77results about How to "Achieve the effect of treating waste with waste" patented technology

The invention discloses a treating method for efficiently catalyzing and oxidizing chlor-alkali industrial waste water. In the method, sodium hypochlorite in the chlor-alkali industrial waste water is decomposed mainly by adding a nickel oxide catalyst with an efficient surface; and simultaneously a small amount of other pollutants in the waste water is degraded. The treating method for efficiently catalyzing and oxidizing the chlor-alkali industrial waste water of the invention comprises the following step of: making sodium hypochlorite-containing alkaline waste water continuously flow through a catalytic oxidation reaction bed filled with a catalyst from the bottom to the top at an air speed of between 1.6 and 2.6 h<-1>.

The invention relates to a method for removing phosphorus from wastewater by utilizing coal ash, belonging to the field of environmental technologies. The method comprises the following steps: (1) providing phosphorus-contained wastewater containing at least one organic phosphorus, and adjusting the value of the wastewater to weak acidity; (2) adding the coal ash into the pH-adjusted wastewater, and carrying out heating under stirring and allowing the coal ash and the wastewater to react and adsorb; and (3) after the reaction is completed, separating the wastewater and the coal ash. The method provided by the invention utilizes the coal ash to remove most of inorganic phosphorus and a part of the organic phosphorus in the wastewater, and the total phosphorus-removal efficiency can reach more than 50%. After phosphorus removal, the coal ash solves the problem of stability due to high content of active calcium oxide in coal ash, and can be used as a raw material of a building material for utilization, so the effect of using wastes to treat the wastes is achieved.

The invention relates to a recycling treatment system and a recycling treatment method of dewatered sludge. The recycling treatment system is composed of an incineration boiler, a first flue gas waste heat exchanger, a sludge storage pool, an alkaline conditioning chamber, a thermal cracking chamber, a dewatering chamber, a second flue gas waste heat exchanger, a waste heat drying chamber and an anaerobic fermentation tank. The recycling treatment method comprises the following steps: firstly, performing alkaline conditioning and thermal cracking on the dewatered sludge and then dewatering to obtain a solid phase and a liquid phase, performing drying treatment on the solid phase with thermal cracking flue gas waste heat as a heat source to obtain the dried sludge, and producing biogas from the liquid phase with drying flue gas waste heat as the heat source. The recycling treatment method realizes the removal of easily removable moisture in the sludge and also realizes sludge stabilization; meanwhile, the recycling treatment method is capable of promoting further efficient removal and biochemical degradation of the moisture content in the sludge; and as a result, the problems of low drying efficiency, easy binding and easy explosion are solved, and efficient recycling utilization of the sludge based on phase separation is realized.

The invention relates to a solidification and stabilization method for washing sludge of a port engineering vehicle. The water content of the washing sludge is 88-93%. The method comprises the following steps: by using a mixture of furnace slag and silicate cement as a solidification and stabilization agent, adding the solidification and stabilization agent into the washing sludge, and uniformly stirring to obtain a solidified body capable of realizing direct landfilling or recycling, wherein the furnace slag is coal-fired furnace slag, fly ash or a combination thereof, and the solid content of the furnace slag is above 90%; and by taking the weight of the washing sludge as a reference, the adding amount of the furnace slag is 60-120%, and the adding amount of the silicate cement is 4-13%. According to the solidification and stabilization method provided by the invention, the coal-fired furnace slag is used for solidification and stabilization of sludge, thus effectively preventing the washing sludge from causing secondary pollution in the solidification treatment process, and realizing the recycling of the solid waste.

The present invention provides a direct contact evaporation treatment apparatus and method by utilizing flue gas heat, wherein the apparatus comprises: a first evaporator, which provided with a firstfeed port, a first discharge port, a first gas inlet and a first gas outlet, wherein the first gas inlet is used for receiving high temperature flue gas, and the first gas outlet is connected to an incinerator; a second evaporator, which is provided with a second feeding port, a second discharging port, a second air inlet and a second air outlet, wherein the second gas inlet is used for receivinghigh-temperature flue gas, the second feeding port is connected with the first discharging port and used for receiving a first-stage concentrated solution formed by evaporating to-be-treated liquid inthe first evaporator from the first evaporator, and the second exhaust port is connected with a flue gas treatment system of the incinerator or directly leads to the outside atmosphere. Unified treatment of two secondary pollution sources of high-temperature flue gas and high-salinity wastewater is achieved, the effect of treating waste with waste is achieved, consumption of combustible gas is reduced, and the treatment cost of high-salinity water is reduced.