5results about How to "Process operation is stable" patented technology

The invention discloses a wastewater treatment method based on improved wet oxidation reaction, which comprises the following steps: step 1, carrying out tempering modification treatment on wastewater, and preheating by adopting a multi-stage heat exchanger; 2, introducing the preheated wastewater and an oxidizing agent into a wet oxidation tower filled with a solid catalyst, and gradually heating to a required reaction temperature to carry out a wet oxidation reaction; 3, carrying out gas-liquid separation on a gas-liquid mixture flowing out of the wet oxidation tower, feeding the separated gas phase and liquid phase into the multi-stage heat exchanger in the step 1, carrying out heat exchange with the wastewater in the step 1, and preheating the wastewater to raise the temperature; and step 4, separating the cooled gas phase and liquid phase again, feeding the separated gas phase into the wastewater in the step 1 to carry out tempering modification on the wastewater, and further carrying out deep treatment or discharging the separated liquid phase. The method can effectively degrade organic pollutants in wastewater, and is low in energy consumption and operation cost and stable in process operation.

The utility model discloses an improved A2O biological tank which comprises a biological tank body, one side of an inner cavity of the biological tank body is fixedly connected with a selection frame, a partition plate is fixedly connected between the rear part of the inner cavity of the biological tank body and the rear part of the selection frame, one side of the partition plate is fixedly connected with a baffle plate, and the other side of the partition plate is fixedly connected with a baffle plate. An anaerobic zone is arranged in the biological tank body and is positioned behind the selection frame. The utility model relates to the technical field of biological tanks. According to the improved A2O biological tank, in-frame water inlet, aeration stirring and sludge backflow are selected; stirring and refluxing in the anaerobic zone, the anoxic zone and the aerobic zone; aeration is carried out through a plurality of aeration pipes, and static precipitation is carried out; therefore, the improved A2O biological tank aims at efficient biological nitrogen and phosphorus removal, the process operation is reliable, the use of chemical agents can be well saved, in addition, the operation management is convenient, the improved process is high in impact load resistance, the operation is more stable, and the sludge is high in fertilizer efficiency and can be used as sludge compost.

The invention discloses an in-situ coupling synergistic hardness removal and resource utilization process. The process comprises a hardness removal process section and a concentration and salt separation process section, the hardness removal process section comprises a hardness adsorption module, an analysis module and a calcium recovery module; the hardness adsorption module is composed of hardness adsorption assemblies and is filled with a functional adsorbent, the analysis module is used for recovering the performance of the adsorbent of the hardness adsorption module, and the calcium recovery module is used for treating analysis waste liquid generated by the analysis module and the hardness adsorption module; salt extracted in the concentration and salt separation process section is used as a resolving agent in the hardness removal process section; the method comprises the following steps: extracting alkalinity ions from raw water, using the alkalinity ions as a precipitating agent, treating the hardness extracted by a hardness adsorption module through a calcium recovery device, recycling calcium ions, further treating the hardness in the raw water by using ions in the raw water, and realizing the purpose of no addition of chemicals, and the method is a mutual coupling and cooperative treatment process, which couples an adsorption technology and a salt separation purification technology for the first time; and by cooperating with a particle membrane filtration technology, the technological process is shortened, and waste resource utilization is realized.

The present application relates to polyester recycling, and provides a method for improving the yield and purity of regenerated BHET. After glycolysis of waste polyester in the presence of a metal catalyst, most of the free glycol is removed by evaporation under reduced pressure. A chelating agent composed of a polycarboxylic acid chelating agent and an organic phosphonic acid compound is added to the glycolysis solution, and a fixed bed circulation contact of a solid-supported chelating agent with polycarboxylic acid groups supported on a porous carrier is used to remove metal ions. Subsequently, the glycol is further removed by thin film evaporation to obtain a BHET-rich glycolysis solution. Finally, the distillate is collected in a short path distiller according to the set switching conditions of BHET content and acid value to obtain a high-purity BHET product. This method can inhibit re-polymerization and thermal degradation, reduce metal residues and oligomer content, and improve the yield and purity of BHET.

The utility model relates to a kind of robot press line, especially in the technical field of steel drum processing equipment.It includes flange feeding mechanism, conveyor, barrel cover turnover mechanism, unstacking robot, carrying robot, locking punch press, stacking robot.Overcome the current barrel cover in the process of locking flange, usually adopt manual stamping mode, this mode labor intensity is big, labor cost is high and there is the problem of hidden danger.