CN105233530B - Coal slime water deep clarification system, and treatment method thereof - Google Patents

Abstract

The invention discloses a coal slime water deep clarification system and its treatment process, which includes a thickener, and also includes the following components: an online concentration monitoring system in the thickener, the system includes a correction part and a concentration online detection part in the thickener; Dosing system, the automatic dosing system includes coal slime water feeding detection unit, monitoring operation unit, and medicine adding unit; medicine dispersion system, which includes double-impeller heating and high-efficiency preparation barrels connected to the medicine adding unit and medicine adding There are two outlets at the bottom of the buffer tank for chemical addition, which lead to the constant-quantity dosing channel and the variable-dosing dosing channel respectively; the medicines in the constant-quantity dosing channel and the variable dosing channel are all imported into the slime water feeding pipe ; The online concentration monitoring system in the concentrator, the automatic dosing system for coal slime water, and the dispersing system for chemicals are all electrically connected to the control system. The coal slime water depth clarification system of the present invention can be monitored and corrected in real time, saves the dose of medicine, and has a more perfect system.

Description

A deep clarification system for coal slime water and its treatment process

technical field

The invention belongs to the technical field of coal preparation, and in particular relates to a coal slime water deep clarification system and a treatment process thereof.

Background technique

Coal slime water treatment is one of the most important links in all coal preparation plants except dry selection. The quality and perfection of the slime water treatment process directly affects whether the production of the coal preparation plant can go smoothly. It is one of the most important factors to evaluate the technology and management level of a coal preparation plant. The quality of the slime water treatment effect even affects Determine the economic and social benefits of a mining area. The coal slime water system is responsible for recovering coal slime and water resources, and its ultimate goal is to meet environmental protection requirements and realize a closed-circuit washing water cycle.

In the treatment of slime water, technicians usually add coagulant and flocculant directly to the feeding pipeline in front of the thickener according to the concentration distribution of the material layer in the thickener, so as to achieve the purpose of faster purification and precipitation of slime water. At present, the most common method at home and abroad is to first detect the thickness of the material layer in the thickener through manual methods (using a "slime probe", a long rod with a scale on it to detect the thickness of the bed in the thickener). Judging by experience whether adding coagulant and flocculant dosage will increase or decrease.

In the prior art, the more advanced automatic dosing method at home and abroad is the "flocculant automatic adding system and method thereof" disclosed in the Chinese patent document CN1958116A, which detects the concentration and flow of the slime water according to the concentration meter and the flow meter, and is controlled by the industrial computer. The pump is controlled to add flocculant, the sensor detects the concentration of overflow water, and then the industrial computer judges the concentration of overflow water to decide whether to start the pump to add medicine to the concentration tank; this system and method saves the amount of flocculant and improves the clean coal production rate, but There are the following problems, which lead to its not being popularized and used in coal preparation plants: (1) The system is not perfect, only provides an automatic dosing method, and does not explain how to add chemicals and what means to disperse the chemicals, so as to achieve deep clarification of slime water and The purpose of saving medicine; (2) The system adopts an open-loop mode, which cannot monitor, feed back and correct the added medicine dosage. During the use process, there is often a deviation between the actual dosage of the medicine added and the set dosage, resulting in Waste of chemicals; (3) Taking the overflow concentration of the concentrator as the only assessment index is inconsistent with the actual situation. In the deep clarification of coal slime water, engineers and technicians usually care about two issues. The first is the concentration distribution of the bed in the concentrator The second is the concentration of overflow water. If you only care about the concentration of overflow water and ignore the changes in the bed layer in the concentrator, and blindly add chemicals, it will cause the phenomenon of "raking" in the concentrator (that is, because the bed layer in the concentrator is too thick, the concentration If it is too large, the rake in circular motion will stop moving, and the material cannot be discharged from the bottom outlet of the thickener), which will seriously affect the normal production of the coal preparation plant.

Therefore, those skilled in the art urgently need to provide a kind of real-time monitoring and correction, more saving medicine dose, more perfect coal slime water depth clarification system.

Contents of the invention

In view of the above disadvantages, the present invention provides a coal slime water deep clarification system and its treatment process which can be monitored and corrected in real time, which saves more dosage and is more perfect.

Provide a kind of coal slime water deep clarification system for realizing one of above-mentioned purposes, the present invention adopts following technical scheme:

A coal slime water deep clarification system, including a thickener, also includes the following components:

On-line concentration monitoring system in the thickener, the system includes a correction part and an online concentration detection part in the thickener, and the correction part corrects the data of the online concentration detection part in the thickener;

Coal slime water automatic dosing system, the automatic dosing system includes coal slime water feeding detection unit, monitoring operation unit, and medicament adding unit sequentially connected successively; The signal output ends are all connected to the monitoring operation unit, and the command transmission end of the monitoring operation unit is connected to the medicament adding unit;

Chemical dispersing system, the system includes double-impeller heating high-efficiency preparation barrel and chemical adding buffer barrel connected to the chemical adding unit. A constant-flow drug flowmeter and multiple jet nozzles form a constant-quantity dosing channel, and another diaphragm-type metering pump, variable-quantity drug flowmeter, and jet nozzles form a variable-dosing channel; into the coal slime water feeding pipe, and the direction of the jet nozzle is consistent with the feeding direction of the coal slime water feeding pipe;

The control system composed of PLC, the online concentration monitoring system in the concentrator, the automatic dosing system of coal slime water, and the dispersing system of chemicals are all electrically connected to the control system.

Preferably, the correction part is set as an intelligent concentration pot for sampling the material in the concentrator and quickly detects the concentration; the online concentration detection part in the concentrator is set as a density detector in the concentrator.

Further, the intelligent concentration pot includes a cube-shaped outer shell and a cylindrical inner tank arranged in the outer shell as a collection of slime water; the upper part of the outer shell is provided with a card slot, the middle part is provided with a handle fixing device and an inner tank bracket, Both the card slot and the inner tank bracket are used to fix the inner tank, the lower section is fixed with a display, and the bottom of the sealed space surrounded by the outer shell and the inner tank is also fixed with a sensor, and the upper and lower sides of the sensor are respectively equipped with upper and lower support plates , and the left and right sides of the upper and lower support plates are respectively provided with upper and lower support plate baffles; the sensor is connected to the display, and in the working state, the sensor converts the collected weight signal into the concentration of slime water and displays it on the display ;

The density detector in the concentrator is set as a test device in which a plurality of pressure transmitters are evenly distributed vertically and fixed in a sealed container, and the voltage output signals of the pressure transmitters are collected by a data acquisition card.

Further, the pressure transmitter adopts diffused silicon type pressure transmitter; the data acquisition card adopts MPS-010602 multifunctional USB signal acquisition card.

Further, the coal slime water feeding detection unit is set as an electromagnetic flowmeter and a differential pressure concentration meter, which are respectively used to detect the pulp flow and pulp concentration of the feed pipe of the thickener, and the monitoring operation unit includes PLC and PLC The touch screen is electrically connected, and the medicament adding unit includes a metering pump.

Further, the dual-impeller heating and high-efficiency preparation barrel includes a double-impeller agitator fixed on the upper end of the central axis of the barrel, a sleeve is fixed on the periphery of the double-impeller agitator, and the central axis of the sleeve coincides with the central axis of the mixing barrel; The sleeve is provided with a first circulation hole, and the double-impeller agitator is provided with a second circulation hole on the upper impeller, and the first circulation hole and the second circulation hole cooperate with the lower impeller to form a circulation loop inside the mixing tank. Turbulent flow field; multiple resistance heating coils are evenly arranged on the inner wall of the double-impeller heating and high-efficiency preparation barrel; multiple viscosity detection probes evenly distributed in the barrel are installed in the double-impeller heating and high-efficiency preparation barrel. The viscosity detection probe is electrically connected to the monitoring operation unit;

A liquid level sensor I and a multi-rod impeller stirrer are installed in the rod impeller stirring buffer barrel, and the liquid level sensor I is electrically connected to the PLC.

Further, the drug buffer tank is designed with a liquid level sensor II electrically connected to the PLC, and adjusts the flow of the drug by controlling the opening degree of the electric gate valve correspondingly through the data of the constant flow drug flowmeter, and then controls the liquid level at the set value. fixed interval.

Further, a plurality of jet nozzles are installed on the central axis of the feed pipe of the concentrator towards the same direction; and at the downstream of the jet nozzle, a pipe for fully mixing the medicament and the coal slime water is also installed on the pipeline of the feed pipe of the concentrator. device.

Further, the pipeline mixer is set as multiple groups of liquid mixing units installed in the pipeline, and each mixing unit is composed of a plurality of fixed blades intersecting at a specified angle.

Further, the temperature of the medicine solution is controlled at 40 to 50°C by means of a resistance heating coil in the high-efficiency preparation barrel with double impellers.

Two of the object of the present invention is to provide a kind of processing technology of above-mentioned coal slime water deep clarification system, specifically comprise following operation:

S1. In the concentration online monitoring system of the concentrator, the density detector inside the concentrator detects the change of the material layer in the concentrator in real time, completes the data collection, draws the concentration or density contour line and cloud map in the concentrator through the calculation software, and displays the inside of the concentrator Concentration state, when the concentration exceeds the limit, an alarm is issued to adjust the dosing amount of the concentrator; at the same time, after sampling and monitoring through the smart concentration pot during the online monitoring process, regular maintenance and data correction of the concentration online monitoring system in the concentrator are carried out;

S2. After the concentration in the concentrator is transmitted to the automatic dosing system of coal slime water in real time, the coal slime water feeding detection unit first detects the slurry flow rate and slurry concentration of the thickener feeding pipe through the electromagnetic flowmeter and differential pressure concentration meter, and the data The signal is transmitted to the PLC, the flow rate is multiplied by the concentration to calculate the total amount of dry slime, and various data are displayed on the touch screen;

The dispatcher sets the control parameters on the touch screen according to the displayed data, and then the PLC calculates the dosage of the medicine according to the set parameters and the collected data signals;

S3. After setting the dosage of the medicine, the medicine is added to the high-efficiency preparation barrel with double impellers in the medicine dispersion system to form a circular turbulent flow field, and the medicine is quickly stirred and dissolved at 40 to 50°C, such as the data of multiple viscosity detection probes All meet the set value, that is, turn on the feeding pump to output the solution to the bar impeller stirring buffer barrel, and the liquid level sensor Ⅰ detects the material liquid level in the barrel until the liquid level meets the requirements; the multi-rod impeller agitator rotates at a low speed to maintain the The state of the prepared flocculant;

S4. The pumps of the two outlets at the bottom of the chemical buffer tank are turned on, and the solution of one of the outlets goes to the constant dosing channel, and the flow of the medicine is adjusted by the opening degree of the electric gate valve, and the solution of the other outlet goes to the variable dosing channel The chemicals in the two dosing channels are all sprayed out through the jet nozzle, and then fully mixed with the slime water flowing in from the feed pipe of the concentrator through the pipeline mixer, and finally flow into the concentrator.

The beneficial effects of the present invention are:

1) The online concentration monitoring system in the concentrator of the present invention, the automatic dosing system for coal slime water, the dispersion system for chemicals, and the control system cooperate together to form a complete set of deep clarification system for coal slime water, and the processing technology adapted to this system is greatly automated Improve and greatly reduce the input of manpower and material resources. The concentration online monitoring system in the concentrator can monitor the optimal chemical addition amount of the system in real time, feed back to the automatic dosing system of coal slime water, and drive the automatic dosing of the chemical addition unit through PLC, so that Real-time correction; after the quantitative agent from the agent adding unit flows into the agent dispersion system to fully dissolve and disperse, it will be sprayed out in the same direction as the inflow direction of the slime water through the multiple jet nozzles in the two drug dosing channels, and the mixing of the agent and the slime water will be more uniform , thus saving the dose of medicine.

2), the upper and lower sides of the sensor in the smart concentration pot of the present invention are respectively provided with upper and lower support plates, and the left and right sides of the upper and lower support plates are respectively provided with upper and lower support plate baffles, which ensures that Under working conditions, the sensor converts the collected weight signal into the concentration of slime water and displays the reliability of the data on the display;

The smart concentration pot can use the concentration sampling pot to take physical samples of the set points in the concentrator during the production gap. After the rapid detection by the smart concentration pot, the entire test system is calibrated to ensure the accuracy of the concentration detection system in the concentrator. Concentration online detection system detects the change of material layer in the concentrator in real time, completes data collection, draws concentration or density contours and cloud maps in the concentrator through computing software, and provides technical guidance for dosing, feeding and underflow discharge.

3), the Chinese medicine adding unit of the present invention is the final execution link of the coal slime water automatic dosing system, and the system calculates the optimal coagulant and flocculant dosage under this concentration according to the total dry coal slime amount, and passes the metering pump and electric motor valve for dosing. At the same time, according to the actual concentration and flow of slime water and the data information fed back by the concentration detection system in the concentrator, the difference between the dosage of the agent and the amount of the constant dosage is calculated continuously, and it is completed by controlling the diaphragm metering pump of the variable dosage channel, which is beneficial The amount of medicine added is quickly in place, eliminating the hysteresis of medicine addition. After the medicament falls into the dispersing system of the medicament, the electric gate valve in the constant dosage dosing channel generally does not change the opening at will, unless there is a major change in the coal quality, which is conducive to the stability and accuracy of the dosing system. A flowmeter is installed at the discharge pipe of the diaphragm metering pump on the variable dosing channel. Since the metering pump is a rotating device, the wear and tear of its own moving parts may cause errors between the output of the metering pump and the metering over time. Here The link design of the closed-circuit system is conducive to the accuracy and calibration of the metering pump.

4), the mixing tank in the present invention is set as double-impeller heating and high-efficiency preparation tank, compared with the traditional mixing tank, its advantages are: 1. There is a sleeve outside the impeller, and there are circulation holes on the sleeve, which can promote the dissolution of the medicament; 2. The impellers used are double impellers, and the upper impeller also has a circulation hole, which cooperates with the lower impeller to form a proper turbulent flow field; ③The inner wall of the mixing tank is equipped with 2 sets of resistance heating coils, and the temperature of the drug solution is controlled at 40 to 50°C. It is conducive to the rapid dissolution of the medicament and ensures the rapid dissolution of the medicament in winter. ④ There are multiple solution viscosity detection probes installed in the barrel, and the viscosity detection probes are electrically connected to the monitoring operation unit. If the data of multiple viscosity detection probes meet the set value, it means that the solution preparation is completed, and the automatic monitoring of the solution preparation status is realized.

5), a plurality of jet nozzles of the present invention are installed on the central axis of the feed pipe of the concentrator toward the same direction, so that the medicament solution is jetted in a limited space to form a flow core area, a basic flow area, a backflow area, and a pipe flow area. The far downstream area presents the flow characteristics of complete pipe flow, which promotes the uniform mixing of chemicals and slime water, and provides a guarantee for saving the amount of chemicals.

6), the present invention is also equipped with a pipeline mixer on the pipeline of the feed pipe of the thickener at the downstream of the jet nozzle, is that several groups of liquid mixing units are installed in the pipeline, and each mixing unit is composed of a certain number of fixed blades The specified angle cross composition is conducive to the further mixing of the agent and the slime water.

Description of drawings

Fig. 1 is the flowchart of the coal slime water deep clarification system of the present invention.

Fig. 2 is a flowchart of the online concentration monitoring system in the concentrator of the present invention.

Fig. 3 is a flow chart of the automatic dosing system for coal slime water of the present invention.

Fig. 4 is the calculation flow chart of the present invention for the data collected by the density detector inside the concentrator.

Fig. 5 is a schematic diagram of equipment connection of the coal slime water deep clarification system of the present invention.

Fig. 6 is a schematic diagram of the structure of the intelligent concentration pot of the present invention.

Fig. 7 is a schematic diagram of the structure of the density detector inside the concentrator of the present invention.

Fig. 8 is a structural diagram of the double-impeller heat-generating high-efficiency preparation barrel and the rod impeller stirring buffer barrel of the present invention.

Fig. 9 is a schematic diagram of the front view of the jet nozzle in the present invention.

Fig. 10 is a top view of the jet nozzle in the present invention.

The meanings of the marked symbols in the figure are as follows:

A-Concentration online monitoring system in the concentrator A1-Intelligent concentration pot A11-Outer shell

A111-Card Slot A112-Handle Fixing Device A113-Inner Bracket A114-Display

A12-inner tank A13-sensor A131-upper support plate A132-lower support plate

A133-upper support plate baffle A134-lower support plate baffle A2-concentrator internal density detector

A21-Pressure Transmitter

B-Coal slime water automatic dosing system B1-Electromagnetic flowmeter B2-Pressure differential concentration meter

C-Pharmaceutical dispersion system C1-Double impeller heating and high-efficiency preparation barrel C2-Screw pump

C11-double impeller agitator C12-sleeve C120-first circulation hole C13-upper impeller

C130-second circulation hole C14-lower impeller C15-resistance heating coil C16-viscosity detection probe C3-pharmaceutical buffer barrel C30-liquid level sensorⅡ C4-electric gate valve

C5-constant flow agent flowmeter C6-jet nozzle C60-guide vane C7-pipeline mixer

C8-diaphragm metering pump C9-variable pharmaceutical flowmeter

C10-rod impeller stirring buffer barrel C100-liquid level sensor Ⅰ C101-multi-rod impeller agitator D-thickener

detailed description

The technical solutions in the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Embodiment 1. A kind of coal slime water deep clarification system

As shown in Figures 1 to 5, a coal slime water deep clarification system includes a thickener D, and also includes the following components:

Concentration online monitoring system A in the thickener, the system includes a correction part and an online concentration detection part in the thickener, and the correction part corrects the data of the online concentration detection part in the thickener;

Coal slime water automatic dosing system B, this automatic dosing system comprises coal slime water feeding detection unit, monitoring operation unit, medicament adding unit successively successively connected; The data signal output ends are all connected to the monitoring operation unit, and the instruction transmission end of the monitoring operation unit is connected to the medicament adding unit;

Drug dispersing system C, the system includes a connected drug adding unit, a dual-impeller heating and high-efficiency preparation barrel C1 for receiving the drug, and a bar impeller for storing the drug. Drug buffer barrel C3, electric gate valve C4, constant flow drug flow meter C5, and multiple jet nozzles C6 form a constant drug dosing channel, and another diaphragm metering pump C8, variable drug flow meter C9, and jet nozzle C6 form a variable drug dosing channel The medicaments of the constant dosage dosing channel and the variable dosing channel are all merged into the slime water feeding pipe, and the direction of the jet nozzle C6 is consistent with the feeding direction of the coal slime water feeding pipe;

The control system composed of PLC, the online concentration monitoring system in the concentrator, the automatic dosing system of coal slime water, and the dispersing system of chemicals are all electrically connected to the control system.

Wherein, the correction part is set as an intelligent concentration pot A1 for sampling the material in the concentrator and quickly detecting the concentration; the online concentration detection part in the concentrator is set as a density detector A2 in the concentrator.

As shown in Figure 6, the intelligent concentration pot A1 includes a cube-shaped outer shell A11 and a cylindrical inner container A12 arranged in the outer shell as a collection of slime water; The hand fixing device A112 and the inner tank bracket A113, the card slot A111 and the inner tank bracket A113 are all used to fix the inner tank A12, the lower section is fixed with a display A114, and the bottom of the sealed space surrounded by the outer shell A11 and the inner tank A12 is also fixed with a Sensor A13, the upper and lower sides of the sensor A13 are respectively provided with upper and lower support plates A131, A132, and the left and right sides of the upper and lower support plates A131, A132 are respectively provided with upper and lower support plate baffle plates A133, A134; The sensor A13 is connected with the display A114, and the weight signal collected by the sensor A13 is converted into a slime water concentration and displayed on the display A114 in the working state;

As shown in Figure 7, the density detector A2 in the concentrator is set as a test device that a plurality of pressure transmitters A21 are evenly distributed vertically and fixed in the sealed container; the voltage output signal of the pressure transmitter A21 adopts data Acquisition card collection. The data collected by the density detector A2 in the concentrator can be used to draw the concentration or density contours and cloud diagrams in the concentrator through computing software, providing technical guidance for dosing, feeding and underflow discharge. Specifically, the computing software can The data processing flow is shown in Figure 4. The voltage output signal of the pressure transmitter A21 is collected by a data acquisition card.

Among them, the pressure transmitter A21 adopts diffused silicon pressure transmitter; the data acquisition card adopts MPS-010602 multifunctional USB signal acquisition card.

As shown in Figures 1 and 5, the coal slime water feeding detection unit is set as an electromagnetic flowmeter B1 and a differential pressure concentration meter B2, which are respectively used to detect the pulp flow and the pulp concentration of the feed pipe of the thickener, and the monitoring The operation unit includes a PLC and a touch screen electrically connected with the PLC, and the medicament adding unit includes a metering pump.

As shown in Figure 8, the double-impeller heating and high-efficiency preparation barrel C1 includes a double-impeller agitator C11 fixed on the upper end of the central axis of the barrel body, and a sleeve C12 is fixed on the periphery of the double-impeller agitator C11, and the central axis of the sleeve C12 It coincides with the central axis of the mixing bucket; the sleeve C12 is provided with a first circulation hole C120, and the double impeller agitator is provided with a second circulation hole C130 on the upper impeller C13, the first circulation hole C120, the second circulation The hole C130 cooperates with the lower impeller C14 to form a turbulent flow field circulating inside the mixing tank; multiple resistance heating coils C15 are uniformly arranged on the inner wall of the double-impeller heating and high-efficiency preparation tank C1.

A number of viscosity detection probes C16 are installed in the double-impeller heating and high-efficiency preparation barrel C1. The viscosity detection probes C16 are arranged equidistantly in the barrel. The viscosity detection probes C16 transmit the detection data to the monitoring operation unit through the signal transmission unit. If the data of multiple viscosity detection probes C16 all meet the set value, it means that the preparation of the flocculation agent is completed, that is, the feeding pump is turned on to output the solution to the bar impeller stirring buffer barrel C10.

A liquid level sensor IC100 and a multi-rod impeller agitator C101 are installed in the rod impeller stirring buffer tank C10. The liquid level sensor IC100 is used to detect the liquid level of the material in the barrel; the multi-rod impeller agitator C101 rotates at a low speed to maintain the state of the prepared flocculant.

As shown in Figure 5, the drug buffer barrel C3 is designed with a liquid level sensor IIC30 electrically connected to the PLC, through the data of the constant flow drug flow meter C5, and correspondingly controlling the opening degree of the electric gate valve C4 to adjust the flow of the drug. Then control the liquid level in the set interval.

A plurality of jet nozzles C6 are installed on the central axis of the concentrator feed pipe towards the same; device C7.

As shown in Figures 9 and 10, the jet nozzle C6 is provided with a set of guide vanes C60 that cooperate with the slime water in the feed pipe of the concentrator to form a swirling flow, and the number of guide vanes C60 is set to four.

The pipeline mixer C7 is configured as multiple groups of liquid mixing units installed in the pipeline, and each mixing unit is composed of a plurality of fixed blades crossing at a specified angle.

The temperature of the medicine solution is controlled at 40 to 50° C. by the resistance heating coil C15 in the high-efficiency preparation barrel C1 with double impellers.

Embodiment 2. A treatment process of a coal slime water depth clarification system

The treatment process specifically includes the following steps:

S1. In the concentration online monitoring system A of the concentrator, the density detector A2 in the concentrator detects the change of the material layer in the concentrator D in real time, completes the data collection, and draws the concentration or density contour and cloud map in the concentrator D through the calculation software. Display the concentration state in the concentrator D, and send an alarm when the concentration exceeds the limit, and then adjust the dosing amount of the concentrator; at the same time, after sampling and monitoring through the intelligent concentration pot A1 of the concentrator during the online monitoring process, the online detection system for the concentration in the concentrator A Carry out regular maintenance and data correction, as shown in Figures 1 and 2;

S2. As shown in Figures 1 and 3, after the concentration in the concentrator D is transmitted to the automatic dosing system B of the slime water in real time, the coal slime water feeding detection unit first detects the concentration through the electromagnetic flowmeter B1 and the differential pressure concentration meter B2 The pulp flow rate and pulp concentration of the feeding pipe of machine D, the data signal is transmitted to the PLC, the flow rate and the concentration are multiplied to calculate the total dry slime amount, and various data are displayed on the touch screen; The control parameters are set, and then the PLC calculates the optimal dosage of chemicals according to the set parameters and the collected data signals; at the same time, the dosage is calculated continuously based on the actual concentration and flow rate of the slime water and the data information fed back by the online monitoring system A in the thickener , by controlling the metering pump to adjust the amount of agent added in real time; for a specific coal preparation plant, the fluctuation value of the slime water property is limited in a period of time, and the agent addition is mainly completed by the constant amount of drug addition channel; the calculation of the amount of agent added and the constant amount of drug addition The difference is completed by the variable medicine channel, which is conducive to the rapid addition of the medicine and eliminates the hysteresis of the medicine addition; there is also a flow meter on the pipeline of the variable medicine dosing channel, which is used to detect the output of the diaphragm metering pump, and the detection value Compared with the measurement value of the metering pump itself, it can realize data feedback and monitor the working status of the metering pump;

Among them, the slime water automatic dosing system B has a fully automatic mode and a semi-automatic mode: in the fully automatic mode, the PLC automatically calculates the coagulant and flocculant to be added according to the detected data such as the concentration and flow of the slime water, and adds ;In manual mode, the post driver manually sets the amount of coagulant and flocculant added according to the data collected by the system and displayed on the touch screen, and the PLC calculates the amount of agent added according to the given control parameters;

Then, the post driver outputs the control signal to drive the metering pump and electric valve for automatic dosing; at the same time, according to the actual concentration and flow of the slime water and the data information fed back by the online concentration monitoring system A in the concentrator, the dosing amount is calculated, and through the control The metering pump adjusts the dosage of the agent in real time; and the PLC reserves a communication interface, which can transmit the system data to the dispatching station for monitoring;

S3. As shown in Figures 5 and 7, after setting the dosage of the medicament, the medicament is added to the double-impeller heating and high-efficiency preparation barrel C1 of the dispersing system C of the medicament, forming a circular turbulent flow field, and the medicament rapidly Stir to dissolve, if the data of multiple viscosity detection probes C16 all meet the set value, then start the feeding pump to pump the solution to the rod impeller stirring buffer tank C10, and the rod impeller stirring buffer tank C10 is equipped with a liquid level sensor IC100, Multi-bar impeller agitator C101. The liquid level sensor IC100 is used to detect the liquid level of the material in the tank, and calculate the amount of medicine consumed according to the detection data of the material liquid level in the chemical buffer tank; the multi-rod impeller agitator C101 rotates at a low speed to maintain the state of the prepared flocculant;

The dissolved medicine solution is output to the multi-rod impeller stirring buffer barrel C10. There are two outlets at the bottom of the barrel, and the solution from one of the outlets goes to the constant dosage dosing channel. The medicine buffer barrel C3 on the constant dosage dosing channel is designed with a liquid level The sensor ⅡC30 keeps the liquid level in the set range and guarantees the stable and constant inflow of medicine in the constant dosing channel. Among them, the constant medicine flowmeter C5 provides data support for the adjustment of the electric gate valve C4, and then through the opening of the electric gate valve Adjust the constant flow rate of the medicament; the other outlet solution goes to the variable dosing channel, and the medicaments in the two dosing channels are sprayed out through the jet nozzle C6; because the jet nozzle C6 is installed in the middle of the feed pipe of the concentrator D On the axis, and the orientation is consistent with the feeding direction of the coal slime water feeding pipe, which ensures the jet flow in a limited space, so that it is fully and uniformly mixed with the coal slime water flowing from the thickener D feeding pipe through the pipeline mixer C7, Finally, it flows into the concentrator D.

Claims (10)

1. A coal slime water depth clarification system comprises thickener (D), is characterized in that also comprising following component: An online concentration monitoring system (A) in the thickener, the system includes a correction part and an online concentration detection part in the thickener, and the correction part corrects the data of the online concentration detection part in the thickener; Coal slime water automatic dosing system (B), the automatic dosing system includes a coal slime water feeding detection unit, a monitoring operation unit, and a medicament adding unit connected sequentially; The data signal output ends of the unit are all connected to the monitoring operation unit, and the instruction output end of the monitoring operation unit is connected to the medicament adding unit; Drug dispersing system (C), which includes a drug adding unit, a dual-impeller heating and high-efficiency preparation barrel (C1) for receiving the drug, and a rod impeller stirring buffer barrel (C10) for storing the drug. There are two outlets at the bottom of the mixing tank. Material port, one of which goes to the screw pump (C2) and the drug buffer barrel (C3), electric gate valve (C4), constant flow drug flowmeter (C5), and multiple jet nozzles (C6) in sequence to form a constant drug dosing channel , the other goes to the variable dosing channel formed by the diaphragm metering pump (C8), the variable drug flow meter (C9), and the jet nozzle (C6) in sequence; The slime water is fed into the feeding pipe, and the orientation of the jet nozzle (C6) is consistent with the feeding direction of the slime water feeding pipe; The control system composed of PLC, the online concentration monitoring system (A) in the concentrator, the automatic dosing system for coal slime water (B), and the chemical dispersion system (C) are all electrically connected to the control system. 2. A kind of coal slime water depth clarification system according to claim 1, is characterized in that: described correcting part is set as the intelligent concentration pot (A1) that material in thickener is sampled and detects concentration rapidly; The internal concentration online detection part is set as the internal density detector (A2) of the concentrator. 3. A kind of slime water depth clarification system according to claim 2, characterized in that: said intelligent concentration pot (A1) comprises a cube-shaped outer shell (A11) and is arranged in the shell as a cylindrical interior for collecting slime water. bladder (A12); the upper part of the outer casing (A11) is provided with a card slot (A111), the middle part is provided with a handle fixing device (A112) and an inner tank bracket (A113), and the card slot (A111) and the inner tank bracket (A113 ) are used to fix the inner tank (A12), the lower section is fixed with a display (A114), and the bottom of the sealed space surrounded by the outer shell (A11) and the inner tank (A12) is also fixed with a sensor (A13), and the sensor (A13) The upper and lower sides are respectively provided with upper and lower support plates (A131, A132), and the left and right sides of the upper and lower support plates (A131, A132) are respectively provided with upper and lower support plate baffles (A133, A134); The sensor (A13) is connected to the display (A114), and in the working state, the sensor (A13) converts the collected weight signal into the concentration of slime water and displays it on the display (A114); The inner density detector (A2) of the thickener is set as a test device that vertically evenly distributes and fixes a plurality of pressure transmitters (A21) in a sealed container, and the voltage output signal of the pressure transmitters (A21) adopts data Acquisition card collection. 4. A kind of slime water depth clarification system according to claim 3, characterized in that: said pressure transmitter (A21) adopts diffused silicon type pressure transmitter; said data acquisition card adopts MPS-010602 multifunctional USB signal acquisition card. 5. A kind of coal slime water deep clarification system according to claim 3, is characterized in that: described coal slime water feeding detection unit is set as electromagnetic flowmeter (B1) and differential pressure type concentration meter (B2), is used for respectively The pulp flow and pulp concentration of the feed pipe of the concentrator are detected, the monitoring operation unit includes a PLC and a touch screen electrically connected to the PLC, and the medicament adding unit includes a metering pump. 6. A kind of coal slime water deep clarification system according to claim 5, characterized in that: said double-impeller heating and high-efficiency preparation barrel (C1) includes a double-impeller agitator (C11) fixed on the upper end of the central axis of the barrel body, and the double-impeller A sleeve (C12) is fixed on the periphery of the impeller agitator (C11), and the central axis of the sleeve (C12) coincides with the central axis of the mixing bucket; the sleeve (C12) is provided with a first circulation hole (C120) , the double-impeller agitator is provided with a second circulation hole (C130) on the upper impeller (C13), the first circulation hole (C120), the second circulation hole (C130) and the lower impeller (C14) cooperate to form a stirring The turbulent flow field circulating inside the barrel; multiple resistance heating coils (C15) are uniformly arranged on the inner wall of the double-impeller heating and high-efficiency preparation barrel (C1); a viscosity detection probe (C16) evenly distributed in the bucket, and the viscosity detection probe (C16) is electrically connected to the monitoring operation unit; A liquid level sensor I (C100) and a multi-rod impeller stirrer (C101) are installed in the rod impeller stirring buffer barrel (C10), and the liquid level sensor I (C100) is electrically connected to the PLC. 7. A kind of coal slime water deep clarification system according to claim 6, characterized in that: the liquid level sensor II (C30) electrically connected with PLC is designed in the drug buffer tank (C3), and the flow rate of the agent through constant current According to the data of the meter (C5), correspondingly control the opening degree of the electric gate valve (C4) to adjust the flow of the medicament, and then control the liquid level in the set interval. 8. A kind of coal slime water depth clarification system according to claim 7, is characterized in that: a plurality of jet nozzles (C6) are installed on the central axis of concentrator feed pipe toward identical; And in jet nozzle (C6) A pipeline mixer (C7) for fully mixing the medicament and the slime water is also installed on the pipeline downstream of the concentrator feed pipe. 9. A coal slime water deep clarification system according to claim 6, characterized in that: the temperature of the chemical solution is controlled at 40 to 50°C by means of a resistance heating coil (C15) in the double-impeller heating and high-efficiency preparation barrel (C1) , to reduce the preparation time of the drug solution. 10. A treatment process of the slime water depth clarification system as claimed in claim 8, characterized in that it specifically comprises the following operations: S1. In the online monitoring system (A) for the concentration in the concentrator, the density detector (A2) in the concentrator (A2) detects the change of the material layer in the concentrator (D) in real time, completes the data collection, and draws the concentration in the concentrator (D) through the calculation software Or the density isoline and cloud map, showing the concentration status in the concentrator (D), when the concentration exceeds the limit, an alarm is issued, and then the dosage of the concentrator is adjusted; at the same time, during the online monitoring process, the intelligent concentration pot (A1) is used for sampling and monitoring Finally, carry out regular maintenance and data correction on the concentration online monitoring system (A) in the thickener; S2. After the concentration in the thickener (D) is transmitted to the automatic dosing system (B) of the slime water in real time, the coal slime water feeding detection unit first detects the concentration through the electromagnetic flowmeter (B1) and the differential pressure concentration meter (B2). The pulp flow and pulp concentration of the machine (D) feeding pipe, the data signal is transmitted to the PLC, the flow and the concentration are multiplied to calculate the total dry slime amount, and various data are displayed on the touch screen; The dispatcher sets the control parameters on the touch screen according to the displayed data, and then the PLC calculates the dosage of the medicine according to the set parameters and the collected data signals; S3. After setting the dosage of the medicine, the medicine is added to the double-impeller heat-generating high-efficiency preparation barrel (C1) of the medicine dispersion system (C) to form a circular turbulent flow field, and the medicine is rapidly stirred and dissolved at 40 to 50°C, as The data of multiple viscosity detection probes (C16) all meet the set value, that is, the feeding pump is turned on to output the solution to the rod impeller stirring buffer barrel (C10), and the liquid level sensor Ⅰ (C100) detects the liquid level of the material in the barrel until the liquid The position meets the requirements; the multi-rod impeller agitator (C101) rotates at a low speed to maintain the state of the prepared flocculant; S4. The pumps of the two outlets at the bottom of the drug buffer tank are turned on, and the solution of one of the outlets goes to the constant dosing channel, and the flow of the drug is adjusted by the opening degree of the electric gate valve (C4), and the solution of the other outlet goes to the variable Dosing channel, the chemicals in the two dosing channels are all sprayed out through the jet nozzle (C6), and then fully mixed with the slime water flowing in from the feed pipe of the thickener (D) through the pipeline mixer (C7), and finally flow into the thickener (D).