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Low-temperature refrigeration device for recycling oil gas

A refrigeration device and low-temperature technology, applied in steam/steam condensers, steam condensation, chemical instruments and methods, etc., can solve problems such as energy waste and unsafety, reduce costs, reduce installed capacity, and improve energy utilization. Effect

Inactive Publication Date: 2008-08-20
BEIJING UNIV OF TECH +2
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  • Summary
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  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

This part of air tail gas is directly discharged into the atmosphere, which not only causes a lot of energy waste, but also causes the moisture in the ambient air to condense to form water mist. The very low temperature also has certain unsafe factors.

Method used

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  • Low-temperature refrigeration device for recycling oil gas
  • Low-temperature refrigeration device for recycling oil gas
  • Low-temperature refrigeration device for recycling oil gas

Examples

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Embodiment Construction

[0019] Such as figure 1 As shown, it is an embodiment of recovering the cooling capacity of directly condensing oil and gas from air tail gas. The system mainly includes the primary refrigeration system 7 (including the primary evaporator 2), the secondary refrigeration system 8 (including the secondary evaporator 4), the tertiary refrigeration system 9 (including the tertiary evaporator 6), and the primary oil-gas cooler 1. Secondary oil-air cooler 3. Third-stage oil-air cooler 5. The three evaporators of the refrigeration system are divided into three stages (first-stage evaporator 2, second-stage evaporator 4, and third-stage evaporator 6) to reduce the temperature of the fuel vapor / air mixture step by step, and the fuel vapor in the mixture is It is gradually condensed and separated, and finally only the air tail gas with a very low temperature leaves the evaporator 6 of the three-stage refrigeration system. This part of the air exhaust gas is led back to the front, and ...

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Abstract

The invention discloses a cryogenic refrigerating unit, used for recovering the vapor of the volatile fuel oil (such as gasoline) with condensing method and also used for recovering the vapor of other type of volatile materials (such as alcohol). The unit comprises at least two refrigeration systems, each of which comprises a compressor, a condenser, an expansion valve and a plurality of evaporators; the evaporators of the refrigeration system are arranged inside an oil gas pipeline in turn; and an exhaust tube is arranged behind the last evaporator. The invention is characterized in that a refrigerating capacity recovering device is connected with the exhaust tube in series. The cryogenic refrigerating unit has the advantages that the exhaust gas discharged from the last evaporator can be reclaimed so as to reduce the energy consumption of the system and increase the energy utilization ratio, reduce the energy waster, greatly reduce the heat load of the device and the installation capacity, reduce the device cost and the initial cost, and increase the operation efficiency.

Description

technical field [0001] The invention relates to a low-temperature refrigeration device used for recovering oil and gas, which is used for recovery of volatile fuel oil (such as gasoline) vapor by condensation method. It can also be used for the recovery of other volatile substances (such as alcohol, etc.). Background technique [0002] Volatile fuel such as gasoline produces a large amount of evaporation loss during storage, transportation, loading and unloading, forming fuel vapor. At present, the total evaporation loss of the oil product storage and transportation system of domestic refineries accounts for about 0.3% of the crude oil processing volume of the refinery, mainly due to storage and transportation losses. Fuel vapor is directly discharged into the atmosphere, which on the one hand causes a large amount of energy waste; on the other hand, flammable and combustible oil and gas pose a serious safety hazard; in addition, oil and gas are not only directly toxic to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D5/00F28B9/00
Inventor 谢文新李红旗李俊明
Owner BEIJING UNIV OF TECH
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