31results about How to "Slow down the fouling rate" patented technology

The invention discloses an organic pollution and blocking control method of a reverse osmosis membrane. The method comprises the steps of preliminarily determining a feeding proportion of active carbon and ferric chloride through determination results of molecular weight of organic matter in an influent water sample and a three-dimensional fluorescence spectrogram of the sample, determining feeding concentration intervals of the active carbon and ferric chloride according to a DOC (dissolved organic carbon) concentration, obtaining corresponding DOC removal rates, determining the best active carbon feeding concentration A and the best ferric chloride feeding concentration B by stabilizing a minimum dose required for removing DOC, feeding the active carbon of the concentration A into reverse osmosis influent for absorption for 0.5-1h, and feeding ferric chloride of the concentration B for coagulation to remove the active carbon and the residual organic matter. The method has the characteristics of low cost, low energy consumption, simplicity in operation and the like, and achieves the purposes of stabilizing the quality of the RO (reverse osmosis) system influent, reducing a pollution and blocking speed of an RO system, improving operating stability of the RO system, and prolonging operating time of the RO system, thereby lowering operating cost of the RO system by removing organic pollutants from the RO system influent.

A catalyst composition comprising a minor amount of a low acidity, highly dealuminated ultra stable Y zeolite having an alpha value of less than about 5, preferable less than about 3 and Broensted acidity measured by FT-IR from about 1 to about 20, preferably from about 1-10 micro mole / g, a homogeneous, amorphous silica-alumina cracking component having an SB ratio of from about 0.7 to about 1.3,wherein a crystalline alumina phase is present in an amount of no greater than about 10%, preferably no greater than 5% and a catalytic amount of hydrogenation component selected from the group consisting of a Group VI metal, a Group VIII metal, and mixtures thereof is disclosed. The present invention provides for a process for converting hydrocarbonaceous oils comprising contacting the hydrocarbonaceous oils with the catalyst under suitable hydrocarbon conversion conditions. Such processes in include, but are not limited to, single stage hydrocracking, two-stage hydrocracking, series-flow hydrocracking, mild hydrocracking, lube hydrocracking, hydrotreating, lube hydrofinishing, hydrodesulphurization, hydrodenitrification, catalytic dewaxing and catalytic cracking.

The invention discloses a flue gas desulfurization synergist for a wet desulfurization system, and a preparation method and the application thereof. The flue gas desulfurization synergist for the wet desulfurization system consists of the following components in percentage by weight: 1 to 49 percent of magnesium salt, 8 to 66 percent of sodium salt and 2 to 43 percent of organic amine. The preparation method of the flue gas desulfurization synergist comprises the following step: mixing and uniformly stirring the magnesium salt, the sodium salt and the organic amine to obtain the flue gas desulfurization synergist for the wet desulfurization system. The flue gas desulfurization synergist for the wet desulfurization system, disclosed by the invention, is applied to wet flue gas desulfurization to effectively remove sulfur dioxide in flue gas and can promote SO2 adsorption and dissolution of limestone, so that the desulfurization degree is improved by 3 to 15 percent and the dissolving speed of the limestone is improved by 6.6 to 20 percent; moreover, desulfurization reaction time is shortened, so that operating cost of flue gas desulfurization is reduced; and meanwhile, the scaling speed of calcium also can be retarded, so that reliability of the system is improved.

The invention discloses a system and method of a power station boiler for treating and recycling heavy oil wastewater. The system comprises a heavy oil thermal recovery well, a silicon removal reactor and a softening reactor which are connected with one another in sequence, wherein the softening reactor is connected with a liquid inlet of an evaporator, a condensed water outlet of the evaporator is sequentially connected with a biological aerated filter and a desalting device, and a water producing outlet of the desalting device is connected with a power station boiler and steam turbine system; a silicon removal medicament dosing opening is formed in the silicon removal reactor, a softening medicament dosing opening is formed in the softening reactor, and a steam exhaust outlet of a steam turbine in the power station boiler and steam turbine system is connected with a heat source inlet of the evaporator; and a superheated steam outlet of the power station boiler in the power station boiler and steam turbine system is connected to the heavy oil thermal recovery well. By adopting the system disclosed by the invention, co-production of water, heat and electricity can be achieved, the heat energy can be effectively used, and the cycle thermal efficiency can be improved.

The invention relates to a barium strontium sulphate scale inhibitor for an oil field and an application thereof. The barium strontium sulphate scale inhibitor comprises the following components in percentage by weight: 0.05-0.10% of polyepxoysuccinic acid, 0.01-0.03% of polyamino polyether methylene phosphonate, 0.02-0.05% of a ZG-558 scale inhibitor, 0.01-0.02% of quaternary ammonium salt and the balance of water; and working concentration is 50-120mg / l when the barium strontium sulphate scale inhibitor is used for inhibiting barium strontium sulphate scale at a gathering and transportation station of the oil field. The barium strontium sulphate scale inhibitor provided by the invention can effectively realize barium strontium sulphate scale inhibition with high sulphuric acid content (SO4<2-> is less than or equal to 1600mg / l) and high barium content (the ratio of Ba<2+> to Sr<2+> is less than or equal to 1800mg / l), and scale inhibition rate is more than 70%.

The invention provides an evaporative water chilling unit and a control method. The evaporative water chilling unit comprises a compressor (1), an evaporative condenser (2), an air-cooling type precooling heat exchanger (8) located between the compressor (1) and the evaporative condenser (2), and a water-cooling type precooling heat exchanger (9) arranged between the compressor (1) and the evaporative condenser (2) and connected with the air-cooling type precooling heat exchanger (8) in parallel. Compared with an air-cooling single-precooling mode in the prior art, the water precooling mode isadded, as the power consumption of the water precooling mode is smaller than that of the air precooling mode, power consumption of the unit is reduced while the unit is subjected to scale inhibition,and the energy efficiency of the unit is improved; and meanwhile, as the air precooling and water precooling are conducted at the same time to cool refrigerants, the cooling and heat releasing efficiency of the refrigerants is effectively improved, and the heat exchange capacity of the unit is improved.

The present invention relates to boiler feed water treating technology, and is especially water treating method for directly air cooled steam drum boiler. Under the reductive condition, the condensed water from the condensing water tank is added with ammonia before entering the boiler directly under the condition of closing the oxygen discharging door of deaerator and the water hydrogen conductivity is controlled below 0.2microS / cm. In case of poor water quality, the oxygen discharging door is opened to convert into reductive mode. The present invention alters the traditional concept that dissolved oxygen will result in corrosion, and has double compact oxide film formed on surface of metal to inhibit the flow corrosion in thermal system, fine treatment of condensed water for long running time, no use of carcinogenic hydrazine and lowered ammonia adding amount for environment protection and health, and raised equipment utilization.

The invention discloses a wastewater treatment method, and specifically in particular relates to an upgrading treatment method for a sewage treatment plant in a park based on a membrane coagulation reactor-ozone-biological activated carbon technique. The method comprises the following steps: introducing wastewater of the park after pretreatment to an MCR (Membrane Chemical Reactor) system to befor treatinged, so that the turbidity of contributed water is less than or equal to 0.5NTU (Number of Transfer Units) and accords with some other indexes; then, oxidizing the contributed water of the MCR system in an O3 oxidizing system; introducing the contributed water of the O3 oxidizing system to a BAC (Basic Aluminum Chloride) system, and remaining the water treated in the BAC system for 1-5 hours; and thoroughly decomposing pollutants in wastewater through synergistic effect of activated carbon adsorption and micro-biological degradation, and so that the contributed water stably contributing water to meets the discharge demands. The method disclosed by the invention has the advantages that the operational stability of the system is improved; ozone tail gas is used for aeration of the BAC system, so that the tail gas treatment problem is solved; the aerating efficiency of the BAC system is improved; the system is in modular configuration, is automatically controlled and strong in maintainability.

The invention discloses a method for reducing the boiler scaling rate. The method specifically comprises the following steps: S1, a variable frequency water pump is mounted in front of a water inlet of a full-automatic water softening device, the frequency of the variable frequency water pump is set to be 32 Hz-40 Hz, so that the water inlet pressure of the full-automatic water softening device is 0.30 MPa-0.38 MPa; S2, to-be-treated water enters the full-automatic water softening device through the variable frequency water pump; and S3, softened water treated by the water softening device enters a boiler. According to the method, resin can recover the original exchange and treatment capacity after regeneration, the aging rate of the resin can be slowed down, the water softening capacity of the full-automatic water softening device can be uppermost, finally, the quality of the softened water is improved, the rate of scaling in the boiler is reduced, the heat-transfer property and the thermal efficiency of the boiler are improved, and fuel energy waste is reduced.