Circulating Fluidized Bed Gasification System-Coal Gasification System- Coal Gasifier

Circulating Fluidized Bed Gasification SystemProcess Flow:After crushing and sieving, the coal ( size≤10mm) is carried to coal scuttle by belt conveyors, conveyed to gasifier by screw feeder; and reacts with gasification agent(air or oxygen-enriched air)which was preheated to high temperature roughly through high temperature preheater in the gasifier, temperature is about 950ºC. Streams are in the fluidization state ,the furnace contains no dry distillation layer, and the tar, phenol and cyanide decompose completely under high temperature.
Coal gas flows through cyclone separator, high temperature preheater, waste heat recovery, fly-ash filter and gas coolerA/Bfor cooling down and dust removal. After desulphurization and compression, the gas can be sent to users. Flow Chartof Circulating Fluidized Bed Gasification System
Features:
(1)Clean: no discharge of tar, phenol-cyanogen waste-water; H2Scontent≤20 mg/Nm3, dust≤10 mg/Nm3, almost the same cleanness as natural gas.(2)Efficient:with full counter-current heat transfer, more than 90% of gas sensible heat can be recovered; high-temperature combustion technology can significantly increase gas calorific value.(3)Low cost: fine coal can be used, the cost of gas production can be significantly reduced.(4)High output: 10kNm3/h, 20kNm3/h, 40kNm3/h, 50kNm3/h, 60kNm3/h available, and load range can be adjusted.(5)Safe and stable operation:perfect safety protection interlock, one-button parking; key equipment can be replaced online, the longest running period of a single furnace can be up to 12 months.Coal indexRecommended coalQnet,arVadAadCRCS.T.Bituminite, sub-bituminous,lignite coal ≥4500kcal/kg≥28%≤20%≤4≥1150ºCNote: the calorific value of lignite is the index after drying.Gas composition
If the mixture of air and steam are used as gasifying agent, the gas composition are as follows:ComponentCOH2CH4CO2N2Qnet/kcal/Nm3Vol.-%20~2418~221~38~1245~50≥1250
If 30% oxygen-enriched air and steam are used as gasifying agent, the gas composition are as follows:ComponentCOH2CH4CO2N2Qnet/kcal/Nm3Vol.-%23~2623~262~312~1430~35≥1550
Engineering performance
KEDA has contracted clean coal gasification equipment at home and abroad : 10kNm3/hseries 28 sets, 20kNm3/hseries 26 sets, 40kNm3/hseries 11 sets, 50kNm3/hseries 2 sets, 60kNm3/hseries 3 sets. Application fields cover ceramics, aluminum refinery, carbon, glass, non-ferrous metallurgy, powergeneration, coal chemical industry, etc.
(1)Clean coal gasification project- Guangxi Xinfa Aluminum Refinery Co., Ltd.
Description: EPC of clean coal gasification project (4x10kNm³/h)(phase I)
EPC of clean coal gasification project (8x20kNm³/h) (phase II)
Equipment: 10kNm³/h circulating fluidized bed gasification equipment(phase I)
20kNm³/h circulating fluidized bed gasification equipment(phase II)
Operation: In Jan.2013(phase I),in Nov.2015(phase II)
Area: Alumina refinery(2)Clean coal gasification project- Shanxi Xinfa Chemical Co., Ltd.
Description: EPC of clean coal gasification project (8x20kNm³/h)(phase I)
EPC of clean coal gasification project (3x60kNm³/h) (phase II)
Equipment: 20kNm³/h circulating fluidized bed gasification equipment(phase I)
60kNm³/h circulating fluidized bed gasification equipment(phase II)
Operation: In Aug.2018(phase I),in Jul.2018(phase II)
Area: Alumina refinery(3)Clean coal gasification project- Guizhou Huajin Aluminum Co., Ltd.
Description: EPC of clean coal gasification project 3x40kNm³/h)
Equipment: 40kNm³/h circulating fluidized bed gasification equipment
Operation: In may 2015
Area:Alumina refinery(4)Clean coal gasification project- PT. JUI SHIN INDONESIA
Description: EPC of clean coal gasification project 1x40kNm³/h)
Equipment: 40kNm³/h circulating fluidized bed gasification equipment
Operation: In Aug. 2016
Area:Ceramics(5)Clean coal gasification project- Xinjiang heaven dragon mining Co., Ltd.
In Jun. 2017, 2 sets of 10kNm3/h CFBC clean coal gasification equipment put into operation in Xinjiang heaven dragon mining Co., Ltd., it is the first time for the company to apply circulating fluidized bed gasification technology to carbon industry after alumina and ceramic industry.