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Vertical pulverized coal furnace

Vertical pulverized coal furnace

Application:

Iron and steel metallurgy industry: pellet dry-slag vertical mill-coal mill, iron concentrate drying, manganese ore, zinc leaching slag, block ore, pyrite, laterite nickel ore, lithium ore, mica ore, lead-zinc ore, tailings, siderite, etc.;

Cement industry: slag powder, coal grinding, raw material grinding, ball grinding, V selection powder grinding system, clay drying, yellow sand, dry mixed mortar, slag drying, iron powder drying, construction gypsum drying etc.;

Chemical industry: phosphogypsum, charcoal drying, desulfurized gypsum, lignite drying, white dioxide black, titanium dioxide, perlite, compound fertilizer, calcium carbide slag, quartz sand, coal slime, pulverized coal preparation, kaolin etc.;

Ceramic industry: spray drying tower, etc.;

Solid waste: sludge, tailings, calcium carbide slag, phosphogypsum, limestone powder, fly ash, volcanic ash, etc.

Working principle:

vertical steel mixed pulverized coal furnace is a kind of low-nitrogen and oxygen-controlled industrial furnace, use pulverized coal as fuel to supply high temperature flue gas. The pulverized coal burns in a suspended state under the action of air. The furnace has the advantages of rapid combustion, large capacity, high efficiency, wide adaptability, and convenient control and adjustment etc. With the large scale of flue gas heating furnace, pulverized coal furnace has great advantages in high temperature combustion, easy control, large scale and so on.

Detail

Main performance and features:

★ Pulverized coal easy to prepare and store: the raw coal is pulverized and sent into the pulverized coal warehouse for storage, and the high pressure wind sends the pulverized coal into the burner combustion;

★ Automatic ignition convenient and fast: pulverized coal combustion ignition using light diesel oil, high-energy igniter with the oil supply system to achieve automatic ignition;

★ Cyclone low nitrogen efficient combustion: using a multi-channel cyclone burner, through the adjustment of combustion-assisted air to make the pulverized coal in the furnace efficient and stable combustion;

★ Reasonable control and operation simple: reasonable adjustment of air distribution to make the internal heat load in the furnace uniform, reduce the furnace body wall hanging, coking, easy to operate;

★ System linkage use safety: according to different working conditions, it can realize automatic ignition, automatic tracking of outlet temperature, safety alarm, system linkage and other control modes for users to choose;

★ stable structure, long service life, simple maintenance, short construction period, and low civil engineering cost;

★ furnace body is equipped with explosion-proof valve, emergency flue gas release valve etc.

PLC control system:

The state mark of normal operation of pulverized coal furnace is by light diesel ignition heating, make pulverized coal fire normal combustion, pulverized coal normal combustion light diesel ignition system automatically stop running, adjust the reasonable ratio of pulverized coal combustion and air volume, make the furnace temperature, outlet flue gas temperature, tailing gas temperature control within a certain range to dry material, for different processes, measurement and control parameters selection will be different.

According to the need of the central control DCS system, the PLC system can communicate with the DCS system; The communication modes include Ethernet, Profibus DP, Profinet, Modbus RTU, Modbus TCP and point-to-point etc. That is, the PLC control system can exchange data with the central control DCS system through the above communication methods, so as to realize the remote control of the DCS system to furnace on site.

Measurement and control process parameters of negative pressure heating system:

No.	Item	Code	Normal working range	measurement range	measurement and control instruments
1	Furnace box temperature	T1	600—1000℃	0—1200℃	Touch screen, thermocouple
2	hot air temperature at outlet	T2	100—1000℃	0—1200℃	Touch screen, thermocouple
3	Oil pressure	P1	0.4---1.2Mpa	0---4Mpa	Touch screen, pressure transmitter
4	Furnace pressure	P2	-500—100Pa	-500- 500Pa	Touch screen, pressure transmitter
5	blast pressure	P3	3---20Kpa	0---30Kpa	Touch screen, pressure transmitter
6	Return oil regulating valve position	Z1	0—100%	0—100%	Touch screen, electric actuator
7	Fuel drum valve position	Z2	0—100%	0—100%	Touch screen, electric actuator
8	Coal drum valve position	Z3	0—100%	0—100%	Touch screen, electric actuator
9	Oil flow	F1	By the process	By the process	Touch screen, differential pressure transmitter, etc