It is the main heat exchange to cool or heat the air . It can heat the air with high temperature water, steam or high temperature heat conduction oil, and cool the air with salt water or low temperature water.
Finned Tube is a kind of ribbed wall, many spiral heat exchange surface or threaded tube can also be regarded as finned tube. It plays a significant role in expanding the heat transfer area and promoting turbulence, both for single-phase and phase transition convection heat transfer. Finned tube heat exchanger structure is basically the same with general Shell And Tube Heat Exchanger , but with finned tube instead of flat tube as the heat transfer surface, because of heat transfer enhancement and compact structure, it can be made into a compact heat exchanger.
The Finned Tube Heat Exchanger includes Spiral wound type Air Heat Exchanger, Extruded type air heat exchanger, String type air heat exchanger, High frequency welding air heat exchanger,etc. There are many types of finned tube, we can select the suitable type based on the operating conditions and mediums` characteristics.
Finned Tube Heat Exchanger,Steam Air Preheater,Air Cooled Exchanger,Fin Fan Heat Exchanger Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.heatexchangerjm.com
This year, the market price of polyvinyl alcohol is relatively high, but the trend is relatively flat. Although the market has risen somewhat after the Spring Festival, due to the beginning of the year's price starting at 800 yuan/ton higher than at the beginning of the previous year, the increase in ton price from 400 to 500 yuan is very small compared with the increase of 1,000 to 2,000 yuan in previous years. . After the short-term increase, the market is restrained by the flat demand from the downstream, prices have dropped by around 200 yuan, and the prices of polyvinyl alcohol have been sorted from 13200 to 13300 yuan/ton from March to May. In late May, the market for polyvinyl alcohol rebounded slightly, and the market price returned to around 13,500 to 13,600 yuan/ton, after which the market oscillated in a narrow range on this platform. Until late August, the price of polyvinyl alcohol slowly climbed to 14,000 yuan / ton mark, followed by a modest increase of 200 to 400 yuan / ton, the "Eleventh" before the market price reached 14200 ~ 14400 yuan / ton.
On the whole, the overall trend of the domestic polyvinyl alcohol market this year is stronger than that of the previous year. In particular, the current sharply escalating prices have caused the market to exceed the high point of the previous year. The main reasons for the dramatic increase in the PVA market are the following:
The first is the increase in cost. This year's oil price has risen to a high of US$75/barrel, which has driven up the price of raw materials. At the same time, the rise in oil prices has led to an increase in transportation prices, which has increased the production cost of PVA, and producers have only to maintain normal production by increasing product prices. profit.
Second, the overall price of chemical products has risen. This year, the prices of chemical products have generally risen. Many varieties have reached historical highs, such as "triphenyl", phthalic anhydride, and methanol. The overall price level has raised a certain pulling effect on polyvinyl alcohol.
The third is the reduction in output. Due to the rapid increase in demand, the supply of natural gas is very tight this year, and the gas supply department has reduced the amount of gas used by industrial users. As a result, domestic polyvinyl alcohol production plants using natural gas as raw materials are under-employed, and the market supply is relatively insufficient.
Due to the relatively clear market fundamentals, the polyvinyl alcohol market will continue to operate strongly in the near future. However, due to the price increase and the stagflation of direct raw materials vinyl acetate has a pull force on polyvinyl alcohol, it is expected that the upside for the market outlook will not be too large. .
Polyvinyl alcohol prices hit a new high in the year
After this year's "11," the domestic market has seen a surge in the production of polyvinyl alcohol. The current market prices in East China and other regions have risen to 14,700 to 14,800 yuan per ton, and in some regions, the market price has exceeded the 15,000 yuan per ton mark, setting a new record. The market sales price has been the highest since this year.