When choosing the 80-ton gas-fired steam boiler, the price determines the customer's upfront investment cost, so it is as important as the quality. However, the price is not determined by a single factor, it is related to many aspects, the price of 80-ton gas-fired steam boiler will be different with different choices. Let’s talk about what are the main factors that affect the 80-ton gas-fired steam boiler?
The first technical problem is the reconstruction of boiler body:
The coal-fired boiler is mainly grate firing boiler. For small water-tube hot-water boilers, it may lead to the water temperature at the outlet of the riser exceeding the limit or overheating boiling or even vaporization. For shell-and-tube boilers, the rising flue gas temperature at the furnace outlet will make the working conditions of the tube plate worse, thus causing cracks and leakage of the tube plate.
There are many valves commonly used in atmospheric gas-fired boilers, including gate valves and stop valves of main steam valves, water supply valves, check valves, exhaust valves, etc.
When the water pump is turned on, the pressure signal is transmitted to the on-off valve of the atmospheric gas-fired boiler through the pressure pipe, the valve is opened, and the water circulation is carried out. When the water pump stops, the pressure drops, and the on-off valve is closed slowly to av...
Industrial boiler is special equipment, the particularity and complexity determine that safety is its fundamental. In fact, the so-called safety door refers to the boiler explosion-proof door.
In recent years, with the continuous development of new energy technology, China's energy utilization mode has changed from a single form in the past to various forms now. As a green fuel energy, natural gas is widely praised by all levels of society and widely developed and used. Therefore, gas-fired boilers have also become popular boiler equipment in contemporary society.
First of all, don't panic. According to the normal shutdown sequence, check whether the fuel, steam and water valves of gas-fired boiler meet the shutdown requirements.
Secondly, close the surface blowdown valve of the gas-fired boiler to prevent other faults of the boiler. Then, quickly close the main steam valve to prevent the gas boiler drum from losing water.
Thirdly, close the deaerator air supply valve, the main power switch and the natural gas valve. The air inlet of the gas-fired boiler burner should not be blocked to reduce the area of the air inlet, and the room ventilation should not be blocked to avoid the formation of toxic and harmful gases.
Different steam pressures correspond to different steam temperatures.
1. The steam temperature of low-pressure boiler is mostly saturation temperature or not higher than 400℃.
2. The outlet pressure of medium-pressure boiler is 3.8 ~ 5.4 MPa, and the commonly used steam temperature is 450℃.
3. The outlet pressure of sub-high pressure boiler is 5.4 ~ 9.8 MPa, and the common steam temperature is 540℃.
The limited space refers to a space which is closed or partially closed, relatively isolated from the outside world, with narrow entrances and exits, staff can't work in it for a long time, natural ventilation is poor, and toxic, harmful, inflammable and explosive substances or oxygen content is easy to accumulate. To define a limited space, it is necessary to meet the following three conditions at the same time, which are indispensable: the volume is large enough for people to enter completely; Or restrict the entry and exit; It's not designed to stay for a long time.
