CN216171020U - Petrochemical waste gas purification device with suction and exhaust functions - Google Patents
Petrochemical waste gas purification device with suction and exhaust functions Download PDFInfo
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- CN216171020U CN216171020U CN202122306656.4U CN202122306656U CN216171020U CN 216171020 U CN216171020 U CN 216171020U CN 202122306656 U CN202122306656 U CN 202122306656U CN 216171020 U CN216171020 U CN 216171020U
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Abstract
The present disclosure relates to an outer petrochemical waste gas purification device that arranges of suction, the device includes: a package case (1); the rotary vane separator (2) is arranged in the packaging shell (1) and is used for primary separation of pumping outward petrochemical waste gas so as to remove large-particle-size liquid drops in the outward petrochemical waste gas; the heterojunction fiber coalescence module (4) is arranged on the upper part of the packaging shell (1) and is used for carrying out advanced treatment on the liquid-containing gas separated by the rotary vane separator (2) so as to further remove small-particle-size liquid drops in the liquid-containing gas; and the liquid discharge port (3) is connected with the middle part of the packaging shell (1) and is used for periodically discharging liquid from a liquid collecting tank into which liquid drops falling from the heterojunction fiber coalescence module (4) to the rotary vane separator (2) are separated.
Description
Technical Field
The utility model belongs to petrochemical industry pump drainage waste gas safe dredging and online separation purify the field, relate to and utilize vane gas-liquid separator and heterojunction fiber silk screen coupling to carry out centrifugal separation, entrapment and coalescence to the liquid phase in the gas based on the motion trail and the density difference of gaseous phase and liquid phase to realize gaseous deep purification, be applicable to and handle the two-phase separation of gas-liquid in the petrochemical industry introduces the waste gas outward. Specifically, the present disclosure provides an externally introduced exhaust gas purification device that simultaneously achieves high-efficiency gas-liquid separation and self-purification with a separation structure.
Background
In order to avoid safety risk and odor pollution caused by accumulation of a large amount of Volatile Organic Compounds (VOCs) in a treatment unit in the petrochemical wastewater treatment process, a pumping mode is generally adopted at present and then the volatile organic compounds are concentrated and sent to a VOCs treatment device. For avoiding VOCs source facility safety risk to cause the swept to subsequent fan and VOCs processing apparatus, the scene is usually in transporting the pipeline and being close to sewage treatment facility department and setting up the spark arrester to keep apart gas transmission pipeline and subsequent fan and VOCs processing unit. However, since the Volatile Organic Compounds (VOCs) overflowed from petrochemical waste water contain a large amount of liquid drops such as water, oil and the like, and are easily adhered to a flame arrester to cause rapid increase of pressure drop of a pipeline, pipeline blockage and large amount of accumulation of VOCs in a sewage treatment facility are finally caused, so that odor pollution and safety risks are caused, and therefore, development of a method and a device for purifying petrochemical waste gas by pumping and discharging is urgently needed.
At present, two schemes of physical separation and chemical treatment are generally adopted for the online liquid removal of the waste gas. The physical method utilizes physical differences of gas-liquid two phases, such as gravity, density, particle size and the like, so as to realize gas-liquid two-phase separation, and the conventional technology comprises gravity settling, baffling separation, centrifugal separation, screen separation, ultrafiltration separation and the like; the chemical principle mainly adopts chemical agents to adsorb liquid phase components such as oil drops, water drops and the like in the waste gas, and a specific device adopts a solid bed and the like to realize the form of filler adsorption.
The utility model patent application CN110876872A proposes a method for separating gas and liquid by a spiral separator, which utilizes the density difference between gas and liquid, the gas containing liquid firstly enters the spiral separator for first-stage separation, the gas after the first-stage separation enters the twisted belt separator for deep separation, the separated gas moves upwards and is discharged from the separator shell, and the liquid enters a liquid collecting tank under the action of gravity. The device has the advantages of complex structure, low separation efficiency and incapability of deeply purifying gas containing liquid.
Utility model CN209584136U provides an utilize and produce fast condensate liquid and carry out gas-liquid separation's device, thereby the device changes the temperature that the gas velocity changed liquid and thereby the condensation liquefaction that saturated vapor pressure reached liquid through the reducing between different air chambers. The device needs to pressurize gas, has narrow application range and cannot be matched and combined with the established equipment.
The utility model patent application CN108671697A proposes a method and a system for recycling and treating waste gas containing ammonia VOCs, in which multiple layers of folded plates are used to make the passing gas fully contact with the folded plates and capture and precipitate, and simultaneously, the filler is used to adsorb the residual liquid and ammonia gas in the gas to achieve the purpose of gas purification. The method has complex system and multiple steps, and increases the operation cost by adopting chemical reagents.
The utility model patent CN206701008U provides an utilize and take off liquid and take off dirt collecting system, device that the coupling of filtration system carries out gas-liquid separation again, and the gaseous entering first dust removal passageway of taking off of liquid and the second takes off liquid and takes off the dirt passageway and carry out the primary separation, then gets into cushion chamber, air filter, the filter plate that flow equalizes among the filtration system again in proper order and carry out deep purification through the method of filtering with gravity precipitation to the gaseous containing liquid. The device has a complex structure, the filter element needs to be replaced regularly, and self-cleaning cannot be carried out.
Therefore, in order to solve the above problems in the prior art, there is an urgent need in the art to develop a gas-liquid separation kit that has a simple structure, occupies a small area, has a self-cleaning liquid removal structure, and can be conveniently integrated with existing pipeline equipment.
SUMMERY OF THE UTILITY MODEL
The present disclosure provides a novel pumping outward petrochemical waste gas purification device, thereby solving the problems existing in the prior art.
The utility model provides an outer petrochemical industry exhaust gas purification device that arranges of suction, the device includes:
a package housing;
the rotary vane separator is arranged in the packaging shell and is used for primary separation for pumping the externally discharged petrochemical waste gas so as to remove large-particle-size liquid drops in the petrochemical waste gas;
the heterojunction fiber coalescence module is arranged on the upper part of the packaging shell and is used for carrying out advanced treatment on the liquid-containing gas separated by the rotary vane separator so as to further remove small-particle-size liquid drops in the liquid-containing gas; and
and the liquid discharge port is connected with the middle part of the packaging shell and is used for periodically discharging liquid from a liquid collecting tank into which liquid drops falling from the heterojunction fiber coalescence module to the rotary vane separator are separated and then led.
In a preferred embodiment, the spiral guide vane is contained in the rotary vane separator, and the vane is subjected to surface hydrophilicity modification.
In another preferred embodiment, the heterojunction fibers in the heterojunction fiber coalescence module are woven by mixing oleophilic and hydrophilic materials to realize self-cleaning property, and the coalescence of liquid drops is realized by adopting a heterojunction cross-weaving mode.
In another preferred embodiment, the pressure drop of the liquid-containing gas separated by the cyclone separator is not more than 200Pa, and the pressure drop of the liquid-containing gas purified by the heterojunction fiber coalescing module is not more than 100 Pa.
In another preferred embodiment, the rotary vane separation unit and the heterojunction fiber coalescence separation unit are connected in series, and a multi-stage series of 'rotary vane separation + fiber coalescence' can be arranged according to the requirement of working conditions so as to realize deep purification of the gas containing liquid.
In another preferred embodiment, the liquid drops separated from the waste gas after the waste gas is separated from the heterojunction fiber coalescence module through the rotary vane separator are guided by guide vanes of the rotary vane separator to move along the radial direction and migrate to the side wall, and then liquid collection and discharge are realized through the clamping groove type weir port.
In another preferred embodiment, the liquid-containing gas is in an upward, downward or parallel flow pattern to effect the liquid-depleted separation.
In another preferred embodiment, the liquid content of the liquid-containing gas after separation by the cyclone separator and the heterojunction fiber coalescing module is not more than 20mg/m3。
In another preferred embodiment, the distance between the rotary vane separator and the heterojunction fiber coalescing module can be adjusted to meet the requirements of clamping groove type liquid removal and drainage under different feeding working conditions.
In another preferred embodiment, the device is arranged in a horizontal and vertical manner.
Has the advantages that:
1) the device can synchronously realize the deep purification of the externally introduced petrochemical waste gas and the self cleaning of the liquid removal structure, and can realize the reinforced separation of the liquid-containing gas through the multistage series connection of the rotary vane separator and the fiber aggregation silk screen.
2) The device has the advantages of simple structure, high treatment efficiency, convenient maintenance and small occupied area, and can be directly combined with the existing equipment without major transformation.
Drawings
The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification to further illustrate the utility model and not limit the utility model.
Fig. 1 is a schematic structural view of a suction and discharge petrochemical exhaust gas purification apparatus according to an embodiment of the present invention.
Fig. 2 is a schematic process flow diagram of a suction efflux petrochemical exhaust gas purification according to another embodiment of the present invention.
Detailed Description
This application is to pump drainage petrochemical industry waste gas deliquiding and automatically cleaning demand, and the liquid drop in the mode desorption liquid-containing gas through spiral leaf separable set and heterojunction fibre series coupling makes the pump drainage petrochemical industry waste gas reach the standard that transports in succession.
In a first aspect of the present disclosure, there is provided a suction and exhaust petrochemical exhaust gas purification apparatus, comprising:
a package housing;
the rotary vane separator is arranged in the packaging shell and is used for primary separation of gas containing liquid so as to remove large-particle-size liquid drops in the gas;
the heterojunction fiber coalescence module is arranged on the upper part of the packaging shell and is used for carrying out advanced treatment on the liquid-containing gas separated by the rotary vane separator so as to further remove small-particle-size liquid drops in the liquid-containing gas and further realize the deep purification of the gas; and
and the liquid discharge port is connected with the middle part of the packaging shell and is used for periodically discharging liquid from a liquid collecting tank into which liquid drops falling from the heterojunction fiber coalescence module to the rotary vane separator are separated and then led.
In the disclosure, the spiral vane separator contains a spiral (three-vane) guide vane, and the vane is modified by surface hydrophilicity, and the liquid-containing gas moves upwards after passing through the guide vane and enters the liquid collecting tank.
In the present disclosure, the flow of the ducted separator inlet air is from bottom to top.
In the disclosure, the heterojunction fibers are woven by mixing oleophilic and hydrophilic materials to realize the self-cleaning property of the pipeline separator, and the coalescence of liquid drops is realized by adopting a heterojunction cross weaving mode.
In the disclosure, the blades of the rotary vane separator are subjected to oleophobic and hydrophobic synchronous modification so as to achieve the self-cleaning effect of the blades of the rotary vane separator.
In the present disclosure, the pressure drop of the liquid-containing exhaust gas separated by the rotary vane is not more than 200Pa, and the pressure drop of the liquid-containing exhaust gas purified by the heterojunction fibers is not more than 100 Pa.
In the present disclosure, the pipe separator may be arranged in a horizontal and vertical manner.
In a second aspect of the present disclosure, there is provided a suction emission petrochemical exhaust gas purification method, including the steps of:
(1) pumping the discharged oil-containing water-containing petrochemical waste gas, treating the pumped and discharged oil-containing water-containing petrochemical waste gas by a vane surface modified rotary vane separator, and collecting liquid drops falling off from the waste gas through a clamping groove type weir crest and continuously discharging the liquid drops outside;
(2) the pumped exhaust gas after the primary liquid removal of the rotary vane separator further passes through a heterojunction fiber module to realize the capture and coalescence of micro liquid drops in the exhaust gas, ensure the deep removal of a liquid phase in the exhaust gas, and separate liquid drops fall off from the surface of the heterojunction fiber to the rotary vane separator under the action of gravity; and
(3) the liquid drops falling to the rotary vane separator are separated and then guided into a liquid collecting tank, so that the waste gas is subjected to deep liquid removal and purification by repeated circulation.
In the disclosure, the combined pumping exhaust gas purification and separation process is formed by connecting a rotary vane separator and a heterojunction fiber coalescence-separation module in series, and a plurality of stages of 'rotary vane separation + fiber coalescence' in series can be arranged according to the working condition requirement so as to realize the deep purification of the externally introduced exhaust gas.
In the disclosure, the liquid drops separated from the waste gas by the combined process of the rotary vane separation and the heterojunction fiber separation move along the radial direction and migrate to the side wall under the guidance of the guide vane, and then the liquid collection and discharge are realized through the slot type weir crest.
In the disclosure, the liquid-containing waste gas can be separated by adopting an upward, downward or parallel flow mode in the pipeline type waste gas purification process.
In the present disclosure, the content of the externally introduced exhaust gas after separation by the cyclone and the heterojunction fibers is not more than 20mg/m3Preferably not more than 15mg/m3。
In this disclosure, the distance between the rotary vane separation blade and the heterojunction fiber module can be adjusted in the coupled waste gas liquid removal purification process to satisfy the clamping groove type liquid removal and liquid drainage requirements under different feeding working conditions.
In the present disclosure, the distance between the cyclone separator and the heterojunction fiber coalescing module is 1.5 times the height of the cyclone separator, so as to ensure the highest gas-liquid separation efficiency and the highest self-cleaning effect of the blades.
Reference is made to the accompanying drawings.
Fig. 1 is a schematic structural view of a suction and discharge petrochemical exhaust gas purification apparatus according to an embodiment of the present invention. As shown in fig. 1, the apparatus includes: the device comprises a packaging shell 1, a rotary vane separator 2 arranged in the packaging shell 1, a heterojunction fiber coalescence module 4 arranged at the upper part of the packaging shell 1, and a liquid discharge port 3 connected with the middle part of the packaging shell 1.
Fig. 2 is a schematic process flow diagram of a suction efflux petrochemical exhaust gas purification according to another embodiment of the present invention. As shown in fig. 2, the exhaust gas (pumped and discharged VOCs) pumped and discharged from the oil separation tank 11 is extracted by the fan 14 and then transported into the pipeline separator 12 through a pipeline, separated and purified by the vane separation blade and the heterojunction fiber coalescence module, and then passed through the flame arrester 13, wherein the liquid drops dropped from the heterojunction fiber coalescence module to the vane separator are separated and then guided into the liquid collection tank to be periodically drained through the liquid drainage port.
Examples
The utility model is further illustrated below with reference to specific examples. It is to be understood, however, that these examples are illustrative only and are not to be construed as limiting the scope of the present invention. Test methods in which specific conditions are not specified in the following examples are generally carried out under conventional conditions or under conditions recommended by the manufacturer. All percentages and parts are by weight unless otherwise indicated.
Example 1:
1. process flow
The embodiment is applied to the liquid removal and purification of the pumped-out VOCs in the oil separation tank covered by the oil refining sewage treatment plant of the oil refining integrated enterprise of 2300 ten thousand tons/year oil refining scale in Zhejiang. According to the present disclosure, a rotary vane separator coupled heterojunction fiber coalescing module is employed for deep removal of liquid from pumped exhaust. The liquid components in the exhaust gas are mainly hydrocarbons, water and micro suspended particulate matters, and the gas flow is 800m3H, the liquid content in the exhaust gas is generally not more than 500mg/m3。
2. Key equipment
The device is a pipeline type separator, and the lower part of a pipeline is provided with a rotary vane separating blade and a liquid discharge groove for collecting cyclone separation dehydration liquid, so that a preliminary waste gas separating unit is formed; the upper part of the pipeline is provided with a coalescence module woven by heterojunction fibers, so that the liquid-containing gas is deeply purified. In practical application, the purification efficiency can be improved through a mode of 'rotating vane separation + heterojunction fiber' multistage series connection according to different treatment effects.
3. Control of
Extracting the liquid-containing pumping exhaust gas by a fan, then feeding the extracted liquid-containing pumping exhaust gas into a rotary vane separator for primary separation of gas and liquid, separating large liquid drops from the gas under the action of centrifugal force of a rotational flow field, transferring the large liquid drops to the side wall of the separator, and finally feeding the large liquid drops into a liquid collecting tank; and pumping exhaust gas after primary separation enters the heterojunction fiber coalescence module again for deep purification so as to ensure that the liquid-containing exhaust gas reaches the standard and then is discharged to a flame arrester.
4. Operational effects
After the liquid-containing externally-introduced waste gas is subjected to multistage separation by a rotary vane separator and a coupling heterojunction aggregation module, the liquid content in the externally-introduced waste gas is less than 15mg/m3And the pressure drop of the liquid-containing waste gas after passing through the rotary vane separator is about 120Pa, the pressure drop of the liquid-containing waste gas after being treated by the heterojunction fibers is about 80Pa, and the total pressure drop meets the pressure requirement required by passing through the flame arrester.
In the embodiment, the whole set of process flow for pumping and exhausting waste gas, removing liquid and purifying is short, and purification of waste gas containing liquid introduced from outside and self-cleaning of a liquid removing structure can be synchronously realized in one set of equipment; meanwhile, the device has simple structure and small pressure drop in the treatment process, and can ensure that the conveying pipeline is continuously smooth. Experimental results show that the device can effectively reduce the liquid content of the liquid-containing pumping waste gas, and the treated pumping waste gas liquid content is less than 15mg/m3And the requirements of smooth air intake of the flame arrester and continuous outward transportation of VOCs are met. Meanwhile, the embodiment is formed by blending lipophilic and hydrophilic materials on the vane of the rotary vane separator and the coalescent fiber net, so that the adhesion of liquid on the vane of the rotary vane separator and the coalescent fiber net can be effectively reduced, and the aim of self-cleaning of a liquid removing structure is fulfilled.
The above-mentioned embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made according to the contents of the claims of the present invention should be considered to be within the technical scope of the present invention.
All documents referred to herein are incorporated by reference into this application as if each were individually incorporated by reference. Furthermore, it should be understood that various changes and modifications of the present invention can be made by those skilled in the art after reading the above teachings of the present invention, and these equivalents also fall within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A pumping and exhausting petrochemical waste gas purification device is characterized by comprising:
a package case (1);
the rotary vane separator (2) is arranged in the packaging shell (1) and is used for primary separation of pumping outward petrochemical waste gas so as to remove large-particle-size liquid drops in the outward petrochemical waste gas;
the heterojunction fiber coalescence module (4) is arranged on the upper part of the packaging shell (1) and is used for carrying out advanced treatment on the liquid-containing gas separated by the rotary vane separator (2) so as to further remove small-particle-size liquid drops in the liquid-containing gas; and
and the liquid discharge port (3) is connected with the middle part of the packaging shell (1) and is used for periodically discharging liquid from a liquid collecting tank into which liquid drops falling from the heterojunction fiber coalescence module (4) to the rotary vane separator (2) are separated and then led.
2. The apparatus of claim 1, wherein the rotating vane separator comprises a spiral guide vane, and the vane is surface hydrophilicity modified.
3. The apparatus of claim 1, wherein the heterojunction fibers in the heterojunction fiber coalescing module are woven with a mixture of oleophilic and hydrophilic materials to achieve self-cleaning properties, and coalescence of droplets is achieved by means of a heterojunction cross-weave.
4. The apparatus of claim 1 wherein the pressure drop of the liquid-containing gas separated by the cyclone separator is no greater than 200Pa and the pressure drop of the liquid-containing gas purified by the heterojunction fiber coalescing module is no greater than 100 Pa.
5. The device as claimed in claim 1, wherein the rotary vane separation unit and the heterojunction fiber coalescence separation unit are connected in series, and multiple stages of rotary vane separation and fiber coalescence can be arranged in series according to the requirements of working conditions so as to realize deep purification of the gas containing liquid.
6. The apparatus of claim 1, wherein the liquid droplets separated from the exhaust gas by the cyclone separator and the heterojunction fiber coalescing module move in a radial direction and migrate to the sidewall by being guided by guide vanes of the cyclone separator, and then are discharged and collected by a trough weir.
7. The apparatus of claim 1 wherein the liquid-containing gas is in an upward, downward or parallel flow pattern to effect the liquid-depleted separation.
8. The apparatus of claim 1 wherein the liquid-containing gas separated by the cyclone separator and the heterojunction fiber coalescing module has a liquid content of no greater than 20mg/m3。
9. The apparatus of claim 1, wherein the separation distance between the spiral vane separator and the heterojunction fiber coalescing module is adjustable to meet the requirements of slot type liquid removal and drainage under different feeding conditions.
10. The apparatus of claim 1, wherein the apparatus is arranged in a horizontal and vertical manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122306656.4U CN216171020U (en) | 2021-09-23 | 2021-09-23 | Petrochemical waste gas purification device with suction and exhaust functions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122306656.4U CN216171020U (en) | 2021-09-23 | 2021-09-23 | Petrochemical waste gas purification device with suction and exhaust functions |
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| Publication Number | Publication Date |
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| CN216171020U true CN216171020U (en) | 2022-04-05 |
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| CN202122306656.4U Active CN216171020U (en) | 2021-09-23 | 2021-09-23 | Petrochemical waste gas purification device with suction and exhaust functions |
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