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Preparation method of quick-drying composite sludge dehydrating agent

A technology of dehydrating agent and sludge, which is applied in the field of preparation of rapid-drying composite sludge dehydrating agent, can solve the problems of low sludge dehydration efficiency, achieve the effects of improving dehydration effect, reducing floor space, and enhancing drying performance

Pending Publication Date: 2020-10-02
陈细强
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The technical problem to be solved by the present invention: Aiming at the problem of low dewatering efficiency of existing sludge, a preparation method of a fast-drying composite sludge dehydrating agent is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In parts by weight, weigh 20 parts of potato starch, 16 parts of sodium methacrylate, 0.2 parts of sodium persulfate, and 120 parts of deionized water, add 1 / 3 of the potato starch to deionized water, and add 1 / 3 3 sodium persulfate, stir at 280r / min for 30min in a water bath at 80°C to obtain gelatinized starch, add sodium methacrylate to the remaining 2 / 3 deionized water, and stir at 200r / min at room temperature After 10 minutes, sodium methacrylate solution was obtained, and the sodium methacrylate solution was slowly added to the gelatinized starch at a rate of 30 mL / min, and the remaining 2 / 3 sodium persulfate was added. Stir the unit at a speed of 300r / min for 1 hour to obtain the reaction solution, put the reaction solution in a vacuum filter, filter at room temperature, take the filter cake, dry it in a blast drying oven at 40°C for 1 hour, and cool it at room temperature. Obtain the grafted starch resin; then weigh 15 parts of lignin fiber and 30 parts of dehyd...

Embodiment 2

[0037] In parts by weight, weigh 25 parts of potato starch, 20 parts of sodium methacrylate, 0.2 parts of sodium persulfate, and 150 parts of deionized water, add 1 / 3 of the potato starch to deionized water, and add 1 / 3 3 sodium persulfate, stir at 290r / min for 35min in a water bath at 85°C to obtain gelatinized starch, add sodium methacrylate to the remaining 2 / 3 deionized water, and stir at 220r / min at room temperature After 12 minutes, the sodium methacrylate solution was obtained, and the sodium methacrylate solution was slowly added to the gelatinized starch at a dropping rate of 35mL / min, and the remaining 2 / 3 sodium persulfate was added, and the solution was heated in a water bath at 55°C. Stir the unit at a speed of 325r / min for 1 hour to obtain the reaction solution, put the reaction solution in a vacuum filter, filter at room temperature, take the filter cake, dry it in a blast drying oven at 45°C for 1 hour, and cool it at room temperature. Obtain the grafted starch...

Embodiment 3

[0039] In parts by weight, weigh 30 parts of potato starch, 24 parts of sodium methacrylate, 0.3 parts of sodium persulfate, and 180 parts of deionized water, add 1 / 3 of the potato starch to deionized water, and add 1 / 3 3 sodium persulfate, stirred at 300r / min for 40min in a water bath at 90°C to obtain gelatinized starch, added sodium methacrylate to the remaining 2 / 3 deionized water, and stirred at 240r / min at room temperature After 15 minutes, the sodium methacrylate solution was obtained, and the sodium methacrylate solution was slowly added to the gelatinized starch at a rate of 40 mL / min, and the remaining 2 / 3 sodium persulfate was added. Stir the unit at a speed of 350r / min for 2 hours to obtain the reaction solution, put the reaction solution in a vacuum filter, filter at room temperature, take the filter cake, dry it in a blast drying oven at 50°C for 2 hours, and cool it at room temperature. Obtain the grafted starch resin; then weigh 20 parts of lignin fiber and 40 ...

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Abstract

The invention relates to a preparation method of a quick-drying composite sludge dehydrating agent, and belongs to the technical field of dehydrating agents. According to the invention, polyacrylamideand grafted starch resin are used as raw materials for preparing a quick-drying composite sludge dehydrating agent. Under a certain condition, reactive groups of the polyacrylamide can react to generate a water absorbent capable of adsorbing moisture in the sludge; since the sludge is formed by dispersing a plurality of particles, polyacrylamide can be adsorbed on the surfaces of particles of thesludge; through the adsorption, large steric hindrance can be generated on the surfaces of the sludge particles; therefore, the sludge particles are prevented from contacting with water molecules again; the dehydrating effect of the sludge dehydrating agent can be improved, small-particle sludge can form flocs, the occupied area of the sludge is reduced, the sludge particles are prevented from being further close to water, and therefore the drying performance of the sludge dehydrating agent is enhanced; and starch is a high polymer of glucose, is polysaccharide and has good water absorption performance.

Description

technical field [0001] The invention relates to a preparation method of a fast-drying composite sludge dehydrating agent, belonging to the technical field of dehydrating agents. Background technique [0002] Silt usually refers to the mixture (sediment, clay, organic matter and various minerals) in the water body, which sinks to the bottom under long-term physical, chemical and biological effects to form sediments. Water bodies such as rivers and lakes produce silt. River silt is the core part of regulating the pollutant components of the overlying water body. There is a balance of absorption and release between it and the overlying water body. The absorption will also increase; conversely, when the concentration of pollutants in the overlying water body decreases, the silt will release pollutants to the overlying water body to maintain the dynamic balance between the water body and silt. In addition, silt is also the central link of the nutrient cycle, the main concentrat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/148
CPCC02F11/148
Inventor 陈细强
Owner 陈细强
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