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

The invention relates to an undee helical groove heat exchange tube and a heat exchanger thereof; the surface of the heat exchange tube is provided with a helical groove protruding inward the tube; two ends of the heat exchange tube body along the length direction are straight tube sections; the middle section is an undee bended tube section; the undee shape is formed that the section center of the heat exchange tube bends upwards and downwards along the horizontal axis; the upper maximal bended range and the lower maximal range are the same; compared with the prior art: 1. Liquid in a bended flow channel is forced to change the flowing direction continuously by the bend setting of the heat exchange tube, thereby promoting the onflow flowing of the liquid; 2. The invention has the effect of strengthening the flowing and promoting the full and uniform mixing of the flowing of refrigerant outside the tube; 3. On the premise of not increasing the length of the heat exchanger, the length of the heat exchange tube is increased; 4. Compared with the prior art, the heat exchange efficiency of the heat exchanger of the invention improves by 5 percent to 10 percent. The invention is in particular suitable for an exhaust gas recycling cooler of an automobile engine to reduce the discharge of automobile tail gas pollutant or is used as an engine turbine pressurization intercooler to improve the performance of the engine.

The invention relates to a pipe impulse flow generator, belonging to the heat-matter transmission high-efficiency energy-saving device of natural gas and oil. The invention can reduce the resistance of transmitting liquid, save energy, decrease the deposition of olefin, and improve the heat efficiency of transmitting heat and matter. The invention comprises a upper nozzle, a self-excite chamber, a lower nozzle, and a pipe which are sequentially sealed, fixed and connected; the inlet of upper nozzle and the outlet of pipe are individually connected to the inlet and outlet pipe. The invention can use said generator to transform the continuous liquid via the self-excite chamber into impulse liquid without any auxiliary device, and improved amplitude of output pressure as 15-30%, increased impulse frequency from tens to hundreds, to reduce the resistance, save energy consumption and apply variable industries.

The invention discloses a circulation cooling device for a chute of a soda recovery furnace. A cooling water channel is provided with a desalted water inlet, a drain outlet, an overflow vent, a sealing water pipe and a liquid level meter interface, wherein the sealing water pipe is inserted below the liquid surface of the cooling water channel, the liquid level meter interface is connected with aliquid level transmitter; a desalted water outlet at the bottom of the cooling water channel is connected with a circulation cooling water pipe, the outlet of a frequency variable water pump is connected to a cooling water inlet of a heat exchanger, a cooling water outlet of the heat exchanger is connected to the water inlet of a chute water jacket at the lower end of the chute water jacket by virtue of the circulation cooling water pipe, the water outlet of the chute water jacket at the upper end of the chute water jacket is connected to the sealing water pipe of the cooling water channel, the desalted water inlet is arranged at the top of the cooling water channel, the desalted water pipe is used for introducing the desalted water into the cooling water channel by virtue of the desaltedwater inlet, and the desalted water pipe is provided with a regulating valve. The circulation cooling device disclosed by the invention has simple structure, low operation energy consumption, less water discharge and automatic operation; and a crack of the chute water jacket can be timely alarmed, and an accident is prevented.

The invention discloses a method for removing fluorides from coal conversion wastewater, particularly fluorides in high-concentration brine of the coal conversion wastewater. The method comprises thespecific steps: draining the wastewater into a treatment tank, then, adding crystals AlCl3, and lowering the fluoride ion concentration of the coal conversion wastewater by adopting a coagulation settling method, wherein the mass / volume ratio of the crystals AlCl3 to the wastewater is 0.3g / L to 0.5g / L, and the fluoride ion content of treated wastewater is lower than 6mg / L. The coal conversion wastewater is complicated in water mass, is subjected to pretreatment and biochemical treatment, then, is subjected to ultrafiltration and reverse-osmosis membrane treatment and is subjected to advanced wastewater treatment and recycling. If the fluorides in the coal conversion wastewater enter a reverse osmosis membrane system for circulating concentration and produce calcium fluoride scales, flux and service lives of reverse osmosis membranes are seriously affected. According to the method disclosed by the invention, for complicated coal conversion wastewater, the crystals AlCl3 are selected asa coagulant, the coal conversion wastewater prior to entering the membrane system and the high-concentration brine subjected to membrane treatment are subjected to fluorine removing treatment, thus, the wastewater can meet the requirements of reverse osmosis concentrating, and the calcium fluoride scales are not produced.

The invention relates to a baffled Fenton oxidation reactor and an organic wastewater treatment method. The baffled Fenton oxidation reactor comprises a chemical mixing area, a baffled reaction area ,and four pipeline connectors, the chemical mixing area and the baffled reaction area are sequentially arranged from the inside to the outside of concentric sleeves, wherein the bottom central area isprovided with a wastewater inlet, a series of compressed air connectors are arranged on the bottom of the reaction area, and a drain outlet and an exhaust outlet are arranged at a position far from the center. The organic wastewater treatment method comprises the following steps: after wastewater is filtered and pH is regulated, metering pumps quantitatively add FeSO4 solution and H2O2 solution in sequence into a water inlet pipeline by means of a jet device to get into the reactor, an aerator is switched on, the mixed wastewater gets into the chemical mixing area in a tangential feeding manner, and rapidly spirals upwards along the internal wall of the barrel under the action of an agitating pump, the disturbance and turbulence of the wastewater are further intensified by fin baffles, and thereby the uniform mixing of the wastewater and chemical is promoted; in the baffled reaction area, and the mixed wastewater passes through in the form of plug flow, carries out rapid Fenton reaction, and flows out of the reactor via a downflow weir.

The invention discloses an anti-scaling dosing device for a sodium hypochlorite generator, comprising a casing, the outer wall of the casing is covered with a heating mechanism, the casing is provided with a fouling filter screen; the top of the casing is provided with a liquid inlet The pipe is used to communicate with the chamber between the inner wall of the shell and the fouling filter, and a drain pipe is provided at the bottom of the shell to discharge the brine filtered by the fouling filter; the output end of the drain pipe is connected to the input end of the cooling mechanism connected, the output end of the cooling mechanism communicates with the sodium hypochlorite generator. The working principle of the present invention is as follows: the scaling impurities such as calcium and magnesium ions in the brine are changed from invisible to visible at a high temperature of 50-100°C, and scales are directly formed on the scaling filter to facilitate later cleaning. The salt water enters the cooling mechanism for cooling and then is introduced into the sodium hypochlorite generator for point decomposition reaction, which can effectively prevent scaling on the electrode surface of the electrolytic cell and ensure the electrolysis efficiency.

The invention relates to a pipe impulse flow generator, belonging to the heat-matter transmission high-efficiency energy-saving device of natural gas and oil. The invention can reduce the resistance of transmitting liquid, save energy, decrease the deposition of olefin, and improve the heat efficiency of transmitting heat and matter. The invention comprises a upper nozzle, a self-excite chamber, a lower nozzle, and a pipe which are sequentially sealed, fixed and connected; the inlet of upper nozzle and the outlet of pipe are individually connected to the inlet and outlet pipe. The invention can use said generator to transform the continuous liquid via the self-excite chamber into impulse liquid without any auxiliary device, and improved amplitude of output pressure as 15-30%, increased impulse frequency from tens to hundreds, to reduce the resistance, save energy consumption and apply variable industries.

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 discloses a flat groove heat exchange tube and a heat exchanger using the heat exchange tube. The heat exchanger is applied to an automobile engine waste gas recycling system as an engine waste gas recycling cooler and comprises a section-shaped stainless steel tube body with unequal height and width. The upper surfaces and lower surfaces of the tube body are provided with internally concave short grooves which are parallelly arranged and the upper surfaces and lower surfaces among a plurality of grooves are provided with bulges protruding externally. By the combination of the grooves and the bulges of the flat groove heat exchange tube, the heat exchange tube does not easily deform and generates stable heat exchange effect when bearing fierce temperature and pressure change. The short grooves for increasing the heat exchange efficiency can increase the strength of a plane in the long axis direction of the flat tube, inhibit deformation, and the mutual support of the bulges among the tubes forcefully improves the stress condition on the tube wall; thus leading to the minimum deformation of the flat tube, sparing an enough space among the tubes in spite of deformationand being beneficial to the flow of a medium outside the tubes.

The invention discloses a micro and nano-grade light calcium carbonate tube-condensation-type double-circulation multi-level carbonation system. The system comprises at least three carbonization towers (1) connected in series. A slurry tank is provided between each two adjacent carbonization towers (1). A carbonization tower (1) comprises a high-pressure pump (3), a spraying mist-making device (4), a tower body (5), condensing tubes (6), an air compressor (7), a gas plate (8), a refrigerator (9), and an accumulated liquid and scale removing device (10). The condensing tubes (6) are connected with the refrigerator (9). The spraying mist-making device (4) is connected with the high-pressure pump (3). The gas plate (8) is connected with the air compressor (7). The accumulated liquid and scale removing device (10) is sleeved on the outside of the condensing tubes (6). The system provided by the invention has the advantages that: spraying and a high-liquid-level bubbling carbonization method are adopted, continuity is high, and carbonization efficiency is high. The condensing tubes are added, such that the reaction temperature in the tower can be conveniently controlled. The accumulated liquid and scale removing device is provided, such that condensing tube scale can be conveniently removed.

The invention discloses an all-glass tube MVC low-solubility sewage evaporation and condensation purification system, comprising: an evaporation condenser, a compressor, a water pump, a glass special-shaped preheater and a raw water tank. The present invention can optimize the existing mechanical vapor compression technology, and provide an evaporation condensation purification system with low cost, corrosion resistance, high efficiency and energy saving, daily output of about 0.5-10 tons of pure water, and zero discharge.