Ethylene Cracking Coil

Ethylene Cracking Coil 1.Standard:ASME,ANSI,ASTM,DIN,GB 2.Material:25Cr35Ni+MA 3.ISO9001:2008

Ethylene Cracking Coil

1.Standard:ASME,ANSI,ASTM,DIN,GB

2.Material:Alloy ZG40Cr25Ni35Nb,Hp-Nb+MA

3.Size:Dia.86/73X10820 or we can supply standard and nonstandard products as your requirement

4.Process:centrifugal casting

5.Quality:appearance of smooth,can work under presure for long time,advanced testing equipment to ensure thye quality,

6.Packing:Wooden box ,sea-worthy plywood pallets with polyethylene film or steel cases or as customers request.

7.Delivery time:30 to 60 days after we signed SALES CONTRACT.

8.Port of departure:Shanghai,Dalian;Qiangdao etc.

9.Certification:ISO9001:2008

10.Payment:L/C,T/T

11.Application:Used for Ethylene cracking furnace

Commercial furnaces

Thermal  cracking of hygrocarbons is accomplished in tubular reactors commonly known as cracking furnaces,crackers,cracking heaters,etc.

Several engineering contractors,including ABB Lummus Global, KBR,Linde,Stone and Webster(a Shaw Group Company),and Technip offer cracking furnace technology.

 ABB Lummus Global  it's produce ethylene for polymerization with purity 99.95% vol. Feed is heated and cracked in the presence of steam by tubular furnace,outlet temperature 815-870°C.Special construction of the coils of this furnace guarantee short residence time that why this furnaces callwd SRT.

Kellog Brown &Root propose wide choice of feed which can use in it's furnces from ethane to vacuum gas-oil.This furnace called SCORE,hve straight coils,short residence time about 0.1s nd low working pressure.Special construction furnace guarantee high outlet of olefinc hydrocarbons.

Two cracking furnaces may share a common stack, and the height of the heater may vary from 30 to 50m.

Before the 1960s,cracking tubes were rranged in horizontal rows in a radiant chamber,leading to low ethylene capcity(20,000 mta,metric tonnes per annum).Modern designs use tubes arranged in vertical rows,providing superior mechanical performance and higher capacity.Today,the cpcity of  single cell furnace is well over 150,000 mta.

Pyrolysis heater radiant coil characteristics(single heater range)

Number of coils	2-176
Coil length,m	9-80
Inside coil dimeter,mm	30-200
Process gs outlet temperature,°C	750-950
Clean coil metal temperature,°C	900-1,080
Maximum metal temperature,°C	1,040-1,150
Average heat absorption,kw/m2 external area	50-120
Bulk residence time,s	0.1-0.6
Coil outlet pressure,KPa	150-275
Clen coil pressure drop,KPa	10-200
Ethylene capacity,mta	20,000-250,000

Ethylene Cracking Coil