59results about How to "Reduce the chance of fouling" patented technology

The invention provides a mechanical ventilation forced circulation evaporation device and a liquid material evaporation method which are used for improving the operation reliability of an evaporation system and reducing the energy consumption and the operation cost. The mechanical ventilation forced circulation evaporation device comprises an evaporation container (10), a liquid material circulation system, a hot air conveying system and a tail gas collecting discharging system, wherein the evaporation container (10) is sealed, and a discharging pipe (11) is arranged at the bottom of the evaporation container (10); the initialing end and the terminal end of the liquid material circulation system are respectively positioned below and above a liquid level (A) inside the evaporation container (10); the terminal end of the air conveying system is communicated with a cavity of the evaporation container (10); and the initialing end of the tail gas collecting discharging system is communicated with a cavity above the liquid level (A) in the evaporation container (10).

The invention relates to an anti-scaling multiple shell pass assembled heat exchanger. The anti-scaling multiple shell pas assembled heat exchanger comprises a base, a bracket and a plurality of heat exchange units, wherein the base is fixed on the ground, the bracket is mounted at the upper end of the base, the plurality of the heat exchange units are mounted on the bracket, each of the heat exchange units is an independent single tube pass and single shell pass shell-and-tube heat exchanger and the heat exchange units are connected in pairs; each of the heat exchange units comprises a housing, tube boxes, tube plates, a tube bundle, a spiral baffle plate, a tube pass inlet, a shell pass inlet, a tube pass outlet and a shell pass outlet; the tube boxes are arranged at two ends of the housing, the tube bundle and the spiral baffle plate are arranged in the housing, the tube bundle is composed of a plurality of heat transfer tubes, the tube plates are welded at two ends of the tube bundle, and the spiral baffle plate is continuously welded by fan-shaped surface plates to form a spiral surface structure and is mounted on the tube bundle. By lengthening the lengths of the tube passes of the heat exchangers, the sections of the tube passes are reduced and the fluid flow rate of the tube passes is improved, so that the scaling probability of the tube passes is greatly reduced.

The invention discloses a dedusting and desulfurization integrated machine. The machine comprises an inlet flue, a filter chamber, a dust chamber, a desulfurizing tower, an outlet flue and a circulating pool, wherein the inlet flue is communicated with the filter chamber; the filter chamber is communicated with the dust chamber through a first flue gas passage; the dust chamber is communicated with the desulfurizing tower through a second flue gas passage; a uniformly distributing board is arranged in the second flue gas passage; the outlet flue is formed in the top of the desulfurizing tower; a circulating hole is formed in the bottom of the desulfurizing tower and communicated with the circulating pool through a circulating pipeline; the circulating pool is connected with a circulating pump; and the circulating pump is connected with the desulfurizing tower through a liquid inlet pipe. The machine disclosed by the invention has the advantages that the dedusting and the desulfurization can be integrally completed; the dedusting effect is good; a bag dedusting method is not adopted, so that the operating cost is saved; the flue gas is stable and uniform; the desulphurization efficiency is high; scale cannot be easily formed in the desulfurizing tower and the pipeline; the machine is simple and convenient to operate; and the system can be stably operated in a long term.

The invention provides an article transfer device which can transfer a plurality of articles at each batch without dispersing the articles and reduces the possibility of contaminating and polluting the articles as well as the costs of maintenance and operation. An elevator (15) is utilized to transport loading trays on the first delivering machine (11A) and a second delivering machine (12B) and the second delivering machine (11B) to the pickup device right below a shifting device (13); a pair of scooping-up-and-guiding parts (13G) are inserted into the two sides of the rod-shaped article (A) in order to scoop up the article (A); the empty-loaded trays (14) and the second delivering machine (11B) are descended to the transportation position through the elevator (15); the product discharging delivering machine (15) is extended to the reception position below the shifting position (13) from the avoiding position so as to enable the scoop-up-guiding part (13G) to perform backward driving relative to the scooping up action, and the scooped up product is discharged to the product discharging delivering machine (12). The product discharging delivering machine (12) is driven to discharge the product along the Y axis.

The invention discloses a process used for refining crude titanium tetrachloride and capable of prolonging the production cycle. The process comprises the following steps: crude titanium tetrachloride and a vanadium-removing reagent as an organic matter are fed into a mixed-material feed system, then the obtained mixed materials is fed into a reactor and heated in the reactor by a heat source provided by a heating coil so as to complete the vanadium-removing process in the reactor; pure titanium tetrachloride steam is fed into a condenser, and after the pure titanium tetrachloride steam exchanges heat with circulating cooling water, the obtained steam enters a reflux accumulator, then part of the obtained steam as refluxed liquid is returned to a packed tower and then transported back to a reaction system, and the other part of the obtained steam is fed into an intermediate tank to detect, after passing the detection, this part of the obtained steam is fed into a finished-product storage tank, wherein in the process of refluxing, the reflux ratio is controlled at one second to one third; mud samples are taken out from the reactor every 6 to 8 hours so as to keep the solid-liquid ratio in the range of 30 to 60 percent; and the mud discharged from the reactor is transported to a molten salt chlorination system every 6 to 8 hours so as to recycle the titanium tetrachloride in themud. The process provided by the invention has the advantages that a production system can continuously and stably operate more than 24 months, thereby improving the production efficiency; and the titanium tetrachloride in the mud discharged from the reactor can be recycled, thereby reducing the production cost and reducing the environmental pollution.

The invention relates to an industrial wastewater treatment technique and device, particularly a thermal power plant desulfurization wastewater electrodialysis reconcentrator. An inlet of a precipitation tank communicates with an outlet of an oxidation tank and an inlet of a multimedia filter; an outlet of the multimedia filter communicates with an inlet of a regulating tank; a first outlet of the regulating tank communicates with an inlet of the oxidation tank; a second outlet of the regulating tank communicates with an inlet of an electrodialysis plant; a cathode water outlet of the electrodialysis plant communicates with the inlet of the precipitation tank; an anode water outlet of the electrodialysis plant communicates with the inlet of the oxidation tank; an electrodialysis concentrated water outlet of the electrodialysis plant communicates with an inlet of an evaporative crystallizer; an electrodialysis fresh water outlet of the electrodialysis plant communicates with an inlet of an reverse osmosis unit; an outlet of a first dosing tank communicates with the inlet of the oxidation tank; and an outlet of a second dosing tank communicates with the inlet of the precipitation tank. The thermal power plant desulfurization wastewater electrodialysis reconcentrator has high electrodialysis weight concentration, reduces the subsequent evaporative crystallization load, and lowers the investment and operating cost.

The invention provides a resourceful treatment system and method for efficient reuse of salt-containing mine water. According to the invention, the salt-containing mine water enters a hollow fiber nanofiltration membrane device, soluble salts such as MgSO4, Na2SO4, MgCl2 and NaCl are intercepted under the pressure of 0.1 MPa-5MPa, produced water can be directly reused, concentrated water is softened and then subjected to hardness removal through reverse osmosis concentration coupled with chemical induced crystallization, and reflux circulation is performed until the osmotic pressure of a reverse osmosis concentration device is reached; then obtained concentrated water is subjected to nanofiltration salt separation and further concentration; and then obtained concentrated water enters a bipolar membrane ion exchange device to obtain recyclable acid liquor and alkali liquor, or the concentrated water is subjected to concentration and evaporative crystallization to obtain crystallized salt. In order to improve the reuse rate of mine water resources, salt ions in the mine water are partially removed under low pressure by adopting a hollow fiber nanofiltration membrane technology, and meanwhile, the water production rate of first-stage RO is improved to 90% or above by using RO coupled with chemical induced crystallization; and concentrated strong brine can be treated by using a bipolar ion exchange membrane technology, and an acid-base solution which can be recycled for a water treatment system is obtained at the same time, so real zero discharge of wastewater is realized.

The invention discloses a water purification process, which purifies water through purification devices. Each purification device comprises a water inlet, a purification membrane group for water purification, a water producing port for discharging purified water, and a water outlet for discharging concentrated water. According to the process, a plurality of the purification devices are distributed and combined to form a front part purification device group and a back part purification device group, and the front part purification device group and the back part purification device group compose a purification system. Through different collocation and combination of the purification devices in the front part purification device group and the purification devices in the back part purification device group, the purification system has multiple operation states, and according to needs, the purification devices in the back part purification device group and the purification devices in the front part purification device group can be interchanged in terms of the connection position. With the process, the pollution and plugging probability of the purification membrane group is lowered, the chemical cleaning expense caused by pollution and plugging of the purification membrane group is reduced, and the service life of the purification membrane group is prolonged.

The invention relates to the technical field of seawater desalination, and especially relates to a recondensation apparatus of concentrated seawater. The recondensation apparatus of concentrated seawater comprises a low temperature multiple-effect distillation seawater desalination system, an isolating valve, a seawater booster pump, a conductivity instrument and a flowmeter. The inlet of the isolating valve is connected to a concentrated seawater pump of the low temperature multiple-effect distillation seawater desalination system, the outlet of the isolating valve is connected to the inlet of the concentrated seawater pump through a pipeline; the outlet of the concentrated seawater pump is connected to a spray apparatus of the low temperature multiple-effect distillation seawater desalination through the pipeline; and the conductivity instrument and the flowmeter are respectively connected on the pipeline between the isolating valve and the concentrated seawater pump. The recondensation apparatus of concentrated seawater conveniently makes the concentration of seawater to reach a requirement of a salt chemical enterprise.

The invention discloses an anti-scaling type trace exhaust valve. The anti-scaling type trace exhaust valve comprises a valve body, wherein the valve body is internally provided with a lever assembly, the lever assembly is connected with a floating ball, and the valve body is also internally provided with a magnetic material of which the magnetic field range acts on the surface of the lever assembly. According to the anti-scaling type trace exhaust valve disclosed by the invention, the magnetic material is arranged in the anti-scaling type trace exhaust valve, a magnetic field of the magnetic material covers the surface of the lever assembly, thus the polarity is changed when ions pass through the surface of the lever assembly, the nucleation rate is increased, a large number of micro-crystals can be generated, the stability of the micro-crystals is better, the generation of macro-crystals is restrained, the scaling probability on the surface of the lever assembly is greatly reduced, the normal work of the lever assembly is ensured, the phenomena of clamping and blocking cannot happen, the structure is simple, the consumption of electric energy is not needed, and the practical performance is better.

The invention belongs to the field of chemistry and chemical engineering, and relates to a method for removing impurities in recycled acetic acid and application thereof. The method for changing the distribution of the polymer in the mixed system comprises the following steps: adding concentrated sulfuric acid into the mixed system for hydrolysis and / or degradation; and adding magnesium acetate or sodium acetate for reaction, then carrying out extraction reaction, and collecting an organic phase to finally obtain pure acetic acid. The method disclosed by the invention is suitable for recycling acetic acid in a mixed system related to cellulose acetate production and removing intermediate products and wastes. The method is simple and easy to operate, no expensive equipment is added, the impurity removal effect is good, the energy consumption and material consumption of the acetic acid recovery process are remarkably reduced, the overhaul frequency of a heat exchanger is reduced, the productivity is improved, and the economic benefit is obvious.

The invention relates to a heater for heating network. The heater for heating network comprises a shell and a front end pipe box and a rear end pipe box; the front end pipe box and the rear end pipe box are arranged at the two ends of the shell; pipe bundles are arranged in the shell; a partition plate is arranged in the front end pipe box along the axis of the shell and the front end pipe box isdivided into an upper water inlet cavity and a lower water outlet cavity; the upper end of the water inlet cavity communicates with a water inlet pipe connecting pipe; the lower end of the water outlet cavity communicates with a water outlet pipe connecting pipe; the upper end of the shell is provided a steam inlet connecting pipe; the lower end of the shell is provided with a drain outlet connecting pipe; a filter screen is arranged in the water inlet pipe connecting pipe; the filter screen is cylindrical with an opening arranging at the upper end; the upper end of the filter screen is rotationally connected in the water inlet pipe connecting pipe and the lower end of the filter screen extends into the water inlet cavity; and a driving part for driving the filter screen to rotate is arranged in the water inlet pipe connecting pipe. The heater for heating network has the effects that the water medium is filtered, impurities are reduced from entering the pipe bundles, the probability ofblockage and scaling of the pipe bundles is reduced so that the cleaning times are further reduced, the utilization efficiency of the heater is guaranteed to the greatest extent, and the production efficiency is improved.

The invention provides a low-pressure steam generator. The steam generator comprises a housing provided with openings at the upper and lower ends, a shell side inlet, a shell side outlet, an upper tube plate arranged at the opening at the upper end of the housing, and a lower tube plate arranged at the opening at the lower end of the housing. An upper head is arranged above the upper tube plate, and a lower head is arranged below the lower tube plate. A heat exchange tube set is arranged between the upper and lower tube plates and is vertically disposed inside the chamber of the housing. The steam generator also comprises a tube side inlet and a tube side outlet. A tube plate thermal insulation layer is arranged on the upper surface of the upper tube plate. The inner tube wall at the upper end of each heat exchange tube is provided with a heat exchange tube thermal insulation layer, the heat exchange tube thermal insulation layer is internally provided with a sleeving, and the upper end of the sleeving protrudes from the heat exchange tube and is disposed inside a through hole in the tube plate thermal insulation layer in a penetrating manner. The steam generator is provided with the tube plate thermal insulation layer and the heat exchange tube thermal insulation layers, so that the tube plates and heat exchange tube materials can be effectively prevented from being thermally eroded by tube side high-temperature mediums, the temperature of the tube plates and the heat exchange tubes is reduced, and the temperature of the tube plates and the heat exchange tubes can be controlled within the using temperature range of the used materials.