CN-117582885-B - Automatic preparation system and method for hydraulic circulating flocculant

CN117582885BCN 117582885 BCN117582885 BCN 117582885BCN-117582885-B

Abstract

The invention provides an automatic preparation system and method of a hydraulic circulating flocculant, and belongs to the technical field of flocculant preparation. The system comprises a powder adding module, a preparation module, a storage conveying module and an intelligent control module, wherein the powder adding module is located above the space of the preparation module, the preparation module is located at the upstream of the storage conveying module, and the intelligent control module controls the whole system. In the system, the flocculant solution is prepared through the double flow field effect of mechanical stirring and hydraulic circulation, the flocculant powder is circulated and reflowed in the preparation module by virtue of the hydraulic flow field, and the flocculant powder is fully diffused and dissolved under the mechanical stirring effect in the circulation process, so that the mixing state of flocculant preparation is more uniform, the formed hydraulic dead zone is smaller, the dissolution and growth of flocculant molecules are facilitated, and the flocculant preparation efficiency and quality are improved. The system realizes intelligent preparation of flocculant solution, can effectively assist efficient flocculation of tailings, promotes development of paste filling technology, and realizes recycling utilization of mine solid wastes.

Inventors

WU AIXIANG
WANG SHAOYONG
SHEN JIAHUA
XIAO BAILIN
LI XIAOSONG
WANG JIANDONG
LIU PENGPENG
Gong Wutian
WANG YIMING
WU PENGJIE
LI ZHANYAN
YAO GAOHUI
ZHANG AIQING
TIAN WENDONG
WANG HONGJIANG
QIN SHUAI

Assignees

北京科技大学
中色非洲矿业有限公司

Dates

Publication Date: 20260508
Application Date: 20231127

Claims (6)

1. The automatic preparation system of the hydraulic circulating flocculant is characterized by comprising a powder adding module, a preparation module, a storage and conveying module and an intelligent control module, wherein the powder adding module is positioned above the space of the preparation module, and the preparation module is positioned at the upstream of the storage and conveying module; The powder adding module comprises a powder bin, a micro powder scale, a screw conveyor and a moistureproof uniform distributor, The preparation module comprises a water inlet pipe, a preparation bin, a spiral stirrer, a filter screen, a circulating pump and a hydraulic circulating pipe, The storage and conveying module comprises a storage bin, The intelligent control module comprises a preparation bin level gauge, a high-level gauge, a low-level gauge, an electromagnetic flowmeter, an electromagnetic valve and a PLC intelligent control platform; the preparation bin is of an upper straight cylinder and lower cone structure; The micro powder scale is arranged at the outlet of the powder bin, the screw conveyor is arranged at the lower part of the micro powder scale, the moisture-proof uniform distributor is arranged at the feed opening of the screw conveyor, the moisture-proof uniform distributor is arranged at the top in the preparation bin, the screw stirrer is vertically arranged downwards at the center of the top of the preparation bin, and the preparation bin level gauge is arranged at the top of the inner wall of the preparation bin; The water inlet pipe is arranged in the center of the top of the preparation bin, the hydraulic circulating pipe is arranged on the side wall of the preparation bin, the hydraulic circulating pipe comprises a high-position circulating pipe and a low-position circulating pipe, the high-position circulating pipe is arranged on the side wall of the straight cylinder of the preparation bin, the low-position circulating pipe is arranged on the side wall of the cone of the preparation bin, and the high-position circulating pipe and the low-position circulating pipe are connected through a circulating pump; The filter screen is arranged at the bottom in the preparation bin, the outlet at the bottom of the preparation bin is connected with the storage bin through a pipeline, the upper part of the inner wall of the storage bin is provided with the high-position level gauge, the lower part of the inner wall of the storage bin is provided with the low-position level gauge, the outlet at the bottom of the storage bin is provided with the electromagnetic valve, and the electromagnetic valve is provided with the electromagnetic flowmeter; The preparation bin is a straight bin with a conical bottom, and the bottom cone angle is 90-120 degrees; the screen mesh is 0.5cm multiplied by 0.5cm, and is arranged at the junction of the conical and straight cylinder in the preparation bin; the water inlet pipe comprises a water inlet pipe main pipe and a water inlet pipe nozzle, the water inlet pipe main pipe is horizontally arranged in the center of the top of the preparation bin, the water inlet pipe nozzle is symmetrically distributed by taking a discharging pipe of the screw conveyor as an axis and is vertically arranged in the water inlet pipe main pipe, the outlet of the water inlet pipe nozzle is lower than the outlet of the discharging pipe, and the outlet of the water inlet pipe nozzle extends into the preparation bin; An electromagnetic flowmeter and an electromagnetic valve are arranged on the main pipe of the water inlet pipe; the fluid in the preparation bin flows out from the high-position circulating pipe, is conveyed to the low-position circulating pipe through the circulating pump and enters the preparation bin again; the high-position circulating pipe is tightly attached to the outer wall of the straight section of the preparation bin by a circulating pump and extends upwards, and the wall of the vertical straight section of the cylinder is inserted into the preparation bin when the circulating pipe extends to the installation height of the level gauge of the preparation bin; The low-level circulating pipe is extended downwards from the circulating pump to be clung to the outer wall of the straight section of the preparation bin, is inclined downwards along the conical outer wall of the bottom when extending to the bottom of the straight section, is then inserted into the preparation bin vertically with the conical wall, meanwhile, the tail end of the low-level circulating pipe is arranged below the horizontal plane of the filter screen, and the caking flocculant intercepted by the filter screen can be recycled by low-level circulating water flow and enter the stirring flow field for the second time.
2. The automatic preparation system of the hydraulic circulating flocculant according to claim 1, wherein the bottom of the powder bin is conical, the cone angle is set to be 45-60 degrees, and the flocculant powder is lowered to the screw conveyor by gravity.
3. The automatic preparation system of the hydraulic circulating flocculant according to claim 1, wherein the screw conveyor is a closed conveying pipeline, a discharging pipe of the screw conveyor is positioned above the center of the preparation bin, and the discharging pipe is 10-20 cm away from the top of the preparation bin; an electric lifting rail is arranged on the outer wall of the discharging pipe of the screw conveyor.
4. The automatic preparation system of the hydraulic circulating flocculant according to claim 3, wherein the moistureproof uniform distributor is arranged on an electric lifting track of a discharging pipe of the screw conveyor, so that the moistureproof uniform distributor moves up and down; the moistureproof uniform distributor is of a conical structure, and the cone angle is 90-120 degrees.
5. The automatic preparation system of a hydronic flocculant according to claim 1, wherein the preparation module is located upstream of the storage and delivery module and selects self-flow delivery or pump delivery depending on the location of installation of the two; an electromagnetic flowmeter and an electromagnetic valve are arranged on a conveying pipe between the preparation bin and the storage bin.
6. The method for using the automatic preparation system of the hydraulic circulating flocculant according to claim 1, comprising the following steps: S1, setting parameters of flocculant unit consumption, flocculant solution concentration, stirrer rotating speed and stirring time to a PLC intelligent control platform, and analyzing and calculating by the PLC according to the set parameters and production data fed back by upstream and downstream process links to obtain the addition amount of flocculant powder and the addition flow of prepared water; S2, a preparation module starts a water inlet pipe electromagnetic valve and a spiral stirrer, an electromagnetic flowmeter is used for detecting the preparation water quantity, a detected preparation water quantity data signal is transmitted to a PLC, the PLC compares a preparation water quantity given value with a detection value, and then an output signal is used for adjusting the opening degree of the electromagnetic valve to control the preparation water addition quantity; s3, after the preparation bin is added with the preparation water, the PLC controls the powder adding module to start the screw conveyor, and the moistureproof uniform distributor descends along the track synchronously to open the blanking pipe; detecting the flocculant powder amount by a micro-powder scale, transmitting a detected flocculant powder amount data signal to a PLC, comparing a powder amount given value with a detection value by the PLC, and further outputting a signal to adjust the blanking amount of the screw conveyor; S4, when the flocculant powder is added into the preparation bin, the PLC controls the water circulation pipe circulation pump to be synchronously started, and due to the rotation of the spiral stirrer, vortex is formed in the central area of the preparation bin, fluid is driven to flow to the wall surface, and the flocculant powder is rapidly diffused; S5, when the stirring time reaches a given value, the PLC controls a solenoid valve of a conveying pipe of a preparation bin to be opened, the prepared flocculant solution automatically flows or is pumped down to a storage bin for standby, an electromagnetic flowmeter is used for detecting the flocculant solution quantity, a detected solution quantity data signal is transmitted to the PLC, the PLC compares the solution quantity given value with a detection value and then outputs a signal to adjust the opening degree of the solenoid valve, the liquid level of the storage bin is monitored through a high-level gauge and a low-level gauge, the monitored liquid level data signal is transmitted to the PLC, when the liquid level reaches a highest liquid level early warning value, the PLC outputs a control signal to close the solenoid valve, and when the liquid level reaches a lowest liquid level early warning value, the PLC outputs a signal to start a powder adding module and a preparation module to prepare the flocculant solution; And S6, when the PLC receives an instruction for starting the operation of the thickener, the PLC controls the electromagnetic valve of the conveying pipe of the storage bin to be opened, the electromagnetic flowmeter is used for detecting the solution quantity, the detected solution quantity data signal is transmitted to the PLC, the PLC compares the given value of the solution quantity with the detection value, and then the output signal is used for regulating the opening of the electromagnetic valve to control the discharge flow of the flocculant solution.

Description

Automatic preparation system and method for hydraulic circulating flocculant Technical Field The invention relates to the technical field of flocculant preparation, in particular to an automatic preparation system and method of a hydraulic circulating flocculant. Background Mine tailings are often subjected to a thickening technology to finally realize solid waste recycling. In order to improve the sedimentation velocity and the thickening efficiency of tailings, a flocculant polymer solution is added into the tailings slurry, and the size of the tailings particles is increased and sedimentation is rapid under the flocculation effect and the gravity effect. Efficient flocculation of tailings is a precondition and core for achieving deep dense dehydration. In the actual production process, the preparation of the flocculant solution has more problems that firstly, a flocculant powder discharging pipe is often close to a preparation bin, water vapor is easy to generate in the stirring process of the preparation bin, so that the flocculant powder in the powder bin and the discharging pipe is wetted and agglomerated and fails in advance, and the flocculation effect is affected; secondly, the conventional flocculant preparation system only uses the mechanical shearing action generated by the stirring device, when the stirring speed is too small, flocculant molecules cannot be fully diffused and are unevenly stirred, stirring vortex only exists in the center of a preparation bin, a dead zone in the preparation bin is large, the utilization rate is low, while the whole flow of a stirring flow field is increased along with the increase of the stirring speed, the range of driving fluid is wider, the dead water area in a container is reduced, the shearing strength of the flow field is too high due to the increase of the stirring speed, the high molecular long-chain structure is easily damaged due to excessive shearing, and the flocculation effect is influenced due to the fact that the stirring speed is too large and too small. Meanwhile, the stirring device often has a circulation blind area, part of flocculant powder is discharged to a thickener after insufficient stirring, so that the flocculation effect is poor, and thirdly, most of flocculant preparation systems at present cannot effectively monitor the addition of materials, the preparation process is highly dependent on manual control and experience regulation, intelligent preparation of flocculant number is not realized yet, and serious hysteresis exists in production management. The invention provides a hydraulic circulating flocculant automatic preparation system and a hydraulic circulating flocculant automatic preparation method, which are extremely important, wherein an additional and milder circulating flow field is added through a hydraulic circulating pipe, flocculant powder is circulated and reflowed in a preparation bin by virtue of the hydraulic flow field, flocculant molecules are fully dispersed and dissolved under the action of mechanical stirring in the circulating process, in addition, a moistureproof device and a uniform distributing device are added through optimizing a powder bin blanking device, so that the caking failure of the flocculant powder is avoided, and the full diffusion of flocculant particles in the preparation bin is ensured. Disclosure of Invention The invention provides an automatic preparation system and method of a hydraulic circulating flocculant. In order to solve the above-mentioned purpose, the technical scheme provided by the invention is as follows: the automatic preparation system of the hydraulic circulating flocculant comprises a powder adding module, a preparation module, a storage and conveying module and an intelligent control module, wherein the powder adding module is positioned above the space of the preparation module, and the preparation module is positioned at the upstream of the storage and conveying module; The powder adding module comprises a powder bin, a micro powder scale, a screw conveyor and a moistureproof uniform distributor, The preparation module comprises a water inlet pipe, a preparation bin, a circulating pump, a hydraulic circulating pipe, a spiral stirrer and a filter screen, The storage and conveying module comprises a storage bin, The intelligent control module comprises a preparation bin level gauge, a high-level gauge, a low-level gauge, an electromagnetic flowmeter, an electromagnetic valve and a PLC intelligent control platform; the preparation bin is of an upper straight cylinder and lower cone structure; The micro powder scale is arranged at the outlet of the powder bin, the screw conveyor is arranged at the lower part of the micro powder scale, the moisture-proof uniform distributor is arranged at the feed opening of the screw conveyor, the moisture-proof uniform distributor is arranged at the top in the preparation bin, the screw stirrer is vertically arranged downwards at the cent