44results about How to "Avoid wall flow" patented technology

The invention relates to a stable gas membrane used for removing, recovering, and gathering ammonia or organic amine from dosage liquor or wastewater. The gas membrane comprises a membrane shell, hollow fibrous membranes (A) and hollow fibrous membranes (B). A cavity is provided in the middle of the membrane shell. An inlet and an outlet are respectively arranged on each of the two ends of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are positioned in the cavity of the membrane shell. A shell pass outlet communicating with the atmosphere is arranged on a lower end of the membrane shell. The hollow fibrous membranes (A) and the hollow fibrous membranes (B) are uniformly arranged in the membrane shell with regular spaces. Dosage liquor or wastewater containing ammonia or organic amine is delivered through the tube pass of the hollow fibrous membranes (A), and absorption liquid is delivered through the tube pass of the hollow fibrous membranes(B). With the gas membrane provided by the invention, problems of traditional gas membranes of leakage and low service life are overcome; dilution of a byproduct ammonium salt solution caused by a concomitant osmotic distillation phenomenon can be effectively inhibited; ammonium salt concentration of the byproduct ammonium salt solution can be increased from 10-20% to 20-40%; mass transfer coefficient at the acid absorption liquid side can be substantially improved; the ammonia removing efficiency is high; the ammonia removing effect is stable for a long-term; and the service life of membranesets can be improved by 3-10 times than common gas membranes.

The present invention relates to a BTF used for dealing with the volatile waste gas, belonging to the field of treatment of the volatile waste gas, which aims at solving the problems that the prior BTF has uneven air flow distribution and biomass distribution, high center gas speed and voltage drop, and the prior BTF is easy to be blocked. The technic proposal is that: the volatile waste gas passes through an intake pipe (1) and then comes into a biofilter (22), and then being drained away by an exhaust pipe (9) after having the processes of degradation and purification; a nutrient solution (11) comes into the biofilter (22) through a nutrient solution shower (18) and a dropwise adding distributor device (19) having fixed quantities at fixed time; the present invention is characterized in that adopting a light and cheap packing (4) with different grain diameters, the biofilter (22) takes a homocentric column shape sleeve structure , the grain diameters of the filled packing (4) from the center to the edge are distributed from small to big, the centre area is filled with the packing (4) with small grain diameters, the ring area of the around close walls is filled with the packing (4) of big grain diameters. The present invention makes the distribution of the biomass in the biofilter even, thereby fully utilizing the useful space of the biofilter.

The invention relates to the field of hydrogenation for preparing cyclohexane-1,2-dibasic diformate, and discloses a preparing method for cyclohexane-1,2-dioctyl phthalate dibasic ester. The method comprises the steps that firstly, hydrogenation raw materials containing phthalic acid dibasic ester and H2 are subjected to first contact in a main hydrogenation reactor in the presence of a first catalyst, and first gas-liquid mixing fluid is obtained; secondly, the first gas-liquid mixing fluid is subjected to gas-liquid separation; thirdly, hydrogen is injected into main hydrogenation reaction liquid through holes with the average hole diameter being the nanometer size, the main hydrogenation reaction liquid is separated out in the second step, and second gas-liquid mixed fluid is obtained; fourthly, the second gas-liquid mixed fluid is subjected to second contact in a rear hydrogenation reactor in the presence of a second catalyst, and third gas-liquid mixed fluid is obtained; and fifthly, the third gas-liquid mixed fluid is subjected to gas-liquid separation. The method has the beneficial effects that the raw material conversion rate, the product selectivity and the cis-structure product content are high.

The invention belongs to the technical field of chemical industry and relates to a device and a method for preparing acetoxime. The acetoxime is prepared from acetone, tertiary butanol, water, ammonia water and hydrogen peroxide by using an integrated TS-1 molecular sieve as a catalyst (an integrated titanium silicalite molecular sieve serves as a catalyst) and through liquid solid phase acetone ammoxidation. The device comprises a condenser, an integrated reactor and an external circulation pump. The integrated TS-1 catalyst (the integrated titanium silicalite molecular sieve serves as the catalyst) synthesized by using frustum-shaped cordierite as a carrier is loaded in the integrated reactor and is applied to preparation of the acetoxime. By adoption of the frustum-shaped cordierite carrier in the device, the wall flow phenomenon can be effectively avoided, so that activity of the catalyst and catalytic efficiency of the reactor are greatly improved. By the device and the method, the problem that the traditional powdered catalyst is difficult to recycle is solved. The device and the method have a wide market application prospect.

The invention provides a car-washing wastewater treatment method and equipment which are applied to small-sized car-washing stations. The car-washing wastewater treatment method comprises the following steps of: clarifying in a coagulating sedimentation tank with sloping plates by using a coagulant; carrying out turbidity removal and oil absorption by using fiber bundle media; carrying out air-water backwashing after the fiber bundle media become invalid; carrying out oil removal treatment on oil stain accumulated in the fiber bundle media by adding a cleaning agent at a certain water temperature; for residual organic matters of the fiber bundle media, firstly soaking the fiber bundle media by using an agent, and then cleaning; and adsorbing the organic matters and a surface active agent by using diatomite and activated carbon. The equipment adopting the method comprises the coagulating sedimentation tank designed by modular combination, a fiber filtration tank and an adsorption tank; and matched wastewater collection tanks and clear water tanks can be buried in the ground. The equipment is small in volume, low in manufacturing cost and operation cost, simple to operate and convenient to maintain and has a good effluent effect. The quality of water treated by the method and equipment can reach Water Quality Standard for Domestic Miscellaneous Water (CJ/T48-1999). The method and equipment have wide application prospect.

The invention discloses a wastewater ammonia nitrogen blow-off treatment reaction device which comprises a shell, wherein a gas water separation layer, a water distribution device, an umbrella-shaped water shield and a gas distribution device are distributed in the shell at intervals from top to bottom in sequence; the shell is divided into an upper chamber and a lower chamber by the umbrella-shaped water shield; a drain pipe is arranged on the shell at the bottom of the upper chamber; the water distribution device consists of a water inlet pipe, a gas inlet pipe and a double-fluid spray nozzle, wherein the water inlet pipe and the gas inlet pipe are communicated; and the communication part of the water inlet pipe and the gas inlet pipe is provided with the downward double-fluid spray nozzle to form a three-way structure, so that gas-liquid waste caused by mixing gas and liquid by utilizing a packing layer can be effectively avoided, channeling and wall flow phenomena can be effectively prevented, and the stability of ammonia nitrogen blow-off treatment is improved.

The invention relates to a device capable of completely eliminating a wall flow effect and integrated with a tower body and a method for mounting the device. The device is composed of a liquid collecting circle 1 and a liquid redistribution circle 2, wherein the upper end of the liquid collecting circle is welded to the inner wall of the tower below a packing layer, while the lower end thereof is cut out; the liquid redistribution circle is a barrel with a circular ring at the bottom; the liquid redistribution circle is inserted between the tower wall 3 and the liquid collecting circle; the upper end of the liquid redistribution circle is higher than the lower end of the cut-out position of the liquid collecting circle; and the bottom circular ring of the liquid redistribution circle is arranged on the packing layer. No gap is reserved between the upper part of the liquid collecting circle of the device and the tower body, so that the phenomenon that liquid flowing along the wall is collected incompletely can be avoided; therefore, secondary wall flow is prevented.

The invention discloses a gas-liquid distribution device, which comprises an umbrella cap, an overflow pipe and a distribution disc which are arranged from top to bottom; the umbrella cap is conical and umbrella-shaped and is arranged at the upper end of the overflow pipe; the overflow pipe is a circular pipe with two open ends; the lower end is fixed on a mounting hole of the distribution plate;a gas-phase channel is arranged at the joint of the overflow pipe and the umbrella cap, one or two or more layers of overflow holes are evenly formed in the pipe wall in the circumferential directionto serve as liquid-phase channels, a liquid collecting disc is arranged below each layer of overflow holes in the overflow pipe, the liquid collecting discs are concave flat-bottom discs and fixedly connected with the pipe wall of the overflow pipe through convex concave edges, and distribution holes are evenly distributed in the bottoms of the liquid collecting discs for gas-liquid two-phase passing. According to the invention, gas-liquid two-phase contact can be enhanced, the gas-liquid two-phase atomization effect is promoted, and the wall flow phenomenon in the overflow pipe is reduced.

The utility model discloses a spraying system which is arranged in a wet-method flue-gas desulfurization and absorption tower. The spraying system comprises a plurality of layers of spraying layers, wherein, main spraying pipes, branch spraying pipes and a nozzle are arranged in the spraying layers, at least two parallel main spraying pipes are arranged on each spraying layer and two ends of the main spraying pipe are supported on the tower wall of the absorption tower. For the absorption tower with large cross section, after at least two main spraying pipes are adopted, support beams of the branch spraying pipes can be saved so as to reduce the erosion to the support beam; by adopting the solid and tapered nozzle that is arranged near the periphery of the tower wall of the absorption tower, the wall-flow phenomenon and the spraying amount of the slurry can be reduced and the spraying effect of the slurry can be ensured to be more effective.

The invention relates to an acid gas absorption oxidization tower and a method for operating the same. The acid gas absorption oxidization tower comprises a tower, a surplus ammonia water spray device, a plurality of layers of fillers, a re-distributor and a catalyst layer. The surplus ammonia water spray device, the multiple layers of fillers, the re-distributor and the catalyst layer are sequentially arranged in the tower from top to bottom; a purified gas outlet is formed in the top of the tower, an acid gas inlet is formed in a side of the tower and is particularly formed in a position between the lowermost layer of fillers and the re-distributor, an ammonium sulfate solution storage tank is arranged at the bottom of the tower, an air inlet is formed in a side of the tower and is particularly formed in a position below the catalyst layer and above the ammonium sulfate solution storage tank, and an ammonium sulfate solution outlet is formed in a side of the bottom of the ammonium sulfate solution storage tank. The acid gas absorption oxidization tower and the method have the advantages that the acid gas absorption oxidization tower is simple in structure and convenient to operate and is used for absorbing and then oxidizing acid gas generated when desulfurization waste liquid is incinerated, and then preparing ammonium sulfate solution, accordingly, the traditional desulfurization waste liquid treatment technological processes can be simplified on the basis that the desulfurization waste liquid is treated, and the equipment investment can be saved.

The invention discloses a plastic bag raw material mixer. The plastic bag raw material mixer comprises a heat dissipation fan, a motor device, a barrel body and a thermometer, wherein the left side ofthe motor device is equipped with the heat dissipation fan; the right side of the motor device is fixedly connected with a drive shaft; the right side of the drive shaft is arranged inside the barrelbody; the upper side of the drive shaft is equipped with a first transmission shaft; a discharge hole is formed in the middle of the right side of the barrel body; the barrel body is fixedly arrangedon the bracket; the left lower side of the barrel body is equipped with a steam outlet; and an outlet regulating valve is arranged on the steam outlet. The plastic bag raw material mixer disclosed bythe invention adopts dual transmission shafts, and dispersing discs are uniformly arranged on the transmission shafts in a spaced mode, so that raw materials do not form fixed rotating vortex duringrotation, raw material mixing is more uniform, mixing time is shortened, working efficiency is improved, mixing work of plastic bag raw materials can be performed better, and development of the plastic bag processing industry is promoted.

The invention belongs to the field of wastewater processing, and particularly relates to a biological membrane biochemical reaction system based on ozone and a wastewater purifying process. The biological membrane biochemical reaction system comprises an ozone reactor for purifying wastewater through the ozone, an oxygen-rich aeration biological membrane biochemical reactor communicated with an ozone generator and used for deeply purifying and discharging the purified waste, and an ozone decomposition reactor communicated with the ozone generator, the oxygen-rich aeration biological membrane biochemical reactor and used for decomposing the ozone passing through the ozone reactor but not completely reacting into oxygen. The low-energy-consumption, high-efficiency and economical wastewater deep purifying process is provided, and the ozone catalytic oxidization is fixedly connected with the biological membrane biochemical reactor in series. The wastewater can be purified for up-to-standard discharging under the low energy consumption.

The invention belongs to the technical field of chemical engineering, and particularly relates to a novel magnesium nitrate method based concentrated nitric acid production system which comprises a nitric acid concentration tower and a bleaching tower. Dispersers positioned at the top of the nitric acid concentration tower and the top of the bleaching tower are groove-type dispersers, the sprinkling aperture of the disperser at the top of the nitric acid concentration tower is 6mm, and the sprinkling aperture of the disperser at the top of the bleaching tower is 4mm. The height specification of two tower sections of the nitric acid concentration tower is 15300mm. Compared with a traditional disperser of a disc type structure, the novel magnesium nitrate method based concentrated nitric acid production system has the advantages that the spraying density can be increased, column flow is prevented from being generated during spraying, the gas-liquid contact area is increased, mass transfer and heat transfer between gas and liquid are improved, and the nitrate content of dilute magnesium nitrate is reduced; and compared with the traditional tower section specification and the nitric acid concentration tower with the height of 14900mm, the system has the advantages that the rectification height of the concentrated nitric acid is increased to stabilize the concentration of the finished product acid to be more than 98.2% (w/w), meanwhile, the denitration height is increased, and the nitrate content in the dilute magnesium nitrate is reduced.

The present invention discloses a water head pressure control system and an apparatus for a pinhole seepage deformation test. The water head pressure control system comprises a water storage device and water supply pipes for supplying water for a seepage deformation device, wherein the water supply pipes comprise a water supply main pipe and at least a water supply branch pipe communicated with the water supply main pipe, one end of the water supply main pipe is communicated with the water storage device, the other end is communicated with each water supply branch pipe, the water supply main pipe is further provided with a water drain pipe, each water supply branch pipe end being not connected with the water supply main pipe is respectively communicated with the water inlet pipes in each seepage deformation device, the water supply main pipe is sequentially provided with a metering pump, a first accumulator, a speed regulating valve, a pressure reducing valve, a second accumulator and a pressure gauge, the water drain pipe is arranged between the first accumulator and the speed regulating valve and is provided with an overflow valve, and each water supply branch pipe is provided with a shut-off valve and a pressure gauge. According to the present invention, the structure of the apparatus is simple, the seepage deformation water pressure during the experiment process can be continuously, stably and accurately controlled, and the reliability of the experimental data can be improved.

The invention discloses a gas-liquid distribution device. The gas-liquid distribution device comprises a reactor wall, and a distribution plate, an overflow pipe and a distribution disc which are arranged along the reactor wall from top to bottom, wherein the distribution plate is a flat plate, is consistent with the section of a reactor in shape, is supported on the wall of the reactor and is provided with flow guide holes; the overflow pipe is a circular pipe with two open ends, the lower end of the overflow pipe is fixed on a mounting hole in the distribution disc, and overflow holes are uniformly formed in the pipe wall along the circumferential direction to serve as liquid phase channels; and the upper end of the overflow pipe is a free end, is positioned below the distribution plate, is over against the center of a non-perforated area between the flow guide holes in the distribution plate and is completely shielded by the non-perforated area. Compared with a common scheme of blocking overflow pipes one by one in the prior art, the distribution plate used in the invention has the advantages of small processing amount, short manufacturing period and low cost while the purpose of preventing an upper liquid phase from directly entering the overflow pipes can also be achieved. According to the invention, the contact time of a gas phase and a liquid phase is prolonged, dissolution of the gas phase in the liquid phase is promoted, and meanwhile, the phenomenon of inner wall flow of the overflow pipe is effectively avoided.

The invention discloses an industrial acidic waste gas treatment device for preventing white smoke from emitting from two fluids, and relates to the technical field of industrial acidic waste gas treatment. The industrial acidic waste gas treatment device comprises a gas collection device, a first washing tower, a second washing tower and a fan. The lower end of the gas collection device is connected with a condensed gas-liquid separator, and the right side of the upper end of the gas collection device is connected with a gas guide pipe. The first washing tower is connected to the other end of the gas guide pipe, an observation window is formed in the outer side of the front end of the first washing tower, and a first washing tower gas inlet and a first washing tower water inlet are sequentially formed in the left side of the first washing tower from top to bottom. Through the arrangement of two ball packing layers, the removal rate of waste gas can be effectively increased, meanwhile, the wall flow phenomenon can be effectively avoided, the gas-liquid collision probability is increased, the reaction time is prolonged, and therefore the actual filtering effect of the first washing tower is greatly improved. Meanwhile, the shape and structure of the second washing tower are consistent with those of the first washing tower, and the treatment quality is ensured while the acid waste gas treatment efficiency is ensured.

The invention discloses gas-liquid distribution equipment. The gas-liquid distribution equipment comprises a reactor wall as well as a distribution plate, an overflow pipe and a distribution disc which are arranged along the reactor wall from top to bottom, wherein the distribution plate is a corrugated plate, the shape of the distribution plate is consistent with the shape of a cross section of a reactor, the distribution plate is supported on the wall of the reactor, and flow guide holes are formed in the corrugated plate and are formed in crests or troughs of the corrugated plate; the overflow pipe is a circular pipe with two open ends, the lower end of the overflow pipe is fixed on a mounting hole of the distribution disc, and one or two or more layers of overflow holes are uniformly formed in the pipe wall along the circumferential direction to serve as liquid phase channels; and the upper end of the overflow pipe is a free end, is positioned below the distribution plate, faces non-perforated areas among the flow guide holes in the distribution plate and is completely shielded by the non-perforated areas. Compared with a common scheme of blocking overflow pipes one by one in the prior art, the distribution plate used in the invention has the advantages of small processing amount, short manufacturing period, low cost and excellent scaling resistance while the purpose of preventing an upper liquid phase from directly entering the overflow pipes can also be achieved; and meanwhile, the phenomenon of inner wall flow of the overflow pipe is effectively avoided.