Nanjing 12 tons coal-fired hot water boiler

Nanjing 12-ton coal-fired hot water boiler scheme zozen boiler
1. Before the inspection, make the boiler shut down safely, thoroughly remove the internal scale, external soot, and soot. If necessary, the outer shell and moisture-proof material of the furnace wall must be removed. The inspection points are as follows:
(1) Whether the pressure component is normal and whether there is leakage.
⑵. Is there any corrosion, groove deformation, etc. inside and outside the boiler steel plate?
(3) Whether the fire tube is bent or not, and whether there is any crack at the welding end of the tube end and the tube sheet.
⑷. Whether the water-cooled wall pipe is bent, deformed, corroded, expanded, etc.
⑸. Is there any corrosion on the connection between the water supply pipe, the drain pipe and the boiler drum?

1. Water supply requirements: see “Water Quality Management” for details.
2. Water level in the pot: Always pay attention to changes in the water level in the pot to keep the water level within the range of the normal water level, not to be higher or lower than the minimum water level. The water level in the water level table generally has slight shaking phenomenon, such as the water surface is still, There may be a blockage in the water level gauge, which should be flushed immediately.
3. Water level gauge: The deviation between the water level gauge and the normal level of the boiler drum is ±2mm. The markings of safe water level, minimum safe water level and normal water level shall be accurately marked.

In order to promote the clean heating of coal-fired thermal power and new energy heating, the city expanded a total of 6 cogeneration power plants to supply heat to the city, and this year’s heating season achieved a total of 37.82 million square meters of heating. Vigorously develop new energy heating modes such as dry-heat rock heating and sewage source heat pump heating. The city has no interference with geothermal (dry heat rock), sewage source heat pump and other new energy heating. The total area of ​​heating projects has been implemented is about 15 million square meters. Successfully selected as a national pilot city of clean heating, and won 300 million yuan of central financial support for the city every year.
At present, the city’s gas storage peak shaving capacity has reached 31.2 million cubic meters. After the completion of the 126 million cubic meter liquefied natural gas (LNG) emergency reserve peak shaving project invested by Shaanxi LNG Reserve Transportation Company, the city’s emergency peak shaving capacity will be significantly improved. Far beyond the requirements of China and the province. The Municipal Development and Reform Commission clearly targets the gas shortage for people’s livelihood.
3. If the corrosion is serious, the strength calculation should be done before the hydraulic test.

4. Hydraulic test steps: (1) The hydraulic test should be carried out when the surrounding air temperature is higher than 5℃, and when it is lower than 5℃, anti-freezing measures must be taken. Before the water pressure test, the inlet water temperature is kept at about 20℃-30℃. If the temperature is too low, the dew on the outer wall of the boiler may easily be confused with the incomplete conditions such as water seepage, which increases the difficulty of inspection. Uniform expansion, and the surface temperature is too high, can make the water droplets evaporate, so that the leakage is not easy to find.
After the blowdown is completed, the blowdown valve should be closed and checked for tightness. The inspection method is: after the sewage valve is closed for a period of time, try to test whether it is cooled by hand on the pipeline leaving the first sewage valve. If there is no cooling, the sewage valve must be leaking, if the sewage valve is blocked by dirt, etc., Don’t use tools to knock, but stop the furnace for maintenance.

9. Clean the boiler room
⑴. The boiler room should be kept clean and tidy, and no other debris should be stacked in the boiler room.
⑵. Pay attention to indoor lighting, water level gauge, and pressure gauge so that the furnace worker can clearly observe, often patrol around the boiler, and check whether the boiler and auxiliary parts are normal.
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15 tons electric heating hot water boiler
c) When there is doubt about the condition of the equipment according to the boiler operation;
3) Maintenance of the boiler

A. The feed water of the boiler must be strictly treated, which is an important issue to extend the life of the boiler and ensure the safety of operation. The quality of the softening treatment of the feed water should be implemented in accordance with B/T1576-2008 “Industrial Boiler Water Quality”.

B. The temperature of the feed water should be as close as possible to the temperature of the furnace body, and its temperature should be above 20℃;

C. It is very important to ensure the normal operation of water level control. Water shortage is one of the main causes of accidents and damage to the boiler. The low water level cut-off device must be regularly inspected and maintained. The flushing water level meter should not be lower than the bottom safe water level. If it is not cleaned once, it can be washed multiple times. But it must be flushed at the water level. The procedure for flushing the water level gauge has been detailed previously.

2. Before the inspection, make the boiler shut down safely to completely remove the internal scale, the external soot and soot. If necessary, the outer shell of the furnace wall and the moisturizing material must be removed. The inspection points are as follows:
(1) Whether the pressure component is normal and whether there is leakage.
⑵. Is there any corrosion, groove deformation, etc. inside and outside the boiler steel plate?
(3) Whether the fire tube is bent or not, and whether there is any crack at the welding end of the tube end and the tube sheet.
⑷. Whether the water-cooled wall pipe is bent, deformed, corroded, expanded, etc.
⑸. Is there any corrosion on the connection between the water supply pipe, the drain pipe and the boiler drum?