Low Nitrogen Energy Saving 3.6m Two-Stage Gas Producer Gas Production Equipment

• Customization: Available
• Application Fields: Chemical, Electronic, Medical, New Energy, Petroleum, Pharmaceutical, Gas
• Certification: ISO
• Model NO.: 1.5m-4.6m
• Noise Level: Low
• Parts: Valve
• Purpose: Gas Manufacturing
• Structure: Horizontal
• Types: Air separation equipment
• Working principle: Adsorption separation
• Energy Saving Grade: Advanced
• Material: Carbon Steel
• Product Model: 1.5m-4.6m
• Industry of Use: Steel, Metallurgy
• Application Scenario: Production
• Advantage: Energy Saving and Environmental Protection
• Transport Package: Frame Transport
• Specification: 1.5*3500mm
• Trademark: CD
• Origin: China Tangshan City
• HS Code: 8405100000
• Production Capacity: 50/Month

Product Description

Structure of φ3.6m two-section producer:  φ3.6m:
1. Stoker
The stoker will adopt hydraulic drive, which is the coal feeding device with the structure that rotary drum on top, inserted plate in middle and bell type at bottom. This kind of structure could effectively avoid gas leakage. During coal feeding, firstly the bottom bell is closed, middle inserted plate is open, when the top rotary drum is open, the coal will be fed into the stoker from feed bin depending on the self weight of coal; and then the top rotary drum is closed, and middle inserted plate is also closed at the same time, and bottom bell is open, all the coal will fall into the producer, finally bottom bell is closed, thus a coal feeding cycle is completed. The coal feeding process can realize PLC programming automatic control.
2. Main body of producer
The main body of producer consists of refractory bricks, water jacket, grate, base disc, inlet bellows, etc.
The dry distillation section will be laid by high quality refractory bricks. The material for inner ring plate of water jacket will select 20g, and Q235-A for outer ring plate, so as to ensure enough safety for gas station. The water jacket is connected with steam header, the natural circulation system of softened water is formed from up and down. The softened water goes into the steam header at first, and then descends into the water jacket from steam header. The water-vapour mixture is generated after heating, and goes to the steam header via riser pipe. The steam separated by water separator will be used as gasification agent. Only when supply of softened water stops for temporarily maintaining the production, the water used in water jacket could be allowed to use running water for a short period.

No.	Item	Spec. & main parameters	Qty.		Remarks
			total	standby
1	Coal hoist	V=1m3/time, 10m3/h	2		2t hoist
2	Coal feeding mechanism	Hydraulic top inserted plate and bottom bell jar	1		PLC programmatic control
3	Main body of gas producer	φ3200	1
4	Producer lining		1
5	Steam collecting drum	φ1200	1
6	Air check valve	DN400	1
7	Natural suction valve	φ250	1
8	Bell type valve	DN300	1
9	Cyclone dust collector	Φ1800	1		Internal insulation
10	Forced air cooler	32	1
11	Cyclone detarring device	φ1200	1
12	Electro detarrer	C-39	1		Including power supply
13	Plate-shell heat exchanger	C-234	1
14	Electrostatic dust collector	C-72	1		Including power supply
15	Air blower	P=45KW	2	1
16	Gas booster	P=90KW	2	1
17	Soft water tank	φ2000×1800	1
18	Condensate pump for tar, light oil	50YW15-16	1
20	Centrifugal pump	IS150-125-315,P=30KW	2	1
22	Worm gear wafer butterfly valve	DN250  D371X-1	2	1

The base disk consists of ratchet wheel and ash disk. The ratchet wheel and grate are fixed on the base disk. The grate installed by our company was produced through years of research and design, so as to ensure uniform distribution of air at gas producer bottom; and ash removal on both sides also could avoid the offset during gas producer's operation and reduce the air blasting resistance, therefore reduce the carry-away matters, it benefits for the purification of gas. The antifriction bearing is installed below the ash disk, the grate is turning at the time when the ash disk is rotating, the ash residue will fall into the ash disk. The ash residue will be broken by small ash knife and be removed out of the ash disk by big ash knife. The inlet bellows in middle and water seal circle below the ash dish will form the water sealing.
Reference table for content of each component of producer gas (bituminous coal for firing)

Item	Volumetric component of dry gas(%)							Density (kg/ Nm^3)	LHV (KJ/Nm^3)
	CO2+H2S	O2	CmHn	CO	H2	CH4	N2
%	3~7	0.1-0.3	0.2-0.4	25-30	11-15	1.5-3	47-54	1.1~1.13	5020~6280
Remark: The coal for gasification should abide by ' Quality standard of the coal for gasification of Atmospheric fixed bed gas producer' (GB9143-2001); Please abide strictly by this standard to avoid problems occur during operation in the future.

Use coal hoist to feed the coal into the coal bin, and feed the coal into the chamber of gas producer via stoker. After that the coal will carry out drying and dry distillation in dry distillation section of gas producer. The coal will move down slowly with the temperature rising gradually, and then arrive at gasification section after 10-12 hours. In dry distillation section, the heat generated by part of ascending gas in gasification section will release the moisture in the coal, tar and most of sulfide will also be dry distilled out, and then the hydrocarbon will be generated which will form the top gas with part of ascending gas in gasification section. The semi-coke shape coal char entering into gasification section will produce the gas after gasification reaction, one part of gas produced will go upwards to dry distillation section, and another part will form lower gas in gasification section.
The top gas will leave gas producer and enter into electro detarrer after passing through cyclone detarring device to remove the tar carried by gas, and then mix with lower gas.
After most of dust is removed by cyclone dust collector, the lower gas will enter into air cooler through wet disk valve. After air cooling, the gas temperature will be decreased upto about 150-180ºC from 400-500ºC, and then mix with the top gas.
The mixed gas will enter electrostatic dust collector to remove the dust and light oil in the gas, and be cooled further upto normal temperature through indirect cooler.
The mixed gas will be delivered to desulfurization system to remove the sulfur after pressure increasing by gas booster, and then the clean gas will be conveyed to kiln for use at last. The coal tar, light oil and condensate separated from electro detarrer, electrostatic dust collector and scrubber will enter into separating pond. After separating, the coal tar and light oil can be supplied externally, and also can be used with condensate together as fuel for boiler. The condensate also can mix with pulverized coal to make into coal water slurry for fuel use.
Final indexes of gas :
Gas output :                  5500-8000Nm³/h
Gas Calorific value:           ≥6061 KJ/Nm³
Dust content in gas:           ≤25 mg/Nm³
Tar content in gas:             ≤20 mg/Nm³
H₂S content in gas:             ≤50 mg/Nm³
Gas temperature at station outlet: 35~45ºC

Recommended type and producing area of coal :

1. Quality standard of coal for gas producer

Item	Technical requirements	Test method
Size grading	Bituminous coal:25-60, 50-80mm	GB189
Lower size limit of lump coal	50-80 mm, size grading≤15%	MT1
Refuse rate	<2.0%~3.0%	MT1
Ash content(Ad)	Grade 1:Ad≤18%;Grade 2: 18%< Ad≤24%	GB212
Total S(St,d)	St,d≤2%	GB214
Softening temp. of coal ash(ST)	ST≥1250ºC;when Ad≤18%,ST≥1200ºC	GB219
Thermal stability(S+σ)	ST+σ>60%	GB1573
Crushing strength (>25mm)	>60%	GB7561
thickness of gelatine layer(γ)	γ<12mm;	GB7479
Calorific value(Qnet,ar)	Bituminous coal  Qnet,ar>21MJ/kg	GB213

 

,Consumption of raw material:
1.Material table for single producer (yearly working time is based on 7920h)

No.	Material	Amount per hour(kg)	Amount per day(t)	Amount per year(t)
1	Coal fed for firing	2000	48	15840
2	Dry producer ash residue	400	9.6	3168
3	Carried matter	20	0.48	158.4
4	Tar, light oil	40	0.96	316.8

 
2.Table of steam for production and steam quantity for single producer  

No.	Steam used point	Service pressure(MPa)	Max. (kg/h)	Average (kg/h)	Remarks
1	Steam seal for fire detection	0.3	160	100	intermittent
2	Purging of equipments and pipelines	0.3	(200)		regular
3	For make-up of saturated air	0.05	400	400	Continuous consumption: 800kg/h Provide by water jacket
4	Insulation for pipelines and insulator box	0.3	240	240	continuous
5	Electric detarring and heating for tar tank	0.3	600	400	intermittent
6	Bellows of main producer and various oil tank	0.3	60	60	continuous
	Total		1660	1200

 
3.Table of soften water consumption per producer :

Steam used point	Service pressure(MPa)	Max. (kg/h)	Average (kg/h)	Remarks
Water jacket of producer	0.3	400	300	The quality of continuous water reaches the standard of water for boiler.

 
4.Table of water amount for production per producer :

No.	Water used point	Service pressure(MPa)	Max. (t/h)	Average (t/h)	Remarks
1	Bellows of producer	≥0.15	0.4	0.2	continuous
2	Dust hopper of dust collector	≥0.15	0.6	0.3	intermittent
3	Make-up water for water circulation	>0.15	34.5	0.5	continuous
4	Water for laboratory and domestic use	>0.15	1.5	1.5	Intermittent running water
5	Ash tray of producer	≥0.15	3	0.4	intermittent
			40	2.9

   Note:  this amount is the water amount for production preparation stage, the maximum amount during normal production is 3t/h.