An Interlock in the boiler’s control system is a programmed or hardwired condition that forces a device to be in a pre-determined or permissive state before the process can continue.
Depending on design pressure, fuel type, either liquid, gas or solid, all steam boiler require interlocks to sequence the operation and to prevent damage to the boiler. Examples of such devices are High or Low Boiler Drum Water Level, Low Boiler Feed Pump Pressure, High or Low Fuel pressure, High or Low Atomization pressure (oil fired), Proof of Ignition, Proof of Flame, FD and/or ID (solid fuel) Fan Motor Operation or combustion air pressure, Damper or Valve position and High Boiler Steam Pressure as well as O2 and furnace temperature.
The boiler manhole-lids are mounted from the inside of the boiler so that the boiler pressure will help to keep them tight. Hence the manholes have to be elliptical in shape to make it possible to take the lid out from the boiler.
The main working principle of industry is a kind of heating equipment which uses the heat energy released after fuel combustion or the waste heat in industrial production to transfer to the medium in the container, so that the medium can reach the required temperature, and then it can be transported to the heating process for heat exchange. According to different media, boilers can be divided into many types.
Types of boiler heating medium
1. Steam, steam boiler and superheated steam b...
In the combustion process of solid fuel, some fuel often leaves the boiler with ash or fly ash without burning. This part of heat loss is called the heat loss of incomplete combustion of solid, which means q4 in boiler.
According to the inverse balance calculation formula of boiler thermal efficiency, the thermal efficiency of the boiler is equal to the calorific value minus various heat losses. For the boiler with solid fuel, the heat loss of solid incomplete combustion is the main heat loss i...
Boiler ventilation refers to the technology of continuously sending the air needed for fuel combustion into the boiler hearth, and discharging the exothermic flue gas out of the furnace in time to ensure the stable and efficient operation of the boiler. Do you know what kinds of ventilation methods are available for boilers? How to choose. In this article, ZOZEN will introduce several kinds of ventilation modes of boilers.
According to the different causes, what are the ventilation mode...
To meet the demand of clean heat, gas-fired boiler has become the necessary heating equipment for most enterprises. However, users still don't know much about the gas boiler system, and they often encounter the selection of auxiliary equipment such as condensate traps in the flue of gas boilers when purchasing boilers. Here, ZOZEN Boiler introduces the working principle of condensate traps in gas boiler flue.
Condensate water trap of boiler flue
Condensate water trap in gas flue of boi...
In recent years, with the rapid development of economy, the demand for boilers has also increased. During the daily operation of the boiler, it mainly consumes fuel, electricity and water, among which the water consumption of the boiler not only relates to the cost accounting, but also affects the calculation of the boiler water supply. This paper introduces the water consumption of a boiler by taking the one-hour water consumption of a steam-ton boiler as an example.
The water consumpt...
Boiler safety accessories mainly refer to pressure gauge, water level gauge, safety valve, steam-water valve, sewage valve and other accessories. These accessories are very important for the safe operation of the boiler, especially the pressure gauge, water level gauge and safety valve, which are the basic accessories to ensure the safe operation of the boiler. Therefore, they are usually called the three safety accessories of industrial boilers. Knowing the three safety accessories of boiler is...
