51results about How to "Realize closed-loop automatic control" patented technology

The invention relates to a dynamic gas elastic foil bearing with stability and adaptive control functions, comprising a bearing casing, a plurality of bearing pads, an elastic foil, and a piezoelectric ceramics micro displacement actuator. The dynamic gas elastic foil bearing is characterized in that the bearing pads are uniformly distributed along the inner wall of the bearing casing; the bearing pads are welded with a bottom bump foil and one end of a top foil; the other end of the top foil is lapped over an adjacent top foil, wherein the piezoelectric ceramics micro displacement actuator with one end fixed on a set screw and the other end arranged on a jig is connected with two bearing pads; the piezoelectric ceramics micro displacement actuator is connected with a feedback controller PID; an input of the feedback controller PID is connected with an eddy current displacement sensor. The dynamic gas elastic foil bearing with stability and adaptive control functions has the advantages of strengthened equivalent rigidity and equivalent damping of the elastic foil, restrained vibration of rotor system, improved bearing capacity and stability of the bearing, reduced size and structure, increased control precision of displacement, and quickened response speed.

The invention relates to a comprehensive simulation experimental device of a drilling circulation system. The comprehensive simulation experimental device of the drilling circulation system comprises a drilling liquid circulation loop, a rock debris circulation branch, an air injection branch and a data collection system. The drilling liquid circulation loop is formed by an annulus testing section, a Parshall flume, a vibration screen, a liquid storage pool and a frequency changing pump. The rock debris circulation branch is formed by sequentially connecting an air propeller, a rock debris collection tank, a packing tank and a screw pump through pipelines, wherein the air propeller is arranged on the vibration screen, and the screw pump is connected to the position of an inlet of the annulus testing section through a pipeline. The air injection branch is formed by connecting an air storage tank and an air compressor through a pipeline, wherein the compressor is connected with a tee joint through a pipeline. By means of the comprehensive simulation experimental device of the drilling circulation system, the migration rule of annulus rock debris under different hole drift angles can be observed, and radial concentration of the annulus rock debris under different hole drift angles and grain composition of the annulus rock debris in different river basins can be quantitatively measured.

The invention discloses an intelligent constant-flow individual air dust sampler and a constant-flow control method. The sampler is provided with a buffering air capacitor (2), an air capacitor (4), a flow closed-loop control circuit (16), pressure measuring openings (5, 6 and 7) and a differential pressure sensor (6), wherein the test end of the differential pressure sensor (6) is communicated with the pressure measuring opening on an air chamber (5) through a hose; the signal output end of the differential pressure sensor (6) is connected with an input port of a singlechip (7) through an amplifier and an A / D converter; and the output control end of the singlechip is connected with the electrical signal control end of the driving motor of an air pump (3) through an air pump control unit (19). The constant-flow control method comprises: a, establishing a flow correction curve; b, testing the backpressure of working gas at the outlet of the air chamber (5); and c, comparing a measured current backpressure with the flow curve and controlling the air pump (3) to implement constant-flow output. The sampler and the method can realize flow closed-loop control and automatic constant-flow sampling, improve the accuracy of dust mass concentration measurement and ensure reliable use and accurate control.

The invention relates to a device for optimized control over carbon source feeding in a denitrification biofilter process. The device is provided with a denitrification biofilter, a carbon source box, a frequency-conversion carbon source pump, a carbon source flowmeter, a backwashing air pump and a backwashing air inlet valve; the denitrification biofilter is internally provided with an online-water-inlet nitrate sensor, an online-water-inlet dissolved oxygen sensor, an online-water-outlet nitrate sensor, a nitrate determinator, a dissolved oxygen determinator, a process controller, and an industrial personal computer; and a water inlet pipeline is provided with a water inlet pump, a water inlet valve and an online-water inlet flowmeter. A method for optimized control cover the carbon source feeding is characterized by comprising the following steps of: (1) introducing water; (2) processing and judging parameters; (3) processing frequency ft by a frequency converter; (4) preventing excessive feeding of a carbon source; (5) stably running; (6) diagnosing faults; and (7) performing backwashing. The device and the method disclosed by the invention can be widely applied to sewage advanced treatment and nitrogenous industrial wastewater treatment, is particularly suitable for producing high-quality recycled water, have the advantages of complete structure, precision for control, good effect and high efficiency.

The invention provides a container aligning guide system for containers. The container aligning guide system comprises a container image acquisition module, a container aligning information promoting and displaying module and a central processing module, wherein the container image acquisition module comprises image pick-up equipment arranged on four corners of a container hanger; images of four corners of each container are acquired in real time through the image pick-up equipment, and are transmitted to the central processing module; the central processing module is used for carrying out image processing and analyzing, so that target positions on four corners of each container are detected, difference between target positions and an existing hanger position is obtained, and correcting information of guiding the hanger to get close to a target is given; when the hanger position is aligned to the target position, a signal is given to prompt an operator to drop the hanger to perform container dropping; and the container aligning information promoting and displaying module is used for displaying correcting information, given by the central processing module, of guiding the hanger to get close to the target, and the signal of promoting the operator to drop the hanger to perform container dropping. The system provided by the invention is simple in structure, is low in cost, is high in calculating precision and is high in efficiency.

The invention relates to an indicator diagram-based oil pumping machine regulating and controlling method. The method comprises the following steps: acquiring production parameters of an oil pumping machine well in real time; drawing an indicator diagram of an oil producing well by combining the parameters of the pump hanging, the pump diameter, the stroke, the stroke frequency and the liquid production capacity of an oil well, and calculating the saturation degree of the indicator diagram; performing analysis processing on the data of the indicator diagram and drawing a static load line; solving dynamic fluid level data of the oil well by utilizing dynamic fluid level calculating software; determining the reasonable submergence depth of the oil well according to the dynamic fluid level data of the oil well; performing analysis and calculation on the real-time production parameters of the oil well through a computer to obtain reasonable operating parameters of an oil pumping machine; remotely and intelligently regulating output frequency by utilizing a frequency conversion technology; changing the operating rotating speed of a motor of the oil pumping machine, so that the real-time closed-loop regulation of the working conditions of the oil well is realized. The regulating and controlling method disclosed by the invention is mainly used for optimizing the operating parameters of the oil pumping machine; the operating parameters of the oil pumping machine are regulated in real time; the automatic closed-loop control is realized.

The invention relates to an alignment guide system for a container. The guide system is characterized by comprising a container image acquisition module, a central processor module and an alignment information display module, wherein the container image acquisition module comprises cameras located at the four corner parts of a lifting appliance, and the images of the four corner parts of the container are shot by the cameras separately; the central processor module is used for identifying the target lock hole positions of the four corner parts of the container according to the images of the four corner parts, which are shot by the four cameras, and calculating the difference between the target lock hole positions and the current position of the lifting appliance; and the alignment information display module is used for displaying the target lock hole positions and the difference between the target lock hole positions and the current position of the lifting appliance, which are acquired by the central processor module, and tracking correction is carried out by operating personnel according to the displayed information. Compared with the prior art, the guide system disclosed by the invention has the following advantages: the defects of low accuracy and high random error of a single-point laser device, and high calculation quantity and high price of a three-dimensional laser device are avoided; and the guide system is high in accuracy, simple and convenient to operate, and reasonable in price during arrangement and execution.

The invention discloses a device for online measuring the wall thickness of a hot-rolled metal pipe by using gamma rays, which comprises a horizontally movable field measurement C-shaped box, a gamma ray detector, a charge coupled device (CCD) camera, a radioactive source, a field control box with a programmable logic controller (PLC) and a measurement signal conversion unit, an industrial personal computer main cabinet, an exchanger, a database server, a terminal set, a field cooling circulation water channel, a gas circuit and an infrared temperature measurer. The device realizes continuous automatic measurement on a hot-rolled metal pipe production line, and simultaneously can output control signals for realizing the automatic closed-loop control of a rolling mill. The CCD camera takes part in eccentricity correction calculation, so using restrictions to the measurement device are relaxed, and the measurement accuracy is improved and is lower than + / -0.2 percent. Simultaneously, measurement data is digitally transmitted, so the device realizes the long-distance and anti-interference transmission of the measurement signals and effectively solves the problems of long distance between a measurement field and an operating room and intensive field interference.

The invention relates to the field of seamless steel tube processing, in particular to a steel tube end part inductive heating device with a temperature detection system, comprising a box body (1), an inductive coil (2), a coil water inlet pipe (3), a coil water outlet pipe (4) and an inductive coil connecting bus bar (5), wherein the box body (1) is provided with a temperature-measuring probe fixing port (6); and a temperature-measuring probe (7) passes through the temperature-measuring probe fixing port (6) and extends into the inductive coil (2). The inductive heating device can be used for detecting the temperature at any time and transmitting a signal to a transmitter through an optical fiber transmitting wire, and ensures that the detected temperature signal is accurate, stable and is not interfered; and the acquired temperature signal curve is smooth, thereby ensuring the stability of the thickening quality of the steel tube and realizing the closed ring automatic control. In addition, according to the invention, the temperature-measuring probe is inserted as required, thereby effectively protecting the optical probe from being irradiated by high temperature for a long term, prolonging the service life and having broad application potentials.

The invention belongs to the technical field of aerospace engine environment simulation, and particularly relates to a heat flow control system and method for a thermal environment simulation test ofan attitude control power system. The technical problems of insufficient continuity and reliability of heat flow density control of a lamp array in the prior art and no early warning or emergency treatment in existing of gear deviation of heat flow measurement in the process are solved. The system is composed of an upper computer, a temperature controller, a silicon controlled rectifier power output device and a temperature / heat flow sensor. The temperature controller collects the heat flow / temperature value of a test piece, compares the heat flow / temperature value with the heat flow value received from the upper computer, controls the output power of the silicon controlled rectifier power output device by adopting a PID control algorithm, and feeds the collected heat flow / temperature value back to the upper computer for data storage and processing. The control method comprises open-loop control and can be switched from closed-loop control to open-loop control when a large deviation occurs in the heat flow value or the output voltage of the silicon controlled rectifier power output device.

The invention provides intelligent water meters adopting IoT (Internet of Things). Each meter is endowed with a unique code, and a central management computer is used for centralized information management through a mobile information communication network, an internet-IoT network and an offline terminal of an intelligent card network; a fee charging state of each water supply unit is generated through mechanical detection and measurement of the meters, fee charging is confirmed through instant communication and data exchange, and then valves are opened for a new round of water supply, and centralized information management control of water supply of disperse water meters is realized; alarm is performed when conditions of the next round of water supply are not met and surplus water is supplied continuously, and then the valves in the water meters are switched off automatically without an instruction or a power supply; measurement data of the water meters is not subjected to A / D (analog / digital) conversion or is controlled to be not subjected to D / A conversion; only one measurement data is provided for management and fee charging, and the requirement for unified measurement specified in the purpose of legislation of the Metrology Law is met; the current serious illegal situations that electronic water meters adopt double measurement, double control and double display of mechanical / electronic water supply data and the whole industry violates the Metrology Law of China on a large scale possibly end.

The invention relates to a washing device for a three-way catalytic converter and an inlet channel of an automobile and a control method. The device comprises a washing agent input pipeline and a washing agent flow control circuit, wherein one end of the pipeline is connected with a washing agent tank, the other end of the pipeline is provided with a vacuum pipeline interface of an engine, and the inside of the pipeline is orderly connected with a vacuum pressure sensor and an electromagnetic flow controller respectively; the circuit is provided with a vacuum pressure measurement interface and an electromagnetic flow control interface; and an interval of a maximum pressure value and a minimum pressure value of vacuum pressure is preset, the electromagnetic flow controller is in a state that the opening flow is 13.5g+ / -0.5g / m in the interval, otherwise, the electromagnetic flow controller is in a shutoff state. The device and the method have the advantages that the device and the method can realize the automatic closed-loop control of the inflow amount of a washing agent and the vacuum pressure; the device and the method ensure the washing quality of the three-way catalytic converter and the inlet channel of the engine and avoid the major breakdowns of piston seizure and cylinder plugging of the engine; and the device has a simple structure and extremely convenient operation.

The present invention relates to a photoelectric dynamic detection device for fluid and its application in contamination test. Said device includes two portions of fluid measuring chamber whose two ends are equipped with light transmission window respectively and optical measurement system. The optical measurement system includes light source, chopper, lens, filter, optical sensor and signal amplifier. It is characterized by that two ends of said fluid measuring chamber are respectively equipped with a buffer chamber, on every buffer chamber a clean fluid inlet is set respectively, two ends of fluid measuring chamber are respectively equipped with a clean fluid and a detected fluid outlets, between two outlets a detected fluid inlet is set.

Provided is an internet of things water meter. The water supply measurement function of the water meter belongs to the water meter, and the charge management function belongs to a circuit; a valve which can be automatically switched off without power is installed in a mechanical water meter, an internet of things communication control circuit is overlaid on the mechanical water meter, and a center management computer is used for conducting centralized information management on dispersed water supply through a communication network and an internet of things network; by means of each water supply unit mechanical switch charging status generated through mechanical detection measurement of the water meter, energizing is conduced immediately and instantaneously, and after charging is confirmed through internet of things interactive communication and data exchange, a new round of water supply is conducted; after warning is conducted when the water supply condition is not met and charged water capacity continuous to be completely supplied, the valve in the water meter is automatically switched off without power; management, control and charging all meet the uniform measurement reading conforming to the legislative purpose of the measurement law; internet of things closed-loop payment switching of electronic money and physical commodities is achieved; the major illegal current situations that existing electronic water meters adopt double measurement, double control and double display, and the whole industry violates the national measurement law in a large scale are thoroughly changed.

The invention relates to a horizontal automobile wrapping machine for a fishing rod. The horizontal automobile wrapping machine comprises a controller, a chuck device, a tape transport device, a tape releasing device, a chuck revolution speed transducer and a tensile force transducer. The controller synchronously controls speeds of a tape transport motor according to the chuck revolution speed and the set tape distance, the controller compares a feedback quantity of the tension force transducer with a set tension force, and a tape collecting magnetic powder brake is adjusted according to an error so that the when the diameter of a tape disc is reduced gradually, the tension force of a collecting tape is reduced, and the constant tension force is guaranteed for wrapping tapes. The controller is a digital controller, a processor circuit, a key input circuit and a display circuit are installed in the controller, parameters of the tape distance, the tension force and the like are input and memorized through keys, the chuck revolution speed and the tension force are real-timely displayed, the controller is concentratedly placed into an electric box and fixed on the tape transport device, and moves with the tape transport device in the process of wrapping. The horizontal automobile wrapping machine for the fishing rod has the advantages of being accurate in the tape distance, uniform in the tension force, simple in operation, high in reliability and low in system costs.

An internet of things intelligent gas meter is characterized in that a sole code is provided for each gas meter, a center management computer performs integrated information management through a mobile information communication network, an internet of things and an intelligent card network offline terminal, the due charge state of each gas supply unit is measured by mechanical detection of the gas meter, new-round gas supply is performed by opening a valve after instant communication and data exchange charge confirmation, integrated information management control of dispersed gas meter gas supply is achieved, an alarm is given when next-round gas supply conditions are not met, the valve in the gas meter is automatically cut off without instructions or power after residual gas is supplied, measured data of the gas meter are not subjected to A / D (analog to digital) conversion, control is not subjected to D / A (digital to analog) conversion, management and charge only have one type of measured data meeting unified measurement requirements of metrological law legislation objectives, and the major law violation status quo of industry-wide large-scale national metrological law violation of electronic gas meters using mechanical / electronic gas supply data for double measurement, double control and double display is possibly finished.

The invention relates to a device for optimized control over carbon source feeding in a denitrification biofilter process. The device is provided with a denitrification biofilter, a carbon source box, a frequency-conversion carbon source pump, a carbon source flowmeter, a backwashing air pump and a backwashing air inlet valve; the denitrification biofilter is internally provided with an online-water-inlet nitrate sensor, an online-water-inlet dissolved oxygen sensor, an online-water-outlet nitrate sensor, a nitrate determinator, a dissolved oxygen determinator, a process controller, and an industrial personal computer; and a water inlet pipeline is provided with a water inlet pump, a water inlet valve and an online-water inlet flowmeter. A method for optimized control cover the carbon source feeding is characterized by comprising the following steps of: (1) introducing water; (2) processing and judging parameters; (3) processing frequency ft by a frequency converter; (4) preventing excessive feeding of a carbon source; (5) stably running; (6) diagnosing faults; and (7) performing backwashing. The device and the method disclosed by the invention can be widely applied to sewage advanced treatment and nitrogenous industrial wastewater treatment, is particularly suitable for producing high-quality recycled water, have the advantages of complete structure, precision for control, good effect and high efficiency.

The invention discloses an automatic control method for a wet-type electric dust remover of a thermal power generating unit, and the method comprises the following steps: obtaining a dynamic characteristic model through a disturbance test of a wet-type electric dust remover; respectively reading the operation parameters of the unit, the operation parameters of the wet-type electric dust remover and the operation parameters of the pre-stage dry electric dust remover; according to the operation parameters of the dry-type electric dust remover and the operation parameters of the wet-type electric dust remover, calculating a feedforward adjusting instruction for adjusting a secondary current and / or secondary voltage; according to the operation parameters of the unit and the operation parameters of the wet-type electric dust remover, sending out a feedback regulation instruction of secondary current and / or secondary voltage; and according to the feedforward regulation instruction and the feedback regulation instruction, regulating secondary current and / or secondary voltage to realize closed-loop automatic control of the wet-type electric dust remover. The automatic control method has better anti-interference capability and energy-saving effect, and can realize closed-loop automatic control of the wet-type electric dust remover.

The invention discloses a smart card gas meter. The gas supply metering function is achieved by a gas meter, and the charging management function is achieved by a circuit. A valve capable of being automatically switched off without power is installed in the mechanical gas meter, and the code type smart card circuit is superposed on the mechanical gas meter. In the gas supply process, the mechanical switch charging state per metered gas supply unit is mechanically detected through the gas meter, instantaneous electrification is carried out, and after charging is confirmed through smart card interactive communication and data exchange, a new round of gas supply is carried out; when conditions of a new round of gas supply are not met, after a charged quantity of gas supply is completed, the valve in the gas meter is automatically switched off without a power supply. Uniform metering readings conforming to the purpose of legislation of the metrological law are available for management, control and charging; tiered gas pricing can be conveniently carried out; closed-loop payment exchange between electronic currency and physical goods is achieved; the serious illegal status that the entire industry violates the national metrological law on a large scale in mechanical / electronic dual metering, dual control and dual display brought by a traditional non-electricity measurement technology to existing smart card gas meters is thoroughly eliminated.

The invention discloses a temperature control method for a preheating type anti-freezing system of a wet cooling tower. The temperature control method is used for controlling an air inlet shutter typeair door and a water inlet regulating valve of a preheater of the preheating type anti-freezing system and ensuring that the temperature of cooling water drained out of the tower is the lowest on thepremise of freezing prevention of the cooling tower. The control system comprises a shutter type adjusting air door, an air door executing mechanism, a water inlet adjusting valve, a valve executingmechanism, a PLC, an environment temperature sensor, a tower inlet and outlet water temperature sensor, a preheating air temperature sensor, an outlet water temperature sensor and an air preheater. The temperature control comprises combined control over the preheating air temperature, the preheater water outlet temperature and the cooling tower water outlet temperature, and the control process iscontinuous temperature control based on meteorological condition changes and unit load changes. According to the temperature control method, the operation states of the preheater and the cooling towercan be effectively monitored, and the closed-loop automatic control of the preheating air temperature and the tower outlet water temperature can be realized.

The invention provides a visual simulation test system for gas-liquid two-phase countercurrent in an abandoned mine goaf, and belongs to the technical field of abandoned mine goaf simulation test systems. The visual simulation test system comprises a simulation device for simulating a fracture network of the abandoned mine goaf, a gas supply system and an automatic water pressure controlling system, wherein the simulation device comprises a transparent observation box and a rock material arranged in the observation box; the gas supply system comprises a gas supply pipe and a gas cylinder for supplying gas to the gas supply pipe; the automatic water pressure controlling system comprises a pressure stabilizing tank, a pressure sensor, a pressure regulating gas cylinder, a water supply tank,a pressure test water pump, a water supply pipe and an electronic controller. The system can be used to simulate the gas-liquid two-phase countercurrent in the fracture network of the abandoned mine goaf, and realize the test of countercurrent visualization to reveal evolution of accumulated water and enrichment of gas in a closed-pit mine during long-term abandonment.

Provided is an internet of things gas meter. The gas supply measurement function of the gas meter belongs to the gas meter, and the charge management function belongs to a circuit; a valve which can be automatically switched off without power is installed in a mechanical gas meter, an internet of things communication control circuit is overlaid on the mechanical gas meter, and a center management computer is used for conducting centralized information management on dispersed gas supply through a communication network and an internet of things network; by means of each gas supply unit mechanical switch charging status generated through mechanical detection measurement of the gas meter, energizing is conduced immediately and instantaneously, and after charging is confirmed through internet of things interactive communication and data exchange, a new round of gas supply is conducted; after warning is conducted when the gas supply condition is not met and charged gas capacity continuous to be completely supplied, the valve in the gas meter is automatically switched off without power; management, control and charging all meet the uniform measurement reading conforming to the legislative purpose of the measurement law; internet of things closed-loop payment switching of electronic money and physical commodities is achieved; the major illegal current situations that existing electronic gas meters adopt double measurement, double control and double display, and the whole industry violates the national measurement law in a large scale are thoroughly changed.

The invention provides a three-dimensional similarity simulation test system for gas-liquid counterflow in the goaf area of ​​an abandoned mine, which belongs to the technical field of simulation test systems for the goaf area of ​​an abandoned mine. It includes a three-dimensional similarity simulation for simulating a similar environment of gas-liquid counterflow in the goaf area of ​​an abandoned mine. device, gas supply system, hydraulic automatic control system and hydraulic loading system; the three-dimensional similar simulation device includes a reaction frame and a three-dimensional similar simulation cavity; the reaction frame includes a beam, a base and a column connecting the beam and the base; a three-dimensional similar simulation cavity The body is installed in the reaction frame. This system can be used to perform similar simulations of gas-liquid counterflow in the goaf area of ​​abandoned mines to study the evolution of water accumulation and gas enrichment in closed mines during the long-term abandonment process, as well as the two-phase migration of gas and water-gas-liquid in high-gas abandoned mines. laws of evolution.

The invention relates to the technical field of mine preparation equipment, in particular to an attapulgite digital intelligent high-temperature drying roller which comprises a cement supporting table, a composite roller, an electromagnetic induction wire frame, a first riding wheel set, a second riding wheel set, a driving motor, a control cabinet and an infrared temperature sensor. The second end of the composite roller is provided with a discharging port and a smoke dust moisture removal outlet, the first end of the composite roller is supported on the cement supporting table through a first supporting wheel set, and the second end of the composite roller is supported on the cement supporting table through a second supporting wheel set. The electromagnetic induction wire frame sleeves the first end, the middle part and the second end of the composite roller, the driving motor is arranged between the first riding wheel group and the second riding wheel group and drives the composite roller to roll, and the infrared temperature sensor is mounted on the electromagnetic induction wire frame and corresponds to the outer surface of the composite roller; the electromagnetic induction wire frame, the driving motor and the infrared temperature sensor are electrically connected to the control cabinet.

The invention relates to a smart card water meter, a functional water meter for metering water and a functional circuit for charge management. A valve capable of automatically closing under power-off state is arranged in a mechanical water meter; a code type smart card circuit is overlapped on the mechanical water meter; in a water supply process, the charging state of a mechanical switch of each water supply unit generated by the mechanical detection metering of the water meter is instantly and immediately powered on, and then a new round of water supply is performed after the charging is confirmed through the smart card interactive communication and data exchange; when the condition of the new round of water supply is not met, the charged water supply volume is supplied till completing, and then the power is not supplied, namely, the valve in the water meter is automatically closed; the management, control and charging all have the uniform metering reading numbers which conform to the purpose of legislation for the metering law; the ladder-like water price can be conveniently implemented; the closed loop payment exchange for the electronic currency and the entity currency can be realized; the mechanical / electronic double-metering, dual control and dual display of the current smart card water meter caused by a traditional non-electricity electric measurement technique and the current situation of large-scale serious violation against national metering law of the whole industry are thoroughly eliminated.

The invention provides a split-type multi-stage ventilated drum fermentation reactor and a fermentation method. The reactor includes a feeding device, a drum and an air intake system. The feeding device is connected to the feeding end of the drum, and the connection is provided with a feed end seal; The drum consists of multiple sections of cylinders connected in sequence. Intermediate sealing devices are provided at the joints of adjacent cylinders. Supporting rollers and driving devices are provided under each section of the cylinders. The centerline of the cylinders is at an angle of <1° to the ground. The inclination angle, the feed end of the drum is at the high point, and the discharge end is at the low point. The air intake system includes the main pipeline and multiple branch pipelines connected with the main pipeline. The connection with the air intake system is provided with a discharge end seal. The invention has the advantages of simple installation and debugging, saving motor energy consumption, small area occupied by equipment, and reasonable air supply, and can be widely used in fermentation composting or biological drying treatment of various solid wastes containing a large amount of organic matter.

The invention discloses a temperature control method for a preheating antifreeze system of a wet cooling tower, which is used for the control of the preheater air intake louver type damper and the water intake regulating valve of the preheating antifreeze system, so as to ensure the cooling tower under the premise of antifreezing. The tower cooling water temperature is the lowest. The control system includes: shutter-type damper, damper actuator, water inlet regulating valve, valve actuator, PLC controller, ambient temperature sensor, water temperature sensor entering and leaving the tower, preheating air temperature sensor, outlet water temperature sensor, and air preheater. Temperature control includes combined control of preheating air temperature, preheater outlet water temperature, and cooling tower outlet water temperature. The control process is continuous temperature control based on changes in meteorological conditions and unit load. The invention can not only effectively monitor the running state of the preheater and the cooling tower, but also realize the closed-loop automatic control of the preheating air temperature and the temperature of the water coming out of the tower.

The invention relates to the technical field of oriented silicon steel production and manufacturing, in particular to a straightening system for improving the plate shape of an oriented steel finished product and a control method thereof. According to the straightening system for improving the plate shape of the oriented steel finished product, a variable frequency motor, an absolute value encoder, a straightening roll, a deformation detection device and a temperature sensor are matched, so that a preheating furnace outlet steel strip plate and the rolling reduction of the straightening roll can be accurately controlled, and the buckling defect of an oriented steel strip is effectively eliminated; the straightening device and the deviation correcting device are integrally arranged, so that steel belt deviation caused by pressing of a straightening roller can be corrected in real time, and the trafficability of the steel belt is improved; the straightening device is arranged in the area outside the furnace, and the cleaning device is arranged, so that the roller surface states of the deviation rectifying roller and the straightening roller can be conveniently monitored and cleaned, and the capability of stable production on site is improved; the control method is provided, the working efficiency of the straightening system can be effectively improved, and closed-loop automatic control over the straightening system is achieved.