CN105174402B - A kind of automatic adding flocculant system settled for black water and its method - Google Patents

Abstract

The invention discloses an automatic flocculant adding system for coal slime water settlement, which includes a thickener and the following components: an automatic coal slime water dosing system, the automatic dosing system includes sequentially connected coal slime water feeding detection units , monitoring operation unit, agent adding unit; agent dispersing system, which includes a dual-impeller heating high-efficiency preparation barrel connected to the agent adding unit and an agent adding buffer barrel. There are two outlets at the bottom of the agent adding buffer barrel, respectively leading to constant The dosing channel and the variable dosing channel; the medicines in the constant dosing channel and the variable dosing channel are all imported into the slime water feeding pipe; the slime water automatic dosing system and the medicine dispersing system are electrically connected to the control system. The invention also provides an adding method of the flocculant automatic adding system, which saves more medicine dosage and improves the sedimentation effect of coal slime water.

Description

A flocculant automatic adding system and method for coal slime water settlement

technical field

The invention belongs to the technical field of coal preparation, and in particular relates to an automatic flocculant adding system and method for coal slime water settlement.

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 use the method of directly adding coagulant and flocculant 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; for flocculant The amount of addition directly affects the sedimentation effect of the 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, it is urgent for those skilled in the art to provide a more chemical-saving and more perfect flocculant automatic addition system and method for coal slime water settlement.

Contents of the invention

Aiming at the above disadvantages, the present invention provides a more chemical-saving and more perfect flocculant automatic addition system and method for coal slime water settlement.

In order to achieve one of the above objects, a flocculant automatic addition system for coal slime water settlement is provided, and the present invention adopts the following technical solutions:

An automatic flocculant addition system for coal slime water settlement, including a thickener, also includes the following components:

Coal slime water automatic dosing system, this automatic dosing system comprises coal slime water feeding detection unit, monitoring operation unit, medicament adding unit successively connected; connected, and the instruction transmission end of the monitoring operation unit is connected with the medicament addition 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 automatic dosing system of coal slime water and the dispersing system of medicine are all electrically connected with the control system.

Preferably, 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 slurry flow rate and the slurry 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.

Further, a plurality of resistance heating coils are evenly arranged on the inner wall of the double-impeller heating and high-efficiency preparation barrel; a plurality of viscosity detection probes evenly distributed in the barrel are installed in the double-impeller heating and high-efficiency preparation barrel, and the viscosity detection The probe is electrically connected with the monitoring operation unit.

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.

Further, a liquid level sensor I and a multi-rod impeller stirrer are installed in the rod impeller stirring buffer tank, 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 jet nozzle is provided with a group of guide vanes that cooperate with the slime water in the feed pipe of the concentrator to form a swirling flow;

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.

The second object of the present invention is to provide a method for adding the above-mentioned flocculant automatic adding system, which specifically includes the following steps:

S1. 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 pulp flow and pulp concentration of the feed pipe of the thickener through the electromagnetic flowmeter and differential pressure density 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;

S2. 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;

S3. 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 automatic dosing system for coal slime water of the present invention, the agent dispersion system, and the control system cooperate together to form an automatic flocculant adding system. The automation of the adding method adapted to this system is greatly improved, and the input of manpower and material resources is greatly reduced. The muddy water automatic dosing system calculates the amount of medicine to be added, and drives the medicine adding unit to automatically add medicine through the PLC. The quantitative medicine from the medicine adding unit flows into the medicine dispersion system and is fully dissolved and dispersed. The muddy water flows in and is sprayed in the same direction, and the mixing of the agent and the slime water is more uniform, thereby saving the amount of the agent.

2), the present invention can be applied in the coal slime water deep clarification system, wherein, the agent adding unit is the final execution link of the coal slime water automatic dosing system, and the system calculates the best coagulant under this concentration according to the total dry slime amount Dosing with flocculant, dosing through metering pump and electric valve. 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 thickener in the slime water depth clarification system, the difference between the amount of chemical addition and the constant amount of chemical addition is calculated, and the diaphragm metering of the variable chemical dosing channel is controlled. It is completed by the pump, which is conducive to the rapid addition of the agent and eliminates the hysteresis of the agent 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.

3), the mixing tank in the present invention is set as a double-impeller heating and efficient 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.

4), a plurality of jet nozzles of the present invention are installed on the central axis of the feed pipe of the concentrator towards 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.

5), 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. It is composed of specified angles; the jet nozzle is equipped with a set of guide vanes that cooperate with the slime water in the feed pipe of the concentrator to form a swirling flow, which is conducive to the further mixing of the agent and the slime water and improves the use efficiency of the agent.

Description of drawings

Fig. 1 is the flow chart that the present invention is applied in the deep clarification system of coal slime water.

Figure 2 is a flow chart of the online concentration monitoring system in the thickener in the slime water deep clarification system.

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

Fig. 4 is a flow chart of calculation of the data collected by the density detector inside the thickener in the slime water depth clarification system.

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

Figure 6 is a schematic diagram of the structure of the intelligent concentration pot in the slime water depth clarification system.

Fig. 7 is a schematic diagram of the structure of the density detector inside the thickener in the slime water deep clarification system.

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. The present invention is applied in the deep clarification system of coal slime water

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

① On-line concentration monitoring system A in the concentrator, the system includes a correction part and an online concentration detection part in the concentrator, and the correction part corrects the data of the online concentration detection part in the concentrator;

②The flocculant automatic addition system, the flocculant automatic addition system of the present invention includes:

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 barrel 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. The present invention is applied to the processing technology in the deep clarification system of coal slime water

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 metering value of the metering pump itself, the data feedback and the monitoring of the working state of the metering pump are realized;

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 flocculant automatic addition system for coal slime water settlement, comprising a thickener (D), is characterized in that it also includes the following components: Coal slime water automatic dosing system (B), this automatic dosing system comprises coal slime water feeding detection unit, monitoring operation unit, medicament addition unit successively successively; The data signal output end of described coal slime water feeding detection unit is all connected with The monitoring operation unit is connected, and the instruction output end of the monitoring operation unit is connected with 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. One of the outlets is sequentially connected to the screw pump (C2) and the chemical buffer barrel (C3), electric gate valve (C4), constant flow chemical flow meter (C5), and multiple jet nozzles (C6) to form a constant dosing channel. , and the other goes in sequence to form the diaphragm metering pump (C8) of the variable dosing channel, the variable medicine flow meter (C9), and the jet nozzle (C6); the medicines of the constant dosing channel and the variable dosing channel all flow into The slime water is fed into the feeding pipe, and the direction of the jet nozzle (C6) is consistent with the feeding direction of the slime water feeding pipe; The control system composed of PLC, the automatic dosing system of coal slime water (B) and the dispersing system of medicine (C) are all electrically connected with the control system. 2. a kind of flocculant automatic adding system for the settlement of coal slime water according to claim 1 is characterized in that: described coal slime water feeding detection unit is set as electromagnetic flowmeter (B1) and differential pressure type concentration meter ( B2), respectively used to detect the pulp flow and pulp concentration of the feed pipe of the concentrator; the monitoring operation unit includes a PLC and a touch screen electrically connected to the PLC; the medicament adding unit includes a metering pump. 3. A kind of flocculant automatic adding system for coal slime water settlement according to claim 2, it is characterized in that: described double-impeller heating high-efficiency preparation bucket (C1) comprises the double-impeller stirring that is fixed on the upper end of the central axis of the bucket body device (C11), a sleeve (C12) is fixed on the periphery of the double-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 second A 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 ) to form a turbulent flow field circulating inside the mixing tank. 4. a kind of flocculant automatic adding system that is used for coal slime water settlement according to claim 3 is characterized in that: on the inwall of double impeller heating efficient preparation barrel (C1), also be evenly provided with a plurality of resistance heating coils ( C15); a plurality of viscosity detection probes (C16) evenly distributed in the barrel are also installed in the double-impeller heating high-efficiency preparation barrel (C1), and the viscosity detection probes (C16) are electrically connected to the monitoring operation unit. 5. A kind of flocculant automatic adding system that is used for coal slime water settlement according to claim 4, is characterized in that: in described double-impeller heating high-efficiency preparation barrel (C1), control the temperature of medicament solution by resistance heating coil (C15) The temperature is between 40 and 50°C to reduce the preparation time of the medicament solution. 6. A kind of flocculant automatic adding system for coal slime water settlement according to claim 4, it is characterized in that: liquid level sensor I (C100), multiple Rod impeller stirrer (C101), liquid level sensor I (C100) are electrically connected with PLC. 7. A kind of flocculant automatic adding system for coal slime water settlement according to claim 6, it is characterized in that: the liquid level sensor II (C30) that is electrically connected with PLC is designed in the said agent buffer barrel (C3) , according to the data of the constant flow medicine flowmeter (C5), the opening degree of the electric gate valve (C4) is controlled accordingly to adjust the flow of medicine, and then the liquid level is controlled to be in the set interval. 8. a kind of flocculant automatic adding system for the settlement of coal slime water according to claim 7, is characterized in that: a plurality of jet nozzles (C6) are installed on the central axis of concentrator feeding pipe toward identical; And At the downstream of the jet nozzle (C6), a pipeline mixer (C7) for fully mixing the medicament and the slime water is also installed on the pipeline of the feed pipe of the concentrator. 9. A kind of flocculant automatic adding system that is used for coal slime water settlement according to claim 8, is characterized in that: described jet nozzle (C6) is provided with a group of coordinating coal slime water in the feed pipe of thickener to form swirling flow guide vanes (C60). 10. a kind of adding method for the flocculant automatic addition system that is used for coal slime water settlement as claimed in claim 8, is characterized in that specifically comprising the following steps: S1. In the coal slime water automatic dosing system (B), the coal slime water feeding detection unit first detects the flow rate of the slurry in the feed pipe of the thickener (D) through the electromagnetic flowmeter (B1) and the differential pressure concentration meter (B2). Slurry concentration, the data signal is transmitted to the PLC, the flow rate is multiplied by the concentration 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; S2. 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 quickly stirred and dissolved at 40 to 50°C, such 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; S3. 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).