A solar-powered sludge drying system with sludge temporary storage facilities and its operation method

Abstract

This invention relates to the field of sludge drying technology, and discloses a solar-powered sludge drying system with a sludge temporary storage facility and its operation method. In this system, the storage capacity of the sludge temporary storage facility is designed based on local climatic conditions, primarily temperature, humidity, and solar radiation intensity. The operation method calculates the ideal sludge evaporation rate and sludge processing capacity for the day by obtaining the average ambient temperature, average ambient humidity, and average solar radiation intensity, and determines whether to store sludge in or remove it from the temporary storage facility for drying. This invention effectively solves the problem of uneven drying capacity distribution in solar-powered sludge drying technology during winter or rainy seasons, ensuring that sludge can be dried under suitable climatic conditions, thereby improving the efficiency and quality of sludge drying.

Description

Technical Field

[0001] This invention relates to the field of sludge drying technology, specifically to a solar-powered sludge drying system with sludge temporary storage facilities and its operation method. Background Technology

[0002] Solar-powered sludge drying uses solar energy as the primary energy source, combined with traditional greenhouse drying processes, to dry and stabilize sludge. This method offers advantages such as low energy consumption, low operating costs, simple operation, and stable performance. Solar-powered drying systems typically consist of a ground-mounted structure, a greenhouse, and a sludge turning machine; some are also equipped with fans to accelerate moisture evaporation.

[0003] In existing technologies, the daily sludge input or processing volume of sludge drying greenhouses fluctuates relatively little and is generally a fixed value. To maximize the utilization of solar energy and increase processing capacity, the designed processing capacity is usually based on the annual average daily processing volume. However, sludge solar drying technology uses solar energy as its energy source, and its processing capacity is closely related to weather conditions. Therefore, sludge processing capacity often fluctuates throughout the year, with low sludge processing capacity in winter and insufficient sludge drying standards, while high sludge processing capacity in summer results in insufficient sludge available for drying. Consequently, the utilization of solar energy is not maximized. Summary of the Invention

[0004] In view of this, the present invention provides a sludge solar drying system and operation method with sludge temporary storage facilities to solve the problem that the sludge treatment capacity of existing sludge solar drying technology fluctuates throughout the year, resulting in the failure to maximize the utilization of solar energy.

[0005] In a first aspect, the present invention provides an operation method for a sludge solar drying system with a sludge temporary storage facility, comprising:

[0006] Obtain the average ambient temperature, average ambient humidity, and average solar radiation intensity for the day;

[0007] Calculate the ideal sludge moisture evaporation rate and the sludge treatment capacity for the day to obtain the amount of sludge that needs to be treated that day.

[0008] Determine whether to store sludge in the sludge temporary storage facility of the sludge solar drying system or to remove sludge from the sludge temporary storage facility for drying.

[0009] If the difference between the sludge treatment capacity and the amount of sludge to be treated on that day is negative, then the sludge will be stored in the sludge temporary storage facility.

[0010] If the difference between the sludge treatment capacity and the amount of sludge to be treated that day is positive, the sludge is removed from the sludge storage facility for drying.

[0011] Beneficial effects: This invention calculates the sludge processing capacity of a solar sludge drying system with sludge temporary storage facilities and the amount of sludge to be processed daily, and judges the difference to adjust the sludge storage amount or the amount of drying, thereby optimizing the sludge drying scheme. It effectively solves the problem of uneven distribution of drying capacity of solar sludge drying technology in winter or rainy season, ensuring that sludge can be dried under suitable climatic conditions, thereby improving the efficiency and quality of sludge drying.

[0012] In one alternative implementation, it further includes:

[0013] Calculate the sludge storage capacity and sludge treatment capacity of a solar sludge drying system with sludge temporary storage facilities.

[0014] The methods for calculating the storage capacity of sludge in a solar sludge drying system with sludge temporary storage facilities include:

[0015] Obtain the local average temperature and average humidity for each month over the years, and obtain the average solar radiation intensity for each month;

[0016] Calculate the ideal monthly sludge moisture evaporation rate;

[0017] The annual average reference daily evaporation rate is calculated based on the ideal monthly sludge moisture evaporation rate.

[0018] Calculate the design daily evaporation of the sludge solar drying system with sludge temporary storage facilities, and set the design daily evaporation to be no greater than the annual average reference daily evaporation;

[0019] Calculate the ratio of ideal sludge moisture evaporation to design daily evaporation for each month of the year, and calculate the evaporation compensation coefficient for each month. Then calculate the sum of the evaporation compensation for several consecutive months of the year and select the maximum value.

[0020] The reference storage capacity and design storage capacity of the sludge temporary storage facility are calculated based on the maximum sum of evaporation compensation amounts for several consecutive months throughout the year.

[0021] Beneficial effects: This invention calculates the reference storage capacity of the sludge storage system based on the average temperature, average humidity and average solar radiation intensity of the local area over the years, so as to match the storage capacity and drying capacity of the sludge temporary storage facility, avoid excessive accumulation of sludge or insufficient moisture content before leaving the plant, and optimize the sludge drying scheme.

[0022] In one alternative implementation, the designed daily evaporation is set to 0.8 to 1 times the annual average reference daily evaporation.

[0023] Beneficial effects: This invention sets the designed daily evaporation rate to be no greater than the annual average reference daily evaporation rate, which can ensure the stability of the operation of the sludge solar drying system with sludge temporary storage facilities.

[0024] In one alternative implementation, the sludge temporary storage facility is designed to have a storage capacity of not less than 120% of the reference storage capacity.

[0025] Beneficial effects: The present invention sets a certain redundancy in the design storage capacity of the sludge solar drying system with sludge temporary storage facilities, which can improve the stability of the sludge solar drying system with sludge temporary storage facilities and avoid the impact of unexpected severe weather on the sludge solar drying system with sludge temporary storage facilities.

[0026] Secondly, the present invention also provides a sludge solar drying system with a sludge temporary storage facility, in conjunction with the above-mentioned operation method of the sludge solar drying system with a sludge temporary storage facility, comprising:

[0027] The greenhouse is equipped with sludge temporary storage facilities and a sludge drying platform. The greenhouse is also equipped with air inlets and outlets.

[0028] The first sludge conveying pipe connects the sludge temporary storage facility and the sludge drying platform.

[0029] The mud-turning equipment is mounted on the drying platform.

[0030] In one alternative implementation, the sludge temporary storage facility is located below the sludge drying platform.

[0031] Beneficial effects: This invention places the sludge temporary storage facility below the sludge drying platform, reducing the land occupied by the sludge solar drying system with the sludge temporary storage facility, making the sludge drying equipment more integrated, facilitating the allocation of sludge storage and drying, and improving the efficiency of sludge drying.

[0032] In one alternative implementation, the bottom of the sludge temporary storage facility is an arc surface or a slope.

[0033] Beneficial effects: The bottom of the sludge temporary storage facility is an arc or sloping surface, so that the sludge stored in the sludge temporary storage facility can slide to the bottom, making it easy to remove the sludge from the sludge temporary storage facility.

[0034] In one alternative embodiment, the sludge solar drying system with a sludge temporary storage facility also includes load-bearing columns, with multiple load-bearing columns arranged between the sludge temporary storage facility and the sludge drying platform.

[0035] Beneficial effects: The present invention improves the stability of the sludge drying platform by setting a load-bearing column between the sludge temporary storage facility and the sludge drying platform.

[0036] In one alternative implementation, the sludge storage facility is equipped with a cleaning component.

[0037] Beneficial effects: By incorporating cleaning components, this invention facilitates the rinsing and cleaning of the interior of the sludge temporary storage facility.

[0038] In one alternative implementation, the mud-turning device includes:

[0039] Tracks, multiple tracks are set in parallel on the sludge drying platform;

[0040] The crossbeam is movably mounted on the track.

[0041] The rollers are movably mounted on the crossbeam and are movably connected to the track.

[0042] Mud-turning teeth, multiple mud-turning teeth are set at the bottom of the crossbeam;

[0043] The mud hopper is movably mounted on the crossbeam.

[0044] Beneficial effects: By setting the crossbeam on multiple tracks, this invention can improve the support capacity of the crossbeam and avoid excessive deflection of the crossbeam when spreading and turning the sludge on the sludge drying platform, which would cause uneven sludge spreading by the turning teeth.

[0045] In one alternative embodiment, the greenhouse includes walls and a roof. The walls are adapted to be vertically installed on the building ground. Air inlets and outlets are installed on two opposite walls. The height of the outlets is lower than that of the inlets. The outlets are located above the sludge drying platform. The roof is installed on top of the walls.

[0046] Beneficial effects: By setting the height of the air outlet to be lower than that of the air inlet, when external air blows into the greenhouse, it can create strong turbulence on the surface of the sludge, thereby accelerating the drying of the sludge.

[0047] In one alternative embodiment, the sludge solar drying system with sludge temporary storage facilities further includes a blower, which is installed at the air inlet and / or air outlet. Attached Figure Description

[0048] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the structure of a solar-powered sludge drying system with a sludge temporary storage facility according to an embodiment of the present invention.

[0050] Figure 2 This is a schematic diagram of the structure for removing the roof and walls in a sludge solar drying system with a sludge temporary storage facility according to an embodiment of the present invention.

[0051] Figure 3 This is a schematic diagram of the structure of the sludge temporary storage facility and the sludge drying platform in a sludge solar drying system with a sludge temporary storage facility according to an embodiment of the present invention.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1. Greenhouse; 101. Sludge temporary storage facility; 102. Sludge drying platform; 103. Air inlet; 104. Air outlet; 105. Wall; 106. Roof;

[0054] 2. First mud conveying pipe;

[0055] 3. Mud-turning equipment; 301. Track; 302. Crossbeam; 303. Roller; 304. Mud-turning teeth; 305. Mud-distributing hopper; 306. Pump body;

[0056] 4. Load-bearing columns;

[0057] 5. Cleaning parts;

[0058] 6. Second mud conveying pipe. Detailed Implementation

[0059] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] The following combination Figures 1 to 3 The following describes embodiments of the present invention.

[0061] According to an embodiment of the present invention, in one aspect, a method for operating a sludge solar drying system with a sludge temporary storage facility is provided, comprising:

[0062] Obtain the average ambient temperature, average ambient humidity, and average solar radiation intensity for the day;

[0063] Calculate the ideal sludge moisture evaporation rate and the sludge treatment capacity for the day to obtain the amount of sludge that needs to be treated that day.

[0064] Determine whether to store sludge in or remove sludge from the sludge temporary storage facility 101 in the sludge solar drying system with sludge temporary storage facility for drying.

[0065] If the difference between the sludge treatment capacity and the amount of sludge to be treated on the day is negative, then the sludge will be stored in the sludge temporary storage facility 101.

[0066] If the difference between the sludge treatment capacity and the amount of sludge to be treated that day is positive, the sludge will be removed from the sludge temporary storage facility 101 and dried.

[0067] Specifically, in this embodiment, the average daily ambient temperature is t, the average ambient humidity is RH, the average solar radiation intensity is E, and the ideal daily sludge moisture evaporation rate is m. v Reference moisture evaporation rate is m f The sludge treatment capacity on that day was m fs .

[0068] In this embodiment, the ideal sludge moisture evaporation m for the day is calculated according to the following formula (1). v .

[0069] m v =0.055×t-0.029×RH+0.0046×E+0.94 (1)

[0070] From the perspective of stable system operation, the daily reference moisture evaporation rate (m) f The evaporation rate of sludge moisture must not exceed the ideal evaporation rate of sludge for that day (m). v .

[0071] m f ≤εm v (2)

[0072] Wherein, ε is the design coefficient, and the value of ε ranges from 0.8 to 1.

[0073] Greenhouse 1's daily sludge treatment capacity (m³) fs Reference daily water evaporation rate (m³) for greenhouse 1 f The following relationship exists:

[0074]

[0075] Among them, W in Moisture content of sludge entering the influent, unit: number of kilograms of water content per kilogram of dry sludge;

[0076] W o Moisture content of sludge, unit: number of kilograms of water content per kilogram of dry sludge;

[0077] S represents the design area of ​​the sludge solar drying system with sludge temporary storage facilities, in square meters.

[0078] The actual amount of sludge received on that day is the sludge treatment capacity (m). s The amount of sludge to be stored is m c for:

[0079] m c =m fs -m s (4)

[0080] If m c A negative number means that sludge m was stored in sludge temporary storage facility 101 on that day. c Kilograms, or conversely, sludge m stored in sludge temporary storage facility 101 is taken. c Kilograms are dried.

[0081] This invention calculates the sludge processing capacity of a solar sludge drying system with sludge temporary storage facilities and obtains the amount of sludge to be processed daily. It then judges the difference between the sludge processing capacity and the amount of sludge to be dried, thereby optimizing the sludge drying scheme. This effectively solves the problem of uneven distribution of drying capacity in solar sludge drying technology during winter or rainy seasons, ensuring that sludge can be dried under suitable climatic conditions, thus improving the efficiency and quality of sludge drying.

[0082] In one embodiment, the operation method of a sludge solar drying system with a sludge temporary storage facility further includes:

[0083] Calculate the sludge storage capacity and sludge treatment capacity of a solar sludge drying system with sludge temporary storage facilities.

[0084] The method for calculating the storage capacity of sludge temporary storage facility 101 in a sludge solar drying system with sludge temporary storage facilities includes:

[0085] Obtain the local average temperature and average humidity for each month over the years, and obtain the average solar radiation intensity for each month;

[0086] Calculate the ideal monthly sludge moisture evaporation rate;

[0087] The annual average reference daily evaporation rate is calculated based on the ideal monthly sludge moisture evaporation rate.

[0088] Calculate the design daily evaporation of the sludge solar drying system with sludge temporary storage facilities, and set the design daily evaporation to be no greater than the annual average reference daily evaporation;

[0089] Calculate the ratio of ideal sludge moisture evaporation to design daily evaporation for each month of the year, and calculate the evaporation compensation coefficient for each month. Then calculate the sum of the evaporation compensation for several consecutive months of the year and select the maximum value.

[0090] The reference storage capacity and design storage capacity of sludge temporary storage facility 101 are calculated based on the maximum sum of evaporation compensation amounts for several consecutive months throughout the year.

[0091] The reference storage capacity and design storage capacity of sludge temporary storage facility 101 are calculated based on the maximum sum of evaporation compensation amounts for several consecutive months throughout the year.

[0092] Specifically, in this embodiment, S1: The obtained local monthly average temperature t i and average humidity RH i The temperature t at the air inlet 103 of greenhouse 1 in and humidity RH in The obtained monthly average solar radiation intensity is E i .

[0093] Where i represents the month, and its value ranges from 1 to 12;

[0094] S2: Calculate the ideal daily evaporation rate of sludge per month (m) according to the following formula (5). vi .

[0095]

[0096] Among them, t i The average temperature for month i, in degrees Celsius;

[0097] RH i The average humidity for month i;

[0098] E i The average solar radiation intensity for month i, in watts per square meter;

[0099] m vi The ideal daily evaporation rate of sludge moisture for month i, in kilograms per square meter per day;

[0100] S3: Annual average reference daily evaporation The calculation method is as follows:

[0101]

[0102] When designing a sludge solar drying system, local climate conditions and the annual average reference daily evaporation calculated under these conditions must be taken into account. From the perspective of stable system operation, the designed evaporation rate must not exceed the annual average reference daily evaporation rate.

[0103]

[0104] in, The average daily evaporation for the whole year is expressed in kilograms per square meter per day.

[0105] D i The number of days in month i;

[0106] m h The design daily evaporation rate is expressed in kilograms per square meter per day.

[0107] ε is the design coefficient.

[0108] S4: Calculate the ideal sludge moisture evaporation rate (m) over 12 months. vi With design daily evaporation m h The ratio is α i And calculate the evaporation compensation coefficient for each month as 1-α. i coefficient 1-α i When the value is positive, the monthly drying capacity of the sludge solar drying system with sludge temporary storage facilities is insufficient, requiring sludge storage. Taking N as 1 to 6, calculate the sum of the evaporation compensation for N consecutive months out of 12, and select the maximum value Mv.

[0109] The actual sludge treatment volume generally does not change much over time and can be considered as the designed sludge treatment volume. The sludge treatment capacity of Greenhouse 1 and its designed daily evaporation rate are related as follows:

[0110]

[0111] Since the moisture content of the sludge entering and leaving greenhouse 1 is related to the sludge treatment process, it is generally a fixed value for a specific greenhouse 1. Therefore, the designed daily processing capacity of greenhouse 1 is directly proportional to the designed daily evaporation capacity of greenhouse 1.

[0112] The reference storage capacity M of sludge temporary storage facility 101 is:

[0113] M = 30 × Mv × m s (9)

[0114] The designed storage capacity Md of the sludge temporary storage facility 101 is:

[0115] Md=M*η (10)

[0116] Where S is the design area of ​​the sludge solar drying system with sludge temporary storage facilities, in square meters;

[0117] M represents the reference sludge storage capacity, in kg.

[0118] Md represents the designed sludge storage capacity, in kg.

[0119] η is a reference coefficient greater than 1.

[0120] W in Moisture content of sludge entering the influent, unit: number of kilograms of water content per kilogram of dry sludge;

[0121] W o Moisture content of sludge, unit: number of kilograms of water content per kilogram of dry sludge;

[0122] m s Sludge treatment capacity, unit: kilograms per square meter per day.

[0123] In this embodiment, the amount of sludge to be stored is m c The sludge storage capacity shall not exceed the designed sludge storage capacity (Md).

[0124] This invention calculates the reference storage capacity of the sludge storage system based on the average temperature, average humidity, and average solar radiation intensity of the local area over the years, so as to ensure that the sludge storage capacity and drying capacity of the sludge solar drying system with sludge temporary storage facilities are matched during the year-round operation. This avoids excessive sludge accumulation leading to insufficient drying capacity or insufficient sludge storage leading to insufficient sludge drying capacity, thus optimizing the sludge drying scheme.

[0125] In one embodiment, the design evaporation rate is set to 0.8 to 1 times the annual average reference daily evaporation rate.

[0126] In this embodiment, the evaporation rate is preferably set to 0.8 times the average daily evaporation rate of the whole year.

[0127] This invention sets the designed evaporation rate to be no greater than the annual average reference daily evaporation rate, which can ensure the stability of the operation of the sludge solar drying system with sludge temporary storage facilities.

[0128] In one embodiment, the sludge temporary storage facility 101 is designed to have a storage capacity of not less than 120% of the reference storage capacity, and preferably is designed to have a storage capacity of 120% of the reference storage capacity.

[0129] This invention sets a certain redundancy in the design storage capacity of the sludge solar drying system with sludge temporary storage facilities, which can improve the stability of the sludge solar drying system with sludge temporary storage facilities and avoid the impact of adverse external weather on the sludge solar drying system with sludge temporary storage facilities.

[0130] In this embodiment, assuming the ambient temperature, humidity, and solar radiation in a certain location are as shown in Table 1 below, and the construction area of ​​greenhouse 1 is 20,000 square meters, the following results can be obtained based on the above calculation method:

[0131]

[0132] Table 1 Monthly Average Temperature, Humidity, and Solar Radiation in a Certain Area

[0133] Based on formulas (1) to (10) above, the annual average reference daily evaporation is calculated to be 44.7t, and the designed daily evaporation is 35.8t. As shown in Table 1, from November to February of the following year, the monthly evaporation is less than the reference evaporation. Therefore, the calculated M... v The value is 1.02. Considering a margin of 20%, the sludge temporary storage equipment needs to meet a storage capacity of at least 1.22 months.

[0134] According to an embodiment of the present invention, on the other hand, such as Figures 1 to 3 As shown, a sludge solar drying system with a sludge temporary storage facility is also provided, which is used to cooperate with the above-mentioned operation method of the sludge solar drying system with a sludge temporary storage facility. It includes a greenhouse 1, a first sludge conveying pipe 2 and a sludge turning device 3. The greenhouse 1 is equipped with a sludge temporary storage facility 101 and a sludge drying platform 102. The greenhouse 1 is equipped with an air inlet 103 and an air outlet 104. The first sludge conveying pipe 2 connects the sludge temporary storage facility 101 and the sludge drying platform 102. The sludge turning device 3 is movably installed on the drying platform.

[0135] Specifically, in this embodiment, the greenhouse 1 is not specifically limited. To conform to the actual situation, the greenhouse 1 in this embodiment adopts a transparent top structure so that solar radiation can dry the sludge on the sludge drying platform 102.

[0136] In this embodiment, both the sludge temporary storage facility 101 and the sludge drying platform 102 are located inside the greenhouse 1. The sludge temporary storage facility 101 and the sludge drying platform 102 are connected by a first sludge conveying pipe 2. A pump body 306 is provided on the first sludge conveying pipe 2 for pumping the sludge in the sludge temporary storage facility 101 to the sludge drying platform 102. In this embodiment, the pump body 306 is not specifically limited. To conform to the actual situation, the pump body 306 in this embodiment can be a plunger pump.

[0137] In this embodiment, the greenhouse 1 is provided with an air inlet 103 and an air outlet 104. External air enters the greenhouse 1 through the air inlet 103 and exits the greenhouse 1 through the air outlet 104. During the air flow, the water vapor evaporated inside the greenhouse 1 can be carried away, thereby accelerating the drying of sludge.

[0138] In this embodiment, the sludge turning device 3 can operate on the drying platform, thereby flattening and turning the sludge output through the first sludge conveying pipe 2 on the sludge drying platform 102, thus accelerating the sludge drying process.

[0139] The present invention reduces the land and other resources required for building an additional sludge storage facility 101 by setting up the sludge temporary storage facility 101 and the sludge drying platform 102 in the same greenhouse 1, while facilitating the allocation of sludge storage and drying and improving the efficiency of sludge drying.

[0140] In one embodiment, such as Figures 1 to 3 As shown, the sludge temporary storage facility 101 is located below the sludge drying platform 102.

[0141] Specifically, in this embodiment, the sludge temporary storage facility 101 is set at the bottom of the greenhouse 1, and the sludge drying platform 102 is set above the sludge temporary storage facility 101. In this embodiment, a sunken space can be set at the bottom of the greenhouse 1 as the sludge temporary storage facility 101, and the sludge drying platform 102 can be suspended in the space above the sludge temporary storage facility 101. The first sludge conveying pipe 2 is vertically set in the greenhouse 1, with one end of the first sludge conveying pipe 2 extending to the sludge temporary storage facility 101 and the other end extending to the sludge drying platform 102.

[0142] In this embodiment, the greenhouse 1 is also provided with a second sludge conveying pipe 6, which is used to input external sludge into the sludge temporary storage facility 101.

[0143] The present invention places the sludge temporary storage facility 101 below the sludge drying platform 102, which reduces the land occupied by the sludge solar drying system with the sludge temporary storage facility and makes the sludge drying equipment more integrated.

[0144] In one embodiment, such as Figures 1 to 3 As shown, the bottom of the sludge temporary storage facility 101 is an arc surface or a slope.

[0145] Specifically, in this embodiment, the bottom of the sludge temporary storage facility 101 is arc-shaped, with the arc-shaped surface concave downward and inclined toward the first sludge conveying pipe 2. When sludge is stored in the sludge temporary storage facility 101, the sludge slides down to the side of the first sludge conveying pipe 2 under its own gravity, so that the first sludge conveying pipe 2 can be pumped to the sludge drying platform 102 by the pump body 306.

[0146] The present invention has a curved or sloping bottom of the sludge temporary storage facility 101, so that the sludge stored in the sludge temporary storage facility 101 can slide to the bottom, making it easy to remove the sludge from the sludge temporary storage facility 101.

[0147] In one embodiment, such as Figures 1 to 3 As shown, the sludge solar drying system with sludge temporary storage facility also includes load-bearing columns 4, and multiple load-bearing columns 4 are arranged between the sludge temporary storage facility 101 and the sludge drying platform 102.

[0148] Specifically, in this embodiment, one side of the sludge drying platform 102 is connected to the inner wall of the greenhouse 1, and the other side extends above the sludge temporary storage facility 101. Several load-bearing columns 4 are provided at the bottom of the side of the sludge drying platform 102 that extends outward. The bottom of the load-bearing columns 4 is supported inside the sludge temporary storage facility 101, which can support the sludge drying platform 102.

[0149] In this embodiment, a sludge inlet is provided between the sludge drying platform 102 and the sludge temporary storage facility 101, and the first sludge conveying pipe 2 is located at the sludge inlet.

[0150] The present invention provides a load-bearing column 4 between the sludge temporary storage facility 101 and the sludge drying platform 102 to improve the stability of the sludge drying platform 102.

[0151] In one embodiment, such as Figure 3 As shown, the sludge temporary storage facility 101 is equipped with a cleaning component 5.

[0152] Specifically, in this embodiment, the cleaning component 5 is not specifically limited. To conform to reality, in this embodiment, the cleaning component 5 is a number of high-pressure nozzles installed on the inner wall of the sludge temporary storage facility 101. The water outlet direction of the high-pressure nozzles is towards the bottom arc surface of the sludge temporary storage facility 101. When cleaning inside the sludge temporary storage facility 101, the high-pressure nozzles can spray high-pressure water to rinse the wall surface of the sludge temporary storage facility 101. The rinsing wastewater can be extracted by a plunger pump.

[0153] The present invention facilitates the rinsing and cleaning of the interior of the sludge temporary storage facility 101 by providing a cleaning component 5.

[0154] In one embodiment, such as Figure 1 and Figure 2 As shown, the sludge turning device 3 includes a track 301, a crossbeam 302, rollers 303, sludge turning teeth 304, and a sludge distribution hopper 305. Multiple tracks 301 are arranged in parallel on the sludge drying platform 102. The crossbeam 302 is movably mounted on the track 301. The rollers 303 are movably mounted on the crossbeam 302 and are movably connected to the track 301. Multiple sludge turning teeth 304 are located at the bottom of the crossbeam 302, and the sludge distribution hopper 305 is movably mounted on the crossbeam 302.

[0155] Specifically, in this embodiment, the number of tracks 301 is not specifically limited. In order to reduce the deflection of the crossbeam 302, three tracks 301 are set in this embodiment, located on both sides of the greenhouse 1 and on the sludge drying platform 102 near the sludge inlet of the sludge temporary storage facility 101. The three tracks 301 are arranged in parallel, and the height of the tracks 301 located on both sides of the greenhouse 1 is slightly higher than the height of the tracks 301 set on the sludge drying platform 102.

[0156] In this embodiment, the crossbeam 302 is perpendicular to the track 301. Three rollers 303 are correspondingly provided at the bottom of the crossbeam 302. The rollers 303 are movably connected to the track 301. By moving the rollers 303 on the track 301, the sludge hopper 305 on the crossbeam 302 can be moved on the sludge drying platform 102.

[0157] In this embodiment, the sludge hopper 305 is movably mounted on the crossbeam 302 and can move back and forth along the crossbeam 302 in the horizontal direction. The sludge hopper 305 is funnel-shaped, with the top opening for collecting sludge from the first sludge conveying pipe 2 and the bottom opening for spreading sludge onto the sludge drying platform 102.

[0158] In this embodiment, a number of sludge-turning teeth 304 are vertically arranged on the crossbeam 302. The bottom of the sludge-turning teeth 304 can be inserted into the sludge on the sludge drying platform 102. By moving the crossbeam 302, the sludge-turning teeth 304 can turn over the sludge spread on the sludge drying platform 102 and spread it evenly, so as to accelerate the sludge drying.

[0159] By setting the crossbeam 302 on multiple tracks 301, the present invention can improve the support capacity of the crossbeam 302 and avoid excessive deflection of the crossbeam 302 when spreading and turning sludge on the sludge drying platform 102, which would cause uneven sludge spreading by the turning teeth 304.

[0160] In one embodiment, such as Figure 1 As shown, the greenhouse 1 includes walls 105 and a roof 106. The walls 105 are suitable for being vertically installed on the building ground. The air inlet 103 and the air outlet 104 are installed on two opposite walls 105. The height of the air outlet 104 is lower than that of the air inlet 103. The air outlet 104 is located above the sludge drying platform 102. The roof 106 is installed on the top of the walls 105.

[0161] Specifically, in this embodiment, the greenhouse 1 is surrounded by walls 105 and topped by a roof 106. The roof 106 is made of transparent materials, such as glass or transparent plastic.

[0162] In this embodiment, the air inlet 103 and the air outlet 104 are set on two walls 105 parallel to the track 301. The height of the air outlet 104 is at least 1 meter lower than the height of the air inlet 103, and the height of the air outlet 104 is no more than 0.5 meters higher than the upper surface of the sludge drying platform 102. This arrangement can create strong turbulence on the sludge surface.

[0163] The present invention sets the height of the air outlet 104 to be lower than the height of the air inlet 103. When the outside air blows into the greenhouse 1, it can create a strong turbulence on the surface of the sludge, thereby accelerating the drying of the sludge.

[0164] In one embodiment, the sludge solar drying system with sludge temporary storage facilities further includes a fan, which is installed on the air inlet 103 and / or air outlet 104.

[0165] Specifically, in this embodiment, a blower is arranged at the air inlet 103 to blow outside air into the greenhouse 1, and no blower is arranged at the air outlet 104.

[0166] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for operating a sludge solar drying system with a sludge temporary storage facility, characterized in that, include: Obtain the average ambient temperature, average ambient humidity, and average solar radiation intensity for the day; Calculate the ideal sludge moisture evaporation rate and the sludge treatment capacity for the day to obtain the amount of sludge that needs to be treated that day. Determine whether to store sludge in the sludge storage facility (101) of the sludge solar drying system with sludge storage facility or to remove sludge from the sludge storage facility (101) for drying; If the difference between the sludge treatment capacity and the amount of sludge to be treated on the day is negative, then the sludge will be stored in the sludge temporary storage facility (101). If the difference between the sludge treatment capacity and the amount of sludge to be treated on the day is positive, the sludge is taken out from the sludge temporary storage facility (101) for drying. Calculate the sludge storage capacity and sludge treatment capacity of a solar sludge drying system with sludge temporary storage facilities. The methods for calculating the sludge storage capacity of a solar sludge drying system with sludge temporary storage facilities include: Obtain the local average temperature and average humidity for each month over the years, and obtain the average solar radiation intensity for each month; Calculate the ideal daily sludge evaporation rate for each month; Calculate the annual average reference daily evaporation rate based on the ideal monthly sludge daily evaporation rate; Calculate the design daily evaporation of the sludge solar drying system with sludge temporary storage facilities, and set the design daily evaporation to be no greater than the annual average reference daily evaporation; Calculate the ratio of ideal sludge moisture evaporation to design daily evaporation for each month of the year, and calculate the evaporation compensation coefficient for each month. Then calculate the sum of the evaporation compensation for several consecutive months of the year and select the maximum value. The reference and design storage capacities for a sludge solar drying system with sludge temporary storage facilities are calculated based on the maximum sum of evaporation compensation amounts for several consecutive months throughout the year.

2. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 1, characterized in that, The designed daily evaporation is set to 0.8 to 1 times the annual average reference daily evaporation.

3. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 1, characterized in that, The design storage capacity of the sludge temporary storage facility shall be no less than 120% of the reference storage capacity.

4. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 1, characterized in that, The sludge solar drying system with sludge temporary storage facilities includes: Greenhouse (1), the greenhouse (1) is equipped with a sludge temporary storage facility (101) and a sludge drying platform (102), and the greenhouse (1) is equipped with an air inlet (103) and an air outlet (104). The first sludge conveying pipe (2) is connected to the sludge temporary storage facility (101) and the sludge drying platform (102). A sludge turning device (3) is movably mounted on the sludge drying platform (102).

5. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 4, characterized in that, The sludge temporary storage facility (101) is located below the sludge drying platform (102).

6. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 5, characterized in that, The bottom of the sludge temporary storage facility (101) is an arc surface or a slope.

7. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 4, characterized in that, The sludge solar drying system with sludge temporary storage facilities also includes: Load-bearing columns (4), a plurality of the load-bearing columns (4) are arranged between the sludge temporary storage facility (101) and the sludge drying platform (102).

8. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 4, characterized in that, The sludge temporary storage facility (101) is equipped with a cleaning component (5).

9. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 4, characterized in that, The mud-turning equipment (3) includes: Tracks (301), a plurality of said tracks (301) are arranged in parallel on the sludge drying platform (102); A crossbeam (302) is movably mounted on the track (301); A roller (303) is movably mounted on the crossbeam (302) and is movably connected to the track (301); Mud-turning teeth (304), a plurality of said mud-turning teeth (304) are disposed at the bottom of said crossbeam (302); A mud hopper (305) is movably mounted on the crossbeam (302).

10. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 4, characterized in that, The greenhouse (1) includes: The wall (105) is adapted to be vertically installed on the building ground. The air inlet (103) and the air outlet (104) are installed on two opposite walls (105). The height of the air outlet (104) is lower than that of the air inlet (103). The air outlet (104) is located above the sludge drying platform (102). A roof (106) is provided on top of the wall (105).

11. The operation method of the sludge solar drying system with sludge temporary storage facility according to claim 4, characterized in that, The sludge solar drying system with sludge temporary storage facilities also includes: A fan is provided on the air inlet (103) and / or the air outlet (104).

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