4results about How to "Solve intractable" patented technology

The present application belongs to the field of environmental functional materials and water treatment technology, and aims to provide a preparation method of ceramic membrane based on endogenous pore forming and catalysis of sludge containing algae. The method comprises the following steps: taking dewatered sludge of water supply plant in algae outbreak period of water source, drying, ball milling and sieving to obtain sludge powder; soaking and washing after using organic acid with complexing ability as heavy metal removal agent, pre-carbonization treatment, dry pressing into embryo, sintering into membrane sheet; primary activation treatment in weak oxidizing strong acid, washing and heating treatment for secondary activation to obtain ultrafiltration ceramic membrane product. The method is simple in operation steps, easy to implement and green and environmental protection; the prepared ceramic membrane has good separation performance and high mechanical strength, can catalyze oxidizing agent commonly used in water treatment while filtering, and free radicals are generated by decomposition to degrade organic matter; or catalyze common cleaning agent sodium hypochlorite during membrane cleaning to generate free radicals to strengthen the cleaning effect.

The application provides a system treatment process for fluorine-containing wastewater, which comprises the following steps: a fluorine-containing wastewater treatment process, a sludge treatment process, a defluorination filter material regeneration process and a sludge waste liquid treatment process. The system treatment process for fluorine-containing wastewater has the advantages of low sludge yield, low flocculant consumption, low treatment cost, high adsorption capacity, greatly prolonged adsorption time of the adsorbent, reduced regeneration frequency, no discharge of regeneration liquid, and effectively solved problem of difficult treatment of by-products of traditional treatment processes.

The application relates to a kind of shield foam wall post-grouting material using siltstone slag and a preparation method, and belongs to the technical field of shield tunnel construction.The shield foam wall post-grouting material using siltstone slag comprises slurry and water glass, and the slurry comprises cement 5-10% by mass fraction, fly ash 13-18%, sodium dihydrogen phosphate 0.1-0.6%, bentonite 4-8%, bubble liquid 0.5-2%, pretreated siltstone 34-39%, xanthan gum 1-5%, and the rest is water, and the volume ratio of the slurry to water glass is 1:0.1-0.14.The application replaces river sand with siltstone, solves the problem of difficult disposal of waste slag, is an economic and environmentally-friendly method for recycling waste soil, and has good environmental benefits.

The application discloses a pile foundation abandoned steel reinforcement cage taking-out device and a construction method, and relates to the technical field of building construction equipment. The pile foundation abandoned steel reinforcement cage taking-out device comprises a salvager, and the salvager comprises a connecting cylinder, a plug-in column and clamping claws. The connecting cylinder is fixedly installed at one end of the plug-in column, the end of the plug-in column away from the connecting cylinder is provided with a plug-in tip, and the clamping claws are provided with two and are respectively installed at the left and right sides of the plug-in tip. The two clamping claws are located at the same height. The connecting cylinder is provided with an installation inner cavity, and the sidewall of the connecting cylinder is provided with a connecting lock column. The application has the advantages of simple structure, reliable function, convenient insertion of the salvager into the steel reinforcement cage and clamping connection with the steel reinforcement cage, thereby being used for the taking-out operation of the steel reinforcement cage, and solving the problem that the steel reinforcement cage in the pile hole is difficult to handle when the installation is not in conformity with the regulations. The tip of the clamping claw can be outwardly opened, so that the salvager and the steel reinforcement cage can be conveniently and stably clamped, the problem that the steel reinforcement cage is dropped due to loose clamping and thus repeated operation is required is avoided, the working hours are reduced, and the efficiency is improved.