CN103497788B - The method of oily substance and device in a kind of gas recovery - Google Patents
The method of oily substance and device in a kind of gas recovery Download PDFInfo
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- CN103497788B CN103497788B CN201310398196.XA CN201310398196A CN103497788B CN 103497788 B CN103497788 B CN 103497788B CN 201310398196 A CN201310398196 A CN 201310398196A CN 103497788 B CN103497788 B CN 103497788B
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Abstract
In gas recovery, the method for oils and a device, comprise gas washing system, cooling recovery system and tail oil recovery system.Gas washing system comprises washing liquid pump and knockout tower; Cooling recovery system comprises elementary tubular cooler, elementary gas-liquid separator, secondary tubular cooler, secondary gas-liquid separator and refrigerant fluid recycle pump; Tail oil recovery system comprises tail oil withdrawing can.The present invention, by stage trapping, segmentation recovery and cycle refrigerating method, reaches and reclaims the coal-tar middle oil object of raw gas, have operating process simple, and facility investment, working cost are few, and the tar rate of recovery is high, consumes the technical superioritys such as low, energy-conserving and environment-protective.
Description
Technical field
The present invention relates to the method and device that reclaim oils, be specifically related to method and the device of oily substance in a kind of gas recovery.
Background technology
North Shaanxi Province of China area has abundant coal resources, coal expected reserves 2,714 hundred million tons, proven reserve 1,660 hundred million tons, is the third-largest coal base of China.The coal of this area is the coal being rich in oil, and oil-contg is up to 8 ~ 10%, and be applicable to producing coal tar, the main at present coal tar production technology in North Shaanxi carries out low-temperature pyrolysis by internal heat type block furnace to feed coal, then reclaims the tar in coal gas.
At present, what the coal-tar middle oil recovery of major part low-temperature pyrolysis stove discharged producer gas still adopted is conventional tar recovery method, namely discharged producer gas first sprays cooling with recirculated water, make tar and water condensation, then obtain tar by oily water separation, the coal gas after washing enters electrical tar precipitator and removes oils in coal gas further.The mode of this washing cooling needs to consume a large amount of water resourcess, and focusing oil recovery efficiency is very low, and existing tar way of recycling cannot operate under an increased pressure.
In addition, be liquid lower boiling hydrocarbon polymer under a part of normal temperature, cannot all condensations, also all cannot be trapped by electrical tar precipitator, this part oils work is taken out of by dry distillation gas with gas phase, and this part is commonly called as " light oil " by the oil product that coal gas is taken out of.Being rich in the organic compound of multiple high added value in " light oil ", is the important source material of Organic Chemical Industry, has very high utility value.
Summary of the invention
The object of the invention is to the shortcoming overcoming above-mentioned prior art, method and the device of oils in a kind of gas recovery are provided.
For achieving the above object, the inventive system comprises gas washing system, cooling recovery system and tail oil recovery system;
Described gas washing system comprises the knockout tower with oil-containing gas entry, offers the washings entrance be connected with washings in knockout tower upper end;
Described cooling recovery system comprises and exports with knockout tower the water cooler be connected, and the outlet of water cooler is connected with flow separator;
Described tail oil recovery system comprises the tail oil withdrawing can be connected with separator outlet, and the pneumatic outlet of tail oil withdrawing can discharges purification coal gas.
Described washings adopts water, ammoniacal liquor or oils, and is also provided with washing liquid pump between washings and washings entrance.
The working pressure of described knockout tower is 0.001 ~ 5.0MPa.
Described cooling recovery system comprises elementary tubular cooler, and the outlet of elementary tubular cooler is connected with elementary gas-liquid separator, secondary tubular cooler, secondary gas-liquid separator successively; The refrigerant fluid circulation pump outlet be communicated with circularly cooling liquid phase is connected with secondary tubular cooler, elementary tubular cooler successively, and the outlet of elementary tubular cooler 5 is communicated with circularly cooling liquid phase by the road.
Described elementary tubular cooler and secondary tubular cooler are coil tube type, coil pipe type, shell and tube and one or more combination wherein.
Described tail oil withdrawing can is plank frame and filling-material structure.
Described circularly cooling liquid is mixture that is a kind of in water, salt solution, ethanol, ethylene glycol or its arbitrary proportion.
In gas recovery of the present invention, the method for oily substance is as follows:
Enter knockout tower lower end containing oil gas as unstripped gas, washings after metering by washings pump delivery to knockout tower upper end, through countercurrent washing in tower, most oils is reclaimed by washings, and the unstripped gas carrying remaining oils secretly enters cooling recovery system;
In cooling recovery system, first the coal gas carrying remaining oils secretly enter the cooling of elementary tubular cooler, enters elementary gas-liquid separator subsequently and carry out gas-oil separation, recovery part oils; Coal gas after separation continues to enter secondary tubular cooler and cools, and enters secondary gas-liquid separator subsequently and is separated, recovery part oils;
Coal gas after separation continues to enter tail oil withdrawing can, reclaims rear discharge purification coal gas to remaining oils last in coal gas;
In circularly cooling process, first circularly cooling liquid input in secondary tubular cooler through refrigerant fluid recycle pump, enters in elementary tubular cooler subsequently, uses through two-stage refrigeration Posterior circle.
The described temperature containing oil gas is 350 DEG C ~ 850 DEG C.
The temperature of described circularly cooling liquid is-40 DEG C ~ 25 DEG C.
The present invention, by stage trapping, segmentation recovery and cycle refrigerating method, reaches and reclaims the coal-tar middle oil object of raw gas, have operating process simple, and facility investment, working cost are few, and the tar rate of recovery is high, consumes the technical superioritys such as low, energy-conserving and environment-protective.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
In figure: 1, secondary tubular cooler 8, secondary gas-liquid separator 9, tail oil withdrawing can 10 other 7 containing oil gas 2 washings 3, washing liquid pump 4, knockout tower 5, elementary tubular cooler 6, elementary gas-liquid separator, purification coal gas 11, circularly cooling liquid 12, refrigerant fluid recycle pump
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
See Fig. 1, the inventive system comprises gas washing system, cooling recovery system and tail oil recovery system.
Described gas washing system comprises washings 2, washing liquid pump 3 and knockout tower 4, and the outlet of washing liquid pump 3 is connected with knockout tower 4;
Described cooling recovery system comprises and exports with knockout tower 4 the elementary tubular cooler 5 be connected, and the outlet of elementary tubular cooler 5 is connected with elementary gas-liquid separator 6, secondary tubular cooler 7, secondary gas-liquid separator 8 successively; The outlet of the refrigerant fluid recycle pump 12 be connected with circularly cooling liquid 11 is connected with secondary tubular cooler 7, elementary tubular cooler 5 successively;
Described tail oil recovery system comprises and exports with secondary gas-liquid separator 8 the tail oil withdrawing can 9 be connected.
Described washings 2 comprises water, ammoniacal liquor and oils.
The working pressure of described knockout tower 4 is 0.001 ~ 5.0MPa.
Described elementary tubular cooler 5 and secondary tubular cooler 7 are coil tube type, coil pipe type, shell and tube and one or more combination wherein.
Described tail oil withdrawing can 9 is plank frame and filling-material structure.
Described circularly cooling liquid 11 is water, salt solution, ethanol, ethylene glycol any one or more mixture wherein.
Method of the present invention is as follows:
Temperature is that the oil gas 1 that contains of 350 DEG C ~ 850 DEG C enters knockout tower 4 lower end as unstripped gas, and the working pressure of knockout tower 4 is 0.001 ~ 5.0MPa.Washings 2, comprises water, ammoniacal liquor and oils, and be transported to knockout tower 4 upper end by washing liquid pump 3 after metering, through countercurrent washing in tower, most oils is reclaimed by washings 2, and the unstripped gas carrying remaining oils secretly enters cooling recovery system;
In cooling recovery system, first the coal gas carrying remaining oils secretly enter elementary tubular cooler 5 and cool, and enters elementary gas-liquid separator 6 subsequently and carry out gas-oil separation, recovery part oils; Coal gas after separation continues to enter secondary tubular cooler 7 and cools, and enters secondary gas-liquid separator 8 subsequently and is separated, recovery part oils.The structure formation of elementary tubular cooler 5 and secondary tubular cooler 7 is coil tube type, coil pipe type, shell and tube and one or more combination wherein;
Coal gas after separation continues to enter tail oil withdrawing can 9, reclaims remaining oils last in coal gas.Tail oil withdrawing can 9 is plank frame (as sieve-tray tower) and filling-material structure (as molecular sieve, activated carbon etc. or other sorbent materials);
In circularly cooling process, temperature is the circularly cooling liquid 11 of-40 DEG C ~ 25 DEG C, comprise water, salt solution, ethanol any one or more mixture wherein, first input in secondary tubular cooler 7 through refrigerant fluid recycle pump 12, enter in elementary tubular cooler 5 subsequently, use through two-stage refrigeration Posterior circle.
Claims (3)
1. the device of oily substance in gas recovery, is characterized in that: comprise gas washing system, cooling recovery system and tail oil recovery system;
Described gas washing system comprises the knockout tower (4) with oil-containing gas entry (1), offers the washings entrance be connected with washings (2) in knockout tower (4) upper end;
Described cooling recovery system comprises and exports with knockout tower (4) water cooler be connected, and the outlet of water cooler is connected with flow separator; Described cooling recovery system comprises elementary tubular cooler (5), and the outlet of elementary tubular cooler (5) is connected with elementary gas-liquid separator (6), secondary tubular cooler (7), secondary gas-liquid separator (8) successively; The outlet of the refrigerant fluid recycle pump (12) be connected with circularly cooling liquid (11) is connected with secondary tubular cooler (7), elementary tubular cooler (5) successively, and the outlet of elementary tubular cooler (5) is connected with circularly cooling liquid (11) by the road;
Described tail oil recovery system comprises the tail oil withdrawing can (9) be connected with separator outlet, and the pneumatic outlet of tail oil withdrawing can (9) discharges purification coal gas (10).
2. the method for oily substance in gas recovery, is characterized in that:
Knockout tower (4) lower end is entered as unstripped gas containing oil gas (1), washings (2) is transported to knockout tower (4) upper end by washing liquid pump (3) after metering, through countercurrent washing in tower, overwhelming majority oils is reclaimed by washings (2), and the unstripped gas carrying remaining oils secretly enters cooling recovery system;
In cooling recovery system, first the coal gas carrying remaining oils secretly enter elementary tubular cooler (5) cooling, enters elementary gas-liquid separator (6) subsequently and carry out gas-oil separation, recovery part oils; Coal gas after separation continues to enter secondary tubular cooler (7) and cools, and enters secondary gas-liquid separator (8) subsequently and is separated, recovery part oils;
Coal gas after separation continues to enter tail oil withdrawing can (9), reclaims rear discharge purification coal gas (10) to remaining oils last in coal gas;
In circularly cooling process, circularly cooling liquid (11) first inputs in secondary tubular cooler (7) through refrigerant fluid recycle pump (12), enter in elementary tubular cooler (5) subsequently, use through two-stage refrigeration Posterior circle.
3. the method for oily substance in gas recovery according to claim 2, it is characterized in that, the temperature of described circularly cooling liquid (11) is-40 DEG C ~ 25 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310398196.XA CN103497788B (en) | 2013-09-04 | 2013-09-04 | The method of oily substance and device in a kind of gas recovery |
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| CN201310398196.XA CN103497788B (en) | 2013-09-04 | 2013-09-04 | The method of oily substance and device in a kind of gas recovery |
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| CN103497788A CN103497788A (en) | 2014-01-08 |
| CN103497788B true CN103497788B (en) | 2016-01-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104629817B (en) * | 2015-01-30 | 2017-06-06 | 上海尧兴投资管理有限公司 | Light oil reclaims and extracts the method and device of regenerated methanol |
| CN105779028B (en) * | 2016-04-07 | 2019-04-19 | 青岛科大隆腾科技发展有限公司 | Raw coke oven gas heat and change based on washing rectifying produce the method recycled simultaneously |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1054866A (en) * | 1900-01-01 | |||
| CN101870882A (en) * | 2010-04-28 | 2010-10-27 | 大庆油田有限责任公司 | Shale oil condensation recycling water-washing process system and operation method |
| CN202148287U (en) * | 2011-07-11 | 2012-02-22 | 贝洪毅 | Biomass dry distillation carbon, gas, oil and liquid co-production centralized gas supply system |
| CN102585919A (en) * | 2012-03-06 | 2012-07-18 | 宁夏三友环保设备制造有限公司 | Combined type gas dry-decoking condensing unit |
-
2013
- 2013-09-04 CN CN201310398196.XA patent/CN103497788B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1054866A (en) * | 1900-01-01 | |||
| CN101870882A (en) * | 2010-04-28 | 2010-10-27 | 大庆油田有限责任公司 | Shale oil condensation recycling water-washing process system and operation method |
| CN202148287U (en) * | 2011-07-11 | 2012-02-22 | 贝洪毅 | Biomass dry distillation carbon, gas, oil and liquid co-production centralized gas supply system |
| CN102585919A (en) * | 2012-03-06 | 2012-07-18 | 宁夏三友环保设备制造有限公司 | Combined type gas dry-decoking condensing unit |
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| CN103497788A (en) | 2014-01-08 |
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