What Is a Steam Boiler?

WNS steam boiler refers to a full-automatic fuel (gas) steam boiler, which uses a horizontal internal combustion full wet back, high-efficiency threaded smoke tube, and is equipped with a perfect thermal insulation outsourcing design. The boiler thermal efficiency is over 85%. The product design is novel and the structure is reasonable. The process performance is good, which makes this product have extraordinary outstanding quality.

wns steam boiler

WNS steam boiler refers to fully automatic fuel (gas)

WNS Series Horizontal Internal Combustion Three-Return Full Wet Back

1.Advanced

wns steam boiler inspection before ignition

1. Check the operation and / or handover records. 2. Inspect and inspect the inside and outside of the boiler. 3. Check the main safety accessories. Safety valves, water gauges, and pressure gauges must be tight, reliable, and sensitive. 4. Check the water treatment equipment. 5, check the water supply equipment and soda water pipes. Each valve is adjusted according to the requirements of starting. 6. Check the oil supply equipment. After the above inspections are qualified, the boiler can be started.

wns steam boiler start boiler

1. Observe the water level in the water level meter. If the water level rises or falls, you should check whether the opening and closing positions of the water supply valve and the sewage valve are correct or leaking. 2. When the pressure rises to 1 kgf (cm2), the water level gauge should be flushed. The order of flushing the water level meter: Open the soda cock and flush the soda tube; Close the water cock and flush the soda tube; Open the water cock and flush the soda tube; Close the steam cock and flush the water pipe; Open the steam cock , Flush the soda water connection; close the soda cock, so that the water level returns to normal. If the water level rises rapidly and there is a slight fluctuation, it indicates that the water level is normal; if the water level rises slowly, it indicates that the water level meter is clogged, and it should be flushed and inspected again. 3. When the pressure rises to 2 kgf (cm2) gauge pressure, flush the pressure gauge water trap. 4. When the pressure rises to 3 kgf (cm2), check whether there are any leaks at the joints of the pressured parts, and tighten the loosened screws again. In order to prevent the screw from being broken, do not use excessive force and do not allow the handle to be tightened by lengthening the handle. 5. When the pressure rises to 4 kgf (cm2) gauge pressure, conduct a blowdown to balance the temperature of the boiler water in each part. Advanced water to high water level before sewage discharge, pay attention to observe the situation around the sewage pipe when sewage is discharged, and observe the water level at any time, close the sewage valve after sewage discharge, and check for water leakage. 6. When the pressure rises to 2/3 of the working pressure, warm the pipe (the purpose of the warm pipe: make the steam pipes, valves, flanges, etc. be uniformly and slowly heated and release the condensate in the pipe to prevent the pipe from generating Leakage due to water hammer, etc. Warming time is about half an hour) Operation: Open the trap on the pipe to remove all condensate. Slowly open the main steam valve half a turn, and fully open it after the pipeline is fully warmed up. If the pipeline is vibrated or hit by water, immediately close the main steam valve and strengthen the water drainage. After the vibration is eliminated, slowly open the main steam valve to continue warming the pipe. Slowly open the steam inlet valve of the sub-cylinder to make the steam pressure of the pipeline equal to the steam pressure of the sub-cylinder. At the same time, pay attention to exclude condensate. Until the dry steam is exhausted, close all traps and fully open the main steam valve. After each steam valve is fully opened, it should be turned half a turn to prevent the steam valve from getting stuck due to thermal expansion. 7. When the steam pressure rises to the working pressure, steam can be supplied directly.

wns steam boiler boiler operation

During normal operation of the boiler, the steam pressure, water level, oil level, and drainage must be adjusted at any time (the purpose of drainage: to eliminate the suspended foam on the surface of the furnace water. Reduce the salt and alkali content of the boiler water, prevent the co-transpiration of steam and water, and ensure steam Quality; discharge the sludge and dirt accumulated on the bottom of the drum and the lower header). 1. The boiler should achieve balanced water supply during operation and keep the water level in the normal range as much as possible. 2. When the load is large, false water levels may occur. For example, when the load suddenly rises, the water level may first rise and then fall, and when the load suddenly falls, the first fall and then rise. Therefore, when monitoring and adjusting the water level, pay attention to judging this temporary false water level to avoid misoperation. 3. Install two blowdown valves in series on the drain pipe at the bottom of the drum and the lower header. One near the boiler and the header is a slow-open valve, and the other is a quick-open valve. When draining, the slow-open valve should be opened first. After that, open the valve slightly, and then fully open the valve after preheating. In order to make the drainage effect better, the quick-open valve can be opened and closed several times. After the blowdown is completed, close the quick-open valve first, then close the slow-open valve, and then open the quick-open valve again to drain the water between the two valves. Precautions for sewage discharge: Adjust the boiler water to a level higher than the normal level before sewage discharge. Strictly monitor the water level during sewage discharge to prevent boiler water shortage caused by sewage discharge. After a period of time after draining, touch the drain pipe behind the drain valve to check whether the drain valve is leaking. If it feels hot, it indicates that the drain valve is leaking. You should find out the cause and eliminate it. In accordance with the principle of draining regularly, less, and evenly, discharge sewage at least once per shift. All sewage pipes must be drained in turn to prevent deterioration of boiler water quality and blockage of sewage pipes, and even cause water cycle damage and pipe explosion accidents. . Sewage discharge should be carried out under low load and normal working pressure. At this time, the boiling water of the pot is relaxed, slag pollution is easy to settle, and the drainage effect is good. The sewage discharge operation should be switched on and off several times, and the slag is stirred up by the counter-impact force, and then concentratedly discharged, so the sewage discharge effect is good.

wns steam boiler close boiler

Stop the furnace normally. Before the furnace is completely stopped, the water level should be kept high to prevent water shortage caused by the water level falling during cooling. Emergency shutdown. Emergency shutdown is an emergency treatment measure to prevent the accident from expanding when a boiler accident occurs. When the boiler is in operation, it should be stopped immediately when one of the following conditions occurs: The boiler water level is lower than the visible edge of the lower part of the water level meter, and the water supply is continuously increased and other measures are taken, but the water level continues to fall; The boiler water level exceeds the maximum Visible water level (full water), the water level can not be seen even after the water is discharged; the feed pump fails or the water supply system fails, and water cannot be fed to the boiler; the water level gauge or the safety valve is completely ineffective; Other abnormal conditions endanger the safe operation of the boiler. In case of power outages, water outages and other emergencies, measures should be taken in a timely manner. If it cannot be resolved, it should be reported to the company in a timely manner. It is strictly forbidden to repair boiler pressure components under pressure or high boiler water temperature to prevent steam and water from being sprayed and injured.

wns steam boiler repair boiler

Warning signs should be placed on the equipment being repaired. Maintenance of electrical equipment should be performed by electrical staff. When inspecting the flanges of steam and water pipes and their joints, safety valves, manholes and inspection holes, they should not be viewed from the front but from the side. Wear protective gloves during operation to prevent burns. The operator should regularly perform automatic (at least once every 3 months) and manual exhaust (at least once a week) to check and ensure that the safety valve is sensitive and reliable.