CN116862271B - A sludge reuse planning system based on smart cities - Google Patents

Abstract

The invention relates to the technical field of sludge treatment. The invention provides a sludge reuse planning system based on smart cities, including a server, a sludge collection module, a demand assessment module, an interaction module, a sludge treatment and utilization module, and a sludge reuse planning system. The sludge collection module collects sludge status data from the sludge treatment plant in real time and transmits the sludge status data to the demand assessment module. The interactive module is used to collect sludge demand data on the demand side. The demand assessment module collects sludge treatment requirements on the demand side. The demand data of the product is evaluated based on the demand data to form an evaluation result. The sludge treatment and utilization module performs sludge reuse operations based on the evaluation results and prompts managers and demanders. Through the cooperation of the interactive module and the demand assessment module, the present invention enables the entire system to interact with the demand end, has the advantages of high intelligence, high sludge analysis and utilization efficiency, and also takes into account the adaptation to the individual needs of sludge.

Description

A sludge reuse planning system based on smart cities

Technical field

The present invention relates to the technical field of sludge treatment, and in particular to a sludge reuse planning system based on smart cities.

Background technique

In recent years, urban sludge production has increased rapidly. According to statistics, by 2018, my country's sludge production (moisture content 80%) has reached 50Mt. Among them, sludge rich in organic matter, such as food processing wastewater sludge and aquaculture wastewater sludge, contains a large amount of water, nitrogen/phosphorus elements, heavy metals, organic matter, pathogenic microorganisms and other components. Compared with domestic sewage, their nitrogen The content of nutrients such as phosphorus and heavy metals is high, and random stacking or simple handling can easily cause secondary pollution.

At present, there are two categories of resource utilization using existing technologies: fire disposal and wet disposal: the fire disposal process consumes a lot of energy, causes serious pollution, and the resource utilization rate is not high. Iron and chromium cannot be utilized, and it is only suitable for copper and nickel. High-quality materials are technologies that are gradually phased out; for example, the patent application with the publication number JP3028360U. The wet treatment and disposal technology has the following shortcomings: (1) The scale of disposal is limited, the process is incomplete, and the comprehensive utilization rate is low. If the waste water, waste gas and waste residue during the production process are not properly disposed of, it is easy to cause secondary pollution; (2) The treatment process is simple and has poor adaptability to raw materials. It can only process and recycle sludge with high nickel and copper content; (3) Most of them can only produce crude products with low economic benefits. At the same time, they cannot achieve high-efficiency recycling of sludge. Use, for example, patent applications with publication numbers CN1005134B and US3931007A.

At the same time, sludge reuse in the existing technology cannot be produced according to demand, and there is a lack of interaction between supply and demand, resulting in a large amount of land occupied after sludge treatment, and problems such as the mismatch between the supply and demand of sludge.

In recent years, with the acceleration of urbanization, the production of sludge has continued to increase. Sludge not only takes up a lot of land, but may also cause secondary pollution to the environment. How to effectively process and utilize sludge has become an important issue in current environmental protection and resource recycling.

The present invention was made in order to solve common problems in the field such as the inability to reuse sludge, low utilization efficiency, lack of intelligent analysis, inability to interact with the sludge demand side, and inability to realize intelligent analysis, processing and utilization of sludge.

Contents of the invention

The purpose of the present invention is to propose a sludge reuse planning system based on smart cities in view of the current shortcomings.

In order to overcome the shortcomings of the prior art, the present invention adopts the following technical solutions:

A sludge reuse planning system based on smart cities. The sludge reuse planning system includes a server. The sludge reuse planning system also includes a sludge collection module, a demand assessment module, an interactive module, a sludge processing and Utilization module, the server is connected to the sludge collection module, demand assessment module, interaction module, sludge treatment and utilization module respectively;

The sludge collection module collects sludge status data of the sludge treatment plant in real time, and transmits the sludge status data to the demand assessment module. The interactive module is used to collect sludge demand data on the demand side. The demand The evaluation module collects the sludge demand data collected by the interactive module, and conducts evaluation based on the demand data to form evaluation results. The sludge treatment and utilization module performs sludge reuse operations based on the evaluation results, and reports to managers and The demand side prompts;

The interactive module includes an interactive unit and an identity verification unit. The identity verification unit verifies the identity of the user. The interactive unit submits sludge demand data for the demand side that passes the identity verification;

The demand assessment module obtains the sludge demand data and calculates the demand Q and drying index Drying according to the following formula:

;

In the formula, Q _base is the basic demand, and △Q is the change compared with the previous sludge demand, which satisfies: , Q _{current order} is the demand for the current order, Q _{previous order} is the demand determined in the last demand data, F _feedback is the dryness index adjusted based on the previously supplied product quality feedback, P _spec is the dryness in the demand data Level, its value is obtained from demand data, U _purpose is the degree of impact of the use of demand data on drying, and its value is set based on experience by industry experts;

The demand assessment module transmits the assessment results to the sludge treatment and utilization module to trigger the sludge treatment and utilization module to reuse the sludge.

Optionally, the sludge treatment and utilization module includes a drying unit and a quality inspection and analysis unit. The drying unit dries the sludge, and the quality inspection and analysis unit collects sewage processed by the drying unit. Test data of mud products and conduct quality inspection based on the test data;

Wherein, the drying unit includes a drying chamber, a drying component and a pushing component. The drying chamber is used to store the sludge, and the drying component dries the sludge in the drying chamber. Chemical operation, the pushing member pushes the dried sludge that has passed the quality inspection to enter the packaging process;

Wherein, the pushing member is disposed in the drying chamber.

Optionally, the sludge collection module is arranged in different classification tanks of the sludge treatment plant. The sludge collection module includes a sludge collection unit and a data transmission unit. The sludge collection unit collects sewage in the classification tank. The data transmission unit transmits the sludge status data collected by the sludge collection unit to the demand assessment module.

Optionally, the quality inspection and analysis unit includes a collection component and an analyzer. The collection component collects detection data of the dried sludge products in the drying chamber. The analyzer analyzes the sewage sludge based on the detection data. Mud products are analyzed;

The collection component includes a load sensor, and the load sensor collects real-time detection data of sludge in the drying chamber;

The analyzer obtains the detection data collected by the collection component, and calculates the real-time drying index Drying _current according to the following formula:

;

In the formula, α is the quality influence weight, its value is set by the system according to the actual situation, β is the temperature influence weight, its value is set by the system according to the actual situation, and the two weights satisfy: α+β=1 , Tem is the real-time temperature of the drying process of the drying component, mass _initial is the initial mass of the sludge, and mass _current is the current mass of the sludge;

Determine the drying time based on the real-time drying index:

;

In the formula, ω is a predetermined time coefficient, and its value is directly determined by calling the time coefficient values corresponding to different drying index values preset in the server's database;

If time ≤ 3 hours, use high vacuum sublimation drying method, and at the same time, cooperate with low temperature environment to maintain the ice state;

If 3 < time ≤ 8 hours, use a medium vacuum sublimation drying method. Within this time range, gradually increase the temperature of the drying chamber and reduce the vacuum degree of the environment in the drying chamber;

If time>8 hours, use low vacuum sublimation drying method and gradually increase the temperature of the drying chamber;

Among them, after the sludge is dried, the dried sludge product is transferred to the subsequent packaging process.

Optionally, the drying component includes a refrigeration device, a vacuum pump, a condenser and a heating device. The refrigeration device is used to freeze the moisture in the sludge into ice. The vacuum pump creates a vacuum environment in the drying chamber to make the ice It is directly sublimated into steam, and the condenser is used to collect the steam sublimated from the sludge. The heating device heats the sludge in the drying chamber according to the set needs.

Optionally, the pushing member includes a pushing plate, a pushing rod and a pushing driving mechanism. One end of the pushing rod is drivingly connected to the pushing driving mechanism to form a pushing part, and the pushing part is configured At the bottom wall of the drying chamber, the other end of the pushing rod is connected to the pushing plate;

Wherein, the pushing driving mechanism drives the pushing rod to telescopically move, so that the pushing plate pushes the dried sludge product out of the drying chamber.

Optionally, the collection member is provided on the contact end surface of the pushing plate and the sludge, and the pushing plate and the side wall of the drying chamber are contacted and sealed by a multi-layer sealant gasket.

Optionally, the drying chamber is provided with a barrel-shaped structure with one end open.

Optionally, the freezing device is arranged above the drying chamber with one end open, and is buckled on the drying chamber in the working state, and freezes the sludge in the drying chamber.

Optionally, the heating device is arranged on the side wall of the drying chamber.

The beneficial effects achieved by the present invention are:

1. Through the cooperation of the interaction module and the demand assessment module, the demand data can be accurately analyzed to ensure that the entire system can interact efficiently with the demand side, have the advantages of high intelligence, high sludge analysis and utilization efficiency, and also take into account the pollution control. Suitable for Mud’s individual needs;

2. The drying degree of sludge is analyzed through the quality inspection analysis unit, so that the drying effect of sludge can meet the needs, so that the entire system has the advantages of accurate analysis, strong interactive adaptability and accurate analysis of sludge. ;

3. After being sealed by multiple layers of sealant pads, more sludge can be stored in the drying chamber, and the sludge in the drying chamber is frozen through the freezing device. At the same time, the risk of sludge leakage is also reduced. ;

4. Through the cooperation of the evaluation module and the sludge treatment and utilization module, the sludge treatment can be processed according to the evaluation results of the evaluation module, which is more in line with the demand data on the demand side, has wider adaptability, and is closer to the sewage treatment system. The actual needs of sludge are ensured to ensure the efficiency of sludge utilization and the accuracy of sludge utilization;

5. Through the interactive module, the demand data of the demand side is collected interactively, so that the entire system has the advantage of good interaction comfort, and it also takes into account the verification of the demand side's identity and improves the security of demand data;

6. Through the cooperation between the drying unit and the quality inspection and analysis unit, the traditional drying method is changed, and the sludge drying efficiency is faster. It also takes into account different drying needs, with good interactive effect and drying effect. It has the advantages of high chemical efficiency and accurate intelligent analysis.

Description of drawings

The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily to scale, emphasis instead being placed upon the principles of the illustrated embodiments. In different views, the same reference numbers designate the same parts.

Figure 1 is an overall block diagram of the present invention.

Figure 2 is a block diagram of the interaction module and the demand side of the present invention.

Figure 3 is a block diagram of the needs assessment module and the sludge treatment and utilization module of the present invention.

Figure 4 is a block schematic diagram of the drying unit and the quality inspection and analysis unit of the present invention.

Figure 5 is a block schematic diagram of the drying unit of the present invention for processing sludge.

Figure 6 is a block schematic diagram of the pushing member, angle adjustment unit and drying chamber of the present invention.

Figure 7 is a schematic diagram of the application scenario of the classification cell and conductivity sensor of the present invention.

Figure 8 is a partial cross-sectional schematic view of the drying unit, drying cavity, and angle adjustment unit of the present invention.

Explanation of reference signs: 1. Classification tank; 2. Conductivity sensor; 3. Stand; 4. Lifting rod; 5. Freezing plate; 6. Drying chamber; 7. Circulation pump; 8. Loading sensor; 9. Fixed hoop; 10. Sealing rubber pad; 11. Push plate; 12. Push rod; 13. Support frame; 14. Adjustment rod; 15. Bottom frame; 16. Heating device; 17. Vacuum pump; 18. Refrigeration compressor .

Detailed ways

The following is a specific example to illustrate the implementation of the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. In addition, the drawings of the present invention are only simple schematic illustrations and are not depictions based on actual dimensions, as is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the scope of the present invention.

Embodiment 1: According to Figures 1, 2, 3, 4, 5, 6, 7, and 8, this embodiment provides a sludge reuse planning system based on smart cities. The sludge reuse planning system includes a server and a sewage treatment plant. The sludge reuse planning system also includes a sludge collection module, a demand assessment module, an interaction module, a sludge treatment and utilization module, and the server is connected to the sewage treatment plant respectively. The sludge collection module, demand assessment module, interaction module, sludge treatment and utilization module are connected, and the intermediate data, process data and evaluation results of the sludge collection module, demand assessment module, interaction module, sludge treatment and utilization module are connected and the analysis results are stored in the database of the server for query;

The sludge collection module collects sludge status data of the sewage treatment tank in the sludge treatment plant in real time, and transmits the sludge status data to the demand assessment module. The interactive module is used to collect sludge demand data on the demand side. , the demand assessment module collects the sludge demand data collected by the interactive module, and evaluates the sludge demand data to form an evaluation result, and the sludge treatment and utilization module performs sludge reuse operations based on the evaluation results. , and prompt the managers and demand side;

The sludge reuse planning system also includes a central processor, which is connected to the sludge collection module, the demand assessment module, the interaction module, the sludge treatment and utilization module, and is based on the central processing unit. The controller controls the sludge collection module, demand assessment module, interaction module, sludge treatment and utilization module to ensure coordination between each module and facilitate centralized management;

The interactive module includes an interactive unit and an identity verification unit. The identity verification unit verifies the identity of the user. The interactive unit submits sludge demand data for the demand side that passes the identity verification;

In this embodiment, after the demand side registers an account through the interactive unit, it generates an account and a password; wherein the registered account and password are stored in the server;

The identity verification unit verifies the account number and password that the demand side has registered. If it is the same as the account number and password stored in the server database, the verification is passed, and the demand side is allowed to submit demand data in the account;

If the account and password are different from those stored in the server database and the identity verification fails, the demand end is not allowed to submit demand data in the account;

When the demand side is allowed to access, the demand side is allowed to input the required demand data and submit the demand data form;

After the form is submitted to the server, the server evaluates the demand data through the demand evaluation module to form an evaluation result, and triggers the sludge processing and utilization module to perform sludge processing according to the evaluation result. reuse operations;

In this embodiment, the reuse operation includes drying and transporting sludge;

The demand data includes but is not limited to the following: demand, product specifications (drying degree, particle size, chemical composition (for example, for some specific applications, low levels of heavy metals or other harmful substances may be required)) , price and contract information (expected price, contract period and payment methods and terms), feedback and comments, special needs or remarks (special handling requirements (for example, the need for specific packaging or storage conditions), other remarks - such as regarding product applications or special instructions for use), drying grade and impact of use on drying, etc.;

Through the interaction module, the interactive collection of demand data on the demand side makes the entire system have the advantage of better interaction comfort, and also takes into account the verification of the identity of the demand side, improving the security of demand data;

The demand assessment module obtains the sludge demand data and calculates the demand Q and drying index Drying according to the following formula:

;

In the formula, Q _base is the basic demand, and △Q is the change compared with the previous sludge demand, which satisfies: , Q _{current order} is the demand for the current order, Q _{previous order} is the demand determined in the last demand data (if the demand side initially submits demand data, △Q is equal to the default trial amount provided by the system), if ΔQ is positive , indicating that the demand has increased. If it is negative, it means that the demand has decreased. If it is zero, the demand remains unchanged. F _feedback is the dryness index adjusted based on the previously supplied product quality feedback. P _spec is the dryness in the demand data. Grade, for example, sludge used as biomass fuel may require a higher drying grade. Through research, it is known that for a specific use, a drying grade above 90% is ideal, then P _spec is set to 0.9 or 1 , U _purpose is the degree of impact of the purpose of the required data on drying, and its value is set based on experience by industry experts. For example, sludge used for soil improvement may not need to be too dry; for example, if the product is mainly used for biofuels, From consultation with industry experts, we learned that the best effect is when the drying degree is above 95%, so U _purpose is set to 0.95 or 1;

Among them, the drying index F _feedback adjusted based on the previously supplied product quality feedback is determined according to the following steps:

S1. Introduce a standardized feedback scoring system to allow customers to evaluate previously supplied sludge products, such as:

5 points: fully meets the requirements;

4 points: basically meets the requirements, with small room for improvement;

3 points: medium, needs further improvement;

2 points: Poor, major adjustments are needed;

1 point: completely does not meet the requirements;

Based on this scoring system, an average feedback score F _score for the historical supply sludge product evaluation is obtained from the demand side, that is, the historical sludge product scores are summed each time and divided by the total number of scores;

S2. Determination of drying adjustment factor Δdrying:

;

In the formula, F _target is the desired target score, and its value is set by the system;

S3. Based on the above adjustment factors, the drying index F _feedback adjusted based on the previously supplied product quality feedback:

;

In the formula, F ₀ is the basic drying index, and its value is the default value set by the system (equivalent to the minimum drying value);

The dryness index adjusted based on feedback on the quality of previously supplied products combines actual feedback from customers with target scores, which can effectively fine-tune the degree of dryness to better meet customer needs;

The demand assessment module transmits the assessment results to the sludge treatment and utilization module to trigger the sludge treatment and utilization module to reuse the sludge;

At the same time, through the cooperation of the interactive module and the demand assessment module, the demand data can be accurately analyzed, ensuring that the entire system can interact with the demand side, has the advantages of high intelligence, high sludge analysis and utilization efficiency, and also takes into account the Adaptation to the individual needs of sludge;

Through the cooperation of the evaluation module and the sludge treatment and utilization module, the sludge can be processed according to the evaluation results of the evaluation module, which is more in line with the demand data on the demand side and has wider adaptability. It is also closer to the actual needs of sludge, ensuring the efficiency of sludge utilization and the accuracy of sludge utilization;

Optionally, the sludge treatment and utilization module includes a drying unit and a quality inspection and analysis unit. The drying unit dries the sludge, and the quality inspection and analysis unit collects sewage processed by the drying unit. Test data of mud products and conduct quality inspection based on the test data;

In this embodiment, the drying unit performs drying operations on sludge according to the following processes:

Sludge freezing→main drying→post drying→restoring to normal pressure and packaging→the pushing unit pushes out the dried sludge→packaging and transportation; at the same time, those skilled in the art can also make modifications based on the above process, so it is not necessary Let’s go over them one by one;

Wherein, the drying unit includes a drying chamber 6, a drying component and a pushing component. The drying chamber 6 is used to store the sludge. The drying component is responsible for the sludge in the drying chamber 6. The sludge is dried, and the pushing member pushes the dried sludge that has passed the quality inspection to enter the packaging process;

Wherein, the pushing member is arranged in the drying chamber 6;

In this embodiment, after the sludge is extracted from the sedimentation tank of the sewage treatment plant, it is transported or transported to the drying unit, and the sludge is sequentially dried through the drying unit;

As for how to extract the sludge from the sedimentation tank and transport or transport it to the drying unit, it is a technical means well known to those skilled in the art. Those skilled in the art can consult relevant technical manuals to learn about this technology. Therefore, in this embodiment, details will not be repeated one by one;

The drying unit also includes a stand 3, which is arranged above the drying chamber 6;

Optionally, the sludge collection module is arranged in different classification pools 1 of the sludge treatment plant. The sludge collection module includes a sludge collection unit and a data transmission unit. The sludge collection unit collects the sludge in the classification pool 1. The sludge status data, the data transmission unit transmits the sludge status data collected by the sludge collection unit to the demand assessment module;

The sludge collection unit includes at least one conductivity sensor 2 and a memory. At least one conductivity sensor 2 is arranged on the bottom wall of the classification tank 1 and detects the sewage settled in the classification tank 1. The sludge is detected, and the memory stores the sludge status data detected by at least one conductivity sensor 2;

Among them, the principle of at least one conductivity sensor 2 is to use the conductivity of sludge to be proportional to its concentration. When the conductivity sensor 2 detects the concentration of sludge, the sludge status data can be obtained through the analysis of the sludge concentration. ;

The measurement of sludge concentration based on the conductivity sensor is a technical means well known to those skilled in the art. Those skilled in the art can consult the relevant technical manuals to learn about this technology. Therefore, in this embodiment, it is no longer necessary. A redundant statement;

The data transmission unit includes a data transmitter and a data mark code. The data mark code codes different transmitters to prevent the sludge status data in different classification pools 1 from being classified. The data transmitter will The sludge status data in the classification pool 1 collected by the sludge collection unit is transmitted to the server for storage;

The transmission methods of the data transmitter include wired and wireless transmission methods;

Optionally, the quality inspection and analysis unit includes a collection component and an analyzer. The collection component collects detection data of the dried sludge product in the drying chamber 6. The analyzer analyzes the drying sludge product based on the detection data. Sludge products are analyzed;

The collection component includes a load sensor 8, which collects real-time detection data of sludge in the drying chamber 6;

The analyzer obtains the detection data collected by the collection component, and calculates the real-time drying index Drying _current according to the following formula:

;

In the formula, α is the weight of quality influence, its value is set by the system according to the actual situation, describing the impact of the relationship between the initial quality and the quality lost after drying sludge on the drying index, β is the weight of temperature influence, Its value is set by the system according to the actual situation, describing the relationship between temperature and drying degree, and the two weights satisfy: α+β=1, Tem is the real-time temperature of the drying process of the drying component, mass _initial is the initial mass of sludge, mass _current is the current mass of sludge;

In this embodiment, the quality impact weight α relates to the initial and current sludge quality and drying degree. Its value range is [0,1], which indicates the degree of change of sludge from wet to dry. A smaller value indicates that the sludge dries slower, while a value close to 1 indicates that the sludge dries quickly. , the specific value is set by the system according to the actual situation. The temperature influence weight β adjusts the contribution of temperature to the degree of drying. The value range is [0,1]. A smaller value indicates that the influence of temperature on the degree of drying is greater. Small, while larger values indicate that temperature has a significant impact on the degree of drying. The specific value is set by the system according to the actual situation;

Determine the drying time based on the real-time drying index:

;

In the formula, ω is a predetermined time coefficient, and the specific time coefficient value has been preset in the database of the server (the time coefficient values corresponding to all different drying index values are preset in the database, which can be obtained by looking up the table or calling Directly obtained), for example, by conducting experiments, it was found that when the Drying _current value is 1, 10 hours of drying time is required. Therefore, we can simply set ω = 10 hours;

If time ≤ 3 hours, use high vacuum sublimation drying method, which means a higher degree of vacuum, thereby promoting the rapid sublimation of ice into water vapor. At the same time, it needs to be matched with appropriate low temperature (such as -60°C) to maintain the state of ice. ,

If 3 < time ≤ 8 hours, use the medium vacuum sublimation drying method. Within this time range, you can use a slightly higher temperature of the drying chamber (for example -40°C) and reduce the environment inside the drying chamber. vacuum degree,

If time>8 hours, use low vacuum sublimation drying method. In this case, the temperature can be further increased to the temperature of the drying chamber (for example -20°C);

Among them, after the sludge is dried, the dried sludge product is transferred to the subsequent packaging process.

The drying degree of the sludge is analyzed through the quality inspection analysis unit, so that the drying effect of the sludge can meet the needs, so that the entire system has the advantages of accurate analysis, strong interactive adaptability, and accurate analysis of the sludge. ;

Optionally, the drying component includes a refrigeration device, a vacuum pump 17, a condenser and a heating device 16. The refrigeration device is used to freeze the moisture in the sludge into ice. The vacuum pump 17 creates a vacuum in the drying chamber 6. The environment allows ice to directly sublime into steam, and the condenser is used to collect the steam sublimated from the sludge. The heating device 16 heats the sludge in the drying chamber 6 according to the set needs;

Optionally, the pushing member includes a pushing plate 11, a pushing rod 12 and a pushing driving mechanism. One end of the pushing rod 12 is drivingly connected to the pushing driving mechanism to form a pushing part. The pushing part is provided at the bottom wall of the drying chamber 6, and the other end of the pushing rod 12 is connected to the pushing plate 11;

Among them, the pushing driving mechanism drives the pushing rod 12 to perform a telescopic action, so that the pushing plate 11 pushes the dried sludge product out of the drying chamber 6;

Optionally, the collection member is disposed on the contact end surface of the pushing plate 11 and the sludge, and the pushing plate 11 and the side wall of the drying chamber 6 pass through a multi-layer sealant gasket 10 contact seal;

After being sealed by multiple layers of sealant pads 10, the sludge stored in the drying chamber 6 will not leak out, and the sludge in the drying chamber 6 will be frozen by the freezing device. At the same time, it also reduces the risk of sludge leakage;

When the pushing driving mechanism drives the pushing rod 12 to telescopically move, the pushing plate 11 is driven to move. At this time, the pushing plate 11 pushes out the dried sludge product.

Optionally, the drying chamber 6 is configured as a barrel-shaped structure with one end open, wherein the pushing member is disposed directly opposite the opening, so that the dried sludge product can be removed from the dried chamber. Push out from cavity 6;

Optionally, the freezing device is arranged above the drying chamber 6 that is open at one end, and is buckled on the drying chamber 6 in the working state, and freezes the sludge in the drying chamber 6;

As shown in Figure 8, the refrigeration device includes a refrigeration compressor, a freezing plate 5, a circulation pump 7, a cooling liquid, a vacuum pump 17, a temperature sensor and a lifting member. The refrigeration compressor uses refrigerant to cycle between evaporation and condensation. , thereby absorbing and releasing heat, the freezing plate 5 is used to cover the drying chamber 6 to form a closed space, so that the moisture inside the sludge in the drying chamber 6 will be quickly frozen into Ice, the circulation pump 7 is used to continuously circulate the cooling liquid to maintain a uniform temperature throughout the drying chamber 6 (for applications requiring lower temperatures, liquid nitrogen can be used as the cooling medium; the temperature of liquid nitrogen is very low, (can quickly freeze the moisture in the sludge), the lifting member adjusts the position of the cooling plate so that the cooling plate can cover the opening of the drying chamber 6 to form a proportional cooling space , the vacuum pump 17 creates a vacuum environment in the drying chamber 6;

Among them, the cooling compressor, circulation pump 7 and cooling liquid are arranged on one end surface of the freezing plate 5; the temperature controller is arranged in the drying chamber 6 to maintain the drying chamber 6 at the desired freezing temperature and protected from overcooling or overheating;

A closed loop is formed between the temperature sensor, the refrigeration compressor, the circulation pump 7, the coolant and the central processor, so that the temperature in the drying chamber 6 can be maintained at the required freezing temperature and prevent overcooling or Overheating also promotes the freezing efficiency of sludge;

The lifting member includes a lifting rod 4, a lifting driving mechanism and a height detection component. One end of the lifting rod 4 is drivingly connected to the lifting driving mechanism to form a lifting part, and the other end of the lifting rod 4 is connected to the cooling plate. One side end surface is vertically fixedly connected, and the height detection component detects the lifting height of the lifting rod 4;

Wherein, the lifting part is arranged on the stand 3 and extends toward one side of the drying chamber 6;

The operation process of the refrigeration device is as follows:

S11. Place the sludge in the drying chamber 6, and buckle the freezing plate 5 at the opening of the drying chamber 6 to form a sealed cooling space;

S12. Turn on the compression freezer and ensure that the freezing tray or plate reaches the required low temperature; if liquid nitrogen is used for freezing, spray liquid nitrogen directly onto the sludge or use liquid nitrogen cooling equipment to freeze the sludge;

S13. Continuously monitor the temperature and freezing progress of the sludge until the moisture inside is completely frozen into ice;

S14. After completion of freezing, the sludge can be further processed or utilized;

When the sludge turns into sludge ice cubes, it enters the main drying operation, wherein the main drying operation steps include:

S21. Start the vacuum pump 17 to form a vacuum inside the freezer;

S22. Under vacuum, the ice in the sludge begins to sublimate into water vapor;

S23. Water vapor is captured by the freezing trap to prevent it from flowing into the vacuum pump 17;

Among them, a freezing trap is set at the front end of the vacuum pump 17 to capture evaporated water and prevent water from entering the vacuum pump 17; the so-called freezing trap is, simply put, an ultra-cold container or device; its working principle is very similar to that in a refrigerator Freezing chamber, but the temperature is much lower; when the vacuum pump 17 is working and pumping out the air and water vapor in the freezing chamber, these vapors will pass through the freezing trap; due to the ultra-low temperature of the freezing trap, the water vapor will immediately freeze on it and become Form an ice layer; in this way, the vacuum pump 17 will not absorb moisture that may damage its internal structure;

To use a popular expression: the freezing trap is actually a "super-cold collector"; imagine that when the mist exhaled by a person encounters cold glass, it will condense into water droplets; the freezing trap has a similar function, except that it is colder;

When using the vacuum pump 17 to pump air and want to turn the moisture in the sludge into steam and suck it out, you do not want these vapors to enter and damage the vacuum pump 17; therefore, place an ultra-cooled "collector" (i.e., in front of the vacuum pump 17) Freezing trap); in this way, water vapor will immediately condense and turn into ice when passing through, and will be "collected" without entering the vacuum pump 17;

Then enter the post-drying operation. This stage ensures that the small amount of moisture remaining in the sludge is completely removed;

The post-drying process includes:

S31. The heating device 16 gradually heats up the drying chamber 6. During this process, the vacuum state of the drying chamber 6 is still maintained;

S32. The remaining trace moisture in the frozen sludge block will continue to evaporate;

S33. When the predetermined drying standard is reached (analyzed by the quality inspection analysis unit), stop heating and vacuum;

Optionally, the heating device 16 is provided on the side wall of the drying chamber 6;

The heating device 16 includes a heating rod or a heating plate, which is used to fine-tune the temperature of the freezing chamber;

After completing the above operations, enter the process of restoring normal pressure and encapsulating. At this stage, the drying process ends and the dried sludge is stored;

The process of restoring normal pressure and encapsulating is carried out according to the following steps:

S41. Turn off the vacuum pump 17 and slowly return the freezing chamber to normal pressure;

S42. Open the freezing chamber (transform the freezing plate 5 from the sealing state to the contact sealing and buckling state through the lifting member), and take out the dried sludge;

S43. Send the dried sludge to the subsequent packaging process; in this example, the processes after subsequent packaging and transportation will no longer be described, because the subsequent packaging and transportation of sludge is a process well known to those skilled in the art. Technical means, those skilled in the art can package it, transport it to the address provided by the demand end, or notify the demand end to pick up the goods, etc., so in this embodiment, they will not be described one by one;

Among them, through the cooperation between the heating device 16 and the freezing device, the drying efficiency of the sludge is improved, the drying accuracy of the sludge is also ensured, and the reliability of drying and demoulding is further optimized;

Through the cooperation between the drying unit and the quality inspection and analysis unit, the traditional drying method is changed, the sludge drying efficiency is faster, and different drying needs are taken into account, with good interactive effect and drying effect. It has the advantages of high chemical efficiency and accurate intelligent analysis.

Embodiment 2: This embodiment should be understood as including all the features of any of the aforementioned embodiments, and further improved on the basis thereof. According to Figures 1, 2, 3, 4, 5, 6, and 7. As shown in Figure 8, the sludge treatment and utilization module also includes an angle adjustment unit, which tilts the drying chamber 6 to cooperate with the pushing member to move the dried sewage. The mud is pushed out to ensure that the sludge can be dumped more smoothly;

The angle adjustment unit includes a base frame 15, an angle adjustment member, a support member and a status collector. The base frame 15 is used to support the angle adjustment member. The angle adjustment member adjusts the position of the drying chamber 6. Adjustment, the state collector collects the state of the angle adjustment member, the support member is used to support the drying chamber 6, and the support member is symmetrically arranged on both sides of the drying chamber 6, And it is hinged with the side wall of the drying chamber 6 to form a hinge portion;

As shown in Figure 8, the support member includes a support frame 13 and a fixing hoop 9. The fixing hoop 9 is nested on the outer wall of the drying chamber 6 and provides stable support. The support frame 13 is hingedly connected to the fixing hoop 9 through bolts or screws; at the same time, the support frame 13 is connected to the bottom frame 15 through a connecting rod to maintain stable support for the drying chamber 6;

In addition, the angle adjustment member includes an adjustment rod 14 , a height detection member and a height driving mechanism. One end of the adjustment rod 14 is drivingly connected to the angle adjustment driving mechanism to form an adjustment part. The adjustment part is connected to the chassis 15 The upper end surface of the drying chamber 6 is hinged. When the drying chamber 6 needs to be poured, the height driving mechanism drives the adjusting rod 14 to telescopically move, so that the drying chamber 6 moves along the hinged portion of the supporting member. The axis rotates, and the other end of the adjustment rod 14 is hinged with the bottom wall of the drying chamber 6;

When the height driving mechanism drives the adjusting rod 14 to telescopically move, the drying chamber 6 can rotate along the axis of the hinge, thereby realizing the tilting effect of the drying chamber 6;

Specifically, the adjustment part is provided on the bottom frame 15 and is hingedly connected with the bottom frame 15. When the height driving mechanism drives the adjustment rod 14 to extend, the position of the drying chamber 6 will be adjusted. Make adjustments and cooperate with the pushing member to push out the dried soil so that it can fall into the transportation or packaging process more smoothly;

Through the cooperation between the angle adjustment unit and the drying unit, the angle of the drying chamber 6 can be adjusted to ensure that the dried sludge can be poured smoothly, improve the sludge drying efficiency, and make the entire system intelligent. The advantages of high degree and high drying efficiency.

The contents disclosed above are only preferred and feasible embodiments of the present invention, and do not limit the protection scope of the present invention. Therefore, all equivalent technical changes made by using the contents of the description and drawings of the present invention are included in the protection scope of the present invention. Inside, moreover, elements of it can be updated as technology develops.

Claims (10)

1. A sludge reuse planning system based on smart cities. The sludge reuse planning system includes a server. It is characterized in that the sludge reuse planning system also includes a sludge collection module, a demand assessment module, and an interactive system. module, sludge treatment and utilization module, the server is connected to the sludge collection module, demand assessment module, interaction module, sludge treatment and utilization module respectively; The sludge collection module collects sludge status data of the sewage treatment tank in the sludge treatment plant in real time, and transmits the sludge status data to the demand assessment module. The interactive module is used to collect sludge demand data on the demand side. , the demand assessment module collects the sludge demand data collected by the interactive module, and evaluates the sludge demand data to form an evaluation result, and the sludge treatment and utilization module performs sludge reuse operations based on the evaluation results. , and prompt the managers and demand side; The interactive module includes an interactive unit and an identity verification unit. The identity verification unit verifies the identity of the user. The interactive unit submits sludge demand data for the demand side that passes the identity verification; The demand assessment module obtains the sludge demand data and calculates the demand Q and drying index Drying according to the following formula: ; In the formula, Q _base is the basic demand, and △Q is the change compared with the previous sludge demand, which satisfies: , Q _{current order} is the demand for the current order, Q _{previous order} is the demand determined in the last demand data, F _feedback is the dryness index adjusted based on the previously supplied product quality feedback, P _spec is the dryness in the demand data Level, its value is obtained from demand data, U _purpose is the degree of impact of the use of demand data on drying, and its value is set based on experience by industry experts; The demand assessment module transmits the assessment results to the sludge treatment and utilization module to trigger the sludge treatment and utilization module to reuse the sludge. 2. The sludge reuse planning system based on smart city according to claim 1, characterized in that the sludge treatment and utilization module includes a drying unit and a quality inspection and analysis unit, and the drying unit is responsible for the The sludge is dried, and the quality inspection and analysis unit collects detection data of the sludge products processed by the drying unit, and performs quality inspection based on the detection data; Wherein, the drying unit includes a drying chamber, a drying component and a pushing component. The drying chamber is used to store the sludge, and the drying component dries the sludge in the drying chamber. Chemical operation, the pushing member pushes the dried sludge that has passed the quality inspection to enter the packaging process; Wherein, the pushing member is disposed in the drying chamber. 3. The sludge reuse planning system based on smart city according to claim 2, characterized in that the sludge collection module is arranged in different classification tanks of the sludge treatment plant, and the sludge collection module includes a sludge collection module. Sludge collection unit and data transmission unit, the sludge collection unit collects sludge status data in the classification tank, and the data transmission unit transmits the sludge status data collected by the sludge collection unit to the demand assessment module middle. 4. The sludge reuse planning system based on smart city according to claim 3, characterized in that the quality inspection and analysis unit includes a collection component and an analyzer, and the collection component collects dry sludge in the drying chamber. detection data of the sludge product, and the analyzer analyzes the sludge product according to the detection data; The collection component includes a load sensor, and the load sensor collects real-time detection data of sludge in the drying chamber; The analyzer obtains the detection data collected by the collection component, and calculates the real-time drying index Drying _current according to the following formula: ; In the formula, α is the mass influence coefficient, its value is set by the system according to the actual situation, β is the temperature influence coefficient, its value is set by the system according to the actual situation, Tem is the real-time temperature of the drying process of the drying component, mass _initial is the initial mass of sludge, mass _current is the current mass of sludge; Determine the drying time based on the real-time drying index: ; In the formula, ω is a predetermined time coefficient, and its value is directly determined by calling the time coefficient values corresponding to different drying index values preset in the server's database; If time ≤ 3 hours, use high vacuum sublimation drying method, and at the same time, cooperate with low temperature environment to maintain the ice state; If 3 < time ≤ 8 hours, use a medium vacuum sublimation drying method. Within this time range, gradually increase the temperature of the drying chamber and reduce the vacuum degree of the environment in the drying chamber; If time>8 hours, use low vacuum sublimation drying method and gradually increase the temperature of the drying chamber; Among them, after the sludge is dried, the dried sludge product is transferred to the subsequent packaging process. 5. The sludge reuse planning system based on smart cities according to claim 4, characterized in that the drying component includes a refrigeration device, a vacuum pump, a condenser and a heating device, and the refrigeration device is used to recycle the sludge. The moisture in the sludge is frozen into ice. The vacuum pump creates a vacuum environment in the drying chamber to directly sublimate the ice into steam. The condenser is used to collect the steam sublimated from the sludge. The heating device adjusts the temperature of the sludge according to the set needs. The sludge in the drying chamber is heated. 6. The sludge reuse planning system based on smart city according to claim 5, characterized in that the pushing member includes a pushing plate, a pushing rod and a pushing driving mechanism, and one end of the pushing rod A pushing part is formed in driving connection with the pushing driving mechanism, the pushing part is provided at the bottom wall of the drying chamber, and the other end of the pushing rod is connected to the pushing plate; Wherein, the pushing driving mechanism drives the pushing rod to telescopically move, so that the pushing plate pushes the dried sludge product out of the drying chamber. 7. The sludge reuse planning system based on smart city according to claim 6, characterized in that the collection member is provided on the contact end surface of the pushing plate and the sludge, and the pushing The plate and the side wall of the drying chamber are in contact and sealed by multi-layer sealant gaskets. 8. The sludge reuse planning system based on smart city according to claim 7, characterized in that the drying chamber is configured as a barrel-shaped structure with one end open. 9. The sludge reuse planning system based on smart city according to claim 8, characterized in that the refrigeration device is arranged above the drying chamber with one end open, and is buckled on the drying chamber in the working state. and freeze the sludge in the drying chamber. 10. The sludge reuse planning system based on smart city according to claim 9, characterized in that the heating device is provided on the side wall of the drying chamber.