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4 sets of 25t/h chain furnace boilers, pressure 2.5MPa, temperature 400℃

2023-06-29 08:42:28

 1. Project overview

There are 4 ferrochrome smelting furnaces in the east factory area of ​​a South African chromium industry Co., Ltd., 1#, 2#, 3#, and 4#. Among them, the installed capacity of 1#, 2#, and 3# is 37MVA, and the installed capacity of 4# is 45MVA. ; There are 2 ferrochrome smelting furnaces, 5# and 6# in the west factory area, of which 5# has an installed capacity of 37MVA and 6# has an installed capacity of 45MVA. In this project, each smelting furnace is equipped with a waste heat boiler, and the waste heat boilers of 1# and 2#, 3# and 4# are placed next to each other; the waste heat boilers of 5# and 6# are arranged independently, and the boiler output All the steam is used to generate electricity by the air condenser turbogenerator set.

Due to the insufficient steam production of the waste heat boiler, it is now necessary to install a new boiler unit, and the steam generated is incorporated into the existing steam pipe network to supplement the power generation of the steam turbine. The construction scale of this project is four 25t/h chain furnace boilers (2.5MPa 400℃).

2. Main technical parameters and design conditions of the boiler

This boiler is a sub-medium pressure, natural circulation boiler, indoor layout, assembled chain furnace:

  1. Rated evaporation capacity: 25/h
  2. Vapor pressure: 2.5MPa
  3. Steam temperature: 400℃
  4. Feed water temperature: 105℃
  5. Exhaust gas temperature: <170°C
  6. Continuous sewage discharge rate: 2%
  7. Design efficiency: >80%

Boiler design coal type analysis parameters are shown in the table below:

Coal Quality Analysis Report
  TM (Moisture) Ash (ash content) CV (calorific value) Vol. (volatile matter) Fixed carbon (fixed carbon) TS (sulfur)
  % m/m % m/m MJ/kg % m/m By difference % m/m
1   20.8 24.05 25.8 50.4 1.00
2   16.1 26.08 25.6 55.4 2.01
3   20.6 24.63 24.5 51.8 0.90
4 7.1 29.7 21.08 23.4 44.7 0.92

Inner Mongolia Yonghe 2*SZL25-1.25-AII Chain Grate Boiler Project

2 sets of 25-ton szl chain grate boiler project, the customer company is a chemical plant, and the 25-ton steam boiler will be used in the production of chemical products. After half a year of installation, two industrial steam boilers are now in operation. Chemical plant boilers have a wide range of choices and different uses. Environmentally-friendly coal-fired steam boilers are currently the main equipment purchased by chemical companies in many non-key areas, because the country allows new coal-fired boilers of more than 20 tons, as long as they are equipped with corresponding out-of-stock The dust removal equipment can meet the boiler emission standard of Inner Mongolia.

Three 25-ton chain grate boiler projects in Ali area

In 60 days, ZBG group was working in parallel with many manufacturing tasks, and ZBG group worked overtime to rush out 3 SZL steam boilers in Ali, Tibet, so that the residents in the area could complete the installation and trial operation before the winter heating period. ZBG group SZL chain grate boiler is ZBG group's industry masterpiece in the field of chain grate technology, and it can be called the best design solution in the industry. The absolute advantage in technology has also contributed to this tens of millions of orders.

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