We cooperate with Shanghai Jiao Tong University to research, develop and manufacture biomass boilers that use wood chips, straws, palm shells, mesocarp fiber, empty fruit bunch (EFB) fiber, rice husk and other wastes as fuels in order to achieve zero carbon dioxide emissions. After numerous tests and simulations, we have developed a reasonable structure of furnace arch, furnace wall and furnace heating surface that guarantees combustion efficiency and evaporation rate. NOx emissions of our biomass boilers can be as low as 100 mg/Nm3 with thermal efficiencies up to 90%. WUXI ZOZEN BOILERS CO.,LTD. , https://www.cnzozen.com
Drain gate basic knowledge
Drainage gate valve opening and closing pieces is the gate, gate direction of motion and fluid perpendicular to the gate valve can only be fully open and fully closed, can not be adjusted and throttling. The gate has two sealing surfaces. The two most commonly used gate valves have a wedge-shaped sealing surface. The wedge angle varies from valve to valve, typically 50 and 2 ° 52 "" medium temperature "". Wedge gate valve gate can be made as a whole, called the rigid gate; can also be made to produce a small amount of deformation of the gate, to improve its technology to make up for sealing surface angle in the process of deviation, this gate The board is called a flexible gate. Gate valve is closed, the sealing surface can only rely on medium pressure to seal, that is, rely on media pressure to the sealing surface of the gate pressure to the other side of the valve seat to ensure that the sealing surface of the seal, which is self-sealing. Most of the gate valve is forced seal, that is, when the valve is closed, it must rely on external force to force the gate to the valve seat to ensure the sealing surface of the seal. Gate valve gate with the stem for linear motion together, called lifting rod gate valve also known as Ming pole. Trapezoidal thread is usually on the lifting rod, through the valve at the top of the nut and the guide groove on the valve body, the rotary motion into a linear motion, that is, the operating torque into the thrust. When the valve is opened, the fluid path is completely clear when the ram height is equal to 1: 1 of the valve diameter, but this position can not be monitored during operation. The actual use is based on the top of the valve stem as a sign, that is, an open position, as its fully open position. To consider the temperature change lock phenomenon, usually in the open to the top position, and then back 1 / 2-1 lap, as a fully open valve position. Therefore, the valve fully open position, according to the gate position (ie stroke> to determine. Some gate valve, the stem nut is located in the gate, the hand wheel rotates the valve stem to rotate, leaving the ram to lift, this valve Known as the rotating rod valve or dark rod gate valve. Gate valve has the following advantages: fluid resistance is small, the sealing surface of the media by the brush and erosion of the small. Opening and closing more effortless flow of media is not restricted, does not disturb the flow, does not reduce the pressure. Simple, short structure length, good manufacturability, wide range of application. The disadvantages of gate valve are as follows: easy to cause erosion and abrasion between sealing surfaces and difficult to maintain. Large dimensions require a certain amount of space for opening and closing Long. The structure is more complex. Zhaku wide variety, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate, double gate and flexible gate Plate type; Parallel gate type gate valve can be divided into single gate type and double gate type.According to the thread position of the stem division, can be divided into Ming rod gate valve and dark rod gate valve two Gate valve installation and maintenance should pay attention to the following matters: Handwheel, handle and transmission are not allowed to be used for lifting and collision is prohibited. Double gate valve should be mounted vertically (ie stem in a vertical position, hand wheel at the top. The bypass valve with the bypass valve should be opened before opening the bypass valve (in order to balance the pressure difference between the import and export and reduce the opening force with gate valve gear, according to the product manual installation. If the valve is often used, each Lubricate at least once a month.