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Recovery system and recovery method for oil gas absorbed and desorbed by asymmetric double pots

An oil and gas recovery system, asymmetric technology, applied in the field of asymmetric double-tank absorption and desorption oil and gas recovery system, can solve the problems of closed tank mouth, internal oil and gas reduction, long interval time, etc. The effect of large size, saving investment cost and long regeneration time

Active Publication Date: 2017-01-11
上海聚宸新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] 1. After the tanker at the gas station is unloaded, some gas station operators need to manually check whether the tanker has been unloaded, and open the top cover of the tanker, causing the oil and gas in the tanker to be released into the atmosphere;
[0015] 2. The tank trucks that transport oil to the gas station may pull gasoline today, and then go to the oil depot to pull diesel tomorrow. However, the diesel stacks used by the oil depot to load the tank trucks are not equipped with oil vapor recovery equipment at all (for oil vapor recovery of diesel oil, There is no mandatory requirement in the country), which leads to the gasoline oil gas in the tanker running into the atmosphere in vain;
[0016] 3. The airtightness of the tank car is not tight, and the gas is easier than the liquid to cause a sharp change in volume due to temperature changes. The oil and gas in the tank car will increase the internal pressure of the tank car due to temperature changes. Many tank car covers, detection ports and other parts The airtightness is not tight, and the tank truck is running all over the street with the whole vehicle of oil and gas. When the oil is loaded in the oil depot next time, the internal oil and gas may have been greatly reduced;
[0017] 4. Many tank cars have not been modified to load oil at the bottom, and the size of the upper oil loading port is different. The crane pipe of the oil depot cannot effectively seal the tank mouth of the tank car at all, so that the oil gas recovery equipment of the oil depot cannot collect high-concentration oil gas. Affect the yield of oil gas recovery equipment in oil depot
Due to the very long intervals between each use of oil and gas recovery equipment in gas stations, if the oil and gas recovery equipment in gas stations directly adopts the traditional double-group activated carbon alternate adsorption and desorption process, only one hour in every 24 to 72 hours may be used at full capacity. , most of the rest of the time is idle, no doubt the utilization rate of the adsorption and desorption system is very low

Method used

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  • Recovery system and recovery method for oil gas absorbed and desorbed by asymmetric double pots
  • Recovery system and recovery method for oil gas absorbed and desorbed by asymmetric double pots
  • Recovery system and recovery method for oil gas absorbed and desorbed by asymmetric double pots

Examples

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Effect test

Embodiment 1

[0096] Such as Figure 4 As shown, the present invention discloses an asymmetric double tank absorption and desorption oil gas recovery system, which is used to recover the oil gas generated in the volatilization process and oil unloading process of buried tanks or storage tanks, including a first cut-off valve 1, a first-stage Oil-gas condenser 2, secondary oil-gas condenser 3, second shut-off valve 4, first-stage large activated carbon tank 5 and third shut-off valve 6, wherein:

[0097] One end of the first cut-off valve 1 is connected to the oil-gas inlet, and the other end is connected to the positive input end of the first-stage oil-gas condenser 2; the positive output end of the first-stage oil-gas condenser 2 is connected to the second-stage oil-gas condenser The input end of the device 3; the output end of the secondary oil-gas condenser 3 is connected to the reverse input end of the first-stage oil-gas condenser 2; the reverse output end of the first-stage oil-gas co...

Embodiment 2

[0108] Such as Figure 5 As shown, the difference between this embodiment and the oil and gas recovery system described in Embodiment 1 is that, in addition to the vacuum pump 8, the pressure maintaining device 9, and the fourth shut-off valve 10, the system also includes a fifth shut-off valve 12 and a secondary Small activated carbon tank 13, wherein:

[0109] The inlet of the vacuum pump 8 is connected with an end of the first-stage large activated carbon tank 5, and the outlet of the vacuum pump 8 is connected with the positive input end of the first-stage oil-gas condenser 2;

[0110] One end of the pressure maintaining device 9 is simultaneously connected to the second cut-off valve 4 and the reverse output end of the primary oil-gas condenser 2, and the other end is connected to one end of the fourth cut-off valve 10;

[0111] One end of the fifth shut-off valve 12 is connected with the other end of the first-stage large activated carbon tank 5, and the other end is co...

Embodiment 3

[0116] Such as Figure 6 As shown, the present invention additionally discloses an asymmetric double tank adsorption and desorption method for oil and gas recovery, using the oil and gas recovery system described in Example 1 for oil and gas recovery, and the specific steps include:

[0117] Step 1: The oil and gas generated during unloading or tanking pass through the first cut-off valve and enter the first-stage oil and gas condenser to reduce the temperature to -10 to +10°C and remove most of the moisture in the oil and gas;

[0118] Step 2: The pre-cooled oil and gas enter the secondary oil and gas condenser, and the refrigeration device outputs cooling capacity to the secondary oil and gas condenser to reduce the temperature of the oil and gas to -10~-80°C, and part of the hydrocarbons in the oil and gas are condensed and recovered , the remaining low-temperature gas returns to the first-stage oil-gas condenser for heat exchange with the high-temperature oil-gas that ente...

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Abstract

The invention discloses a recovery system and a recovery method for an oil gas absorbed and desorbed by asymmetric double pots. The recovery system comprises a first stop valve, a first-level oil gas condenser, a second-level oil gas condenser, a second stop valve, a first-level big activated carbon canister and a third stop valve, wherein an oil gas inlet is connected with one end of the first stop valve; a positive input end of the first-level oil gas condenser is connected with the other end of the first stop valve; a positive output end of the first-level oil gas condenser is connected with an input end of the second-level oil gas condenser; an output end of the second-level oil gas condenser is connected with a negative input end of the first-level oil gas condenser; a negative output end of the first-level oil gas condenser is connected with one end of the second stop valve; the other end of the second stop valve is connected with one end of the first-level big activated carbon canister; one end of the third stop valve is connected with the other end of the first-level big activated carbon canister; the other end of the third stop valve is connected with a first oil gas outlet; the first stop valve, the first-level oil gas condenser, the second-level oil gas condenser, the first-level oil gas condenser, the second stop valve, the first-level big activated carbon canister and the third stop valve are successively connected and form an oil gas recycling subsystem.

Description

technical field [0001] The invention relates to the field of oil and gas recovery equipment, in particular to an oil and gas recovery system and method for asymmetric double-tank absorption and desorption. Background technique [0002] Traditional oil and gas recovery equipment used for tertiary oil and gas recovery or oil depot generally adopts condensation adsorption method, adsorption absorption method and other processes for recovery. For condensation adsorption method, one-to-multi-level stepwise condensation is used to gradually change the phase of oil and gas. Liquefaction and separation, the concentration of the separated oil and gas gradually decreases, and then enters the subsequent activated carbon system for adsorption and purification to be discharged. [0003] Adsorption is to use two sets of adsorption tanks (possibly a group of multiple tanks) with the same volume. When one group of adsorption tanks is adsorbed, the other group of adsorption tanks is desorbed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00B01D53/02
CPCB01D5/0057B01D53/002B01D53/02B01D2253/102B01D2259/40001B01D2259/40083
Inventor 马中华
Owner 上海聚宸新能源科技有限公司
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