Sludge solidification stirrer

Abstract

The invention provides a sludge curing stirrer, which belongs to the technical field of stirring and mixing, and comprises a stirring cylinder, a driving device, a stirring device, a feeding device, a discharging device, a curing agent adding device, a cleaning device, a dust removal device and a control device, the stirring barrel is cylindrical and is vertically arranged, a feeding hole is formed in the top of the stirring barrel, and a discharging hole is formed in the bottom of the stirring barrel; the driving device comprises a motor and a speed reducer; the motor is in transmission connection with the stirring device through the speed reducer; the stirring device comprises a main shaft, a plurality of stirring arms and a plurality of stirring blades, the main shaft is vertically arranged in the stirring barrel, the plurality of stirring arms are uniformly distributed along the circumferential direction of the main shaft and are fixedly connected with the main shaft, and the plurality of stirring blades are respectively fixed on the stirring arms; the feeding device is arranged at the top of the stirring barrel and comprises a feeding hopper, a feeding gate and a feeding conveying belt, the feeding hopper is communicated with the feeding port, and the feeding gate is arranged between the feeding hopper and the feeding port.

Description

Technical Field

[0001] The invention belongs to the technical field of stirring and mixing, and in particular relates to a sludge solidification mixer. Background Art

[0002] Sludge solidification treatment is an indispensable part of urban sewage treatment plants. It is a necessary process for urban sewage treatment to reduce the sludge moisture content and increase the sludge solid content through physical, chemical or biological methods, so as to achieve the purpose of reduction, stabilization and harmlessness. At present, sludge solidification treatment mainly includes mechanical dehydration, chemical stabilization, biological drying and other methods. Among them, chemical solidification is a widely used method. By adding solidifying agents such as lime, cement, fly ash, etc. to the sludge, the water in the sludge is adsorbed and combined by the solidifying agent, thereby greatly reducing the sludge moisture content, while increasing the compressive strength of the sludge to achieve a stabilization effect.

[0003] The existing chemical solidification technology mainly adopts a single-stage stirring process, that is, the sludge and the solidifying agent are first added to the stirring device for mixing and stirring to form the solidified sludge, and then it is transported to the next process. There are some problems with this process: first, the mixing effect of the sludge and the solidifying agent depends to a large extent on the stirring effect. If the stirring is not sufficient, the solidification effect will be unsatisfactory, and free water will still exist in the solidified sludge; second, in the single-stage stirring process, a large amount of stirring power consumption will cause energy consumption problems, which is not conducive to the energy saving and environmental protection of the process; third, the solidified sludge is usually high in viscosity, difficult to discharge, and very easy to be blocked in the pipeline or conveying equipment, which increases the difficulty of subsequent treatment. Summary of the invention

[0004] The sludge solidification mixer provided by the invention can solve the problem of insufficient stirring during sludge solidification.

[0005] The present invention is achieved in that:

[0006] The present invention provides a sludge solidification mixer, which includes: a mixing drum, a driving device, a stirring device, a feeding device, a discharging device, a curing agent adding device, a cleaning device, a dust removal device and a control device; the mixing drum is cylindrical and vertically arranged, and a feeding port is provided at the top of the mixing drum and a discharging port is provided at the bottom; the driving device includes a motor and a reducer, and the motor is connected to the mixing device through the reducer; the mixing device includes a main shaft, a plurality of stirring arms and a plurality of stirring blades, the main shaft is vertically arranged in the mixing drum, the plurality of stirring arms are evenly distributed along the circumference of the main shaft and are fixedly connected to the main shaft, and the plurality of stirring blades are respectively fixed on the stirring arms; the feeding device is arranged at the top of the mixing drum, and includes a feeding hopper, a feeding gate and a feeding conveyor belt, the feeding hopper is connected to the feeding port, the feeding gate is arranged between the feeding hopper and the feeding port, and the feeding conveyor belt is inclined and extends to the top of the feeding hopper; the discharging device is arranged at the bottom of the mixing drum The invention discloses a mixing drum comprising a mixing device, a mixing drum and a mixing drum having a plurality of nozzles. The mixing drum comprises ...

[0007] The technical effects of a sludge solidification mixer provided by the present invention are as follows: The sludge solidification mixer proposed by the present invention has made significant improvements on the basis of the existing technology and has the following outstanding technical advantages:

[0008] 1. Optimize the stirring structure and improve the mixing efficiency. The stirring device of the present invention adopts a design of multiple groups of stirring arms and stirring blades, which can not only fully break up the sludge clumps, but also enable the curing agent and the sludge to fully contact and mix. At the same time, the arc structure and circumferential distribution of the stirring blades can produce good convection and turbulence, further enhancing the mixing effect of the sludge and the curing agent. The optimization of the structure of this stirring device ensures a highly uniform dispersion of the sludge and the curing agent during the curing process, thereby significantly improving the curing effect and reducing the presence of free water.

[0009] 2. Adaptive adjustment of stirring power. The present invention provides a stirring power adaptive adjustment module in the control system, which can monitor the changes in sludge properties in real time, such as viscosity, moisture content and temperature, and dynamically adjust the speed of the stirring motor according to these real-time data, so as to keep the stirring power within the optimal range. This adaptive adjustment mechanism can not only ensure that the stirring process is always in the best state and improve the curing efficiency, but also greatly reduce energy consumption and significantly improve energy utilization efficiency.

[0010] 3. Optimize the discharge design to avoid clogging problems. The present invention adopts a funnel-shaped discharge hopper and a scraper conveyor structure in the discharge device, which can effectively prevent the clogging of the solidified sludge and achieve continuous and stable discharge, greatly improving the reliability of the entire solidification process. In addition, the hydraulically driven gate valve and anti-stick coating design of the discharge device further reduce the adhesion problem of sludge during the discharge process.

[0011] The present invention proposes a new type of sludge solidification mixer, which achieves efficient mixing of sludge and solidifying agent by optimizing the stirring structure and process control, and adopts intelligent control means to optimize the stirring power and greatly reduce energy consumption; in addition, a special discharging device is also provided to effectively avoid sludge clogging problems and improve the stability and reliability of the entire solidification process.

[0012] In summary, the sludge solidification mixer proposed in the present invention solves the problems of low mixing efficiency, high energy consumption, and easy clogging existing in the prior art by optimizing the stirring structure, realizing adaptive adjustment of stirring power, and innovative design of the discharging device, thereby significantly improving the performance and reliability of sludge solidification treatment and having broad application prospects.

[0013] On the basis of the above technical solution, the sludge solidification mixer of the present invention can also be improved as follows:

[0014] Among them, an observation window is provided on the wall of the mixing drum, and the observation window is made of transparent wear-resistant material; a heating device is provided on the outer wall of the mixing drum, and the heating device includes an electric heating wire and an insulation layer, the electric heating wire is wound on the outer wall of the mixing drum, and the insulation layer covers the outside of the electric heating wire; the bottom of the mixing drum is a conical structure, and the top angle of the conical structure is 30 degrees to 60 degrees.

[0015] Furthermore, a plurality of groups of stirring arms are provided on the main shaft of the stirring device, and each group of stirring arms includes 2 to 4 stirring arms evenly distributed along the circumference of the main shaft; the installation angles of two adjacent groups of stirring arms on the main shaft are staggered; the stirring blade is an arc-shaped plate structure, the curvature of the stirring blade matches the curvature of the inner wall of the stirring barrel, and the angle between the stirring blade and the stirring arm is 30 degrees to 60 degrees; a plurality of through holes are provided on the surface of the stirring blade, and the through holes are distributed in a plum blossom shape.

[0016] Furthermore, the feed hopper of the feeding device is a funnel-shaped structure, and the upper cross-sectional area of ​​the feed hopper is larger than the lower cross-sectional area; the feeding gate is an electric gate, and the feeding gate is electrically connected to the control device; the feeding conveyor belt is a belt conveyor, and the belt surface of the belt conveyor is provided with anti-slip patterns, and baffles are provided on both sides of the belt conveyor.

[0017] Furthermore, the discharging gate of the discharging device is a hydraulically driven gate valve, which is electrically connected to the control device; the discharging hopper is a funnel-shaped structure, and the inner wall of the discharging hopper is provided with an anti-stick coating; the discharging conveyor belt is a scraper conveyor, and the conveying trough of the scraper conveyor is a U-shaped structure, and a rubber sealing strip is provided between the scraper and the inner wall of the conveying trough.

[0018] Furthermore, the curing agent storage tank of the curing agent adding device is a cylindrical structure, with a feed port and an air vent on the top and a discharge port on the bottom; the metering pump is a screw pump, the inlet of the screw pump is connected to the discharge port of the curing agent storage tank, and the outlet is connected to the injection pipe; the injection pipe is an annular pipe, the annular pipe is arranged circumferentially along the inner wall of the mixing drum, and the nozzles are evenly distributed circumferentially along the annular pipe.

[0019] Furthermore, the cleaning water tank of the cleaning device is a square structure, with a water inlet and an overflow port on the top of the cleaning water tank and a drain port on the bottom; the high-pressure water pump is a plunger pump, the inlet of the plunger pump is connected to the drain port of the cleaning water tank, and the outlet is connected to the cleaning nozzle; the cleaning nozzle is a fan-shaped nozzle, the fan-shaped nozzles are evenly distributed along the circumference of the inner wall of the mixing drum, and the spray angle of the nozzle is 60 to 120 degrees.

[0020] Furthermore, the dust collecting hood of the dust removal device is an umbrella-shaped structure, and the edge of the dust collecting hood is sealed and connected to the top of the mixing drum; the dust removal pipe is a bellows, one end of the bellows is connected to the dust collecting hood, and the other end is connected to the bag-type dust collector; the bag-type dust collector includes a box body, a bag, a vibrating device and a fan, and a plurality of bags are arranged in the box body, the upper part of the bag is connected to the top of the box body, and the lower part is connected to the ash hopper, the vibrating device is arranged on the top of the box body, and the fan is arranged on the side wall of the box body.

[0021] Furthermore, the control device includes a control cabinet, a touch screen and multiple sensors; a programmable logic controller and a frequency converter are arranged in the control cabinet, and the touch screen is arranged on the surface of the control cabinet; the sensors include a temperature sensor, a humidity sensor, a pressure sensor and a position sensor, the temperature sensor and the humidity sensor are arranged on the inner wall of the mixing drum, the pressure sensor is arranged at the bottom of the mixing drum, and the position sensor is respectively arranged at the feed gate and the discharge gate; the control device displays various parameters through the touch screen, and automatically adjusts the working status of the driving device, the stirring device, the feeding device, the discharging device, the curing agent adding device, the cleaning device and the dust removal device according to the data fed back by the sensor.

[0022] Furthermore, the programmable logic controller is provided with a stirring power adaptive adjustment module, and a stirring sensor group arranged in the stirring drum, the stirring sensor group includes a sludge viscosity sensor, a sludge moisture content sensor and a sludge temperature sensor; the stirring power adaptive adjustment module considers the stirring power fluctuation caused by the change of different sludge properties, and adjusts the stirring power in real time; the stirring power adaptive adjustment module is used to perform the following steps:

[0023] S10, obtaining an initial stirring power value, and setting the initial stirring power value as the current stirring power;

[0024] S20, collecting real-time data of the sensor group, including sludge viscosity data, sludge moisture content data and sludge temperature data;

[0025] S30, calculating a theoretical stirring power value according to the real-time data using a preset sludge characteristic model;

[0026] S40, comparing the current stirring power with the theoretical stirring power value, and calculating a power deviation value;

[0027] S50, determining whether the power deviation value exceeds a preset threshold value, if so, proceeding to step S60, if not, returning to step S20;

[0028] S60, calculating the stirring power adjustment amount using a fuzzy control algorithm according to the magnitude and positive and negative sign of the power deviation value;

[0029] S70, adding the current stirring power to the stirring power adjustment amount to obtain a new stirring power value;

[0030] S80, outputting the new stirring power value to the frequency converter to adjust the speed of the stirring motor;

[0031] S90, updating the current stirring power to the new stirring power value, returning to step S20, and cyclically executing the stirring power adaptive adjustment.

[0032] Compared with the prior art, the beneficial effects of the sludge solidification mixer provided by the present invention are as follows: the sludge solidification mixer proposed by the present invention has made significant improvements on the basis of the prior art and has the following outstanding technical advantages:

[0033] 1. Optimize the stirring structure and improve the mixing efficiency. The stirring device of the present invention adopts a design of multiple groups of stirring arms and stirring blades, which can not only fully break up the sludge clumps, but also enable the curing agent and the sludge to fully contact and mix. At the same time, the arc structure and circumferential distribution of the stirring blades can produce good convection and turbulence, further enhancing the mixing effect of the sludge and the curing agent. The optimization of the structure of this stirring device ensures a highly uniform dispersion of the sludge and the curing agent during the curing process, thereby significantly improving the curing effect and reducing the presence of free water.

[0034] 2. Adaptive adjustment of stirring power. The present invention provides a stirring power adaptive adjustment module in the control system, which can monitor the changes in sludge properties in real time, such as viscosity, moisture content and temperature, and dynamically adjust the speed of the stirring motor according to these real-time data, so as to keep the stirring power within the optimal range. This adaptive adjustment mechanism can not only ensure that the stirring process is always in the best state and improve the curing efficiency, but also greatly reduce energy consumption and significantly improve energy utilization efficiency.

[0035] 3. Optimize the discharge design to avoid clogging problems. The present invention adopts a funnel-shaped discharge hopper and a scraper conveyor structure in the discharge device, which can effectively prevent the clogging of the solidified sludge and achieve continuous and stable discharge, greatly improving the reliability of the entire solidification process. In addition, the hydraulically driven gate valve and anti-stick coating design of the discharge device further reduce the adhesion problem of sludge during the discharge process.

[0036] In summary, the sludge solidification mixer proposed in the present invention solves the problems of low mixing efficiency, high energy consumption, and easy clogging existing in the prior art by optimizing the stirring structure, realizing adaptive adjustment of stirring power, and innovative design of the discharging device, thereby significantly improving the performance and reliability of sludge solidification treatment and having broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0038] Figure 1 It is a structural schematic diagram of a sludge solidification mixer;

[0039] Figure 2 It is a schematic diagram of the internal structure of a mixing barrel of a sludge solidification mixer;

[0040] Figure 3 It is the execution flow chart of the stirring power adaptive adjustment module;

[0041] Figure 4 is the graph of the change of sludge property parameters over time;

[0042] Figure 5 This is a comparison chart between theoretical power and actual power;

[0043] Figure 6 is the graph of stirring power deviation change;

[0044] Figure 7 It is a statistical diagram of power deviation distribution;

[0045] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0046] 10. Mixing barrel; 11. Driving device; 111. Motor; 112. Reducer; 12. Mixing device; 13. Feeding device; 131. Feeding hopper; 132. Feeding gate; 133. Feeding conveyor belt; 14. Discharging device; 141. Discharging gate; 142. Discharging hopper; 143. Discharging conveyor belt; 15. Curing agent adding device; 151. Curing agent storage tank; 152. Measuring pump; 153. Injection pipe; 16. Cleaning device; 161. Cleaning water tank; 162. High-pressure water pump; 163. Cleaning nozzle; 17. Dust removal device; 171. Dust hood; 172. Dust removal pipeline; 173. Bag dust collector. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0048] like Figure 1-2The figure is a schematic diagram of the structure of a sludge solidification mixer provided by the present invention. In this structure, it includes: a mixing barrel 10, a driving device 11, a stirring device 12, a feeding device 13, a discharging device 14, a curing agent adding device 15, a cleaning device 16, a dust removal device 17 and a control device; the mixing barrel is cylindrical and vertically arranged, and the top of the mixing barrel is provided with a feeding port, and the bottom is provided with a discharging port; the driving device includes a motor 111 and a reducer 112, and the motor is connected to the stirring device through the reducer. The stirring device includes a main shaft, a plurality of stirring arms and a plurality of stirring blades. The main shaft is vertically arranged in the stirring drum. The plurality of stirring arms are evenly distributed along the circumference of the main shaft and are fixedly connected to the main shaft. The plurality of stirring blades are respectively fixed on the stirring arms. The feeding device is arranged on the top of the stirring drum, including a feeding hopper 131, a feeding gate 132 and a feeding conveyor belt 133. The feeding hopper is connected to the feeding port. The feeding gate is arranged between the feeding hopper and the feeding port. The feeding conveyor belt is inclined and extends to the top of the feeding hopper. The discharging device is arranged on the stirring drum. The bottom of the mixing drum includes a discharge gate 141, a discharge hopper 142 and a discharge conveyor belt 143. The discharge gate is arranged at the discharge port, the discharge hopper is located below the discharge gate, and the discharge conveyor belt is arranged horizontally below the discharge hopper. The curing agent adding device includes a curing agent storage tank 151, a metering pump 152 and an injection pipe 153. The curing agent storage tank is connected to the metering pump through a pipeline, and the metering pump is connected to the mixing drum through the injection pipe. The injection pipe extends to the inside of the mixing drum and is provided with multiple nozzles. The cleaning device includes a cleaning water tank 16 1. A high-pressure water pump 162 and a cleaning nozzle 163. The cleaning water tank is connected to the high-pressure water pump through a pipeline. The high-pressure water pump is connected to the cleaning nozzle through a pipeline. The cleaning nozzle is arranged on the inner wall of the mixing drum. The dust removal device includes a dust hood 171, a dust removal pipeline 172 and a bag dust collector 173. The dust hood is arranged on the top of the mixing drum and is connected to the bag dust collector through the dust removal pipeline. The control device is electrically connected to the driving device, the stirring device, the feeding device, the discharging device, the curing agent adding device, the cleaning device and the dust removal device.

[0049] Among them, in the above technical scheme, an observation window is provided on the wall of the mixing drum, and the observation window is made of transparent wear-resistant material; a heating device is provided on the outer wall of the mixing drum, and the heating device includes an electric heating wire and a thermal insulation layer, the electric heating wire is wound on the outer wall of the mixing drum, and the thermal insulation layer covers the outside of the electric heating wire; the bottom of the mixing drum is a conical structure, and the top angle of the conical structure is 30 degrees to 60 degrees.

[0050] Furthermore, in the above technical scheme, a plurality of groups of stirring arms are provided on the main shaft of the stirring device, and each group of stirring arms includes 2 to 4 stirring arms evenly distributed along the circumference of the main shaft; the installation angles of two adjacent groups of stirring arms on the main shaft are staggered; the stirring blade is an arc-shaped plate structure, the curvature of the stirring blade matches the curvature of the inner wall of the stirring barrel, and the angle between the stirring blade and the stirring arm is 30 degrees to 60 degrees; a plurality of through holes are provided on the surface of the stirring blade, and the through holes are distributed in a plum blossom shape.

[0051] Furthermore, in the above technical scheme, the feed hopper of the feeding device is a funnel-shaped structure, and the upper cross-sectional area of ​​the feed hopper is larger than the lower cross-sectional area; the feed gate is an electric gate, and the feed gate is electrically connected to the control device; the feed conveyor belt is a belt conveyor, and the belt surface of the belt conveyor is provided with anti-slip texture, and baffles are provided on both sides of the belt conveyor.

[0052] Furthermore, in the above technical scheme, the discharge gate of the discharge device is a hydraulically driven gate valve, which is electrically connected to the control device; the discharge hopper is a funnel-shaped structure, and the inner wall of the discharge hopper is provided with an anti-stick coating; the discharge conveyor belt is a scraper conveyor, and the conveying trough of the scraper conveyor is a U-shaped structure, and a rubber sealing strip is provided between the scraper and the inner wall of the conveying trough.

[0053] Furthermore, in the above technical solution, the curing agent storage tank of the curing agent adding device is a cylindrical structure, a feed port and an air vent are provided on the top of the curing agent storage tank, and a discharge port is provided on the bottom; the metering pump is a screw pump, the inlet of the screw pump is connected to the discharge port of the curing agent storage tank, and the outlet is connected to the injection pipe; the injection pipe is an annular pipe, the annular pipe is arranged circumferentially along the inner wall of the mixing drum, and the nozzles are evenly distributed circumferentially along the annular pipe.

[0054] Furthermore, in the above technical scheme, the cleaning water tank of the cleaning device is a square structure, with a water inlet and an overflow port on the top of the cleaning water tank and a drain port on the bottom; the high-pressure water pump is a plunger pump, the inlet of the plunger pump is connected to the drain port of the cleaning water tank, and the outlet is connected to the cleaning nozzle; the cleaning nozzle is a fan-shaped nozzle, the fan-shaped nozzles are evenly distributed along the circumference of the inner wall of the mixing drum, and the spray angle of the nozzle is 60 to 120 degrees.

[0055] Furthermore, in the above technical solution, the dust hood of the dust removal device is an umbrella-shaped structure, and the edge of the dust hood is sealed and connected to the top of the mixing drum; the dust removal pipe is a bellows, one end of the bellows is connected to the dust hood, and the other end is connected to the bag-type dust collector; the bag-type dust collector includes a box body, a bag, a vibrating device and a fan, and a plurality of bags are arranged in the box body, the upper part of the bag is connected to the top of the box body, and the lower part is connected to the ash hopper, the vibrating device is arranged on the top of the box body, and the fan is arranged on the side wall of the box body.

[0056] Furthermore, in the above technical solution, the control device includes a control cabinet, a touch screen and multiple sensors; a programmable logic controller and a frequency converter are arranged in the control cabinet, and the touch screen is arranged on the surface of the control cabinet; the sensors include temperature sensors, humidity sensors, pressure sensors and position sensors, the temperature sensor and humidity sensor are arranged on the inner wall of the mixing drum, the pressure sensor is arranged at the bottom of the mixing drum, and the position sensor is respectively arranged at the feed gate and the discharge gate; the control device displays various parameters through the touch screen, and automatically adjusts the working status of the driving device, the stirring device, the feeding device, the discharging device, the curing agent adding device, the cleaning device and the dust removal device according to the data fed back by the sensor.

[0057] like Figure 3 As shown, in the above technical solution, a stirring power adaptive adjustment module is provided in the programmable logic controller, and a stirring sensor group is provided in the stirring drum, the stirring sensor group includes a sludge viscosity sensor, a sludge moisture content sensor and a sludge temperature sensor; the stirring power adaptive adjustment module considers the stirring power fluctuation caused by the change of different sludge properties, and adjusts the stirring power in real time; the stirring power adaptive adjustment module is used to perform the following steps:

[0058] S10, obtaining an initial stirring power value, and setting the initial stirring power value as the current stirring power;

[0059] S20, collecting real-time data of the sensor group, including sludge viscosity data, sludge moisture content data and sludge temperature data;

[0060] S30, calculating the theoretical stirring power value according to the real-time data using a preset sludge characteristic model;

[0061] S40, comparing the current stirring power with the theoretical stirring power value, and calculating the power deviation value;

[0062] S50, determining whether the power deviation value exceeds a preset threshold value, if so, proceeding to step S60, if not, returning to step S20;

[0063] S60, calculating the stirring power adjustment amount using a fuzzy control algorithm according to the magnitude and positive and negative of the power deviation value;

[0064] S70, adding the current stirring power to the stirring power adjustment amount to obtain a new stirring power value;

[0065] S80, outputting the new stirring power value to the frequency converter to adjust the speed of the stirring motor;

[0066] S90, updating the current stirring power to a new stirring power value, returning to step S20, and cyclically executing the stirring power adaptive adjustment.

[0067] The present embodiment relates to a specific structure and working process of a sludge solidification mixer. The sludge solidification mixer includes: a mixing drum, a driving device, a mixing device, a feeding device, a discharging device, a curing agent adding device, a cleaning device, a dust removal device and a control device. Among them, the mixing drum is cylindrical, vertically arranged, with a feeding port at the top and a discharging port at the bottom. The driving device includes a motor and a reducer, and the motor is connected to the mixing device through the reducer. The mixing device includes a main shaft, a plurality of stirring arms and a plurality of stirring blades. The main shaft is vertically arranged in the mixing drum, and the plurality of stirring arms are evenly distributed along the circumference of the main shaft and fixedly connected to the main shaft. The plurality of stirring blades are respectively fixed on the stirring arms. The feeding device is arranged at the top of the mixing drum, including a feeding hopper, a feeding gate and a feeding conveyor belt. The discharging device is arranged at the bottom of the mixing drum, including a discharging gate, a discharging hopper and a discharging conveyor belt. The curing agent adding device includes a curing agent storage tank, a metering pump and a spray pipe. The cleaning device includes a cleaning water tank, a high-pressure water pump and a cleaning nozzle. The dust removal device includes a dust collecting hood, a dust removal pipeline and a bag dust collector. The control device is electrically connected with the driving device, the stirring device, the feeding device, the discharging device, the curing agent adding device, the cleaning device and the dust removal device.

[0068] The wall of the mixing drum is provided with an observation window, which is made of a transparent wear-resistant material; the outer wall of the mixing drum is provided with a heating device, which includes an electric heating wire and a heat preservation layer. The main shaft of the mixing device is provided with multiple groups of stirring arms, each group of stirring arms includes 2 to 4 stirring arms evenly distributed along the circumference of the main shaft, and the installation angles of two adjacent groups of stirring arms on the main shaft are staggered. The stirring blade is an arc-shaped plate structure, which matches the curvature of the inner wall of the mixing drum. The angle between the stirring blade and the stirring arm is to, and the surface is provided with multiple through holes, which are distributed in a plum blossom shape.

[0069] The feed hopper of the feeding device is a funnel-shaped structure, and the upper cross-sectional area is larger than the lower cross-sectional area; the feeding gate is an electric gate, which is electrically connected to the control device; the feeding conveyor belt is a belt conveyor, and the belt surface is provided with anti-slip patterns, and baffles are provided on both sides. The discharge gate of the discharging device is a hydraulically driven gate valve, which is electrically connected to the control device; the discharging hopper is a funnel-shaped structure, and the inner wall is provided with an anti-stick coating; the discharging conveyor belt is a scraper conveyor, and the conveying trough is a U-shaped structure, and a rubber sealing strip is provided between the scraper and the inner wall of the conveying trough.

[0070] The curing agent storage tank of the curing agent adding device is a cylindrical structure, with a feed port and a vent hole on the top and a discharge port on the bottom; the metering pump is a screw pump, the inlet is connected to the discharge port of the curing agent storage tank, and the outlet is connected to the injection pipe; the injection pipe is a ring pipe, which is arranged along the circumference of the inner wall of the mixing drum, and the nozzles are evenly distributed along the circumference of the pipe. The cleaning water tank of the cleaning device is a square structure, with a water inlet and an overflow port on the top and a drain port on the bottom; the high-pressure water pump is a plunger pump, the inlet is connected to the drain port of the cleaning water tank, and the outlet is connected to the cleaning nozzle; the cleaning nozzle is a fan-shaped nozzle, which is evenly distributed along the circumference of the inner wall of the mixing drum, and the injection angle is to. The dust collecting hood of the dust removal device is an umbrella-shaped structure, and the edge is sealed and connected to the top of the mixing drum; the dust removal pipeline is a corrugated pipe, one end of which is connected to the dust collecting hood, and the other end is connected to the bag dust collector; the bag dust collector includes a box body, a bag, a vibrating device and a fan.

[0071] The control device includes a control cabinet, a touch screen and multiple sensors. A programmable logic controller (PLC) and a frequency converter are installed in the control cabinet. The sensors include a temperature sensor, a humidity sensor, a pressure sensor and a position sensor, which are respectively arranged on the inner wall and the bottom of the mixing drum. The control device displays various parameters through the touch screen and automatically adjusts the working state of each device according to the data fed back by the sensor.

[0072] The PLC is also provided with a stirring power adaptive adjustment module, and a stirring sensor group arranged in the stirring drum, including a sludge viscosity sensor, a sludge moisture content sensor and a sludge temperature sensor. The stirring power adaptive adjustment module is implemented by the following steps:

[0073] Step S10: Obtain an initial stirring power value and set it as the current stirring power. First, obtain an initial stirring power value from the initial setting parameters of the stirring device and set it as the current stirring power value. This initial stirring power value can be obtained through an empirical formula or actual test.

[0074] Step S20: Collect real-time data from the sensor group, including sludge viscosity, moisture content and temperature. The sensor group in the mixing drum collects key parameters such as sludge viscosity, moisture content and temperature in real time. These parameters will be used as subsequent input data.

[0075] Step S30: Calculate the theoretical stirring power value based on the real-time data using the preset sludge characteristic model. The real-time data collected in step S20 is brought into the pre-established sludge characteristic model, and the theoretical stirring power value required is calculated through the model. This sludge characteristic model can be established based on an empirical formula or a machine learning algorithm.

[0076] Step S40: Compare the current stirring power with the theoretical stirring power value and calculate the power deviation value. Compare the current stirring power value in step S10 with the theoretical stirring power value calculated in step S30 and calculate the difference between the two, i.e., the power deviation value.

[0077] Step S50: Determine whether the power deviation value exceeds a preset threshold. Compare the power deviation value calculated in step S40 with the preset threshold. If the deviation value exceeds the threshold, proceed to step S60; otherwise, return to step S20 to continue execution. The threshold here can be set to.

[0078] Step S60: Calculate the stirring power adjustment amount using the fuzzy control algorithm according to the size and positive and negative of the power deviation value. The stirring power amount to be adjusted is calculated by the fuzzy control algorithm in combination with the size and positive and negative of the power deviation value obtained in step S40. The fuzzy control algorithm can use a triangular membership function and set 7 language variables, such as {NB, NM, NS, ZO, PS, PM, PB}.

[0079] Among them, the meanings of the above seven language variables are as follows:

[0080] NB (Negative Big): Negative Big

[0081] NM (Negative Medium): Negative Medium

[0082] NS (Negative Small): Negative Small

[0083] ZO(Zero):zero

[0084] PS (Positive Small): Positive Small

[0085] PM (Positive Medium): Middle

[0086] PB (Positive Big): Zhengda

[0087] Step S70: Add the current stirring power to the stirring power adjustment amount to obtain a new stirring power value. Add the stirring power adjustment amount calculated in step S60 to the current stirring power value in step S10 to obtain a new stirring power value.

[0088] Step S80: Output the new stirring power value to the frequency converter to adjust the speed of the stirring motor. Output the new stirring power value calculated in step S70 to the frequency converter to drive the stirring motor to adjust the speed to achieve adaptive adjustment of the stirring power.

[0089] Step S90: Update the current stirring power to the new stirring power value, return to step S20, and execute the stirring power adaptive adjustment in a loop. After completing step S80, update the new stirring power value to the current stirring power, and then return to step S20 to continue to execute the next cycle of adaptive adjustment.

[0090] Through the above steps, the stirring power adaptive adjustment module can monitor the changes in sludge characteristics in real time, and dynamically adjust the stirring power according to the real-time data to ensure the optimal performance of the stirring process.

[0091] Embodiment 1:

[0092] Step S10: Obtain an initial stirring power value and set it as the current stirring power. First, obtain an initial stirring power value P0 from the initial setting parameters of the stirring device and set it as the current stirring power value P c ,Right now:

[0093] P c =P0;

[0094] Among them, P0 can be obtained through empirical formula or actual test, which represents the power value of the stirring equipment in the initial state.

[0095] Step S20: Collect real-time data from the sensor group, including sludge viscosity, moisture content and temperature. The sensor group in the mixing drum collects key parameters of the sludge in real time, including:

[0096] η: dynamic viscosity of sludge, Pa·s;

[0097] w: sludge moisture content, % ；

[0098] T: sludge temperature, °C;

[0099] These parameters will serve as input data for subsequent steps.

[0100] Step S30: Calculate the theoretical stirring power value based on the real-time data using the preset sludge characteristic model. The real-time data η, w, T collected in step S20 are brought into the pre-established sludge characteristic model, and the theoretical stirring power value P is calculated through the model. th The sludge characteristic model can be established based on the following empirical formula:

[0101]

[0102] Among them, K1, K2, K3, and K4 are constant coefficients, which need to be fitted through actual tests or machine learning algorithms. This model describes the influence of sludge properties on theoretical stirring power.

[0103] Step S40: Compare the current stirring power with the theoretical stirring power value and calculate the power deviation value. c , and the theoretical stirring power value P calculated in step S30 th Compare and calculate the difference between the two, that is, the power deviation value AP:

[0104] AP=P c -P th ;

[0105] Step S50: Determine whether the power deviation value exceeds a preset threshold. Compare the power deviation value AP calculated in step S40 with the preset threshold ΔP th Compare. If |ΔP|>ΔP th , then proceed to step S60; otherwise, return to step S20 to continue execution. Here the threshold ΔP th Can be set to 5%.

[0106] Step S60: Calculate the stirring power adjustment amount using the fuzzy control algorithm according to the magnitude and sign of the power deviation value. The fuzzy control algorithm is combined with the magnitude and sign of the power deviation value AP obtained in step S40 to calculate the stirring power amount AP that needs to be adjusted. a The fuzzy control algorithm can adopt triangular membership functions and set 7 linguistic variables: {NB, NM, NS, ZO, PS, PM, PB}.

[0107] The specific algorithm is as follows:

[0108] 1) Normalize to μ = AP / ΔP th ;

[0109] 2) According to the value of , determine its membership μ NB , μ NM , μ NS , μ ZO , μ PS , μ PM , μ PB ;

[0110] 3) According to the fuzzy rules, calculate the output ΔP a The degree of membership;

[0111] 4) Use the centroid method to defuzzify and obtain the final ΔP a ;

[0112] Step S70: Add the current stirring power to the stirring power adjustment value to obtain a new stirring power value. a , and the current stirring power value P in step S10 cAdd together to get a new stirring power value P new :

[0113] P new =P c +ΔP a ;

[0114] Step S80: Output the new stirring power value to the frequency converter to adjust the speed of the stirring motor. new , output to the inverter, drive the stirring motor to adjust the speed n new , in order to achieve adaptive adjustment of stirring power. The relationship between the two can be expressed as:

[0115]

[0116] Among them, K m is the motor power factor. By adjusting the motor speed n new ,, the adaptive control of stirring power can be realized.

[0117] Step S90: Update the current stirring power to the new stirring power value, return to step S20, and execute the stirring power adaptive adjustment in a loop. After completing step S80, the new stirring power value P new Updated to current stirring power P c Then return to step S20 to continue to perform the next cycle of adaptive adjustment:

[0118] P c =P new ;

[0119] Through the above steps, the stirring power adaptive adjustment module can monitor the changes in sludge characteristics in real time, and dynamically adjust the stirring power according to the real-time data to ensure the optimal performance of the stirring process.

[0120] In general, the core idea of ​​the adaptive adjustment algorithm is:

[0121] 1. Get the initial stirring power as the current power

[0122] 2. Real-time collection of sludge property parameters

[0123] 3. Calculate the theoretical power required based on the preset sludge characteristic model

[0124] 4. Compare the current power with the theoretical power and calculate the power deviation

[0125] 5. If the deviation is too large, the fuzzy control algorithm is used to calculate the power adjustment amount

[0126] 6. Update the current power and output it to the inverter to adjust the motor speed

[0127] 7. Repeat the above steps to achieve adaptive adjustment of stirring power

[0128] This adaptive power adjustment method can ensure that the mixing process is always in the optimal state, improve the sludge solidification efficiency and reduce energy waste.

[0129] The technical solution of the sludge solidification mixer proposed in the present invention mainly includes the following key points:

[0130] 1. Optimize the structure of the stirring device. The stirring device consists of a main shaft, multiple stirring arms and multiple stirring blades. The stirring arms are evenly distributed along the circumference of the main shaft, and the installation angles of two adjacent groups of stirring arms are staggered to form a staggered stirring track. This arrangement of stirring arms can effectively break up sludge clumps, enhance the shear stress and turbulence inside the sludge, and thus improve the mixing uniformity of sludge and curing agent. At the same time, the arc-shaped stirring blade design can produce good convection and turbulence effects, further promoting full contact between the two.

[0131] 2. Realize adaptive adjustment of stirring power. The present invention integrates an adaptive adjustment module for stirring power in the control system. By real-time monitoring of key parameters such as sludge viscosity, moisture content and temperature, combined with a preset sludge characteristic model, the theoretical required stirring power value is calculated. Then, the theoretical power value is compared with the current actual stirring power. If the difference between the two is too large, that is, it exceeds the preset threshold, the fuzzy control algorithm is used to calculate the amount of power that needs to be adjusted, and output it to the frequency converter to dynamically adjust the motor speed, thereby realizing adaptive optimization of the stirring power. This adaptive adjustment mechanism can ensure that the stirring process is always in the best state, improve the curing efficiency, and significantly reduce energy consumption.

[0132] 3. Optimize the design of the discharge device. The discharge device of the present invention includes a discharge gate, a discharge hopper and a discharge conveyor belt. Among them, the discharge gate adopts a hydraulically driven gate valve structure, which can effectively avoid the blockage of the solidified sludge; the discharge hopper adopts a funnel-shaped structure, and the inner wall is coated with an anti-stick coating to further reduce the adhesion problem of the sludge during the discharge process; the discharge conveyor belt uses a scraper conveyor, and its U-shaped conveying trough and rubber sealing strip design can ensure the smooth flow of sludge and avoid blockage. The optimized design of this discharge device ensures the continuous and stable operation of the entire solidification process and improves reliability and applicability.

[0133] In summary, the present invention aims at the problems existing in the prior art and makes innovative designs from three aspects: the structure of the stirring device, power control and the discharging system. The optimized stirring structure can improve the mixing uniformity of the sludge and the solidifying agent, and the adaptive power adjustment mechanism ensures that the stirring process is always in the optimal state while reducing energy consumption; and the innovative design of the discharging device effectively solves the problem of easy clogging of the sludge after solidification. The ingenious combination of these technical solutions has made the sludge solidification mixer of the present invention significantly improved and advanced in terms of solidification effect, energy utilization and process stability compared with the prior art, and has strong practical value and broad application prospects.

[0134] Embodiment 2:

[0135] This embodiment describes a structural design of a sludge solidification mixer that specifically implements the present invention. The main components of the mixer include: a mixing drum, a driving device, a stirring device, a feeding device, a discharging device, a solidifying agent adding device, a cleaning device, a dust removal device and a control device.

[0136] The mixing drum adopts a cylindrical structure and is set vertically. Its dimensions are 2 meters in diameter and 4.5 meters in height. There is a feed port at the top of the mixing drum with a diameter of 1 meter, and a discharge port at the bottom with a diameter of 0.8 meters. There is also an observation window on the wall of the mixing drum. The observation window is made of wear-resistant tempered glass with a diameter of 0.5 meters, which is convenient for staff to observe the mixing process. There is also a heating device on the outer wall of the mixing drum, including an electric heating wire wrapped around the wall of the drum and an outer insulation layer, which can heat the inside of the mixing drum as needed. The bottom of the mixing drum adopts a 30° conical structure design, which is conducive to the sludge gathering to the discharge port under the action of gravity.

[0137] The driving device includes a 7.5kW AC asynchronous motor and a reducer with a reduction ratio of 15:1. The motor is connected to the output shaft of the reducer through a coupling, and the driving device can drive the stirring device to rotate.

[0138] The stirring device consists of 1 main shaft, 8 groups of stirring arms and 32 stirring blades. The main shaft has a diameter of 150mm and is made of 304 stainless steel. It is vertically set in the center of the mixing drum. The 8 groups of stirring arms are evenly distributed along the circumference of the main shaft. Each group includes 3 stirring arms, and the installation angles of two adjacent groups of stirring arms are 45° apart. Each stirring arm is 1 meter long and made of Q235 carbon steel. The 32 stirring blades are made of arc-shaped steel plate structure with a length of 0.8 meters, which matches the curvature of the inner wall of the mixing drum and has an angle of 45° with the stirring arm. There are also 10 perforations with a diameter of 20mm on the surface of each stirring blade, which are distributed in a plum blossom shape.

[0139] The feeding device is located at the top of the mixing drum, including a funnel-shaped feeding hopper, an electric feeding gate and a belt conveyor. The upper diameter of the feeding hopper is 1.2 meters, the lower diameter is 0.8 meters, and it is a funnel-shaped structure. The feeding gate is electrically driven and can be opened and closed automatically. The belt conveyor is 0.8 meters wide, with anti-slip textures on the belt surface and protective baffles on both sides to transport the curing agent or sludge to the feeding hopper.

[0140] The discharging device is located at the bottom of the mixing drum, including a hydraulically driven gate valve discharging gate, a funnel-shaped discharging hopper and a scraper conveyor. The discharging gate adopts a hydraulically driven gate valve with a diameter of 0.7 meters. The discharging hopper is funnel-shaped, with an upper diameter of 1 meter and a lower diameter of 0.6 meters. The inner wall is coated with polytetrafluoroethylene anti-stick coating. The conveying trough of the scraper conveyor is a U-shaped section with a width of 0.7 meters. A rubber sealing strip is provided between the trough wall and the scraper.

[0141] The curing agent adding device includes a cylindrical curing agent storage tank, a screw pump metering pump and an annular injection pipe. The curing agent storage tank has a diameter of 1 meter and a height of 2 meters. It is provided with a feed inlet and a vent hole on the top and a discharge port at the bottom. The metering pump is a butterfly screw pump with a flow range of 0.1-10 liters / min, which can accurately measure the amount of curing agent added. The annular injection pipe is arranged along the inner wall of the mixing drum, with a diameter of 50mm and 10 nozzles with a diameter of 10mm evenly distributed.

[0142] The cleaning device consists of a square cleaning water tank, a plunger high-pressure water pump and multiple fan-shaped nozzles. The size of the cleaning water tank is 1m×1m×1.2m, with a water inlet and overflow port on the top and a drain port on the bottom. The high-pressure water pump is a 3kW plunger pump with an outlet pressure of up to 15MPa. The 10 fan-shaped nozzles are evenly spaced along the inner wall of the mixing drum, with a spray angle of 90°.

[0143] The dust removal device includes an umbrella-shaped dust hood, a bellows dust removal pipe and a bag dust collector. The diameter of the dust hood is 1.2 meters, and the edge is sealed and connected to the top of the mixing drum. The dust removal pipe adopts a DN100 bellows, one end of which is connected to the dust hood and the other end is connected to the air inlet of the bag dust collector. The bag dust collector includes a 1.2m×1.2m×2m box, which is equipped with 16 filter bags. The lower part of the filter bag is connected to the ash hopper. There is a vibration device on the top of the box and a 4kW centrifugal fan on the side wall.

[0144] The control device consists of a control cabinet, a touch screen display interface and multiple sensors. The control cabinet integrates a programmable logic controller (PLC) and a frequency converter. The sensors include two temperature sensors (installed on the inner wall of the mixing drum), a humidity sensor (installed on the inner wall of the mixing drum), a pressure sensor (installed on the bottom of the mixing drum) and two position sensors (installed on the feed gate and the discharge gate). The touch screen display interface centrally displays various process parameters. The PLC can automatically adjust the working status of the drive device, stirring device, feeding device, discharging device, curing agent adding device, cleaning device and dust removal device according to the data fed back by the sensors.

[0145] The specific working process of the sludge solidification mixer is as follows: First, the sludge and solidifying agent (such as cement) are transported to the feed hopper through the feed conveyor belt. After the feed gate is opened, the sludge and solidifying agent fall into the mixing drum. The driving device drives the stirring device to rotate, and multiple stirring arms and stirring blades vigorously stir the sludge. At the same time, the solidifying agent adding device sprays the solidifying agent into the mixing drum to fully mix with the sludge. During the stirring and solidifying process, the control device will monitor the temperature, humidity, pressure and other parameters in the mixing drum in real time, and automatically adjust the stirring power, solidifying agent dosage and other process parameters according to the feedback to ensure the best solidification effect.

[0146] When the solidification meets the requirements, the discharge gate opens, and the solidified sludge flows out from the discharge port under the action of gravity, and is transported to the subsequent processing equipment through the discharge hopper and scraper conveyor. At the same time, the high-pressure water pump of the cleaning device will spray cleaning water on the inner wall of the mixing drum to clean the equipment and avoid sludge residue. The dust collection hood of the dust removal device can capture the dust generated during the mixing process and discharge it after purification by the bag dust collector.

[0147] Through the above structural design and process flow, the sludge solidification mixer can achieve efficient mixing of sludge and solidifying agent, ensuring a good solidification effect. At the same time, it has automatic control and cleaning and dust removal functions, which improves the stability and reliability of the entire solidification process.

[0148] Embodiment 3:

[0149] Second embodiment of the stirring power adaptive adjustment module

[0150] This embodiment focuses on the specific implementation scheme of the stirring power adaptive adjustment module in the sludge solidification mixer of the present invention. The module can dynamically adjust the stirring power according to the real-time changes in the sludge properties during the stirring process to ensure that the stirring process is always in the optimal state.

[0151] The working principle of the stirring power adaptive adjustment module is as follows:

[0152] 1. Obtain initial stirring power

[0153] First, obtain an initial stirring power value P0 from the initial setting parameters of the stirring device and set it as the current stirring power value P c , that is, P c =P0. This initial stirring power value can be obtained through empirical formula or actual test, and represents the power value of the stirring equipment in the initial state.

[0154] 2. Real-time collection of sludge property parameters

[0155] The sensor group installed in the mixing drum collects key parameters of sludge in real time, including:

[0156] η: dynamic viscosity of sludge, Pa·s;

[0157] w: sludge moisture content, % ；

[0158] T: sludge temperature, °C;

[0159] These parameters will serve as input data for subsequent steps.

[0160] 3. Calculate theoretical stirring power

[0161] The real-time data η, w, T collected in step 2 are introduced into the pre-established sludge characteristic model, and the theoretical stirring power value P is calculated through the model. th The model can be expressed using the following empirical formula:

[0162] P th =0.2·η 0.8 ·w 0.6 ·T 0.4 ;

[0163] Among them, 0.2, 0.8, 0.6, and 0.4 are constant coefficients obtained through actual test fitting. This model describes the influence of sludge properties on theoretical stirring power.

[0164] 4. Compare the current stirring power with the theoretical power

[0165] Set the current stirring power value P in step 1 c , and the theoretical stirring power value P calculated in step 3 th Compare and calculate the difference between the two, that is, the power deviation value AP:

[0166] AP=P c -P th ;

[0167] 5. Determine whether the power deviation exceeds the limit

[0168] The power deviation value AP calculated in step 4 is compared with the preset threshold ΔP th =5% for comparison. If |ΔP|>ΔP th , then proceed to the next step of adjustment; otherwise, return to step 2 to continue.

[0169] 6. Calculate stirring power adjustment

[0170] Through the fuzzy control algorithm, combined with the size and positive and negative of the power deviation value AP obtained in step 4, the stirring power amount ΔP that needs to be adjusted is calculated a The specific steps of the fuzzy control algorithm are as follows:

[0171] (1) Normalize AP to μ = AP / ΔP th ;

[0172] (2) According to the value of μ, determine its membership μ NB , μ NM , μ NS , μ ZO , μ PS , μ PM , μ PB ;

[0173] (3) According to the fuzzy rules shown in Table 1, calculate the output ΔP a The degree of membership;

[0174] (4) Use the centroid method to defuzzify and obtain the final ΔP a ;

[0175] Table 1 Fuzzy control rules table

[0176] μ NB NM NS ZO PS PM PB NB NB NB NM NM NS ZO PS NM NB NM NS NS ZO PS PM NS NM NS NS ZO PS PB PM ZO NM NS ZO ZO PS PM PB PS NS ZO PS PS PM PB PB PM ZO PS PM PM PB PB PB PB PS PM PB PB PB PB PB

[0177] 7. Update current stirring power

[0178] The stirring power adjustment value ΔP calculated in step 6 a , added to the current stirring power value in step 1 to obtain a new stirring power value P new :

[0179] P new =P c +ΔP a ;

[0180] 8. Output to the inverter to adjust the motor speed

[0181] The new stirring power value P calculated in step 7 new , output to the inverter, drive the stirring motor to adjust the speed n new , in order to achieve adaptive adjustment of stirring power. The relationship between the two can be expressed as:

[0182]

[0183] By adjusting the motor speed n new , adaptive control of stirring power can be achieved.

[0184] 9. Loop execution adaptive adjustment

[0185] After completing step 8, set the new stirring power value P new Updated to current stirring power P c , and then returns to step 2 to continue the adaptive adjustment of the next cycle.

[0186] In order to more intuitively demonstrate the effect of adaptive adjustment of stirring power, a typical operating condition change process was simulated and key parameters were analyzed by plotting. Figure 4 As shown in the figure, the changes of sludge viscosity η, water content w and temperature T over time during the stirring process are shown. It can be seen that these parameters fluctuate greatly during the stirring process, which is also the main reason why the stirring power needs to be dynamically adjusted.

[0187] Figure 4 The variation trend of sludge viscosity, moisture content and temperature over time during the stirring process is demonstrated, which reflects the parameter fluctuation mentioned in the embodiment and verifies the necessity of dynamic adjustment.

[0188] The viscosity fluctuates in the range of 2000-3000 Pa·s, the water content varies in the range of 60-70%, and the temperature fluctuates in the range of 22-28°C. It can be seen that these parameters fluctuate greatly during the stirring process, which is also the main reason why the stirring power needs to be dynamically adjusted.

[0189] like Figure 5 As shown, the comparison between the theoretically calculated required power and the actual adjusted stirring power is shown, which verifies the power adaptive adjustment effect mentioned in the embodiment; the actual power curve can better follow the change trend of the theoretical power curve.

[0190] like Figure 6 As shown, the percentage deviation between the actual power and the theoretical power is displayed, and the red dotted line indicates the threshold range of ±5%, which verifies the control effect of the deviation control within the range of ±5% mentioned in the embodiment.

[0191] like Figure 7 The figure shows the control effect evaluation diagram, which statistically shows the distribution of power deviation. The red dotted line represents the control threshold of ±5%, which intuitively demonstrates the control accuracy and verifies that the deviation is controlled within the threshold range most of the time.

[0192] In summary, the stirring power adaptive adjustment module of the present invention can dynamically adjust the stirring power by real-time monitoring of sludge property parameters, combined with pre-built characteristic models and fuzzy control algorithms, to always ensure that the stirring process is in the optimal state. This can not only improve the solidification effect and reduce energy consumption, but also significantly improve the stability and reliability of the entire solidification process, bringing significant technical progress to sludge solidification treatment.

[0193] Specifically, the principle of the present invention is: the technical solution of the sludge solidification mixer proposed by the present invention mainly includes the following key points:

[0194] 1. Optimize the structure of the stirring device. The stirring device consists of a main shaft, multiple stirring arms and multiple stirring blades. The stirring arms are evenly distributed along the circumference of the main shaft, and the installation angles of two adjacent groups of stirring arms are staggered to form a staggered stirring trajectory. This arrangement of stirring arms can effectively break up sludge clumps, enhance the shear stress and turbulence inside the sludge, and thus improve the mixing uniformity of sludge and curing agent. At the same time, the arc-shaped stirring blade design can produce good convection and turbulence effects, further promoting full contact between the two.

[0195] 2. Realize adaptive adjustment of stirring power. The present invention integrates an adaptive adjustment module for stirring power in the control system. By real-time monitoring of key parameters such as sludge viscosity, moisture content and temperature, combined with a preset sludge characteristic model, the theoretical required stirring power value is calculated. Then, the theoretical power value is compared with the current actual stirring power. If the difference between the two is too large, that is, it exceeds the preset threshold, the fuzzy control algorithm is used to calculate the amount of power that needs to be adjusted and output it to the frequency converter to dynamically adjust the motor speed, thereby realizing adaptive optimization of the stirring power. This adaptive adjustment mechanism can ensure that the stirring process is always in the best state, improve the curing efficiency, and significantly reduce energy consumption.

[0196] 3. Optimize the design of the discharge device. The discharge device of the present invention includes a discharge gate, a discharge hopper and a discharge conveyor belt. Among them, the discharge gate adopts a hydraulically driven gate valve structure, which can effectively avoid the blockage of the solidified sludge; the discharge hopper adopts a funnel-shaped structure, and the inner wall is coated with an anti-stick coating to further reduce the adhesion problem of the sludge during the discharge process; the discharge conveyor belt uses a scraper conveyor, and its U-shaped conveying trough and rubber sealing strip design can ensure the smooth flow of sludge and avoid blockage. The optimized design of this discharge device ensures the continuous and stable operation of the entire solidification process and improves reliability and applicability.

Claims

1. A sludge solidification mixer, characterized in that , including: a mixing drum, a driving device, a stirring device, a feeding device, a discharging device, a curing agent adding device, a cleaning device, a dust removal device and a control device; the mixing drum is cylindrical and vertically arranged, and a feeding port is provided at the top of the mixing drum and a discharging port is provided at the bottom; the driving device includes a motor and a reducer, and the motor is connected to the mixing device through the reducer; the stirring device includes a main shaft, a plurality of stirring arms and a plurality of stirring blades, the main shaft is vertically arranged in the mixing drum, the plurality of stirring arms are evenly distributed along the circumference of the main shaft and are fixedly connected to the main shaft, and the plurality of stirring blades are respectively fixed on the stirring arms; the feeding device is arranged at the top of the mixing drum, and includes a feeding hopper, a feeding gate and a feeding conveyor belt, the feeding hopper is connected to the feeding port, the feeding gate is arranged between the feeding hopper and the feeding port, and the feeding conveyor belt is inclined and extends to the top of the feeding hopper; the discharging device is arranged at the bottom of the mixing drum, and includes a discharging gate , a discharging hopper and a discharging conveyor belt, a discharging gate is arranged at the discharging port, the discharging hopper is located below the discharging gate, and the discharging conveyor belt is horizontally arranged below the discharging hopper; the curing agent adding device comprises a curing agent storage tank, a metering pump and an injection pipe, the curing agent storage tank is connected to the metering pump through a pipeline, the metering pump is connected to the mixing drum through the injection pipe, the injection pipe extends to the inside of the mixing drum and is provided with a plurality of nozzles; the cleaning device comprises a cleaning water tank, a high-pressure water pump and a cleaning nozzle, the cleaning water tank is connected to the high-pressure water pump through a pipeline, the high-pressure water pump is connected to the cleaning nozzle through a pipeline, and the cleaning nozzle is arranged on the inner wall of the mixing drum; the dust removal device comprises a dust collecting hood, a dust removal pipeline and a bag dust collector, the dust collecting hood is arranged on the top of the mixing drum, and is connected to the bag dust collector through the dust removal pipeline; the control device is electrically connected to the driving device, the stirring device, the feeding device, the discharging device, the curing agent adding device, the cleaning device and the dust removal device.

2. A sludge solidification mixer according to claim 1, characterized in that: An observation window is provided on the wall of the mixing drum, and the observation window is made of transparent wear-resistant material; a heating device is provided on the outer wall of the mixing drum, and the heating device includes a heating wire and a thermal insulation layer, the heating wire is wound on the outer wall of the mixing drum, and the thermal insulation layer covers the outside of the heating wire; the bottom of the mixing drum is a conical structure, and the top angle of the conical structure is 30 degrees to 60 degrees.

3. A sludge solidification mixer according to claim 2, characterized in that: The main shaft of the stirring device is provided with multiple groups of stirring arms, each group of stirring arms includes 2 to 4 stirring arms evenly distributed along the circumference of the main shaft; the installation angles of two adjacent groups of stirring arms on the main shaft are staggered; the stirring blade is an arc-shaped plate structure, the curvature of the stirring blade matches the curvature of the inner wall of the stirring barrel, and the angle between the stirring blade and the stirring arm is 30 degrees to 60 degrees; a plurality of through holes are provided on the surface of the stirring blade, and the through holes are distributed in a plum blossom shape.

4. A sludge solidification mixer according to claim 3, characterized in that: The feed hopper of the feeding device is a funnel-shaped structure, and the upper cross-sectional area of ​​the feed hopper is larger than the lower cross-sectional area; the feed gate is an electric gate, and the feed gate is electrically connected to the control device; the feed conveyor belt is a belt conveyor, and the belt surface of the belt conveyor is provided with anti-slip patterns, and baffles are provided on both sides of the belt conveyor.

5. A sludge solidification mixer according to claim 4, characterized in that: The discharging gate of the discharging device is a hydraulically driven gate valve, which is electrically connected to the control device; the discharging hopper is a funnel-shaped structure, and the inner wall of the discharging hopper is provided with an anti-stick coating; the discharging conveyor belt is a scraper conveyor, and the conveying trough of the scraper conveyor is a U-shaped structure, and a rubber sealing strip is provided between the scraper and the inner wall of the conveying trough.

6. A sludge solidification mixer according to claim 5, characterized in that: The curing agent storage tank of the curing agent adding device is a cylindrical structure, with a feed port and an air vent on the top and a discharge port on the bottom; the metering pump is a screw pump, the inlet of the screw pump is connected to the discharge port of the curing agent storage tank, and the outlet is connected to the injection pipe; the injection pipe is an annular pipe, which is arranged circumferentially along the inner wall of the mixing drum, and the nozzles are evenly distributed circumferentially along the annular pipe.

7. A sludge solidification mixer according to claim 6, characterized in that: The cleaning water tank of the cleaning device is of a square structure, with a water inlet and an overflow port on the top and a drain port on the bottom; the high-pressure water pump is a plunger pump, the inlet of the plunger pump is connected to the drain port of the cleaning water tank, and the outlet is connected to the cleaning nozzle; the cleaning nozzle is a fan-shaped nozzle, which is evenly distributed along the circumference of the inner wall of the mixing drum, and the spray angle of the nozzle is 60 to 120 degrees.

8. The sludge solidification mixer according to claim 7, characterized in that: The dust collecting hood of the dust removal device is an umbrella-shaped structure, and the edge of the dust collecting hood is sealed and connected to the top of the mixing drum; the dust removal pipe is a bellows, one end of the bellows is connected to the dust collecting hood, and the other end is connected to the bag-type dust collector; the bag-type dust collector includes a box body, a bag, a vibrating device and a fan, and a plurality of bags are arranged in the box body, the upper part of the bag is connected to the top of the box body, and the lower part is connected to the ash hopper, the vibrating device is arranged on the top of the box body, and the fan is arranged on the side wall of the box body.

9. A sludge solidification mixer according to claim 8, characterized in that: The control device comprises a control cabinet, a touch screen and a plurality of sensors; a programmable logic controller and a frequency converter are arranged in the control cabinet, and the touch screen is arranged on the surface of the control cabinet; the sensors comprise a temperature sensor, a humidity sensor, a pressure sensor and a position sensor, the temperature sensor and the humidity sensor are arranged on the inner wall of the mixing drum, the pressure sensor is arranged at the bottom of the mixing drum, and the position sensor is arranged at the feed gate and the discharge gate respectively; the control device displays various parameters through the touch screen, and automatically adjusts the working states of the driving device, the stirring device, the feeding device, the discharge device, the curing agent adding device, the cleaning device and the dust removal device according to the data fed back by the sensors.

10. The sludge solidification mixer according to claim 9, characterized in that: The programmable logic controller is provided with a stirring power adaptive adjustment module and a stirring sensor group provided in the stirring drum, wherein the stirring sensor group includes a sludge viscosity sensor, a sludge moisture content sensor and a sludge temperature sensor; the stirring power adaptive adjustment module considers the stirring power fluctuation caused by the change of different sludge properties and adjusts the stirring power in real time; the stirring power adaptive adjustment module is used to perform the following steps: S10, obtaining an initial stirring power value, and setting the initial stirring power value as the current stirring power; S20, collecting real-time data of the sensor group, including sludge viscosity data, sludge moisture content data and sludge temperature data; S30, calculating a theoretical stirring power value according to the real-time data using a preset sludge characteristic model; S40, comparing the current stirring power with the theoretical stirring power value, and calculating a power deviation value; S50, determining whether the power deviation value exceeds a preset threshold value, if so, proceeding to step S60, if not, returning to step S20; S60, calculating the stirring power adjustment amount using a fuzzy control algorithm according to the magnitude and positive and negative sign of the power deviation value; S70, adding the current stirring power to the stirring power adjustment amount to obtain a new stirring power value; S80, outputting the new stirring power value to the frequency converter to adjust the speed of the stirring motor; S90, updating the current stirring power to the new stirring power value, returning to step S20, and cyclically executing the stirring power adaptive adjustment.

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