Long car continuous tie-dyeing natural gas infrared pre-drying and priming equipment

The infrared ray is easy to be absorbed by water and can penetrate the characteristics of a certain thickness of materials, can be used to dry materials, characterized by fast speed, high production efficiency.

Compared with other infrared burners, the Blue Torch infrared radiator has unique advantages: Due to the small thermal inertia of the material, it can quickly heat up and cool down, that is, after ignition, its temperature can rise from normal temperature to working temperature within a few seconds, and similarly, after stopping work, it can also cool from working temperature to normal temperature within a few seconds, which is very beneficial for preventing materials from being damaged due to excessive heating, especially for completely avoiding flammable items such as paper and fabrics from catching fire due to overheating when encountering extraordinary accidents such as power failure.





Dyed fabric before drying, need to quickly remove a part of the water, otherwise, dye molecules will occur migration resulting in uneven color. This rapid moisture removal process is a pre-drying primer process, usually using electric infrared heating, and electric infrared heating system not only has high energy costs, but also the heating element declines severely and has a short life. The more moisture is removed in the pre-drying process, the more uniform the color and quality of the finished fabric, and the less energy is consumed in the subsequent drying process.



Blue torch gas infrared priming system features:

1. Use gas fuel, significantly reducing energy costs compared to electric heating systems;

2. Adopt gas infrared burner, high combustion efficiency, large radiation coefficient;

3. Large heat load adjustment range, high moisture removal rate, good priming effect;

4. After shutdown, it can be cooled within a few seconds, which can effectively avoid fire accidents caused by unexpected power outages.

5.  Use program controller to control the system, pressure protection, unexpected shutdown alarm and other functions.

6. Each row of burners is independently controlled, and some or all burners can be opened according to process needs;

7.  The burner has a long service life of up to several years.



product presentation

I. Principle of radiation

Any object radiates energy to the outside world. According to Boltzmann's law, the relationship between the energy radiated by an object and the temperature follows the following formula:

E=σ T4   It can be seen that there is a fourth-power relationship between the energy and temperature of the object radiation, that is, the higher the temperature of the object, the greater the energy radiated to the outside. The heat generated by the combustion of gas can raise the temperature of the object to 800-1000 ° C, thereby radiating intense infrared rays with a corresponding wavelength of 2-4 m.

Second, infrared heating (drying) principle

Infrared is invisible light that travels straight at the speed of light and has a certain penetration. After infrared rays are absorbed by objects, they can be quickly converted into heat energy, which has a strong heating effect.

Different materials have different absorption rates for infrared rays. Water is one of the substances that can absorb infrared rays strongly. After water absorbs infrared rays, its temperature rises rapidly and evaporates. This is the principle of infrared drying. Infrared heating is several times faster than conventional hot air heating, so infrared can be used in situations where rapid heating and drying are required.

III. Blue torch gas infrared heating unit

1. The use of fully premixed combustion principle, full combustion, low pollutant emissions.

2. Alloy material as heating element, resistant to mechanical shock and thermal shock, long service life.

3. High radiation temperature and high radiation intensity ensure rapid heating.

4. The special structure ensures a large range of load adjustment and increases flexibility in use.

5. It can be combined into heating equipment of different specifications according to needs, and it is convenient to replace.

6. It can be applied to various occasions requiring heating or drying, such as drying of paper and fabrics, curing of coatings, baking equipment, etc.

IV. Specifications

Shape: 150mm (L)*200mm (W)*40mm (T)

Heating power: 3-25kw

Gas consumption: 0.23-1.95kg/h (liquefied gas) or 0.3-2.5m?/h h (natural gas)

V. Application examples

A fabric surface coated with water-soluble glue needs to be dried quickly. Fabric width 2060mm, initial moisture content 760g/m?, The moisture content after infrared drying system is required to be reduced to 150g/m?, Speed 3-5m/min.

The system uses 56 heating units, divided into 4 groups, each group of 14, each unit design heating power is 7.5kw, a total of 420kw.

An inorganic fabric with high moisture content and very fragile after molding was originally heated by electric infrared with a total heating power of 174kw. After modification, liquefied petroleum gas is used, heating power is adjustable from 170 to 400kw, infrared heating mode is adopted, closed heating system is adopted, combustion program control is adopted, and functions such as pre-purge, gas and air pressure protection, automatic ignition, flame detection, unexpected shutdown alarm, etc. are provided. Production efficiency can be doubled, and unit energy cost can be reduced by 28%. The low thermal inertia of metal fiber can effectively ensure that the fabric will not be discolored and yellowed due to residual heat when it is stopped unexpectedly due to power failure.