How to ensure the long term operation of circulating fluidized bed boiler

Here can only be simply forgiven by you, because fluidized bed boiler technology includes too much content and too broad. Generally speaking, the health level of boiler equipment is the first element, which is fundamental to ensuring safe and continuous operation. The equipment should be regularly overhauled and maintained, and the problems found temporarily should also be dealt with, minor repairs and temporary repairs are indispensable, and some key parts such as the wear and tear of the heating surface should be checked every time the furnace is stopped.

It is also necessary to arrange a reasonable overhaul according to the equipment situation, and it should be done at least once in 3 or 4 years. Secondly, the operation aspect is also very important, and improving the operation level of the overall operation personnel is also the key to ensuring safe and continuous operation. Reasonable adjustment, standardized operation and continuous technical training are necessary.

And then the company's management level is also closely related to it, imagine how to do a good job in production of an enterprise that can't retain the technical backbone? The technology of the power plant is the main thing, and the management should also want to cooperate with it, which should be strict and humane, so that the workers can do a good job with peace of mind, and the enterprise attaches importance to technology and talents, so as to improve the combat effectiveness of the entire enterprise, so that the enterprise can get normal and continuous development.

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1. To ensure the normal operation of fuel, many boilers are shut down because of fuel.

2. Closely monitor the parameters in the operation of the boiler body (such as bed hotbed pressure, steam temperature pressure, exhaust gas temperature parameters, etc.), adjust it in time when there is a deviation, and operate in strict accordance with the operation procedures.

3. Closely monitor the operation status of each auxiliary machinery, such as induced draft fan, return fan, feed pump, dust collector, cold slag device, etc. Eliminate defects in auxiliary equipment in the bud.

1. Choose a good fluidized bed boiler.

2. Select the construction team according to the team.

3. Improve the operation skills of stokers.

The wear problem of circulating fluidized bed boiler was a worldwide problem a few years ago, but with a large number of experiments and practices of scientific researchers, the current circulating fluidized bed boiler has made great progress in controlling wear, and the existing control means are: 1. Work the structure of the boiler, such as transforming the slope sliding surface of the previous boiler Weiran belt into a desktop type to reduce wear.

2. You can bring the upper part of the boiler to the water wall tube for anti-wear spraying, and if necessary, you can also carry out anti-wear spraying on the water wall around the outlet of the boiler furnace.

3. The patented technology of Xi'an Thermal Power Institute can be used to install a wear-proof wall on the water wall of the boiler furnace to control the wear of the boiler (according to the different coal quality, there may be a high bed temperature, high exhaust gas temperature, and it is not easy to carry load, but if the coal quality at the low calorific value is burned, this situation will generally not occur); The load of the boiler is generally determined according to the specific situation of the boiler, such as the coal quality of the boiler burning, the particle size of the coal burned by the boiler, the resistance of the air distribution plate of the boiler design, the structure of the boiler returner, the return of the boiler, the ratio of wind and coal of the boiler and other factors, which should be solved according to the specific situation of the boiler, not a few simple words.

The bed temperature can be increased by taking the following measures during the normal operation of the circulating fluidized bed boiler:

1) Appropriately reduce the primary air volume of the furnace and increase the coal feed.

2) Appropriately reduce the amount of limestone feeding.

3) Always check the coal feeding situation of the coal feeder, and observe whether the flame and return device are normal.

4) The bed material level can be appropriately reduced.

5) Adjust the amount of material returned by the return device to prevent a large amount of circulating ash from returning to the furnace.

The main measures to reduce the bed temperature are:

1) Appropriately increase the volume of primary fluidized air, so that the heat storage in the bed is raised from the dense phase area to the dilute phase area by the primary wind, so as to reduce the bed temperature, and at the same time, the amount of coal feed can also be reduced, so that the heat source in the bed can be reduced, and the purpose of reducing the bed temperature can also be achieved.

2) Increase the amount of limestone feed appropriately. Since the limestone powder enters the bed, it must first absorb heat before the chemical reaction can begin, and the temperature of the bed material will drop.

3) During the ignition process, strictly control the amount of coal entering the furnace not to exceed 20% of the rated coal feeding amount, so as to prevent the heat release of coal from exceeding the total heat absorption of the boiler and making the bed temperature too high.

4) Strictly follow the principle of "adding air first and then adding coal when the load is raised, and reducing coal first and then reducing the wind when the load is reduced". The purpose of this is mainly to prevent the coal from not being fully burned after entering the bed, and when the air volume is sufficient, it will suddenly burn violently, and a large amount of heat release will make the bed temperature rise rapidly.

5) When the operator adjusts the combustion, he should make a small number of adjustments to avoid large fluctuations in bed temperature.

6) The operator should always check the coal feeding situation of the coal feeder, and observe whether the flame condition and the return device are normal.

7) When putting slag, according to the differential pressure of the bed, it should be less and more diligent, so that the thickness of the bed is always kept within a reasonable range. After the slag discharge is completed, the operation personnel should carefully check and confirm that the slag discharge door is closed tightly before leaving the site, so as to avoid the situation that a large number of bed materials are discharged artesianly due to the slag discharge door not being closed tightly, the bed thickness is too low, and the bed temperature is difficult to control.