An in-situ humification and drying control system for stockpiled garbage

Abstract

The present invention relates to an in-situ humification and drying control system for stockpiled garbage, belonging to the technical field of garbage treatment. It includes a PLC control module, a comprehensive monitoring unit, a wireless communication module, a blowing execution unit, and a turning execution unit; the PLC control module realizes the regulation of the moisture content of garbage materials by executing control strategies; the comprehensive monitoring unit is used to monitor the moisture content of garbage materials and the temperature, humidity, and pressure of the gas output by the blowing execution unit; the blowing execution unit is used to regulate the output parameters of the blower; the turning execution unit is used to regulate the rotation speed and output power of the turning machine motor, thereby regulating the advancing speed of the garbage materials. The present invention realizes the intelligent regulation of the garbage moisture content through the PLC control module executing control strategies, and at the same time, through obtaining coordinated control parameters, realizes the coordinated control of the advancing speed of the garbage materials and the air volume of the blower, so as to achieve the best effect of garbage moisture content control.

Description

Technical Field

[0001] The invention belongs to the technical field of garbage disposal, and in particular relates to an in-situ humification and drying control system for stock garbage. Background Art

[0002] When stock waste is finely screened, the moisture content of the stock waste will have different effects on the subsequent fine screening equipment. When the moisture content of the stock waste is high, the surface of the particles is prone to adhesion, forming lumps, and the moisture will increase the weight and volume of the waste. When processed by mechanical sorting / screening equipment, these small particles or fiber materials adhering to the particles will be difficult to separate, thus affecting the accuracy and efficiency. At the same time, the increase in moisture will increase the density of the waste, which will bring a greater load to the screening equipment, resulting in increased energy consumption and increased wear of wearing parts.

[0003] Therefore, in order to ensure the normal operation of subsequent fine screening equipment, the moisture content of the stock garbage needs to be controlled within an appropriate range, so as to improve work efficiency and achieve energy-saving effects. Summary of the invention

[0004] In order to solve the above-mentioned problems existing in the prior art, the present invention provides an in-situ humification and drying control system for stock garbage. By providing a turning execution unit, variable frequency speed regulation can be achieved to achieve the required material advancement speed. At the same time, by matching with a blowing execution unit, the air volume and air pressure of the blower are adjusted through frequency conversion to ensure that the material in the turning trough is dried under strong wind to achieve the purpose of controlling the moisture content of the material.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A stock garbage in-situ humification and drying control system, comprising a PLC control module, a comprehensive monitoring unit, a wireless communication module, an air blast execution unit and a flipping execution unit;

[0007] The comprehensive monitoring unit, the wireless communication module, the air blowing execution unit and the flipping execution unit respectively establish communication connections with the PLC control module;

[0008] The PLC control module controls the moisture content of the garbage material by executing a control strategy. Specifically, the control strategy includes:

[0009] Obtaining coordinated control parameters: Obtaining the working parameters of the blast execution unit and the flipping execution unit during the blast drying process through test operation;

[0010] Execute coordinated control parameters: apply the selected coordinated control parameters to the air blast execution unit and the flipping execution unit to perform air blast drying of the garbage materials;

[0011] Update the coordinated control parameters: Set the variation ranges of the temperature and humidity of the gas output by the blower. During operation, when the variations in the temperature and humidity of the actually output gas exceed the predetermined values, re-obtain the coordinated control parameters.

[0012] Modify the coordinated control parameters: Obtain the real-time moisture content of the material after regulation through the comprehensive monitoring unit, and fine-tune the coordinated control parameters when the moisture content exceeds the set range.

[0013] As a preferred technical solution of the present invention, the test run for obtaining the coordinated control parameters is specifically as follows:

[0014] Set the moisture content of the material after regulation and start the regulation timing.

[0015] Gradually adjust the material feeding speed and the air volume of the blower. In the initial state, select the output power of the turning machine according to the feeding speed, and then gradually increase the operating power of the blower operating at the minimum power until the maximum output power of the blower is reached. Record the drying time and energy consumption at each operating power of the blower.

[0016] Construct a curve of the drying time and the total energy consumption value, so as to select the coordinated control parameters according to the processing requirements and the energy-saving plan.

[0017] Among them, the moisture content of the material after regulation is set to 20% - 30%.

[0018] As a preferred technical solution of the present invention, during the process of obtaining the coordinated control parameters, the working parameters of the air blowing execution unit and the turning execution unit include the air volume and air pressure of the blower and the rotation speed and output power of the turning machine motor.

[0019] As a preferred technical solution of the present invention, the comprehensive monitoring unit is used to monitor the moisture content of the waste material and the temperature, humidity and pressure of the gas output by the air blowing execution unit.

[0020] As a preferred technical solution of the present invention, the comprehensive monitoring unit includes a plurality of temperature sensors, humidity sensors and pressure sensors, where:

[0021] The temperature sensor is used to detect the temperature of the waste material and the temperature of the gas output by the air blowing execution unit; the humidity sensor is used to detect the moisture content of the waste material and the humidity of the gas output by the air blowing execution unit; the pressure sensor is used to detect the pressure of the gas output by the air blowing execution unit.

[0022] The temperature of the waste material is controlled at 45°C - 65°C.

[0023] As a preferred technical solution of the present invention, the wireless communication module is used for the PLC control module to realize wireless data transmission and remote monitoring and control by the background server.

[0024] As a preferred technical solution of the present invention, the air blowing execution unit includes a frequency converter and a blower; the air blowing execution unit is used to regulate the output parameters of the blower, and the output parameters include air volume and air pressure.

[0025] As a preferred technical solution of the present invention, the turning and throwing execution unit includes a frequency converter and a turning and throwing machine;

[0026] The turning and throwing execution unit is used to regulate the rotation speed and output power of the turning and throwing machine motor, so as to regulate the advancing speed of the garbage material.

[0027] The beneficial effects of the present invention are as follows:

[0028] (1) Through the PLC control module executing the control strategy, the intelligent regulation of the garbage moisture content is realized. At the same time, by obtaining the coordinated control parameters, the coordinated control of the advancing speed of the garbage material and the air volume of the blower is realized, so as to achieve the best effect of garbage moisture content control; and in the selection of the coordinated control parameters, based on the drying time and the overall energy consumption, the efficiency and energy-saving effect of garbage treatment are further improved.

[0029] (2) By setting up the comprehensive monitoring unit, the system can obtain the temperature and humidity of the gas output by the blower and the real-time moisture content of the material after regulation in real time during the actual operation process, so as to update and correct the coordinated control parameters in time, improve the stability of the efficiency in the garbage treatment process, and improve the robustness and anti-interference ability of the system in this way of feedback correction. Description of the Drawings

[0030] For the convenience of those skilled in the art to understand, the present invention will be further described below with reference to the drawings.

[0031] Figure 1 It is a schematic structural diagram of the in-situ humification and drying control system for stockpiled garbage of the present invention;

[0032] Figure 2 It is a schematic execution diagram of the control strategy of the present invention. Detailed Embodiments

[0033] In order to further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following will describe in detail the specific embodiments, structures, features and effects of the present invention with reference to the drawings and preferred embodiments.

[0034] An in-situ humification and drying control system for stockpiled garbage, as Figure 1 shown, includes a PLC control module, a comprehensive monitoring unit, a wireless communication module, an air blowing execution unit and a turning and throwing execution unit;

[0035] The comprehensive monitoring unit, wireless communication module, air blowing execution unit, and turning and throwing execution unit are respectively communicatively connected to the PLC control module;

[0036] The comprehensive monitoring unit includes a number of temperature sensors, humidity sensors, and pressure sensors. Among them: the temperature sensors are used to detect the temperature of the garbage material and the temperature of the gas output by the air blowing execution unit; the humidity sensors are used to detect the moisture content of the garbage material and the humidity of the gas output by the air blowing execution unit; the pressure sensors are used to detect the pressure of the gas output by the air blowing execution unit.

[0037] It can be understood that the comprehensive monitoring unit is mainly used for detecting the moisture content of the garbage material and the parameters of the gas output by the air blowing execution unit. Since during the air blowing drying process, the properties of the material and the parameters of the gas output by the blower will directly affect the drying effect of the material, it is necessary to monitor the temperature, humidity, and pressure of the gas output by the air blowing execution unit when regulating the moisture content of the garbage material.

[0038] Specifically, during the actual operation process, the moisture content of the dried garbage material is controlled at 20% - 30%, and the temperature of the garbage material is controlled at 45°C - 65°C.

[0039] It should be noted that the detection of the moisture content of the garbage material includes before and after drying, which is convenient for completing the regulation of the moisture content of the garbage material. During the actual operation process, the sensors used for detecting the humidity of the garbage material adopt infrared sensors or ultrasonic sensors to achieve real-time monitoring of humidity, and at the same time, it can avoid the influence of humidity detection on the processing process.

[0040] The wireless communication module is used to enable the PLC control module to achieve wireless data transmission and remote monitoring and control by the background server.

[0041] It can be understood that through the wireless communication module, wireless communication can be achieved between the PLC control module and the background server, which is used for cloud storage of the data of the control system and for the staff to conduct remote monitoring and control and issue control strategies.

[0042] The air blowing execution unit includes a frequency converter and a blower, and is used to regulate the output parameters of the blower. The specific output parameters are air volume and air pressure.

[0043] The turning and throwing execution unit includes a frequency converter and a turning and throwing machine, and is used to regulate the rotation speed and output power of the motor of the turning and throwing machine, so as to regulate the propulsion speed of the garbage material.

[0044] It should be noted that the turning and throwing machine adopts a bucket wheel turning and throwing machine. During the actual operation process, a ventilation pipe is arranged at the bottom of the turning pile trough, and the ventilation pipe is connected to the blower. Through the turning and throwing of the bucket wheel turning and throwing machine, the material is dried under strong wind.

[0045] The PLC control module realizes the regulation of the moisture content of the waste materials by executing control strategies. Specifically, as Figure 2 shown, the control strategy is specifically as follows:

[0046] (1) Obtain coordinated control parameters: Obtain the working parameters of the air-blowing execution unit and the turning execution unit during the air-blowing drying process through test runs.

[0047] Furthermore, the test run is specifically as follows:

[0048] Set the moisture content of the materials after regulation and start the regulation timing;

[0049] Gradually adjust the material feeding speed and the air volume. In the initial state, select the output power of the turning machine according to the feeding speed, and then gradually increase the operating power of the blower operating at the minimum power until the maximum output power of the blower is reached. Record the drying time and energy consumption at each operating power of the blower.

[0050] Construct a curve of drying time and total energy consumption value, so as to select coordinated control parameters according to the processing requirements and energy-saving plan.

[0051] It can be understood that the working parameters include the air volume and air pressure of the blower and the rotation speed and output power of the turning machine motor. The air volume and air pressure of the blower are important parameters in the drying process, which will directly affect the heat and mass transfer effect. Increasing the air volume and air pressure can accelerate the volatilization of moisture on the material surface, but excessive air volume and air pressure may cause energy waste and loss.

[0052] It should be noted that the acquisition of coordinated control parameters is achieved by constructing a curve of the time taken for air-blowing drying to reach the same moisture content and the total energy consumption, and selecting the optimal control parameters for the air-blowing execution unit and the turning execution unit. The output power of the turning machine is set according to the feeding speed requirement of the processed materials. Several output power values can be set, and then the operating power of the blower is tested according to each selected power value.

[0053] (2) Execute the coordinated control parameters: Apply the selected coordinated control parameters to the air-blowing execution unit and the turning execution unit for air-blowing drying of the waste materials.

[0054] (3) Update the coordinated control parameters: Set the change range of the temperature and humidity of the gas output by the blower. During the operation, when the actual change in the temperature and humidity of the output gas exceeds the predetermined value, re-obtain the coordinated control parameters.

[0055] It is understandable that due to the different properties of the waste materials, they have different effects on the drying effect. For example, materials with poor hygroscopicity have a faster drying speed, while materials with good hygroscopicity have a slower drying speed. Therefore, before actually drying the waste materials by blowing air, it is necessary to obtain coordinated control parameters to achieve the best effect of blowing air drying of the waste materials. During the operation process, the temperature and humidity of the gas output by the blower will also affect the blowing air drying process, so it is necessary to reselect the coordinated control parameters.

[0056] It should be noted that during the operation of the system, a temperature and humidity sensor is installed at the outlet of the blower to monitor the temperature and humidity of the gas at the outlet of the blower in real time and transmit the real-time values to the PLC control module.

[0057] (4) Modify the coordinated control parameters: Obtain the real-time moisture content of the material after regulation through the comprehensive monitoring unit, and fine-tune the coordinated control parameters when the moisture content exceeds the set range.

[0058] It is understandable that to achieve the expected moisture content of the waste materials, the speed of material propulsion can be reduced or the air volume and air pressure output by the blower can be increased within the time regulation range and energy consumption range of waste material treatment. If the preset requirements are still not met after fine-tuning, re-obtain the coordinated control parameters.

[0059] The present invention is provided with a turning and throwing execution unit, which can achieve variable frequency speed regulation to reach the required material propulsion speed. At the same time, by matching with a blowing execution unit, the air volume and air pressure of the blower are adjusted through frequency conversion to ensure that the materials in the turning pile tank are dried under strong wind to achieve the purpose of controlling the material moisture content.

[0060] The present invention realizes the intelligent regulation of the waste moisture content through the PLC control module executing the control strategy. At the same time, by obtaining the coordinated control parameters, it realizes the coordinated control of the material propulsion speed and the blowing air volume of the waste materials, thereby achieving the best effect of waste moisture content control; and in the selection of the coordinated control parameters, based on the drying time and overall energy consumption, it further improves the efficiency and energy-saving effect of waste treatment.

[0061] The present invention is provided with a comprehensive monitoring unit, so that during the actual operation of the system, the temperature and humidity of the gas output by the blower and the real-time moisture content of the material after regulation can be obtained in real time, so as to update and modify the coordinated control parameters in a timely manner, improve the stability of the efficiency in the waste treatment process, and improve the robustness and anti-interference ability of the system in this feedback correction manner.

[0062] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments with equivalent changes within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. An in-situ humification and drying control system for stockpiled garbage, characterized in that: It includes a PLC control module, an integrated monitoring unit, a wireless communication module, a blast execution unit, and a turning execution unit; The integrated monitoring unit, the wireless communication module, the blast execution unit, and the turning execution unit are respectively communicatively connected to the PLC control module; The PLC control module realizes the regulation of the moisture content of the garbage material by executing a control strategy. Specifically, the control strategy specifically includes: Obtain coordinated control parameters: Obtain the working parameters of the blast execution unit and the turning execution unit during the blast drying process through test runs; Execute the coordinated control parameters: Apply the obtained coordinated control parameters to the blast execution unit and the turning execution unit for blast drying of the garbage material; Update the coordinated control parameters: Set the change ranges of the temperature and humidity of the gas output by the blower. During operation, when the changes in the actual output gas temperature and humidity exceed the predetermined values, re-obtain the coordinated control parameters; Correct the coordinated control parameters: Obtain the real-time moisture content of the material after regulation through the integrated monitoring unit, and make fine adjustments to the coordinated control parameters when the moisture content exceeds the set range; The test run for obtaining the coordinated control parameters is specifically as follows: Set the moisture content of the material after regulation and start the regulation timing; Gradually adjust the material feeding speed and the blast volume. In the initial state, select the output power of the turner based on the feeding speed, and then gradually increase the operating power of the blower operating at the minimum power until the maximum output power of the blower is reached. Record the drying time and energy consumption at each operating power of the blower; Construct a curve of drying time and total energy consumption value, so as to select coordinated control parameters according to the processing requirements and energy-saving plan; Among them, the moisture content of the material after regulation is set to 20% - 30%; The integrated monitoring unit is used to monitor the moisture content of the garbage material, and the temperature, humidity, and pressure of the gas output by the blast execution unit; The integrated monitoring unit includes several temperature sensors, humidity sensors, and pressure sensors, where: The temperature sensors are used to detect the temperature of the garbage material and the temperature of the gas output by the blast execution unit; the humidity sensors are used to detect the moisture content of the garbage material and the humidity of the gas output by the blast execution unit; the pressure sensors are used to detect the pressure of the gas output by the blast execution unit; The temperature of the garbage material is controlled at 45°C - 65°C.

2. The in-situ humification and drying control system for stockpiled waste according to claim 1, characterized in that: During the process of obtaining the coordinated control parameters, the working parameters of the blast execution unit and the turning execution unit include the air volume and air pressure of the blower, and the rotational speed and output power of the turner motor.

3. The in-situ humification and drying control system for stockpiled waste according to claim 1, characterized in that: The wireless communication module is used for the PLC control module to realize wireless data transmission and remote monitoring and control by the background server.

4. A stockpiled waste in-situ humification and drying control system according to claim 1, characterized in that: The blast execution unit includes an inverter and a blower; the blast execution unit is used to regulate the output parameters of the blower, and the output parameters include air volume and air pressure.

5. The in-situ humification and drying control system for stockpiled waste according to claim 1, characterized in that: The turning execution unit includes an inverter and a turner; The turning execution unit is used to regulate the rotational speed and output power of the turner motor, thereby regulating the feeding speed of the garbage material.

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