CN112893338A - Device and method for treating blocked pipeline for propane dehydrogenation propylene preparation device - Google Patents
Device and method for treating blocked pipeline for propane dehydrogenation propylene preparation device Download PDFInfo
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- CN112893338A CN112893338A CN202110306721.5A CN202110306721A CN112893338A CN 112893338 A CN112893338 A CN 112893338A CN 202110306721 A CN202110306721 A CN 202110306721A CN 112893338 A CN112893338 A CN 112893338A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
- B08B15/04—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
- B08B7/0064—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes
- B08B7/0071—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by temperature changes by heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
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- Mechanical Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention provides a device and a method for treating a blocked pipeline for a device for preparing propylene by propane dehydrogenation, relates to the technical field of preparing propylene by propane dehydrogenation, and provides a device and a method for treating a pipeline blocked by a propylene polymer. The device includes the support frame, heating device, exhaust treatment device, air feeder, waste collection device and heat preservation device, wherein, the bare pipeline that blocks up is the tilt state and supports on the support frame, heating device sets up on the bare pipeline that blocks up and heating device can heat the bare pipeline that blocks up in order to be used for making the propylene polymer in the bare pipeline that blocks up flow into waste collection device, exhaust treatment device and air feeder set up the both ends at the bare pipeline that blocks up respectively, exhaust treatment device can collect the waste gas that produces when heating the bare pipeline that blocks up, air feeder can be to the collection of the bare pipeline interior carrier gas of blocking up in order to be favorable to waste gas waste liquid. The invention is used for cleaning pipelines blocked by propylene polymer.
Description
Technical Field
The invention relates to the technical field of propylene preparation by propane dehydrogenation, in particular to a device for treating a blocked pipeline for a propylene preparation device by propane dehydrogenation and a method for treating the blocked pipeline.
Background
The propane dehydrogenation propylene preparation device comprises a set of wastewater treatment system, wherein a wastewater stripping tower is responsible for stripping organic matters in wastewater. In practice, it has been found that the use of the gas phase line of the wastewater stripper over time is blocked by propylene polymer, and although various methods have been used to slow down the process of gas phase line blockage, the problem of blockage is still unavoidable. The organic polymer blocking the pipeline should be subjected to hazardous waste treatment according to the regulations, but for a single-section pipeline with the length of more than 9 m, the organic polymer does not belong to hazardous waste and is difficult to treat according to a traditional hazardous waste treatment method, and the effect of a high-pressure water gun cleaning method commonly used in the industry on cleaning the polymer inside the pipeline is very little through practical inspection, and the blocked pipeline can only be stored, so that the site space of an enterprise is occupied, and potential safety and environmental protection hazards are brought.
Disclosure of Invention
The invention aims to provide a device and a method for treating a blocked pipeline for a device for preparing propylene by propane dehydrogenation, and provides a device and a method for treating a pipeline blocked by a propylene polymer. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a treatment device for a blocked pipeline of a device for preparing propylene by propane dehydrogenation, which comprises a support frame, a heating device, a waste gas treatment device, a gas supply device, a waste collection device and a heat preservation device, wherein the plugged bare pipe is supported on the support frame in an inclined state, the heating device is disposed on the plugged bare pipe and can heat the plugged bare pipe for causing the propylene polymer in the plugged bare pipe to flow into the waste collection device, the heat preservation device wraps the plugged bare pipeline for heat preservation during heating, the waste gas treatment device and the gas supply device are respectively arranged at two ends of the plugged bare pipeline, the waste gas treatment device can collect and heat waste gas generated in the process of heating the blocked bare pipeline, and the gas supply device can convey gas into the blocked bare pipeline so as to be beneficial to collecting waste gas and waste liquid.
Furthermore, one end of the blocked bare pipeline is high, the other end of the blocked bare pipeline is low and is in an inclined state, and the inclination angle range of the blocked bare pipeline is 15-30 degrees.
Further, the support frame comprises a first support and a second support, the height of the first support is larger than that of the second support, the first support and the second support are respectively used for supporting different areas of the plugged bare pipeline, and the first support is abutted to a flange plate at one end, with the high position, of the bare pipeline.
Further, the heating device comprises a heating tape wound around the plugged bare pipe; the heating belt is spirally wound on the plugged bare pipeline, and the distance between two adjacent spirals of the heating belt is 0.6-1.5 mm; the heat preservation device is heat preservation cotton, the bare pipeline that blocks up is wrapped up with the heat preservation device just the heating tape is located in the heat preservation device.
Furthermore, the high one end in naked pipeline position of jam is provided with the ring flange, install the valve body on the ring flange, the valve body with gas supply unit is connected, gas supply unit can to provide low pressure inert gas in the naked pipeline of jam.
Further, the waste gas treatment device comprises VOC treatment equipment and a protective cover, wherein the protective cover is arranged at the lower end of the blocked bare pipeline, and the protective cover is connected with the VOC treatment equipment through a pipeline; the protective cover is provided with a waste liquid discharge hole which is communicated with the waste collection device; and an observation window is also arranged on the protective cover, and the liquid discharge condition of the blocked bare pipeline can be observed through the observation window.
Furthermore, the device for processing the blocked pipeline further comprises a high-pressure water gun, and the high-pressure water gun is used for flushing the heated bare pipeline.
A method for treating a blocked pipe by using the blocked pipe treatment device, comprising the following steps: supporting the plugged bare pipeline to be treated on the support frame in an inclined state; connecting the heating device, the waste gas treatment device and the gas supply device to the plugged bare pipeline, and placing the waste collection device in place; heating the plugged bare pipeline through the heating device to enable the solid propylene polymer of the bare pipeline to flow into the waste collection device, inputting low-pressure inert gas into the bare pipeline through the gas supply device for promoting the outflow of liquefied polymer and realizing inert gas protection, and collecting waste gas generated during heating through the waste gas treatment device.
Further, the method specifically comprises the following steps: removing the insulated, electrostatic cross-over of the plugged pipe surface to form the bare pipe; fixing the bare pipeline on the support frame in an inclined state, wherein the inclination angle is 15-30 degrees; spirally winding the heating belt of the heating device on the outer wall of the whole bare pipeline; a valve body is additionally arranged on the higher side of the bare pipeline, and the valve body is connected with the gas supply device; placing a waste collection device with the volume larger than the internal volume of the bare pipeline below one side of the lower end of the bare pipeline, wherein a garbage bag for containing hazardous wastes is placed in the waste collection device; arranging a protective cover of the waste gas treatment device at one side of the lower end of the bare pipeline, wherein a waste liquid discharge hole of the protective cover is positioned above the waste collection device; wrapping the bare pipeline with heat-insulating cotton; the heating device is used for heating the bare pipeline to a certain temperature, the temperature is maintained, when the polymer in the bare pipeline is melted, the polymer can flow into the waste collection device below under the action of gravity, meanwhile, part of the polymer is volatilized into a gas phase, and the waste gas and the gas input into the bare pipeline by the gas supply device are collected by the waste gas treatment device.
Further, the method further comprises the following: if no polymer flows out of the bare pipeline, after waiting for a certain time, stopping the heating device, cooling the bare pipeline, dismantling the heating device, the waste gas treatment device and the gas supply device, and then placing the bare pipeline aside for cleaning; the cleaning method specifically comprises the following steps: and cleaning the cooled bare pipeline by using a high-pressure water gun, filtering the cleaned water and then discharging the filtered water to a sewage treatment system, and filtering the solid obtained by cleaning the water to treat the solid dangerous waste.
The invention provides a blocked pipeline treatment device for a propane dehydrogenation propylene preparation device, which comprises a support frame, a heating device, a waste gas treatment device, a gas supply device, a waste collection device and a heat preservation device, wherein a blocked bare pipeline is supported on the support frame in an inclined state, the heat preservation and electrostatic bridging on the surface of the blocked pipeline are removed to form a bare pipeline, the heating device is arranged on the blocked bare pipeline and can heat the blocked bare pipeline so that propylene polymers in the blocked bare pipeline can flow into the waste collection device, the heat preservation device wraps the bare pipeline so as to preserve heat, the waste gas treatment device is arranged at the lower end of the blocked bare pipeline, the gas supply device is arranged at the higher end of the blocked bare pipeline, the waste gas treatment device can collect waste gas generated when the blocked bare pipeline is heated, part of the polymers volatilizes into a gas phase when the bare pipeline is heated, in order to avoid environmental pollution, an exhaust gas treatment device is additionally arranged, a gas supply device can convey gas into a blocked bare pipeline to facilitate collection of exhaust gas and waste liquid, low-pressure gas can be conveyed into the blocked bare pipeline through the gas supply device, micro-positive pressure inert gas (the inert gas is preferably nitrogen and cannot be in overpressure) is introduced into the gas supply device, outflow of liquefied polymer can be promoted to a certain extent, on one hand, the gas replacement effect is achieved, the whole heating process is under the protection of the inert gas, and the exhaust gas generated by heating the polymer belongs to organic exhaust gas and has the properties of flammability and explosiveness, so that the protection of the inert gas is needed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a plugged pipe processing apparatus for a propane dehydrogenation propylene production apparatus according to an embodiment of the present invention.
FIG. 1-support shelf; 11-a first support; 12-a second scaffold; 2-heating a belt; 3-a waste collection device; 4-bare pipe; 5-an exhaust gas treatment device; 51-a VOC treatment facility; 52-a protective cover; 6-an air supply device; 7-a heat preservation device; 8-valve body.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Referring to fig. 1, the invention provides a blocked pipeline processing device for a propane dehydrogenation propylene production device, comprising a support frame 1, a heating device, a waste gas processing device 5, a gas supply device 6, a waste collection device 3 and a heat preservation device 7, wherein a blocked bare pipeline 4 is supported on the support frame 1 in an inclined state, the heat preservation and electrostatic bridging on the surface of the blocked pipeline are removed to form the bare pipeline 4, the heating device is arranged on the blocked bare pipeline 4 and can heat the blocked bare pipeline 4 so as to enable propylene polymers in the blocked bare pipeline 4 to flow into the waste collection device 3, the heat preservation device 7 wraps the blocked bare pipeline 4 for heat preservation during heating, the blocked bare pipeline 4 is heated by the heating device and is preserved by the heat preservation device 7 so as to enable the polymers in the bare pipeline 4 to be melted and flow into the waste collection device 3 below under the action of gravity, waste gas treatment device 5 and air feeder 6 set up respectively at the both ends of the bare pipeline 4 that blocks up, waste gas treatment device 5 sets up the one end that the bare pipeline 4 that blocks up is low in position, air feeder 6 sets up the one end that the bare pipeline 4 that blocks up is high in position, waste gas that waste gas treatment device 5 can produce when heating the bare pipeline 4 that blocks up, when heating bare pipeline 4, the polymer will progressively liquefy with the temperature rising and flow, produce waste gas simultaneously, in order to avoid the pollution of environment, waste gas treatment device 5 has been add, air feeder 6 can be to the collection of the bare pipeline 4 that blocks up in order to be favorable to waste gas waste liquid. Low-pressure gas can be supplied into the plugged bare pipe 4 by the gas supply device 6, so that the waste gas in the bare pipe 4 and the molten polymer flow out of the bare pipe 4. The gas supply device 6 is filled with micro-positive pressure inert gas (the inert gas is preferably nitrogen and cannot be overpressurized), which can promote the liquefied polymer to flow out to a certain extent, on one hand, the gas replacement effect is achieved, so that the whole heating process is under the protection of the inert gas, and the waste gas generated by heating the polymer belongs to organic waste gas and has the properties of flammability and explosiveness, so that the protection of the inert gas is needed.
In an alternative embodiment, the plugged bare pipeline 4 is inclined with one end higher and the other end lower, and the inclination angle of the plugged bare pipeline 4 ranges from 15 ° to 30 °. The inclination angle of the bare pipe 4 is preferably set to between 15 ° and 30 ° in consideration of the flow of the molten polymer under the action of gravity and in consideration of safety and ease of handling. Of course, the inclination angle of the bare pipe 4 is not limited to 15 ° to 30 °, and may be any angle value other than the angle range.
As an alternative embodiment, referring to fig. 1, the structure of the supporting frame 1 is simply illustrated, the supporting frame 1 comprises a first bracket 11 and a second bracket 12, the height of the first bracket 11 is greater than that of the second bracket 12, the first bracket 11 and the second bracket 12 are respectively used for supporting on different areas of the plugged bare pipe 4, and the first bracket 11 is abutted with a flange plate at one end of the bare pipe 4 which is higher. The bare pipe 4 is inclined by the supporting action of the first and second supports 11 and 12. In addition, a connection flange is generally provided at an end of the bare pipe 4, and in order to prevent the bare pipe 4 supported by the supporting frame 1 from sliding in an oblique direction, the connection flange at the tip of the bare pipe 4 is brought into contact with the first bracket 11 to regulate the orientation of the bare pipe 4 in the axial direction.
As an optional embodiment, the heating device includes a heating belt 2 (the heating belt 2 is an electrical heating belt), the heating belt 2 is wound on the plugged bare pipeline 4, the heating belt 2 can be uniformly wound on the plugged bare pipeline 4 in a spiral shape, and the distance between two adjacent spirals of the heating belt 2 is 0.6mm to 1.5mm, for example, the distance between two adjacent spirals of the heating belt 2 can be 1mm, which is beneficial to uniformly heating the plugged bare pipeline 4, the heating belt 2 is connected with a power supply device, after the power supply device is tested normally, the heating temperature can be set to about 200 ℃ (and attention is paid to leakage protection), in addition, the heat preservation device 7 is preferably made of heat preservation cotton, the plugged bare pipeline 4 is wrapped with heat preservation cotton, and the heating belt 2 is located in the heat preservation cotton, the thickness of the heat preservation cotton can be 50mm, and the heat preservation cotton can be reused.
The connection of the gas supply device 6 to the bare pipe 4 may be specifically as follows: the high end of the naked pipeline 4 that blocks up is provided with the ring flange, installs valve body 8 on the ring flange, and valve body 8 is connected with air feeder 6, and air feeder 6 can provide low pressure nitrogen gas in the naked pipeline 4 that blocks up to in the naked pipeline 4 of waste gas and the fused polymer outflow in the naked pipeline 4 of being convenient for. Furthermore, a pressure reducing valve can be connected between the gas supply 6 and the valve body 8.
As for the connection of the exhaust gas treatment device 5 and the bare pipe 4, specifically, the following may be mentioned: the waste gas treatment device 5 comprises VOC treatment equipment 51 and a protective cover 52, wherein the protective cover 52 is arranged at the lower end of the blocked bare pipeline 4, the protective cover 52 and the bare pipeline 4 are preferably subjected to sealing treatment, and the protective cover 52 is connected with the VOC treatment equipment 51 through a pipeline; the protective cover 52 is provided with a waste liquid discharge hole which is communicated with the waste collection device 3, and the protective cover 52 and the waste collection device 3 are preferably subjected to sealing treatment; the protective cover 52 is also provided with an observation window, which can be a visual glass window, and the liquid discharge condition of the blocked bare pipeline 4 can be observed through the observation window. If no polymer flows out of the bare pipeline 4, after waiting for a certain time, the heating device stops working, the bare pipeline 4 is cooled, and the heating device, the waste gas treatment device 5 and the gas supply device 6 are dismantled and then the bare pipeline 4 is placed aside for cleaning. Preferably, the device for processing the blocked pipeline further comprises a high-pressure water gun for washing the heated bare pipeline 4. Bare pipeline 4 after cooling is washd with high-pressure squirt, and after bare pipeline 4 heats and accomplishes, the overwhelming majority blocks up in the solid can flow waste collection device 3, and waste in the waste collection device 3 can be broken back and useless according to the solid danger and handle, and a small amount of polymer glues on bare pipeline 4's pipe wall, can wash with the high-pressure squirt this moment, washs easily, and the cleanliness of bare pipeline 4 after the washing can reach the degree of brand-new pipeline basically. Of course, in the cleaning process, attention is paid to collect the cleaned water, the cleaned water is filtered by a filter screen, the solid obtained by filtering is treated according to solid dangerous waste, and the filtered water is sent to a sewage treatment system (different bare pipes 4 can be cleaned by water repeatedly, and the cleaned water is preferably treated after all bare pipes 4 are cleaned, so as to reduce the generation of waste water, and if too many cleaning pipelines are needed, the cleaning water can be replaced in the middle).
A method of treating a plugged conduit with a plugged conduit treatment device, comprising: supporting a to-be-treated blocked bare pipeline 4 on a support frame 1 in an inclined state; connecting a heating device, an exhaust gas treatment device 5 and an air supply device 6 to the blocked bare pipeline 4, and placing the waste collection device 3 in place; the plugged bare pipe 4 is heated by a heating device so that the solid propylene polymer of the bare pipe 4 flows into the waste collection device 3, a gas supply device 6 inputs low-pressure inert gas into the bare pipe 4 for promoting the outflow of liquefied polymer and realizing inert gas protection, and waste gas generated during heating is collected by a waste gas treatment device 5. The method specifically comprises the following steps: removing the thermal insulation and electrostatic bridging on the surface of the blocked pipeline to form a bare pipeline 4; fixing the bare pipeline 4 on the support frame 1 in an inclined state, wherein the inclination angle is 15-30 degrees; spirally winding a heating belt 2 of a heating device on the outer wall of the whole bare pipeline 4; a valve body 8 is additionally arranged on the higher side of the bare pipeline 4, the valve body 8 is connected with a gas supply device 6, and the gas supply device 6 is used for introducing micro-positive pressure inert gas into the bare pipeline 4; a waste collection device 3 with the volume larger than the internal volume of the bare pipeline 4 is arranged below one side of the lower end of the bare pipeline 4, and a garbage bag for containing hazardous wastes is arranged in the waste collection device 3; arranging a protective cover 52 of the waste gas treatment device 5 at one side of the lower end of the bare pipeline 4, wherein a waste liquid discharging hole of the protective cover 52 is positioned above the waste collection device 3; wrapping the bare pipeline 4 with heat-insulating cotton; the power supply unit debugging is normal, and the settlement heating temperature is 200 ℃ (and notice earth leakage protection), and during the heating, the polymer can flow along with the gradual liquefaction of temperature rise, can flow to the waste collection device 3 of below under the effect of gravity in, heating in-process part polymer volatilizees for the gaseous phase, and waste gas passes through exhaust treatment device 5 and collects.
After a period of time, if no polymer flows out of the bare pipeline 4, waiting for a certain period of time, stopping the heating device, cooling the bare pipeline 4, removing the heating device, the waste gas treatment device 5 and the gas supply device 6, and then placing the bare pipeline 4 aside for cleaning; the cleaning method specifically comprises the following steps: and cleaning the cooled bare pipeline 4 by using a high-pressure water gun, filtering the cleaned water, discharging the filtered water to a sewage treatment system, and filtering the solid obtained by cleaning the water to treat the solid waste according to the solid danger.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A device for processing a blocked pipeline for a device for preparing propylene by propane dehydrogenation is characterized by comprising a support frame (1), a heating device, a waste gas processing device (5), an air supply device (6), a waste collection device (3) and a heat preservation device (7), wherein,
the bare pipe (4) of jam is the tilt state support and is in on support frame (1), heating device sets up just on the bare pipe (4) of jam heating device can heat bare pipe (4) of jam is in order to be used for making propylene polymer in the bare pipe (4) of jam flows in waste collection device (3), heat preservation device (7) parcel the heat preservation of bare pipe (4) of jam in order to be used for the heating, exhaust treatment device (5) and air feeder (6) set up respectively the both ends of bare pipe (4) of jam, exhaust treatment device (5) can collect the heating the waste gas that produces during bare pipe (4) of jam, air feeder (6) can to carry gas in bare pipe (4) of jam so that the collection of waste gas waste liquid.
2. The apparatus for treating a plugged pipeline for an apparatus for producing propylene by propane dehydrogenation according to claim 1, wherein the plugged bare pipeline (4) has a high end and a low end and is inclined, and the angle of inclination of the plugged bare pipeline (4) is in the range of 15 ° to 30 °.
3. The device for treating the blocked pipeline in the device for preparing propylene by propane dehydrogenation according to claim 1 or 2, wherein the support frame (1) comprises a first support (11) and a second support (12), the height of the first support (11) is greater than that of the second support (12), the first support (11) and the second support (12) are respectively used for supporting on different areas of the blocked bare pipeline (4), and the first support (11) is abutted with a flange plate at one end of the bare pipeline (4) which is higher.
4. The device for treating the blocked pipeline for the propane dehydrogenation propylene production device according to claim 1, wherein the heating device comprises a heating belt (2), and the heating belt (2) is wound around the blocked bare pipeline (4);
the heating belt (2) is spirally wound on the plugged bare pipeline (4), and the distance between two adjacent spirals of the heating belt (2) is 0.6-1.5 mm;
the heat preservation device (7) is heat preservation cotton, the blocked bare pipeline (4) is wrapped with the heat preservation device (7) and the heating belt (2) is located in the heat preservation device (7).
5. The device for treating the blocked pipeline for the device for preparing propylene by propane dehydrogenation according to claim 1, wherein a flange is arranged at the high end of the blocked bare pipeline (4), a valve body (8) is arranged on the flange, the valve body (8) is connected with the gas supply device (6), and the gas supply device (6) can supply low-pressure inert gas into the blocked bare pipeline (4).
6. The apparatus for treating a blocked pipeline for a propane dehydrogenation propylene production apparatus according to claim 1, wherein the off-gas treatment apparatus (5) comprises a VOC treatment device (51) and a shield (52), the shield (52) is disposed at the lower end of the blocked bare pipeline (4), and the shield (52) is connected to the VOC treatment device (51) through a pipeline;
the protective cover (52) is provided with a waste liquid discharge hole which is communicated with the waste collection device (3);
the protective cover (52) is also provided with an observation window, and the liquid discharge condition of the blocked bare pipeline (4) can be observed through the observation window.
7. The device for processing the blocked pipeline for the propane dehydrogenation propylene production device according to claim 1, further comprising a high-pressure water gun for flushing the heated bare pipeline (4).
8. A method of treating a plugged pipe using a plugged pipe treatment device according to any one of claims 1-7, comprising:
supporting a to-be-treated blocked bare pipeline (4) on the support frame (1) in an inclined state;
-connecting the heating means, the exhaust gas treatment means (5) and the gas supply means (6) to the plugged bare pipe (4), placing the waste collection means (3) in position;
heating the plugged bare pipe (4) by the heating device so that the solid propylene polymer of the bare pipe (4) flows into the waste collection device (3), the gas supply device (6) inputting a low-pressure inert gas into the bare pipe (4) for promoting the outflow of liquefied polymer and achieving inert gas protection, and the exhaust gas generated during heating is collected by the exhaust gas treatment device (5).
9. The method according to claim 8, characterized in that it comprises in particular the following:
removing the insulated, electrostatic cross-over of the plugged pipe surface to form the bare pipe (4);
fixing the bare pipeline (4) on the support frame (1) in an inclined state, wherein the inclination angle is 15-30 degrees;
spirally winding a heating belt (2) of the heating device on the outer wall of the whole bare pipeline (4);
a valve body (8) is additionally arranged on the higher side of the bare pipeline (4), and the valve body (8) is connected with the gas supply device (6);
placing a waste collection device (3) with the volume larger than the internal volume of the bare pipeline (4) below one side of the lower end of the bare pipeline (4), and placing a garbage bag for containing hazardous wastes in the waste collection device (3);
arranging a protective cover (52) of the waste gas treatment device (5) at the lower end side of the bare pipeline (4), wherein a waste liquid discharge hole of the protective cover (52) is positioned above the waste collection device (3);
wrapping the bare pipeline (4) with heat-insulating cotton;
heating the bare pipeline (4) to a certain temperature by the heating device, maintaining the temperature, enabling the polymer in the bare pipeline (4) to flow into the waste collection device (3) below under the action of gravity when the polymer is melted, simultaneously volatilizing part of the polymer into a gas phase, and collecting waste gas and gas input into the bare pipeline (4) by the gas supply device (6) through the waste gas treatment device (5).
10. The method of claim 9, further comprising: if no polymer flows out of the bare pipeline (4), after a certain time, stopping the heating device, cooling the bare pipeline (4), dismantling the heating device, the waste gas treatment device (5) and the gas supply device (6), and then placing the bare pipeline (4) aside for cleaning;
the cleaning method specifically comprises the following steps: and cleaning the cooled bare pipeline (4) by using a high-pressure water gun, filtering the cleaned water and then discharging the filtered water to a sewage treatment system, and filtering the solid obtained by cleaning the water to treat the solid dangerous waste.
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| CN202110306721.5A CN112893338A (en) | 2021-03-23 | 2021-03-23 | Device and method for treating blocked pipeline for propane dehydrogenation propylene preparation device |
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| CN202110306721.5A CN112893338A (en) | 2021-03-23 | 2021-03-23 | Device and method for treating blocked pipeline for propane dehydrogenation propylene preparation device |
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| CN214638803U (en) * | 2021-03-23 | 2021-11-09 | 天津渤海石化有限公司 | Device for treating blocked pipeline for propane dehydrogenation propylene preparation device |
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