At present, Zhejiang resin composite manhole covers have developed rapidly and are widely used in a wide range of fields, bringing a lot of help and convenience to our lives and production. Today I will introduce the contents of the resin composite manhole cover. I hope you can read it carefully.
Next, I will introduce the difference between resin composite manhole cover and cast iron manhole cover :
First on the material: resin: belongs to composite materials. Cast iron: It is an iron material. Stronger than resin.
In terms of molding method: resin: compression molding. Smoother and smoother than cast iron. Cast iron: molten molten iron cast. city
Field recognition: resin: anti-theft, strong acid and alkali resistance. Withstand the wind and sun. The useful life is basically 20-50 years. Cast iron: easy to be stolen, not resistant to acids and alkalis, the normal life span is 5-10 years.
Manhole covers are classified as light and heavy, and heavy-duty roads are generally used. Cast iron manhole covers are generally used, but some Zhejiang resin composite manhole covers have also achieved the bearing standard and the price is relatively cheaper than cast iron. Second, cast iron is easy to be stolen and the loss is large. There is also a cast iron manhole cover that sometimes makes a lot of noise when driving, and the resin is much smaller. And like green belts and sidewalks, the pressure it needs to withstand is not great, and the cost of choosing cast iron is greater. So there are many cases to see which of these two types of manhole covers is good.
Attachment: Solution for contaminated resin composite manhole cover
The composite material is normally regenerated with a certain concentration of H2SO4, and the acid is fed until the acid concentration at the inlet and outlet of the cation exchanger or regenerator is equal; the anion bunk bed is first backwashed and layered, and the weak alkali anion composite material and strong alkali anion composite material are used. Separate, replace with purified water for 30min, then use a certain concentration of NaOH lye for normal regeneration, enter the alkali until the alkali concentration at the inlet and outlet of the negative bunk bed is equal; first rinse the mixed bed anion composite material with purified water for about 30min, and then use a certain amount of The concentration of NaOH lye is normally regenerated, and the alkali is fed until the alkali concentration at the inlet and outlet of the anion regenerator is equal.
That's all for Zhejiang resin composite manhole cover, I hope it will be helpful to everyone.