The sedimentation process of coal slurry water is influenced by numerous factors and has complex mechanisms. Its nonlinear large hysteresis characteristics pose great challenges to optimization control, making it a current research hotspot. This paper takes the typical slime treatment preparation plant as object, and, on basis selecting raw quantity, flocculation dosage, coagulation overflow turbidity, ash content, underflow concentration, quantity key variables, establishes quality control...

The tubular flocculation reactor is a new and efficient device for treating algae-containing wastewater. introduction of bubbles during the reaction process can effectively shorten time required floc separation. However, impact on formation removal in not well understood. To further clarify effect reactor’s operation, this study employed uniform experimental design, varying flow rate, chemical dosage, bubble distance, injection rate to examine influence under different operating conditions....

The tubular flocculation reactor is a new device for the efficient treatment of algal wastewater, which has characteristics high removal efficiency and small dosage chemicals. mechanism influence flow field on formation floc in pipeline not been clarified. In this study, effects distribution, reagent concentration were investigated by means experiment numerical simulation. results showed that surface was related to shape generated floc. When size greater than 900µm fractal dimension 1.25,...

Hydrocyclones are extensively known as important separation devices which used in many industrial fields. However, the general method to estimate device performance is time-consuming and has a high cost. The aim of this paper was investigate blockage diagnosis for lab-scale hydrocyclone using vibration-based technique based on wavelet denoising discrete-time Fourier transform method. results indicate that farther away installation location from feed inlet more regular frequency is, reveals...

The online measurement of coal ash has overcome the shortcomings chemical tests. However, there could be large fluctuations and errors in results monitors because transient change quality resulting from different geological conditions mining process. In this study, to resolve problems dual-energy γ-ray monitor Linhuan Coal Preparation Plant, we investigated internal factors, such as composition multimineral multicoal, external moisture impurities, which affect monitor. Furthermore, developed...

This paper investigated a precise algorithm combining X-ray Fluorescence and Neural Network (XRF-NN) for predicting ash content. The 261 sets of XRF tests show that the 34 elements in chosen Guqiao coal can be categorized as major, secondary tiny elements, whose cumulative ratio were ~95%, 4-5% <1%, respectively. Referring to machine learning theory, construction strategy Element-Ash dataset was determined viz. value determination → standardization division optimization generalization...

A novel hydrocyclone including a cylindrical screen embedded in conventional (CH), named three products (TPHS), has been successfully designed. In TPHS, the combination of centrifugal classification and screening was employed to separate particles. this paper, Grey theory, as an effective means laws both complex uncertainty system’s behavior with small samples, used investigate operational (feed concentration feed pressure) structural (aperture size, spigot diameter, vortex finder diameter)...

Coal-based activated carbons (CACs) have excellent valuable applications, and been industrially produced. However, ultra-fine coal-based (UCACs) their removal of methylene blue (MB) rarely reported in the present literature. Two kinds UCACs were obtained this paper adsorption test MB was carried out. The performance on UCAC simulated by Grand Canonical Monte Carlo (GC-MC) method. experimental results validated molecular simulation, mechanism investigated. amount MB, d50, specific surface...

In the flotation process, gas-liquid properties and bubble system greatly influence mineralization. order to clarify how mechanism applies closure characteristics of an annular jet mixed flow zone on inspiratory performance system, different degrees velocity field ratio in were investigated using numerical simulation. The variations size distribution, rising velocity, gas content under levels measured with a high-speed dynamic camera technology. results confirmed that when improved, inlet...

Three products hyrdrocyclone screen (TPHS) has been proposed for particle separation based on size. In TPHS, a cylindrical was embedded in conventional hydrocyclone (CH) to combine the centrifugal classification and screening The industrial application of TPHS indicates its better device performance than CH. Although, earlier studies reveal some common understanding information absent air column remains unknown. Hence, combination physical experiment numerical simulation considered involving...

Three products hydrocyclone screen (TPHS) can be considered as the combination of a conventional and cylindrical screen. In this device, particles are separated based on size under centrifugal classification coupling screening effect. The objective work is to explore characteristics fluid flow in TPHS using computational dynamics (CFD) simulation. 2 million grid scheme, volume fraction model, linear pressure–strain Reynolds stress model were utilized generate economical grid-independence...

This study intends to use machine learning method solve the problem of predicting number word guessing and difficulty in natural language. Firstly, this smoothed data according COF method. According images sample autocorrelation function partial function, ARMA model is constructed coefficient AMRA calculated, contest people on March 1, 2023 predicted drop [18002,20622]. Second, based seven attributes word, XGBoost classification used predict value first attempt, then prediction results other...

The introduction of air into a submerged annular jet will result in dispersion the jet, which affect degree enclosure gas–water mixing zone nozzle, and then have significant impact on suction formation foam system floatation process. A numerical simulation method is used to analyze characteristics distribution axial flow velocity jets, gas–phase volume, turbulence intensity nozzle with different air–liquid ratios, thereby reveal mechanism whereby gas–containing jets affects zone. results...

The shortcomings of the density control system for heavy media suspension in current coal preparation plant were introduced. intelligent separation suitable different quality characteristics LinHuan Coal Preparation Plant was proposed. mainly composed following parts: relationship between ash and mineral content, automatic identification raw production source information, adjustment online analyser parameters, closed loop based on clean content. After applied. processed information ratio...

Machine vision was utilized in this study to accurately classify the low concentration slurry. Orthogonal experiment L

Polyacrylamide (PAM) is widely used as flocculant in coal preparation. A protoplast fusant with enhanced degradation ability of PAM was obtained by intergeneric fusion between Rhodopseudomonas spheroids and Bacillus subtilis. The preparation optimised inactivation both parents performed different ways. abilities domesticated R. spheroides, B. subtilis mixed bacteria (v/v, 1.00) were compared fusant. results showed that the optimal dosage for spheroides determined to be 20.00% sucrose, 1.00...

The three products hydrocyclone screen (TPHS), a branch of the hydrocyclone, effectively removes fish-hook effect, which has been used in industrial field. current cylindrical TPHS generates characteristic flow known as underflow, significant impact on device performance. To investigate behaviour fluid passing through screen, combination dynamic analysis and numerical simulation was used. permeating process abstracted by simple fan mode this work to generate flow-rate equations driving-force...

This paper proposes a fuzzy comprehensive evaluation of ultrafine powders, namely, yield and quality value-based feature selection. Three indicators reflecting product were selected to construct simple practical protocol. The weight set the indices calculated based on analytic hierarchy process (AHP) method. value was worked out as only index for product. best comminution condition will be established through comparison values. Single-factor experiments orthogonal main influencing factors...

Abstract In this paper, the vortex-induced vibration experiment of risers with different wall thicknesses in wave-flow combined water flume was carried out. The dynamic strain sensing technology adopted. sensitivity and micro evolution pattern riser VIV response relative to thickness were examined by varying various models, comparing dimensionless root mean square strain, frequencies trajectories risers. results indicate that does not have a large influence on Strouhal numbers risers, which...

Abstract Diameter design of the riser is a very important link in offshore engineering, which will affect series parameter changes riser. In this paper, variable-diameter with different cross-sections spliced by sections diameters 18, 25, and 30. wave-flow combined flume, dynamic response parameters such as strain-time history curve root-mean-square dimensionless strain were obtained changing outflow velocity diameter riser, effect variable on vortex-induced vibration was studied detail. The...