50results about How to "Eliminate environmental risks" patented technology

The invention relates to an electrochemical recycling method and an electrochemical recycling device for claus tower tail gas by cooperating with absorption liquid. According to the technical solution, the cooperated absorption liquid inside a liquid storage tank (9) subjected to absorption reaction of claus tail gas enters an inner rotational flow type electrochemical reactor from a liquid inlet (11) through an infusion pump (8), and a reaction product, namely elemental sulfur, is discharged to a sulfur collecting tank (7) after being collected by a sulfur separator (6) at the bottom of the inner rotational flow type electrochemical reactor and discharged to a buffer tank (10) from an overflow pipe (2) at the top of the inner rotational flow type electrochemical reactor after being oxidized by a barrel type electrode (4). Then, the cooperated absorption liquid subjected to electrode oxidation discharged into the buffer tank (10) is regulated at 20-90 DEG C, the chemical components of the cooperated absorption liquid subjected to regulation are the same as those of the cooperated absorption liquid before the absorption reaction of claus tail gas so as to be recycled for the absorption reaction of claus tail gas. The electrochemical recycling method and the electrochemical recycling device have the advantages of low operating cost, convenience in operation, high sulfur recovery rate, few byproducts, long service life of device and suitability for industrial application.

The invention discloses a microbiological treatment technology for waste mud generated in drilling operation of petroleum and natural gas, and relates to the technical field of pollution treatment of exploration drilling for petroleum and natural gas. The technology is executed according to the following steps: a, preparing a pool for performing microbiological treatment on waste mud; b, paving the bottom of the pool with a plurality of transverse pipes, connecting the transverse pipes with vertical pipes, and perforating the transverse pipes; c, paving the bottom of the pool with cobblestones, and controlling the paving thickness of the cobblestones to be larger than the pipe diameter of the transverse pipes; d, paving with a non-woven fabric layer on the cobblestones; e, paving with sand on the non-woven fabric; f, paving with a prepared waste mud mixture on the sand; and g, paving with natural soil on the waste mud mixture, and planting plants. The technology helps to reduce the anaerobic area of a landfill pool, and is capable of finished degradation process in a relatively short time, enabling the mixture to reach national soil three-level standard and eliminating environment risk.

The invention discloses a method for treating nitrogen-containing chlorine-containing high-concentration refractory organic wastewater. The method can simultaneously remove total nitrogen, total phosphorus and COD in the nitrogen-containing chlorine-containing refractory organic wastewater. The core of the method is that electrochemical flocculation, electrochemical Fenton, electrochemical oxidation and electrochemical reduction processes are integrated in a reactor through in-situ conversion anodes to achieve advanced treatment of the nitrogen-containing chlorine-containing refractory organicwastewater. Based on the method, the invention further provides an integrated electrochemical reactor which is widely applicable to removal of total nitrogen, total phosphorus and COD in various nitrogen-containing chlorine-containing high-concentration refractory organic wastewaters (such as domestic sewage, industrial wastewater and landfill leachate). The reactor is simple in operation, runs stably, and is suitable for promotion in actual engineering.

The invention discloses an environmental protection resource utilization process and system of hazardous waste and waste oil barrels. The process provided by the present invention covers the steps of impurity removal, rust and paint removal, crushing, primary cleaning, secondary cleaning, rinsing, drying, packing and steelmaking in sequence. In the system applying the above process: artificial cleaning station, rust removal and paint removal machine, shredder, first-level acoustic drum cleaning machine are connected by belts; first-level ultrasonic drum cleaning machine, second-level ultrasonic drum cleaning machine, leaching The machine and dryer are driven by screws; the dryer, baler and steelmaking furnace are connected by belts. The process and system provided by the invention have low energy consumption, resource saving and environmental protection, and can simultaneously realize the dual goals of "eliminating the hazardous waste characteristics of waste oil drums" and "recycling utilization".

The invention discloses a styrene exhaust gas treatment method including the following steps: carrying out countercurrent contact of styrene exhaust gas with an alkaline solution of potassium permanganate, carrying out an oxidation reaction of styrene with the alkaline solution of potassium permanganate in the contact process, and after completion of the reaction, discharging the exhaust gas having styrene consumed into the atmosphere. With adopting of the technological process of spraying the potassium permanganate solution to absorb styrene, styrene-containing exhaust gas generated by refinery enterprise styrene materials and generated in highway car loading, wharf shipment, storage tank breathing and other various places can be treated at the same time, and the method has higher treatment efficiency, besides, is simple in flow, small in occupied land area and low in energy consumption, can meet the national latest environmental protection standard requirements for styrene emission limit values, effectively reduces the styrene emission and eliminates environmental risks and security risks at refinery enterprise styrene workplaces.