An optimization method, device and system for a high-water-content organic solid waste drying system

Abstract

The present application relates to the technical field of high-moisture organic solid waste drying, and particularly relates to a method, device and system for optimizing a high-moisture organic solid waste drying system. The technical solution adjusts the setting position and quantity of the drying equipment in the sunlight shed to optimize the temperature field, humidity field and flow field, thereby enhancing the water mass transfer process to improve the drying efficiency of the high-moisture organic solid waste. Meanwhile, modeling (i.e., flow model, component model and heat transfer model) of the physical and chemical changes, heat transfer and water migration of the high-moisture organic solid waste can better understand the physical mechanism in the drying process, thereby optimizing the design of the sunlight shed. Therefore, the above technical solution can improve the drying efficiency and optimize the position and quantity of the drying equipment in the high-moisture organic solid waste drying system.

Description

Technical Field

[0001] The present invention relates to the technical field of high-water-content organic solid waste measurement, and in particular to an optimization method, device and system for a high-water-content organic solid waste drying system. Background Art

[0002] High-water content organic solid waste (HWS) refers to waste generated during production and daily life, including municipal waste, printing and dyeing waste, river waste, livestock manure, distiller's grains, oil sludge, and food waste. HWSS is characterized by high water content and is characterized by: 1) It is highly polluting, prone to spoilage and deterioration, breeding mosquitoes and pathogens, and posing a significant threat to environmental protection and public health; 2) It is in short supply, with annual production often reaching tens or even billions of tons. Existing disposal capacity is severely insufficient, disposal technology is outdated, and in some areas, landfill is still the primary method of disposal.

[0003] In the related art, no technical solution has been found for optimizing the drying equipment (such as fans, dryers and other drying equipment) in the high-water content organic solid waste drying system. Summary of the Invention

[0004] The present invention provides a method, device and system for optimizing a high-water-content organic solid waste drying system, which can optimize the position and quantity of drying equipment in the high-water-content organic solid waste drying system.

[0005] In a first aspect, an embodiment of the present invention provides an optimization method for a high-water-content organic solid waste drying system, the high-water-content organic solid waste drying system comprising a sun shed, a target mixture laid in the sun shed, and a drying device disposed in the sun shed, the target mixture comprising high-water-content organic solid waste to be dried, target organic matter, and target bacterial species, the target organic matter being used to provide a carbon source for the target bacterial species, and the target bacterial species being used to degrade organic matter in the high-water-content organic solid waste and increase the porosity and specific surface area of ​​the high-water-content organic solid waste;

[0006] The optimization method comprises:

[0007] Meshing the sun shed in Fluent software;

[0008] Selecting a target mathematical model in the Fluent software; wherein the target mathematical model includes a flow model, a component model, and a heat transfer model;

[0009] Determining boundary conditions in the Fluent software and assigning values ​​to the boundary conditions; wherein the boundary conditions include the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste, and the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed;

[0010] Numerical simulation is performed on the drying process of the high-water content organic solid waste to obtain the flow field, humidity field, and temperature field in the sun shed;

[0011] Based on the flow field, humidity field and temperature field in the sun shed, the position and quantity of drying equipment in the high-water content organic solid waste drying system are optimized.

[0012] In a second aspect, an embodiment of the present invention provides a method for measuring the property parameters of high-water-content organic solid waste, wherein the high-water-content organic solid waste drying system includes a sun shed, a target mixture laid in the sun shed, and a drying device arranged in the sun shed, wherein the target mixture includes high-water-content organic solid waste to be dried, target organic matter, and target bacterial species, wherein the target organic matter is used to provide a carbon source for the target bacterial species, and the target bacterial species is used to degrade organic matter in the high-water-content organic solid waste and increase the porosity and specific surface area of ​​the high-water-content organic solid waste;

[0013] The optimization device comprises:

[0014] A partitioning module, used for performing grid partitioning on the sun shed in Fluent software;

[0015] A selection module, configured to select a target mathematical model in the Fluent software; wherein the target mathematical model includes a flow model, a component model, and a heat transfer model;

[0016] An assignment module, configured to determine boundary conditions in the Fluent software and assign values ​​to the boundary conditions; wherein the boundary conditions include the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste, and the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed;

[0017] A simulation module is used to perform numerical simulation on the drying process of the high-water content organic solid waste to obtain the flow field, humidity field, and temperature field in the sun shed;

[0018] The optimization module is used to optimize the position and quantity of drying equipment in the high-water content organic solid waste drying system based on the flow field, humidity field and temperature field in the sun shed.

[0019] In a third aspect, an embodiment of the present invention provides a high-water content organic solid waste drying system, which is optimized using the above-mentioned optimization method. The high-water content organic solid waste drying system also includes a controller and a first sensor assembly and a second sensor assembly disposed in the sun shed. The controller is electrically connected to the fan, the first sensor assembly, and the second sensor assembly, respectively.

[0020] The first sensor assembly is used to obtain real-time parameters of the high-water content organic solid waste, including density, specific heat, thermal conductivity, viscosity and laying thickness of the high-water content organic solid waste;

[0021] The second sensor assembly is used to obtain real-time parameters in the sun shed, and the real-time parameters in the sun shed include sunlight radiation intensity, wind speed, temperature and humidity in the sun shed;

[0022] The controller is used to control the operating speed of the fan and the turning frequency of the target mixture based on the real-time parameters of the high-water content organic solid waste and the sun shed.

[0023] It can be seen from the above scheme that the optimization method, device and system of the high-water-content organic solid waste drying system provided by the present invention optimize the temperature field, humidity field and flow field by adjusting the location and number of the drying equipment in the sun shed, thereby improving the drying efficiency of the high-water-content organic solid waste by strengthening the water mass transfer process. At the same time, by modeling the physicochemical changes, heat transfer and moisture migration of the high-water-content organic solid waste (i.e., flow model, component model and heat transfer model), the physical mechanism of the drying process can be better understood, thereby optimizing the design of the sun shed. Therefore, the above technical solution can improve the drying efficiency and optimize the location and number of the drying equipment in the high-water-content organic solid waste drying system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a flow chart of an optimization method for a high-water content organic solid waste drying system provided by an embodiment of the present invention;

[0026] Figure 2 This is a hardware architecture diagram of an electronic device provided by an embodiment of the present invention;

[0027] Figure 3 This is a structural diagram of an optimization device for a high-water content organic solid waste drying system provided by an embodiment of the present invention;

[0028] Figure 4 A schematic structural diagram of a drying system for high-water content organic solid waste provided by an embodiment of the present invention;

[0029] Figure 5A schematic diagram illustrating the shrinkage and agglomeration of solid waste agglomerates and how to prevent shrinkage and agglomeration, according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the thermal conductivity calculation principle provided by an embodiment of the present invention.

[0031] Reference numerals:

[0032] 1-Sunroom; 2-Fan; 3-Gas inlet; 4-Gas outlet; 5-Target mixture; 6-Controller. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] See also Figure 1 and Figure 4 One embodiment of the present invention provides an optimization method for a high-water-content organic solid waste drying system. The high-water-content organic solid waste drying system includes a sun shed 1, a target mixture 5 laid in the sun shed 1, and a drying device arranged in the sun shed 1. The target mixture 5 includes high-water-content organic solid waste to be dried, target organic matter, and target bacterial species. The target organic matter is used to provide a carbon source for the target bacterial species. The target bacterial species is used to degrade organic matter in the high-water-content organic solid waste and increase the porosity and specific surface area of ​​the high-water-content organic solid waste.

[0035] The optimization method includes:

[0036] Step 100: Mesh the sun shed 1 in Fluent software;

[0037] Step 102: Select a target mathematical model in Fluent software; wherein the target mathematical model includes a flow model, a component model, and a heat transfer model;

[0038] Step 104: Determine boundary conditions in Fluent software and assign values ​​to the boundary conditions; wherein the boundary conditions include the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste, as well as the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed 1;

[0039] Step 106: numerically simulate the drying process of the high-water content organic solid waste to obtain the flow field, humidity field, and temperature field in the sun shed 1;

[0040] Step 108, based on the flow field, humidity field, temperature field in the sunlight shed 1, the position and number of drying equipment in the high-moisture organic solid waste drying system are optimized.

[0041] In this embodiment, the optimization of the temperature field, humidity field and flow field is realized by adjusting the setting position and number of drying equipment in the sunlight shed 1, so as to improve the drying efficiency of high-moisture organic solid waste by strengthening the water mass transfer process. At the same time, by modeling the physical and chemical changes, heat transfer and water migration of high-moisture organic solid waste (i.e. flow model, component model and heat transfer model), the physical mechanism in the drying process can be better understood, so as to optimize the design of the sunlight shed 1. Therefore, the above technical scheme can improve the drying efficiency and optimize the position and number of drying equipment in the high-moisture organic solid waste drying system.

[0042] In an embodiment of the present application, the drying equipment includes a fan 2 and a dryer (not shown in the figure), one end of the sunlight shed 1 is provided with a gas inlet 3, and the other end is provided with a gas outlet 4, the fan 2 is used to drive the water vaporized by the target mixture 5 to be discharged from the gas outlet 4, and the dryer is used to dry the high-moisture organic solid waste.

[0043] In this embodiment, by setting multiple fans 2 and dryers in the sunlight shed 1, the drying efficiency of high-moisture organic solid waste can be further improved.

[0044] In an embodiment of the present application, the step of "optimizing the position and number of drying equipment in the high-moisture organic solid waste drying system based on the flow field, humidity field and temperature field in the sunlight shed 1" can specifically include:

[0045] Based on the flow field, humidity field and temperature field in the sunlight shed 1, the first setting position of the fan 2 in the sunlight shed 1 is determined; wherein one fan 2 is arranged at each first setting position;

[0046] Based on the humidity field and temperature field in the sunlight shed 1, the second setting position of the dryer in the sunlight shed 1 is determined; wherein one dryer is arranged at each second setting position.

[0047] In this embodiment, the optimization of the temperature field, humidity field and flow field is realized by adjusting the first setting position of the fan 2 in the sunlight shed 1, so as to improve the drying efficiency of high-moisture organic solid waste by strengthening the water mass transfer process. At the same time, by modeling the physical and chemical changes, heat transfer and water migration of high-moisture organic solid waste (i.e. flow model, component model and heat transfer model), the physical mechanism in the drying process can be better understood, so as to optimize the design of the sunlight shed 1 and improve the drying efficiency.

[0048] It can be understood that, based on the flow field in the sunlight shed 1, it can be seen which area is a stagnant area, so a fan 2 can be arranged in the stagnant area to drive the airflow movement in the stagnant area; based on the humidity field in the sunlight shed 1, it can be seen which area is a dry dead angle, so a fan 2 can be arranged in the dry dead angle to drive the airflow to the dry dead angle; based on the temperature field in the sunlight shed 1, the temperature distribution can be seen, so a fan 2 can be arranged in the area with higher temperature to drive the airflow to the area with lower temperature. In this way, the optimal position of the fan 2 in the sunlight shed 1 can be achieved.

[0049] In the embodiment, the optimization of the temperature field and the humidity field is achieved by adjusting the second setting position of the dryer in the sunlight shed 1, so that the drying efficiency of the high-moisture organic solid waste is improved by strengthening the water mass transfer process. At the same time, by modeling the physical and chemical changes, heat transfer and water migration of the high-moisture organic solid waste (i.e. component model and heat transfer model), the physical mechanism in the drying process can be better understood, so that the design of the sunlight shed 1 can be optimized and the drying efficiency can be improved.

[0050] It can be understood that, based on the humidity field in the sunlight shed 1, it can be seen which area is a dry dead angle, so a dryer can be arranged in the dry dead angle to dry the moisture in the dry dead angle; based on the temperature field in the sunlight shed 1, the temperature distribution can be seen, so a dryer can be arranged in the area with lower temperature to transfer the temperature to the area with lower temperature. In this way, the optimal second setting position of the dryer in the sunlight shed 1 can be achieved.

[0051] As shown in Figure 6 In one embodiment of the present application, the thermal conductivity of the high-moisture organic solid waste is determined by the following method:

[0052] The cylindrical barrel is divided into upper and lower spaces, and the high-moisture organic solid waste is filled in the lower space of the cylindrical barrel, and the upper space of the cylindrical barrel is an air space;

[0053] A heating rod is inserted at the center position of the cylindrical barrel to heat the high-moisture organic solid waste and air by the heating rod; wherein the heating rod is arranged in the upper space and the lower space;

[0054] A first temperature sensor is inserted at a non-central position of the lower space, a second temperature sensor is inserted at a non-central position of the upper space, and a third temperature sensor is inserted at a central position of the high-moisture organic solid waste to monitor the temperature of the heating rod; wherein the distance from the first temperature sensor to the heating rod is equal to the distance from the second temperature sensor to the heating rod;

[0055] The thermal conductivity of the high-moisture organic solid waste is determined by the following formula:

[0056]

[0057] In the formula, λs is the thermal conductivity, ha is the height of the upper space, hs is the height of the lower space, t1 is the temperature detected by the first temperature sensor, t2 is the temperature detected by the second temperature sensor, and t3 is the temperature detected by the third temperature sensor.

[0058] It should be noted that the above formula assumes that heat is only conducted from the cylindrical curved surface, and the temperature only changes with the radius r, which is a one-dimensional stable temperature field conduction. According to the stable conduction Fourier law, the heat conduction rate (heat conducted per unit time) of a certain microelement is proportional to the normal temperature gradient of the isothermal surface of the microelement and the heat conduction area of the microelement.

[0059] As shown in Figure 2 , Figure 3 The embodiment of the present application provides an optimization device of a high-moisture organic solid waste drying system. The device embodiment can be realized by software, or realized by hardware or a combination of software and hardware. From the hardware layer, as shown in Figure 2 , it is a hardware architecture diagram of an electronic device where the optimization device of the high-moisture organic solid waste drying system provided by the embodiment of the present application is located. In addition to the processor, the memory, the network interface, and the non-volatile memory shown in Figure 2 , the electronic device where the device in the embodiment is usually also includes other hardware, such as a forwarding chip responsible for processing packets, etc. Taking the software implementation as an example, as shown in Figure 3 , as a logically meaningful device, it is formed by the CPU of the electronic device where it is located to read the corresponding computer program in the non-volatile memory into the memory and run.

[0060] As shown in Figure 3 , the optimization device of the high-moisture organic solid waste drying system provided by the embodiment includes a sunlight shed 1, a target mixture 5 laid in the sunlight shed 1, and a drying equipment arranged in the sunlight shed 1. The target mixture 5 includes high-moisture organic solid waste to be dried, target organic matter, and target strains. The target organic matter is used to provide carbon source for the target strains, and the target strains are used to degrade organic matter in the high-moisture organic solid waste and increase the porosity and specific surface area of the high-moisture organic solid waste.

[0061] The optimization device includes:

[0062] The dividing module 300 is used for grid division of the sunlight shed 1 in the Fluent software.

[0063] The selecting module 302 is used for selecting a target mathematical model in the Fluent software. The target mathematical model includes a flow model, a component model, and a heat transfer model.

[0064] The assignment module 304 is used to determine boundary conditions in the Fluent software and assign values ​​to the boundary conditions; wherein the boundary conditions include the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste, as well as the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed 1;

[0065] The simulation module 306 is used to perform numerical simulation on the drying process of high-water content organic solid waste to obtain the flow field, humidity field, and temperature field in the sun shed 1;

[0066] The optimization module 308 is used to optimize the position and quantity of drying equipment in the high-water content organic solid waste drying system based on the flow field, humidity field, and temperature field in the sun shed 1.

[0067] In an embodiment of the present invention, the partitioning module 300 can be used to execute step 100 in the above method embodiment, the selection module 302 can be used to execute step 102 in the above method embodiment, the assignment module 304 can be used to execute step 104 in the above method embodiment, the simulation module 306 can be used to execute step 106 in the above method embodiment, and the optimization module 308 can be used to execute step 108 in the above method embodiment.

[0068] In one embodiment of the present invention, the drying equipment includes a fan 2 and a dryer. A gas inlet 3 is provided at one end of the sun shed 1, and a gas outlet 4 is provided at the other end. The fan 2 is used to drive the evaporated water of the target mixture 5 to be discharged from the gas outlet 4, and the dryer is used to dry high-water content organic solid waste.

[0069] In one embodiment of the present invention, the optimization module 308 is configured to perform the following operations:

[0070] Determine the first setting position of the fan 2 in the sun shed 1 based on the flow field, humidity field and temperature field in the sun shed 1; wherein one fan 2 is set at each first setting position;

[0071] Based on the humidity field and the temperature field in the sun shed 1 , the second setting position of the dryer in the sun shed 1 is determined; wherein, a dryer is set at each second setting position.

[0072] In one embodiment of the present invention, the thermal conductivity of high-water content organic solid waste is determined as follows:

[0073] The cylindrical cylinder is divided into two spaces, the upper and lower spaces, and the high-water content organic solid waste is filled in the lower space of the cylindrical cylinder, and the upper space of the cylindrical cylinder is an air space;

[0074] A heating rod is inserted into the center of the cylindrical barrel to heat the high-water content organic solid waste and air using the heating rod; wherein the heating rod is arranged in the upper space and the lower space;

[0075] Insert a first temperature sensor into a non-center portion of the lower space, insert a second temperature sensor into a non-center portion of the upper space, and insert a third temperature sensor into the center of the high-water-content organic solid waste to monitor the temperature of the heating rod; wherein the distance from the first temperature sensor to the heating rod is equal to the distance from the second temperature sensor to the heating rod;

[0076] The thermal conductivity of high-water content organic solid waste is determined by the following formula:

[0077]

[0078] Wherein, λs is the thermal conductivity, ha is the height of the upper space, hs is the height of the lower space, t1 is the temperature detected by the first temperature sensor, t2 is the temperature detected by the second temperature sensor, and t3 is the temperature detected by the third temperature sensor.

[0079] It should be understood that the structure illustrated in the embodiments of the present invention does not constitute a specific limitation on the optimization device for a high-water content organic solid waste drying system. In other embodiments of the present invention, the optimization device for a high-water content organic solid waste drying system may include more or fewer components than illustrated, or may combine or separate certain components, or employ a different component arrangement. The illustrated components may be implemented in hardware, software, or a combination of both.

[0080] The information interaction, execution process, etc. between the modules in the above-mentioned device are based on the same concept as the embodiment of the method of the present invention. For specific contents, please refer to the description in the embodiment of the method of the present invention and will not be repeated here.

[0081] An embodiment of the present invention further provides an electronic device including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, an optimization method for a high-water content organic solid waste drying system in any embodiment of the present invention is implemented.

[0082] An embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the processor executes an optimization method for a high-water content organic solid waste drying system according to any embodiment of the present invention.

[0083] Specifically, a system or device equipped with a storage medium can be provided, on which software program codes that implement the functions of any of the above-mentioned embodiments are stored, and a computer (or CPU or MPU) of the system or device can be enabled to read and execute the program codes stored in the storage medium.

[0084] In this case, the program code itself read from the storage medium can realize the function of any one of the above-mentioned embodiments, and thus the program code and the storage medium storing the program code constitute part of the present invention.

[0085] Examples of storage media for providing program code include floppy disks, hard disks, magneto-optical disks, optical disks (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), magnetic tapes, non-volatile memory cards, and ROMs. Alternatively, the program code can be downloaded from a server computer via a communication network.

[0086] In addition, it should be clear that the functions of any of the above embodiments can be achieved not only by executing the program code read by the computer, but also by enabling the operating system operating on the computer to complete part or all of the actual operations based on the instructions of the program code.

[0087] In addition, it can be understood that the program code read from the storage medium is written into a memory provided in an expansion board inserted into the computer or into a memory provided in an expansion module connected to the computer, and then based on the instructions of the program code, a CPU installed on the expansion board or expansion module is enabled to perform part or all of the actual operations, thereby realizing the functions of any of the above embodiments.

[0088] like Figure 4 As shown, one embodiment of the present invention provides a high-water content organic solid waste drying system, which is optimized using the optimization method mentioned in any of the above embodiments. The high-water content organic solid waste drying system also includes a controller 6 and a first sensor assembly (not shown in the figure) and a second sensor assembly (not shown in the figure) disposed in the sun shed 1. The controller 6 is electrically connected to the fan 2, the first sensor assembly, and the second sensor assembly, respectively.

[0089] The first sensor assembly is used to obtain real-time parameters of the high-water content organic solid waste, including density, specific heat, thermal conductivity, viscosity and laying thickness of the high-water content organic solid waste;

[0090] The second sensor assembly is used to obtain real-time parameters in the sun shed 1, including sunlight radiation intensity, wind speed, temperature and humidity in the sun shed 1;

[0091] The controller 6 is used to control the operating speed of the fan 2 and the turning frequency of the target mixture 5 based on the real-time parameters of the high-water content organic solid waste and the sun shed 1.

[0092] In this embodiment, since the real-time parameters of high-water-content organic solid waste and the sun shed 1 are constantly changing during the actual engineering application process, in order to continuously maintain stable and efficient drying efficiency, it is possible to consider effectively monitoring and dynamically adjusting the entire drying process, that is, with the help of the controller 6, the first sensor component and the second sensor component, the operating speed of the fan 2 and the turning frequency of the rake can be controlled to better achieve efficient drying.

[0093] It can be understood that the first sensor component includes, for example, a dynamic torque sensor (for measuring viscosity), a density sensor, a heat flow sensor (for measuring specific heat), a temperature sensor (for measuring thermal conductivity, see above), etc., and the second sensor component includes, for example, a temperature sensor, a humidity sensor, a wind speed sensor, a radiation sensor, etc.

[0094] In one embodiment of the present invention, continuous turning of the compost is achieved using a rake (not shown in the figure). Continuous turning by the rake ensures uniform contact between the materials in the target mixture 5. The target organic matter also serves to support moisture diffusion channels between solid waste clumps formed by high-water-content organic solid waste, thereby allowing unbound water surrounded by the multiple solid waste clumps to diffuse outward from the moisture diffusion channels.

[0095] By allowing the target mixture 5 to receive sunlight radiation, continuously turning the pile and utilizing the fan 2 to drive, the high-water content organic solid waste is dried so that the moisture content of the high-water content organic solid waste is less than 40%; wherein, the temperature in the sun shed 1 and the temperature of the target mixture 5 during the drying process do not exceed 50°C.

[0096] In this embodiment, the target organic matter can not only provide a carbon source for the target bacteria, but also support the water diffusion channel between the solid waste clumps formed by the high water content organic solid waste (see Figure 5When the target organic matter is not added and the pile is not turned continuously, the pores collapse and shrink and form agglomerates; when the target organic matter is added and the pile is turned continuously, no pore collapse and shrinkage and agglomeration occur), so that the unbound water surrounded by multiple solid waste clumps diffuses outward from the water diffusion channel; with the help of the target bacteria, the organic matter in the high-water-content organic solid waste can be degraded and the porosity and specific surface area of ​​the high-water-content organic solid waste can be increased to improve the microscopic morphology of the solid waste and improve the permeability and permeability of the solid waste; and the temperature in the sun shed 1 and the temperature of the target mixture 5 during the drying process do not exceed 50°C, which can not only ensure good living conditions for the target bacteria, but also reduce the risk of dust explosion caused by the increase in dust concentration in the later stage of drying due to the introduction of the target organic matter; in this way, by allowing the target mixture 5 to receive sunlight radiation, continuously turning the pile and using the fan 2 to drive, the high-water-content organic solid waste is dried, so that the moisture content of the high-water-content organic solid waste is less than 40%. Therefore, the above technical solution effectively solves the problem of low drying efficiency caused by shrinkage, agglomeration and pore structure closure of high-water-content organic solid waste during the drying process.

[0097] It should be noted that the continuous turning operation in the embodiment of the present invention can better ensure the uniformity of the various substances in the target mixture 5, so that the target organic matter can better support the moisture diffusion channels between the solid waste clumps formed by the high-water content organic solid waste. On the contrary, the fermentation heat production activity of the target strain in the embodiment of the present invention is relatively large compared to the method of forming a large number of moisture diffusion channels by continuous turning, and the former has a negligible effect on drying. Moreover, the continuous turning operation can also adjust parameters such as the moisture content, pH value, C / N ratio in the target mixture 5 to optimize the growth environment of the target strain.

[0098] In one embodiment of the present invention, the controller 6 specifically controls the operating speed of the fan 2 and the turning frequency of the compost turning machine in the following manner:

[0099] Constructing a training sample set; wherein the training sample set includes the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste as input training samples, the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed 1, and the solid waste characteristic index as output training samples, the solid waste characteristic index being used to characterize the material properties of the high-water content organic solid waste;

[0100] Input the constructed training sample set into the preset neural network model to train the neural network model and obtain a dynamic adjustment model;

[0101] The real-time parameters of high-water content organic solid waste and sun shed 1 are input into the dynamic adjustment model to obtain the solid waste characteristic index at the current moment;

[0102] Based on the solid waste characteristic index at the current moment, the operating speed of the fan 2 and the turning frequency of the pile turning machine are controlled.

[0103] In this embodiment, end-to-end training and learning can be quickly achieved through machine learning. This does not require considering the correlation between the various intermediate parameters, but only requires updating the weights of the neural network model based on a large amount of known data to obtain more accurate output results. Therefore, this method can quickly establish a mapping relationship between input (i.e., parameters of high-water-content organic solid waste and sun shed 1) and output (i.e., solid waste characteristic index).

[0104] In one embodiment of the present invention, the controller 6 performs the following operations when controlling the operating speed of the fan 2 and the turning frequency of the pile turning machine based on the solid waste characteristic index at the current moment:

[0105] If SI=0, fan 2 and the rake are controlled to start;

[0106] If 0<SI≤25, the speed of fan 2 is controlled to be 100% and the turning frequency of the tiller is controlled to be 30 times / hour;

[0107] If 25<SI≤75, the speed of fan 2 is controlled to 80% and the turning frequency of the compost turning machine is controlled to 20 times / hour;

[0108] If 75<SI≤125, the speed of fan 2 is controlled to 60% and the turning frequency of the tiller is controlled to 15 times / hour;

[0109] If 125<SI≤175, the speed of fan 2 is controlled to 40% and the turning frequency of the tiller is controlled to 10 times / hour;

[0110] If 175<SI≤225, the speed of fan 2 is controlled to 20% and the turning frequency of the compost turning machine is controlled to 5 times / hour;

[0111] If 225<SI, fan 2 and the rake are controlled to stop running;

[0112] Among them, SI is the solid waste characteristic index at the current moment.

[0113] In this embodiment, by setting a solid waste characteristic index (SI) as a judgment indicator of the controller 6, compared with multiple input parameters (such as high-water content organic solid waste and multiple parameters of the sun shed 1), the former can more quickly realize the control of the operating speed of the fan 2 and the turning frequency of the pile turning machine.

[0114] In some embodiments, the moisture content of the high-water content organic solid waste is greater than 80%, which is not specifically limited in this embodiment of the present invention.

[0115] In some embodiments, the target organic matter includes at least one of straw and leaf.

[0116] In some embodiments, the target bacteria include at least one of photosynthetic bacteria, yeast, lactic acid bacteria, pseudomonas, bacillus and actinomycetes.

[0117] In some embodiments, the mass ratio of the target organic matter to the dry basis of the high-moisture organic solid waste is 8-12%, which is not limited in the embodiments of the present application.

[0118] In some embodiments, the mass ratio of the target bacteria to the dry basis of the high-moisture organic solid waste is 2-5%, which is not limited in the embodiments of the present application.

[0119] It should be noted that the relational terms herein such as first and second are used only to differentiate one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or device.

[0120] Those skilled in the art can understand that all or part of the steps of the above-mentioned method embodiments can be completed by program instruction-related hardware, and the aforementioned program can be stored in a computer-readable storage medium, which, when executed, performs steps including the above-mentioned method embodiments; and the aforementioned storage medium includes ROM, RAM, magnetic disc or optical disc and various program code storage media.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for optimizing a high-water content organic solid waste drying system, characterized in that: The high-water-content organic solid waste drying system includes a sun shed, a target mixture laid in the sun shed, and a drying device arranged in the sun shed. The target mixture includes the high-water-content organic solid waste to be dried, target organic matter, and target bacterial species. The target organic matter is used to provide a carbon source for the target bacterial species. The target bacterial species is used to degrade organic matter in the high-water-content organic solid waste and increase the porosity and specific surface area of ​​the high-water-content organic solid waste. The optimization method comprises: Meshing the sun shed in Fluent software; Selecting a target mathematical model in the Fluent software; wherein the target mathematical model includes a flow model, a component model, and a heat transfer model; Determining boundary conditions in the Fluent software and assigning values ​​to the boundary conditions; wherein the boundary conditions include the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste, and the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed; Numerical simulation is performed on the drying process of the high-water content organic solid waste to obtain the flow field, humidity field, and temperature field in the sun shed; Based on the flow field, humidity field and temperature field in the sun shed, the position and quantity of drying equipment in the high-water content organic solid waste drying system are optimized.

2. The optimization method according to claim 1, characterized in that The drying equipment includes a fan and a dryer. A gas inlet is provided at one end of the sun shed, and a gas outlet is provided at the other end. The fan is used to drive the evaporated water of the target mixture to be discharged from the gas outlet, and the dryer is used to dry the high-water content organic solid waste.

3. The optimization method according to claim 2, characterized in that The optimization of the position and quantity of drying equipment in the high-water content organic solid waste drying system based on the flow field, humidity field, and temperature field in the sun shed includes: Determining first setting positions of the fans in the sun shed based on the flow field, humidity field, and temperature field in the sun shed; wherein one fan is set at each of the first setting positions; Based on the humidity field and the temperature field in the sun shed, the second setting position of the dryer in the sun shed is determined; wherein, one dryer is set at each second setting position.

4. The optimization method according to any one of claims 2 to 3, characterized in that: The thermal conductivity of the high-water content organic solid waste is determined as follows: The cylindrical barrel is divided into two spaces, the upper and lower spaces, and the high-water content organic solid waste is filled in the lower space of the cylindrical barrel, and the upper space of the cylindrical barrel is an air space; A heating rod is inserted into the center of the cylindrical barrel to heat the high-water content organic solid waste and air using the heating rod; wherein the heating rod is arranged in the upper space and the lower space; Inserting a first temperature sensor at a non-center position of the lower space, inserting a second temperature sensor at a non-center position of the upper space, and inserting a third temperature sensor at the center of the high-water-content organic solid waste to monitor the temperature of the heating rod; wherein the distance from the first temperature sensor to the heating rod is equal to the distance from the second temperature sensor to the heating rod; The thermal conductivity of the high-water content organic solid waste is determined by the following formula: Wherein, λs is the thermal conductivity, ha is the height of the upper space, hs is the height of the lower space, t1 is the temperature detected by the first temperature sensor, t2 is the temperature detected by the second temperature sensor, and t3 is the temperature detected by the third temperature sensor.

5. An optimization device for a high-water content organic solid waste drying system, characterized in that: The high-water-content organic solid waste drying system includes a sun shed, a target mixture laid in the sun shed, and a drying device arranged in the sun shed. The target mixture includes the high-water-content organic solid waste to be dried, target organic matter, and target bacterial species. The target organic matter is used to provide a carbon source for the target bacterial species. The target bacterial species is used to degrade organic matter in the high-water-content organic solid waste and increase the porosity and specific surface area of ​​the high-water-content organic solid waste. The optimization device comprises: A partitioning module, used for performing grid partitioning on the sun shed in Fluent software; A selection module, configured to select a target mathematical model in the Fluent software; wherein the target mathematical model includes a flow model, a component model, and a heat transfer model; An assignment module, configured to determine boundary conditions in the Fluent software and assign values ​​to the boundary conditions; wherein the boundary conditions include the density, specific heat, thermal conductivity, viscosity, and laying thickness of the high-water content organic solid waste, and the sunlight radiation intensity, wind speed, temperature, and humidity in the sun shed; A simulation module is used to perform numerical simulation on the drying process of the high-water content organic solid waste to obtain the flow field, humidity field, and temperature field in the sun shed; The optimization module is used to optimize the position and quantity of drying equipment in the high-water content organic solid waste drying system based on the flow field, humidity field and temperature field in the sun shed.

6. The optimization device according to claim 5, characterized in that The drying equipment includes a fan and a dryer. A gas inlet is provided at one end of the sun shed, and a gas outlet is provided at the other end. The fan is used to drive the evaporated water of the target mixture to be discharged from the gas outlet, and the dryer is used to dry the high-water content organic solid waste.

7. The optimization device according to claim 6, characterized in that The optimization module is used to perform the following operations: Determining first setting positions of the fans in the sun shed based on the flow field, humidity field, and temperature field in the sun shed; wherein one fan is set at each of the first setting positions; Based on the humidity field and the temperature field in the sun shed, the second setting position of the dryer in the sun shed is determined; wherein, one dryer is set at each second setting position.

8. The optimization device according to any one of claims 6-7, characterized in that: The thermal conductivity of the high-water content organic solid waste is determined as follows: The cylindrical barrel is divided into two spaces, the upper and lower spaces, and the high-water content organic solid waste is filled in the lower space of the cylindrical barrel, and the upper space of the cylindrical barrel is an air space; A heating rod is inserted into the center of the cylindrical barrel to heat the high-water content organic solid waste and air using the heating rod; wherein the heating rod is arranged in the upper space and the lower space; Inserting a first temperature sensor at a non-center position of the lower space, inserting a second temperature sensor at a non-center position of the upper space, and inserting a third temperature sensor at the center of the high-water-content organic solid waste to monitor the temperature of the heating rod; wherein the distance from the first temperature sensor to the heating rod is equal to the distance from the second temperature sensor to the heating rod; The thermal conductivity of the high-water content organic solid waste is determined by the following formula: Wherein, λs is the thermal conductivity, ha is the height of the upper space, hs is the height of the lower space, t1 is the temperature detected by the first temperature sensor, t2 is the temperature detected by the second temperature sensor, and t3 is the temperature detected by the third temperature sensor.

9. A high-water content organic solid waste drying system, characterized in that: The optimization method according to any one of claims 2 to 4 is used for optimization, wherein the high-water content organic solid waste drying system further comprises a controller and a first sensor assembly and a second sensor assembly disposed in the sun shed, wherein the controller is electrically connected to the fan, the first sensor assembly, and the second sensor assembly, respectively; The first sensor assembly is used to obtain real-time parameters of the high-water content organic solid waste, wherein the real-time parameters of the high-water content organic solid waste include density, specific heat, thermal conductivity, viscosity and laying thickness of the high-water content organic solid waste; The second sensor assembly is used to obtain real-time parameters in the sun shed, and the real-time parameters in the sun shed include sunlight radiation intensity, wind speed, temperature and humidity in the sun shed; The controller is used to control the operating speed of the fan and the turning frequency of the target mixture based on the real-time parameters of the high-water content organic solid waste and the sun shed.

10. The high-water content organic solid waste drying system according to claim 9, characterized in that: The continuous turning of the pile is achieved by using a turning rake, which allows the materials in the target mixture to be evenly contacted through continuous turning of the pile by the turning rake; wherein the target organic matter is also used to support the water diffusion channels between the solid waste clumps formed by the high-water content organic solid waste, so that the unbound water surrounded by the multiple solid waste clumps can diffuse outward from the water diffusion channels; The high-water-content organic solid waste is dried by allowing the target mixture to receive sunlight radiation, continuously turning the pile, and utilizing the fan to drive it, so that the moisture content of the high-water-content organic solid waste is less than 40%; wherein, the temperature in the sun shed and the temperature of the target mixture during the drying process do not exceed 50°C.

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