·The final adjustment of refined oil will be carried out for the third time in the year.
Domestic refined oil prices are the fastest to cut the fastest or cash on June 9. A number of market institutions predicted that the domestic price adjustment window will start on June 9 and the reduction will be between 600 yuan and 700 yuan per ton.
In this regard, analysts believe that it is expected that July 10 may be ushered in another downward adjustment. Whether the reform of the refined oil pricing mechanism can be introduced is still uncertain, and it is possible to launch it at the beginning of July.
Zhuo Chuang information analyst Hu Huichun told the "Daily Economic News" reporter that the downward adjustment is expected to be around 750 yuan / ton.
"The opening of the price adjustment window on June 9 is a foregone conclusion. Considering the status of domestic refinery inventory and the purchase and sale of refined oil products, the National Development and Reform Commission may adjust the maximum price of domestic refined oil products in advance. The price adjustment notice will be released as early as the afternoon of June 8." Zhuo Chuang information analyst Li Qian said.
"This round of price cuts will once again break through the biggest decline in the past three years recorded on May 10 this year. If the calculation is based on the decrease of 600 yuan / ton, 93# gasoline will have an average drop of 0.48 yuan / liter, and 0# diesel will drop. 0.51 yuan / liter." Zhongyu information analyst Wang Jintao said.
According to the forecast of Anxun Siwangwang Energy, the retail price of refined oil will be reduced in two phases. For the first time, it will be lowered by 600 yuan/ton on June 8, or secondly on July 10. The agency calculated that as of June 5, the average price change rate of crude oil in the three places has reached -8.44%, and the average price of crude oil in the three places is about 109 US dollars/barrel, while the average daily price of the latest three crude oils is at About $101/barrel, the difference is about $8/barrel, which is a drop of 7.3%.
This means that even if the retail price reduction is realized on June 8, the price corresponding to domestic and foreign crude oil still has a large price difference. According to the new pricing mechanism to meet the necessary conditions of 4% adjustment, the domestic retail price needs to be further lowered. However, due to the 22 working days, it is expected to be postponed until July 10, and it is possible to usher in another price cut, if crude oil is still at a low level during this period.
The market believes that the relevant departments may introduce a new pricing mechanism by taking advantage of the oil price reduction. The necessary conditions for the launch are that a lower crude oil price level is needed, which will not seriously affect domestic inflation. Second, the domestic and international spreads are high enough to make up for the price level of the previously unconformed portion. The average daily price of the latest three crude oils fell by as much as 1,000 yuan / ton, just the same as the 1,000 yuan level of the unconformed part of the previous NDRC claims.
The boiler water wall is the main radiation heat surface, arranged inside the boiler chamber and proceeds the heat exchange directly with the high temperature flame. The convection tubes are the convection heat surface of the boiler, arranged between the boiler chamber outlet and the end heat surface and proceed the heat exchange directly with the high temperature fume. The water wall and convection tubes are the main heat surface of the boiler, the tubes diameter for both generally usedΦ 51-60mm boiler steel tubes, also as the request.
The first type is the bare pipe water wall. This is the simplest structure of the water wall. The advantage is that ordinary seamless steel pipes can be used, and it is more convenient to replace the water wall pipe. The disadvantage is that the temperature of the furnace wall is still high, and heavy refractory bricks are required. The steel frame of the corresponding boiler should be strengthened. , The air leakage of the furnace wall is relatively large. Old-fashioned high-pressure boilers and medium and small boilers are used more frequently.
The second tupe is the membrane water wall. The membrane water wall is welded by seamless steel tubes with fins. The Water Wall Tubes are connected by fins to make the water wall into a whole. This kind of water wall is called a membrane water wall. Its function is to strengthen the heat transfer of the water wall and greatly reduce the temperature of the furnace wall. The furnace wall does not need refractory bricks, but only requires thermal insulation materials. Compared with the conventional heavy furnace wall, the weight can be reduced by 60% ~ 70%, the furnace wall heat storage is reduced by 80%, the start and stop time is shortened, and the fuel consumption is reduced. The load of the furnace steel frame is greatly reduced, saving refractory materials and steel.
The third type is the pierced pipe water wall. The barbed pipe water wall pipe is made by welding many grab nails with a length of 20 to 26 mm and a diameter of 6 to 12 mm on the water wall pipe. It is mainly used to lay the gas belt. Generally, for boilers that burn fuel with low calorific value and low volatile content, in order to stabilize the fire, pierced pipe water walls are often used for laying the fire protection belt.
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