Sludge drying fresh air adjusting system and method

Abstract

The invention provides a sludge drying fresh air adjusting system and method.According to the sludge drying fresh air adjusting system, particulate matter grading interception is achieved through a three-stage combined structure and three-stage filtering in an air filtering module, the maintenance frequency is reduced through the primary layer washable design, and the blocking risk is monitored and early warned through the intermediate layer pressure difference; and the high-level quick release structure is convenient to replace. The temperature control module integrates a waste heat recovery mode and an electric heating mode, the heat transfer efficiency is enhanced through a nano-coating, temperature uniformity is ensured through partition temperature control, and the refrigeration unit and the heating system are interlocked to avoid energy conflicts. The intelligent control module achieves dynamic adjustment through a multi-parameter sensing network, a three-level early warning mechanism guarantees safe and stable operation of the system, the waste heat priority algorithm maximizes the energy utilization rate, and the response speed of the stepless speed regulation mechanism meets the industrial-level real-time requirement. The system integrally realizes refined energy consumption management, effectively reduces carbon emission in the sludge drying process, and ensures that the air quality meets the industrial hygiene standard.

Description

Technical Field

[0001] The present invention relates to the technical field of waste heat control, and in particular to a sludge drying fresh air conditioning system and method. Background Art

[0002] Current waste heat recovery units in industrial air handling systems generally employ a static control mode, resulting in significant deficiencies in their hot water coil heating subsystems when responding to variable operating conditions. When the waste heat source temperature fluctuates (for example, the cooling water temperature in a steel rolling process fluctuates randomly between 75 and 95°C), if sufficient waste heat is present, the lack of dynamic water flow control forces the excess heat to be discharged through the cooling tower. If insufficient waste heat is present, delayed control response results in substandard fresh air heating. This significantly limits the potential for cascaded utilization of industrial waste heat resources. Summary of the Invention

[0003] In view of this, the present invention provides a sludge drying fresh air conditioning system. One or more embodiments of this specification also relate to a sludge drying fresh air conditioning method to address the technical deficiencies in the prior art.

[0004] According to a first aspect of the present invention, a sludge drying fresh air conditioning system is provided, comprising: The air filtration module consists of a primary filter layer, a secondary filter layer, and a high-level filter layer. The primary filter layer is installed at the entrance of the fresh air duct to intercept large particles, the secondary filter layer is set in the middle of the fresh air duct to capture medium particles, and the high-level filter layer is located at the end of the fresh air duct to remove ultrafine particles. The temperature control module includes a waste heat recovery unit and an auxiliary electric heating unit. The waste heat recovery unit uses the factory waste heat to heat the fresh air through the coil, and the auxiliary electric heating unit starts when the waste heat is insufficient. The intelligent control module includes a sensor network, a central controller and an actuator deployed in the drying chamber. The sensor network collects temperature, humidity, particulate matter concentration and CO2 data and transmits them to the central controller. The central controller adjusts the fan speed and valve opening of the actuator through a dynamic algorithm. The drying chamber is used to dry water-containing sludge.

[0005] In some embodiments, the primary filter layer uses a composite structure of metal mesh and non-woven fabric and is washable and reusable, the intermediate filter layer uses electrostatically charged melt-blown material and is equipped with a differential pressure sensor, and the advanced filter layer is a glass fiber pleated filter element and is connected to the pipeline via a flange quick-release structure; The differential pressure sensor monitors the pressure difference before and after the filter in real time and generates differential pressure data.

[0006] In some embodiments, the coil surface of the waste heat recovery unit is covered with a nano-thermal conductive coating, the auxiliary electric heating unit uses a ceramic heating plate to perform zone temperature control, and the refrigeration unit achieves cooling through a scroll compressor and an evaporator and is interlocked with the heating system; the temperature sensor collects the coil inlet water temperature and the ambient temperature, and the flow sensor and the temperature difference calculation module work together to generate instantaneous heat exchange volume.

[0007] In some embodiments, the central controller has a built-in three-level fault warning mechanism, which triggers warning signals, downgraded operation instructions and emergency shutdown commands in sequence according to the real-time data of the sensor network. The actuators include a stepless speed regulation fan and an electric air valve with a response time of less than 200 milliseconds; the power monitoring module collects the power consumption Pele of the electric heating partition in real time, and the temperature control deviation calculation module processes and generates the deviation between the set temperature and the actual temperature of each area.

[0008] In some embodiments, the dynamic algorithm includes a waste heat priority strategy, and the waste heat utilization rate is determined by the following calculation formula:

[0009] in, is the waste heat utilization rate, is the water temperature at the coil inlet at the i-th moment, which comes from the temperature sensor of the waste heat recovery unit; is the ambient temperature, which comes from the peripheral probes of the sensor network; is the instantaneous heat exchange capacity of the j-th coil, which is calculated from the flow sensor and temperature difference data; is the power consumption of the kth electric heating zone; is the deviation between the set temperature and the actual temperature of the lth temperature control area; n and m are the sampling times of the corresponding parameters, and p and q are the number of partitions of the corresponding parameters.

[0010] In some embodiments, the instantaneous heat exchange capacity is calculated according to the following formula:

[0011] in, is the specific heat capacity of water sampled at the rth time, which comes from the medium physical property database; is the real-time water temperature flowing through the waste heat recovery coil at the rth sampling time, is the coil outlet water temperature at the rth sampling time; is the flow velocity of the tth section, which comes from the pipeline flow meter; is the density of the fluid in segment t; is the vth heat transfer element area, which comes from the coil structure parameters, s represents the number of sampling times for the specific heat capacity of water, u represents the total number of segments for flow rate segment measurement, and w represents the number of heat transfer element areas.

[0012] In some embodiments, an air tightness detection unit is provided between the high-grade filter layer and the pipeline, and the air tightness detection unit includes an annular pressure chamber and a micro-pressure differential sensor, wherein the annular pressure chamber is connected to the compressed air source through an electromagnetic valve, and the micro-pressure differential sensor detects the pressure difference between the inside and outside of the mounting flange and generates a sealing status signal; when the pressure difference between the inside and outside exceeds a preset threshold, the central controller triggers an audible and visual alarm and records the coordinates of the leakage location, and the coordinates are determined by preset positioning tags around the flange.

[0013] According to a second aspect of the present invention, a method for regulating fresh air for sludge drying is provided, which is applied to the system of the aforementioned claim, and the method comprises: intercepting large particles in fresh air through a primary filter layer to generate primary purified air; processing the primary purified air through an intermediate filter layer to generate intermediate purified air, and collecting filtration pressure difference data at the same time; passing the intermediate purified air through a high-level filter layer to generate final purified air; heating the final purified air with a coil of a waste heat recovery unit, and collecting the water temperature and ambient temperature at the coil inlet through a temperature sensor; starting an auxiliary electric heating unit when waste heat is insufficient, and recording the electric heating power consumption; collecting air temperature and humidity, particulate matter concentration and CO2 data in real time through a sensor network; and dynamically adjusting the fan speed and valve opening by a central controller based on pressure difference data, temperature data, power data and air quality data.

[0014] In some embodiments, collecting filtration differential pressure data specifically includes: monitoring the differential pressure in real time using differential pressure sensors at both ends of the intermediate filtration layer; generating a filter replacement signal when the differential pressure exceeds a set threshold. In some embodiments, the central controller's adjustment process includes a three-level response: triggering an alert when sensor data exceeds a first threshold; switching to a degraded operating mode when it exceeds a second threshold; and initiating an emergency shutdown when it exceeds a third threshold.

[0015] At least one embodiment of the present invention uses a three-stage combined structure in the air filtration module to achieve graded interception of particulate matter through three-stage filtration. The washable design of the primary layer reduces maintenance frequency. The pressure difference monitoring of the intermediate layer warns of blockage risks. The quick-release structure of the advanced layer facilitates replacement. The temperature control module integrates waste heat recovery and electric heating modes. The nano-coating enhances heat transfer efficiency. The zoned temperature control ensures temperature uniformity. The refrigeration unit and the heating system are interlocked to avoid energy conflicts. The intelligent control module achieves dynamic adjustment through a multi-parameter sensor network. The three-level warning mechanism ensures safe and stable operation of the system. The waste heat priority algorithm maximizes energy utilization. The stepless speed regulation mechanism responds at an industrial-grade real-time speed. The overall system achieves refined energy consumption management, effectively reducing carbon emissions from the sludge drying process while ensuring that air quality meets industrial hygiene standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a simplified structural diagram of a sludge drying fresh air conditioning system provided by the present invention; Figure 2 This is a flow chart of a sludge drying fresh air regulation method provided by the present invention. DETAILED DESCRIPTION

[0017] The following description sets forth many specific details to facilitate a thorough understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the scope of this specification. Therefore, this specification is not limited to the specific implementations disclosed below.

[0018] The terms used in one or more embodiments of this specification are for the purpose of describing specific embodiments only and are not intended to limit one or more embodiments of this specification. The singular forms of "a" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items. The modifications of "one" and "a plurality" mentioned in this disclosure are illustrative and not restrictive, and those skilled in the art should understand that unless the context clearly indicates otherwise, it should be understood as "one or more".

[0019] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0020] See also Figure 1 , Figure 1 The following is a simplified structural diagram of a sludge drying fresh air conditioning system according to some embodiments of this specification, specifically comprising: The air filtration module consists of a primary filter layer, a secondary filter layer and a high-level filter layer; the primary filter layer is installed at the entrance of the fresh air duct to intercept large particles, the secondary filter layer is set in the middle section of the fresh air duct to capture medium particles, and the high-level filter layer is located at the end of the fresh air duct to remove ultrafine particles.

[0021] The temperature control module includes a waste heat recovery unit and an auxiliary electric heating unit. The waste heat recovery unit uses the factory waste heat to heat the fresh air through the coil, and the auxiliary electric heating unit starts when the waste heat is insufficient.

[0022] The intelligent control module includes a sensor network, a central controller and an actuator deployed in the drying chamber. The sensor network collects temperature, humidity, particulate matter concentration and CO2 data and transmits them to the central controller. The central controller adjusts the fan speed and valve opening of the actuator through a dynamic algorithm. The drying chamber is used to dry water-containing sludge.

[0023] The primary filter layer, which can be a composite structure of metal mesh and non-woven fabric, intercepts large particles such as dust and hair and reduces the load on subsequent filters. The secondary filter layer, which can be a bag filter using electrostatically charged meltblown material, can capture medium-sized particles such as pollen and extend the service life of the advanced filter. The advanced filter layer, which can be a final filter unit composed of a pleated glass fiber filter element, can remove ultrafine particles such as PM2.5 and bacteria to meet cleanliness requirements.

[0024] A waste heat recovery unit can refer to a device that uses waste heat to heat fresh air through a coil structure, improving energy efficiency and reducing operating costs. An auxiliary electric heating unit can refer to a zoned temperature control device composed of ceramic heating plates, which can supplement heat energy to ensure temperature stability when waste heat is insufficient. A coil can refer to a heat exchange component covered with a nano-coating to enhance heat transfer efficiency and reduce heat loss.

[0025] The sensor network can refer to a multi-parameter monitoring system deployed within the drying chamber, which collects real-time data on temperature, humidity, particulate matter concentration, and CO2. The central controller can refer to a processing core with a built-in dynamic algorithm that analyzes sensor data and generates control commands. The actuator can refer to a combination of a stepless speed-regulating fan and electric damper that quickly responds to control commands to adjust air volume and airflow distribution. The dynamic algorithm can refer to control logic optimized based on real-time data, which coordinates the priority of waste heat utilization and electric heating to balance energy consumption and performance.

[0026] The three-stage combined structure of the air filtration module achieves graded interception of particulate matter through three-stage filtration. The washable design of the primary layer reduces maintenance frequency. The pressure differential monitoring of the intermediate layer warns of blockage risks. The quick-release structure of the advanced layer facilitates replacement. The temperature control module integrates waste heat recovery and electric heating. The nano-coating enhances heat transfer efficiency. Zoned temperature control ensures temperature uniformity. The refrigeration unit and heating system are interlocked to avoid energy conflicts. The intelligent control module achieves dynamic adjustment through a multi-parameter sensor network. The three-level early warning mechanism ensures safe and stable operation of the system. The waste heat priority algorithm maximizes energy utilization. The stepless speed regulation mechanism responds quickly enough to meet industrial-grade real-time requirements. The overall system achieves refined energy consumption management, effectively reducing carbon emissions from the sludge drying process while ensuring that air quality meets industrial hygiene standards.

[0027] In some embodiments, the primary filter layer uses a composite structure of metal mesh and non-woven fabric and is washable and reusable, the intermediate filter layer uses electrostatically charged melt-blown material and is equipped with a pressure differential sensor, and the advanced filter layer is a glass fiber pleated filter element and is connected to the pipeline through a flange quick-release structure; the pressure differential sensor monitors the pressure difference before and after the filter in real time and generates pressure differential data.

[0028] The primary filter layer can refer to a primary filter unit composed of a metal mesh and non-woven fabric, which can intercept large particles larger than 5μm, such as dust and hair. The metal mesh can refer to a mesh support frame made of stainless steel or aluminum alloy, which can improve the mechanical strength of the filter material and withstand the impact of airflow. As an example, the pore size of the metal mesh is usually 2-5mm to balance air permeability and interception efficiency. The non-woven fabric can refer to a non-woven filter material made of polyester fiber through a meltblown process, which can efficiently intercept particulate matter and is washable.

[0029] The intermediate filter layer may refer to an intermediate filter unit using electrostatically charged meltblown material, which can capture medium-sized particles of 1-5μm, such as pollen. As an example, the medium-efficiency filter has a filtration efficiency of 75-85% for 1μm particles. Electrostatically charged meltblown material may refer to a polypropylene ultrafine fiber mesh that has been treated with high-voltage polarization, which can absorb particles through the electrostatic effect. The differential pressure sensor may refer to an electronic device that monitors the air pressure difference across the filter to determine the degree of filter clogging. As an example, a replacement alarm is triggered when the pressure difference exceeds 50Pa.

[0030] Advanced filtration refers to a final filter consisting of a pleated glass fiber element that removes ultrafine particles smaller than 0.5 μm. For example, an H13 HEPA filter has a filtration efficiency of 99.97% for particles as small as 0.3 μm.

[0031] Pleated glass fiber filter elements refer to corrugated filter media made from borosilicate glass fiber paper. They increase dust holding capacity by increasing the filter area. For example, a single 610×610mm filter element can expand to cover an area of ​​18 square meters.

[0032] A quick-release flange connection can refer to a standardized pipe connection with a sealing gasket that allows for quick filter element replacement. For example, a filter element can be replaced within 30 seconds after the flange bolts are removed.

[0033] This multi-stage filtration system utilizes a metal mesh composite primary filter layer for high-strength interception and repeatable cleaning. The electrostatically charged intermediate filter layer, combined with differential pressure monitoring, enables precise maintenance and management. The high-efficiency filter element in the high-efficiency filter layer, coupled with a flange quick-release design, ensures high-performance, end-of-line filtration and ease of operation. The overall system achieves highly efficient, graded interception of particulate matter with low maintenance costs in cleanroom environments such as medical and electronics.

[0034] In some embodiments, the coil surface of the waste heat recovery unit is covered with a nano-thermal conductive coating, the auxiliary electric heating unit uses a ceramic heating plate to perform zone temperature control, and the refrigeration unit achieves cooling through a scroll compressor and an evaporator and is interlocked with the heating system; the temperature sensor collects the coil inlet water temperature and the ambient temperature, and the flow sensor and the temperature difference calculation module work together to generate instantaneous heat exchange volume.

[0035] Nano-thermal coatings can refer to surface treatment layers made of nanomaterials such as graphene, which enhance thermal conductivity and withstand high-temperature environments. Ceramic heaters can refer to heating elements made of metal-ceramic composites, enabling fast response and zoned temperature regulation. Zoned temperature control refers to the technology of independently regulating the temperature of different zones, ensuring thermal uniformity and reducing energy waste. Refrigeration units can refer to cooling systems based on a compression cycle, enabling rapid cooling under high-temperature conditions. Scroll compressors can refer to refrigeration equipment using a spiral compression structure, providing stable high-pressure gas and reducing energy consumption. Evaporators can refer to components that achieve cooling through phase change heat absorption, efficiently transferring heat from the system. Interlocks can refer to the linked protection mechanisms of heating and cooling systems to avoid energy conflicts and equipment overload. Temperature sensors can refer to temperature measurement devices such as thermocouples or RTDs, which can monitor temperature changes at key points in real time. Flow sensors can refer to electronic components that detect fluid flow rate and can collaboratively calculate heat exchange. Temperature differential calculation modules can refer to the algorithmic unit that processes temperature and flow data to optimize system energy efficiency management.

[0036] For example, the nanocoating uses a single layer of graphene material, and its thermal conductivity is increased to 13.6W / m·K when the thickness is 0.8nm; the ceramic heating plate is divided into three zones, A / B / C, and the power of each zone is independently adjusted to a limit of 800°C; the scroll compressor achieves a COP of 3.4 at 130°C; and the temperature difference module controls the evaporator outlet temperature with an accuracy of 0.1°C.

[0037] A nano-coating enhances waste heat recovery efficiency, ceramic heating elements provide zoned temperature control to ensure temperature stability, and a scroll compressor and interlocking design enable coordinated cooling and heating management. A multi-sensor collaborative dynamic adjustment mechanism significantly improves energy efficiency, making it suitable for industrial applications requiring precise temperature control, such as electroplating and food processing.

[0038] In some embodiments, the central controller has a built-in three-level fault warning mechanism, which triggers warning signals, downgraded operation instructions and emergency shutdown commands in sequence according to the real-time data of the sensor network. The actuators include a stepless speed regulation fan and an electric air valve with a response time of less than 200 milliseconds; the power monitoring module collects the power consumption Pele of the electric heating partition in real time, and the temperature control deviation calculation module processes and generates the deviation between the set temperature and the actual temperature of each area.

[0039] A three-level fault warning mechanism can refer to a safety protection program with phased responses, enabling risk gradient control through early warning signals, degraded operation, and emergency shutdown. Early warning signals can refer to primary alarms in the form of audible and visual alarms, alerting operators to potential anomalies. Degraded operation instructions can refer to safety control commands that limit equipment performance, mitigating risks while ensuring basic functionality. Emergency shutdown instructions can refer to the highest level of protection, cutting off power to the equipment to prevent major accidents. A stepless speed-regulating fan can refer to ventilation equipment with continuously adjustable speed, enabling precise air volume control. An electric damper can refer to a motor-driven airflow control device that can rapidly change the ventilation cross-sectional area of ​​a duct. A power monitoring module can refer to a detection unit that measures power consumption in real time and calculates the heating energy consumption of each zone. A temperature control deviation calculation module can refer to a data processor that analyzes temperature differences, quantifying control accuracy and generating a basis for adjustment.

[0040] As a specific example: When the temperature sensor in a certain area detects a continuous deviation of 10°C, the central controller triggers the following sequence: yellow warning signal (the buzzer sounds 3 times), downgraded operation (turning off 50% of the heating power of the corresponding zone), and emergency shutdown (cutting off the power supply of the circuit) if it does not recover within 30 seconds.

[0041] The stepless speed-regulating fan automatically adjusts its speed according to the CO2 concentration: at 800ppm, it maintains a base speed of 1200rpm; for every 100ppm increase, it increases by 50rpm to a maximum of 2000rpm.

[0042] The power monitoring module counts the Pele value of each zone every hour: the average value of zone A is 3.2kW; the average value of zone B is 2.8kW; exceeding the limit value (4.0kW) automatically triggers an early warning.

[0043] A three-level early warning system enables progressive fault resolution. Stepless speed regulation and the rapid response of electric dampers ensure the stability of environmental parameters. Dual monitoring of power and temperature deviation provides data support for energy efficiency optimization. The overall system demonstrates exceptional safety and control accuracy in delicate environments such as semiconductor workshops.

[0044] In some embodiments, the dynamic algorithm includes a waste heat priority strategy, and the waste heat utilization rate is determined by the following calculation formula:

[0045] in, is the waste heat utilization rate, is the water temperature at the coil inlet at the i-th moment, which comes from the temperature sensor of the waste heat recovery unit; is the ambient temperature, which comes from the peripheral probes of the sensor network; is the instantaneous heat exchange capacity of the j-th coil, which is calculated from the flow sensor and temperature difference data; is the power consumption of the kth electric heating zone; is the deviation between the set temperature and the actual temperature of the lth temperature control area; n and m are the sampling times of the corresponding parameters, and p and q are the number of partitions of the corresponding parameters.

[0046] A dynamic algorithm can refer to an optimization control program that includes a waste heat priority strategy, which can automatically adjust system operating parameters to achieve efficient energy utilization. A waste heat priority strategy can refer to control logic that prioritizes heat recovery, maximizing waste heat utilization while meeting temperature control requirements. Waste heat utilization rate refers to the ratio of recovered heat to total energy consumption, quantifying the system's energy recycling efficiency. Coil inlet water temperature refers to the temperature of water entering the heat exchange pipe and can be used as a basis for evaluating waste heat recovery effectiveness. Ambient temperature refers to the real-time air temperature of the space where the equipment is located and can be used as a correction parameter for calculating the system's heat load. Instantaneous heat exchange capacity refers to the amount of heat energy transferred per unit time and can reflect the real-time operating efficiency of the heat exchanger. Electric heating zone power consumption refers to the energy consumption data of the auxiliary heating unit and can be used to assess the need for additional electrical energy. Temperature control zone deviation refers to the temperature difference between the set value and the measured value and can be used as a basis for adjusting the control algorithm.

[0047] In some embodiments, the instantaneous heat exchange capacity is calculated according to the following formula:

[0048] in, is the specific heat capacity of water sampled at the rth time, which comes from the medium physical property database; is the real-time water temperature flowing through the waste heat recovery coil at the rth sampling time, is the coil outlet water temperature at the rth sampling time; is the flow velocity of the tth section, which comes from the pipeline flow meter; is the density of the fluid in segment t; is the vth heat transfer element area, which comes from the coil structure parameters, s represents the number of sampling times for the specific heat capacity of water, u represents the total number of segments for flow rate segment measurement, and w represents the number of heat transfer element areas.

[0049] The specific heat capacity of water refers to the amount of heat required to raise the temperature of a unit mass of water by a unit, and can be used to accurately calculate the amount of heat carried by a fluid. The water temperature at the coil outlet refers to the temperature of the fluid after heat exchange, and can be used to assess the efficiency of the heat exchanger. The flow rate refers to the speed of the fluid within the pipe, and can influence the heat exchange rate and pressure drop. The fluid density refers to the mass of the medium per unit volume, and can be used in flow and heat transfer calculations. The heat transfer element area refers to the local heat transfer surface area of ​​the coil, and can determine the local heat transfer efficiency.

[0050] In some embodiments, an air tightness detection unit is provided between the high-grade filter layer and the pipeline, and the air tightness detection unit includes an annular pressure chamber and a micro-pressure differential sensor, wherein the annular pressure chamber is connected to the compressed air source through an electromagnetic valve, and the micro-pressure differential sensor detects the pressure difference between the inside and outside of the mounting flange and generates a sealing status signal; when the pressure difference between the inside and outside exceeds a preset threshold, the central controller triggers an audible and visual alarm and records the coordinates of the leakage location, and the coordinates are determined by preset positioning tags around the flange.

[0051] The airtightness testing unit can refer to a sealing performance monitoring component that can determine system leakage risk through pressure testing. An annular pressure chamber can refer to a sealed test space surrounding a pipeline, creating a uniform pressure field for seal testing. A micro differential pressure sensor can refer to a high-precision differential pressure measuring device that can detect minute pressure changes and determine seal failure. A solenoid valve can refer to an actuator that electrically controls the flow of compressed air, precisely controlling the injection and shutoff of compressed air. A compressed air source can refer to a power device that supplies high-pressure gas, providing a stable air source for seal testing. A mounting flange can refer to a disc-shaped fixing at the end of a pipeline connection that serves as a reference interface for seal testing. A seal status signal can refer to an electronic signal indicating airtightness and can trigger system protection mechanisms. An audible and visual alarm can refer to a combination of a buzzer and a warning light, providing a visual indication of a leak. Leak location coordinates can refer to spatial location data based on a location tag, quickly directing repairs. A location tag can refer to a physical marker with an identification code that provides a spatial reference for the leak point.

[0052] As an example: The air tightness detection process may include: the solenoid valve is opened to inject 0.5MPa compressed air into the annular cavity, the micro-pressure differential sensor continuously monitors (range ±500Pa), and when the pressure difference exceeds 50Pa, an alarm is triggered and the coordinates of area B3 are recorded.

[0053] The positioning system's operational process can include: 8 RFID tags are evenly spaced around the flange, and the central controller determines the nearest tag based on signal strength. The leak coordinates are displayed as "X12-Y07-Z axis flange."

[0054] The annular pressure chamber enables seamless seal detection, while micro-differential pressure sensing technology enhances leak detection sensitivity. The intelligent positioning system significantly reduces troubleshooting time and is particularly suitable for pipeline systems with stringent cleanliness requirements, such as those in biopharmaceuticals.

[0055] Corresponding to the above system embodiment, this specification also provides an embodiment of a sludge drying fresh air regulation method. Figure 2 The flowchart of a sludge drying fresh air regulation method provided in some embodiments of this specification is shown. Figure 2 As shown, the specific steps include: Step 201: intercepting large particles in fresh air through a primary filter layer to generate primary purified air; Step 202: Processing the primary purified air through the intermediate filter layer to generate intermediate purified air, while collecting filter pressure difference data; Step 203, passing the intermediate purified air through the advanced filter layer to generate final purified air; Step 204: Using the coil of the waste heat recovery unit to heat the final purified air, and using a temperature sensor to collect the water temperature at the coil inlet and the ambient temperature; Step 205 , starting the auxiliary electric heating unit when the residual heat is insufficient, and recording the electric heating power consumption; Step 206: collecting air temperature and humidity, particulate matter concentration, and CO2 data in real time through a sensor network; In step 207 , the central controller dynamically adjusts the fan speed and valve opening based on the pressure difference data, temperature data, power data, and air quality data.

[0056] In some embodiments, collecting filtration differential pressure data specifically includes: monitoring the differential pressure in real time using differential pressure sensors at both ends of the intermediate filtration layer; generating a filter replacement signal when the differential pressure exceeds a set threshold. In some embodiments, the central controller's adjustment process includes a three-level response: triggering an alert when sensor data exceeds a first threshold; switching to a degraded operating mode when it exceeds a second threshold; and initiating an emergency shutdown when it exceeds a third threshold.

[0057] The above is a schematic diagram of a sludge drying fresh air conditioning method according to this embodiment. It should be noted that the technical solution of this sludge drying fresh air conditioning method and the technical solution of the sludge drying fresh air conditioning system described above are based on the same concept. For details not described in detail in the technical solution of the sludge drying fresh air conditioning method, please refer to the description of the technical solution of the sludge drying fresh air conditioning system described above.

[0058] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0059] The preferred embodiments disclosed above are intended only to help illustrate this specification. The optional embodiments do not exhaustively describe all details, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of the present invention. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize this specification. This specification is limited only by the claims and their full scope and equivalents.

Claims

1. A sludge drying fresh air conditioning system, characterized in that: It includes an air filtration module, a temperature control module and an intelligent control module which are sequentially connected through pipelines; The air filtration module consists of a primary filter layer, a secondary filter layer, and a high-level filter layer; the primary filter layer is installed at the entrance of the fresh air duct to intercept large particles, the secondary filter layer is set in the middle section of the fresh air duct to capture medium particles, and the high-level filter layer is located at the end of the fresh air duct to remove ultrafine particles; The temperature control module includes a waste heat recovery unit and an auxiliary electric heating unit. The waste heat recovery unit uses the factory waste heat to heat the fresh air through a coil. The auxiliary electric heating unit starts when the waste heat is insufficient. The intelligent control module includes a sensor network, a central controller and an actuator deployed in the drying chamber. The sensor network collects temperature, humidity, particulate matter concentration and CO2 data and transmits them to the central controller. The central controller adjusts the fan speed and valve opening of the actuator through a dynamic algorithm. The drying chamber is used to dry water-containing sludge.

2. The system according to claim 1, wherein: The primary filter layer adopts a composite structure of metal mesh and non-woven fabric and is washable and reusable. The intermediate filter layer uses electrostatic electret melt-blown material and is equipped with a pressure differential sensor. The advanced filter layer is a glass fiber pleated filter element and is connected to the pipeline through a flange quick-release structure. The differential pressure sensor monitors the differential pressure before and after the filter in real time and generates differential pressure data.

3. The system according to claim 1, wherein: The coil surface of the waste heat recovery unit is covered with a nano-thermal conductive coating, the auxiliary electric heating unit uses a ceramic heating plate to perform zone temperature control, and the refrigeration unit achieves cooling through a scroll compressor and an evaporator and is interlocked with the heating system; the temperature sensor collects the water temperature at the coil inlet and the ambient temperature, and the flow sensor and the temperature difference calculation module work together to generate the instantaneous heat exchange amount.

4. The system according to claim 1, wherein: The central controller has a built-in three-level fault warning mechanism, which triggers warning signals, downgraded operation instructions and emergency shutdown commands in sequence according to the real-time data of the sensor network. The actuator includes a stepless speed regulation fan and an electric air valve with a response time of less than 200 milliseconds; the power monitoring module collects the power consumption Pele of the electric heating partition in real time, and the temperature control deviation calculation module processes and generates the deviation between the set temperature and the actual temperature of each area.

5. The system according to claim 1, wherein: The dynamic algorithm includes a waste heat priority strategy, and determines the waste heat utilization rate through the following calculation formula: in, is the waste heat utilization rate, is the water temperature at the coil inlet at the i-th moment, which comes from the temperature sensor of the waste heat recovery unit; is the ambient temperature, which comes from the peripheral probes of the sensor network; is the instantaneous heat exchange capacity of the j-th coil, which is calculated from the flow sensor and temperature difference data; is the power consumption of the kth electric heating zone; is the deviation between the set temperature and the actual temperature of the lth temperature control area; n and m are the sampling times of the corresponding parameters, and p and q are the number of partitions of the corresponding parameters.

6. The system according to claim 5, characterized in that The instantaneous heat exchange capacity is calculated according to the following formula: in, is the specific heat capacity of water sampled at the rth time, which comes from the medium physical property database; is the real-time water temperature flowing through the waste heat recovery coil at the rth sampling time, is the coil outlet water temperature at the rth sampling time; is the flow velocity of the tth section, which comes from the pipeline flow meter; is the density of the fluid in segment t; is the vth heat transfer element area, which comes from the coil structure parameters, s represents the number of sampling times for the specific heat capacity of water, u represents the total number of segments for flow rate segment measurement, and w represents the number of heat transfer element areas.

7. The system according to claim 1, wherein: An airtightness detection unit is provided between the high-grade filter layer and the pipeline, and the airtightness detection unit comprises an annular pressure chamber and a micro-pressure differential sensor, wherein: The annular pressure chamber is connected to a compressed air source via a solenoid valve, and the micro-pressure differential sensor detects the pressure difference between the inside and outside of the mounting flange and generates a sealing status signal; When the pressure difference between the inside and outside exceeds a preset threshold, the central controller triggers an audible and visual alarm and records the coordinates of the leakage location, which are determined by the positioning tags preset around the flange.

8. An industrial air treatment method, characterized in that: The method is applied to the system according to any one of claims 1 to 7, and the method comprises: The primary filter layer intercepts large particles in the fresh air to generate primary purified air; Processing the primary purified air through the intermediate filter layer to generate intermediate purified air, while collecting filter pressure difference data; Passing the intermediate purified air through a high-level filter layer to generate final purified air; The final purified air is heated by using the coil of the waste heat recovery unit, and the water temperature at the coil inlet and the ambient temperature are collected by a temperature sensor; When the residual heat is insufficient, the auxiliary electric heating unit is started and the electric heating power consumption is recorded; Real-time collection of air temperature, humidity, particulate matter concentration, and CO2 data through a sensor network; The central controller dynamically adjusts the fan speed and valve opening based on the pressure difference data, temperature data, power data and air quality data.

9. The industrial air treatment method according to claim 8, characterized in that: The collecting and filtering pressure difference data specifically includes: The pressure difference value is monitored in real time through the pressure difference sensors at both ends of the intermediate filter layer, and a filter replacement signal is generated when the pressure difference exceeds the set threshold.

10. The industrial air treatment method according to claim 8, characterized in that: The regulation process of the central controller includes three levels of response: When the sensor data exceeds the first threshold, an early warning is triggered; Switching to a degraded operating mode when a second threshold is exceeded; An emergency stop is performed when the third threshold is exceeded.

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