CN113877356A - Novel low-temperature diesel oil and VOCs (volatile organic compounds) collecting combined facility and process - Google Patents
Novel low-temperature diesel oil and VOCs (volatile organic compounds) collecting combined facility and process Download PDFInfo
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- CN113877356A CN113877356A CN202111318057.2A CN202111318057A CN113877356A CN 113877356 A CN113877356 A CN 113877356A CN 202111318057 A CN202111318057 A CN 202111318057A CN 113877356 A CN113877356 A CN 113877356A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/20—Organic absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention relates to the field of petrochemical environmental protection, in particular to a novel low-temperature diesel oil VOCs collecting combined facility and a process. The combined facility comprises an oil product loading platform, a VOCs condensation recovery unit, a VOCs low-temperature diesel oil absorption tower, a VOCs activated carbon adsorption unit, a VOCs tail gas conveying fan, a boiler blower, a DCC device, a lean and rich diesel oil heat exchanger, a diesel oil cooler, a rich diesel oil delivery pump, a DCC fractionating tower, a VOCs conveying pipeline, a lean diesel oil conveying pipeline and a rich diesel oil conveying pipeline. According to the invention, a large amount of VOCs generated in the loading process of finished gasoline, aromatic hydrocarbon and diesel oil are subjected to condensation recovery, low-temperature diesel oil absorption, activated carbon adsorption, comprehensive treatment of boiler incineration and separation of saturated VOCs components in a DCC fractionating tower, so that the content of VOCs combustible gas is ultralow, the incineration tail gas is discharged up to the standard, effective components are recovered, and the method has obvious safety benefit, environmental protection benefit and economic benefit.
Description
Technical Field
The invention relates to the field of petrochemical environmental protection, in particular to a novel low-temperature diesel oil VOCs collecting combined facility and a process.
Background
VOCs are the general names of volatile organic compounds with melting points lower than room temperature and boiling points between 50 ℃ and 260 ℃. VOCs mainly come from industrial production and social life, and the VOCs are discharged most in industrial production, such as the pharmaceutical industry, the petrochemical industry, the printing industry, the electronic industry and the like, which are accompanied by a large amount of VOCs. VOCs are toxic, harmful, flammable and explosive, and are one of the main causes of atmospheric environmental pollution.
The existing VOCs treatment technology mainly comprises a condensation method, an absorption method, an adsorption method, a membrane separation method, a combustion method, a low-temperature plasma decomposition method, a biological purification method, a photocatalytic oxidation method, a pressure swing adsorption technology, an ozone oxidation method and the like; some of the technologies are mature, and some of the technologies are still in the development and exploration stage. With the continuous upgrade of the national discharge standard of VOCs, the more mature VOCs treatment technology needs to be continuously upgraded. The existing VOCs treatment technology mainly comprises a condensation method, an absorption method, an adsorption method and a low-temperature plasma decomposition method, and after VOCs are treated by the series of technologies, the discharge standard is difficult to reach, or the operation difficulty is high, potential safety hazards exist, or the operation cost is high, so that the economic benefit and the social benefit of the whole device system are influenced. For example: the invention patent with publication number CN108398033A, "a condenser for treating VOCs", is essentially a condenser with filtering function, has a certain effect on recovering VOCs, but is difficult to reach the discharge standard. The following steps are repeated: the invention patent with publication number CN107774097A discloses a VOCs waste gas treatment process, which is essentially a process for treating VOCs waste gas by using an absorption method, and has higher treatment efficiency, but the absorbent N-methylpyrrolidone has explosion danger and is harmful to human health.
If a large amount of VOCs generated in the process of loading finished gasoline, aromatic hydrocarbon and diesel oil is treated by the conventional technology, the effect of the VOCs is difficult to achieve the emission of volatile organic compounds in Shandong provinceStandard DB 37/2801.6-2018, namely VOCs is less than or equal to 60mg/m3The concentration of benzene is less than or equal to 2mg/m3The concentration of toluene is less than or equal to 5mg/m3And the concentration of dimethylbenzene is less than or equal to 8mg/m3Or the content of the combustible gas in the tail gas of the VOCs is higher than 25% of the lowest dangerous explosion limit (national environmental protection standard HJ 2027-.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a novel low-temperature diesel oil and VOCs collecting combined facility and a process.
The technical scheme is as follows:
a novel low-temperature diesel oil collection VOCs combined facility comprises an oil product loading platform, a VOCs condensation recovery unit, a VOCs low-temperature diesel oil absorption tower, a VOCs activated carbon adsorption unit, a VOCs tail gas conveying fan, a boiler blower, a DCC device, a lean and rich diesel oil heat exchanger, a diesel oil cooler, a rich diesel oil delivery pump, a DCC fractionating tower, a VOCs conveying pipeline, a lean diesel oil conveying pipeline and a rich diesel oil conveying pipeline; the head end of the VOCs conveying pipeline is connected with an oil product loading platform, the tail end of the VOCs conveying pipeline is connected with a boiler blower, and a VOCs condensation recovery unit, a VOCs low-temperature diesel oil absorption tower, a VOCs activated carbon adsorption unit and a VOCs tail gas conveying fan are connected in series on the pipeline; the head end of the lean diesel oil conveying pipeline is connected with a DCC device, the tail end of the lean diesel oil conveying pipeline is connected with a low-temperature diesel oil spraying mechanism arranged at the upper part of a VOCs low-temperature diesel oil absorption tower, and a lean diesel oil heat exchanger and a diesel oil cooler are connected in series on the pipeline; the head end of the rich diesel oil conveying pipeline is connected with the bottom of the VOCs low-temperature diesel oil absorption tower, the tail end of the rich diesel oil conveying pipeline is connected with the DCC fractionating tower, and the rich diesel oil delivery pump and the lean diesel oil heat exchanger are connected in series on the pipeline.
The diesel cooler is provided with a low-temperature diesel cooling unit.
The lean diesel oil conveying pipeline is provided with a diesel oil conveying emergency cut-off valve and is arranged on a pipeline between the DCC device and the lean diesel oil heat exchanger.
The lean diesel oil conveying pipeline is provided with a diesel oil flowmeter, a diesel oil temperature measuring thermal resistor and a diesel oil flow regulating valve on a pipeline between the diesel oil cooler and the VOCs low-temperature diesel oil absorption tower in sequence.
The rich diesel oil conveying pipeline is provided with a diesel oil absorption tower liquid level regulating valve and is positioned on a pipeline between the rich diesel oil delivery pump and the lean rich diesel oil heat exchanger.
VOCs pipeline installs VOCs tail gas combustible gas content scale and is in on the pipeline between VOCs tail gas conveyor fan and the boiler forced draught blower.
The diesel oil conveying emergency cut-off valve, the diesel oil flowmeter, the diesel oil temperature measuring thermal resistor, the diesel oil flow regulating valve, the diesel oil absorption tower liquid level regulating valve and the VOCs tail gas combustible gas content meter are all connected with the DCS control system.
The VOCs low-temperature diesel oil absorption tower is a packed tower containing a packing layer, a low-temperature diesel oil distributor is arranged below the low-temperature diesel oil spraying mechanism, and a diesel oil absorption tower liquid level meter is arranged on the outer side of the lower part of the tower body.
Two VOCs tail gas conveying fans are used, one fan is used, and the other fan is used; two rich diesel oil delivery pumps are used for one for standby.
The utility model provides a novel technology of VOCs is collected to low temperature diesel oil, it relies on foretell a novel low temperature diesel oil to collect VOCs combination facility: firstly, collecting macromolecular VOCs through a VOCs condensation recovery unit; secondly, collecting a large amount of VOCs organic matters through a VOCs low-temperature diesel oil absorption tower; then, collecting micromolecular VOCs through a VOCs activated carbon adsorption unit; and finally, delivering the residual VOCs tail gas to a boiler blower for boiler incineration treatment by a VOCs tail gas delivery fan.
Compared with the prior art, the invention mainly has the following remarkable advantages:
1. after a large amount of VOCs generated in the loading process of finished gasoline, aromatic hydrocarbon and diesel oil are comprehensively treated by condensation recovery, low-temperature diesel oil absorption and activated carbon adsorption, the content of combustible gas in the tail gas of the VOCs is lower than 25% of the lowest dangerous explosion limit (national environmental protection standard HJ 2027-2013), and the method has obvious safety benefit; and the waste gas is subjected to boiler incineration treatment and then is discharged after reaching the standard, so that the method has obvious environmental protection benefit.
2. The rich diesel oil absorbing saturated VOCs is conveyed into the DCC fractionating tower, and the saturated VOCs components are separated in the DCC fractionating tower and finally become related components in gas, civil liquefied gas, gasoline or diesel oil, so that the aim of efficiently recovering the VOCs components is fulfilled, and the economic benefit is remarkable.
3. An advanced DCS system is adopted for automatic control, so that the labor intensity of operators can be effectively reduced; the automatic operation or the interlocking action under the abnormal working condition can eliminate the potential safety hazard in time and ensure the stable and safe operation.
4. The structure layout is reasonable, and the operation, inspection and maintenance are convenient.
5. The applicability is strong. The spare parts of the equipment are conventional accessories and are easy to purchase on the market.
Drawings
FIG. 1 is a schematic diagram of the structure layout and basic flow of the present invention;
in the figure: 1-poor diesel oil conveying pipeline, 2-diesel oil conveying emergency cut-off valve, 3-poor rich diesel oil heat exchanger, 4-diesel oil cooler, 5-diesel oil flow regulating valve, 6-VOCs low-temperature diesel oil absorption tower, 7-rich diesel oil delivery pump, 8-diesel oil absorption tower liquid level regulating valve, 9-low-temperature diesel oil cooling unit, 10-VOCs conveying pipeline, 11-VOCs condensation recovery unit, 12-VOCs active carbon adsorption unit, 13-VOCs tail gas conveying fan, 14-low-temperature diesel oil distributor, 15-packing layer, 16-diesel oil absorption tower liquid level meter, 17-diesel oil flowmeter, 18-VOCs tail gas combustible gas content meter, 19-diesel oil temperature measuring thermal resistance, 20-loading platform, 21-boiler blower, 22-DCC device, 23-DCC fractionating tower, 24-diesel-rich conveying pipeline and 25-low-temperature diesel spraying mechanism.
Detailed Description
The present invention will be described in detail below with reference to the following examples and accompanying drawings.
Example 1
See fig. 1. The utility model provides a novel low temperature diesel oil collects VOCs combined facilities, includes oil loading platform 20, VOCs condensation recovery unit 11, VOCs low temperature diesel oil absorption tower 6, VOCs active carbon adsorption unit 12, VOCs tail gas conveying fan 13, boiler forced draught blower 21, DCC device 22, lean and rich diesel oil heat exchanger 3, diesel oil cooler 4, rich diesel oil outward send pump 7, DCC fractionating tower 23, VOCs pipeline 10, lean and rich diesel oil pipeline 1 and rich diesel oil pipeline 24. The head end of VOCs pipeline 10 connects oil loading platform 20, and end-to-end connection boiler forced draught blower 21 establishes ties VOCs condensation recovery unit 11, VOCs low temperature diesel oil absorption tower 6, VOCs active carbon adsorption unit 12 and VOCs tail gas transfer fan 13 on the pipeline. The head end of the lean diesel oil conveying pipeline 1 is connected with a DCC device 22, the tail end of the lean diesel oil conveying pipeline is connected with a low-temperature diesel oil spraying mechanism 25 arranged on the upper portion of the VOCs low-temperature diesel oil absorption tower 6, and a lean diesel oil heat exchanger 3 and a diesel oil cooler 4 are connected in series on the pipeline. The head end of a rich diesel oil conveying pipeline 24 is connected with the bottom of the VOCs low-temperature diesel oil absorption tower 6, the tail end of the rich diesel oil conveying pipeline is connected with the DCC fractionating tower 23, and a rich diesel oil delivery pump 7 and a lean diesel oil heat exchanger 3 are connected in series on the pipeline.
Example 2
See fig. 1. A novel low-temperature diesel oil collection VOCs combined facility is characterized in that on the basis of the technical scheme recorded in embodiment 1, a diesel oil cooler 4 is provided with a low-temperature diesel oil cooling unit 9 so as to better meet the requirement of low-temperature diesel oil.
Example 3
See fig. 1. A novel low-temperature diesel oil collection VOCs combined facility is characterized in that on the basis of the technical scheme recorded in embodiment 1, a diesel oil conveying emergency cut-off valve 2 is installed on a lean diesel oil conveying pipeline 1 and is located on a pipeline between a DCC device 22 and a lean and rich diesel oil heat exchanger 3. When the VOCs low-temperature diesel absorption tower 6 is in abnormal working condition interlocking and stopping operation, the diesel conveying emergency cut-off valve 2 can be automatically closed, so that the lean diesel cannot overflow to the VOCs condensation recovery unit 11, the VOCs activated carbon adsorption unit 12, the VOCs tail gas conveying fan 13 or the boiler blower 21, and production accidents caused by diesel overflow are avoided.
Example 4
See fig. 1. A novel low-temperature diesel oil collection VOCs combined facility is characterized in that on the basis of the technical scheme recorded in embodiment 3, a diesel oil flow meter 17, a diesel oil temperature measurement thermal resistor 19 and a diesel oil flow regulating valve 5 are sequentially installed on a pipeline between a diesel oil cooler 4 and a VOCs low-temperature diesel oil absorption tower 6 of a poor diesel oil conveying pipeline 1. The quantity of the poor diesel is an important influence factor of the working efficiency of the VOCs low-temperature diesel absorption tower 6, and the diesel flowmeter 17 and the diesel flow regulating valve 5 are installed, so that the problem of the working efficiency of the VOCs low-temperature diesel absorption tower 6 is well solved, and the labor intensity of operators is reduced. The diesel oil temperature measuring thermal resistor 19 can be installed to master the real-time dynamic state of the diesel oil temperature at any time, and provides a reliable basis for adjusting the diesel oil temperature.
Example 5
See fig. 1. A novel low-temperature diesel oil collection VOCs combined facility is characterized in that on the basis of the technical scheme recorded in embodiment 4, a diesel oil rich delivery pipeline 24 is provided with a diesel oil absorption tower liquid level regulating valve 8 and is positioned on a pipeline between a diesel oil rich delivery pump 7 and a diesel oil lean heat exchanger 3; the installation of this valve can be accurate control VOCs low temperature diesel oil absorption tower 6's liquid level, reduces the energy consumption of rich diesel oil outward-feeding pump 7 and reduces operating personnel's intensity of labour.
Example 6
See fig. 1. The utility model provides a novel VOCs joint facilities is collected to low temperature diesel oil, on the technical scheme basis that embodiment 5 recorded, VOCs pipeline 10 installs VOCs tail gas combustible gas content table 18 and is in on the pipeline between VOCs tail gas conveyor fan 13 and boiler forced draught blower 21, can automatic monitoring VOCs tail gas combustible gas content and carry out interlocking control according to the content height, ensures the safe and stable operation of whole production process.
Example 7
See fig. 1. On the basis of the technical scheme recorded in embodiment 6, the diesel oil conveying emergency cut-off valve 2, the diesel oil flowmeter 17, the diesel oil temperature measuring thermal resistor 19, the diesel oil flow regulating valve 5, the diesel oil absorption tower liquid level regulating valve 8 and the VOCs tail gas combustible gas content meter 18 are all connected with the DCS control system so as to achieve the purpose of automatic interlocking control.
Example 8
See fig. 1. A novel low-temperature diesel oil collection VOCs combined facility is characterized in that on the basis of the technical scheme recorded in embodiment 1, a VOCs low-temperature diesel oil absorption tower 6 is set to be a packed tower containing a packing layer 15, a low-temperature diesel oil distributor 14 is arranged below a low-temperature diesel oil spraying mechanism 25, and a diesel oil absorption tower liquid level meter 16 is installed on the outer side of the lower portion of a tower body. The low-temperature diesel oil distributor 14 can enable the low-temperature diesel oil to flow to the filler layer 15 more uniformly; the diesel absorption tower level gauge 16 provides convenience for better grasping the liquid level of the VOCs low-temperature diesel absorption tower 6.
Example 9
See fig. 1. A novel low-temperature diesel oil collects VOCs combined facility, on the basis of the technical scheme recorded in embodiment 1, VOCs tail gas conveying fans 13 are two, one fan is used and the other fan is standby; two rich diesel oil delivery pumps 7 are used and prepared. The arrangement of one use and one spare provides reliable guarantee for the normal operation of facilities.
Example 10
See fig. 1. A novel technology for collecting VOCs from low-temperature diesel oil relies on the novel low-temperature diesel oil-collecting VOCs combined facility in the embodiment 1: firstly, macromolecular VOCs are collected through a VOCs condensation recovery unit 11; secondly, collecting a large amount of VOCs organic matters through a VOCs low-temperature diesel oil absorption tower 6; then, collecting small molecular VOCs through a VOCs activated carbon adsorption unit 12; finally, the residual VOCs tail gas is sent to a boiler blower 21 for boiler incineration treatment through a VOCs tail gas conveying fan 13.
The basic process principle of the present invention is now briefly described as follows:
VOCs waste gas generated during oil product loading enters a VOCs condensation recovery unit 11 (the cooling temperature of the VOCs condensation recovery unit is about-70 ℃, the removal rate is about 45%, and the volume specific concentration of VOCs after condensation treatment is about 2.25%); VOCs enter the lower part of a VOCs low-temperature diesel oil absorption tower 6 after being treated by a VOCs condensation recovery unit 11 (the working temperature of lean diesel oil is between 19 and 25 ℃, the absorption removal rate of VOCs low-temperature diesel oil is about 95 percent, and the volume specific concentration of VOCs after being absorbed by low-temperature diesel oil is about 0.12 percent); VOCs enter a VOCs activated carbon adsorption unit 12 after being absorbed by a low-temperature diesel oil absorption tower 6, and the content of VOCs tail gas combustible gas after VOCs are adsorbed by activated carbon is below 25% of the lower limit of the most dangerous explosion limit; finally, the VOCs tail gas is sent to a boiler blower 21 through a VOCs tail gas conveying fan 13. VOCs absorbent diesel oil comes from a DCC device 22, enters the upper part of a VOCs low-temperature diesel oil absorption tower 6 through a diesel oil conveying emergency cut-off valve 2, a lean rich diesel oil heat exchanger 3 and a diesel oil cooler 4, enters the lower part of the diesel oil absorption tower 6 after being in countercurrent contact with VOCs from the lower part of the low-temperature diesel oil absorption tower 6, then absorbs VOCs saturated rich diesel oil, is conveyed into a DCC fractionating tower 23 through a rich diesel oil outward-conveying pump 7, and is separated into saturated VOCs components in the DCC fractionating tower 23, and finally becomes related components in gas, civil liquefied gas, gasoline or diesel oil, thereby achieving the purpose of efficiently recovering the VOCs components.
Claims (10)
1. The utility model provides a novel VOCs combined facilities is collected to low temperature diesel oil which characterized in that: the system comprises an oil product loading platform, a VOCs condensation recovery unit, a VOCs low-temperature diesel oil absorption tower, a VOCs activated carbon adsorption unit, a VOCs tail gas conveying fan, a boiler blower, a DCC device, a lean and rich diesel oil heat exchanger, a diesel oil cooler, a rich diesel oil delivery pump, a DCC fractionating tower, a VOCs conveying pipeline, a lean diesel oil conveying pipeline and a rich diesel oil conveying pipeline; the head end of the VOCs conveying pipeline is connected with an oil product loading platform, the tail end of the VOCs conveying pipeline is connected with a boiler blower, and a VOCs condensation recovery unit, a VOCs low-temperature diesel oil absorption tower, a VOCs activated carbon adsorption unit and a VOCs tail gas conveying fan are connected in series on the pipeline; the head end of the lean diesel oil conveying pipeline is connected with a DCC device, the tail end of the lean diesel oil conveying pipeline is connected with a low-temperature diesel oil spraying mechanism arranged at the upper part of a VOCs low-temperature diesel oil absorption tower, and a lean diesel oil heat exchanger and a diesel oil cooler are connected in series on the pipeline; the head end of the rich diesel oil conveying pipeline is connected with the bottom of the VOCs low-temperature diesel oil absorption tower, the tail end of the rich diesel oil conveying pipeline is connected with the DCC fractionating tower, and the rich diesel oil delivery pump and the lean diesel oil heat exchanger are connected in series on the pipeline.
2. A novel combination of low temperature diesel capture VOCs as claimed in claim 1 wherein: the diesel cooler is provided with a low-temperature diesel cooling unit.
3. A novel combination of low temperature diesel capture VOCs as claimed in claim 1 wherein: the lean diesel oil conveying pipeline is provided with a diesel oil conveying emergency cut-off valve and is arranged on a pipeline between the DCC device and the lean diesel oil heat exchanger.
4. A novel combination of low temperature diesel capture VOCs as claimed in claim 3 wherein: the lean diesel oil conveying pipeline is provided with a diesel oil flowmeter, a diesel oil temperature measuring thermal resistor and a diesel oil flow regulating valve on a pipeline between the diesel oil cooler and the VOCs low-temperature diesel oil absorption tower in sequence.
5. The novel low temperature diesel collection VOCs integrated facility of claim 4, wherein: the rich diesel oil conveying pipeline is provided with a diesel oil absorption tower liquid level regulating valve and is positioned on a pipeline between the rich diesel oil delivery pump and the lean rich diesel oil heat exchanger.
6. A novel low temperature diesel collection VOCs integrated facility in accordance with claim 5, wherein: VOCs pipeline installs VOCs tail gas combustible gas content scale and is in on the pipeline between VOCs tail gas conveyor fan and the boiler forced draught blower.
7. The novel low temperature diesel collection VOCs integrated facility of claim 6, wherein: the diesel oil conveying emergency cut-off valve, the diesel oil flowmeter, the diesel oil temperature measuring thermal resistor, the diesel oil flow regulating valve, the diesel oil absorption tower liquid level regulating valve and the VOCs tail gas combustible gas content meter are all connected with the DCS control system.
8. A novel combination of low temperature diesel capture VOCs as claimed in claim 1 wherein: the VOCs low-temperature diesel oil absorption tower is a packed tower containing a packing layer, a low-temperature diesel oil distributor is arranged below the low-temperature diesel oil spraying mechanism, and a diesel oil absorption tower liquid level meter is arranged on the outer side of the lower part of the tower body.
9. A novel combination of low temperature diesel capture VOCs as claimed in claim 1 wherein: two VOCs tail gas conveying fans are used, one fan is used, and the other fan is used; two rich diesel oil delivery pumps are used for one for standby.
10. A novel process for collecting VOCs from low-temperature diesel oil relies on the novel low-temperature diesel oil VOCs combined facility in claim 1, and is characterized in that: firstly, collecting macromolecular VOCs through a VOCs condensation recovery unit; secondly, collecting a large amount of VOCs organic matters through a VOCs low-temperature diesel oil absorption tower; then, collecting micromolecular VOCs through a VOCs activated carbon adsorption unit; and finally, delivering the residual VOCs tail gas to a boiler blower for boiler incineration treatment by a VOCs tail gas delivery fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111318057.2A CN113877356A (en) | 2021-11-09 | 2021-11-09 | Novel low-temperature diesel oil and VOCs (volatile organic compounds) collecting combined facility and process |
Applications Claiming Priority (1)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111617596A (en) * | 2019-02-28 | 2020-09-04 | 中国石化工程建设有限公司 | Method for treating gas containing VOCs |
| CN112807940A (en) * | 2020-12-31 | 2021-05-18 | 南京都乐制冷设备有限公司 | Method for treating VOCs waste gas containing light alkane |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111617596A (en) * | 2019-02-28 | 2020-09-04 | 中国石化工程建设有限公司 | Method for treating gas containing VOCs |
| CN112807940A (en) * | 2020-12-31 | 2021-05-18 | 南京都乐制冷设备有限公司 | Method for treating VOCs waste gas containing light alkane |
Non-Patent Citations (1)
| Title |
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| 王志良 等 著: "《精细化工行业废气污染物控制技术及示范》", 中国环境科学出版社, pages: 113 * |
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