CN-121978275-A - Gangue slurry concentration on-line detection and automatic adjustment method and system

CN121978275ACN 121978275 ACN121978275 ACN 121978275ACN-121978275-A

Abstract

The invention relates to a gangue slurry concentration online detection and automatic adjustment method and system, the method is through setting up a plurality of detection adjustment points along the line interval of the conveying pipeline, and control the sensor array to gather the time synchronization of cycle and slurry flow through the fixed detection section, realize the segmentation detection to the continuous slurry, calculate overall average concentration and segregation coefficient according to this, detect the adjustment point and carry out the regulation on the spot according to the judgement result, utilize slurry self-flowing energy to drive the dry material to add the mechanism to add the dry material, make up water through the water injection unit, and adopt the magnetically coupled stirring unit of driving to carry on the intensity adjustable to mix; the corresponding system comprises a detection module and an adjustment execution module, wherein the adjustment execution module is integrated with a dry material adding unit, a water supplementing unit and a mixing unit. The invention solves the problems of adjustment lag, object dislocation and difficult quantification of segregation states in long-distance conveying, and realizes online detection and automatic adjustment of slurry concentration.

Inventors

WANG JIONG
WU YONGWEI
WANG HAOSEN
YU GUANGYUAN
LIU PENG
JIANG JIAN
MA LEI
LIANG WENZHAO
Sang Biaowei
WANG SHUAIJIE
CHANG YIWEN
Tian Huanzhi
LIU YIPENG

Assignees

中国矿业大学(北京)

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. The on-line detection and automatic adjustment method for the concentration of the gangue slurry is characterized by comprising the following steps of: S1, repeatedly executing the following steps at a plurality of detection adjustment points which are arranged at intervals along the extending direction of the conveying pipeline (1); s2, synchronously acquiring concentration detection data of a plurality of space points through a sensor array arranged in a detection section of slurry flowing through the detection section corresponding to the current detection adjustment point; S3, calculating the overall average concentration of the gangue slurry in the detection section and a segregation coefficient representing the upper and lower layering degree of the gangue slurry based on all the acquired concentration detection data, wherein the segregation coefficient is calculated according to the difference value between the average concentration of the sensor positioned at the lower side of the detection section and the average concentration of the sensor positioned at the upper side of the detection section and the overall average concentration; S4, comparing the overall average concentration obtained by the detection section with a preset concentration target range to judge whether the dry material or the water needs to be supplemented; s5, according to a judging result, starting corresponding adjusting actions on site, and performing instant treatment on the slurry flowing through the detection section, wherein the adjusting actions comprise performing re-homogenization treatment on the separated slurry and/or performing concentration adjustment on the slurry with abnormal concentration.
2. The method for on-line detection and automatic adjustment of gangue slurry concentration according to claim 1, wherein in step S5, the adjustment action performs the corresponding operation: When the dry material is judged to be needed to be supplemented, injecting a preset amount of dry material into the slurry at the downstream of the detection section; when it is determined that water replenishment is required, a preset amount of water is injected into the slurry downstream of the detection section; the slurry after injection of the material is mixed at a corresponding speed depending on the degree of segregation and/or the amount of material to be replenished.
3. The on-line detection and automatic adjustment method for the concentration of gangue slurry according to claim 2, wherein the specific steps of supplementing dry materials are as follows: A1, when the overall average concentration is judged to be smaller than a preset concentration target range, the controller calculates the preset quantity of the required dry materials to be supplemented based on the difference value of the overall average concentration and the preset concentration target range; A2, the controller controls the variable feeder (3211) to work, and the variable feeder (3211) takes out a preset amount of dry materials from the dry material storage bin and conveys the dry materials to the dry material temporary storage bin (326); A3, the slurry is led out from the downstream of the detection section to drive a water wheel (322) to rotate, the rotating motion of the water wheel (322) is converted into the reciprocating linear motion of a first piston (325) through an eccentric wheel (329), and the reciprocating motion of the first piston (325) pumps the dry material in a dry material temporary storage bin (326) into the slurry.
4. The on-line detection and automatic adjustment method for the concentration of gangue slurry according to claim 2, wherein the specific steps of supplementing water are as follows: B1, when the overall average concentration is judged to be larger than a preset concentration target range, the controller calculates the preset amount of the required supplementary water based on the difference value of the overall average concentration and the preset concentration; b2, the controller controls the water pump to work, water in the water storage tank is pumped into the water supplementing unit (33) through the water pump, water is injected into the slurry by controlling the opening and closing of the water injection pipe (332) on the water supplementing unit (33), and the total water supplementing amount is monitored by the flow meter arranged in the water storage tank.
5. An on-line gangue slurry concentration detection and automatic adjustment system, characterized in that the method of any one of claims 1 to 4 is adopted, and the system comprises a plurality of detection adjustment points which are arranged in series at intervals along a conveying pipeline (1), wherein each detection adjustment point comprises: The detection module (2) comprises a first pipe body (21) and a sensor array arranged in the first pipe body, and is used for acquiring concentration data of flowing slurry on line and calculating overall average concentration and segregation coefficient; The device comprises an adjusting execution module (3), a second pipe body (31), a dry material adding unit, a water supplementing unit (33) and a mixing unit (34), wherein the adjusting execution module is connected with the tail end of the detecting module (2) in series and is used for receiving instructions and executing adjusting operation, the second pipe body (31) is connected with the first pipe body (21) in a flange mode, the dry material adding unit is arranged at the joint of the first pipe body (21) and the second pipe body (31), the water supplementing unit (33) is arranged at the inlet end of the second pipe body (31), the mixing unit (34) is arranged in the second pipe body (31) and is positioned at the downstream of the water supplementing unit (33), the dry material adding unit is used for adding dry materials into slurry, the water supplementing unit (33) is used for injecting water into the slurry, and the mixing unit (34) is used for stirring and mixing the slurry.
6. The gangue slurry concentration on-line detecting and automatic adjusting system according to claim 5, wherein the sensor array comprises a plurality of groups of detecting units which are axially arranged at intervals along the first pipe body (21), each group of detecting units comprises a plurality of first concentration sensors (22) circumferentially uniformly distributed on the inner wall of the first pipe body (21) and a fixing rod (24) which is arranged inside the first pipe body (21) and extends along the radial direction, and at least one second concentration sensor (23) is arranged on the fixing rod (24) close to the middle position.
7. The system for on-line detection and automatic adjustment of gangue slurry concentration as claimed in claim 5, wherein said dry material adding unit comprises: the V-shaped shunt tube (321) is communicated with the first tube body (21) and the second tube body (31), and a water wheel (322) driven to rotate by slurry is arranged in the V-shaped shunt tube (321); a dry material adding mechanism (323) comprising a first cylinder body (324), a first piston (325), a dry material temporary storage bin (326) and a material supplementing pipe (327); The transmission mechanism is used for connecting a driving shaft (328) of the water wheel (322) with the first piston (325), converting the rotation motion of the water wheel (322) into the reciprocating motion of the first piston (325) so as to pump the dry material in the dry material temporary storage bin (326) into the V-shaped shunt tube (321) through the material supplementing pipe (327).
8. The system for on-line detection and automatic adjustment of gangue slurry concentration as claimed in claim 7, wherein the transmission mechanism comprises an eccentric (329) provided on an end of the drive shaft (328), and a first link (3210) connecting the eccentric (329) and the first piston (325).
9. The system for on-line detection and automatic adjustment of gangue slurry concentration according to claim 5, wherein the water supplementing unit (33) comprises an annular water injection ring (331) coaxially sleeved outside the second pipe body (31), a plurality of water injection pipes (332) communicated with the inside of the second pipe body (31) are circumferentially arranged on the inner ring of the annular water injection ring (331), and a third electromagnetic valve is respectively arranged in each water injection pipe (332).
10. The system for on-line detection and automatic adjustment of gangue slurry concentration according to claim 5, wherein the mixing unit (34) comprises a rotating shaft (341) coaxially arranged in the second pipe body (31), a plurality of stirring rods (342) arranged on the rotating shaft (341), a driving motor (343) arranged on the outer side of the second pipe body (31), and a magnetic coupling driving member (344) connecting the driving motor (343) and the rotating shaft (341).

Description

Gangue slurry concentration on-line detection and automatic adjustment method and system Technical Field The invention relates to the technical field of slurry concentration detection, in particular to an on-line detection and automatic adjustment method and system for gangue slurry concentration. Background When the coal mine is mined, the gangue is used as a concomitant product of coal mining and is usually discharged to the ground as solid waste, so that a gangue dump special for a mining area is formed. By implementing gangue fluidization filling mining, the pollution of gangue to the environment can be reduced. The coal gangue discharged from the coal mine is used as main aggregate of the filling body, the coal gangue is crushed and ground to be added with water and additives to prepare slurry with specific concentration, the slurry is conveyed to a coal mine goaf or a waste space through a slurry pipeline conveying technology, and the spontaneous combustion danger of the ground surface subsidence and the roof-cutting entry retaining goaf can be effectively relieved while the gangue is consumed, but the research on the coal gangue slurry filling is less, particularly the research on the long-distance conveying of the gangue slurry is still imperfect, and the research on part of problems is still blank, so that the development of the slurry filling technology in the field of solid waste disposal of the coal gangue is severely restricted. In underground filling mining of coal mine, coal gangue is crushed and pulped and then pumped to a goaf through a conveying pipeline with the length of hundreds of meters or even thousands of meters, and in the long-distance conveying process of the slurry, segregation (namely uneven concentration) and overall concentration deviation of the slurry are easy to occur due to particle sedimentation and water migration, so that the problems of risk surge of a blocked pipe and unstable quality of the filled body are easily caused, the concentration detection is usually carried out at the tail end or a single node of the conveying pipeline in the prior art, signals are fed back to a preparation station at the starting end for adjustment, and due to the fact that the slurry conveying distance is long and the flow speed is slow, the detected slurry flows through the time lag, the fact that other slurry with the subsequent state possibly changed is actually accepted and adjusted, the detection and adjustment objects are completely misplaced, and even adverse effects are caused, in addition, the existing concentration detection is carried out by a single or small quantity of sensors installed on the pipeline wall, the measurement result is only the concentration of a local point, the concentration of the pipeline is difficult to comprehensively reflect the concentration of the pipeline cross section (especially the concentration of the central area), the true segregation concentration distribution is difficult to be controlled due to the fact that the concentration of the segregation concentration of the particles is more evenly distributed, the concentration of the true segregation is difficult to realize due to the fact that the quality deviation is difficult to realize due to the fact that the quality average segregation coefficient is difficult to control is difficult to realize due to the quality control of the quality-dependent on the segregation quality-dependent on the quality segregation. Disclosure of Invention In view of the above problems, the invention provides a method and a system for on-line detection and automatic adjustment of gangue slurry concentration, so as to solve the problems in the background art. The specific technical scheme is as follows: An on-line detection and automatic adjustment method for the concentration of gangue slurry comprises the following steps: S1, repeatedly executing the following steps at a plurality of detection adjustment points which are arranged at intervals along the extending direction of the conveying pipeline; s2, synchronously acquiring concentration detection data of a plurality of space points through a sensor array arranged in a detection section of slurry flowing through the detection section corresponding to the current detection adjustment point; S3, calculating the overall average concentration of the gangue slurry in the detection section and a segregation coefficient representing the upper and lower layering degree of the gangue slurry based on all the acquired concentration detection data, wherein the segregation coefficient is calculated according to the difference value between the average concentration of the sensor positioned at the lower side of the detection section and the average concentration of the sensor positioned at the upper side of the detection section and the overall average concentration; S4, comparing the overall average concentration obtained by the detection section with a preset concentration t