CN109575667A

CN109575667A - A kind of thin layer heat-barrier material

Info

Publication number: CN109575667A
Application number: CN201710900706.7A
Authority: CN
Inventors: 祝凤娟
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-09-28
Filing date: 2017-09-28
Publication date: 2019-04-05

Abstract

A kind of thin layer heat-barrier material, preparing raw material includes: film forming binder, heat preservation filler and reflection filler, auxiliary agent, and in conjunction with the thin layer thermal insulation coating with high radiant rate, it can make up conventional insulation material convective heat transfer and the more difficult reduced deficiency of radiant heat transfer.The thermal insulation coatings exist in a manner of liquid coating, and the coating resistance after drying is larger, and especially heat reflectivity is high, can be effectively reduced radiant heat transfer, and easy for construction, coating is thin, and seamless, adhesive force is good, protect Yu Yiti outside collection waterproof and heat-insulating.Insulation grade is R21.1, heat reflection degree 0.79, thermal emissivity rate 0.83.Solid content 54%, it can directly be used with coating way, it can also be used as the heat-insulation and heat-preservation of petroleum and petrochemical industry product tank and storage tank, the cold insulation of pipeline and equipment and roofing heat preservation and insulation coating, synthesis energy saving high efficiency with the compound composition Low emissivity heat transfer structure of other porous insulation materials.

Description

A kind of thin layer heat-barrier material

Technical field

It is especially a kind of with high radiance the present invention relates to a kind of heat-barrier material, it is thin to can effectively reduce radiant heat transfer Layer heat-barrier material.

Background technique

Reflective heat-insulation paint is developed on the basis of aluminium base reflective heat-insulation paint, by select suitable raw material and Formula etc., is made high reflectivity coating, and reflected sunlight reaches heat-insulated purpose.Thin layer heat insulating reflecting coating is this kind of coating It represents.It is made of base-material, heat reflection pigments and fillers and auxiliary agent etc..

The heat reflectivity of this thin layer heat insulating reflecting coating is high, and generally 80% or more, heat-blocking action is obvious.But institute as above It states, color has a significant impact to heat reflectivity.In addition, although thin layer heat insulating reflecting coating heat transfer coefficient is not high, itself thermal resistance compared with Greatly, but because coating thickness is than relatively thin, entire thermal resistance is limited, and heat insulation effect is little.It can be used cooperatively with other thermal insulation materials.Reflection every Hot thermal insulation coatings, coating be one pack system bone white slurry, -30--120 DEG C of heatproof amplitude, have efficiently, thin layer, heat-insulation and heat-preservation, Decoration, fire prevention, anti-corrosion, electrically isolates from integrated novel space energy-saving reflecting heat insulating coatings at waterproof, and coating can be in body surface Three-dimensional network ceramic fibre shape structure together is connected by closing microballon, the insulation grade of coating reaches R-30.1, heat Reflectivity is 90%, thermal coefficient 0.04W/m.K, can effectively inhibit the radiant heat of the sun and infrared ray and conduction heat, heat-insulated suppression Up to 90% or so, the heat being able to maintain in 70% object space is not lost efficiency processed.The resistance to height of ZS-1 thermostable heat-isolating coating It is raw material, heatproof amplitude-that warm heat insulating coatings, which have all selected nano ceramics cenosphere, aluminosilicate fiber, various reflecting materials, 80-1500 DEG C, can all there was only 0.03W/m.K directly facing flame heat-insulation and heat-preservation, thermal coefficient, effectively can inhibit and shield The conduction of the radiant heat and heat of infrared ray, heat-insulated inhibition efficiency can inhibit the heat radiation and heat of high temp objects up to 90% or so Amount is scattered and disappeared, to cryogenic object can effectively cold insulation and can inhibit environmental radiation it is hot caused by loss of refrigeration capacity, be also possible to prevent object The generation of body condensation.

Summary of the invention

The purpose of the invention is to make up the deficiency of conventional insulation material, a kind of thin layer with high radiant rate is devised Heat insulating coatings.

The technical solution adopted by the present invention to solve the technical problems is:

The raw material for preparing of thin layer thermal insulation coating includes: film forming binder, heat preservation filler and reflection filler, auxiliary agent.

The preparation step of thin layer thermal insulation coating are as follows: open high-speed mixer, under moderate rotation, deionization is added The auxiliary agents such as water, dispersing agent, defoaming agent, coalescing agent, fire retardant add after being uniformly dispersed and then under adjustment speed to fast state Enter film forming binder, heat preservation filler and reflection filler etc., high-speed stirred 30~40 minutes to uniform state.

The detecting step of thin layer thermal insulation coating are as follows: for the heat preservation and insulation of detection thin layer thermal insulation coating, benefit Comparative test has been carried out with heat insulation and preservation effect of the round tube method measuring thermal conductivity device to thin coatings and its composite construction.In perseverance Under fixed medium temperature, after total up to after thermal steady state, survey its medium temperature, surface temperature, surface heat flux and Environment temperature at that time.With the calculating of level-one method of testing, it is that hot-fluid is close that measured surface temperature, which is pressed indoor heat exchange formula scales, Degree, then it is average with measured heat flow density value, entire heat dissipation capacity is calculated, is analyzed.

The beneficial effects of the present invention are:

(1) it can be used within the temperature range of -30-180 DEG C.(2) thermal conductivity at normal temperature reaches lower 0.0474W/(mK).(3) water resistance is good, and coating can be stablized in moist or natural environment to be used.(4) for storing up The heat preservation of tank and the occasion of cold insulation can not have to outer shield.(5) preferably, cold cycling compares the elasticity of coating in refinery industry It is used under frequent operating condition, the crackle that can be generated to avoid general thermal insulation material by breathing guarantees its heat insulation effect.

(6) there are higher reflectivity and radiance, the transmitting of heat can be reduced, improve heat insulation effect.(7) any clean Only, there is very strong cohesive force on the dry, surface without greasy dirt.

Specific embodiment

Case study on implementation 1:

When medium uses temperature at 40-100 DEG C, the thin-walled insulation of 1.0mm, 2.0mm thickness is smeared respectively in the outer surface of round tube Coating surveys the relationship of its medium temperature and surface heat radiating loss, it can be seen that with the increase of coating layer thickness, coating outer surface temperature Degree and radiation loss have certain reduction, but amplitude is little.Because single structure is for keeping the temperature, heat insulation is directly proportional to thermal resistance , thermal resistance again it is directly proportional to coating layer thickness, because thickness is too thin, thermal resistance is limited, thus by increase thickness raising heat insulation without Ji, the feature that its heat reflectivity should be utilized high, design air layer material constitute Low emissivity heat transfer structure with it, and effect can be more preferable. And do not kept the temperature in current general product tank, only make preservative treatment, but in summer high-temperature season, due to the photograph of solar ultraviolet It penetrates, internal oil temperature can increase, and for safety, need to take cooling measure to it, if cooling down by spraying a large amount of water, both waste Valuable water resource, is also easily destroyed erosion resistant coating, accelerates the corrosion of tank body.Such as in outer surface spraying 1mm or so thick heat-insulation and heat-preservation Coating can reflect back the radiation energy that most solar ultraviolets irradiate, in addition the thermal resistance of coating, can make warm inside and outside tank body Difference then can guarantee that tank body is safely operated up to 8-12 DEG C.The coating is in huge port cleaning oil pipe slot exterior insulation work application, coating Thickness 0.5-1mm effectively keeps temperature in slot and changes in suitable range, and winter does not freeze.Simultaneously demonstrate this every Hot coating cohesive force is good, good waterproof performance, good toughness, and there are also anti-corrosions and outer shield to act on.

Case study on implementation 2:

The thin coatings of 0.3mm thickness are smeared outside the modeling bubble that thickness is 6.5mm, when medium temperature is 55 DEG C, surface temperature is 29 DEG C, surface heat radiating loss 59W/m²;When medium temperature is 70 DEG C, surface temperature is 33 DEG C, surface heat radiating loss 94W /m², it is equivalent to the energy-saving effect of general petroleum tank heat preservation.Medium temperature inside petroleum tank is generally 40-70 DEG C.Crude oil at present Tank heat preservation use description of materials it is more, have the polyurethane foam of 40mm thickness, the polyethylene of 50mm thickness, 50-60mm thickness Rock wool etc., construction trouble, structure is not easy to handle, also needs additional waterproof outer jacket.According to above-mentioned analog reslt, can be used The thin layer thermal insulation coating of 0.3mm thickness and the modeling foam material of 10mm thickness are used in combination, and comply fully with requirement.And it constructs It is convenient, outer jacket can be also saved, overall economic efficiency is high.

Case study on implementation 3:

In the range of 200-300 DEG C, after the thin coatings that the outer surface of 70mm thickness rock wool is smeared to 0.5mm thickness, it can reduce Radiation loss 6.3%, it is substantially suitable with the heat insulation effect of the thick common rock wool of 80mm.

Case study on implementation 4:

Cold insulation material used at present mainly has polyurethane foam and foam glass etc..Polyurethane foam resistance to ag(e)ing is poor;Foam Glass is profile, and seam and contact are difficult to handle, and at high cost.Cold insulation is that partition outside heat is internally transmitted, cold insulation knot Structure key technology is good airproof performance, airtight, bulging gap of not leaving a blank, and waterproof is good.The thin layer thermal insulation coating heat reflectivity is high, Good waterproof performance, it is anti-aging, it can be matched directly as cold insulation material using or with other cold insulation structures material that is sealing adhesive, it will Cold insulation effect is significantly improved, and outer jacket structure is omitted or simplified.

Case study on implementation 5:

Building energy conservation increasingly attracts people's attention, and roof leakage is also always insoluble problem.By the heat-insulated guarantor Thermo-paint and other roofing moisturizing Material claddings are used for roof insulation and waterproof leakproof, can make to build cool in summer and warm in winter.The coating every Hot good, ageing-resistant, good waterproof performance, good toughness, long service life will have wide application market.

Claims

1. a kind of thin layer heat-barrier material, preparing raw material includes: film forming binder, heat preservation filler and reflection filler, auxiliary agent.

2. thin layer thermal insulation coating according to claim 1, it is characterized in that the preparation step of thin layer thermal insulation coating Are as follows: high-speed mixer is opened, under moderate rotation, deionized water, dispersing agent, defoaming agent, coalescing agent, fire retardant etc. is added and helps After being uniformly dispersed and then under adjustment speed to fast state, film forming binder, heat preservation filler and reflection filler etc., high speed is added in agent 30~40 minutes are stirred to uniform state.

3. thin layer thermal insulation coating according to claim 1, it is characterized in that the detecting step of thin layer thermal insulation coating Are as follows: for the heat preservation and insulation of detection thin layer thermal insulation coating, using round tube method measuring thermal conductivity device to thin coatings and The heat insulation and preservation effect of its composite construction has carried out comparative test: under constant medium temperature, reaching thermostabilization to total After state, its medium temperature, surface temperature, surface heat flux and environment temperature at that time are surveyed, with the calculating of level-one method of testing, It is heat flow density that measured surface temperature, which is pressed indoor heat exchange formula scales, then average, the meter with measured heat flow density value Entire heat dissipation capacity is calculated, is analyzed.

4. thin layer thermal insulation coating according to claim 1, it is characterized in that the performance of thin layer thermal insulation coating are as follows: absolutely Hot grade R21.1；Heat reflectivity 0.79；Thermal emissivity rate 0.83；Solid content 54%；Water Resistance Test (soaking at room temperature 10d) coating without Variation；Light aging test (400h) is 1 grade of dusting, is changed colour 1 grade；10 circulations of coating temperature-change resistance (- 30-50 DEG C) are without exception； Performance indicator reaches the technical level of same kind of products at abroad.