53results about How to "Meet heat transfer requirements" patented technology

The invention provides a methanation fluidized bed reactor which is equipment for performing reaction on CO and H2 to generate methane and water and performing reaction on CO2 and H2 to generate methane and water at a certain constant low temperature. The methanation fluidized bed reactor comprises a cylindrical shell and inner parts, wherein a primary gas distributor and a secondary gas distributor are arranged at the bottom, and a catalyst is filled to form a catalyst bed; a heat exchange device consisting of a plurality of groups of heat exchange tubes is arranged in the catalyst bed; the lower ends of the heat exchange tubes in each group are communicated with a water inlet header pipe which is communicated with a water outlet of a steam drum, and the upper ends of the heat exchange tubes in each group are communicated with a steam outlet header pipe which is communicated with a steam inlet of the steam drum. According to the methanation fluidized bed reactor, heat continuously released during methanation reaction can be timely transferred through another medium, and the reaction can be performed at the constant low temperature.

The invention is applicable to the field of air cold medium pre-heating and particularly relates to a self-supporting wide gap heat exchanging element. The self-supporting wide gap heat exchanging element comprises a plurality of plate pairs which are overlapped layer by layer; each plat pair comprises upper and lower plate sheets which are arranged oppositely; a plurality of rows of convex ripples and concave ripples are distributed on the upper surfaces of the plate sheets along the same axis direction; the convex ripples and concave ripples are obtained by upwards and downwards pressing and molding the plate sheets; the convex ripples and concave ripples are distributed at intervals; the positions of the convex ripples and concave ripples on the upper plate sheets in the plate pairs correspond to the positions of the convex ripples and concave ripples on the lower plate sheets in the plate pairs; one group of opposite edges of the plate sheets are upwards folded and are transited into planes; the other group of opposite edges of the plate sheets are downwards folded and are transited into planes; the two adjacent folding edges in each plate pair are welded to form an air channel; the two adjacent plate pairs are symmetrical up and down, and the adjacent folding edges between the two adjacent plate pairs are welded to form a flue gas channel. The self-supporting wide gap heat exchanging element has the advantages that a wide gap channel can be combined, dirt and dust are not easy to deposit, the resistance fall also can be reduced and the heat exchanging efficiency is sufficiently improved.

The invention relates to the technical field of shell-and-tube heat exchange, and discloses a spray type shell-and-tube heat exchanger adopting nonmetal heat exchange tubes. The heat exchanger comprises a shell, a sprayer, the heat exchange tubes arranged in parallel in the shell, a supporting plate for supporting the heat exchange tubes and a tube plate connected with the heat exchange tubes, wherein the heat exchange tubes are made of nonmetal material with the heat conductivity coefficient of 0.5 W/m*K-10 W/m*K, and the outer diameter of the heat exchange tubes is 5 mm-15mm. The corrosion prevention problem of heat exchange tubes in low-temperature multi-effect distillation sea water desalting equipment and a lithium bromide absorption refrigerator can be solved, and the spray type shell-and-tube heat exchanger has the advantages of being low in heat transfer temperature difference and cost and the like.

The invention discloses a supercooled liquid nitrogen circulating system based on GM refrigerating machines, which comprises a plurality of GM refrigerating machines which are independently mounted in parallel and are used as system cold sources; each GM refrigerator comprises an independent vacuum cavity and a cold head heat exchanger; the supercooling liquid nitrogen pool and the surge tank are arranged in the vacuum cover, and a main heat exchanger and a precooling heat exchanger are soaked in the supercooling liquid nitrogen pool; the liquid nitrogen pump is connected between the supercooled liquid nitrogen pool and the surge tank; the pre-cooling heat exchanger is located in front of an inlet of the liquid nitrogen pump and used for improving the degree of supercooling when liquid nitrogen enters the liquid nitrogen pump, and the main heat exchanger is located behind an outlet of the liquid nitrogen pump and used for cooling the liquid nitrogen; and the supercooled liquid nitrogen pool is connected with a thermal load at a liquid return port and a liquid outlet through vacuum heat insulation pipes to form a closed liquid nitrogen circulation loop. The long-time stable operation of the liquid nitrogen circulating system can be ensured.

The invention discloses a modular compound type high-energy weapon cooling system and a control method thereof. The modular compound type high-energy weapon cooling system is composed of a high-energy weapon cabin and a cooling equipment cabin. A high-energy weapon and an evaporator are arranged in the high-energy weapon cabin. The periphery of the high-energy weapon and the periphery of the evaporator are filled with phase change materials. A compressor, a condenser, a throttling branch, a bypass branch, a controller, a condenser fluid inlet and a condenser fluid outlet are arranged in the cooling equipment cabin. The evaporator is connected with the compressor, the condenser and the throttling branch in sequence through a refrigerant pipeline. The throttling branch and the bypass branch are arranged in parallel. A throttling device is arranged on the throttling branch, and a bypass valve is arranged on the throttling branch. Under different cooling fluid and high-energy weapon equipment load conditions, two work modes can be achieved in the system according to the periphery temperature of the high-energy weapon. The system has two refrigerating modes, work can be done as long as cooling fluid is provided by an external platform, and flexibility, maneuverability and transportability of the high-energy weapon are greatly improved.

The invention provides a heat exchanger for an indirect air-cooling system of millions of units of a power station. A heat sink comprises a cooling base body and cooling fins, wherein the cooling fins are arranged on the cooling base body. The heat exchanger is characterized in that multiple rows of parallel heat exchange base tube penetrating installation holes are formed in the cooling fins, a bridge-shaped protrusion is arranged between every two adjacent heat exchange base tube penetrating installation holes in each row, and the two ends of each bridge-shaped protrusion are connected with a fin body of the corresponding cooling fin so that a face which forms an angle smaller than or equal to 90 degrees together with the fin body can be formed. The heat exchanger has the advantages that all parts of the heat sink can exchange heat in a balanced mode, and overall heat exchange performance can be effectively enhanced without largely increasing overall resistance of the fins.

A 12kV/4000A high-current gas-insulated metal-enclosed switchgear overcomes the problems of complex structure, large size and low heat dissipation efficiency in the prior art, and is characterized in that a heat dissipation pipe is mounted on a gas tank shell to form a natural convection heat exchange structure, a top heat dissipation box is mounted at the top of the gas tank shell, and a top heat dissipation box is mounted at the bottom of the gas tank shell; the lower end of the main bus in the gas tank shell is connected with a direct-acting three-station double-set disconnecting switch, and the lower part of the direct-acting three-station double-set disconnecting switch is connected with an arc extinguish chamber moving end flexible connector. The beneficial effects of the utility model are that through the heat dissipation structure design of a plurality of components with large heat productivity, the temperature in the air chamber is reduced through natural convection in the closed air chamber, and the problem of large-current temperature rise is solved; the conductive contact area is multiplied through the plurality of flexible connection conductors, and the through-current capability is improved; the size of a single conductive part is reduced through double sets of isolating switches of each phase, and the requirement of 12 kV/4000 A large-current gas insulated metal-enclosed switchgear for the through-current capability is met.

The invention belongs to the technical field of fluidized bed boilers and particularly relates to a circulating fluidized bed boiler for purely burning furfural residues. According to the circulating fluidized bed boiler for purely burning the furfural residues, a high-temperature platen superheater is arranged in a hearth; a fluidized bed combustion chamber is arranged on the lower portion of the interior of the hearth; a wind distribution plate is arranged at the bottom of the fluidized bed combustion chamber; a wind cap is arranged on the wind distribution plate; a wind chamber is arranged below the wind distribution plate; a residue discharge pipe is arranged in the wind chamber; an ignition device is arranged on the wind chamber; the upper portion of a separator communicates with an outlet in the upper portion of the hearth; a lower vertical pipe of the separator is connected with the upper portion of a material return system; the lower portion of the material return system communicates with the fluidized bed combustion chamber; a low-energy-consumption self-balancing material return valve is mounted on a vertical pipe of the material return system; an inlet of a vertical shaft flue communicates with an outlet tube in the center of the upper portion of the separator; an evaporation pipe bundle, low-temperature superheaters, economizers and an air preheater are all arranged in the vertical shaft flue; and the vertical shaft flue is further provided with soot blowing points.

The invention belongs to the technical field of water heaters, and discloses a water tank. The water tank comprises an inner container, the outer wall of the inner container is wrapped with an outer coil pipe heat exchanger, the inner wall of the inner container is provided with a spiral water inlet pipe in an attaching manner, and water enters the water tank, passes through the spiral water inletpipe and then is led into the inner container. The spiral water inlet pipe is arranged on the inner wall of the inner container of the water tank in the attaching manner, after the water enters the water tank, and enters through an inlet of the spiral water inlet pipe, under the water supplementing pressure effect, the ware and the outer coil pipe heat exchanger are subjected to forced convectionheat exchange, the heat exchange coefficient and the heat exchange efficiency are improved, cold water entering the spiral water inlet pipe directly exchanges heat with the outer coil pipe heat exchanger, the temperature of a refrigerant medium in the outer coil pipe heat exchanger does not need to be very high, the heat exchange needs can be met, the energy consumption is effectively reduced, the heat exchange property is improved, and the burdens on a heat pump water heater compressor are reduced.

The invention discloses a high tower tube ventilation cooling performance setting method and device and a tower tube. The method comprises the steps that S1, an initial value of the heat transfer amount of the target tower tube is calculated, and whether the heat transfer amount meets the required heat transfer amount demand or not is judged, and if not, the process goes to step S2; S2, an axial flow fan with specified radiating performance parameter setting is selected as an initial axial flow fan; and S3, the heat transfer amount of the target tower when the axial flow fan with the current setting is arranged on a first layer of platform of the target tower tube is calculated, whether the heat transfer amount meets the required heat transfer amount demand or not is judged, if not, the radiating performance parameter setting is adjusted, and the process returns to step S3, and if yes, the required axial flow fan setting is output. The device comprises a tower tube heat transfer amountjudgment unit, a selection unit and a judgment adjustment unit. Through the method and device, optimal setting of the tower tube ventilation cooling performance can be achieved in combination with the heat transfer characteristics of the high tower tube, and the advantages of the simple implementation method, high setting efficiency, good effect and the like are achieved.

The invention relates to a drying heat exchange system for water-based ink printing, and aims at providing a drying heat exchange system which is good in heat exchange effect and large in heat transfer temperature difference and achieves circulating backheating. The drying heat exchange system comprises a drying air box and a heat exchanger. A medium wave ultraviolet lamp tube is mounted in the drying air box, and mounted on a lamp tube rotator. A glass jalousie is arranged on the front portion of the drying air box, the downstream portion of the heat exchanger is connected with a heat exchange pump, and the heat exchanger and the heat exchange pump are connected through a heat circulating pipe. Two heat exchange areas are arranged in the drying heat exchange system, microwave heating is compounded with heat exchange tube heating, ripples are arranged in a heat exchange tube, heat and mass transfer disturbance is enlarged, heat and mass transfer is benefited, the heat exchange efficiency is improved, and fluid is subjected to circulating heating many times in the heat exchanger. Impurities in air are effectively filtered out, medium wave ultraviolet irradiation is used in the air box, and the situation that the heating temperature of heating materials is too high during shutdown, and consequently the printing materials are baked off is avoided.

The invention discloses an electric compression heat pump combined cascade heat exchange large-temperature-difference pressure isolation unit. The problem of how to stably reduce the return water temperature of a primary network under the condition of meeting the pressure isolation function of a pressure isolation station simply and conveniently at low cost is solved; a pressure isolation heat exchange unit formed by sequentially connecting a plate heat exchanger and four electric compression heat pumps in series is arranged in the pressure isolation station between a primary pipe network anda secondary pipe network, high-temperature hot water of the primary pipe network is stably cooled to the design requirement of the return water temperature of the primary network in a stepped manner,and return water of the secondary pipe network is stably heated to the temperature close to the water supply temperature of the secondary pipe network in a stepped manner through replaced heat and issupplied out after being mixed with output water of the plate heat exchanger. According to the electric compression heat pump combined cascade heat exchange large-temperature-difference pressure isolation unit, and large-temperature-difference pressure-isolation heat exchange between the primary pipe network and the secondary pipe network is easily achieved at low cost.

The invention relates to a mixed filler formula for heat transfer of a ground heat exchanger. The mixed filler formula comprises the following components in parts by weight: 100 parts of cement; 45-58parts of fresh water; 35-38 parts of sand; 0.5-2 parts of retarder; 4-6 parts of silicon powder; 20 parts of fly ash; 1 part of a water reducing agent; 0.01-0.02 parts of an air entraining agent; 0.5-2 parts of graphite; and 2.3 parts of a toughening fiber anti-leakage agent. The mixed filler has a relatively high heat conductivity coefficient; the heat transfer requirement of the ground heat exchanger in a geothermal well cementing filler is met; the heat transfer effect of the ground heat exchanger is improved; the water reducing agent, the air entraining agent, the graphite and the toughening fiber leakage-proof agent are added, the physical property of the mixed filler is modified and optimized, the requirement for rapid well cementation is met, when the mixed filler is used in fractured geology, the purpose of plugging cracks and pores is achieved through the friction, hanging resistance and retention effects between the mixed filler and the pores and between the mixed filler andthe walls of the cracks, the leakage phenomenon is avoided, the well cementation quality is improved, and meanwhile the well cementation cost is saved.