Q:What are the factors affecting heat transfer rate of the chemical equipment

Cold and hot medium temperature, cold and hot, cold and hot medium heat transfer medium flow state if (fluid), thermal conductivity, heat transfer interface and other hot and cold medium heat capacity, etc

Q:Use finned tube condenser and evaporator, its fin spacing of how to choose

Life experience tells us: radiator area is larger, the higher surface temperature (that is, the bigger the temperature difference between surface temperature and air), the longer the heating time, the heat transfer, the greater the room more warm. This suggests that the convective heat transfer and heat transfer area is proportional to, and is directly proportional to the difference in temperature, and time is proportional to the. In order to compare the strength of the convective heat transfer under different conditions, we need to define a physical quantities, is called the "heat transfer coefficient. Heat transfer coefficient is refers to the unit area, the unit temperature difference (temperature difference between wall and fluid), convective heat per unit time. Its unit is J/(s. ㎡. ℃) or W/(㎡ ℃). The convective heat transfer coefficient is commonly used symbol h.

Q:Now I want to in big drying equipment in stainless steel heating tube or quartz heating tube to see what kind of heat transfer is fast

Heating up fast, of course, quartz heating tube, but the product is fragile, brittle, scrap rate is high

Q:The working principle of new special viscous material scatter equipment?

Break up after the material fall into drying equipment inside the cylinder, the material in the drying drum under uniform of copy board flipping, evenly dispersed in contact with the hot air fully and achieve drying of heat and mass transfer.

Q:The types of heat exchangers have?

A, according to the principle of classification: 1, direct contact heat exchanger The main working principle of this kind of heat exchanger are two medium by contact and mutual transmit heat, heat transfer, contact area directly affect the heat transfer, this kind of heat exchanger is usually a medium is gas, another is liquid, mainly tower equipment as the main body of the heat transfer equipment, but usually involves the mass transfer, so it is difficult to distinguish the relationship with columns, usually under centralized for tower equipment, power plant with cooling tower is the most typical direct contact heat exchanger. 2, energy storage heat exchanger (hereinafter referred to as the accumulator, the dosage is very few, this kind of heat exchanger is hot medium by heating a solid substance first after reaching a certain temperature, cold medium through solid matter is heated, to reach the purpose of the heat transfer. 3, recuperative heat exchanger Dosage is very large, this kind of heat exchanger accounted for more than 99% of the total, the principle is the hot medium of heat transfer over a metal or non-metal cooling medium, we usually referred to as this kind of heat exchanger tube and shell or plate, plate type, fin type heat exchanger.

Q:Should be prepared to what kind of equipment and materials and tools and equipment?

The type of tube plate heat exchanger and work Plate heat exchanger can be divided, according to the corrugated heat exchanger plate can be divided into according to washer and management unit, wave can be divided into one word, direct wave, spherical wave, in the form of bond type. The combination of various forms, in order to meet the needs of different working conditions, the use of more targeted. The herringbone corrugated plate as the same piece is sealed with adhesive type or management unit may be different, the use of management unit gasket glue may contain chlorine ion, can effectively prevent the corrosion of plates, and more convenient disassembly of the equipment. Another example is the temperature and pressure welding plate heat exchanger is significantly better than the removable plate heat exchanger, can reach 250 ℃, 2. Mpa. The same plate heat exchanger, the diversity of the form, can be applied to a wide range of areas, and can be used in most of the heat exchange process.

Q:How to prevent thermal equipment scale?

After thermal equipment fouling, often caused by poor heat transfer tube wall temperature, when the temperature exceeds the metal can allow temperature, it could cause bulge and pipe explosion accidents. Water boiler water slag is too much, can affect the boiler steam quality, and perhaps blocking furnace tube, threatening the safe operation of boiler. In order to prevent fouling thermal equipment, from the following several aspects: (1) try to reduce the water hardness. (2) as far as possible to reduce silicon compounds to water, the content of aluminum and other metal oxides. (3) reduce the iron content in the water of boiler, increase the iron removal equipment. (4) reduce the copper content in water, adding complexing agent to the boiler water. (5) good feed processing, to prevent corrosion.

Q:What is the difference between diversion in heat exchanger heat exchanger and diversion?

About the difference between the diversion of the heat exchanger and the diversion of the heat exchanger in I can give you a www.etewx has introduced above you can go to see the hope to help you understand heat exchanger

Q:How hot is spread from one end of the metal strip to the other end of the

Mainly through the way of heat transfer, by metal molecular vibration energy transmission to the surrounding molecules to transfer heat. Heat conduction is no macroscopic movement at the time of the heat transfer phenomena in the medium, its all can happen in solid, liquid and gas, but strictly speaking, only is the pure heat conduction in solids, and fluid even in static state, which will be due to the temperature gradient caused by the natural convection resulting from the density difference, therefore, the heat convection and heat transfer in the fluid at the same time.

Q:What are heat exchange equipment

In the chemical plant, so the heat exchange equipment investment accounted for about 10% ~ 20% of the total investment; In the refinery, accounts for about 35% ~ 35% of total investment. Over the past 20 years, so the heat exchange equipment in energy storage, conversion, recovery, and new energy utilization and has been widely used in pollution control.