Moving Grate Coal Fired Steam Boiler

Moving Grate Coal Fired Steam Boiler

DZH Series coal fired steam boiler is single drum longitudinal type water and fire tube steam boiler,the combustion equipment is moving grate.The boiler mainframe in general configuration adopts the form of drum overhead and bilateral symmetry of water wall tube and header.The drum is installed and welded by boiler barrel and front & back tube plates.It has high burning efficiency due to the spark retaining wall located in the interior of furnace.

This series of boiler adopts latest scientific research achievements,such as arched tube plate, thread smokestacks, etc. It solves the problem of the pot shell type boiler tube plate cracking, pan cone lower speed bulge, water-cooled wall tube explosion, low thermal efficiency, insufficient of power and poor adaptability of coal.

Rated Capacity:

0.5~10t/h

Pressure:

<2.5 Mpa

Certificate:

ISO 9001, CE, BV, SGS, ASME

Fuel:

Different coal and biomass fuels

Boilers Structure

Moving Grate Coal Fired Steam Boiler

1. It uses arched tube plate and thread smokestacks constituted into the drum, reduces the stress.The fire tube inside of tube plate is single return instead of two-return, solves the problem of tube plate cracking.

2. The ascendable pipes are arranged at the bottom of drum,this makes the sludge deposit uneasy, prevents the drum bottom swelling.

3. The boiler aopts efficient heat transfer threaded pipes, strengthen heat transfer, and then heating-up and pressure boost -up quickly, the thermal efficiency increased.

4. Both wing wall and outlet widow inside of the furnace have the function of dust suppression, thus ensuring the soot discharge scratch the index stipulated by the State Environmental Protection.

Auxiliary equipment

Grate

Grate

The grate could be designed as moving grate, chain grate and reciprocating grate based on the fuel characteristics.

CONTROL SYSTEM

CONTROL SYSTEM

We use Siemens PLC and Schneider electrical components. can realize automatic interlock control to ensure boiler safe operate.

ECONOMIZER

ECONOMIZER

The economizer adopts aluminum alloy fin tubes, its heating transfer area is 2-10 times larger than the bare tube, has a good heating transfer and mechanical property.

WATER PUMP

WATER PUMP

We adopts the stainless vertical pump with low noise, stainless impeller and pump body.

Steam header

Steam header

Standard configuration: one inlet, three outlets, equipped with pressure gauge and thermometer. It can be designed according to customers' requirement.

Water softener

Water softener

It is fully automatic and free debugging. We adopts PE material for salt tank body, it has hard texture and it is easy to move, anti-shock, and no leakage.

Quality

Zhongding Boiler pay more attention to the boiler quality from raw material to producing process.

boiler quality
we choose domestic well-known manufacturer who can provide component report of raw material, to ensure the raw material is qualified. After the completion of raw material procurement, there are specialized technicians in our factory to make sampling chemical composition analysis and physical performance analysis, and we can also provide raw materials inspection report.
We adopt numerical control cutting, which has the advantage of high precision, neat cutting surface, nice appearance and high material utilization.
Boiler manufacturing
Boiler production
We adopt submerged arc fully automatic welding. When each welding process is done, the 100% X-ray inspection will be arranged for every welding seam, which can prevent the defective parts from flowing into the next process.

Parameter

Model Item DZH0.5-0.7-AII
DZH0.5-1.0-AII
DZH1-0.7-AII
DZH1-1.0-AII
DZH1-1.25-AII
DZH2-0.7-AII
DZH2-1.0-AII
DZH2-1.25-AII
DZH2-1.6-AII
DZH4-1.25-AII
DZH4-1.6-AII
Rated evaporation
capacity (t/h)
0.5 1 2 4
Working
pressure(Mpa)
0.7/1.0 0.7/1.0/1.25 0.7/1.0/1.25/1.6 1.25/1.6
Rated steam
temperature(℃)
170/184 170/184/194 170/184/194/204 194/204
Feed water
temperature(℃)
20 20 20 20
Effective area of
grate(m2)
1.28 2.1 3.36 5.2
Fuel consumption
(Kg/h)
76 150 301 602
Exhaust flue gas
temperature(C)
165 165 165 165
Thermal Efficiency
(%)
80 80 80 80
Size(m) 3.2x 2.0x 2.6 4.1x 2.2x 2.9 4.7x 2.3x 3.2 5.6x 2.5x 3.5
Weight (t) 8 12 15 22
Note:Parameters is for reference only,please be subject to the actual drawing if any change.

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