CN211568942U - Gas-phase oil gas breathing recovery system of normal-pressure storage tank - Google Patents
Gas-phase oil gas breathing recovery system of normal-pressure storage tank Download PDFInfo
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- CN211568942U CN211568942U CN201922313331.1U CN201922313331U CN211568942U CN 211568942 U CN211568942 U CN 211568942U CN 201922313331 U CN201922313331 U CN 201922313331U CN 211568942 U CN211568942 U CN 211568942U
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Abstract
The utility model relates to a gas phase oil gas breath recovery system of an atmospheric storage tank, which belongs to the field of VOC recovery and comprises a storage tank, VOC treatment equipment, a compressor and a spherical tank; the gas vent of storage tank is connected VOC treatment facility, and compressor air inlet is passed through to VOC treatment facility's gas outlet, and the compressor gas outlet is connected to the spherical tank through compressed gas pipeline, and the spherical tank is connected to the storage tank through gas recovery pipeline. The utility model discloses reduce storage tank VOCs emission and reduce the whole energy consumption of VOC processing system to reduce the cost that enterprise VOC handled, reached energy-conserving effect of reducing consumption.
Description
Technical Field
The utility model relates to a improve the normal pressure storage tank VOC's that volatilize when "big breathing, little breathing recovery energy-conserving processing system, it belongs to VOC recovery field.
Background
As China pays attention to environmental protection in recent years, VOC recovery facilities are a field which is researched by various industries at present. In the process of oil recovery from a daily normal-pressure storage tank and daily oil storage, "big breath and small breath", most of substances discharged from the storage tank are nitrogen, so that after the VOCs in the storage tank are discharged through a treatment device, the released gas is high-purity nitrogen, and if the VOCs are directly discharged, resource waste can be caused.
Disclosure of Invention
According to the defect that above-mentioned prior art exists, the utility model aims at providing a recovery system is breathed to atmospheric storage tank gaseous phase oil gas safe effective, economic environmental protection, can retrieve the high-purity nitrogen gas that VOCs treatment facility discharged, the efficiency of great improvement VOCs operation, the effectual running cost who reduces VOCs.
In order to achieve the above object, the utility model adopts the following technical scheme: a gas phase oil gas breathing recovery system of an atmospheric storage tank comprises a storage tank, VOC treatment equipment, a compressor and a spherical tank; the gas vent of storage tank is connected VOC treatment facility, and compressor air inlet is connected to VOC treatment facility's gas outlet, and the compressor gas outlet is connected to the spherical tank through compressed gas pipeline, and the spherical tank is connected to the storage tank through gas recovery pipeline.
Furthermore, the spherical tank is provided with a nitrogen supplementing line, and a nitrogen supplementing valve is arranged on the nitrogen supplementing line.
Furthermore, a pressure sensor is arranged above the nitrogen spherical tank and is connected with a nitrogen supplementing valve on a nitrogen supplementing line in series, and if the pressure is lower than the set pressure, the nitrogen supplementing valve is opened. The pressure sensor is a Siemens remote transmission pressure transmitter 7MF4433-1CA02-2SC 6.
Further, a discharge valve and an oxygen content analyzer are arranged on the compressed gas pipeline.
Based on the technical scheme, the oxygen content analyzer and the discharge valve are connected in series through DCS signals, and the model of the oxygen content analyzer is TDL/M400.
Further, the VOC treatment apparatus is a pressure swing adsorption apparatus, a condensation apparatus or a membrane absorption apparatus.
The working principle is as follows: the storage tank is handled the jar interior gas through VOC treatment facility and is discharged nitrogen gas to the spherical tank through the compressor, and the spherical tank is in when the storage tank is in the state of breathing in and replenishes jar interior nitrogen gas to the storage tank again, when discharge gas oxygen content unsatisfied the storage tank regulation oxygen content then discharge nitrogen gas to the atmosphere through the discharge valve in, if the spherical tank pressure is low and is not enough to reach the storage tank use amount then carry out the benefit nitrogen through nitrogen gas replenishing line and reach storage tank respiratory balance to minimum emission and replenishment operation.
The utility model has the advantages that: the utility model discloses reduce storage tank VOCs emission and reduce the whole energy consumption of VOC processing system to reduce the cost that enterprise VOC handled, reached energy-conserving effect of reducing consumption.
Drawings
FIG. 1 is a process diagram of a gas phase oil gas breath recovery system of an atmospheric storage tank;
in the figure: 1. a storage tank; 2. VOC treatment equipment; 3. a compressor; 4. an oxygen content analyzer; 5. a discharge valve; 6. a spherical tank; 7. a nitrogen gas make-up line; 8. a compressed gas line; 9. a gas recovery line.
Detailed Description
In order to make the structure and function of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solution in the embodiments of the present invention.
Referring to the attached figure 1, the atmospheric storage tank gas-phase oil gas breathing recovery system comprises a storage tank 1, VOC treatment equipment 2, a compressor 3 and a spherical tank 6; VOC treatment facility is connected to the gas vent of storage tank 1, and 3 air inlets of compressor are connected to the gas outlet of VOC treatment facility 2, and 3 gas outlets of compressor are connected to spherical tank 6 through compressed gas pipeline 8, and spherical tank 6 is connected to storage tank 1 through gas recovery pipeline 9.
Further, the spherical tank 6 is provided with a nitrogen supplementing line 7, and a nitrogen supplementing valve is arranged on the nitrogen supplementing line 7.
Further, a pressure sensor is arranged above the nitrogen spherical tank and connected with a nitrogen gas supplementing valve on the nitrogen gas supplementing line 7 in series, and if the pressure is lower than the set pressure, the nitrogen gas supplementing valve is opened. The pressure sensor is a Siemens remote transmission pressure transmitter 7MF4433-1CA02-2SC 6.
Further, a discharge valve 5 and an oxygen content analyzer 4 are provided on the compressed gas line 8.
Based on the technical scheme, the oxygen content analyzer and the discharge valve are connected in series through DCS signals, and the model of the oxygen content analyzer is TDL/M400.
Further, the discharge valve 5 and the oxygen content analyzer 4 may also be provided on the VOC recovery apparatus outlet line.
Further, the VOC treatment equipment 2 is VOC treatment equipment represented by currently common methods such as pressure swing adsorption, condensation, membrane absorption and the like, and is specifically determined according to material media.
The working principle is as follows: the storage tank 1 is used for treating gas in the tank through the VOC treatment equipment 2, compressing nitrogen, discharging the nitrogen into the spherical tank 6 through the compression device 3, supplementing the nitrogen in the tank into the storage tank 1 through the spherical tank 6 when the storage tank 1 is in an air suction state, and discharging the nitrogen into the atmosphere through the discharge device 5 when the oxygen content of the discharged gas does not meet the specified oxygen content of the storage tank. If the pressure of the spherical tank 6 is too low and is not enough to reach the usage amount of the storage tank 1, nitrogen is supplemented through a nitrogen supplementing line 7, the breathing balance of the storage tank is achieved, and the operation with the minimum discharge and supplementing amount is guaranteed.
After the method is adopted, compared with the prior art, the method has the following beneficial effects: 1. and the discharge amount of VOCs in the storage tank is reduced. 2. The overall energy consumption of the VOC treatment system is reduced. 3. The nitrogen supplement amount of nitrogen is reduced. 4. The VOC treatment cost of enterprises is reduced. 5. The purpose of improving the safety factor of the storage tank is achieved due to the reduction of the oxygen content.
The above list is only the preferred embodiment of the present invention. Obviously, the present invention is not limited to the above embodiments, and many modifications are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the invention should be considered as within the scope of the invention.
Claims (4)
1. The utility model provides a recovery system is breathed to atmospheric pressure storage tank gaseous phase oil gas which characterized in that: comprises a storage tank, VOC treatment equipment, a compressor and a spherical tank; the gas vent of storage tank is connected VOC treatment facility, and compressor air inlet is connected to VOC treatment facility's gas outlet, and the compressor gas outlet is connected to the spherical tank through compressed gas pipeline, and the spherical tank is connected to the storage tank through gas recovery pipeline.
2. The atmospheric storage tank gas-phase oil gas breath recovery system of claim 1, wherein: the spherical tank is provided with a nitrogen supplementing line, and a nitrogen supplementing valve is arranged on the nitrogen supplementing line.
3. The atmospheric storage tank gas-phase oil gas breath recovery system of claim 1, wherein: and the compressed gas pipeline is provided with a discharge valve and an oxygen content analyzer.
4. The atmospheric storage tank gas-phase oil gas breath recovery system of claim 1, wherein: the VOC treatment equipment is pressure swing adsorption equipment, condensation equipment or membrane absorption equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922313331.1U CN211568942U (en) | 2019-12-20 | 2019-12-20 | Gas-phase oil gas breathing recovery system of normal-pressure storage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922313331.1U CN211568942U (en) | 2019-12-20 | 2019-12-20 | Gas-phase oil gas breathing recovery system of normal-pressure storage tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211568942U true CN211568942U (en) | 2020-09-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922313331.1U Active CN211568942U (en) | 2019-12-20 | 2019-12-20 | Gas-phase oil gas breathing recovery system of normal-pressure storage tank |
Country Status (1)
| Country | Link |
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| CN (1) | CN211568942U (en) |
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2019
- 2019-12-20 CN CN201922313331.1U patent/CN211568942U/en active Active
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