Radiation waste heat boiler, gasification furnace comprising radiation waste heat boiler, heat recovery system and heat recovery process
A heat recovery and waste boiler technology, applied in the field of gasifiers, can solve the problems of not being able to by-produce superheated steam and high investment costs, and achieve the effects of reducing investment costs, overcoming complex designs and being difficult to dry burning.
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Embodiment 1
[0083]With a hydraulizing gasification apparatus for producing chemicals as end use, the coal gasification scale of the gasifier furnace is 1500t / d, and the high temperature gas flow of the delivery furnace into the radiation waste is about 190000 nm.3 / h, the temperature is 1340 ° C, the ash flow rate is 6800 kg / h (where the ash content is about 30%), and the pressure is 6.5 MPa. In order to recover the thermal gas carrying the high temperature gas, a casing inner diameter D1 is 4200 mm at the bottom of the gasification chamber, and the diameter D2 D2 is 3200 mm in the water-cooled wall liner. The straight height is 12m. Long radiation screen and the second radiation screen interval setting, The number of pieces is 16 pieces, and the length of the long radiation screen is 628mm. The length of the long radiation screen and the second radiation screen range from 314mm, the first radiation screen and the convection section length ratio of 0.75, the length of the long radiation scr...
Embodiment 2
[0086]The length of the long radiation screen is changed to 419mm. The number of long radiation screen is changed to 24 groups. The second radiation screen is not set, the length ratio of the first radiation screen and the convection section is changed to 0.4 (specifically, the first radiation screen includes 4 water cold tubes) , 2 radial arrangement distribution, 2 circumferential distribution; the flow segment includes a water cooled tubing of 5 radial distributions), and other conditions are the same as in Example 1.
[0087]The overheating steam yield is 113t / h, the overheating steam temperature is 527 ° C, the temperature of the waste pot is about 607 ° C; the radiation scrap height H is 12m, which is 43% higher than the conventional radiation waste.
Embodiment 3
[0089]The high height of the waste pot is 15mm, the number of long radiation screen is changed to 12 groups, the second radiation screen 12 group, long radiation screen spacing 837mm, long radiation screen and second radiation screen spacing 418mm, first radiation screen and convection section length ratio L1 / L2 is 0.6, the long radiation screen and the second radiation screen length L3 / L4 are 1.2 (specifically, the first radiation screen includes 5 water cold tubes, wherein the three radial distribution, 2 circumferential distribution is on both sides; The convection section includes 5 radially distributed water-cooled pipes; the second radiation screen includes four radial distribution water cold tubes), and other conditions are the same as in Example 1.
[0090]The overheated steam production is about 107T / h, the overheating steam temperature is 425 ° C, the waste sago synthesis gas temperature is about 713 ° C; the radiation scrap height H is 12m, which is 43% lower than the ...
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