CN102371213A - Continuous type constant-temperature and constant-flow dosing method and device - Google Patents

Abstract

The invention discloses a continuous method and device for adding medicine at constant temperature and flow rate. The medicine is passed through a cylinder with a double-layer structure, and the continuous operation of medicine mixing and dosing is realized through the way of mixing medicine in the upper layer and adding medicine in the lower layer; and The working parameters in the mixing and dosing process are collected by sensors, and then sent to the single-chip microcomputer for processing. After the single-chip microcomputer processes the collected working parameters, it sends corresponding control instructions to adjust the working parameters to achieve constant temperature and constant flow. Dosing. The present invention adopts the cylinder body of layered structure to make the drug mixing and dosing process of flotation form a continuous integrated process, and sensors for collecting working parameters and devices for specifically adjusting working parameters are arranged in the cylinder body, and they are The neuro-fuzzy adaptive control system is formed through the linkage control of the single-chip microcomputer, which makes the control of the working parameters of the device more stable and more accurate, and can effectively ensure the constant temperature of the mixed medicine and the constant flow effect of the dosing.

Description

Continuous constant temperature and constant flow drug dosing method and device

technical field

The invention relates to a flotation dosing method and device, in particular to a continuous constant temperature and constant flow dosing method and device.

Background technique

In the process of flotation operation, flotation dosing directly affects the flotation index. Each chemical has its own optimum temperature range. If the temperature of the chemical solution exceeds this range, the best effect will be lost. The constant temperature control and constant liquid level control of the reagents are the key issues in the flotation dosing operation. The control requirements are: the mixing and dosing links of the reagents must maintain a constant temperature, and the liquid level must be kept constant during the dosing process. Keeping at a constant value, humanized adjustment of parameters in the dosing process, clear display, no need for a host computer, and energy saving. In the traditional constant temperature control dosing system, the heating is point heating, the controllable range is small, and the error is large. At present, the temperature control system accuracy at home and abroad is not high, generally between [-1°C, +1°C]. In the traditional flotation agent temperature control method, the mixing and dosing process is relatively independent, and double heating is required, and the unit heat dissipation The area is large, the effect of constant temperature is poor, the energy consumption of constant temperature is large, and the temperature of the medicine cannot reach its optimum temperature range; The constant pressure outflow and steady flow during the dosing are not ideal, and the dosing amount cannot be controlled with high precision, which has a great impact on the fluctuation of the flotation index, and the control requirements can no longer be met, and the control accuracy is relatively low.

Contents of the invention

The technical problem to be solved by the present invention is to provide a continuous constant temperature and constant flow dosing method and device, which integrates the mixing and dosing process in the flotation operation, and has an ideal constant temperature effect, which can ensure constant flow rate during the dosing process. The pressure is stable and the outflow is to overcome the deficiencies of the prior art.

The present invention is achieved in the following way: the continuous constant temperature and constant flow medicine dosing method, the medicine is passed through the double-layer structure cylinder, and the continuous operation of medicine mixing and dosing is realized by the way of mixing medicine in the upper layer and adding medicine in the lower layer; and through The sensor collects the working parameters in the process of drug mixing and dosing, and then sends them to the single-chip microcomputer for processing. After the single-chip microcomputer processes the collected working parameters, it sends out corresponding control instructions to adjust the working parameters to achieve constant temperature and constant flow. medicine.

The working parameters in the mixing and dosing process collected by the sensor include the temperature of the mixing medicine, the liquid level of the mixing medicine, the water level of the mixing medicine and the dosage of the medicine.

Continuous constant temperature and constant flow dosing device, including a cylinder, the cylinder is a double-layer structure with upper and lower layers, the upper layer is a drug mixing layer, the lower layer is a dosing layer, and the top of the cylinder is equipped with a top cover and a dosing device. And the water inlet, a stirrer, a temperature sensor, a water level sensor, a liquid level transmitter and a coil heater are arranged in the drug mixing layer; a solenoid valve switch is arranged between the drug mixing layer and the separation section of the drug adding layer; A solenoid valve dosing port and a constant pressure tube are provided on the outer wall of the dosing layer; a console is provided outside the cylinder, and all components installed on the cylinder are connected to the console.

The console consists of a single-chip microcomputer, which is connected with a touch screen display module, a lightning protection module, a key module, an A/D input conversion module, a D/A output conversion module, a power supply module and a clock module; a temperature sensor, a water level sensor, a liquid The position transmitter and the electromagnetic relay of the solenoid valve dosing port are connected to the single-chip microcomputer through the A/D input conversion module; the dosing device, the water filling port, the coil heater and the solenoid valve switch are connected to the single-chip microcomputer through the D/A output conversion module.

The temperature sensor is an armored PT100 temperature sensor. Armored PT100 temperature sensor is integrally drawn from resistor body, lead wire, insulating magnesium oxide and protective tube. It has high temperature measurement accuracy, fast measurement speed, fast response to temperature, good shock resistance, wide temperature measurement, and can Bending into the required shape and other characteristics.

The coil heater is at the bottom of the drug mixing layer, the vertical distance between the water level sensor and the top of the coil heater is 20cm, and the vertical distance between the liquid level transmitter and the bottom of the drug mixing layer is 10cm. When the liquid level transmitter detects that the liquid level has dropped to this point, it will feed back the information to the single chip microcomputer, and the system will automatically start the next mixing process; when the water level reaches the sensor, the sensor will turn on the signal and transmit it to the console, then turn on the power supply of the heating tube and Stop calling the police. On the contrary, when the water in the container leaves the sensor, the signal is interrupted, and the console cuts off the power supply of the heater. Even if the thermal protection accessories fail, the electric heater cannot heat. Simultaneously, the alarm notifies the user, so as to achieve real anti-dry heating. The device has high sensitivity and good safety performance.

The agitator is an inverted conical double-helix screw agitator. The inverted conical double-helix screw type agitator is made of stainless steel, and the inverted conical double-helix structure has good shear performance, so that the center part of the mixed drug layer can generate a strong upward flow, and the inner wall of the mixed drug layer produces a circular downward flow, forming an up and down flow. Circulating flow makes the stirring effect more ideal, suitable for the high viscosity of flotation and the occasions where baffles are not required.

A heat insulating layer is provided in the cylinder wall of the cylinder. The inner and outer layers of the cylinder can be vacuum interlayer structure, and foam can be added in the interlayer to assist in heat preservation. It can also insulate the mixture layer and the dosing layer, and prevent the temperature from being too high. The plastic deformation of the cylinder has a good effect of heat preservation and support, low heat dissipation and low energy consumption.

There are more than 4 injection ports of the solenoid valve.

The parameters related to the output current of the controllable power supply of the coil heater can be set by the user according to the needs. It is an adjustable power supply with high controllability and high precision. The way of changing the output current is to realize the rapid heating of the steps, and the whole system detection and heating are integrated. The coil heating is uniform and the heating speed is fast. Using the self-adaptive fuzzy principle to carry out intelligent and humanized control through the single-chip microcomputer and controllable power supply to realize cascade rapid heating and constant temperature heating, energy saving, high controllability, and overall process. made great progress.

Single-chip microcomputer module : The single-chip microcomputer module adopts the MC9S12XS128MAA single-chip microcomputer chip provided by Freescale with superior performance, and is packaged in 80-pin LQFP chip. It is characterized by its own 12-bit analog-to-digital conversion, its own watchdog circuit, and the conductivity type is bipolar Type, the working temperature is between -40°C and 80°C, and can work in a humid environment. The single-chip microcomputer module is the core module of the system, which mainly coordinates and drives the work of each module.

A/D input conversion module : DAC0832 dual-integral analog-to-digital conversion chip is selected, with high conversion precision, mainly to convert the analog signal during temperature collection into digital signal, and then send it to the single-chip memory for storage and analysis.

D/A output conversion module : ACL7315 module is selected, mainly to convert the digital signal sent by the single-chip microcomputer into an analog signal, and drive the coil heater to work.

124.5（mm）压电式触摸液晶显示屏，主要显示运行过程的状态数据，并实现人性化的触摸动作指令，其显示任务有启动并设置温度、启动并设置加药量、显示加药温度曲线1、显示加药温度曲线2、显示实时数据、显示帮助等。显示分为4个区域，左上角显示各功能模块的原理及原理图，右上区域显示设置值和状态值，左下区域为显示内容，右下区域为键盘。高效节能梯级恒温控制加药装置控制器触摸屏部分显示页面内容见图3。 Touch screen display module : the display module uses 221.4

124.5 (mm) piezoelectric touch LCD display, which mainly displays the status data of the operation process, and realizes humanized touch action instructions. Its display tasks include starting and setting temperature, starting and setting dosing amount, and displaying dosing temperature curve 1. Display the dosing temperature curve 2. Display real-time data, display help, etc. The display is divided into 4 areas, the upper left corner displays the principle and schematic diagram of each functional module, the upper right area displays the setting value and status value, the lower left area is the display content, and the lower right area is the keyboard. See Figure 3 for the contents of the display page on the touch screen of the controller of the high-efficiency and energy-saving cascade constant temperature control dosing device.

Power supply module: The power supply is 220V mains power supply. The power supply module is composed of two parts, one part is 9V DC power supply, which is composed of a slot and a baffle plate. It is obtained from 220V power supply through transformer filtering and supplied to the microcontroller module; the other part is 220V The AC power supply is composed of a power cord and a plug. The plug is directly inserted into the civilian 220V power supply to directly supply the heating module.

Clock module: The clock module mainly realizes the timing of temperature cycle detection and timing of dosing control.

Key module: The key module has detection accuracy setting buttons, system start and stop buttons, etc.

The following problems usually exist in the devices of the prior art: first, the single-chip microcomputer module is not provided with a lightning protection and anti-interference shielding module, because there are many channels for detection and heating, frequent transmission and long-distance transmission of signals between circuits, resulting in Each channel is greatly disturbed by the external environment; second, the control system is huge, and it can only work after being connected to the computer host and other related components, and cannot be moved at will, the stirring is not sufficient, and the overall temperature is not uniform enough; third, the heating power is up to Less than the requirements, the heating speed is slow and cannot be adjusted, the power consumption is large, and the cascade rapid heating and constant temperature control cannot be realized.

Due to the adoption of the above-mentioned technical scheme, compared with the prior art, the present invention adopts a layered cylinder body to make the drug mixing and dosing process of flotation form a continuous integrated process, and is provided in the cylinder body for Sensors that collect working parameters and devices that specifically adjust working parameters are linked and controlled by a single-chip microcomputer to form a neuro-fuzzy adaptive control system, so that the stability of the control of the working parameters of the device is better, the control accuracy is higher, and it can be effectively Ensure the constant temperature of the mixed medicine and the constant flow effect of the dosing. The method of the invention is simple and easy to implement, the cost of the device used is low, and the use effect is ideal.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a structural schematic diagram of the console of the present invention.

Detailed ways

Embodiment of the present invention: a continuous constant temperature and constant flow drug dosing method, the drug is passed through the double-layer structure of the cylinder, and the continuous operation of drug mixing and drug dosing is realized through the upper layer of drug mixing and the lower layer of drug addition; and through the sensor Collect the working parameters during the mixing and dosing process, and then send them to the single-chip microcomputer for processing. After the single-chip microcomputer processes the collected working parameters, it sends out corresponding control instructions to adjust the working parameters to achieve constant temperature and constant flow. .

The working parameters in the mixing and dosing process collected by the sensor include the temperature of the mixing medicine, the liquid level of the mixing medicine, the water level of the mixing medicine and the dosage of the medicine.

The structure of the continuous constant temperature and constant flow drug dosing device is shown in Figure 1, including a cylinder 1, which is a double-layer structure with upper and lower layers, the upper layer is a drug mixing layer 17, and the lower layer is a drug dosing layer 18; The cylinder wall of the body 1 is provided with a heat insulation layer 20 (the heat insulation layer 20 adopts a structure in which the inner and outer layers are vacuum interlayers, and foam is added to the interlayer); The water port 4 is provided with an agitator 19, a temperature sensor 5, a water level sensor 6, a liquid level transmitter 7 and a coil heater 8 in the drug mixing layer 17; A solenoid valve switch 9 is arranged between them; a constant pressure tube 23 and 4 symmetrically distributed solenoid valve dosing ports 10 are arranged on the outer wall of the dosing layer 18; Each part installed is all connected with console 11; Console 11 forms and comprises single-chip microcomputer 12, is connected with touch-screen display module 13, button module 14, A/D input conversion module 15, A/D output conversion module 16, Power supply module 21 and clock module 22; The electromagnetic relay of temperature sensor 5, water level sensor 6, liquid level transmitter 7 and electromagnetic valve dosing port 10 is connected with single-chip microcomputer 12 through A/D input conversion module 15; Dosing device 3, The water inlet 4, the coil heater 8 and the solenoid valve switch 9 are connected to the single-chip microcomputer 12 through the A/D output conversion module 16; the temperature sensor 5 adopts an armored PT100 temperature sensor; The vertical distance between the water level sensor 6 and the top of the coil heater 8 is 20 cm, and the vertical distance between the liquid level transmitter 7 and the bottom of the drug mixing layer 17 is 10 cm. The agitator 19 adopts an inverted conical double-helix screw agitator.

During use, the device is installed, and when flotation and dosing are to be performed, set the dosing amount (the dosing concentration is constant) on the touch screen display on the console 11, unscrew the cover of the dosing device 3, and the control system realizes Dosing is automatic, and at the same time, the switch of the water filling port 4 is automatically opened to start adding water, and when the corresponding liquid level is reached, the console 11 automatically stops adding water. Simultaneously, the console 11 starts the coil heater 8, and by being connected with the controllable power supply, it can be switched on and off instantly to adjust the timely heating speed of the coil heater 8, and the single-chip microcomputer 12 embedded in the console 11 is used to design a program in keilC51 language to realize automation Control to achieve the purpose of intelligent cascade rapid heating. While heating, the agitator 19 is also started. The agitator 19 has good shear performance and can form an up and down circulation flow in the drug mixing layer 17, so that the stirring effect is uniform and the temperature is balanced; the armored PT100 stainless steel sensor 5 detects the mixed drug synchronously. The average temperature in layer 17 has high sensitivity, fast response, wide temperature measurement range and good sensing effect.

During the flotation dosing process, the temperature of each channel works according to the set value. If the detected temperature exceeds the given temperature range, the intelligent step-by-step rapid heating will be implemented; if the detected temperature does not exceed the given temperature range, the current temperature will be maintained. . When the actual value exceeds the given range, increase the output current of the controllable power supply, and the heating speed will be faster; when the actual value exceeds the given range, the output current of the controllable power supply will be small, and the heating speed will be relatively slow; When within a given temperature range, the current temperature is maintained.

After the medicine is mixed, the console 11 opens the electromagnetic valve switch 9 connecting the medicine mixing layer 17 and the medicine adding layer 18, and the medicine enters the medicine adding layer 18 from the medicine mixed layer 17 until reaching a constant height. The constant pressure tube 21 connects the dosing layer 18 with the atmosphere. When the dosing is to be performed, the console 11 controls the opening of the solenoid valve dosing port 10, and the console 11 keeps the dosing amount of the dosing layer 17 entering the dosing layer 18. It is equal to the dosing amount of all the solenoid valve dosing ports 10, so that the outflow from small holes becomes constant pressure and constant outflow when dosing. When the height of the medicine in the medicine mixing layer 17 drops to a certain height, the liquid level transmitter 7 transmits a signal to the single-chip microcomputer 12 to implement the next round of medicine mixing. Main technical indicators: the controllable temperature range is 0～100℃; the temperature control accuracy is ±0.3℃; the power supply is AC 220V; the maximum design power is 2000W and the allowable current is 15A.

Claims (9)

1. a continous way constant-temperature constant-current amount adding method thereof is characterized in that: medicine through in the double-deck cylindrical shell, is realized mixing the continous way operation of medicine, dosing through the mode of the mixed medicine in upper strata, lower floor's dosing; And through the running parameter in mixed medicine of sensor acquisition and the dosing process; Send in the single-chip microcomputer then and handle; After single-chip microcomputer is handled the running parameter that collects, send the control corresponding instruction running parameter is adjusted, to realize constant temperature, the dosing of constant current amount.

2. continous way constant-temperature constant-current amount adding method thereof according to claim 1 is characterized in that: the mixed medicine of sensor acquisition and the running parameter in the dosing process comprise the height of water level of the liquid level that mixes the medicine temperature, mixes medicine, mixed medicine and add dose.

3. continous way constant-temperature constant-current amount chemicals dosing plant; Comprise cylindrical shell (1); It is characterized in that: cylindrical shell (1) is the double-decker of last lower leaf, and its upper strata is for mixing medicine layer (17), and lower floor is dosing layer (18); Be provided with top cover (2), doser (3) and filler (4) at the top of cylindrical shell (1), in mixed medicine layer (17), be provided with agitator (19), temperature sensor (5), level sensor (6), fluid level transmitter (7) and spiral heater (8); Between the compartmented that mixes medicine layer (17) and dosing layer (18), be provided with electromagnetic valve switch (9); On the outer wall of dosing layer (18), be provided with magnetic valve dosing mouth (10) and constant voltage pipe (23); Be provided with console (11) in cylindrical shell (1) outside, cylindrical shell (1) is gone up each parts of installing and all is connected with console (11).

4. continous way constant-temperature constant-current amount chemicals dosing plant according to claim 3; It is characterized in that: console (11) is formed and to be comprised single-chip microcomputer (12), on single-chip microcomputer (12), is connected with touch-screen display module (13), key-press module (14), A/D input modular converter (15), D/A and exports modular converter (16), power module (21) and clock module (22); The electromagnetic relay of temperature sensor (5), level sensor (6), fluid level transmitter (7) and magnetic valve dosing mouth (10) is connected with single-chip microcomputer (12) through A/D input modular converter (15); Doser (3), filler (4), spiral heater (8) and electromagnetic valve switch (9) are connected with single-chip microcomputer (12) through D/A output modular converter (16).

5. according to claim 3 or 4 described continous way constant-temperature constant-current amount chemicals dosing plants, it is characterized in that: temperature sensor (5) is an armored PT100 temperature sensor.

6. continous way constant-temperature constant-current amount chemicals dosing plant according to claim 3; It is characterized in that: spiral heater (8) is in the bottom of mixing the medicine layer; Level sensor (6) is 20cm with the vertical range at spiral heater (8) top, and fluid level transmitter (7) is 10cm with the vertical range of mixed medicine layer (17) bottom.

7. continous way constant-temperature constant-current amount chemicals dosing plant according to claim 3 is characterized in that: agitator (19) is the tapered double helix screw of a rounding agitator.

8. continous way constant-temperature constant-current amount chemicals dosing plant according to claim 3 is characterized in that: in the barrel of cylindrical shell (1), be provided with thermal insulation layer (20).

9. continous way constant-temperature constant-current amount chemicals dosing plant according to claim 3, it is characterized in that: magnetic valve dosing mouth (10) is more than 4.

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