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Method for preparing high-efficiency water reducing agent from wastewater

A high-efficiency water-reducing agent and waste water technology, which is applied in the field of concrete admixture preparation, can solve the problems of inability to meet the needs of use, low water-reducing rate of the water-reducing agent, complicated preparation process, etc. good compatibility

Inactive Publication Date: 2022-02-15
山东基业新型建材科技有限责任公司
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation process of aliphatic water reducer is complicated, time-consuming, high in production cost, and the product performance needs to be improved. Its preparation method, this method uses lignosulfonate as raw material, the production cost is high, the water reducing rate of the prepared water reducer is low, can not meet the use demand, and often produce waste water in the production process, wherein waste water is pesticide, medicine , dyes and intermediates containing formaldehyde, methanol, ketone, phosphate, sulfonate lignin, six-membered heterocyclic rings, etc., the difficulty of wastewater treatment has certain pollution to the environment. Therefore, using wastewater and waste liquid as raw materials to prepare reducing Water agent, which can reduce production costs, pretreat waste liquid, degrade harmful substances, and meet the needs of use

Method used

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  • Method for preparing high-efficiency water reducing agent from wastewater
  • Method for preparing high-efficiency water reducing agent from wastewater

Examples

Experimental program
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Effect test

Embodiment 1

[0039] see figure 1 and figure 2 shown;

[0040] A method for preparing a high-efficiency water reducer by utilizing waste water, the method comprising the following steps:

[0041] Step 1, selecting raw materials: including several parts of acetone, formaldehyde, sodium sulfite, sodium tripolyphosphate, composite oxidant, reducing agent and flocculant, and several parts of waste liquid and water;

[0042] Step 2, pretreatment of waste liquid to degrade harmful substances:

[0043] (1) Pump the waste liquid into the adjustment tank, and adjust the pH value of the waste water to 3.5-5.5;

[0044] (2) Pump the waste liquid from the adjustment tank in (1) into the reactor, then add an appropriate amount of anionic polyacrylamide into the reactor and stir it, and let it stand at room temperature for 5-10 minutes to degrade most of the organic matter and harmful materials;

[0045] (3) Pump the pretreated waste liquid in the reaction kettle in (2) into the coagulation sedimen...

Embodiment 2

[0065] Weigh each ingredient according to the following weights:

[0066] 100 parts of acetone, 300 parts of formaldehyde, 100 parts of sodium sulfite, 40 parts of sodium tripolyphosphate, 5 parts of composite oxidant, 5 parts of reducing agent, 10 parts of flocculant, waste liquid (30%-35% of lignin content, wt%) 300 parts -500 parts, several parts of water.

[0067] Prepare the method for utilizing waste water to prepare superplasticizer of the present invention according to the following steps:

[0068] Step 1, selecting raw materials: including several parts of acetone, formaldehyde, sodium sulfite, sodium tripolyphosphate, composite oxidant, reducing agent and flocculant, and several parts of waste liquid and water;

[0069] Step 2, pretreatment of waste liquid to degrade harmful substances:

[0070] (1) Pump the waste liquid into the adjustment tank, and adjust the pH value of the waste water to 3.5-5.5;

[0071] (2) Pump the waste liquid from the adjustment tank in (...

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Abstract

The invention belongs to the technical field of preparation of concrete admixtures, and particularly relates to a method for preparing a high-efficiency water reducing agent by utilizing wastewater, which comprises the following steps: 1, selecting raw materials including a plurality of parts of acetone, formaldehyde, sodium sulfite, sodium tripolyphosphate, a composite oxidant, a reducing agent and a flocculating agent as well as a plurality of parts of waste liquid and water; 2, pretreating the waste liquid to degrade the harmful substances; 3, synthesizing polycarboxylic acid mother liquor; and 4, compounding the polycarboxylic acid mother liquor. The method has the beneficial effects that waste liquid is used as a production raw material, so that the production cost is effectively reduced; and the waste liquid is pretreated to degrade harmful substances. The method is green and environment-friendly, and is convenient for wastewater treatment; the polycarboxylic acid mother liquor is compounded, so that the adaptation effect of the polycarboxylic acid water reducing agent and cement can be effectively improved, and the polycarboxylic acid water reducing agent has good compatibility with various types of cement. Besides, the slump retention performance of the concrete is good, and the construction time of the concrete is prolonged.

Description

technical field [0001] The invention belongs to the technical field of preparation of concrete admixtures, and in particular relates to a method for preparing high-efficiency water reducers by utilizing waste water. Background technique [0002] Polycarboxylate superplasticizer is a high-performance superplasticizer and a cement dispersant used in cement concrete. It is widely used in highways, bridges, dams, tunnels, high-rise buildings and other projects. In many concrete projects, traditional high-efficiency concrete such as naphthalene series is increasingly unable to meet engineering needs due to limitations in technical performance. A new generation of water reducer that has attracted much attention at home and abroad, polycarboxylate high-performance water reducer, because it has truly designed an effective molecular structure based on the mechanism of dispersed cement, has a super-dispersion type, and can prevent concrete slump loss. It does not cause obvious retard...

Claims

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Application Information

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IPC IPC(8): C04B24/24C04B103/30
CPCC04B40/0046C04B2103/302C04B24/18C04B24/24C04B24/08C04B22/16
Inventor 付国旗付道知
Owner 山东基业新型建材科技有限责任公司