56results about How to "Improve fouling problem" patented technology

The invention discloses a nanometer coating protective pipe prepared by nanometer squama coating and production technique of coating, wherein, the nanometer coating protective pipe consists of three parts of a pipe body, a basal layer and a function layer. The basal layer is the substrate of the nanometer coating and coated on the surface of the pipe body when contacts with a metal base body. The function layer is the facial layer of the nanometer coating and coated on the surface of the basal layer when the function layer contacts with corrosive medium. The nanometer coating the protective pipe disclosed in the invention changes the surface characteristic of the steel pipe products, and acquires a novel characteristic completely different from the original steel pipe products and enables the products to satisfy the need of people towards hi-tech development. The nanometer coating can provide oil pipe products with good performance in resisting corrosion, paraffin, scale and abrasion, so as to greatly prolong the maintenance period of the pipeline products in oil extracting wells, water injecting wells and conveying pipelines of oil fields.

The invention discloses a technique for simple substance salt separation with co-production of sodium sulfide from high-salinity wastewater containing sodium sulfate and sodium chloride and belongs to the field of sewage treatment. The technique comprises the following steps: producing sodium sulfate with a primary evaporative crystallization method, removing SO4<2-> from the high-salinity wastewater with a chemical precipitation method, producing sodium chloride with a secondary evaporative crystallization method and producing sodium sulfide from final mother liquor with a cooling method. The whole treatment process is required to be controlled under a slightly alkaline condition. According to the technique, sodium sulfate and sodium chloride in the high-salinity wastewater can be recycled effectively, residual mother liquor can be used for producing sodium sulfide, most impurities can be removed, zero emission can be realized, the environmental protection pressure and the wastewater treatment cost are reduced greatly, and new economic benefit points can be created.

The invention discloses an online water quality monitoring and treating system for circulating water of a fully-automatic cooling tower. The online water quality monitoring and treating system comprises a signal acquisition unit, a PLC unit and an operation unit, wherein the signal acquisition unit is used for acquiring various water quality signals of the circulating water of the cooling tower and outputting the various water quality signals; the PLC unit is used for outputting corresponding control signals and alarm signals according to the received water quality signals; the operation unit is used for realizing automatic pollution discharge and automatic adding of various corresponding chemical agents according to the various received control signals. The online water quality monitoring and treating system can effectively improve the operation stability of the circulating water.

The invention discloses a stepped utilization method of steam in ammonium phosphate production, which comprises the following steps: 1. three-time steam generated by two-stage concentration is introduced into a heat exchanger to heat and pre-concentrate raw material of thin phosphoric acid, and after heating, the steam at the terminal is discharged and condensed, the temperature of which is lowered; and 2. part reaction heat generated by neutralization of raw material of the phosphoric acid and ammonia is still used for secondarily concentrating ammonium phosphate slurry, and the other part of the steam continues to heat the raw material of the phosphoric acid by single-pass falling film evaporation so as to further pre-concentrate the phosphoric acid. The method has the advantages that: (1) by lowering the vaporization temperature at the terminal to 50DEG C-60DEG C, low-temperature pre-concentration of the phosphoric acid is realized, which saves the consumption of primary steam and reduces the emission of waste heat and gas; (2) auxiliary equipment runs steadily, forced circulation has high evaporation intensity, circulating power consumption is reduced, and the size of the equipment and pipelines is reduced; (3) the operation temperature is obviously reduced, and the corrosion and scaling on a heating surface caused by a concentrated medium are improved; and (4) the concentration operation expands towards a low-temperature area, thus improving the functions of the equipment.

The invention discloses a method for separating and purifying acetoin in fermentation liquor. The method includes the step of adding inorganic salt and a weak polar organic solvent are added into the fermentation liquor for extraction, wherein the addition amount of the inorganic salt accounts for 25-125% of the volume of the fermentation liquor, and the volume ratio of the organic solvent and the fermentation liquor is (1-2):1. The weak polar organic solvent is one of ethyl acetate, methyl tertiary-butyl ether, butyl acetate, dimethyl carbonate and diethyl carbonate. By means of the method, an extraction phase containing acetoin hardly contains pigment, residual sugar and organic acid impurities, an extraction solution can be directly rectified, and the scaling phenomenon is not likely to happen to a column reactor in the rectification process. Polarity of the solvent in use is small, the specific heat capacity is low, the upper phase water content is low, energy consumption for recycling is low, and acetoin loss in the recycling process is small. Operation is easy, and the method is an acetoin separation and extraction technology with industrial application prospects.

The invention relates to a heat exchange and flow guide structure of a hot water storage tank, which realizes temperature layering of thermal mediums in a hot water storage tank in the using process and avoids mixing of cold water and hot water in the hot water storage tank, so that the water outlet temperature of a heat exchanger is stably maintained above the required temperature for a long time, the produced water which can meet using requirement is increased and the heat utilization efficiency in the hot water storage tank is sufficiently improved.

The invention discloses a fan and wet pad cooling device for a bus station and based on a solar technology. The fan and wet pad cooling device comprises an arc-shaped ceiling of the bus station, a photoelectric conversion unit is arranged on the upper part of the ceiling, and a wet pad unit is arranged at the lower part of the ceiling and is further connected with a water supplying unit which is located at the bottom of the bus station through a pipeline; and the photoelectric conversion unit comprises a solar cell panel which is erected on the ceiling, and the solar cell panel is sequentiallyconnected with a controller, an inverter and a storage battery through circuits. According to the fan and wet pad cooling device for the bus station, own installation design of the bus station is notaffected, and an air conditioner system is replaced by the wet pad unit; and the principle of direct evaporative cooling is utilized, so that air is cooled through a wet film and is slantly sent downward to the place where people feel comfortable through a cross-flow fan, and cooling and refreshing are brought for people waiting for a bus in the outdoor space in high-temperature and hot weather conditions.

The invention relates to a feed method for coal tar. After the pressure of a coal tar raw material is boosted by a hydrogenation reaction raw material booster pump, the coal tar raw material enters a hydrogenation reactor without any indirect heat exchange; and before the pressure of the coal tar raw material is boosted, the coal tar raw material can be hot stream from a fractionating tower. The method can avoid a high-pressure heat-exchange temperature-rise process of the coal tar, eliminate the problem of fouling of high-pressure coal tar heat exchangers, reduce the hydrogenation catalyst bed pressure drop, slow down the coking, and prolong the operation cycle.

A self-cleaning enhanced heat transfer device inside a tube comprises multiple rotary members (2) mounted inside a heat transfer tube (1). A fixing frame (3) is mounted at each end of the heat transfer tube (1). A supporting shaft (4) passes through the heat transfer tube (1) and the two ends of the supporting shaft (4) are fixed at the fixing frames (3). The rotary members (2) are pivotally mounted at the supporting shaft (4). A limiting member (5) is mounted between at least a pair of adjacent rotary members (2) for separating the ends of the adjacent rotary members (2).

The invention provides a wastewater treater. The treater comprises an upper head, a shell and a lower head, wherein a gas outlet is arranged on the upper head; a concentrated liquid outlet is arranged on the lower head; the shell comprises a vapor-liquid separationsection, a material distribution section, an evaporation section and a liquid storage section along a liquid-phase material flowing direction; a feeding port is arranged on the shell above the material distribution section; a heating vapor inlet and a condensate outlet are arranged on the shell of the evaporation section, and an auxiliary vapor inlet are arranged on the shell of the liquid storage section. The treater provided by the invention can improve the wastewater evaporation area and the liquid film updating speed, and increases a heat transfer rate and a heat transfer coefficient of the vapor and the wastewater.

The invention relates to the field of circular cooling water treatment, and discloses a method for treating circulating cooling water. The method comprises the steps that fresh water is adopted as cooling water of an air precooling system, and first agentia is put in the air precooling system; water flowing out of the air precooling system is taken as supplementary water of a circulating cooling water system, and second agentia is put in the supplementary water of the circulating cooling water system; the sum of calcium ion concentration and total alkalinity of the fresh water is less than orequal to 100 mg/L; the first agentia comprises a copolymer of crylic acid and 2-methyl-2'-acrylamide propane sulfonic acid, zinc salt and organic phosphonic acid. According to the method, by changingthe water supplementing point of the fresh water and reasonably adding the scale and corrosion inhibition components, the scaling and corrosion problems of the air precooling system and the circulating cooling water system are solved, the adding amount of the agentia is lower, and the method is especially beneficial for reducing production cost.

The invention provides an evaporative crystallization method for salinity wastewater. The method comprises the following steps: S1, preheating salinity wastewater and then degassing; S2, carrying outevaporation treatment on degassed wastewater in an amorphous seeding operation mode to obtain secondary steam and discharge water in the evaporation process; in addition, carrying out real-time adjustment of the discharge amount of the discharge water according to the incoming water quality of the degassed wastewater so as to control concentration multiple of an evaporation system; S3, carrying out crystallization treatment on the discharge water in the amorphous seeding operation mode to obtain secondary steam and strong brine in the crystallization process, adding a defoaming agent into a crystallizer body for defoaming, concentrating the defoamed strong brine by starting a hydroseparator and starting a centrifuge for centrifugal dewatering to obtain solid carnallite; besides, in the process of running the hydroseparator, carrying out real-time adjustment on the discharge amount of supernate in the hydroseparator according to the water quality of the discharge water to control the concentration multiple of the crystallization system. The method disclosed by the invention solves the operational stability problem of the amorphous seeding evaporative crystallization system.

The invention belongs to the technical field of chemical engineering, and particularly relates to a scaling control method for a debutanizer bottom reboiler of a light hydrocarbon recovery device. Themethod comprises the steps that a scale inhibitor is injected in the feeding stage of a debutanizer, and based on the feeding amount of the debutanizer, the injection amount of the scale inhibitor is25-35 mg/kg; a corrosion inhibitor can be injected into a gas-phase volatilization section at the top of the debutanizer, and the injection amount of the corrosion inhibitor is 3-8 mg/kg based on theflow of liquefied gas at the top of the debutanizer; and a temperature and pressure reducer can also be used on a heat source steam pipeline, and deoxygenated water is injected into the temperature and pressure reducer. The method effectively improves the scaling problem of the debutanizer bottom reboiler, reduces the scaling rate of the debutanizer bottom reboiler, reduces the overhaul frequencyof the debutanizer, and prolongs the operation period of the debutanizer.

The invention discloses an anti-scaling adding device for a sodium hypochlorite generator. The anti-scaling adding device comprises a shell body, wherein a heating mechanism covers on an outer wall ofthe shell body; the shell body is internally provided with a scaling filtering screen; a liquid inlet pipe is arranged at the top of the shell body and is used for communicating a chamber between aninner wall of the shell body and the scaling filtering screen; a liquid discharging pipe is arranged at the bottom of the shell body and is used for discharging saline water filtered by the scaling filtering screen; an output end of the liquid discharging pipe is connected with an input end of a cooling mechanism; and an output end of the cooling mechanism is communicated with the sodium hypochlorite generator. The anti-scaling adding device has a working principle that scaled impurities including calcium and magnesium ions and the like in the saline water are transformed into a visible form from an invisible form under a high-temperature condition of 50 to 100 DEG C and water scales are directly formed on the scaling filtering screen and are convenient for post-period cleaning; and the descaled saline water is conveyed into the cooling mechanism and is cooled, and then is introduced into the sodium hypochlorite generator to be subjected to electrolysis reaction, so that the surface ofan electrode of an electrolytic tank can be effectively prevented from being scaled and the electrolysis efficiency is ensured.

The invention discloses a vacuum low-temperature evaporation concentration treatment method for landfill leachate, which is characterized in that: the landfill leachate is separated into steam and concentrated liquid by low-temperature evaporation in a vacuum state through a vacuum evaporator, and the operating pressure of the vacuum evaporator is controlled at 4.5‑7.5kPa, the evaporation temperature is controlled at 30‑40°C. Because the invention adopts low-temperature evaporation, it reduces fouling of the evaporator and facilitates cleaning, prevents ammonia nitrogen from overflowing with steam, improves heat exchange efficiency, reduces heat loss, has low energy consumption, and low leachate treatment cost.