CN2775451Y

CN2775451Y - Pipeline energy saving electric heating thermal insulation sheet

Info

Publication number: CN2775451Y
Application number: CN 200420012748
Authority: CN
Inventors: 张维新
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-22
Filing date: 2004-11-22
Publication date: 2006-04-26
Anticipated expiration: 2014-11-22

Abstract

The utility model relates to a pipeline energy saving electric heat preservation sheet, which belongs to the electroheat technical field. The utility model aims to solve the shortages that an existing heating and heat preservation electric heating belt of a liquid transport pipeline has complicated structure, high price, low conversion rate between electric energy and thermal energy, and short service life, and has the accident potential of a fire disaster and an electric shock, etc. The electric heating heat preservation sheet is designed and composed of electric heating sheets, insulation layers at both sides of the electric heating sheets, an aluminum foil heat conducting layer outside one insulation layer, and a heat preservation layer outside the other insulation layer, wherein the electric heating sheets are formed by pressing and mixing conductive carbon black, nanometer graphite powder, paraffin wax, latex rubber and liquid state coumarone as dispersant. The utility model is used for heating and heat preservation of an outdoor liquid transport pipeline, which has the advantages of high thermal efficiency, no electric leakage, no water entering, low expenses, long service life, and no accident potential of a fire disaster and is used for heating and heat preservation of a tank oil pipeline of an oilfield individual well.

Description

A kind of pipeline energy-saving electrothermic insulation sheet

Technical field

The invention belongs to the electroheat technology field

Background technique

In some production process, carry as the yard piping of liquid, when ambient temperature is hanged down, need be incubated pipeline, when simple parcel thermal-protective 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 thermal 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, insulation 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 of low value fluid product line transportation, expense is large percentage in cost of production.As the short distance oil transport 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 Environmental Conditions 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 working 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 tube 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 conversion ratio is about 70%, and capacity usage ratio still has space and necessity of raising.

Summary of the invention

The purpose of this utility model provides a kind of pipeline energy-saving electrothermic insulation sheet, overcomes existing use ribbon heater and gives liquid conveyance conduit heat tracing above shortcomings.

Pipeline energy-saving electrothermic insulation sheet of the present utility model is by electric heating piece, the isolation layer on electric heating piece two sides, the aluminium foil heat-conducting layer of the outside of an isolation layer, the thermal insulation layer of the outside of another side isolation layer is formed, electric heating piece of the present utility model is a conductive carbon black, Nano graphite powder, paraffin, latex rubber, the sheet that is pressed into after the liquid coumarone mixing as dispersing agent, 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

Wherein electric heating piece raw material optimum amount parts by weight 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.

Using the good effect of the utility model pipeline energy-saving electrothermic insulation sheet 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 glass wool thermal insulation layer of 3cm outside electric heating element.Circulation water flowing in the pipe, the water flow 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 pressure governor control input 153.6VAC, and after 30 minutes, water-exit temperature all rises to 13 ℃.The ribbon heater power consumption is 215.6W under this experimental condition, the utility model insulation sheet power consumption is 150.58W, electricity, the thermal conversion efficiency indicated by the import ribbon heater are 76% reckoning, electricity, the thermal conversion efficiency of the utility model insulation sheet can reach 99.6%, than being that the pipe insulation mode using electricity wisely of heater is more than 30% with the ribbon heater.

The utility model pipeline energy-saving electrothermic insulation sheet is made the insulation sheet by the common low-temperature insulation material of electric heating piece affix cheaply, cellular insulant and aluminium foil heat-conducting plate, be 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 working life.

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

Description of drawings

Fig. 1 is the utility model pipeline energy-saving electrothermic insulation sheet part sectioned view;

Fig. 2 is the utility model pipeline energy-saving electrothermic insulation sheet electric heating piece layout plan.

Embodiment

Embodiment 1

Provide implementation process of the present utility model below in conjunction with accompanying drawing.

Preparation electric heating piece 1

Get conductive carbon black 500g, the plumbago 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.The sheet that will be pressed into is cut into wide 5mm then, long 400mm, and the bar of formation 220V, 8W, two ends charged source wiring is parallel to 5 electric heating pieces on the power line 5 at a distance of 40mm again, promptly forms complete electric heating piece 1 as shown in Figure 2.

Form the insulation sheet of each layer structure as shown in Figure 1.

(1) adheres to isolation layer 2

Two polyester sheets with 420mm * 200mm, thick 0.2mm.Be clipped in the two sides of electric heating piece 1, form isolation layer 2.

(2) adhere to heat-conducting layer 3

With the aluminium foil of thick 0.08mm,, form heat-conducting layer 3 attached to the outside of an isolation layer.

(3) adhere to thermal insulation layer 4

With the thick plastic blister end of 8mm,, form thermal insulation layer 4 attached to another side isolation layer outside.

Above each of adhering to mutually layer carried out integral body sew up, finally form single jar of oil transport pipeline energy-saving electrothermic insulation of oil well sheet.

The installation that pipeline energy-saving electrothermic insulation sheet of the present utility model 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 transport pipe, extracting power supply cord, outside the insulation sheet, superscribe thermal insulation layer and outer layer plastic film more then, fastening with snap close or adhesive tape, promptly finish the installation of transport 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; The technology of mixing, compressing tablet and system insulation sheet is with embodiment 1.

Claims

1, a kind of pipeline energy-saving electrothermic insulation sheet is characterized in that by electric heating piece (1), the isolation layer on electric heating piece two sides (2), and the aluminium foil heat-conducting layer (3) of an isolation layer outside, the thermal insulation layer (4) of another side isolation layer outside is formed.