What equipment does the steam water system of the circulating fluidized bed boiler include?

Tail economizer, steam drum, water cooling system, imported flue of air-cooled cyclone, air-cooled cyclone, wall superheater, low-temperature superheater, screen superheater, high-temperature superheater and connecting pipes, low-temperature reheater, screen reheater and connecting pipes.

The circulating fluidized bed boiler adopts the most industrialized clean coal combustion technology. The circulating fluidized bed boiler adopts fluidized combustion, and the main structure includes two parts: combustion chamber (including dense phase zone and dilute phase zone) and circulating return furnace (including high-temperature gas-solid separator and return system).

The biggest difference with bubbling fluidized bed combustion technology is the high operating wind speed, which strengthens the heterogeneous reaction processes such as combustion and desulfurization, and the boiler capacity can be expanded to a large capacity (600MW or above) acceptable to the power industry.

The circulating fluidized bed boiler has well solved the basic problems of thermal, mechanical, material science and engineering problems such as expansion, wear and overtemperature, and has become an advanced technology for the energy utilization of refractory solid fuels (such as coal gangue, oil shale, municipal garbage, sludge and other wastes).

The circulating fluidized bed boiler system is usually composed of a fluidized bed combustion chamber (furnace), a circulating ash separator, a fly ash return device, a tail heating surface and auxiliary equipment.

The circulating fluidized bed boiler system is usually composed of a combustion system and a steam-water system, and the fuel completes the combustion process in the combustion system of the boiler, and converts the chemical energy into the heat energy of the flue gas through combustion to heat the working fluid; The function of the steam water system is to absorb the heat of the flue gas through the heating surface, and complete the process of transforming the working fluid from water to saturated steam and then to superheated steam.

1. The main auxiliary equipment of the circulating fluidized bed boiler combustion system includes coal crushing equipment, coal feeding equipment, ash cooling and treatment equipment in front of the furnace. Limestone conveying equipment and fans for various purposes, such as primary fans, secondary fans, induced draft fans, coal seeding and pressurizing fans, high-pressure fluidization fans, ignition oil systems, dust removal equipment, pneumatic and hydraulic ash removal equipment, etc.

2. The basic characteristics of circulating fluidized bed boiler are as follows:

1) Low temperature power control combustion. The rate of combustion depends mainly on the rate of chemical reactions and is determined by the temperature level. Physical factors are no longer the dominant factor controlling combustion.

2) High-speed, high-concentration, high-flux solid material flow cycle process. All the combustion of the circulating fluidized bed boiler is done step by step in these two forms of circular motion.

3) High-intensity heat, mass, and momentum transfer processes. The heat of the circulating fluidized bed boiler is mainly realized by the circulation of solid materials with high speed, high concentration and high flux, and the transfer and exchange of heat, mass and momentum in the furnace is very rapid, so that the temperature distribution is very uniform from the whole furnace.

4) The load is different, the fluidization state changes, and the minimum is 0.

The steam-water system of circulating fluidized bed boiler generally includes tail economizer, steam drum, water cooling system, inlet flue of steam-cooled cyclone separator, steam-cooled cyclone separator, wall superheater, low-temperature superheater, screen superheater, high-temperature superheater and connecting pipes, low-temperature reheater, screen reheater and connecting pipes. You can pay attention to the boiler anti-wear and explosion-proof net.

Hello, because the circulating fluidized bed boiler adopts the most industrialized clean coal combustion technology. The circulating fluidized bed boiler adopts fluidized combustion, and the main structure includes two parts: the combustion chamber (including the dense phase zone and the dilute phase containing the world) and the circulating recoiling furnace (including the high-temperature gas-solid separator and the return system).

Hello dear, I'm glad to answer for you. The principle of circulating fluidized bed boiler is: the first base mode air and the secondary air required for the combustion of circulating fluidized bed boiler are fed from the bottom and side wall of the furnace respectively, and the combustion of fuel is mainly completed in the furnace, and the reeds around the furnace are equipped with water walls to absorb part of the heat generated by combustion.

The solids carried out of the furnace by the gas flow are collected in the gas-solid separation unit and sent back to the furnace by means of a return device. 2. Circulating fluidized bed boiler technology is a high-efficiency and low-pollution clean combustion technology that has developed rapidly in the past ten years. Internationally, this technology has been widely used in the fields of power station boilers, industrial boilers and waste treatment and utilization, and has developed to large-scale circulating fluidized bed boilers with a scale of hundreds of thousands of kilowatts. The research, development and application in this area in China have also gradually emerged, and hundreds of circulating fluidized bed boilers have been put into operation or are being manufactured.

The next few years will be an important period for the rapid development of circulating fluidized beds.

Summary. Dear, glad to answer for you! Circulating fluidized bed boiler boiling pressure refers to:

It is a direct parameter basis for reflecting the power working conditions in the furnace. Abnormal combustion in the furnace, changes in the supply of wind and coal, abnormal power equipment, changes in external loads and leakage on the steam side, any change in either side will cause the furnace outlet pressure to change.

Dear, glad to answer for you! The boiling pressure of circulating fluidized bed boiler refers to a direct parameter basis that reflects the power conditions in the furnace.

Abnormal combustion in the furnace, changes in the supply of wind coal or abnormal power equipment, changes in external loads and leakage on the steam side, any change will change the pressure of the furnace shed chamber outlet.

Dear, the expansion content is as follows: seep the shed dry oh <>

How to judge the quality of the boiler temperature field is as follows: only when the thermal balance of the combustion chamber is reached, there is an ideal temperature field in the furnace. The temperature difference in the combustion chamber of the circulating fluidized bed boiler is 20 longitudinally and transversely, and the maximum temperature is not more than 50.

Each part of the furnace can ensure that the designed heat release coefficient is realized, and all kinds of heat can absorb the required enough heat, so as to achieve the heat balance of each part and ensure the output of the boiler.