Method for preparing foam concrete foaming agent by sludge protein

Abstract

The invention provides a method for producing a protein foam concrete foaming agent by sludge, which comprises the following steps of: adding 5-6 percent of lime into sludge containing protein; carrying out high-temperature hydrolysis for 1-2 hours in a reactor; filtering and removing slag to obtain a protein solution mixture; concentrating, and then adding 0.1-0.2 percent of protective agent and adding 3.0-3.6 percent of xanthan gum to prepare the sludge protein foam concrete foaming agent. The foaming agent has the expansion rate of foam more than 50 and the stable time more than four hours and achieves the production requirement. After foaming, the foaming agent is added with No. 42.5 cement, perlite, pulverized fuel ash and water to be uniformly mixed and can be directly used as heat insulation materials of a roof, an inner wall and an outer wall and a filling material in construction or after foaming by an air tank, the sludge protein foam concrete foaming agent is uniformly mixed with rapid-hardening sulphoaluminate, the pulverized fuel ash, a fiber and water; and a sludge protein foam concrete energy-saving plate or a sandwich plate and a sound insulating material used for a high-rise building wall or a high-noise environment can be prepared in the processes of casting and maintenance.

Description

technical field [0001] The invention relates to a building material, foaming agent for foamed concrete, in particular to a method for preparing foamed concrete foaming agent by utilizing sludge protein. Background technique [0002] Foamed concrete is a building material widely used in modern society, and a large amount of foaming agent is required to produce foamed concrete. [0003] Currently commonly used foaming agents are mainly various surfactants. At present, domestic foaming agents are mainly rosin gum foaming agent, waste animal hair foaming agent, resin soap foaming agent, lignin sulfonate, hydrolyzed blood glue foaming agent, petroleum aluminum sulfonate foaming agent, protein hydrolyzate and polymer surfactants. Domestic foaming agents generally have few functions, poor stability, and low product strength. Foaming agents developed abroad such as Italy and Japan are mostly protein-based, with a large number of foams, good stability, and high product strength. ...

AI Technical Summary

Problems solved by technology

Although these foaming agents are effective, they are expensive to produce and pollute the environment.

[0004] A large amount of sludge will be produced in the process of wastewater treatment. The sludge is mainly composed of microorganisms, contains a large amount of protein, and also contains some protozoa, metazoans, algae, organic matter, inorganic matter, etc.; Toxic chemicals, pathogenic microorganisms, and heavy metal ions have both the danger of chemical pollution and the danger of biological pollution, which have begun to cause secondary pollution in cities