on the bottom surface of the outer side of the fermentation tank and is installed through it. A rotating motor is installed at the other end of the discharge pipe by bolts. The output end of the rotating motor is provided with a rotating rod that extends into the inner fermentation tank. A spiral blade is fixedly installed on the outside of the rotating rod.

[0010] The upper flange is bolted to a cover, and a drive motor is bolted to the middle of the cover. The output end of the drive motor is equipped with a stirring rod. The stirring rod extends and penetrates into the fermentation tank, and stirring blades are fixedly installed on its outer side.

[0011] A feed connector is installed through the top edge of the cap, an exhaust connector is installed through the top edge of the cap adjacent to the feed connector, and an expansion connector is installed through the top edge of the cap adjacent to the exhaust connector.

[0012] This invention relates to a manure fermentation device. Corrugated reinforcing ribs are welded and installed on the inner wall of the fermentation inner tank while maintaining a smooth outer wall. This conceals the ribs within the inner tank wall rather than exposing them to the outside. The ribs are densely distributed across the entire outer wall area of ​​the inner tank, and their geometric undulations directly transfer and disperse the static load and air pressure load of the material, allowing for a relatively thin wall thickness while ensuring mechanical strength. Subsequently, a continuous wrapping layer of rock wool board is applied to the entire outer side of the inner tank, tightly covering the entire outline of the corrugated reinforcing ribs. Simultaneously, the outer side of the rock wool board adheres to the inner wall of the outer tank. This structure ensures that the corrugated reinforcing ribs are sealed between the insulation layer (rock wool board) and the inner tank wall, keeping the outer wall of the outer tank smooth and free of protrusions.

[0013] Based on this structure, the outer fermentation tank and the inner fermentation tank are fixed together at the top and bottom by double welding with upper and lower flanges, integrating the inner tank, insulation layer, and outer tank into a rigid whole. This design eliminates the grooves and depressions formed on the surface of the tank by external reinforcing structures. The smooth outer wall of the tank prevents dust and sewage from finding physical attachment points, blocking the path for pollutant accumulation. Cleaning only requires a simple wipe to keep the surface clean, avoiding the maintenance burden of deep scraping in crevices required by traditional external structures, while also avoiding the risk of bacterial growth or metal corrosion due to incomplete cleaning. More importantly, the smooth surface maintains the stability of the tank's heat exchange efficiency. The rock wool board wrapping layer insulates the internal heat, and its smooth, unobstructed external structure protects the equipment from dirt and insulation layer interference during long-term operation, achieving simultaneous optimization of lightweight, high strength, and hygiene safety. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0016] Figure 2 This is a schematic diagram of the structure of the fermentation inner tank in an embodiment of this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the cover according to an embodiment of the present invention.

[0018] Figure 4 This is a schematic diagram of the overall planar structure of an embodiment of this utility model.

[0019] In the diagram: 101. Fermentation inner tank; 102. Electric heating plate; 103. Corrugated reinforcing rib; 104. Rock wool board; 105. Fermentation outer tank; 106. Upper flange; 107. Lower flange; 108. Suction pump; 109. Suction pipe; 110. Pumping pipe; 111. Discharge pipe; 112. Feeding pipe; 113. Rotary motor; 114. Rotating rod; 115. Spiral blade; 116. Cover; 117. Drive motor; 118. Stirring rod; 119. Stirring blade; 120. Feed connector; 121. Exhaust connector; 122. Expansion connector. Detailed Implementation

[0020] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0021] Please see Figures 1-4 .

[0022] This utility model provides a fecal fermentation device with a double-layer stainless steel structure. An electric heating plate 102 is fixedly installed inside the inner wall of the fermentation inner tank 101 to directly heat the internal materials during fermentation, providing a suitable temperature to activate microbial activity and ultimately dry the materials, ensuring efficient heat transfer and energy utilization. Densely arranged corrugated reinforcing ribs 103 are welded to the outer wall of the fermentation inner tank 101. These ribs enhance the rigidity and deformation resistance of the tank, while avoiding the need for any additional reinforcing structures on the outer wall of the fermentation outer tank 105, thus preventing the accumulation of pollutants or dust and facilitating daily cleaning and maintenance.

[0023] The outer side of the fermentation inner tank 101 is completely covered with rock wool board 104, forming a tight wrapping layer of corrugated reinforcing ribs 103. The outer side of the rock wool board 104 is directly attached to the inner wall of the fermentation outer tank 105, providing heat insulation and reducing heat loss, thus optimizing the efficiency of the electric heating plate 102. An upper flange 106 is welded to the top of both the fermentation outer tank 105 and the fermentation inner tank 101, and a lower flange 107 is welded to the bottom. After the upper flange 106 and lower flange 107 are welded and fixed, the fermentation outer tank 105 and the fermentation inner tank 101 form an integrated rigid frame, providing overall stability and sealing to prevent leakage. A suction pump 108 is bolted to the center of the radial outer side of the fermentation outer tank 105. The suction end of the suction pump 108 has a suction pipe 109, the other end of which extends into the lower part of the fermentation inner tank 101. This is used to extract material from the bottom for circulation during the initial fermentation stage. The pumping end of the suction pump 108 has a pumping pipe 110, the other end of which extends into the upper part of the fermentation inner tank 101. This pumping pipe can pump material to the upper part, achieving initial circulation suction and ensuring uniform mixing of fecal particles and liquid, preventing sedimentation or clumping. A discharge pipe 111 is installed radially below the outer outer side of the fermentation outer tank 105. One end of the discharge pipe 111 extends into the bottom surface of the fermentation inner tank 101. The top surface of the discharge pipe 111 inside the fermentation inner tank 101 is open, serving as a material collection channel. A discharge pipe 112 is installed on the bottom surface of the discharge pipe 111 on the outer side of the fermentation outer tank 105 for final discharge.

[0024] A rotating motor 113 is bolted to the other end of the discharge pipe 111. A rotating rod 114 extends from the output end of the rotating motor 113 into the fermentation inner tank 101. A spiral blade 115 is fixedly installed on the outer side of the rotating rod 114. The spiral blade 115 rotates during the drying stage, stirring the fermented manure material from the inside and pushing it to the discharge pipe 111 and the discharge pipe 112 for discharge, achieving a continuous and smooth discharge mechanism. A cap 116 is bolted to the top of the upper flange 106, providing a removable seal. A drive motor 117 is bolted to the center of the top of the cap 116. A stirring rod 118 extends from the output end of the drive motor 117 into the fermentation inner tank 101. A stirring blade 119 is fixedly installed on the outer side of the stirring rod 118. After the drive motor 117 starts, it drives the stirring blade 119 to rotate, continuously stirring the material during fermentation to ensure uniform distribution of the mixture and optimize microbial fermentation conditions. A feed connector 120 is installed through the top edge of the cap 116 for adding manure material; an exhaust connector 121 is installed through the top edge of the cap 116 adjacent to the feed connector 120 to release volatile gases produced during fermentation and prevent internal pressure buildup; an expansion connector 122 is installed through the top edge of the cap 116 adjacent to the exhaust connector 121 as a reserved interface for adding fermentation aids or connecting monitoring equipment to improve operational flexibility.

[0025] The drive motor 117 and stirring blade 119 ensure uniform mixing of materials, the electric heating plate 102 provides heating and drying functions, the suction pump 108 realizes initial circulation suction, the double-layer barrel and rock wool board 104 ensure heat preservation and convenient maintenance, and the rotating motor 113 drives the spiral blade 115 to complete the efficient discharge after drying. The entire device realizes the integrated treatment process of manure mixing, heating fermentation, drying and controllable discharge.

[0026] Working principle: Fecal material is added into the fermentation inner tank 101 through the feed connector 120. During fermentation, the drive motor 117 starts, driving the stirring rod 118 to rotate, thereby driving the stirring blade 119 to fully stir the material inside the fermentation inner tank 101. This mechanical stirring action can promote the uniform distribution and full contact of the material, optimize the microbial fermentation conditions, and accelerate the decomposition efficiency of organic matter.

[0027] The electric heating plate 102, fixedly installed inside the fermentation tank 101, is activated simultaneously to directly heat the materials inside. This electric heating plate 102 provides a suitable temperature to activate microbial activity in the early stages of fermentation by conducting heat, and later transforms into a drying stage to remove excess moisture from the materials, achieving integrated fermentation and drying. In the early stages of fermentation, to further improve mixing uniformity, the suction pump 108 is activated. The suction pipe 109 of the suction pump 108 extends to the lower part of the fermentation tank 101, extracting the bottom material, and then pumping it to the upper part of the fermentation tank 101 through the pumping pipe 110, forming a circulating flow. This circulating suction mechanism can quickly break up material stratification in the early stages, ensuring thorough mixing of solid particles and liquid components. Especially for feces containing particles, the suction capacity of the suction pump 108 avoids sedimentation and clumping, shortening the fermentation start-up time.

[0028] Volatile gases generated during fermentation are discharged through exhaust connector 121 to prevent excessive internal pressure from affecting the fermentation effect. Simultaneously, expansion connector 122 serves as a reserved interface for adding fermentation aids or connecting monitoring equipment, improving operational flexibility and controllability. After overall fermentation is complete, the material gradually dries. At this point, the rotating motor 113 starts, and its output rotating rod 114 drives the spiral blades 115 to rotate. The spiral blades 115 are located on the bottom surface inside the fermentation inner tank 101. During rotation, they agitate the dried manure material and push it to the discharge pipe 111. Because one end of the discharge pipe 111 extends to the bottom surface inside the fermentation inner tank 101 and its top surface is open, the material can smoothly enter the discharge pipe 111 and then be discharged through the discharge pipe 112. This design ensures continuous and smooth discharge, prevents blockages, and reduces the risk of residue.

[0029] The entire device adopts a double-layer stainless steel structure. Densely arranged corrugated reinforcing ribs 103 are welded to the outer wall of the fermentation inner tank 101, increasing the rigidity and deformation resistance of the tank. Rock wool board 104 is attached to the outside of the fermentation inner tank 101, tightly wrapping the corrugated reinforcing ribs 103 and adhering to the inner wall of the fermentation outer tank 105, forming a heat insulation layer. This effectively reduces heat loss and improves the heating efficiency of the electric heating plate 102. Simultaneously, the placement of the corrugated reinforcing ribs 103 internally ensures a smooth outer wall of the fermentation outer tank 105, eliminating the need for additional reinforcement structures and preventing the accumulation of contaminants or dust in the gaps, simplifying cleaning and maintenance. The fermentation outer tank 105 and fermentation inner tank 101 are simultaneously welded and fixed together via upper flange 106 and lower flange 107, forming an integrated structure that ensures overall stability and sealing. The cover 116 is bolted to the top of the upper flange 106 for easy disassembly and maintenance.

[0030] Throughout the process, the mixing system ensures uniform mixing, the heating and suction circulation optimizes fermentation efficiency, the double-layer structure and rock wool board 104 provide insulation to improve thermal efficiency, and the rotating motor 113 drives the spiral blades 115 to achieve residue-free discharge. Overall, it achieves efficient fermentation, drying and controllable treatment of manure, and the structural design takes into account both functionality and ease of maintenance.

[0031] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A fecal fermentation device, comprising a fermentation inner tank (101), characterized in that: An electric heating plate (102) is fixedly installed inside the inner wall of the fermentation inner barrel (101). Densely arranged corrugated reinforcing ribs (103) are welded and installed on the outer wall of the fermentation inner barrel (101). A rock wool board (104) is attached to the outer side of the fermentation inner barrel (101) to form a wrapping structure of the corrugated reinforcing ribs (103). The outer side of the rock wool board (104) is attached to the inner wall of the fermentation outer barrel (105). An upper flange (106) is welded and installed at the top of both the fermentation outer barrel (105) and the fermentation inner barrel (101). A lower flange (107) is welded and installed at the bottom of both the fermentation outer barrel (105) and the fermentation inner barrel (101). After the upper flange (106) and the lower flange (107) are welded and fixed, the fermentation outer barrel (105) and the fermentation inner barrel (101) are integrated and fixed.

2. The fecal fermentation device as described in claim 1, characterized in that: A suction pump (108) is bolted to the center of the radial outer side of the outer fermentation tank (105). The suction end of the suction pump (108) is provided with a suction pipe (109), and its other end extends and penetrates into the lower part of the inner fermentation tank (101). The pumping end of the suction pump (108) is provided with a pumping pipe (110), and its other end extends and penetrates into the upper part of the inner fermentation tank (101).

3. The fecal fermentation device as described in claim 2, characterized in that: A discharge pipe (111) is installed through the lower radial side of the outer fermentation tank (105). One end of the discharge pipe (111) extends through the bottom of the inner fermentation tank (101), and the top surface of the discharge pipe (111) inside the inner fermentation tank (101) is open.

4. The fecal fermentation device as described in claim 3, characterized in that: The discharge pipe (111) is located on the bottom surface of the outer side of the fermentation outer tank (105) and a feed pipe (112) is installed through it. The other end of the discharge pipe (111) is equipped with a rotating motor (113) by bolts. The output end of the rotating motor (113) is provided with a rotating rod (114) and extends into the fermentation inner tank (101). A spiral blade (115) is fixedly installed on the outside of the rotating rod (114).

5. The fecal fermentation device as described in claim 4, characterized in that: The top of the upper flange (106) is bolted to a cover (116), and the top center of the cover (116) is bolted to a drive motor (117). The output end of the drive motor (117) is provided with a stirring rod (118). The stirring rod (118) extends and penetrates into the fermentation inner tank (101), and a stirring blade (119) is fixedly installed on its outer side.

6. The fecal fermentation device as described in claim 5, characterized in that: A feed connector (120) is installed through the top edge of the cover (116), an exhaust connector (121) is installed through the top edge of the cover (116) adjacent to the feed connector (120), and an expansion connector (122) is installed through the top edge of the cover (116) adjacent to the exhaust connector (121).

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