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:Thermal conductive materials used in electrical and electronic equipment that is the best?

Seeing you is what equipment, each has his strong point, general or thermal conductive silicone: scientific thermal conductive paste, thermal conductive adhesive, thermal paste is given priority to. Rapid cooling requirements is not high, and want to operate, suggested thermal conductive silicone pads, thermal double-sided tape and kinds of thermal conductive silicone (used to glue need not buckle with cooling products), the cooling requirements high, better thermal conductive silicone.

Q:What is the working principle of heat pipe

Typical gravity heat pipe, as shown in the airtight tube first into a vacuum, filling the appropriate working medium under this state, on the lower end of the heat pipe heating, laser vaporization heat absorption for steam, under the small pressure difference, up to the upper heat tube, and gives off heat to the outside world, condenses into liquid. Condensate in under the action of gravity, along the heat pipe wall returns to the heating period, and once again heated vaporization, cycling, continuous heat from one end to the other end. Because is phase change heat transfer, heat pipe heat resistance is very small,

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

Working principle is as follows: moisture content in 25 to 40% of the wet material has reunited sex or agglomerate material is entered into the scattered conveying cavity, the high-speed rotation of the rotor was carried out on the material impact, shear, make the material crushing reduction.

Q:What iscalled cooler closed?Is used in cooling water temperature and adding vacuum pump work in the refrigeration system

Retrofit scheme is rod baffle heat exchanger instead of vertical bow plate heat exchanger, without changing the original shell heat exchanger, only change the heat exchanger tube core, is still the vertical installation. Shell side fluid adapted the aspirant, accessory equipment and pipe interface are the same. Heat exchange tube from d19mm x 1 mm brass tube replacement d19mm x 2 mm into boiler seamless steel tubes. Transformation technical agreement requirements, unit with full load, water temperature not less than 21 ℃, modified heater performance test data and calculated results are shown in table 2

Q:new-style

Firing equipment of cement shaft kiln, wet rotary kiln, rotary kiln and ordinary insulating dry kiln, vertical Bohr kiln and preheater kiln (SP) and the current widespread use of the new dry rotary kiln, rotary kiln. Rotary kiln, rotary kiln is a cylinder has a certain slope, slope is 3 ~ 3.5%, with the help of a kiln rotation to promote material stirring in rotary kiln, rotary kiln, the material mixing, contact each other for reaction. Kiln head pulverized coal combustion produces a large amount of heat, heat with the flame radiation, heat convection, brick kiln, kiln conduction to the material. Material depend on kiln shell Angle rotation in the kiln and kiln movement forward..

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:Industrial common heat transfer (heat transfer

Mainly by heat conduction heat transfer, and heat transfer between air and joints are mainly thermal convection.

Q:Why heater before operation will be into the air in the device?

General way of heater is a heating medium for the required material heating, heat conduction oil heater, for example: air does not do, unstable pump pressure, the air blocking in the pipe, heat conduction oil can't circulation, quantity of heat cannot be passed on to the material.

Q:About the elevator parts, up and down through, how this part of the heat load calculation

Heating of the lift shaft need? Need to heat load calculation? For the first time heard that.