Method, device and system for optimizing high-water-content organic solid waste drying system

Abstract

The invention relates to the technical field of high-water-content organic solid waste drying, in particular to an optimization method, device and system for a high-water-content organic solid waste drying system. According to the technical scheme, optimization of a temperature field, a humidity field and a flow field is achieved by adjusting the arrangement position and the number of the drying devices in the sunlight shed, and therefore the drying efficiency of the high-water-content organic solid waste is improved by strengthening the water mass transfer process. Meanwhile, modeling (namely a flow model, a component model and a heat transfer model) is carried out on physical and chemical changes, heat transfer, water migration and the like of the high-water-content organic solid waste, so that the physical mechanism in the drying process can be better known, and the design of the sunlight shed is optimized. Therefore, according to the technical scheme, the drying efficiency can be improved, and the positions and the number of the drying devices in the high-water-content organic solid waste drying system can be optimized.

Description

Technical Field

[0001] The present invention relates to the technical field of measuring high-water-content organic solid waste, 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 refers to organic solid waste with high water content generated in the production and living process, including municipal waste, printing and dyeing waste, river waste, livestock manure, wine lees, oil sludge, kitchen waste, etc. High-water content organic solid waste has the following characteristics: 1) It is highly polluting, easy to rot and deteriorate, breed mosquitoes and pathogens, and pose a great threat to environmental protection and public health; 2) There is a large gap, with annual production usually measured in tens of millions or even billions of tons. The existing disposal capacity is seriously insufficient, the disposal technology is backward, and some areas still mainly use landfill.

[0003] In the related art, no technical solution has been found yet on how to optimize 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 an optimization method, device and system for 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 arranged 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 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;

[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 organic solid waste with high water content 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 comprises a sun shed, a target mixture laid in the sun shed, and a drying device arranged in the sun shed, wherein the target mixture comprises 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 to 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, used for 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;

[0016] An assignment module, 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 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 by the above-mentioned optimization method. The high-water content organic solid waste drying system also includes a controller and a first sensor component and a second sensor component arranged in the sun shed, and the controller is electrically connected to the fan, the first sensor component and the second sensor component respectively;

[0020] The first sensor assembly is used to obtain real-time parameters of the high-water content organic solid waste, and 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;

[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 frequency of continuously turning 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 optimizes the temperature field, humidity field and flow field by adjusting the setting position and number of drying equipment in the sun shed, thereby improving the drying efficiency of 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 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 scheme can improve the drying efficiency and optimize the position and number of 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 drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0025] Figure 1 It 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 is a hardware architecture diagram of an electronic device provided by an embodiment of the present invention;

[0027] Figure 3 It 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 diagram of the structure of a drying system for high-water-content organic solid waste provided by an embodiment of the present invention;

[0029] Figure 5A schematic diagram of the shrinkage and agglomeration of solid waste agglomerates and how to avoid shrinkage and agglomeration provided in an embodiment of the present invention;

[0030] Figure 6 A schematic diagram of thermal conductivity calculation provided in 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 part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in 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 An embodiment of the present invention provides an optimization method for a high-water content organic solid waste drying system, wherein the high-water content organic solid waste drying system comprises a sun shed 1, a target mixture 5 laid in the sun shed 1, and a drying device arranged in the sun shed 1, wherein the target mixture 5 comprises 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;

[0035] The optimization method includes:

[0036] Step 100, meshing 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, determining boundary conditions in Fluent software and assigning values ​​to the boundary conditions; wherein the boundary conditions include density, specific heat, thermal conductivity, viscosity and laying thickness of high-water-content organic solid waste and sunlight radiation intensity, wind speed, temperature and humidity in the sun shed 1;

[0039] Step 106, numerically simulate 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;

[0040] Step 108: Based on the flow field, humidity field, and temperature field in the sun shed 1, the position and quantity of drying equipment in the high-water content organic solid waste drying system are optimized.

[0041] In this embodiment, the temperature field, humidity field and flow field are optimized by adjusting the location and quantity of the drying equipment in the sun shed 1, so that the drying efficiency of high-water organic solid waste is improved by strengthening the water mass transfer process. At the same time, by modeling the physicochemical changes, heat transfer and water migration of high-water organic solid waste (i.e., flow model, component model and heat transfer model), the physical mechanism in the drying process can be better understood, thereby optimizing the design of the sun shed 1. Therefore, the above technical solution can improve the drying efficiency and optimize the location and quantity of the drying equipment in the high-water organic solid waste drying system.

[0042] In one embodiment of the present invention, the drying equipment includes a fan 2 and a dryer (not shown in the figure). 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.

[0043] In this embodiment, by arranging a plurality of fans 2 and dryers in the sun shed 1, the drying efficiency of organic solid waste with high water content can be further improved.

[0044] In one embodiment of the present invention, the step of "optimizing 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" may specifically include:

[0045] Based on the flow field, humidity field and temperature field in the sun shed 1, determine the first setting position of the fan 2 in the sun shed 1; wherein a fan 2 is set at each first setting position;

[0046] 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.

[0047] In this embodiment, the temperature field, humidity field and flow field are optimized by adjusting the first setting position of the fan 2 in the sun shed 1, so that the drying efficiency of high-water organic solid waste is improved by strengthening the water mass transfer process. At the same time, by modeling the physicochemical changes, heat transfer and water migration of high-water 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 1 and improving the drying efficiency.

[0048] It can be understood that based on the flow field in the sun shed 1, it can be seen which areas are stagnant areas, so a fan 2 can be set in the stagnant areas to drive the airflow movement in the stagnant areas; based on the humidity field in the sun shed 1, it can be seen which areas are drying dead corners, so a fan 2 can be set in the drying dead corners to drive the airflow to the drying dead corners; based on the temperature field in the sun shed 1, the temperature distribution can be seen, so a fan 2 can be set in the area with higher temperature to drive the airflow to the area with lower temperature. In this way, the setting position of the fan 2 in the sun shed 1 can be optimized.

[0049] In this embodiment, the temperature field and humidity field are optimized by adjusting the second setting position of the dryer in the sun shed 1, so that the drying efficiency of high-water organic solid waste is improved by strengthening the water mass transfer process. At the same time, by modeling the physicochemical changes, heat transfer and water migration of high-water organic solid waste (i.e., 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 1 and improving the drying efficiency.

[0050] It is understandable that based on the humidity field in the sun shed 1, it is possible to see which areas are drying dead corners, so that a dryer can be set in the drying dead corners to dry the moisture in the drying dead corners; based on the temperature field in the sun shed 1, the temperature distribution can be seen, so that a dryer can be set in a low temperature area to transfer the temperature to the low temperature area. In this way, the second setting position of the dryer in the sun shed 1 can be optimized.

[0051] like Figure 6 As shown, in one embodiment of the present invention, the thermal conductivity of high water content organic solid waste is determined by the following method:

[0052] The cylindrical cylinder is divided into two spaces, the upper and lower spaces, and the lower space of the cylindrical cylinder is filled with high-water content organic solid waste, and the upper space of the cylindrical cylinder is an air space;

[0053] A heating rod is inserted into the center of the cylindrical tube to heat the organic solid waste with high water content and the air by using the heating rod; wherein the heating rod is arranged in the upper space and the lower space;

[0054] Inserting a first temperature sensor into a non-center of the lower space, inserting a second temperature sensor into a non-center of the upper space, and inserting 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;

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

[0056]

[0057] 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.

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

[0059] like Figure 2 , Figure 3 As shown, the embodiment of the present invention provides an optimization device for a high-water content organic solid waste drying system. The device embodiment can be implemented by software, or by hardware or a combination of software and hardware. From the hardware level, Figure 2 As shown, it is a hardware architecture diagram of an electronic device where an optimization device of a high-water content organic solid waste drying system provided by an embodiment of the present invention is located. Figure 2 In addition to the processor, memory, network interface, and non-volatile memory shown, the electronic device in the embodiment may also include other hardware, such as a forwarding chip responsible for processing messages, etc. Taking software implementation as an example, Figure 3 As shown, as a device in a logical sense, the CPU of the electronic device in which it is located reads the corresponding computer program in the non-volatile memory into the internal memory and runs it.

[0060] like Figure 3 As shown, the present embodiment provides an optimization device for a high-water content organic solid waste drying system, the high-water content organic solid waste drying system comprising 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 comprising 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 to 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;

[0061] The optimization device comprises:

[0062] A division module 300 is used to perform grid division on the sun shed 1 in the Fluent software;

[0063] A selection module 302 is used 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;

[0064] The assignment module 304 is used to determine the 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 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 used to perform the following operations:

[0070] Based on the flow field, humidity field and temperature field in the sun shed 1, determine the first setting position of the fan 2 in the sun shed 1; wherein a 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 by:

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

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

[0075] Inserting a first temperature sensor into a non-center of the lower space, inserting a second temperature sensor into a non-center of the upper space, and inserting 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 is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on an optimization device for a high-water content organic solid waste drying system. In other embodiments of the present invention, an optimization device for a high-water content organic solid waste drying system may include more or fewer components than shown in the figure, or combine certain components, or split certain components, or arrange the components differently. The components shown in the figure may be implemented in hardware, software, or a combination of software and hardware.

[0080] The information interaction, execution process and other contents 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 the specific contents, please refer to the description in the embodiment of the method of the present invention, and no further description is given 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 in any embodiment of the present invention.

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

[0085] The storage medium embodiments for providing the program code include a floppy disk, a hard disk, a magneto-optical disk, an optical disk (such as CD-ROM, CD-R, CD-RW, DVD-ROM, DVD-RAM, DVD-RW, DVD+RW), a magnetic tape, a non-volatile memory card, and a ROM. Alternatively, the program code can be downloaded from a server computer by a communication network.

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

[0087] In addition, it can be understood that the program code read from the storage medium is written to a memory provided in an expansion board inserted into the computer or to 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-mentioned embodiments.

[0088] like Figure 4 As shown, an embodiment of the present invention provides a high-water content organic solid waste drying system, which is optimized by 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 component (not shown in the figure) and a second sensor component (not shown in the figure) arranged in the sun shed 1. The controller 6 is electrically connected to the fan 2, the first sensor component and the second sensor component respectively;

[0089] The first sensor component is used to obtain real-time parameters of high-water content organic solid waste, and the real-time parameters of high-water content organic solid waste include 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, and the real-time parameters in the sun shed 1 include 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 frequency of continuously turning 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 a 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 assembly and the second sensor assembly, the operating speed of the fan 2 and the turning frequency of the pile turning machine 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 compost turning is achieved by using a compost turning machine (not shown in the figure), and the materials in the target mixture 5 are uniformly contacted by continuous compost turning by the compost turning machine; wherein the target organic matter is also used to support the water diffusion channel 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 diffuses outward from the water diffusion channel;

[0095] The high-water content organic solid waste is dried by allowing the target mixture 5 to receive sunlight radiation, continuously turning the pile and using the fan 2 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 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 5, when the target organic matter is not added and the compost is not turned continuously, the pores collapse and shrink and agglomerate; when the target organic matter is added and the compost 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; 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 by means of the target bacteria, so as 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 the better survival conditions of 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, the high-water content organic solid waste is dried by making the target mixture 5 receive sunlight radiation, continuously turning the compost and using the fan 2 to make the water content of the high-water content organic solid waste 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 compost turning operation in the embodiment of the present invention can better ensure the uniformity of each substance in the target mixture 5, so that the target organic matter can better support the water 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 way in which continuous compost turning forms a large number of water diffusion channels, and the former has a negligible effect on drying. Moreover, the continuous compost turning operation can also adjust the 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, and the solid waste characteristic index is used to characterize the material properties of the high-water content organic solid waste;

[0100] Inputting 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 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 compost turning machine are controlled.

[0103] In this embodiment, end-to-end training and learning can be quickly achieved through machine learning. There is no need to consider the correlation between the various intermediate parameters, but only needs to update the weights of the neural network model based on a large amount of known data to obtain a more accurate output result. 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 compost turning machine based on the solid waste characteristic index at the current moment:

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

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

[0107] If 25<SI≤75, the operating 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 be 60% and the frequency of turning the compost by the rake turner is controlled to be 15 times / hour;

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

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

[0111] If 225<SI, fan 2 and the rake machine 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 multiple parameters of high-water content organic solid waste and 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 compost 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 leaves.

[0116] In some embodiments, the target bacterial species 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 water content organic solid waste is 8-12%, which is not specifically limited in this embodiment of the present invention.

[0118] In some embodiments, the mass ratio of the target bacteria to the dry basis of the high-water-content organic solid waste is 2-5%, which is not specifically limited in this embodiment of the present invention.

[0119] It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" 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 includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0120] A person of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments can be completed by hardware related to program instructions, and the aforementioned program can be stored in a computer-readable storage medium. When the program is executed, it executes the steps of the above method embodiments; and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk, etc., various media that can store program codes.

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

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 comprises a sun shed, a target mixture laid in the sun shed, and a drying device arranged in the sun shed, wherein the target mixture comprises the 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; 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 organic solid waste with high water content 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: Based on the flow field, humidity field and temperature field in the sun shed, determining the first setting position of the fan 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 of the second setting positions.

4. The optimization method according to any one of claims 2-3, characterized in that: The thermal conductivity of the high water content organic solid waste is determined by the following method: The cylindrical cylinder is divided into two spaces, an upper space and an lower space, 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; A heating rod is inserted into the center of the cylindrical barrel to heat the high-water-content organic solid waste and air by using the heating rod; wherein the heating rod is arranged in the upper space and the lower space; Inserting a first temperature sensor into a non-center of the lower space, inserting a second temperature sensor into a non-center of the upper space, and inserting 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; 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 comprises a sun shed, a target mixture laid in the sun shed, and a drying device arranged in the sun shed, wherein the target mixture comprises the 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; The optimization device comprises: A partitioning module, used for performing grid partitioning on the sun shed in Fluent software; A selection module, used for 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; An assignment module, 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 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: Based on the flow field, humidity field and temperature field in the sun shed, determining the first setting position of the fan 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 of the second setting positions.

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 by the following method: The cylindrical cylinder is divided into two spaces, an upper space and an lower space, 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; A heating rod is inserted into the center of the cylindrical barrel to heat the high-water-content organic solid waste and air by using the heating rod; wherein the heating rod is arranged in the upper space and the lower space; Inserting a first temperature sensor into a non-center of the lower space, inserting a second temperature sensor into a non-center of the upper space, and inserting 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; 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 is performed by using the optimization method described in any one of claims 2 to 4, 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, and 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, and 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 frequency of continuously turning 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 compost turning is achieved by using a compost turning machine, and the continuous compost turning by the compost turning machine makes the materials in the target mixture contact evenly; wherein the target organic matter is also used to support the water diffusion channel 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 diffuses outward from the water diffusion channel; The high-water content organic solid waste is dried by allowing the target mixture to receive sunlight radiation, continuously turning the pile and using 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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