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A functional control system for the production of polycarboxylate superplasticizer

A control system and water reducing agent technology, applied in the field of functional control systems, can solve problems such as difficulty in judging abnormal reaction end points and excessive content, and achieve the effect of improving quality fluctuations and realizing performance

Active Publication Date: 2016-09-28
WUHAN HUAXUAN HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional production process, it is usually checked when selecting raw materials to detect Cl - and SO 4 2- Whether the content is qualified, but there are some problems in this way, because raw material testing usually adopts sampling testing, and raw materials with qualified samples may contain Cl - and SO 4 2- The content exceeds the standard, after the synthesis of the water reducer, the Cl is detected - and SO 4 2- It is easy to exceed the standard, and can only be applied to projects that do not have strict requirements on harmful ions, or samples are taken at a certain point in the synthesis process to detect Cl - and SO 4 2- concentration, but due to the addition of raw materials, Cl - and SO 4 2- The content is changing, it is difficult to judge whether there will be abnormality at the end of the reaction

Method used

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  • A functional control system for the production of polycarboxylate superplasticizer
  • A functional control system for the production of polycarboxylate superplasticizer
  • A functional control system for the production of polycarboxylate superplasticizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Synthesis of PC-1. Transfer the A1 material stored in the A1 material storage to the A material box, and carry out the synthesis reaction according to the above process. The flow rate on each pipeline can be calculated according to the amount of raw materials and the time through each pipeline, and the power of the metering pump can be set by the computer. Realize the adjustment of the flow rate of the conveying liquid.

[0035] According to the standard of GB8077-2000, the fluidity of the cement slurry is tested, and the results show that the fluidity of the cement slurry using PC-1 is basically not lost for 2 hours.

Embodiment 2

[0037] Synthesis of PC-2. Transfer the A2 material stored in the A2 material storage to the A material box, and carry out the synthesis reaction according to the above process. During the process of adding liquid alkali, it is found that Cl will appear when adding liquid alkali. - If the content exceeds 0.1%, the computer controls the metering pump to shut down, and uses alkali with higher purity (lower chloride ion content) to adjust the pH.

[0038] Cl in online detection - The sensor shows that the chloride ion content of the synthesized PC-2 is lower than 0.1; the slump and water reducing rate of concrete are measured according to GB8076-2008 and GB50081-2002, and the results show that the water reducing rate of PC-2 has reached more than 40%.

Embodiment 3

[0040] Synthesis of PC-2. The A2 material stored in the A2 material storage is transported to the A material box, and the synthesis reaction is carried out according to the above process. Before adding liquid alkali, due to the Cl brought in by the raw material - content is relatively high, and the addition of liquid caustic soda with higher purity cannot effectively control Cl - Continue to add ordinary liquid caustic soda to adjust the pH, and the synthesized water reducer is recorded as PC-4. At this time, the water reducer cannot be used as PC-2 for project A, and can be considered as a substitute for PC-3 Engineering B.

[0041] In the project, PC-4 is used instead of PC-3, and the results show that the replacement effect is better.

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Abstract

A functional control system for the production of polycarboxylate water reducers, the system consists of a main reactor, a digital display timer, a temperature sensor, a pH sensor, a viscosity sensor, an ion sensor, a double dropper, 5~ Composed of 8 raw material storages, lye storage, single dripper, material box, 6~8 metering pumps, 6~8 sets of pipes and fittings, with continuously adjustable performance of water reducer, on-line monitoring, It has 5 functions of automatic flow control of conveying liquid, detection and control of harmful ions and self-compensation of temperature. The system can continuously adjust the performance of polycarboxylate superplasticizer by adjusting the type and content of raw materials. It can detect the physical parameters such as temperature, pH value and viscosity in the main reactor online. The flow rate controls these parameters with high precision, which reflects the content of harmful impurities in the main reactor in real time and can control the content of harmful impurities within a limited range, which improves the problem of large quality fluctuations of multicomponent components in the traditional chemical industry.

Description

technical field [0001] The invention relates to a functional control system for the production of polycarboxylate water reducers, which can be applied to the field of liquid chemical product production, and can realize continuous adjustment of the performance of the water reducer by adjusting raw material components and dosage, and online detection and Precisely control product performance. Background technique [0002] Polycarboxylate superplasticizer has a high and relatively long-lasting water reducing effect, and the production process is pollution-free. It is an indispensable material for high-strength and high-fluidity concrete. Due to the different properties of concrete raw materials and construction requirements, different requirements are put forward for the performance of water reducing agents, such as high water reducing rate, super early strength, high slump retention, air-entraining type, shrinkage reduction type and mud resistance, etc. Polycarboxylate Due to...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C04B24/32C04B103/30
Inventor 马保国代柱端马玲汪杰方晨炜
Owner WUHAN HUAXUAN HIGH TECH