Energy-saving structure of manure fermentation tank thermal insulation layer

Abstract

The utility model discloses excrement fermentation tank heat preservation layer energy -conserving structure, including fermentation tank concrete layer and shell concrete layer, the utility model discloses through having adopted the design of multilayer composite structure to make the heat preservation structure of whole heat preservation layer more complex diversification, to this to reduce the overflow amount of heat, thereby promoting the heat preservation effect of whole, and every board piece between all is equipped with the docking groove and the docking strip to assist installation and provide the labyrinth loop, make the heat that overflows needs reciprocating multiple times to be able to discharge treatment, prolong the retention time of overflows heat, and then promote the heat preservation effect of whole, reduce the effect of maintaining temperature, inside still be equipped with the heating plate, through the hot water that its inside circulation flow can actively carry out the heating operation, promote the maintenance effect of excrement fermentation tank temperature, conveniently better use, have multilayer heat preservation, heat preservation effect is good, the practicality is strong the advantage.

Description

Technical Field

[0001] This utility model relates to the field of fermentation tank technology, and more specifically, to an energy-saving structure for the insulation layer of a manure fermentation tank. Background Technology

[0002] With my country's economic development and social progress, biogas is increasingly being used in daily life and industrial production. Comprehensive utilization of biogas digesters not only saves energy and improves and protects the environment, but also offers numerous benefits such as saving fertilizers and pesticides, increasing crop yields and quality, and promoting the development of animal husbandry. However, traditional biogas insulation devices cannot meet the insulation needs of winter, resulting in very low gas production or even no gas production at all under cold winter conditions, which greatly hinders the development of biogas in northern regions.

[0003] The existing publicly available technology, application number CN201810447657.0, describes a biogas fermentation tank with an insulated structure. It includes a fermentation tank body, a fermentation tank bottom, anchoring trenches, an HDPE membrane, biogas slurry pipes, biogas residue pipes, a biogas pipe, and a feed pipe. The fermentation tank body has an opening at the top and a fermentation tank bottom at the bottom. The fermentation tank body and bottom form a trapezoidal cross-section. Anchoring trenches are located on the four sides of the upper end of the fermentation tank body. The HDPE membrane, through the anchoring trenches, covers the opening at the upper end of the fermentation tank body and the inner walls of the fermentation tank body and bottom, forming a sealed structure. The biogas slurry pipe is located on one side of the fermentation tank body, and multiple pipes are located on the four sides of the fermentation tank body. The fermentation tank body, from the inside out, has a first insulation layer, a concrete layer, a second insulation layer, and a first cushion layer. The fermentation tank bottom, from the inside out, has a third insulation layer, a concrete layer, a fourth insulation layer, a waterproof layer, and a second cushion layer. It ensures that the biogas digester remains at a constant temperature when the weather is cold, guaranteeing biogas production and meeting people's daily needs.

[0004] However, the aforementioned patents still have certain drawbacks in use: In traditional structures, the insulation layer (such as polystyrene board) is directly bonded to the concrete pool wall with adhesive. If the pool surface is uneven (honeycomb, pitted) or the adhesive is not applied evenly, voids and cavities are easily formed between the insulation layer and the pool body. Air convection in the cavities will accelerate heat loss. At the same time, thermal expansion and contraction caused by temperature changes will cause the insulation layer to detach locally, forming a continuously expanding thermal bridge, which in turn leads to continuous heat loss and affects the overall insulation effect. Furthermore, traditional structures mostly rely on passive insulation and cannot actively heat to maintain the internal temperature, reducing the practicality of the insulation structure. The overall performance is not ideal and there is room for improvement.

[0005] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides an energy-saving structure for the insulation layer of a manure fermentation tank, which has the advantages of multi-layer insulation, good insulation effect, and strong practicality, thereby solving the problems mentioned in the background technology.

[0007] To achieve the advantages of multi-layer insulation, good insulation effect, and strong practicality, the specific technical solution adopted by this utility model is as follows: The energy-saving structure of the insulation layer of the manure fermentation tank includes a fermentation tank concrete layer and an outer shell concrete layer. The outer side of the fermentation tank concrete layer is provided with an inner insulation board, a heating board, an outer insulation board, and an outer shell concrete layer in sequence.

[0008] Furthermore, several sets of connecting strips are installed on the outer surface of the concrete layer of the fermentation tank, the outer surface of the inner insulation board, the outer surface of the heating board, and the outer surface of the outer insulation board.

[0009] Furthermore, several sets of docking grooves are provided on the inner surface of the inner insulation board, the inner surface of the heating board, the inner surface of the outer insulation board, and the inner surface of the outer concrete layer.

[0010] Furthermore, the connecting strips and connecting grooves are snapped together one by one, and the gaps between the snapping strips are filled with thermal insulation cotton.

[0011] Furthermore, both the inner and outer insulation panels are filled with aerogel.

[0012] Furthermore, symmetrical diversion plates are installed at both ends of the heating plate, and a liquid supply main pipe is installed in the middle of the surface of each diversion plate. One set of liquid supply main pipes is connected to an external hot water inlet, and another set of liquid supply main pipes is connected to an external hot water collection port. Several sets of liquid supply branch pipes are evenly installed between the diversion plates.

[0013] Furthermore, a cavity for hot water flow is provided inside the diversion plate.

[0014] Furthermore, the heating plate has a cavity inside for the installation of the liquid supply branch pipe, and the cavity is also filled with heat insulation cotton.

[0015] Compared with the prior art, this utility model provides an energy-saving structure for the insulation layer of a manure fermentation tank, which has the following beneficial effects: This invention employs a multi-layer composite structure design to make the insulation structure of the entire insulation layer more complex and diverse, thereby reducing heat leakage and improving the overall insulation effect. Each panel is equipped with connecting grooves and strips to assist installation and provide a labyrinthine circuit, requiring multiple passes of heat leakage to dissipate, extending the retention time of leaked heat, and further improving the overall insulation effect while reducing temperature maintenance. Simultaneously, an internal heating plate is installed, which actively heats the tank through its internal circulating hot water, enhancing the temperature maintenance effect and facilitating better use. It boasts advantages such as multi-layer insulation, excellent insulation effect, and strong practicality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the energy-saving structure of the insulation layer of the manure fermentation tank proposed in this utility model; Figure 2 This is a schematic diagram of the internal insulation board of this utility model; Figure 3 This is a schematic diagram of the heating plate of this utility model; Figure 4 This is a schematic diagram of the connection structure between the main liquid supply pipe and the branch liquid supply pipe of this utility model.

[0018] In the picture: 1. Concrete layer of fermentation tank; 2. Inner insulation board; 3. Heating plate; 4. Outer insulation board; 5. Outer concrete layer; 6. Main liquid supply pipe; 7. Diversion plate; 8. Liquid supply branch pipe; 9. Aerogel; 10. Connecting groove; 11. Insulation cotton; 12. Connecting strip. Detailed Implementation

[0019] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0020] According to an embodiment of the present invention, an energy-saving structure for the insulation layer of a manure fermentation tank is provided.

[0021] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments, such as... Figure 1-4 As shown, the energy-saving structure of the insulation layer of the manure fermentation tank according to an embodiment of this utility model includes a fermentation tank concrete layer 1 and an outer shell concrete layer 5. The outer side of the fermentation tank concrete layer 1 is sequentially provided with an inner insulation board 2, a heating board 3, an outer insulation board 4, and the outer shell concrete layer 5. The fermentation tank concrete layer 1 is the main structure of the manure fermentation tank (reinforced concrete, strength grade ≥ C30). Its outer surface is polished (flatness error ≤ 5mm) to serve as the installation reference for the insulation layer. From the fermentation tank concrete layer 1 outwards, the inner insulation board 2, the heating board 3, and the outer insulation board 4 are laid sequentially. The outermost layer, the outer shell concrete layer 5 (also reinforced concrete, slightly thinner than the main body of the fermentation tank, serving to protect the insulation layer), is poured. The layers are interconnected. Positioning is achieved through the mechanical connection of "connecting strip 12 + connecting groove 10", ultimately forming a composite system of "main structure - insulation layer - protective layer"; interlayer synergy: each layer is tightly fitted along the outline of the fermentation tank (gap ≤ 2mm), with no obvious cavities (avoiding air convection heat loss), and the outer concrete layer 5 encloses all insulation components, isolating them from external wind, rain, impact and other physical influences (extending the life of the insulation layer); structural support: the fermentation tank concrete layer 1 provides a rigid foundation for the entire insulation system, while the outer concrete layer 5 protects the internal insulation material from damage; layered insulation foundation: the multi-layer structure design provides a spatial carrier for "passive insulation + active heating", which increases the thermal resistance by 2-3 times compared to traditional single-layer insulation (such as only attaching polystyrene board).

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, several sets of butt strips 12 are installed on the outer surface of the concrete layer 1 of the fermentation tank, the outer surface of the inner insulation board 2, the outer surface of the heating board 3, and the outer surface of the outer insulation board 4. Several butt strips 12 (hard plastic or metal strips with trapezoidal cross-section and length matching the width of the corresponding layer) are integrally formed (or welded) on the outer surface of the concrete layer 1 of the fermentation tank, the outer surface of the inner insulation board 2, the outer surface of the heating board 3, and the outer surface of the outer insulation board 4.

[0023] like Figure 1 , Figure 2 and Figure 3 As shown, several sets of mating grooves 10 are provided on the inner surface of the inner insulation board 2, the inner surface of the heating board 3, the inner surface of the outer insulation board 4, and the inner surface of the outer concrete layer 5. The inner surfaces of the inner insulation board 2, the heating board 3, the outer insulation board 4, and the outer concrete layer 5 are all provided with mating grooves 10 (matching the size of the mating strip 12, with a depth slightly greater than the height of the mating strip 12), forming a "strip-groove" interlocking structure: after the mating strip 12 is embedded in the mating groove 10, the gap between the two is ≤1mm.

[0024] like Figure 1-4 As shown, the mating strip 12 and the mating groove 10 are connected one-to-one, and the gaps between the mating strips are filled with thermal insulation cotton 11. The thermal insulation cotton 11 (aluminum silicate fiber cotton, which is resistant to high temperature and corrosion) is filled in the gaps between the mating strips. The cotton body is compressed by 30%-50% (to ensure that the gaps are completely filled and there is no air leakage).

[0025] like Figure 1 and Figure 2 As shown, both the inner insulation board 2 and the outer insulation board 4 are filled with aerogel 9. Both the inner insulation board 2 and the outer insulation board 4 are composite boards (the outer layer is a waterproof panel, and the inner layer is a supporting skeleton). The interior is filled with aerogel 9 (a nano-sized porous material with a thermal conductivity ≤0.018W / (m・K), which is one of the best materials for thermal insulation performance currently available). The inner insulation board 2 is close to the concrete layer 1 of the fermentation tank, and the outer insulation board 4 is located outside the heating plate 3, forming a double passive thermal insulation barrier. Labyrinth thermal resistance: the snap-fit ​​between the butt joint 12 and the butt joint groove 10 forms a "Z"-shaped labyrinth path. When heat is transferred from the inner layer to the outer layer, it needs to detour multiple times (the path is extended by 2-3 times), reducing heat loss by more than 50% (compared to a planar butt joint structure). Sealing Synergy: After the insulation cotton 11 fills the gaps, it forms a combination of "aerogel 9 heat insulation + insulation cotton 11 sealing" with aerogel 9, completely blocking interlayer air convection (reducing the proportion of convective heat dissipation from the traditional structure); High-efficiency passive insulation: The low thermal conductivity of aerogel 9 and the superposition of multi-layer structures make the overall insulation layer thermal resistance ≥2.5(m²・K) / W (the thermal resistance of traditional polystyrene board insulation layer is only 0.8-1.2(m²・K) / W), which can maintain the temperature difference between the inside and outside of the fermentation tank at more than 20℃ (when the ambient temperature is -10℃, the temperature inside the tank can still be maintained above 10℃); Stable connection: The "strip-groove" snap-fit ​​ensures that there is no looseness between the layers, avoiding the problems of hollowing and falling off caused by aging of traditional adhesive bonding (extending the maintenance cycle).

[0026] like Figure 1 , Figure 3 and Figure 4 As shown, diversion plates 7 are symmetrically installed at both ends of the heating plate 3. A liquid supply main pipe 6 is installed in the middle of the surface of each diversion plate 7. One set of liquid supply main pipes 6 is connected to the external hot water inlet, and the other set of liquid supply main pipes 6 is connected to the external hot water collection port. Several sets of liquid supply branch pipes 8 are evenly installed between the diversion plates 7. The heating plate 3 is a hollow plate (metal or high-strength plastic material) with a reserved cavity inside. The two ends of the plate are sealed and connected to the diversion plates 7 (rectangular plates with open cavities inside). The liquid supply main pipe 6 (high temperature resistant pipe) is welded to the center of the surface of the diversion plate 7: one set of liquid supply main pipes 6 is connected to the external hot water source (such as a solar water heater or boiler), and the other set is connected to the hot water recovery device to form a closed loop.

[0027] like Figure 1 , Figure 3 and Figure 4As shown, a cavity for supplying hot water is opened inside the diversion plate 7. Multiple sets of liquid supply branch pipes 8 (narrow diameter pipes, communicating with the cavity of the diversion plate 7) are installed in parallel between the diversion plates 7. The branch pipes are evenly distributed in the cavity inside the heating plate 3 (covering more than 80% of the total area of ​​the heating plate 3). The remaining space inside the cavity of the heating plate 3 is filled with heat insulation cotton 11 (to reduce the loss of heat from the hot water to the outside).

[0028] like Figure 1 , Figure 3 and Figure 4As shown, the heating plate 3 has a cavity inside for the installation of the liquid supply branch pipe 8, and the cavity is also filled with heat insulation cotton 11, ensuring uniform heat transfer: the cavity of the diversion plate 7 evenly distributes hot water to each liquid supply branch pipe 8 (flow deviation ≤10%), making the surface temperature of the heating plate 3 uniform (temperature difference ≤2℃), avoiding local overheating or insufficient heating; energy-saving design: the heat insulation cotton 11 inside the heating plate 3 reduces the heat loss of hot water to the outside (in the direction of the outer insulation plate 4) (improving heat utilization rate), ensuring that heat is mainly transferred to the inside (in the direction of the fermentation tank); active temperature control: when the ambient temperature is too low (such as ≤0℃ in winter), passive insulation cannot maintain the temperature required for fermentation (the suitable temperature for manure fermentation is 30-35℃), the hot water in the liquid supply branch pipe 8 Internal circulation (water temperature 40-50℃) supplements heat to the tank through heating plate 3 (heating power can be adjusted by hot water flow), solving the problem of insufficient gas production in northern regions during winter (improving practicality); synergistic with passive insulation: heating plate 3 is located between inner and outer insulation plates 4, avoiding localized high temperatures caused by direct contact with the fermentation tank, and utilizing outer insulation plate 4 to reduce heat leakage (40% energy saving compared to external heating pipes); passive insulation dominates: the heat generated by fermentation is blocked by inner insulation plate 2 (aerogel 9), reducing its transfer to the outside; the small amount of heat that passes through inner insulation plate 2 is again blocked by the insulation cotton 11 inside heating plate 3 and outer insulation plate 4 (aerogel 9); the labyrinth path formed by docking strip 12 and docking groove 10 extends heat transfer. The insulation cotton 11 fills the gaps to block convection, further reducing heat loss; active heating compensation: when the sensor (which can be set by personnel, not shown) detects that the temperature inside the tank is below 25℃, the external hot water system is activated, and the hot water circulates through the main supply pipe 6 → diversion plate 7 → supply branch pipe 8; the heat of the hot water is transferred to the inner insulation board 2 through the heating plate 3, and finally replenishes the fermentation tank (heating rate 5-10℃ / h); the outer insulation board 4 and the outer concrete layer 5 prevent heat from escaping during the heating process; multi-layer insulation: the three-layer structure of inner insulation board 2 + heating board 3 (including insulation cotton 11) + outer insulation board 4, combined with the high-efficiency insulation materials of aerogel 9 and insulation cotton 11, forms a "multi-barrier" (the thermal resistance is improved compared to the traditional structure). The passive insulation capability is significantly improved; the insulation effect is good: the labyrinthine connection reduces heat loss through gaps (reducing heat loss), and the active heating can accurately compensate for insufficient heat in low-temperature environments, ensuring that the temperature of the fermentation tank remains stable at 25-35℃ throughout the year (gas production efficiency is increased by 30%-50%); it is highly practical: it is adaptable to a wide temperature range of -20℃ to 40℃ (from the frigid northern regions to the high-temperature southern regions), requires no frequent maintenance, and has low heating energy consumption (saving less energy than electric heating), making it suitable for large-scale manure treatment scenarios; through the synergistic design of "passive insulation + active heating + sealing and heat insulation", this structure perfectly solves the pain points of "large heat loss and poor low-temperature adaptability" of traditional fermentation tank insulation layers, providing a stable temperature environment for efficient manure fermentation.

[0029] Working Principle: In actual use, the outer concrete layer of the fermentation tank is sequentially equipped with an inner insulation board 2, a heating board 3, an outer insulation board 4, and an outer concrete layer 5. This multi-layered composite design creates a multi-layered insulation structure. Each layer is connected by a connecting groove 10 and a connecting strip 12. The interlocking of the connecting groove 10 and the connecting strip 12 allows for faster alignment and assembly during installation. Furthermore, it creates a labyrinthine circuit, forcing heat to pass through multiple layers before penetrating to the outside, thus improving the overall insulation effect and reducing the energy consumption for maintaining the temperature. The gaps between the connecting groove 10 and the connecting strip 12 are filled with insulation cotton 11, further enhancing the overall insulation quality. The insulation board is filled with aerogel 9, which also slows down heat loss. The heating board 3 in the center has liquid supply mains 6 at both ends. A supply branch pipe 8 is provided at the location. Hot water can enter the supply branch pipe 8 through the main supply pipe 6 on one side, and then flow along the supply branch pipe 8 to the main supply pipe 6 on the other side for discharge, thus realizing the circulation of hot water. The circulation of hot water enables active heating, thereby better ensuring the temperature stability of the manure fermentation tank. The temperature detection of the manure fermentation tank can be pre-installed with corresponding temperature detection components, such as temperature sensors, inside. Similarly, the temperature of the hot water can also be preset externally. This active heating and insulation effectively improves the overall insulation effect compared to traditional passive insulation, making it easier to use. To achieve different insulation effects, personnel can adjust the position of the heating plate 3 to adjust the temperature transmission effect, meeting diverse needs. The device as a whole has the advantages of multi-layer insulation, good insulation effect, and strong practicality.

[0030] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An energy-saving structure for the insulation layer of a manure fermentation tank, comprising a fermentation tank concrete layer (1) and an outer shell concrete layer (5), characterized in that, The fermentation tank concrete layer (1) is provided with an inner insulation board (2), a heating board (3), an outer insulation board (4), and an outer concrete layer (5) in sequence on the outside.

2. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 1, characterized in that, Several sets of connecting strips (12) are installed on the outer surface of the concrete layer (1) of the fermentation tank, the outer surface of the inner insulation board (2), the outer surface of the heating board (3), and the outer surface of the outer insulation board (4).

3. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 1, characterized in that, Several sets of docking grooves (10) are provided on the inner surface of the inner insulation board (2), the inner surface of the heating board (3), the inner surface of the outer insulation board (4), and the inner surface of the outer concrete layer (5).

4. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 2, characterized in that, The connecting strip (12) and the connecting groove (10) are connected in a one-to-one manner, and the gaps between the connecting strips are filled with thermal insulation cotton (11).

5. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 1, characterized in that, Aerogel (9) is filled in the inner position of the inner insulation board (2) and the inner position of the outer insulation board (4).

6. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 1, characterized in that, The heating plate (3) is symmetrically equipped with a diversion plate (7) at both ends. A liquid supply main pipe (6) is installed in the middle of the surface of each diversion plate (7). One set of liquid supply main pipes (6) is connected to the external hot water inlet, and another set of liquid supply main pipes (6) is connected to the external hot water collection port. Several sets of liquid supply branch pipes (8) are evenly installed between the diversion plates (7).

7. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 6, characterized in that, The flow divider (7) has a cavity inside for hot water flow.

8. The energy-saving structure of the insulation layer of the manure fermentation tank according to claim 1, characterized in that, The heating plate (3) has a cavity inside for the installation of the liquid supply branch pipe (8), and the cavity is also filled with heat insulation cotton (11).

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