CN201899968U - Oil gas recovery device combining condensation method with adsorption method - Google Patents
Oil gas recovery device combining condensation method with adsorption method Download PDFInfo
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- CN201899968U CN201899968U CN201020569563XU CN201020569563U CN201899968U CN 201899968 U CN201899968 U CN 201899968U CN 201020569563X U CN201020569563X U CN 201020569563XU CN 201020569563 U CN201020569563 U CN 201020569563U CN 201899968 U CN201899968 U CN 201899968U
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Abstract
The utility model relates to an oil gas recovery device combining a condensation method with an adsorption method, which comprises an adsorption tower. The adsorption tower is provided with an upper filler section and a lower filler section. A condenser is arranged and comprises an oil gas condensation chamber and a poor absorbent cooling chamber. An oil gas source pipeline is communicated with the oil gas condensation chamber. A gas-phase outlet pipeline of the oil gas condensation chamber is communicated with the bottom of the lower filler section of the adsorption tower. Two poor absorbent pipelines are arranged. One poor absorbent pipeline is communicated to the poor absorbent cooling chamber of the condenser through a circulating water cooler, and the other poor absorbent pipeline is communicated to the top of the lower filler section of the adsorption tower. An output pipeline of the poor absorbent cooling chamber is communicated to the top of the upper filler section of the adsorption tower. The upper filler section and the lower filler section of the adsorption tower are communicated. The top of the adsorption tower is provided with a gas discharge pipeline. The bottom of the adsorption tower is provided with a rich absorbent discharge pipeline. Therefore, the device has high oil gas recovery efficiency; the concentration of a hydrocarbon component in tail gas is lower than the concentration required by the environmental-friendly regulation; and all energy inside the device is sufficiently utilized so as to save energy.
Description
Technical field
The utility model relates to the device for recovering oil and gas that a kind of condensation method combines with absorption process.
Background technology
Oil product exists great evaporating loss in storage, transportation and sales process, on the one hand environment is caused severe contamination, therefore caused the significant wastage of the energy on the other hand, along with the increasingly stringent of environmental regulation in recent years, the oil gas recovery technology has obtained common concern.
Existing oil-gas recovery method has absorption method, absorption process, condensation method and membrane separation process etc., and wherein absorption process and condensation method are two kinds of simple and received oil-gas recovery methods.Condensation method be with oil gas directly cooling become liquid and reclaim, the advantage of this method is that technological principle is simple, shortcoming is if will make the tail gas qualified discharge, oil gas need be cooled to low-down temperature, energy consumption is higher; Absorption process is that oil gas is contacted with suitable absorbent, light hydrocarbon component in the gas is dissolved in the absorbent, make the tail gas qualified discharge, this method is divided into the normal pressure and temperature absorption again and atmospheric low-temperature absorbs two kinds of methods, the normal pressure and temperature absorption process makes to be absorbed under the normal temperature and pressure conditions carries out, this method technological process is simple, investment and running expense are low, but the oil gas recovering effect is poor, hydrocarbon concentration can not satisfy the requirement of environmental regulation in the tail gas, the atmospheric low-temperature absorption process is to use refrigeration system that absorbent is cooled to low temperature and delivers to the absorption tower and absorb lighter hydrocarbons in the oil gas, this method oil gas recovery rate is higher, can reach different assimilation effects by controlling different absorption temperature, but if use separately this method make tail gas can qualified discharge then energy consumption is higher, very uneconomical, therefore a lot of patents or document have proposed the group technology with condensation method and absorption process.
CN200943812 proposes the device for recovering oil and gas that a kind of pressurization, condensation, spray combine, this device is provided with three absorption towers and carries out three grades of absorptions, one table oil air compressor gives device external oil gas pressurization, make it cryogenic condensation then, the shortcoming of this device is technological process complexity, equipment investment height, energy consumption height, poor stability, is difficult to long-term operation.
Summary of the invention
Low and the high shortcoming of condensation method oil gas recovery energy consumption at the absorption process oil gas recovery rate, the device for recovering oil and gas that the utility model provides a kind of condensation method to combine with absorption process, can improve oil gas recovery rate on the one hand, make hydro carbons concentration in the tail gas satisfy the requirement of environmental regulation, reduce the energy consumption of device for recovering oil and gas on the other hand.
The device for recovering oil and gas that the utility model condensation method combines with absorption process, comprise the absorption tower, the absorption tower is set to packing section and following packing section two parts, condenser is set, condenser comprises oil gas condensation chamber and poor absorbent cooling chamber, the Oil-gas source pipeline communicates with the oil gas condensation chamber, the bottom of packing section is connected under oil gas condensation chamber gaseous phase outlet pipeline and the absorption tower, poor absorbent pipeline is divided into two-way, one tunnel process water recirculator is communicated to the cooling chamber of the poor absorbent of condenser, another road is communicated to the top of packing section under the absorption tower, poor absorbent cooling chamber outlet line is communicated to the top of packing section on the absorption tower, be connectivity structure between packing section and the following packing section on the absorption tower, the top, absorption tower is provided with the gas discharge pipe road, and the rich absorbent discharge line is established in the bottom, absorption tower.
In the utility model device, condenser is communicated with the cold-producing medium of refrigeration system, and the refrigerant line of refrigeration system is cold oil gas condensation chamber at first, cools off poor absorbent cooling chamber then.Oil gas condensation chamber bottom is provided with the condensate discharge pipeline.
In the utility model device, two packing section in the absorption tower can be used conventional filler, and as being Raschig ring, Pall ring etc., the height of two packing section can be identical, also can be different, determine according to oil gas composition and absorbent character etc. are concrete.Poor absorbent can be distillates such as kerosene, diesel oil, also can be special-purpose absorbent.
In the utility model, adopt dividing plate to separate between poor absorbent cooling chamber and the oil gas condensation chamber.Poor absorbent temperature through poor absorbent cooling chamber is 4～12 ℃.Oil gas temperature through the oil gas condensation chamber is-5～10 ℃.
The device for recovering oil and gas that this condensation method combines with absorption process has following advantage:
1, the oil gas absorption tower is divided into two sections: the first absorption tower section and the second absorption tower section, wherein the first absorption tower section utilizes the poor absorbent of normal temperature to make absorbent, the second absorption tower section utilizes the poor absorbent of low temperature to make absorbent, recovery of normal temperature oil gas and low temperature oil gas are reclaimed reasonable combination be in the same place, help improving oil gas recovery rate.
2, oil gas can be with about 80% oil gas recovery rate by the normal temperature absorption of the first absorption tower section, since do not need to control the discharging gas in hydro carbons concentration in very low level, liquid-gas ratio can be very little, be that the required used absorption oil mass of absorption oil amount ratio normal temperature oil gas recovery is wanted much less, help cutting down the consumption of energy.
3, with the additional absorption means of low temperature absorption tower section as normal temperature absorption tower section, help tail gas concentration is controlled at the horizontal drain of reduction, compare the advantage that has the secondary pollution of not forming and do not need desorption and regeneration with utilizing active carbon adsorption control tail gas concentration.
4, fully taking into account the oil gas absorption process is exothermic process, therefore poor absorbent of part and oil gas sub-cooled, condensation have all been carried out, can improve oil gas recovery rate like this, but if whole poor absorbents are all carried out sub-cooled, then energy consumption is higher, uneconomical, so this method just carries out sub-cooled with the poor absorbent of part, greatly reduces energy consumption.
5, with the rich absorbent of the second absorption tower section cat head spray liquid as the first absorption tower section, can increase the liquid-gas ratio of the first absorption tower section on the one hand, the oil gas that improves the first absorption tower section is on the other hand because the reduction of the rich absorbent temperature of the first absorption tower section, be introduced into first absorption tower and can give the cooling of first absorption tower, thereby suppress the decline of the first absorption tower oil gas recovery rate.
Description of drawings
Fig. 1 is the flow chart of the device for recovering oil and gas that combines with absorption process of this condensation method.
Wherein: the external poor absorbent of 1-device, the 2-water cooler, the external oil gas of 3-device, the 4-condenser, the poor absorbent cooling chamber of 5-, 6-oil gas condensation chamber, the uncooled oil gas of 7-, 8-condensate liquid, 9-be through the poor absorbent of the low temperature of supercooling, the 10-second absorption tower section, the 11-first absorption tower section tower top discharge tracheae line, the 12-second absorption tower section rich absorbent to the first absorbs overhead line, the 13-first absorption tower cat head spray liquid, the 14-first absorption tower section, 15-liquid storage section, 16-rich absorbent pump, the 17-rich absorbent goes out the device pipeline, 18-exhaust emissions pipeline.
The specific embodiment
Further specify the structure and the using method of the utility model device below in conjunction with accompanying drawing.
The device for recovering oil and gas that a kind of condensation method of the utility model combines with absorption process, this method is divided into first absorption tower (being the following packing section on absorption tower) and second absorption tower (being the last packing section on absorption tower) two tower sections with the oil gas absorption tower, wherein carry out under normal pressure and temperature on first absorption tower, and carry out under atmospheric low-temperature on second absorption tower.Because the first absorption tower section does not need the content of hydrocarbon component in the strict control tail gas, therefore liquid-gas ratio can be very low, reduced energy consumption, second absorbs tower top discharge gas then wants strict control hydro carbons concentration, this moment, poor absorbent was selected the poor absorbent through the condenser cooling, can make to have reduced poor absorbent consumption when the strictness of hydro carbons concentration is up to standard in the tail gas.
Concrete structure is as follows: be divided into two-way after installing external poor absorbent pipeline motion device certainly, one the tunnel through the cat head spray liquid as the first absorption tower section, another road enters the poor absorbent cooling chamber of condenser after through water cooler cooling, is cooled to behind the low temperature cat head spray liquid as the second absorption tower section; Enter the oil gas condensation chamber of condenser from the external oil gas of device, condensate liquid goes out device, uncooled oil gas enters at the bottom of the tower of the first absorption tower section, in the first absorption tower section, carry out reverse the contact with spray liquid, make the most of hydro carbons in the oil gas be absorbed tower, discharging gas enters at the bottom of the tower of the second absorption tower section, with in second absorption tower, contact absorption through spray liquid, whole hydrocarbon components residual in the oil gas are absorbed, discharging gas discharges through pipeline, rich absorbent is as the cat head spray liquid of the first absorption tower section, and rich absorbent utilizes rich oil pump withdrawing device at the bottom of the tower of the first absorption tower section.
In the utility model, the content of hydrocarbon component is between 10%-50% (Vol) in the oil gas.
In the utility model, installing external poor absorbent temperature certainly is 30-40 ℃.
In the utility model, condenser is inner to be middle two chambers that separate with dividing plate, poor absorbent cooling chamber and oil gas condensation chamber, and wherein the top is poor absorbent cooling chamber, and the below is the oil gas condensation chamber, and each is indoor to be shell and tube cold-producing medium heat exchange tube structure.
In the utility model, poor absorbent utilizes the condenser heat exchange to be cooled to 4-10 ℃, preferred 4 ℃, this moment, the oil gas under uncooled entered the absorption tower with lower temperature in the oil gas condensation chamber of condenser, help improving oil gas recovery rate and reduce liquid-gas ratio, and the poor absorbent in the condenser is made the poor absorbent on second absorption tower through the back that cools in cooling chamber, can strict control tail gas in hydro carbons concentration in lower level, can be far below the requirement of environmental regulation.
In the utility model, the liquid-gas ratio on first absorption tower is 18-35L/m
3The rich absorption liquid on first absorption tower can all or part of cat head spray liquid as second absorption tower, because the rich absorbent temperature on second absorption tower is lower, be introduced into second absorption tower on the one hand by improving the oil gas absorptivity for the cooling of first absorption tower, should only absorb small part oil gas by the richness absorption liquid on the other hand, absorbing oil is far from reaching capacity, also have the certain absorption effect, absorb the cat head spray liquid as first and then can play the effect of the oil gas in first absorption tower being assisted absorption.
Embodiment
Further specify for the result of use of condensation method described in the utility model and absorption process device for recovering oil and gas below in conjunction with embodiment, but be not subjected to the restriction of following embodiment.What present embodiment adopted is the analog computation that PRO II software carries out, used oil gas form see Table 1, poor absorbent boiling range sees Table 2, operating condition sees Table 5, assimilation effect sees Table 6.
From the analog computation result as can be seen, very high by the oil gas recovery rate after this device for recovering oil and gas processing, can reach about 99%, and the absorption of each absorption tower section oil consumption is lower, saves the energy.
Table 1 oil gas is formed (volume fraction)/%
| C 1 | C 2 | C 3 | C 3 ＝ | iC 4 | nC 4 | 1-C 4 ＝ | i-C 4 ＝ |
| 0.04 | 0.22 | 0.02 | 2.14 | 5.58 | 1.31 | 0.75 | 0.45 |
| t-2-C 4 ＝ | c-2-C 4 ＝ | i-C 5 | n-C 5 | ∑C 5 ＝ | C 5 + | ∑HC |
| 0.71 | 0.89 | 0.87 | 10.83 | 1.42 | 5.44 | 30.67 |
The poor absorbent character of table 2
| Project | |
| Density (20 ℃)/kgm -3 | 844.1 |
| Boiling range/℃ | |
| IBP/10％/50％ | 200/218/257 |
| /90％/EBP | /328/350 |
Table 3 operating condition
| Oil gas reclaimer operation condition | |
| Oil and gas content, m 3/h | 200 |
| The first absorption tower section absorbs oil mass, m
3/ |
6 |
| The first absorption tower section absorbs oil temperature, ℃ | 23 |
| The second absorption tower section absorbs oil mass, m
3/ |
6 |
| The second absorption tower section absorbs oil temperature, ℃ | 4 |
Table 4 oil gas recovery rate/%
| Oil gas recovery rate | |
| The first absorption tower section | 82％ |
| The second absorption tower section | 99％ |
Claims (8)
1. device for recovering oil and gas that condensation method combines with absorption process, comprise the absorption tower, it is characterized in that: the absorption tower is set to packing section and following packing section two parts, condenser is set, condenser comprises oil gas condensation chamber and poor absorbent cooling chamber, the Oil-gas source pipeline communicates with the oil gas condensation chamber, the bottom of packing section is connected under oil gas condensation chamber gaseous phase outlet pipeline and the absorption tower, poor absorbent pipeline is divided into two-way, one tunnel process water recirculator is communicated to the cooling chamber of the poor absorbent of condenser, another road is communicated to the top of packing section under the absorption tower, poor absorbent cooling chamber outlet line is communicated to the top of packing section on the absorption tower, be connectivity structure between packing section and the following packing section on the absorption tower, the top, absorption tower is provided with the gas discharge pipe road, and the rich absorbent discharge line is established in the bottom, absorption tower.
2. according to the described device of claim 1, it is characterized in that: condenser is communicated with the cold-producing medium of refrigeration system, and the refrigerant line of refrigeration system is cold oil gas condensation chamber at first, cools off poor absorbent cooling chamber then.
3. according to the described device of claim 1, it is characterized in that: oil gas condensation chamber bottom is provided with the condensate discharge pipeline.
4. according to the described device of claim 1, it is characterized in that: the filler that two packing section in the absorption tower are used is Raschig ring or Pall ring.
5. according to the described device of claim 1, it is characterized in that: poor absorbent is kerosene, diesel oil or special-purpose absorbent.
6. according to claim 1 or 2 described devices, it is characterized in that: adopt dividing plate to separate between poor absorbent cooling chamber and the oil gas condensation chamber.
7. according to claim 1 or 2 described devices, it is characterized in that: the poor absorbent temperature through poor absorbent cooling chamber is 4～12 ℃.
8. according to claim 1 or 2 described devices, it is characterized in that: the oil gas temperature through the oil gas condensation chamber is-5～10 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020569563XU CN201899968U (en) | 2010-10-14 | 2010-10-14 | Oil gas recovery device combining condensation method with adsorption method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020569563XU CN201899968U (en) | 2010-10-14 | 2010-10-14 | Oil gas recovery device combining condensation method with adsorption method |
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| CN201899968U true CN201899968U (en) | 2011-07-20 |
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| CN201020569563XU Expired - Lifetime CN201899968U (en) | 2010-10-14 | 2010-10-14 | Oil gas recovery device combining condensation method with adsorption method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626558A (en) * | 2012-04-24 | 2012-08-08 | 江苏亚宝绝缘材料股份有限公司 | Tail gas recovery in polyimide film production process |
| CN104083982A (en) * | 2014-07-15 | 2014-10-08 | 南京大学 | Method for absorbing and recycling medium-high-concentration organic solvent |
| CN104128063B (en) * | 2014-07-29 | 2017-01-18 | 神华集团有限责任公司 | Device and method for recovery of olefin monomer in tail gas from polypropylene production |
| CN114931763A (en) * | 2022-06-02 | 2022-08-23 | 杭州鼎玺智能技术有限公司 | Efficient and economical online oil gas recovery monitoring system |
-
2010
- 2010-10-14 CN CN201020569563XU patent/CN201899968U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102626558A (en) * | 2012-04-24 | 2012-08-08 | 江苏亚宝绝缘材料股份有限公司 | Tail gas recovery in polyimide film production process |
| CN102626558B (en) * | 2012-04-24 | 2015-03-04 | 江苏亚宝绝缘材料股份有限公司 | Tail gas recovery in polyimide film production process |
| CN104083982A (en) * | 2014-07-15 | 2014-10-08 | 南京大学 | Method for absorbing and recycling medium-high-concentration organic solvent |
| CN104128063B (en) * | 2014-07-29 | 2017-01-18 | 神华集团有限责任公司 | Device and method for recovery of olefin monomer in tail gas from polypropylene production |
| CN114931763A (en) * | 2022-06-02 | 2022-08-23 | 杭州鼎玺智能技术有限公司 | Efficient and economical online oil gas recovery monitoring system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110720 |