52results about How to "Reduce fouling speed" patented technology

The invention discloses a cleaning solution for removing calcium carbonate scale and a preparation method and application of the cleaning solution, and belongs to the field of chemical descaling. Thecleaning solution comprises, by mass, 3%-8% of phosphorus-free organic acid complexing agent, 10%-25% of phosphorus-free chelating agent, 2%-6% of penetration cosolvent, 0.05%-0.15% of corrosion inhibitor, and the balance water. The corrosion inhibitor is oleic acid imidazoline corrosion inhibitor and / or thiazole corrosion inhibitor. The penetration cosolvent is prepared by the following steps that anionic surfactant, polyols and clean water are added into a reaction still and heated to 30-50 DEG C, stirring is conducted for 20-40 minutes, sodium hexametaphosphate, sodium but and the clean water are added, the temperature is reduced to 15-25 DEG C, stirring is conducted for 30-50 minutes under the constant temperature conditions, and the penetration cosolvent is obtained; and the mass ratio of the anionic surfactant, the polyols to the clean water added for the first time is 1:10-20:20-30, the mass ratio of the sodium but, the sodium hexametaphosphate to the clean water added for the second time is 1:40-50:80-200, and the mass percent of the sodium but accounted for the penetration cosolvent is 0.16-0.3%. The cleaning solution is high in scale dissolving rate, good in scale inhibition effect, safe and environmentally friendly, and good in biodegradability.

The invention discloses a method for controlling precipitation of crystal alkali in an evaporator. The evaporation mother solution after carbonate and sulfate are precipitated and separated is partially returned to one of final three-effect evaporators in the evaporation process to reduce the crystal precipitation amount of the carbonate and the sulfate in the final three effects. The method can be used for the countercurrent flow operation of the evaporation process. The evaporation mother solution is partially returned into the three-effect evaporators in the evaporation process to reduce the crystal precipitation amount of the carbonate and the sulfate in the final three effects. The ratio of the part of the evaporation mother solution returned to the evaporation process to the total amount of the evaporation mother solution is 0.5-1.5: 3. The method is suitable for a plate type falling film evaporator, and also suitable for an external heating type natural circulating evaporator. After the method is adopted, compared with the prior art, the precipitation amount of the crystal alkali on the heating surface of the evaporator is remarkably reduced, the scaling speed of sodium carbonate and sodium sulfate on the high temperature effect heating surface is slowed down, and the period of washing a boiling tank is prolonged so that washing water entering the production flow is reduced and the consumption of steam is reduced. Because the scales of the sodium carbonate and the sodium sulfate on the heating surface of the evaporator are reduced, the evaporation efficiency is greatly improved, and the average productivity of the evaporator is improved by 10 to 15 percent compared with the prior art.

The invention relates to an oriented heat absorption film material and a spreading method thereof. The oriented heat absorption film material is prepared through a method including the steps of S1, grinding, by weight, 20-55% of crystalline manganese oxide, 5-25% of tantalum carbide, 5-10% of hafnium carbide, 2-20% of fluorphlogopite mica and 5-30% of crystalline iron oxide into a powder materialwith granularity of 100-250 mesh, wherein the total weight percentage of all the components is 100%; S2, heating the powder material obtained through grinding in the step S1 in a resistance furnace at950-1200 DEG C for 6-8 hours to obtain a solid material of the oriented heat absorption and energy conservation film material, and adding pure water accounting for 10-30% of the total weight of the solid material and inorganic high-temperature-resistant liquid gel accounting for 10-20% of the total weight of the solid material to be evenly mixed in a mixer for 7-10 h so as to obtain the orientedheat absorption film material. The film material is high in radiation intensity, generates a radiation magnetic field perpendicular to the tangential direction of the surface of a heated body under the effect of a high-temperature heat source, and enhances the heat energy absorption efficiency of a heated medium and greatly improves the heat energy transmission efficiency when directly acting on the heated medium.

The invention discloses a method and a system for the scale prevention and descaling of a film type evaporator. Two fluids sequentially pass a heat exchange surface at different flow rates, one is a main fluid with a relatively larger flow but a low flow rate, and the other is an auxiliary fluid with a relatively smaller flow but a high flow rate. First, the main fluid is sprayed on the heat exchange surface. Then, the auxiliary fluid is jet on the heat exchange surface at the high flow rate so as to scour off scale formed on the heat exchange surface. The method and the system have the beneficial effects that scaling speed is reduced, and descaling efficiency is increased; and under the condition of normal evaporation, the whole heat exchange surface is strongly interfered by the fluid which is jet at the high rate, and at a result of strong interference, the heat exchange efficiency of the main fluid is enhanced.

The invention discloses a humidifier, a control method thereof, an air conditioner and a storage medium, and belongs to the technical field of humidifiers. The humidifier includes a cylinder, a heating electrode, and a controller, wherein the heating electrode is used to generate heat using water in the cylinder as a conductive medium, and the controller is used to obtain the current of the heating electrode when the humidifier operates for a preset time. Attenuation rate, according to the relationship between the current attenuation rate of the heating electrode and the preset current attenuation rate, determine the water injection period of the cylinder. Also provided are a control method based on the humidifier, an air conditioner, and a storage medium. Beneficial effects of the present invention: the humidifier can automatically adjust the water injection cycle of the cylinder according to the different water quality conditions in different regions, so as to achieve the balance between delaying the fouling speed of the electrode and ensuring the humidification operation time, so as to improve the humidification performance of the humidifier .