What to do if the coal used in the boiler is of poor quality? Let’s discuss
Thread Content
A very funny thing I found on another website, let's discuss it together: At 8 o'clock in the morning, the director inspected and found that the 75-ton circulating fluidized bed #1 furnace had a 50-ton load. The director asked: “Why carry such a small load? :o" replied the stoker: “The quality of the coal is not good, so we can't bring it with us. :("said the director: “If coal is bad, you won’t think of a solution! :Q "The stoker cried:'(. Please discuss how we can bring the load up when the coal is not good? :victory: This post was last edited by ssbayf on 2007-12-24 23:15 ]
This is indeed a common phenomenon, and it also occurs in our factory! The main measures include the following: 1. Solve it from the source, that is, choose a good supply coal mine ； If there are market reasons, you can compare several companies and make a decision after comprehensively considering various economics. 2. Control the quality inspection of coal entering the factory. If there is no inspection and analysis, there will be no data to explain, let alone the requirements for use. 3. You can also purchase some high-quality coal to adjust the average quality of coal to ensure the purpose of use.
(1) Pre-selection (2) Coal blending
When blending coal, the main thing is to feed good coal
It is best to let the purchasing staff burn the boiler for three days
1. It would be good if you can buy coal now. Otherwise, let Shanxi Jincheng Minerals Bureau acquire the best. Now it has acquired a number of medium-nitrogen companies. Leaders can consider it.； 2. Secondly, only technicians follow the attendants to explore the process on site. Do you want them to have free time, haha
It’s the first day today, so I’ve posted a lot of replies, so I won’t go into detail here today, just a few suggestions: First of all, please post the test sheet for the type of coal you are using. If you are burning coal gangue, there is nothing you can do? What coal is your boiler designed to use? What kind of coal are you using now? If the difference is not too big, you can use the skill of the stove to solve it... The last word is to find out what kind of furnace and what type of coal is used to solve the problem in detail. This discussion is not interesting.
Coal blending must be reasonable, and you cannot burn any coal randomly. If the coal quality is poor, it cannot be dealt with immediately. There must be a period. During this period, attention must be paid to the operation of the boiler. Be sure to prevent flameout and contact the raw material department to re-mix the coal.
Now the price of coal has increased, and coal is still in short supply. When we buy coal, we often give you some low-quality coal. There is nothing you can do if you don't want it. If you don't want the bad ones, we won't give you the good ones. So you have to pay more attention when using coal. We are mixing coal. At the same time, the source is also being tightened. The entrance to the factory must be inspected. We would rather pay more for coal than buy low-quality coal.
First, check the source of procurement, and secondly, do a good job in inspecting coal quality.
We also use a 75-ton circulating fluidized bed boiler. We have had poor boilers before. It is no problem to add a full load. Yours cannot be used to add a load. I think: 1. The instrument display may be wrong and the actual amount of coal added is not enough. It is best to contact the instrument personnel to adjust the coal flow meter. 2. It may be that the water-cooled wall is coked. Stop and inspect for further treatment. 3. If it still doesn’t work, the most likely reason is that the heating area of your boiler is not enough. Find the manufacturer to solve the problem.
Our factory has also had: I suggest 1. Start from the source of coal, focus on the quality of coal screening, and carry out the work in accordance with the internal and external quality requirements of the boiler institute. 2. Based on the overall stability of the furnace conditions, moderate air volume should be used to reduce the residual carbon content of the slag. 3. It is necessary to start with the careful operation of the personnel and avoid causing knots and dead furnaces. 4. Choose the appropriate amount of slag foam.
If the coal quality is not good, the only way to increase the load is to rely on operation. Increase the primary air, increase the secondary air, open the induced air to maintain negative pressure, and increase the coal supply. Of course, this cannot solve the fundamental problem. It can be done for a short time, but it will cause damage to the equipment over time.