CN111762997A - Flocculant quantity control method for waste slurry treatment - Google Patents

Abstract

The invention relates to a flocculant quantity control method for waste slurry treatment, which comprises the following steps: setting a standard charge amount of the slurry, obtaining a real-time charge amount of the waste slurry through a charge tester, and comparing the real-time charge amount with the standard charge amount of the slurry in real time to determine whether to put in the flocculant and the amount of the flocculant; the advantages are that: whether the adding amount of the flocculating agent is proper or not is judged by detecting the charge amount in the slurry, the adding amount of the flocculating agent can be accurately controlled, dynamic control over adding of the flocculating agent is achieved, the shortage or excess of adding of the flocculating agent is avoided, the quality of a subsequent slurry treatment process is guaranteed, and reliable technical support is provided for regeneration of the slurry.

Description

Flocculant quantity control method for waste slurry treatment

Technical Field

The invention relates to the technical field of waste slurry treatment, in particular to a flocculant quantity control method for waste slurry treatment.

Background

Environmental protection supervision and environmental protection standards are becoming stricter, which causes a great deal of mines to be shut down, and the ubiquitous purchase of roadbed fillers such as slag, aggregate and the like becomes a common phenomenon in the current engineering, and the engineering progress is seriously influenced. Due to the supply and demand phenomenon, a large amount of unqualified materials enter the market, so that the construction quality of the roadbed is difficult to meet the design requirement, and the construction quality is influenced; meanwhile, due to unbalanced supply and demand, the prices of roadbed fillers such as slag, aggregate and the like rise all the way, so that the construction cost generally rises.

On the other hand, due to the continuous progress of urbanization in recent years, the urban construction waste soil such as the waste slurry dehydrated soil generated by various constructions, foundation pit excavation and the like is not piled or piled and has high absorption price, which brings great trouble to governments and construction enterprises, and how to generate great economic value for the urban construction waste soil becomes a current difficult problem.

In the regeneration process of the waste slurry, a flocculating agent is put into a slurry tank to promote the dehydration of the slurry, and then the slurry is treated by a series of processes to finally obtain the roadbed filling material. The reaction of the flocculant and the mud is realized by the following principles: the mud particles are positively charged, the flocculating agent is negatively charged, and the mud particles are polymerized together by overcoming electrostatic repulsion through neutralization of the positive and negative charges, so that the purpose of mud-water separation is achieved.

In the existing waste slurry treatment process, no accurate control method exists for the feeding amount of the flocculating agent, in most cases, a reasonable feeding value is estimated according to the treatment experience of a project manager, feeding is carried out according to the feeding value, or a certain initial proportioning index is used for a long time, but if the estimated feeding amount is too small, flocculation of slurry is easy to be out of place, the subsequent process is affected, and if the estimated feeding amount is too much, waste of the flocculating agent is caused.

In addition, the amount of charge of the waste slurry with different mineral contents or different types of minerals or different stacking times (the waste slurry is inevitably stored for a certain time due to the arrangement of construction period after being transported to a processing plant) is different, and the estimated amount of charge is a constant proportional value, which inevitably results in that the flocculation of the slurry cannot reach the optimal state.

Based on this, the present disclosure is thus directed.

Disclosure of Invention

The invention aims to provide a flocculant quantity control method for waste slurry treatment.

In order to achieve the purpose, the technical scheme of the invention is as follows:

a method for controlling the amount of a flocculant for treating waste slurry comprises a central computer, a sludge storage tank, a charge tester, a flocculation tank and a flocculant feeding device, wherein the central computer is used for controlling the charge tester, analyzing a charge test result and sending a feeding signal to the flocculant feeding device; the quantity control method comprises the following steps:

s01, discharging the recovered mud into a mud storage pool for flocculation, and inputting a standard mud charge quantity Astd and a charge quantity A1 contained in each kilogram of flocculant into a central computer, wherein the charge quantity is positive and negative when positive;

s02, measuring the real-time charge quantity A2 of the mud in the mud storage tank by using a charge tester, and feeding back the test result to a central computer;

s03, comparing the real-time charge quantity A2 with the mud standard charge quantity Astd by the central computer, and if A2 is less than or equal to Astd, directly entering the step S08, otherwise, entering the step S04;

s04, the central computer analyzes the dosage K of the flocculant to be added, and the analysis formula is

K=（A2-Astd）/∣A1∣；

S05, the central computer sends a throwing instruction to the flocculant throwing device according to the throwing dosage K;

s06, pumping the slurry in the sludge storage tank into a flocculation tank, and putting a flocculating agent with the dosage of K into the pumped slurry by a flocculating agent putting device in the pumping process;

s07, finishing flocculation after the flocculation time T;

and S08, entering the next mud treatment process.

The invention has the advantages that: whether the adding amount of the flocculating agent is proper or not is judged by detecting the charge amount in the slurry, the adding amount of the flocculating agent can be accurately controlled, dynamic control over adding of the flocculating agent is achieved, the shortage or excess of adding of the flocculating agent is avoided, the quality of a subsequent slurry treatment process is guaranteed, and reliable technical support is provided for regeneration of the slurry.

Drawings

FIG. 1 is a schematic flow chart of a quantity control method according to the present invention.

Detailed Description

The present invention will be described in further detail with reference to examples.

The invention provides a flocculant quantity control method for waste slurry treatment, which comprises a central computer, a sludge storage tank, a charge tester, a flocculation tank and a flocculant feeding device, wherein the central computer is used for controlling the charge tester, analyzing a charge test result and sending a feeding signal to the flocculant feeding device, as shown in figure 1. The size of the mud storage pool needs to be set according to the testing capability of the charge tester so as to ensure the accuracy of charge testing. The quantity control method comprises the following steps:

s01, discharging the recovered mud into a mud storage pool for flocculation, and inputting a standard mud charge quantity Astd and a charge quantity A1 contained in each kilogram of flocculant into a central computer, wherein the charge quantity is positive and negative when positive; the slurry colloid is positive charge, the flocculating agent is negative charge, and the charge amount contained in each kilogram of flocculating agent is a fixed value and can be directly measured, the standard charge amount of the slurry is determined according to the strength of the roadbed filling required by actual engineering, the slurry flocculation effects are different, finally, the strength of the roadbed filling is also different, and the standard charge amount of the slurry is specified according to enterprise standards and is also a fixed value;

s02, measuring the real-time charge amount A2 of the mud in the corresponding mud storage pool by using a charge tester, and feeding back the test result to a central computer;

s03, comparing the real-time charge quantity A2 with the mud standard charge quantity Astd by the central computer, and if A2 is less than or equal to Astd, directly entering the step S08, otherwise, entering the step S04;

s04, the central computer analyzes the dosage K of the flocculant to be put, wherein the unit of K is kilogram, and the analysis formula is K = (A2-Astd)/| A1 |; since A1 is a negative value, the absolute value of A1 is required in the formula;

s05, the central computer sends a throwing instruction to the throwing device according to the throwing dosage K;

s06, pumping the mud in the mud storage tank into a flocculation tank, and in the pumping process, adding a flocculating agent with the dosage of K into the pumped mud by a flocculating agent adding device;

s07, finishing flocculation after the flocculation time T;

and S08, entering the next mud treatment process.

The above-mentioned embodiments are merely illustrative of the inventive concept and are not intended to limit the scope of the invention, which is defined by the claims and the insubstantial modifications of the inventive concept can be made without departing from the scope of the invention.

Claims (1)

1. A method for controlling the amount of a flocculant for treating waste slurry is characterized by comprising a central computer, a sludge storage tank, a charge tester, a flocculation tank and a flocculant feeding device, wherein the central computer is used for controlling the charge tester, analyzing a charge test result and sending a feeding signal to the flocculant feeding device; the quantity control method comprises the following steps:

s01, discharging the recovered mud into a mud storage pool for flocculation, and inputting a standard mud charge quantity Astd and a charge quantity A1 contained in each kilogram of flocculant into a central computer, wherein the charge quantity is positive and negative when positive;

s02, measuring the real-time charge quantity A2 of the mud in the mud storage tank by using a charge tester, and feeding back the test result to a central computer;

s03, comparing the real-time charge quantity A2 with the mud standard charge quantity Astd by the central computer, and if A2 is less than or equal to Astd, directly entering the step S08, otherwise, entering the step S04;

s04, the central computer analyzes the dosage K of the flocculant to be added, and the analysis formula is

K=（A2-Astd）/∣A1∣；

S05, the central computer sends a throwing instruction to the flocculant throwing device according to the throwing dosage K;

s06, pumping the mud in the mud storage tank into a flocculation tank, and in the pumping process, adding a flocculating agent with the dosage of K into the pumped mud by a flocculating agent adding device;

s07, finishing flocculation after the flocculation time T;

and S08, entering the next mud treatment process.

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