How do you prevent your boiler from scorching? What are the hazards of boiler coking and how to prev

Causes of boiler coking: 1. Coking is related to ash melting point. If the installation angle of the burner is skewed, the burner itself is defective, the burner is too large, and the pulverized coal gas flow is deflected and rubbed against the wall, which will often lead to serious coking of the boiler.

3. Coking is related to combustion adjustment. Unreasonable combustion adjustment, too low primary air pressure, too low wind speed, too fine pulverized coal, early ignition, too large secondary wind speed, uneven distribution of air volume at all corners, uneven powder volume of the four corners of the burner, etc., will cause the pulverized coal air flow to wipe the wall and coke. 4. Coking is related to air leakage of boiler equipment.

The leakage of the furnace and the pulverizing system increase the air volume entering the furnace, reduce the temperature level of the combustion chamber, and delay the combustion process. The air leakage at the cold ash hopper will raise the center of the flame and elongate the flame, resulting in an increase in the flue gas temperature at the outlet of the furnace, which is easy to cause coking over the screen. The air leakage of the air preheater not only increases the power consumption of the induced draft fan, but also part of the air supply volume enters the flue, which is easy to cause a lack of air in the furnace.

2. Choose a reasonable furnace outlet temperature. Through the monitoring of various operating parameters such as flue gas temperature, superheated steam temperature, boiler load, combustion oxygen, furnace exhaust gas temperature, etc., it is also possible to evaluate whether coking will occur at the outlet of the boiler furnace, so as to prevent coking in the boiler furnace when burning different types of coal, and to obtain the maximum boiler efficiency. 3. Apply various operating measures to control the temperature level in the furnace.

Increase the excess air coefficient in operation, increase the uniformity of air distribution, prevent local heat load from being too high and produce local reducing atmosphere, adjust the uniformity of air powder distribution at the four corners, prevent the primary air flow from directly washing the wall, and take load reduction operation if necessary. 4. The concentration of pulverized coal in the four corners and the air distribution of each burner should be as uniform as possible. Extended data coking will cause great harm to boiler operation and safety, which is mainly reflected in the following aspects:

1) After the large coke block of the boiler falls, a large amount of water vapor is generated instantly, which causes a large amount of cold air to leak into the bottom of the furnace, resulting in a serious deterioration of the ignition of the pulverized coal flame in the burner area (especially in the lower burner area), and causing the boiler to extinguish the fire due to the violent fluctuation (overrun) of the negative pressure of the furnace; When the coking is melted into large pieces, it is caused by gravity from above. As a result, the water wall of the cold ash hopper will be smashed, resulting in load reduction or even furnace shutdown; (2) When the water wall is all coking, only the furnace can be stopped for manual decoking; (3) The coking of the furnace causes the superheated steam temperature to rise, and leads to the overheated steam temperature, reheated steam temperature and desuperheating water, and even incurs the bursting of the steam pipe; Coking will reduce the output of the boiler, and in severe cases, it will cause forced shutdown: (4) Coking will shorten the service life of the boiler; The exhaust smoke loss increases, and the boiler efficiency decreases; (5) The power consumption of the induced draft fan increases.

Prevent boiler injectors from burning out

1. Check and check the angle of each injector during major and minor repairs, and do an aerodynamic field test to ensure that the angle of each injector is correct.

2. Ensure that the three air cooling dampers are interlocked after the powder discharger is stopped, and ensure the good cooling of the three air injectors.

3. Thermal engineering ensures that the primary wind pressure gauge, secondary wind pressure gauge and primary wind speed indication are correct and reliable. Check the speed of the powder feeder once a month, and contact the thermal engineer to purge and calibrate the air pressure gauge tube once a month.

4. Strengthen the coking work of the nozzle, except for the specified middle shift, the rest of the time is carried out as needed.

1) The main hazards of boiler coking are: causing high steam temperature; disruption of the water cycle; Increased smoke exhaust loss; Reduce boiler output.

2) In order to prevent the coke of the car, the combustion should be reasonably adjusted in operation, so that the flame in the furnace is evenly distributed and the center of the flame is kept in an appropriate position; Eggplant ensures proper coverage of excess air to prevent anoxic combustion; When dirt and coking are found, they should be removed in time; Avoid running beyond force; improve the quality of maintenance; Ensure that the burner is installed correctly; The tightness of the boiler should be good, and the unreasonable place of the boiler equipment should be improved in time.

For the blackened burnt at the bottom of the pot, we can use pine perfume and toothpaste powder, and wipe the bottom of the pot with a toothbrush or vegetable cloth without hurting the pot. You can also use vinegar or tea to boil the potatoes for a while and then brush the pot to clean up.

If the pot is burned after dry boiling, it will turn black, very ugly, don't worry, let's sprinkle some flour in it first, then pour in white vinegar, pour in the amount of white vinegar pure hole, be sure not to have a paste position, ** burn for a while, let the water boil, and then let it stand.

It was soaked in our pot for 15 minutes, and after 15 minutes some of the stubborn black stains in the pot were almost soaked. Now let's move on to the next step, we prepare a scouring pad, use his rough side to start brushing, the flour just added has a strong adsorption manual, white vinegar contains acetic acid, acetic acid can soften stains, stains can be easily removed.

After that, we washed it with clean water, and the treated iron pot became very clean, and there were no traces of burnt paste in it, just like a newly bought pot.

If the pot is particularly dirty after burning for too long, we can use fragrant ash. The method is to use a dry rag dipped in some fragrant ash and rub it on the pan, so that the burnt marks can be easily removed and the shine is as good as new. Of course, this situation requires wearing gloves and being patient.

Tools Raw Materials:Tea leaves or white vinegar. 1. Pour in half a bowl of white vinegar or tea leaves, add water and boil, and let it stand for five minutes after about three or four minutes, as shown in the figure below

2. After five minutes, the focal place falls off, as shown in the figure below

3. The scorched place can be lifted, as shown in the figure below

4. Pour it out, as shown in the figure below

5. Then clean it as usual, and the pot will be as bright as new, as shown in the figure below

1.Choose a reasonable amount of oxygen for operation.

2.Select a reasonable furnace outlet temperature to optimize the combustion adjustment test of the boiler, and discharge smoke from the furnace.

The amount of oxygen is operated to ensure that the main parameters are qualified and the flue gas temperature of the furnace outlet is lower than the melting point of coal ash to ensure the vapor quality.

amount, thus preventing coking at the furnace outlet.

3 .Ensure a good mixture of air and fuel, avoid the formation of a reducing atmosphere near the water wall, and prevent.

Stop local serious ash accumulation and coking.

4.Various operating measures are applied to control the temperature in the furnace to be stable.

In order to solve the problem of coking in the boiler of the power plant, FM coal-fired additives can be used, which not only solves the coking problem, but also saves coal, reduces the exhaust gas temperature, and reduces the carbon content of the ash. It increases the efficiency of the boiler, reduces coal consumption and saves costs. It is a good product for energy saving, emission reduction and increasing coal source.

Removing the cost of FM additives will also bring considerable economic benefits to the enterprise. Contact: Mr. Wang.

The bottom of the charred pot skillfully removes the black spots Burnt stainless steel pots, rice cookers or aluminum pots, it is difficult to remove the black spots, and you can't scrape them with a knife, 1, Put a few slices of apples in the pot and add water, and then put it on the fire to burn for a while, and the black spots will be removed immediately. 2. Use incense ash (mosquito coil, sandalwood), first dip the bottom of the pot with a little water, then sprinkle the dry incense ash evenly on the bottom of the pot, and then rub it slowly with a steel wool ball, the effect is very good. Note:

If it is the usual accumulation of incense ash, it must be kept dry, and this method can also deal with the traces of the bottom of the enamel pot and clay pot, which is very effective. 3. You can also use charcoal that has been burned and drenched to scrub, and the effect is also very good. 4. Put a few slices of lemon peel or orange peel in a pot, add water to boil, soak for a while, the black spots will float up and be removed after washing.

It is easy to clean, do not use a steel wool brush, it will damage the pot, if it is an aluminum pot brushed and then used to cook rice is very bad for the body. (If you must brush, you can use a coarse cloth instead of a steel wool ball).

2. The red in the mountains can be used to paste the bottom of the pot.

If the bottom of the pot is battered for cooking rice and stir-frying, you can put a few mountain red in the pot, add a little cold water and boil (do not boil dry), and the bottom of the pot will be removed soon.

3. Remove the tomatoes from the bottom of the pot.

A few not very good tomatoes are boiled in a pot and will naturally fall.

4. Remove the bottom of the pot from the beer and liquor.

If you accidentally paste the pot while cooking, there is a pot at the bottom of the pot, if it is not easy to brush off, you can pour a little liquor and beer and a small amount of water (the ratio is 1:1: mix, the lid is placed for 5 minutes and it is easy to scrub clean.

5. Peel the apple or pear peel to paste the bottom of the pot.

Boiled with apple or pear peel with a little water, and then it will be easy to clean.

6. Remove the oranges from the bottom of the pot.

Cut a few slices of oranges and boil them in a pot, let them simmer overnight, and the next day the paste will turn over and it will be easy to remove.

7. Waste ** card, magnetic card wash and paste pot.

Problem description: The used ** card, shopping card, discount card, VIP card is accumulating more and more, although there are people who love to collect this kind of thing, but most people do not have this Yaxing, so, or use it to do something practical. It is inevitable to paste the pot when cooking, and if you use a hard shovel to clean the scorched scale, it will cause scratches, and if you use a wooden spatula, it is difficult to completely remove the scorched scale.

Why not let those old cards reflect the use value again?

Operation: Use a card along the edge of the pot to gradually scrape off the charred scale. Note that you don't need to use too much force when scraping. If the card is made of rigid plastic, it can also be used to scrape dirt on the gas stove.

8. Vinegar removal.

Add a little vinegar, heat the water and boil it, and it will be washed off.

9. Rice fermentation removal.

There is a trick that is easy not to pass on. In summer, pour a little rice into the pot and let it ferment naturally. After 2 days, after smelling the sourness, the hands are dusted.

10. Remove with salt.

Dry cook over low heat for a while, sprinkle salt when smoking, shake for a minute, turn off the heat, and then wipe again, you can remove it very cleanly, leaving no bottom and no mushy smell.

11. Remove the cleaning ball with washing powder.

Use a cleaning ball and laundry detergent to directly wipe off the blackened part of the bottom of the pot.

12. Wipe off the toothpaste.

Apply toothpaste, use a cloth to rub some water, and rub vigorously, which is economical and does not hurt the pot, but it may take a little effort to wipe.

13. High concentration sodium hydroxide aqueous solution.

Soak it in a high-concentration sodium hydroxide aqueous solution (such as 100 grams of water and 50 grams of sodium hydroxide, because it is a strong corrosion, you must wear acid and alkali resistant gloves, and cannot be used for aluminum cleaning), and then scratch with a steel wool ball.

If you can find "sodium percarbonate or sodium perborate", you can pour boiling water directly, then add boron or carbon, soak until the water temperature and then pour it out.

The former is to remove the burnt grease, and the latter is to remove the yellowed color.

14. Remove the scorch from the pan.

Add water to the pot and bring to a boil, add a small amount of dish soap, leave it overnight, and then scrub it to remove.

The question is that I put it for a day, and I didn't wash it with white vinegar today.

Teach you 3 tricks to quickly clean the bottom of the paste pot in one minute!

Generally, it will be better to wash it with a boiler when it is burned, and when the pot is hot, you pour the water, and the effect is obvious.

The four best ways to clean a scorch pan:

Cleaning method 1 of the burnt pot: wipe with rosin perfume and toothpaste powder.

The blackened burnt scale at the bottom of the pot can be wiped with rosin perfume and toothpaste powder, and wiped with a toothbrush or vegetable melon cloth, which has a good effect.

Burnt pot cleaning method 2: Cook with vinegar.

What should I do if there is burnt food in the pan that cannot be washed off and is difficult to scrape?

Solution: At this time, just pour one-third of any kind of vinegar into the pot, add two-thirds of the proportion of water, cover and boil for five minutes, soak overnight, and gently scrape with a spoon to remove the blackened bottom.

Burnt pot cleaning method 3: boil with tea leaves.

Solution: After adding water, put some tea leaves and boil together for three minutes, turn off the heat and leave for 2 minutes, and use a pot brush to brush the inside of the pot.

Cleaning method 4 of the burnt pot: brush the bottom of the pot with fragrant ash.

Dip a little water on the bottom of the pot first, then sprinkle the dry incense ash evenly on the bottom of the pot, and then slowly brush it with a steel wool ball, the effect is very good. If you don't want to damage the bottom of the pot, you can use a regular dishcloth.

The bottom of the pot is burned, teach you a trick to let the burnt stains fall off quickly in minutes, pour water into the pot and put in tea leaves and white vinegar, and then heat it, keep it boiling for 3 to 4 minutes, stir it with a spoon after standing, and the charred black will fall off in large pieces, then wipe it, and finally wash it twice with water.

1. Use white vinegar and tea leaves. Pour half a bowl of white vinegar (or some tea leaves) into a charred pot, add water and boil for about three or four minutes.

2. After boiling, you can let the pot stand for about five minutes, or you can wait for the water to cool a little longer, at this time, you will find that the burnt part falls off from the pot, and finally it is good to simply clean it.

Pots and pans are essential tools in the kitchen, we often spend a lot of time choosing pots and pans that are suitable for good looks, but after use, we will find that many pots are easy to burn, or black after a few uses, how can they not be cleaned, what should I do?

No matter what material the pot is, if there are burnt marks on the surface of the pot, you should soak it in water immediately to soften the burnt ingredients on the surface, and then brush it; If it is an aged scorch mark on the bottom of the pan, you can use baking soda or white vinegar to help remove the scorch marks.

Method 1 to remove scorched pots

Take the kraft paper and cut it into an appropriate size, and then let the kraft paper dip it in white vinegar, brush the burnt part of the bottom of the pot with the vinegar-soaked kraft paper until it is clean, and then wash it with water.

Method 2 for removing scorched pots

Pour a little more water into the pan and add 1 tbsp of baking soda. Bring the water to a boil over low heat, mix the baking soda and cook for 1-2 minutes, turn off the heat and let it stand overnight, then scrub it off with a brush or sponge.

Tip: This method is also suitable for cases where there are burn marks on the surface of the pot and there are still marks after soaking in water. Baking soda and water until slightly thick and over the burnt. If it is non-sticky, scrub it with a soft sponge.

If the pot is not wiped dry immediately after cleaning, it is easy to rust spots after a long time, and water stains will appear, and it is not easy to remove after a long time, you can use natural materials to help remove water stains on the pot.

Method 1 to remove water stains from pots and pans:

Cut the lemon in half and squeeze out the juice and pour the lemon juice into the pan where there is a water stain. Use a brush or sponge to scrub the pot directly, and finally wash it with water and then wipe it dry.

Method 2 to remove water stains from pots:

Wash and peel the potatoes, put the skins in a pot filled with water, bring the water to a boil over medium heat, and turn off the heat. When the water is still lukewarm, then use a brush or vegetable cloth to scrub the pot.

After using the pot for a long time, rust spots will occur due to oxidation, and the following natural ways can be used to help remove rust spots.

Method 1 for cleaning pot rust spots

Take the onion, cut it, take a piece of the onion and let the cut surface be covered with salt. Then use the salted onion to wipe the rust spots on the surface of the pot back and forth until the rust spots are removed, and finally rinse with water.

Method 2 for cleaning rust spots in pots:

Once the potatoes have been washed off the surface dirt, dry them and cut them. Take the cut potatoes and let the cut surface be covered with salt, then wipe the rust spots on the surface of the pot back and forth until the rust spots are removed, and finally rinse them with water.