CN202440471U - Oil gas recovery system - Google Patents
Oil gas recovery system Download PDFInfo
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- CN202440471U CN202440471U CN 201120555660 CN201120555660U CN202440471U CN 202440471 U CN202440471 U CN 202440471U CN 201120555660 CN201120555660 CN 201120555660 CN 201120555660 U CN201120555660 U CN 201120555660U CN 202440471 U CN202440471 U CN 202440471U
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Abstract
The utility model relates to a recovery system used for hydrocarbons and other volatilizable organic matters in oil refinery, chemical plants, large-scale oil depots, gas stations and other places. An air outlet at the top end of an absorption tower is communicated with air passageways at the bottom ends of activated carbon adsorption towers, the activated carbon adsorption towers are connected in parallel, the passageways at the bottom ends of the activated carbon adsorption towers are communicated with a heat exchanger, an oil-water separator and a storage tank in series in sequence, and an air outlet of the oil-water separator is communicated with an air inlet of the absorption tower; a liquid outlet at the bottom end of the absorption tower is communicated with a liquid inlet at the top end of a desorption tower, a liquid outlet at the bottom end of the desorption tower is communicated with a liquid inlet of a solvent storage tank, and a liquid outlet at the bottom end of the solvent storage tank is communicated with a liquid inlet at the top end of the absorption tower; and a gas outlet at the top end of the desorption tower is communicated with the heat exchanger, a condensate tank, a gas-liquid separator and the storage tank in series, and an air outlet of the gas-liquid separator is communicated with the air inlet of the absorption tower. The recovery system provided by the utility model has the characteristics of low investment, long cycle of operation, high oil gas recovery rate and simple process flow.
Description
Technical field
The utility model relates to a kind of gas recovery system for oil, particularly relates to a kind of hydro carbons on ground such as refinery, chemical plant, large-scale oil depot and service station and recovery system of other volatile organic matter of being used for.
Background technology
Industry such as oil refining, chemical industry, medicine and the refueling facility that spreads all over the world are the important sources of volatile organic pollutant (abbreviation oil gas); Along with the production-scale continuous expansion of petrochemical industry; This pollutant is on the rise to the destruction of atmospheric environment, thereby country is strict more to the requirement of oil gas recycling.No matter current is to build Petrochemical Projects or existing apparatus, and the oil gas recvery facility has become the necessary integral part of whole device.Some companies develop corresponding device thereof to different pollutent compositions in recent years, and its technical process is different, in accommodation separately, all obtains the effect that is satisfied in the main.Oil gas reclaims sophisticated technology and mainly contains: absorption, freezing type, adsorption type and with multiple unitary combination, and adsorption type comprises vacuum desorption and adds two kinds of schemes of thermal desorption, is to promote technology faster at present.Yet with regard to its main performance index, investment, accommodation and system stability, all there is certain limitation.Can not long-term operation like, the process system that has, system stability is poor, and oil gas recovery rate is low, and energy consumption is high, and investment cost is high, restricted application.
Granted publication number is the utility model patent of CN201899968U, discloses the device for recovering oil and gas that a kind of condensation method combines with absorption process, and oil gas recovery rate is higher; Can reach about 99%; The absorption agent consumption on absorption tower is low, save the energy, but absorption agent needs condensing surface heat exchange condensation; Increased system energy consumption to a certain extent, and this retrieving arrangement does not contain desorption process.
Granted publication number is the utility model patent of CN200943812Y; The device for recovering oil and gas that a kind of pressurization, condensation, spray combine is disclosed; This device is provided with three absorption towers and carries out three grades of absorptions; Earlier with external oil gas pressurization, make it cryogenic condensation with compressor then, technical process is complicated, energy consumption is higher, be difficult to long-term operation.
Publication number is that CN101015760A was the patented claim of 2007.8.15 in open day, discloses a kind of oil-gas recovery method and device that absorbs adsorbing integration technology, and this method and plant energy consumption are higher.Publication number is open day of 101185825A to be the patented claim of 2008.5.28; Disclose the integrated technique of a kind of absorption process and membrane separation process, whole oil gas removal process can be divided into four parts, the absorption tower with the oil gas absorption extraction, separate the cucurbitula desorb and concentrate, further utilize membrane sepn, absorption tower to absorb to reclaim; Oil gas recovery rate can reach more than 99%; But this technical process is too complicated, and facility investment and running expense are also bigger, and cost is higher.
Granted publication number suppresses normal temperature and pressure method oil gas recovery rate and descends for the patent of CN201899966U discloses a kind of jacketed type device for recovering oil and gas and method, improves oil gas recovery rate.The absorption tower is a jacketed type in this utility model, and chuck is contained in the outside, absorption tower, between chuck and wall, forms airtight space, becomes the passage of flow of refrigerant.This device makes absorption tower oil gas specific absorption at normal temperatures and pressures higher, has saved equipment such as interchanger, has reduced facility investment, still, when refrigerant temperature is higher, needs to strengthen the flow of refrigeration agent or the cooling processing of stopping work.
The utility model content
The technical problem that the utility model will solve provides that a kind of investment is less, the equipment cycle of operation is long, high, the simple gas recovery system for oil of technical process of oil gas recovery rate.
For reaching above-mentioned purpose, a kind of gas recovery system for oil of the utility model comprises solvent tank, absorption tower, two activated carbon adsorbers and desorption tower; Air outlet, top, absorption tower and activated carbon adsorber bottom gas inlet-outlet are communicated with; Be connected in parallel between the activated carbon adsorber; Gangway, activated carbon adsorber bottom is communicated with interchanger, water-and-oil separator, storage tank series connection successively, and the air outlet of water-and-oil separator and the inlet mouth on absorption tower are communicated with; The fluid inlet of bottom, absorption tower liquid outlet and desorb cat head end is communicated with, and the fluid inlet of desorption tower bottom liquid outlet and solvent tank is communicated with, and solvent tank bottom liquid outlet and top, absorption tower fluid inlet are communicated with; The vertical air outlet of desorption tower is communicated with interchanger, lime set jar, gas-liquid separator, storage tank series connection successively, and the air outlet of gas-liquid separator and the inlet mouth on absorption tower are communicated with.
Gangway, wherein said activated carbon adsorber bottom is meant the gangway of the supplied gas turnover of setting, and when adsorption tower was in adsorbed state, gas advanced top ports from lower port and goes out; When adsorption tower was in detachment status, gas then advanced lower port from top ports and goes out.
The utility model gas recovery system for oil wherein also preferably is provided with surge tank, and the inlet mouth on said absorption tower and the air outlet of surge tank are communicated with, and promptly the oil gas in the oil and gas pipes is isolated through surge tank earlier and got into the absorption tower again behind a part of oil product and use solvent absorbing.The air outlet of said water-and-oil separator is communicated with through the inlet mouth on said surge tank and absorption tower; Promptly when being provided with surge tank, the gas in the water-and-oil separator (containing some hydrocarbon liquids) is isolated through surge tank earlier and is got into the absorption tower again behind a part of oil product and use solvent absorbing.
The utility model gas recovery system for oil; Said activated carbon adsorber top gas inlet-outlet also is communicated with the LP steam pipeline; Be that LP steam is that the desorption of gac provides thermal source; The utility model adopts the steam heating desorption to replace vacuum desorption, and desorption efficient improves, and the active adsorption ability of gac increases.
Two parallelly connected alternations of activated carbon adsorber, wherein one is in the absorption working order, and another carries out steam heating desorption or air purge cooling or is in stand-by state, has prolonged the cycle of operation of adsorption tower.Oil gas is removed most of organism through the absorption tower earlier and is got into activated carbon adsorber again, and the volatilizable organic content in the oil gas significantly reduces, and the cycle of operation of adsorption tower is further prolonged; Instrument, the equipment performance of having avoided frequent switching to cause descend; Prolonged equipment life, and the cycle of operation prolongs, especially when temperature is low; Advantage more obviously (when temperature is low in the oil gas organic content low, thereby effectively reduce machine utilization).The volume of adsorption tower and the sorbent material consumption is corresponding reduces meanwhile; And the type selecting of gac is more flexible, owing to adopt degree of depth separating process, can select for use specific surface area less; The gac that the aperture is bigger; Most of China made activated carbon all can satisfy, and need not the import activated carbon products that adopt price higher, has reduced cost of investment.
The utility model gas recovery system for oil, wherein said desorption tower bottom also is provided with heating coil, and the inlet mouth of the bottom heating coil of Analytic Tower and LP steam pipeline be communicated with, and promptly LP steam is that the desorb of solvent in the desorption tower provides thermal source.
The utility model gas recovery system for oil, wherein said desorption tower bottom also is provided with tundish, and tundish top fluid inlet and desorption tower bottom liquid outlet are communicated with, and the fluid inlet of tundish bottom liquid outlet and solvent tank is communicated with.The effect of tundish is that vacuum system and normal pressure system are isolated, and guarantees continous-stable operation in the discharging process, avoids the desorption tower pressure surge, is convenient to operation and control.
The utility model gas recovery system for oil, wherein said solvent tank bottom also is provided with water-chilling plant, and promptly the bottom is provided with spiral coil cooling tube in the solvent storage tank, and the water flowing cooling is kept solvent (diesel oil) temperature below 35 ℃.
The utility model gas recovery system for oil; Wherein the filler on preferred said absorption tower is an Intalox Saddle; This filler market is on sale, and as can be available from Qidong, Jiangsu mixing tank factory, the used filler of said desorption tower be a Mellapak packing; This filler belongs to the commercially available prod, as can be available from Qidong, Jiangsu mixing tank factory.
The utility model gas recovery system for oil is applicable to refinery; The chemical plant; The hydro carbons on ground such as large-scale oil depot or service station and the taking back and process of other volatile organic matter are particularly useful for the recycling of gasoline and " triphen " pollutents such as (benzene,toluene,xylenes).
The utility model gas recovery system for oil, the flow process of employing are solvent absorbing-charcoal absorption-Jia thermal desorption processes, with the effective integration of a plurality of unit, thereby obtain more superior performance, have improved the recovery of oil gas greatly, have prolonged the cycle of operation of equipment.In the activated carbon adsorber, the used thermal source of the desorption of gac is a LP steam, and desorption efficient improves, and the active adsorption ability of gac increases.Compare with device with existing oil-gas recovery method, the utlity model has long, high, the technical process characteristic of simple of oil gas recovery rate of less, equipment cycle of operation of investment.
Be described further below in conjunction with the gas recovery system for oil of accompanying drawing the utility model.
Description of drawings
Fig. 1 is the schematic flow sheet of the utility model gas recovery system for oil.
Description of reference numerals: 1-absorption tower; 2-first activated carbon adsorber; 3-second activated carbon adsorber; The 4-desorption tower; The 5-diesel oil tank; The 6-surge tank; 7-lime set jar; The 8-gas-liquid separator; The 9-water-and-oil separator; The 10-storage tank; The 11-interchanger; The 12-diesel oil pump; The 13-circulating oil pump; 14-sprays oil pump; 15-vacuum unit; The 16-tundish; The gas that the A-water-and-oil separator obtains; The gas that the B-gas-liquid separator obtains.
Embodiment
Below in conjunction with accompanying drawing, embodiment and testing data, do more detailed explanation with other technical characterictic and advantage to the utility model is above-mentioned.
As shown in Figure 1, the gas recovery system for oil of the utility model, used lyosorption is a diesel oil, comprises diesel oil tank 5, absorption tower 1, first activated carbon adsorber 2, second activated carbon adsorber 3 and desorption tower 4; Diesel oil tank 5 bottoms are provided with spiral coil cooling tube; Logical water coolant is cooled to diesel oil below 35 ℃, as 30-35 ℃ in the pipe; Oil and gas pipes and surge tank 6 inlet mouths are communicated with; The inlet mouth on surge tank 6 air outlets and absorption tower 1 is communicated with, and air outlet, 1 top, absorption tower and activated carbon adsorber 2,3 bottom gas inlet-outlet are communicated with, and first activated carbon adsorber 2 and second gac 3 are connected in parallel; Activated carbon adsorber 2,3 bottom gas inlet-outlet are communicated with interchanger 11, water-and-oil separator 9, storage tank 10 series connection successively, and the inlet mouth of the air outlet of water-and-oil separator 9 and surge tank 6 is communicated with; Absorption tower 1 bottom liquid outlet and desorption tower 4 vertical fluid inlets are communicated with, and the fluid inlet of desorption tower 4 bottom liquid outlets and diesel oil tank 5 is communicated with, and the bottom liquid outlet of diesel oil tank 5 is communicated with through circulating oil pump 13 and absorption tower 1 top fluid inlet; Desorption tower 4 vertical air outlets are communicated with interchanger 11, lime set jar 7, vacuum unit 15, gas-liquid separator 8, storage tank 10 series connection successively, and the inlet mouth on the air outlet of gas-liquid separator 8 and absorption tower 1 is communicated with; The top gas inlet-outlet of activated carbon adsorber 2,3 and LP steam pipeline are communicated with; Simultaneously; But the top gas inlet-outlet of activated carbon adsorber 2,3 also fire water pipeline is communicated with; The bottom gas inlet-outlet of activated carbon adsorber 2,3 also can be communicated with the factory air pipeline, is used for the gac after the cooling of adsorption tower 2,3 bubbling airs adds thermal desorption; Said desorption tower 4 bottoms are provided with heating coil; The inlet mouth of heating coil and LP steam pipeline are communicated with; The bottom of desorption tower 4 also is provided with tundish 16; Tundish 16 top fluid inlets and desorption tower 4 bottom liquid outlets are communicated with, and tundish 16 bottom liquid outlets are communicated with through the fluid inlet of diesel oil pump 12 and diesel oil tank 5.The filler on absorption tower 1 is Intalox Saddle (available from Qidong, Jiangsu mixing tank factory); Operational condition is a normal temperature and pressure; Desorption tower 4 used fillers are Mellapak packing (available from Qidong, Jiangsu mixing tank factory), and operational condition is vacuum tightness 0.098MPa, and temperature is 100-130 ℃.
The air (oil gas) that contains the organism Volatile Gas at first carries out preliminary gas-liquid separation (operational condition of surge tank is a normal temperature and pressure) through surge tank 6; 1 usefulness diesel oil absorbs through the absorption tower then; Isolate most of volatile matter, the bottom of diesel oil tank 5 is cooled to diesel oil below 35 ℃ with water coolant, as 30-35 ℃; Diesel oil is sent into the top fluid inlet on absorption tower by circulating oil pump 13 from the bottom of diesel oil tank 5, the oil gas in the absorption tower 1 is sprayed absorption.Absorption process is that two sections circulations absorb in the absorption tower, and epimere is lower concentration section (concentration that promptly absorbs oil gas is lower, and gas concentration is less in the solvent), and the solvent major part circulates between solvent tank and epimere filler, and the small portion overflow is to hypomere; Hypomere is the high density section, and the solvent major part is circulating at the bottom of the tower on absorption tower and between the hypomere filler, and small portion send desorption tower regeneration.
Oil gas after diesel oil absorbs gets into the activated carbon adsorber 2,3 of the alternation of two parallel connections again, further removes residual organic, and the gas that absorption finishes promptly reaches emission standard, enters atmosphere by the top gas inlet-outlet of activated carbon adsorber 2,3.Two activated carbon adsorber 2,3 alternations, wherein one is in the absorption working order, and another is in the steam heating detachment status or the air purge state of cooling or is in stand-by state; Adding the used thermal source of thermal desorption is LP steam (from the water vapor of heat distribution pipe network); Pressure is 0.3～0.5MPag, and oil gas behind the desorption and water vapor mixture be through interchanger 11 cooling, and in water-and-oil separator 9 after the standing separation; Oil phase is the recovery oil product; Send to storage tank 10 and store, water send waste disposal plant, and little of gas A then is back to surge tank 6 to carry out getting into absorption tower 1 after the preliminary gas-liquid separation.
The diesel oil that has dissolved oil gas gets in the desorption tower 4, and by the heating coil heating desorption of desorption tower 4 bottoms, the heating thermal source is the LP steam in the heating coil under vacuum state, and vacuum tightness is 0.098MPa, and Heating temperature is 120 ℃, and pressure is 0.3～0.5MPag.Absorption tower 4 top gases through interchanger 11 with the volatile matter condensation; Lime set is the recovery oil product; Send into storage tank 10 through lime set jar 7 and store, in gas-liquid separator 8 further gas-liquid separations, liquid is the recovery oil product to lime set jar 7 top gases after vacuum unit 15 (being used for keeping the vacuum tightness in the desorption tower) and interchanger 11 coolings; Send into storage tank 10 and store, gas B sends into absorption tower 1 and carries out the oil gas recovery.
The utility model gas recovery system for oil, absorption agent (diesel oil) recycle, loss is few, and solvent loss is lower than 20% of solvent load every year, promptly once to add 20m
3, then annual needs to replenish not enough 4m
3Oil gas recovery rate is high, greater than 99%; The equipment cycle of operation is long, and equipment investment cost is lower; The utility model adopts the steam heating desorption to replace vacuum desorption, and desorption efficient improves, and the active adsorption ability of gac increases, and the activated carbon consumption obviously reduces; Data are as shown in table 1.The Volatile Gas of generations such as storage tank, vacuum unit is incorporated in the oil gas, and whole device nonstaining property gas is discharged.If high temperature appears in active carbon bed, open the fire water spraying cooling in the fire protection pipeline immediately; If high temperature occurs, accidental state such as catch fire, in the time of can't the holdout device safe operation, emergency stopping system cuts off charging immediately, and oil gas is put into atmosphere through the fluid-tight bypass.
With above-mentioned gas recovery system for oil is example, device load 500m
3/ h, at gas concentration and composition, tail gas concentration, the recovery, under the essentially identical condition of indexs such as device lifetime, related data sees the following form 1:
Table 1 is compared each item performance index contrast of the utility model system with existing same device
| Project | This device | Same device |
| Construction costs (ten thousand yuan) | 370 | 530 |
| Power load (kW) | 63 | 90 |
| The adsorption tower regeneration period (h) | 0.5～48 | 0.5 |
| The gac source | Domestic | Abroad |
| Amount of activated (t) | 2×3 | 2×10 |
Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (8)
1. gas recovery system for oil is characterized in that: comprise solvent tank, absorption tower, two activated carbon adsorbers and desorption tower; Air outlet, top, absorption tower and activated carbon adsorber bottom gas inlet-outlet are communicated with; Be connected in parallel between the activated carbon adsorber; Gangway, activated carbon adsorber bottom is communicated with interchanger, water-and-oil separator, storage tank series connection successively, and the air outlet of water-and-oil separator and the inlet mouth on absorption tower are communicated with; The fluid inlet of bottom, absorption tower liquid outlet and desorb cat head end is communicated with, and the fluid inlet of desorption tower bottom liquid outlet and solvent tank is communicated with, and solvent tank bottom liquid outlet and top, absorption tower fluid inlet are communicated with; The vertical air outlet of desorption tower is communicated with interchanger, lime set jar, gas-liquid separator, storage tank series connection successively, and the air outlet of gas-liquid separator and the inlet mouth on absorption tower are communicated with.
2. gas recovery system for oil according to claim 1 is characterized in that: also be provided with surge tank, the inlet mouth on said absorption tower and the air outlet of surge tank are communicated with.
3. gas recovery system for oil according to claim 2 is characterized in that: the air outlet of said water-and-oil separator is communicated with through the inlet mouth on said surge tank and absorption tower.
4. gas recovery system for oil according to claim 1 is characterized in that: said activated carbon adsorber top gas inlet-outlet also is communicated with the LP steam pipeline.
5. gas recovery system for oil according to claim 1 is characterized in that: said desorption tower bottom is provided with heating coil, and the inlet mouth of heating coil and LP steam pipeline are communicated with.
6. gas recovery system for oil according to claim 1 is characterized in that: said desorption tower bottom also is provided with tundish, and tundish top fluid inlet and desorption tower bottom liquid outlet are communicated with, and the fluid inlet of tundish bottom liquid outlet and solvent tank is communicated with.
7. gas recovery system for oil according to claim 1 is characterized in that: said solvent tank bottom also is provided with water-chilling plant, and solvent is cooled to 30-35 ℃.
8. gas recovery system for oil according to claim 1 is characterized in that: the filler on said absorption tower is an Intalox Saddle, and the used filler of said desorption tower is a Mellapak packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120555660 CN202440471U (en) | 2011-12-27 | 2011-12-27 | Oil gas recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120555660 CN202440471U (en) | 2011-12-27 | 2011-12-27 | Oil gas recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN202440471U true CN202440471U (en) | 2012-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120555660 Expired - Lifetime CN202440471U (en) | 2011-12-27 | 2011-12-27 | Oil gas recovery system |
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| CN (1) | CN202440471U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580463A (en) * | 2011-12-27 | 2012-07-18 | 中国寰球工程公司 | System and method for recovering oil gas |
| CN104801148A (en) * | 2015-04-16 | 2015-07-29 | 王新洲 | Environment-friendly treatment and recovery method and device for industrial waste gas containing VOCs (volatile organic compounds) |
| CN104910952A (en) * | 2015-05-27 | 2015-09-16 | 中国石油化工股份有限公司 | Catalytic cracking apparatus stable absorption unit and desulfurization unit shutdown sealed relaying purging process |
| CN106433771A (en) * | 2016-10-26 | 2017-02-22 | 华南理工大学 | Low-energy-consumption catalytic cracking and catalytic gasoline selective hydrogenation combined process |
| CN109999616A (en) * | 2019-02-20 | 2019-07-12 | 太仓市宝马油脂设备有限公司 | A kind of tail gas absorbing system and technique in oil extraction workshop |
-
2011
- 2011-12-27 CN CN 201120555660 patent/CN202440471U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580463A (en) * | 2011-12-27 | 2012-07-18 | 中国寰球工程公司 | System and method for recovering oil gas |
| CN104801148A (en) * | 2015-04-16 | 2015-07-29 | 王新洲 | Environment-friendly treatment and recovery method and device for industrial waste gas containing VOCs (volatile organic compounds) |
| CN104910952A (en) * | 2015-05-27 | 2015-09-16 | 中国石油化工股份有限公司 | Catalytic cracking apparatus stable absorption unit and desulfurization unit shutdown sealed relaying purging process |
| CN106433771A (en) * | 2016-10-26 | 2017-02-22 | 华南理工大学 | Low-energy-consumption catalytic cracking and catalytic gasoline selective hydrogenation combined process |
| CN106433771B (en) * | 2016-10-26 | 2018-04-13 | 华南理工大学 | A kind of catalytic cracking of low energy consumption and catalytic gasoline selective hydrogenation process integration |
| CN109999616A (en) * | 2019-02-20 | 2019-07-12 | 太仓市宝马油脂设备有限公司 | A kind of tail gas absorbing system and technique in oil extraction workshop |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: Two road 100012 Beijing city Chaoyang District high tech Industrial Park, No. 1. Patentee after: China Global Engineering Co. Ltd. Address before: 100029 Beijing city Chaoyang District cherry Garden Street No. 7 Patentee before: China Huanqiu Engineering Co. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120919 |