• SZL Membrane Water Wall Coal-fired Steam Chain Grate Boiler System 1
  • SZL Membrane Water Wall Coal-fired Steam Chain Grate Boiler System 2
  • SZL Membrane Water Wall Coal-fired Steam Chain Grate Boiler System 3
  • SZL Membrane Water Wall Coal-fired Steam Chain Grate Boiler System 4
SZL Membrane Water Wall Coal-fired Steam Chain Grate Boiler

SZL Membrane Water Wall Coal-fired Steam Chain Grate Boiler

Supplier:
Nantong Wanda Power Co., LTD.
Ref Price:
get latest price
Loading Port:
China main port
Payment Terms:
TT OR LC
Min Order Qty:
1 set
Supply Capability:
10 set/month

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Rated capacity: 15~30t/h

Rated work pressure1.25~2.45Mpa

Adaptive fuelⅡ.Ⅲ Bituminous coal

Application industry : industrial and mining enterprises, schools, hospitals, etc.

Main Technical Parameters of Assembled Membrace Wall Type Boiler

Boiler Type

Rated Capacity

(t/h)

Rated Work Pressure

(MPa)

Rated Steam Pressure

(℃)

Feed Water   Temperature

(℃)

Thermal Efficiency   (%)

Max.Transport Weight

(t)

Max. Transportation   Size

L×W×H(m)

SZL15-1.25-AII

15

1.25

193

60

80

29

8.77×3.43×3.68

SZL15-1.6-AII

15

1.6

204

60

80

29

8.77×3.43×3.68

SZL15-2.5-AII

15

2.5

226

60

80

29

8.77×3.43×3.68

SZL20-1.25-AII

20

1.25

193

60

82

29

9.38×3.4×3.55

SZL20-1.6-AII

20

1.6

204

60

82

30

9.38×3.4×3.55

SZL20-2.5-AII

20

2.5

226

60

80.2

30

9.38×3.4×3.55

SZL20-2.5/400-AII

20

2.5

400(overheat)

105

80.2

30

12.04×3.56×3.69

SZL25-1.25-AII

25

1.25

193

60

81.3

25

13×3.6×3.7

SZL30-1.6-AII

30

1.6

204

60

81.2

30

13.5×3.9×3.7

1.    Structure introduction :

The boiler is a double-drum longitudinal natural circulation assembled water-tube boiler. The combustion equipment adopts light chain grate and equipped with stepless speed transmission device. The front, rear and two sides of the water-cooled wall are arranged in the furnace, and the water-cooled wall on both sides adopts the membrane wall structure. The front and rear water-cooled wall hanging special-shaped refractory bricks form a high and short front arch and a low and long rear arch above the grate, covering about 75 % of the length of the grate. The convection tube bundle is composed of boiler steel tubes, and the flue gas is folded into three return strokes with a partition wall. A cast iron economizer and a horizontal steel tube air preheater are arranged at the tail.

The blower blows cold air into the air preheater from the left side of the boiler, and enters the hot air ducts on both sides of the boiler after heat exchange. It rises to the furnace through nine independent grate air chambers. Each air inlet pipe is provided with an adjustment door, which makes the air distribution adjustment on the grate simple. The coal hopper is arranged in front of the combustion equipment, and the coal gate adopts a water-cooled cast steel serrated shape, which effectively increases the surface area of the coal seam and is conducive to the full combustion of coal.

The fuel enters the furnace through the coal hopper device and burns. The high-temperature flue gas absorbed by the water-cooled wall of the furnace enters the cooling chamber and convection tube bundle. After heat exchange, the furnace body is discharged into the cast iron economizer and tubular air preheater, and then through the dust collector. Finally, the induced draft fan is drawn from the chimney to the atmosphere.

2.Product features :

The membrane water-cooled wall boiler is one of the characteristic products of our factory. Because this type of boiler adopts a variety of new technologies and new structures, it has the characteristics that other boiler manufacturers do not have :

a.The burner, upper & lower drums and convective tube banks are assembled in workshop to reduce to workload at site, shorten the assembly period,ensure the assembly quality and cut the investment for client.

b.The boiler has double drums, total water tube and natural circulation, with large water capacit, large radiation heating surface,,large output capacity and safe & reliable operation.

c.Our boiler is featured in the left & right sides of furnace, where are all membrane walls. This feature helps enlarge the radiation heating surface effectively and enable the boiler with excellent workload capacity. Detailed explanation is follwed:

Ⅰ、Membrane walls have great rigidity and are well sealed, so there will be no transformation of two sides during operation and no need of refractory material, which can be replaced with light insulation material. The light of boiler brickwork and workload & cost of brickwork is less than others.                                                                                                                                                                          

Ⅱ、Due to the well sealed membrane wall, less heat loss and flue gas loss, and higher boiler efficiency.

Ⅲ、The boiler temperature can rise up and cool down more quickly, shortening the start up and shut up time.

d.For ash cleaning of convective tube bank, we provide bypass ash dropped unit and internal ash dropped unit for your choice. Both of them can help keep the cleanness of tube bank and maintain the effective heat exchange between water in the tube and gas.                                                     e.The front and rear membrane wall can extend to the end of fore -and-aft arches, helping them attached to the membrane walls and not breaking downing during cooling.

f.The left & right membrane walls extend until the side sealing, to reduce the coking on the furnace, which affects the burning.

g.The rear membrane wall is sparse with two rows with fire wall in middle. The fire wall can protect the walls and form a reburning chamber. The carbon in the fly ash can be burned totally in the chamber so that the boiler efficiency is higher and the exhausted gas is cleaner.

h. In the aspect of combustion equipment, the enhanced active grate is adopted to ensure the safe and reliable operation of the grate.. To reduce the coal leak, we apply big grate for passive ones, and seven independent wind chambers under grate, which provide uniformly and adjusted wind from two sides. We can control the wind to meet different working condition's need.

i.The coal gate is water-cooled sawtooth type, which can loosen the coal to improve the burning surface. After years' practice, it's proven that this type coal gate can help the coal burned totally and there will be less coal in slag, and less incomplete combustion loss.

j.Finned tube of economizer can reduce the ash deposition in economizer. There is manhole for check and maintain above economizer. 

Since the shop-assembled boiler of our factory has been put into the market, it has been welcomed by customers with its unique design, good operating performance and low supporting investment.

This series of products was awarded the National New Product Award by the Ministry of Economy and Trade in 1997, and the Golden Bull Award for Excellent New Products of Jiangsu Province in 1998.

Q: What are the boiler files?
Boiler manufacturing units and boiler use units of the file is not the same:
Q: I have a HS TARM Multi-fuel Boiler # OT 35 It was made in Denmark around 1977. Any suggestions on how to convert this to burn pellets? Thanks for your help!
You'll need to design how to attach and have the auto feed for the hopper for the pellets and you'll have to make sure that the burning grate is able to handle pellets. So a hole or other minor change for hopper pellet chute (feed hole), hopper attachment to boiler, automated hopper feeder (small motor on setup to timed feeding, force pellets to chute), fan setup to run to increase flame and heat to burn pellets well. If you do this may I suggest a UPS (uniterruptable power supply) for a computer attached to kep the hopper and fan operating during a blackout to maintain heat. I had a customer with a pellet stove for heat and during a blackout he removed ups from the computer and ran the stove instead and it kept the house warm for the 2 hours they were without power (1100va unit in this case).
Q: In The Nightmare On Elm Street movies, why do they always show a boiler room?
That is where the people killed Fredrick. He also lives there now. His glove is often seen in the furnace.
Q: If blast why it happens.
The boiler will explode only if the pressure inside exceeds the capacity,but there is a safety valve to take care of it.
Q: Looking for the number of 600HP and greater natural gas-fired boilers in the US and worldwide? Any resources or help appreciated!!
Boilers aren't measured in horsepower. If you attached a steam engine to one, you'd measure that in HP. Boilers are often measured in BTU (British thermal units). Horsepower with steam engines is a measurement of BTU over time, with the rate dependent on the size and nature of the steam engine.
Q: My boiler stops working if the heat doesn't need to run for a while. Like during the day web no one is home we turn it down to 65. Same at night. We have to hit the reset button in order for it to start working again. We just had it cleaned thinking that was the issue. Plz help. We're cold!!
Some of the modern boilers get confused when there is a lot of wind because it makes them think that the gas-output is behaving irregularly. I suppose they are designed to do this as a safety or efficiency mechanism. Restting the system each time this happens is the only way to correct the problem. ..... other than buying a new boiler. (Note my discreet use of the )
Q: i have an old fireplace with back boiler, and i want to upgrade it and take the back boiler out. I've been told the boiler from the bathroom will need moving (i dont know why) to adifferent location within the house. How much will it cost to upgrade the fireplace and to buy and install a new boiler?
taking the old back boiler out can be a dirty, dusty job, it not only involves a plumber but also a builder. I cant help you with the costs you will have to get a couple of estimates. The boiler in the bathroom is a different matter. This is not allowed under the gas regulations unless it is a room sealed unit (balanced flue). The moisture laden air in a bathroom can interfere with the burning gas in an open flued boiler and produce carbon monoxide. I suspect you have an open flued boiler. However a new room sealed boiler could possibly be installed there, it would depend upon the manufacturers instructions, for example how far would the flue be from an openable window, plus other conditions. a CORGI installer would have to check it out. Most modern condensing combi boilers are room sealed, and they vary greatly in price. Get a few estimates, and don't take the first guy that comes along
Q: I would like to know the life expectancy of this tube so that I can compare it with a Copper tube used for the same purpose. Thanks a lot.
Boiler tube? Like a copper tube bundle for heat exchangers? Industry uses copper for that application instead of steel because of copper's lower corrosion qualities. Carbon steel is still a ferrous metal, and therefore subject to corrosion. So industry shies away from using metals which display a high rate of failure in commercial applications. Why wouldn't you?
Q: Gas boiler thermal efficiency problem
Evaporation of 140 tons of hot water required for 50 degrees: (2690.8-209.85) × 140000 = 347333000 (KJ) = 347333 (MJ)
Q: As of right now our central air doesn't work unless we recharge it every summer. Our boiler is old and leaks. We are throwing around the idea of changing to forced air but aren't sure what the better/cheapest route would be. Any help would be greatly appreciated!
I would replace them. I live in the midwest where it is hot in the summer and cold in the winter. When my central air quit, the repairman recommended just getting a new unit and furnace as well. I suspected they just wanted my money, but after consulting with people who know about these things, I decided to replace the furnace and air conditioner. I have a two story house and it is not unusual to have $300 heating and cooling bills. The winter after the furnace replacement was cold, but my gas usage was literally half of what it was the winter before. The next summer, the same thing with my cooling costs, about $100 a month less. It will cost a lot to replace them, but it will save money in the long run. Of course call someone else for another opinion.

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