CN1780503A

CN1780503A - Electrothermal materials and pipeline energy-saving thermal-insulative fins

Info

Publication number: CN1780503A
Application number: CN 200410011245
Authority: CN
Inventors: 张维新
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-22
Filing date: 2004-11-22
Publication date: 2006-05-31
Anticipated expiration: 2024-11-22
Also published as: CN100566476C

Abstract

The thermo-electric material is made by means of mixing conducting carbon black, nano graphite, paraffin wax, rubber, and liquid coumarone, and pressing them to form a sheet. The energy-saving thermo-electric insulating sheet for pipeline uses the thermo-electric material sheet as heat up layer. Above and under the heat up layer there are insulation layers. Outside of the one face of insulation layer there is aluminum foil conducting layer, and outside of another face of insulation layer is insulating layer.

Description

A kind of thermo electric material and pipeline energy-saving electrothermic insulation sheet

Technical field

The invention belongs to the electroheat technology field

Background technology

In some production process, carry as the yard piping of liquid, when ambient temperature is hanged down, need be incubated pipeline, when simple parcel heat-barrier material still can not meet the demands, also need to adopt the method for heat tracing.In the prior art, the electrical heat tracing of pipeline is to twine commercial ribbon heater outside pipeline, prevents the heat-insulation layer of heat dissipation again on the coated outside of ribbon heater.This shortcoming that with the ribbon heater is the electrical heat tracing of electric heating element exists is: the structure of ribbon heater is complicated, and price is higher.The structure of common ribbon heater is the tin-coated copper twisted wire at center from inside to outside, surrounds the semiconductor core of copper stranded conductor, insulating sleeve, braiding tin-coated copper silk screen, rubber and plastic external protection.The foreign products of import costs an arm and a leg, and is example with ribbon heater produced in USA, and the every linear meter of present price needs 240 yuan of RMB.Be used for the insulation that low value fluid product pipeline is carried, expense is large percentage in production cost.As the short distance oil pipeline that is used for about the Jilin Area oil field individual well tank 10m of northeast heats, and needs to twine ribbon heater 50-70m, drop into 12000 to 16000 yuan of RMB.Though homemade ribbon heater price of the same type is lower, quality does not pass a test, the environment for use bad adaptability.As homemade 25ETV-65-JX ribbon heater, in cold China the Northeast, be used for the electrical heat tracing of outdoor crude oil pipeline, only be 1 year useful life.In a single day this ribbon heater uses life span, can produce explosion, and sparking when oil well has gas to distribute, very easily causes fire.When the ribbon heater inside conductor ruptures, can touch duct wall, cause electric leakage, cause casualty accident.Another deficiency of ribbon heater is that electric energy and heat energy conversion rate are lower, is example with aforesaid U.S. product, and transfer ratio is about 70%, and capacity usage ratio still has space and necessity of raising.

Summary of the invention

The purpose of this invention is to provide a kind of thermo electric material, be used to manufacture the electric heating element of lagging facility, overcome the above-mentioned deficiency of electrical heat tracing electric heating element in the prior art.

Another object of the present invention provides a kind of pipeline energy-saving electrothermic insulation sheet, overcomes existing use ribbon heater and gives liquid conveyance conduit heat tracing above shortcomings.

Thermo electric material of the present invention is by conductive carbon black, Nano graphite powder, paraffin, latex rubber, the sheet that is pressed into after mixing as the liquid coumarone of dispersant, more than the parts by weight of each raw material consumption be: conductive carbon black 0.005-14 part, nano-graphite 0.003-15 part, liquid coumarone 0.002-4 part, paraffin 0.002-6 part, latex rubber 7-17 part.

Thermo electric material raw material optimum amount parts by weight of the present invention are: 5 parts of conductive carbon blacks, 0.1 part of nano-graphite, 2 parts of liquid coumarones, 3 parts in paraffin, 10 parts of latex rubbers.

As heating layer, there is insulating barrier on the heating layer two sides to pipeline energy-saving electrothermic insulation sheet of the present invention by above-mentioned thermo electric material sheet, and there is the aluminium foil heat-conducting layer outside of an insulating barrier, and there is heat-insulation layer the outside of another side insulating barrier.

The good effect that uses thermo electric material of the present invention is to compare with existing ribbon heater, and electric energy transfers heat energy conversion rate height to.Concrete contrast experiment is: get two long 1.8m, the iron pipe of internal diameter 6cm, twine the long existing ribbon heater of 8m on the iron pipe therein, parcel insulation sheet of the present invention on another root iron pipe, the resistance value of the electric heating element on two iron pipes is all 225 Ω, and all wraps the thick mineral wool heat-insulation layer of 3cm outside electric heating element.Circulation water flowing in the pipe, the discharge of two pipes is 1.5 liters of per minutes, initially goes into coolant-temperature gage and is 11 ℃, and voltage AC220V is inserted in the ribbon heater; The insulation sheet is through voltage regulator control input 153.6VAC, and after 30 minutes, leaving water temperature all rises to 13 ℃.The ribbon heater power consumption is 215.6W under this experiment condition, it is 150.58W that the present invention is incubated the sheet power consumption, electricity, the thermal conversion efficiency indicated by the import ribbon heater are 76% reckoning, electricity, thermal conversion efficiency that the present invention is incubated sheet can reach 99.6%, than being that the pipe insulation mode electrical energy saving of heater is more than 30% with the ribbon heater.

Thermo electric material low cost of manufacture of the present invention, common low-temperature insulation material, cellular insulant and the aluminium foil conducting strip of affix made the insulation sheet and is used for the oil field individual well tank oil transportation pipe tracing, Master Cost only needs 1400 yuan, save 92% than using original import ribbon heater, than saving 600 yuan with homemade ribbon heater, be homemade ribbon heater heat preserving mode 5-7 times useful life.

Use insulation sheet of the present invention, quick for installation, convenient, not water funk, leakproof, no-spark, safe and reliable, durable in use.

Description of drawings

Fig. 1 is pipeline energy-saving electrothermic insulation sheet part sectioned view of the present invention;

Fig. 2 is pipeline energy-saving electrothermic insulation sheet heating layer thermo electric material sheet layout plan of the present invention.

Embodiment

Embodiment 1

Get conductive carbon black 500g, the graphite powder 10g of 25nm particle diameter, liquid coumarone 200g mixing and stirring adds paraffin 300g then and mixes evenly, adds latex rubber 1000g again and mixes evenly.The raw material of mixing is divided into 6 equal portions, gets every part of stand and spare in length is the die cavity of 400mm, and evenly imbed the row's thin copper wire that exposes an end, as power supply wiring in the die cavity end positions.Then with 50kg/cm ²Pressure be pressed into the thick sheet of 1mm, be cut into wide 5mm, long 400mm, the bar of two ends charged source wiring forms the electric heating piece of 220V, 8W, 5 electric heating pieces is parallel at a distance of 40mm forms heating layer 1 on the power line.Two polyester sheets getting the thick 0.2mm of 420mm * 200mm are clipped in the two sides of electric heating piece 1 as insulating barrier 2, the aluminium foil that adds thick 0.08mm in the outside of an insulating barrier is as heat-conducting layer 3, add the plastic blister end heat-insulation layer 4 that 8mm is thick in another side insulating barrier outside, at one end be pressed on the thin copper wire of electric heating piece and connect power line, carry out integral body and sew up the back and form single jar of oil pipeline energy-saving electrothermic insulation of oil well sheet.

The installation that pipeline energy-saving electrothermic insulation sheet of the present invention is inculcated on the oil-piping at oil field individual well is: will be incubated sheet has the one side of aluminium foil to encase pipeline inwardly, to be incubated sheet with snap close or adhesive tape is fixed on the pipeline, each is incubated sheet and is connected mutually, encase the whole piece petroleum pipeline, extracting power supply cord, outside the insulation sheet, superscribe heat-insulation layer and outer layer plastic film more then, fastening with snap close or adhesive tape, and the probe of the temperature detect switch (TDS) that can buy in the shop is housed between the insulation sheet of the end of pipeline and pipeline, temperature detect switch (TDS) is serially connected on the power line, and the pipeline that the insulation sheet is wrapped up maintains in the range of set temperature.Below promptly finish the installation of individual well tank oil transportation pipe insulation sheet.

Embodiment 2

Get 14 parts of conductive carbon blacks; 15 parts of nano-graphites; 4 parts of liquid coumarones; 0.002 part in paraffin; 7 parts of latex rubbers; The technology of mixing, compressing tablet and system insulation sheet is with embodiment 1.

Embodiment 3

Get 0.005 part of conductive carbon black; 0.003 part of nano-graphite; 0.002 part of liquid coumarone; 6 parts in paraffin; 17 parts of latex rubbers; Mixing, compressing tablet and system technology are with embodiment 1.

Claims

1, a kind of thermo electric material is characterized in that by conductive carbon black, Nano graphite powder, paraffin, latex rubber, the sheet that is pressed into after the liquid coumarone mixing as dispersant; More than the parts by weight of each raw material consumption be: conductive carbon black 0.005-14 part, nano-graphite 0.003-15 part, liquid coumarone 0.002-4 part, paraffin 0.002-6 part, latex rubber 7-17 part.

2,, it is characterized in that each raw material consumption parts by weight is: 5 parts of conductive carbon blacks, 0.1 part of nano-graphite, 2 parts of liquid coumarones, 3 parts in paraffin, 10 parts of latex rubbers according to a kind of thermo electric material of claim 1.

3, a kind of pipeline energy-saving electrothermic insulation sheet, it is characterized in that thermo electric material sheet by claim 1 or 2 is as heating layer (1), there is insulating barrier (2) on the heating layer two sides, and there is aluminium foil heat-conducting layer (3) outside of an insulating barrier, and there is heat-insulation layer (4) outside of another side insulating barrier.