CN100545236C - Dry decoking process for shale oil extracting furnace - Google Patents
Dry decoking process for shale oil extracting furnace Download PDFInfo
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- CN100545236C CN100545236C CN 200610163235 CN200610163235A CN100545236C CN 100545236 C CN100545236 C CN 100545236C CN 200610163235 CN200610163235 CN 200610163235 CN 200610163235 A CN200610163235 A CN 200610163235A CN 100545236 C CN100545236 C CN 100545236C
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- semicoke
- standpipe
- loop seal
- gas retort
- ash ejector
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Abstract
The present invention proposes a kind of dry decoking process for shale oil extracting furnace, block resinous shale (8～75mm) semicokes that in gas retort, obtain after the low-temperature pyrolysis (200～300 ℃), discharge from the gas retort bottom ash discharging hole, behind the adjustable type ash ejector, with spray desuperheating device trace spray desuperheating to 50～200 ℃, after entering sealed crusher in crushing to 0～8mm, enter in the standpipe.Connect on-mechanical formula loop seal below the standpipe, keep 2～3 meters material levels in the standpipe, to isolate methane gas and outside air in the stove, the material level of standpipe is adjusted by adjustable ash ejector and inflation pressure.Semicoke enters the semicoke storage warehouse behind on-mechanical formula loop seal, export the boiler feeding system to through belt conveyor again.It is too high to have solved in traditional wet method decoking the semicoke water content, and the semicoke calorific value that causes coal-char combustion to utilize again causing in the process is low, and broken and coal supply system stops up, and reaches a series of problems such as boiler back end ductwork corrosion.
Description
Technical field
The present invention relates to oil shale oil-refining stove decoking process, relate in particular to a kind of dry decoking process for shale oil extracting furnace.
Background technology
At present, existing block shale (8～75mm) oil Refining Technologies, comprise Chinese Fushun type retort, Brazil Pei Teluosekesi (Petrosix) gas retort, Estonia's Abel Kiviat (Kiviter) gas retort all is to adopt the wet method decoking process, be that 200-300 ℃ of semicoke directly enters in the pond of furnace bottom, water level in water pool is higher than the gas retort slag-drip opening, forms good sealing at the gas retort afterbody like this.The semicoke of discharging transports out through equipment such as dragveyers again, is deposited into " semicoke stores heap ".Because oil shale semi-coke all is to adopt the mode outdoor storage of storing up at present, further burning does not utilize, and therefore to not restriction of the water content in the semicoke, therefore domestic and international existing gas retort all is to adopt wet method decoking mode.The advantage of this wet method decoking process is well to have solved the gas retort bottom problem of leaking out, both prevented extraneous air admission gas retort, make the burning of part shale oil and cause waste, prevent that simultaneously the coal mine gas in the gas retort from spilling from the gas retort bottom, cause the wasting of resources, even the danger of gas explosion takes place.The fatal shortcoming of wet method decoking process is semicoke water ratio too high (sometimes even be higher than 50%), and thermal value very low (600kcal/kg is following) is restricted the reignition utilization of semicoke.
Technical scheme
The purpose of patent of the present invention is to overcome the problem that above-mentioned prior art exists, and a kind of dry decoking process for shale oil extracting furnace that provides.
The objective of the invention is to realize by the following technical solutions:
A kind of dry decoking process for shale oil extracting furnace, 200～300 ℃ of semicokes of temperature from the discharge of gas retort bottom ash discharging hole, through the adjustable type ash ejector, with spray desuperheating device trace spray cooling to 50～200 ℃, enter sealed crusher then, described semicoke enters in the standpipe behind sealed crusher in crushing to 0～8mm, connects on-mechanical formula loop seal below the standpipe; Keep 2-3 rice material level in the standpipe, to isolate methane gas and outside air in the stove; The pressure of the inflation inlet of the baffle opening that the material level of standpipe can be by regulating the adjustable type ash ejector or the rotating speed of conical rotary ash ejector, on-mechanical formula loop seal is adjusted; Semicoke after the fragmentation enters the semicoke storage warehouse behind on-mechanical formula loop seal, export the boiler feeding system to through belt conveyor again.
Above-mentioned dry decoking process for shale oil extracting furnace, its described gas retort are selected from Chinese Fushun type retort, Brazilian Pei Teluosekesi gas retort or Estonia's Abel Kiviat gas retort.
Above-mentioned dry decoking process for shale oil extracting furnace, its described on-mechanical formula loop seal is selected from the L shaped valve or the U-shaped valve of circulating fluidized bed, and so that the semicoke of pulverizing is transported to the semicoke storage warehouse, on-mechanical formula loop seal adopts gas to promote the solid particulate motion.
Above-mentioned dry decoking process for shale oil extracting furnace, its described sealed crusher are selected from jaw crusher, ring is beaten formula crusher or impact breaker, and top is provided with opening for feed, and the bottom is provided with discharge port.
Above-mentioned dry decoking process for shale oil extracting furnace, its described adjustable type ash ejector are the rotary ash ejector of low speed, and this ash ejector external diameter is than the little 160～200mm of ash discharging hole internal diameter.
The present invention compared with prior art, have significant technical progress and positive effect: contain free moisture hardly by the resulting oil shale semi-coke of this technology, thermal value can reach 600～1500kcal/kg, is much higher than semicoke as received basis calorific value in the wet method decoking process.(calorific value 1000～3000kcal/kg) mixes the back by a certain percentage and forms propellant combination, and calorific value guarantees more than 800kcal/kg, can directly send into burning utilization in the circulating fluidized bed with dry process semicoke that obtains and the chip shale that can not refine oil.
The great advantage of this technology is to utilize the principle of circulating fluidized bed revert system to the air seal effect, decoking with gas retort, the semicoke fragmentation, and utilize solid material envelope that the air seal effect organically is combined into one, realized the dry method decoking process, simultaneously the shattering process of semicoke has been moved on to the destructive distillation furnace side by the crushing system of boiler and realize.The semicoke that this technology obtained and the propellant combination of resinous shale can stable burnings in circular fluid bed, fuel crushing and feeding system working stability, and no latch up phenomenon, the heated surface at the end of boiler corrosion is lighter.
Description of drawings
Fig. 1 is process flow diagram of the present invention (L type on-mechanical formula loop seal, adjustable type ash ejector are provided with and regulate plate washer).
Fig. 2 is process flow diagram of the present invention (L type on-mechanical formula loop seal, adjustable type ash ejector are conical rotary).
Fig. 3 is process flow diagram of the present invention (U type on-mechanical formula loop seal, adjustable type ash ejector are provided with and regulate plate washer).Wherein,
1-gas retort 2-adjustable type ash ejector 3-spray desuperheating device
The sealed crusher 5-of 4-standpipe 6-material envelope 7-inflation inlet
8-on-mechanical formula loop seal 9-semicoke storage warehouse 10-belt conveyor.
Embodiment
Embodiment 1:
As shown in Figure 1, gas retort adopts the Fushun formula oil refining furnace of China, and stove is upright round shape, outer wall be steel plate, inner lining refractory block, internal diameter less than 3m, higher primary school is in 10m.At first this gas retort 1 is installed on the high platform of 8-10m, 200 ℃ of semicokes that the gas retort bottom ash discharging hole is discharged, through adjustable type ash ejector 2, with spray desuperheating device 3 micro-spray desuperheatings or do not spray water to below 50～200 ℃, enter sealed jaw crusher (4), semicoke enters in the standpipe 5 after sealed jaw crusher 4 is crushed to 0～8mm, connects L type on-mechanical loop seal 8 below the standpipe 5.The returning charge wind of this L type on-mechanical loop seal 8, can provide by roots blower independently, keep 2-3 rice material level in the standpipe, to isolate methane gas and outside air in the stove, the material level of standpipe 5 can be adjusted by baffle opening and inflation inlet 7 pressure of regulating adjustable type ash ejector 2.Semicoke enters semicoke storage warehouse 9 behind L type on-mechanical loop seal (returning charge valve) 8, export Guo Lu Give material system to through belt conveyor 10 again.
Embodiment 2:
As shown in Figure 2, gas retort adopts Brazilian Pei Teluosekesi gas retort, and stove is upright round shape, outer wall be steel plate, inner lining refractory block, internal diameter less than 5.5m, higher primary school is in 10m.At first this gas retort 1 is installed on the high platform of 8-10m, 300 ℃ of the semicokes that the gas retort bottom ash discharging hole is discharged, (this ash ejector external diameter is littler by 160～200mm) 2 than ash discharging hole internal diameter through the rotary ash ejector of taper shape, with spray desuperheating device 3 spray desuperheatings to 50～below 200 ℃, enter wear ring and beat formula crusher 4.Wear ring is beaten formula crusher 4 and it is crushed to below the 8mm (after 0～8mm), is entered in the standpipe 5, connect L type on-mechanical loop seal 8 below the standpipe 5.The returning charge wind of L type on-mechanical loop seal 8 can be provided by roots blower independently, keep 2-3 rice material level in the standpipe 5, to isolate methane gas and outside air in the stove, the material level of standpipe 5 can be adjusted by the rotating speed of regulating conical rotating regulation type ash ejector 2, the pressure of inflation inlet 7.Semicoke enters semicoke storage warehouse 9 behind L type on-mechanical loop seal 8, export a pot stove Give material system to through belt conveyor 10 again.
Embodiment 3:
As shown in Figure 3, gas retort adopts Estonia's Abel Kiviat gas retort.At first this gas retort 1 is installed on the high platform of 8-10m, 250 ℃ of semicokes that the gas retort bottom ash discharging hole is discharged, through being provided with the adjustable type ash ejector 2 of controllable register, with below spray desuperheating device 3 micro-spray desuperheating to 50～200 ℃, enter sealing impact breaker 4, semicoke, enters in the standpipe 5 after impact breaker 4 is crushed to below the 8mm through sealing, connects U type on-mechanical loop seal 8 below the standpipe 5.The loosening wind of this U type on-mechanical loop seal 8 and fluidized wind can be provided by roots blower independently, keep 2-3 rice material level in the standpipe 5, to isolate methane gas and outside air in the stove, the material level of standpipe 5 can be adjusted by the air quantity of regulating adjustable type ash ejector 2 baffle openings and fluidized wind.Semicoke enters semicoke storage warehouse 9 behind U type on-mechanical loop seal (returning charge valve) 8, export a pot stove Give material system to through belt conveyor 10 again.
Claims (5)
1. dry decoking process for shale oil extracting furnace, 200～300 ℃ of semicokes of temperature from the discharge of gas retort (1) bottom ash discharging hole, through adjustable type ash ejector (2), with the micro-spray cooling to 50 of spray desuperheating device (3)～200 ℃, enter sealed crusher (4) then, described semicoke enters in the standpipe (5) behind sealed crusher in crushing to 0～8mm, the following on-mechanical formula loop seal (8) that connects of standpipe (5); Keep 2-3 rice material level in the standpipe (5), to isolate methane gas and outside air in the stove; The pressure of the inflation inlet (7) of the baffle opening that the material level of standpipe (5) can be by regulating adjustable type ash ejector (2) or the rotating speed of conical rotary ash ejector and on-mechanical formula loop seal is adjusted; Semicoke after the fragmentation enters semicoke storage warehouse (9) behind on-mechanical formula loop seal (8), export the boiler feeding system to through belt conveyor (10) again.
2. technology according to claim 1, its described gas retort (1) is selected from Chinese Fushun type retort, Brazilian Pei Teluosekesi gas retort or Estonia's Abel Kiviat gas retort.
3. technology according to claim 1, its described on-mechanical formula loop seal (8) is selected from the L shaped valve or the U-shaped valve of circulating fluidized bed, so that the semicoke of pulverizing is transported to semicoke storage warehouse (9), on-mechanical formula loop seal (8) adopts gas to promote the solid particulate motion.
4. technology according to claim 1, its described sealed crusher (4) are selected from jaw crusher, ring is beaten formula crusher or impact breaker, and top is provided with opening for feed, and the bottom is provided with discharge port.
5. technology according to claim 1, its described adjustable type ash ejector (2) are the rotary ash ejector of low speed, and this ash ejector external diameter is than the little 160～200mm of gas retort ash discharging hole internal diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610163235 CN100545236C (en) | 2006-12-08 | 2006-12-08 | Dry decoking process for shale oil extracting furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610163235 CN100545236C (en) | 2006-12-08 | 2006-12-08 | Dry decoking process for shale oil extracting furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1986733A CN1986733A (en) | 2007-06-27 |
| CN100545236C true CN100545236C (en) | 2009-09-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610163235 Expired - Fee Related CN100545236C (en) | 2006-12-08 | 2006-12-08 | Dry decoking process for shale oil extracting furnace |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101649215B (en) * | 2009-08-18 | 2012-11-07 | 吴启成 | Hot carrier preparing and heating device in externally-fired oil shale distillation process |
| CN101864322B (en) * | 2010-05-26 | 2012-12-19 | 东北电力大学 | Dry-type decoking method of oil shale gas retort with screw conveying structure |
| US9222314B2 (en) * | 2013-01-28 | 2015-12-29 | Vallourec Drilling Products Usa, Inc. | Shale drill pipe |
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2006
- 2006-12-08 CN CN 200610163235 patent/CN100545236C/en not_active Expired - Fee Related
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| CN1986733A (en) | 2007-06-27 |
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Granted publication date: 20090930 Termination date: 20111208 |