35results about How to "Good heat transfer coefficient" patented technology

A process and equipment for steam reforming of a hydrocarbon source gas, where the hydrocarbon source gas and a steam flow are partially reformed while passing in a bundle of tubes (13) of a reformer (10), with a catalytically active inner surface; a partially reformed product gas (18) leaving said tubes is mixed with an oxidation agent (19) and subject to a combustion process; a combusted partially reformed gas (20) is introduced in the shell side of said reformer and further reformed by contact with the outer surface of said tubes (13), said outer surface of the tubes being also catalytically active.

The invention provides an aluminum-silicon drainage agent and a preparation method thereof, belonging to the field of unshaped surface refractory materials used in the steelmaking industry. The technical solution of the present invention is: an aluminum-silicon drainage agent, which is composed of ceramic bead sand with a particle size of 0.5-1.2 mm, desert quartz sand with a particle size of 0.3-0.9 mm, phosphorus flake graphite with a particle size of ≤75 μm, and an adhesive It is made by first drying ceramic bead sand and desert quartz sand, then adding phosphorus flake graphite and binder, and stirring in a cylinder mixer to make it. The aluminum-silicon drainage agent of the present invention can effectively increase the casting rate of the product, so that the casting rate of the product can reach more than 98%, and at the same time greatly reduce the cost of the product, effectively reduce the emission of waste gas and dust, clean and environmentally friendly, and adapt to the current steel industry's requirements for product quality, Price and purity requirements of molten steel.

The invention relates to an anti-scaling and de-scaling heat exchanger for a fluidized bed. The anti-scaling and de-scaling heat exchanger is aimed at solving the technical problem in the prior art. Therefore, tube passes of a decarburized lye cooler of a synthetic ammonia device are not easily scaled. After long-term use, the heat exchange effect is still good. The anti-scaling and de-scaling heat exchanger is composed of a lower tube box 1, a heat exchanger tube array 2, an upper tube box 3, a liquid-solid separator 4, a descending tube 5, a solid particle groove 6, a liquid storage tank 7, a liquid circulating pump 8, a distribution box 9, a spherical plug 10, a baffle plate 11, a distribution disc 12, a distribution plate 13, slim tubes 14 and a lower-edge sleeve tube 15. An outlet of the distribution box 9 is connected with the slim tubes 14. The heat exchanger tube array 2 is connected with the upper tube box 3 connected with the liquid-solid separator 4. Solid phase enters the solid particle groove 6 through the descending tube 5. Liquid phase enters the liquid storage tank 7. The solid phase and liquid phase circulate to return the lower tube box 1. The anti-scaling and de-scaling heat exchanger for the fluidized bed has following beneficial effects: by adoption of the technical scheme, the above technical problem is solved; and the anti-scaling and de-scaling heat exchanger can be used for prolonging running cycle of the decarburized lye cooler of the synthetic ammonia device.

The invention relates to an outer circulating fluidized bed heat exchanger. The outer circulating fluidized bed heat exchanger is mainly used for solving the technical problem that the tube pass of a reformed hydrogenation unit reaction effluent / mixed feeding heat exchanger is easy to scale in the prior art, and thus the heat exchange effect can be lowered obviously after long-period use. The outer circulating fluidized bed heat exchanger comprises a lower tube box 1, heat exchanger tube nests 2, an upper tube box 3, a solid-liquid separator 4, a down pipe 5, a solid particle groove 6, a liquid storage tank 7, a liquid circulating pump 8, lower edge sleeves 9, a distribution plate 10, a baffle 11 and a horn pipe. The heat exchanger tube nests 2 are connected with the upper tube box 3, and the upper tube box 3 is connected with the solid-liquid separator 4. Solid particles enter the solid particle groove 6 through the down pipe 5 and then return to the lower tube box 1. Liquid enters the liquid storage tank 7 and then is pumped to the lower tube box 1 through the liquid circulating pump 8. By the adoption of the technical scheme, the technical problem is well solved, and the outer circulating fluidized bed heat exchanger can be used for prolonging the operation cycle of the reformed hydrogenation unit reaction effluent / mixed feeding heat exchanger.

The invention discloses a heat exchanger with net type lung-shaped heat exchange plates. The heat exchanger with the net type lung-shaped heat exchange plates comprises net type heat exchanger plates, a heat exchanger shell, a liquid inlet tube and a liquid outlet tube, wherein the net type heat exchanger plates are distributed in the heat exchanger shell from top to bottom at equal intervals to form a lung-shaped hollow structure; the liquid inlet tube and the liquid outlet tube are respectively arranged on the heat exchanger shell in the longitudinal direction; and according to each net type heat exchanger plate, two plate bodies with through holes are superposed vertically, the peripheries of the plate bodies and side seams of the through holes are welded together in an argon arc welding or laser welding mode, and a fluid channel in each plate is formed. By the heat exchanger with the net type lung-shaped heat exchange plates, fluid flowing resistance of the outside of each plate is reduced, meanwhile, large Reynolds number can be obtained at low speed, turbulent flow is formed, heat exchange coefficient is increased effectively, therefore, the heat exchanger is simple, efficient and energy-saving, and is compact in structure, occupied space and initial investment are saved, the resistance of the product is lower than that of a traditional plate type heat exchanger, and the heat exchange coefficient can be high.

The invention discloses a novel energy-saving autoclaved fly ash hollow wall material, which belongs to the field of building wall materials. It is prepared from the following raw materials in parts by weight: 55-75 parts of dry fly ash, 10-20 parts of carbide slag, 1-2 parts of gypsum, 5-25 parts of aggregate, and 0.5-1 part of sodium metasilicate. It is a cuboid, with blind holes distributed on the front of the cuboid, which communicate with the bottom surface; two of the sides have masonry positioning mortises, and the middle parts of the two sides are groove-type grip holes, and the ribs are set in the groove-type grip. In the middle of the hole, divide the grip hole into upper and lower two. The hollow wall material of the present invention has high compressive strength, large porosity (above 45%), small drying shrinkage, light density, small size deviation, high construction efficiency, excellent thermal insulation and other properties, and can greatly reduce The energy consumption of buildings is much better than traditional wall materials.

The invention relates to an acrylic heat insulation coating with high reflectivity and a preparation method of the acrylic heat insulating coating. The acrylic heat insulation coating with high reflectivity is prepared from 20wt%-55wt% of acrylic resin, 10wt%-33wt% of titanium dioxide, 6wt%-12wt% of modified aluminum powder, 3.2wt%-7.6wt% of heat insulation functional filler, 9wt%-17wt% of a mixedsolvent and the balance of aids, wherein the modified aluminum powder is flaky aluminum powder with the surface coated with titanium dioxide. Acrylic resin is used as a film forming substance, the high-reflectivity flaky aluminum powder with surface coated with titanium dioxide, titanium dioxide and the heat insulation functional filler with good heat insulation performance and very low heat transfer coefficient are added, so that the heat reflecting coating has the characteristic of integration of solar ray reflection, infrared light wave radiation and heat conduction barrier and has very good heat insulation and cooling effects.

The invention discloses an air preheater for a boiler, relating to the technical field of manufacturing of a heat exchanger. The air preheater for the boiler comprises a heat exchanger casing which is provided with a smoke inlet and a smoke outlet; a heater exchange pipe box is arranged in the heat exchanger casing and provided with an upper heat exchange pipe box with an air outlet, and a lower heat exchange pipe box with an air outlet, and an air channel is connected between the upper heat exchange pipe box and the lower heat exchange pipe box; each of the upper heat exchange pipe box and the lower heat exchange pipe box is provided with a plurality of heat exchange pipes which are inserted between two mounting plates, the outer surface of each heat exchange pipe is provided with fins, and a turbulator component is inserted in each heat exchange pipe; and an acoustic wave soot blower is arranged between the upper heat exchange pipe box and the lower heat exchange pipe box. Compared with the prior art, the air preheater has the advantages that the total heat exchange coefficient of the air prehater is improved by 2-4 times.

The invention provides a powdery coke desorption device. The powdery coke desorption device comprises an unloading cabin (1), an inlet material screw feeder (3), a rotary desorption tower (9), a rotary motor (7), and an outlet material screw unloading machine (14). The unloading cabin (1) is connected to a material inlet (2) of the inlet material screw feeder (3) by a feeding pipe. The rotary desorption tower (9) comprises a heat exchange tube (8) combined with the tower body. The inlet material screw feeder (3) installed on an upper part of the rotary desorption tower (9), the outlet material screw unloading machine (14) installed on a lower part of the rotary desorption tower (9), and the rotary desorption tower (9) are arranged in a housing filled with nitrogen. Joints of the rotary desorption tower (9), and the inlet material screw feeder (3) and the outlet material screw unloading machine (14) are sealed by high temperature-resistant seal rings (6, 12). The rotary motor (7) is connected to the exterior of the tower body of the rotary desorption tower (9).

The invention relates to a no-scaling fluidized bed heat exchanger. The no-scaling fluidized bed heat exchanger is mainly used for solving the technical problems that in the traditional technology, a methyl tertiary butyl ether device refining tower condenser tube pass is liable to scale, and the heat exchange effect is lowered significantly after a long period of usage. According to the adopted technical scheme of the no-scaling fluidized bed heat exchanger, a lower pipe box 1, a heat exchanger tube 2, an upper pipe box 3, a liquid-solid separator 4, a downtake 5, a solid particle trough 6, a liquid storage trough 7, a liquid circulation pump 8, a distribution box 9, a ball plug 10, a baffle 11 and a distribution plate 12 are included; the distribution box 9 is connected with the heat exchanger tube 2 through a thin tube 13; the heat exchanger tube 2 is connected with the upper pipe box 3; the upper pipe box 3 is connected with the liquid-solid separator 4; solid particles enter the solid particle trough 6 through the downtake 5 and then return to the lower pipe box 1; liquid enters the liquid storage trough 7 and is conveyed to the lower pipe box 1 through the liquid circulation pump 8, through the technical scheme, the technical problems are solved well, and the no-scaling fluidized bed heat exchanger can be used for prolonging the operation cycle of a methyl tertiary butyl ether device refining tower condenser.

The invention discloses a continuous crystallization process for monopotassium phosphate. The continuous crystallization process comprises the following specific steps of: introducing a feed liquid to be crystallized into a first-stage continuous flash crystallizer so as to be separated into a primary clear liquid, primary crystal mush and secondary steam; discharging the primary crystal mush from the first-stage continuous flash crystallizer and feeding the primary crystal mush into a second-stage continuous cooling crystallizer, wherein the second-stage continuous cooling crystallizer is composed of an Oslo crystallizer and an external cooler; separating the primary crystal mush into secondary crystal mush and a secondary clear liquid in the Oslo crystallizer; discharging the secondary crystal mush from the Oslo crystallizer, feeding the secondary crystal mush into a thickener and separating the secondary crystal mush into triple clear liquid and triple crystal mush; discharging the triple crystal mush from the thickener, feeding the triple crystal mush into a centrifugal machine, and separating the triple crystal mush into solid monopotassium phosphate and a centrifugal liquid; and discharging the solid monopotassium phosphate from the centrifugal machine. The continuous crystallization process is stable in operation, low in energy consumption and low in labor intensity; and by using the continuous crystallization process, the operation stability and the product quality are greatly improved, the on-site operation environment is improved, and the production cost of the monopotassium phosphate is reduced. A mating device for the process is small in floor area and high in capacity.

The invention relates to a self-cleaning fluidized bed heat exchanger which is mainly used for solving the technical problems that in the prior art, the tube pass of a decarburization alkaline liquorcooler of an ammonia synthesizing device is prone to scaling, and the heat exchange effect is obviously decreased after long-period use. The self-cleaning fluidized bed heat exchanger comprises a lower tube box 1, a heat exchanger tube nest 2, an upper tube box 3, a liquid-solid separator 4, a particle filtering plate 5, a liquid storing tank 6, a liquid circulating pump 7, a downcomer 8, a spraynozzle 9, a horizontal pipe 10 and an expanding port 11, wherein the expanding port 11 is installed in the lower tube box 1, the upper tube box 3 is connected with the liquid-solid separator 4, solidparticles enter the spray nozzle 9 through the downcomer 8, and a liquid phase overflows from the upper portion of the particle filtering plate 5, enters the liquid storing tank 6 and circulates to the spray nozzle 9 through the liquid circulating pump 7. According to the technical scheme, the technical problems are well solved, and the self-cleaning fluidized bed heat exchanger can be used for prolonging the running cycle of the decarburization alkaline liquor cooler of the ammonia synthesizing device.