CN216113343U - Nitrogen purging system of bimetal full-capacity tank - Google Patents
Nitrogen purging system of bimetal full-capacity tank Download PDFInfo
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- CN216113343U CN216113343U CN202122111870.4U CN202122111870U CN216113343U CN 216113343 U CN216113343 U CN 216113343U CN 202122111870 U CN202122111870 U CN 202122111870U CN 216113343 U CN216113343 U CN 216113343U
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Abstract
The utility model provides a nitrogen purging system of a bimetal full-capacity tank, and belongs to the technical field of low-temperature storage tanks. It has solved the current problem that the system exists to sweep inefficiency, sweep the quality poor that sweeps. This nitrogen gas system of sweeping of bimetal full-capacity jar, sweep the structure including the main tank, the intermediate layer sweeps the structure and the bottom heat insulation layer sweeps the structure, the main tank sweeps the structure and sweeps the structure sharing main tank with the intermediate layer and sweeps the admission line, the bottom heat insulation layer sweeps the structure and sweeps the pipeline and the bottom heat insulation layer sweeps the pipeline of giving vent to anger including the bottom heat insulation layer sweep admission line, the bottom heat insulation layer sweeps the end of giving vent to anger of admission line and the bottom heat insulation layer sweeps the pipeline intercommunication, the bottom heat insulation layer sweeps and has a plurality of first ventholes on the pipeline. The utility model can respectively sweep the main container and the bottom heat insulation layer, has high sweeping efficiency, reasonable structural design, more uniform sweeping and good sweeping effect on local areas, reduces the potential safety hazard and improves the overall performance of the full-capacity tank.
Description
Technical Field
The utility model belongs to the technical field of low-temperature storage tanks, and relates to a nitrogen purging system of a bimetallic full-capacity tank.
Background
With the continuous development of the low-temperature industrial chain in China, the design and construction technology of large-scale low-temperature normal-pressure storage equipment is mature day by day, and the equipment structure is gradually changed from a single-capacity tank to a full-capacity tank. After the storage tank is built and before the storage tank is put into use, drying and blowing are needed, and the main blowing part comprises a main container, a barrel interlayer and a bottom heat insulation layer (an upper layer area and a lower layer area of the bottom are protected by containing a hot angle). The rationality of the purge system architecture directly determines purge cost investment, purge time, and post-tank performance.
For example, chinese patent discloses a nitrogen displacement structure of a large-sized low-temperature full-capacity tank [ application publication No. CN110159915A ], which includes a main-tank purging structure, a cylinder interlayer purging structure, and a bottom heat-insulating layer purging structure. The main container purging structure comprises a replacement air inlet pipe and a high-point vent pipe, and nitrogen enters the main container through the replacement air inlet pipe during purging and is discharged through the high-point vent pipe. The barrel interlayer purging structure comprises a replacement air inlet pipe and an annular space exhaust pipe, and nitrogen enters the main container and the barrel interlayer from the replacement air inlet pipe in sequence during purging and is discharged from the annular space exhaust pipe. The bottom heat insulation layer purging structure comprises a replacement air inlet pipe, an exhaust grid and a hot angle protection exhaust pipe, nitrogen enters the main container, the barrel interlayer, the foam glass brick and the exhaust grid in sequence through the replacement air inlet pipe during purging, and is discharged through the hot angle protection exhaust pipe.
Because the bottom heat insulation layer and the main container share one replacement air inlet pipe, the coverage area of a purging loop is small, the purging quality is poor, and the purging efficiency is low; when the heat insulating layer at the bottom is purged, the nitrogen used for purging the main container is utilized, the drying degree and the temperature are not as good as the quality of an external nitrogen purging source, and the purging quality cannot be ensured.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a nitrogen purging system of a bimetal full-capacity tank, which has high purging efficiency and aims to solve the problems in the prior art.
The purpose of the utility model can be realized by the following technical scheme:
double metal holds nitrogen gas purging system of jar entirely, sweep structure, intermediate layer and bottom heat insulation layer including the main container and sweep the structure, the main container sweeps the structure and sweeps the structure sharing main container with the intermediate layer and sweeps the admission line, the bottom heat insulation layer sweeps the structure and includes that the bottom heat insulation layer sweeps the admission line, is located the intraformational bottom heat insulation layer of bottom heat insulation and sweeps the pipeline and the admission end is located the intraformational bottom heat insulation layer of bottom heat insulation and sweeps the pipeline of giving vent to anger, the end of giving vent to anger that the bottom heat insulation layer sweeps the admission line sweeps the pipeline intercommunication with the bottom heat insulation layer, the bottom heat insulation layer sweeps and has a plurality of first ventholes on the pipeline.
The purging air inlet pipe for the main container is purged through the main container to introduce nitrogen, the purging air inlet pipe for the bottom heat insulation layer is purged through the bottom heat insulation layer to introduce nitrogen, the purging air inlet pipe for the main container and the bottom heat insulation layer is independently arranged, the purging air inlet pipe for the main container and the purging air inlet pipe for the bottom heat insulation layer can be used for purging the main container and the bottom heat insulation layer respectively, and purging efficiency is high.
In the nitrogen purging system of the above-mentioned bimetal full-capacity tank, the bottom heat insulation layer has a plurality of outlet pipes that sweep the pipeline intercommunication with the bottom heat insulation layer on sweeping the pipeline, the outlet pipe is kept away from the one end shutoff that the bottom heat insulation layer swept the pipeline, the lateral wall of outlet pipe is equipped with above-mentioned first venthole, be equipped with on the outlet pipe and be used for covering the miscellaneous ventilative structure of preventing of first venthole.
The outlet pipe is the nozzle stub, and its one end of keeping away from bottom heat insulation layer purge pipeline stretches into bottom heat insulation layer, because first venthole is located the lateral wall of outlet pipe, conveniently covers first venthole, will prevent during the installation that miscellaneous ventilative structure twines on the outlet pipe can, simple to operate.
In the nitrogen purging system of the bimetallic full-capacity tank, the head end and the tail end of the bottom heat-insulating layer purging pipeline are connected to form a closed-loop structure, the closed-loop structure is symmetrically arranged along the central line of the main container, and the outlet pipes are annularly and uniformly distributed along the central line of the main container.
The closed-loop structure may be a circle or other regular polygon structure, such as a square, a regular hexagon, a regular triangle, etc., preferably a circle. In order to realize uniform air inlet, the bottom heat insulation layer purging pipeline can be arranged into other shapes, such as an I shape, a Z shape, an S shape and the like, and a plurality of outlet pipes are symmetrically distributed along the central line of the main container.
In the nitrogen purging system of the double-metal full-capacity tank, the bottom heat-insulating layer is used for purging the gas outlet pipeline and is a plurality of, the gas inlet end of the gas outlet pipeline purged by the bottom heat-insulating layer is uniformly distributed along the central line of the main container in an annular manner, and the gas outlet pipeline purged by the bottom heat-insulating layer and the outlet pipes are arranged in a staggered manner. The air outlet is more uniform, the purging area is increased, and the purging quality is improved.
In the nitrogen purging system of the above-mentioned bimetal full-capacity tank, the bottom heat insulation layer has a plurality of outlet pipes that sweep the pipeline intercommunication with the bottom heat insulation layer on sweeping the pipeline, first venthole is located the outlet pipe and is kept away from the one end that the bottom heat insulation layer swept the pipeline, be equipped with on the outlet pipe and be used for hiding the miscellaneous ventilative structure of preventing of first venthole.
The anti-impurity ventilating structure prevents the glass fiber cotton or other impurities in the bottom heat insulating layer from blocking the first air outlet and enables nitrogen to pass through, the structure form of the anti-impurity ventilating structure can be various, and the anti-impurity ventilating structure takes glass fiber cloth and cloth-based adhesive tape as the anti-impurity ventilating structure and bundles the anti-impurity ventilating structure on the outlet pipe when in use.
In the nitrogen purging system of the bimetal full-capacity tank, the main container purging structure comprises a main container purging air inlet pipeline and a main container purging air outlet pipeline, the air outlet end of the main container purging air inlet pipeline is connected with the main container purging pipeline located at the bottom in the main container, and the main container purging pipeline is provided with a plurality of second air outlet holes. The main container purging air outlet pipeline is positioned above the ribbed arched top cover.
In the nitrogen purging system of the bimetal full-capacity tank, the purging pipeline of the main container comprises a horizontal pipeline extending horizontally and two longitudinal pipelines extending horizontally, the air outlet end of the purging air inlet pipeline of the main container is communicated with the middle of the horizontal pipeline, one end of each of the transverse pipelines is communicated with the middle of one of the longitudinal pipelines, the other end of each of the transverse pipelines is communicated with the middle of the other longitudinal pipeline, and the two longitudinal pipelines are symmetrically arranged along the central line of the main container.
In the nitrogen purging system of the bimetal full-capacity tank, two ends of the longitudinal pipeline are plugged, and the second air outlets are uniformly distributed on the lower side of the purging pipeline of the main container.
The main container purging pipeline can be replaced by other main container purging pipelines, for example, the main container purging pipeline is annular, the annular main container purging pipeline and the main container are concentrically arranged, and the second air outlet holes are annularly and uniformly distributed.
The H-shaped or annular purging structure is changed from linear purging, the number of the second air outlet holes is increased, the purging coverage area is enlarged, the purging efficiency is improved, and the purging effect is improved.
In the nitrogen purging system of the bimetal full-capacity tank, the interlayer purging structure comprises an annular purging pipeline positioned in the interlayer and an interlayer purging air outlet pipeline of which the air inlet end is communicated with the annular purging pipeline, a plurality of air inlets are formed in the bottom of the annular purging pipeline, and an impurity-preventing and ventilating structure is also arranged at the air inlet.
The anti-impurity ventilating structure prevents the glass fiber cotton or other impurities from blocking the air inlet and enables nitrogen to pass through, the structure form can be diversified, glass fiber cloth and cloth-based adhesive tape are used as the anti-impurity ventilating structure, and the anti-impurity ventilating structure is tied on the annular blowing pipeline and fixed by low-temperature glue when in use.
Compared with the prior art, this nitrogen purging system of bimetal full-capacity jar has following advantage: the structure of the purging system is more reasonable, the coverage of purging nitrogen is wider, and the purging effect of a local area is obviously improved; the blowing effect on the local area is better, and the heat insulation performance of the heat insulation material is ensured, so that the possibility of local heat transfer or local icing is avoided, the potential safety hazard of the full-capacity tank is reduced, and the overall performance of the full-capacity tank is improved.
Drawings
Fig. 1 is a sectional view of a full-capacity can provided by the present invention.
Fig. 2 is a schematic structural diagram of a bottom thermal insulation layer purging structure provided by the present invention.
Figure 3 is a cross-sectional view at the outlet tube provided by the present invention.
Fig. 4 is a cross-sectional view of the bottom insulation layer located within the upper bottom insulation layer where the gas outlet pipe is purged.
Fig. 5 is a cross-sectional view of the bottom insulation layer located within the lower bottom insulation layer where the gas outlet pipe is purged.
FIG. 6 is a schematic diagram of the main vessel purge inlet line configuration provided by the present invention.
FIG. 7 is a schematic illustration of the installation of the main vessel purge line provided by the present invention.
FIG. 8 is a partial schematic view of an annular purge conduit provided by the present invention.
FIG. 9 is a schematic diagram of the configuration of the annular purge conduit provided by the present invention.
In the figure, a1, inner cylinder; a2, suspended ceiling; a3, inner bottom plate; a4, a pull rod; a5, inner cylinder wall bracket; b1, outer cylinder; b2, outer bottom plate; b3, ribbed arched canopy; b4, a first outer cylinder wall bracket; b5, a second outer cylinder wall bracket; c1, a middle cylinder body; c2, a middle bottom plate; c3 and a closing plate; d. an interlayer; e1, an upper bottom heat insulating layer; e2, lower bottom heat insulating layer; 11. the main container purges the gas inlet pipeline; 12. the main container purges the air outlet pipeline; 13. a main vessel purge conduit; 131. a transverse conduit; 132. a longitudinal conduit; 14. a second air outlet; 21. the bottom heat insulation layer sweeps the air inlet pipeline; 22. the bottom heat insulation layer sweeps the pipeline; 23. the bottom heat insulating layer sweeps the air outlet pipeline; 24. an outlet pipe; 3. a miscellaneous-proof breathable structure; 41. an annular purge conduit; 42. the interlayer sweeps the air outlet pipeline.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
The bimetallic full-capacity tank shown in fig. 1 comprises a main container, a secondary container and a thermal angle protection layer. The main container is used for containing a low-temperature medium, the secondary container is mainly used for containing evaporation gas and cold insulation material pearlife under the normal working condition of the main container, and is used for containing low-temperature liquid and evaporation gas under the leakage working condition of the main container, and the air tightness of the structure is ensured.
The main container includes an inner cylinder a1, a suspended ceiling a2, and an inner bottom plate a 3. The inner cylinder a1 and the inner bottom plate a3 are made of austenitic stainless steel or 9% nickel steel materials capable of bearing low-temperature media, and the suspended ceiling a2 is made of austenitic stainless steel or aluminum alloy materials. Structurally, the bottom plate adopts a combined pressure bearing structure of an annular edge plate and a middle breadth plate, the inner cylinder body a1 adopts a design with different thicknesses, reinforcing ribs are arranged to ensure the stability of the structure, and the suspended ceiling a2 is suspended on a radial beam of the ribbed arched top cover b3 through a plurality of pull rods a4 and is used for heat preservation and support of the top.
The secondary container comprises an outer cylinder b1, an outer bottom plate b2 and a ribbed arched top cover b3, wherein an inner cylinder a1 is coaxially arranged in the outer cylinder b1, the outer cylinder b1 and the outer bottom plate b2 are made of austenitic stainless steel or 9% nickel steel, the ribbed arched top cover b3 is made of materials selected according to actual conditions, low alloy steel or carbon steel is allowed to be selected in principle, in order to guarantee the safety performance of the storage tank under accident conditions to the maximum extent, austenitic stainless steel or 9% nickel steel is selected more, and a leakage collecting device is arranged at the top to avoid low-temperature damage to the ribbed arched top cover b3 and secondary disasters brought to the periphery when a process pipeline at the top leaks.
When the thermal angle protection layer is not arranged, cold energy (low-temperature liquid) is transmitted to the large-angle welding seam position of the outer cylinder b1 and the outer bottom plate b2 through the inner wall of the outer cylinder b1 and the outer wall of the inner cylinder a1, so that the large-angle welding seam bears huge temperature difference stress, the structure is failed, and safety accidents are caused. Therefore, the thermal angle protective layer is provided in the present embodiment.
The thermal angle protection layer comprises a middle cylinder c1, a middle bottom plate c2 and a sealing plate c3 in an annular shape, and forms a closed space with an outer cylinder b1 and an outer bottom plate b2 and is filled with foam glass bricks. The material of the thermal angle protective layer is S30408 stainless steel, and the main function of the thermal angle protective layer is to prevent the leaked low-temperature liquid from directly contacting with the outer cylinder and the outer bottom plate b2 of the secondary container when the primary container leaks. Structurally, the hot angle protecting bottom plate is of a pressure bearing structure formed by combining an annular edge plate and a middle web plate, the annular edge plate is in butt welding with a gasket plate, and the middle web plate is in lap welding.
The interlayer d is formed by filling the cold insulation material pearlite sand between the outer cylinder b1 and the inner cylinder a1, the foam glass brick is filled between the inner bottom plate a3 and the middle bottom plate c2 to form an upper bottom heat insulation layer e1, and the foam glass brick is filled in a closed space formed by the thermal angle protection layer, the outer cylinder b1 and the outer bottom plate b2 to form a lower bottom heat insulation layer e 2.
The nitrogen purging system of the bimetal full-capacity tank comprises a main container purging structure, an interlayer d purging structure and a bottom heat-insulating layer purging structure. The bottom heat-insulating layer purging structures are divided into two groups, namely an upper bottom heat-insulating layer e1 and a lower bottom heat-insulating layer e2, and the two groups of bottom heat-insulating layer purging structures are identical in structure.
As shown in fig. 1, the main container purging structure includes a main container purging air inlet pipeline 11, a main container purging pipeline 13 and a main container purging air outlet pipeline 12, the main container purging air inlet pipeline 11 extends into the main container from the upper side of the ribbed arched top cover b3, the outside of the main container purging air inlet pipeline is connected with a dry nitrogen source, the main container purging air inlet pipeline 11 reaches the bottom of the main container along an inner cylinder tank wall support a5 on the inner wall of an inner cylinder a1, and is communicated with the main container purging pipeline 13 through an elbow, the main container purging pipeline 13 is located on a support on an inner bottom plate a3, and the support is structured as shown in fig. 7.
As shown in fig. 6 (the direction of the arrow in fig. 6 is the nitrogen flow direction), the main tank purge line 13 includes a horizontal line 131 extending horizontally and two longitudinal lines 132 extending horizontally, the air outlet end of the main tank purge inlet line 11 communicates with the middle of the horizontal line 131, one end of the horizontal line 131 communicates with the middle of one longitudinal line 132, the other end communicates with the middle of the other longitudinal line 132, and the two longitudinal lines 132 are symmetrically arranged along the center line of the main tank. Wherein, two ends of the longitudinal pipeline 132 are sealed, and the lower side of the main container purging pipeline 13 is provided with a plurality of second air outlet holes 14, so that nitrogen is blown out from the second air outlet holes 14 at the lower part of the main container purging pipeline 13, and the purpose of uniformly purging the main container is achieved.
In some other embodiments, the main vessel purging pipeline 13 may be replaced by another main vessel purging pipeline 13, for example, the main vessel purging pipeline 13 is circular, the circular main vessel purging pipeline 13 is concentric with the main vessel, and the second outlet holes 14 are uniformly distributed in a ring shape. The H-shaped or annular purging structure is changed from linear purging, the number of the second air outlet holes 14 is increased, the purging coverage area is enlarged, the purging efficiency is improved, and the purging effect is improved.
As shown in fig. 9 (the direction of the arrow in fig. 9 is a nitrogen flow direction), the interlayer d purging structure includes an annular purging pipeline 41 located in the interlayer d and an interlayer purging air outlet pipeline 42 having an air inlet end communicated with the annular purging pipeline 41, a plurality of air inlets are opened at the bottom of the annular purging pipeline 41, and as shown in fig. 8, the impurity-proof air permeable structure 3 is also disposed at the air inlet. The anti-impurity ventilating structure 3 prevents the air inlet hole from being blocked by the pearl sand or other impurities, and allows nitrogen to pass through, the structure form can be diversified, the glass fiber cloth and the cloth base adhesive tape are used as the anti-impurity ventilating structure 3, and when the anti-impurity ventilating structure is used, the anti-impurity ventilating structure is tied on the annular purging pipeline 41 and is fixed by low-temperature glue.
Specifically, the annular purging pipeline 41 is arranged on the lower bottom heat-insulating layer e2 and is communicated with the interlayer purging gas outlet pipeline 42 through a tee joint, the interlayer purging gas outlet pipeline 42 is supported by a first outer cylinder tank wall support b4 arranged on the inner wall of the outer cylinder b1, and the upper end of the interlayer purging gas outlet pipeline 42 extends into the ribbed arched top cover b 3.
The bottom heat-insulating layer purging structure shown in fig. 2 (the arrow direction in fig. 2 is the nitrogen flow direction) includes a bottom heat-insulating layer purging inlet pipe 21, a bottom heat-insulating layer purging pipe 22 located in the bottom heat-insulating layer, and a bottom heat-insulating layer purging outlet pipe 23 having an inlet end located in the bottom heat-insulating layer, the bottom heat-insulating layer purging inlet pipe 21 is extended from the ribbed arched top cover b3, and is connected to the bottom heat-insulating layer purging inlet pipe 22 through a second outer cylinder wall support b5 provided on the inner wall of the outer cylinder b1, and the bottom heat-insulating layer purging inlet pipe 22 has a plurality of first outlet holes.
The purging air inlet pipe 11 for purging the main container is used for introducing nitrogen, the purging air inlet pipe 21 for purging the bottom heat-insulating layer is used for introducing nitrogen, the purging air inlet pipe of the main container and the purging air inlet pipe of the bottom heat-insulating layer are independently arranged, the purging air inlet pipe can be used for purging the main container and the bottom heat-insulating layer respectively, and purging efficiency is high.
As shown in fig. 2, the bottom heat-insulating layer purging pipeline 22 is provided with four outlet pipes 24 communicated with the bottom heat-insulating layer purging pipeline 22, one end of each outlet pipe 24 far away from the bottom heat-insulating layer purging pipeline 22 is plugged, the side wall of each outlet pipe 24 is provided with a first air outlet hole, as shown in fig. 3, the outlet pipe 24 is provided with an impurity-preventing and air-permeable structure 3 for covering the first air outlet hole, and the impurity-preventing and air-permeable structure 3 is made of glass cloth and cloth-based adhesive tape. Wherein, outlet pipe 24 is the nozzle stub, and its one end of keeping away from bottom heat insulation layer purge pipeline 22 stretches into bottom heat insulation layer, because first venthole is located outlet pipe 24's lateral wall, conveniently covers first venthole, will prevent during the installation miscellaneous ventilative structure 3 twine on outlet pipe 24 can, simple to operate.
As shown in fig. 2, the bottom insulation layer purge conduits 22 are connected end to form a closed loop configuration symmetrically disposed along the centerline of the main vessel, and four outlet pipes 24 are evenly distributed annularly along the centerline of the main vessel. The closed-loop structure may be a circle or other regular polygon structure, such as a square, a regular hexagon, a regular triangle, etc., and the embodiment is a circle.
As shown in fig. 4, the upper-layer bottom heat-insulating layer purge piping 22 is buried in advance in the bottom of the upper-layer bottom heat-insulating layer e1, and four outlet pipes 24 project upward into the upper-layer bottom heat-insulating layer e 1. As shown in fig. 5, the lower thermal barrier bottom purge conduit 22 is buried in advance in the bottom of the lower thermal barrier bottom layer e2, and four outlet pipes 24 project upwardly into the lower thermal barrier bottom layer e 2. When the foam glass bricks (the upper bottom heat-insulating layer e1 and the lower bottom heat-insulating layer e2) are laid, the position of the outlet pipe 24 is reserved, and glass fiber wool is filled to ensure the heat-insulating effect.
As shown in fig. 2, the number of the bottom heat insulating layer purge gas outlet pipes 23 is four, and the gas inlet ends of the bottom heat insulating layer purge gas outlet pipes 23 are uniformly distributed annularly along the center line of the main container. So that the air outlet is more uniform and the blowing quality is improved. The four outlet pipes 24 on the upper layer are arranged in a staggered manner with the four outlet pipes 24 on the lower layer, and the four bottom heat-insulating layer purging outlet pipes 23 on the upper layer are arranged in a staggered manner with the four bottom heat-insulating layer purging outlet pipes 23 on the lower layer.
In some other embodiments, the bottom insulation layer purge conduit 22 may be provided in other shapes, such as "i" shape, "Z" shape, "S" shape, etc., and the plurality of outlet pipes 24 are symmetrically distributed along the centerline of the main vessel, in order to achieve uniform gas injection.
In some other embodiments, the thermal barrier bottom purging pipe 22 has a plurality of outlet pipes 24 connected to the thermal barrier bottom purging pipe 22, the first outlet holes are disposed at an end of the outlet pipes 24 away from the thermal barrier bottom purging pipe 22, and the outlet pipes are provided with the anti-contamination and gas-permeation structures 3 for covering the first outlet holes.
The nitrogen purging system of the bimetal full-capacity tank firstly purges the main container, then purges the interlayer d, and finally purges the heat insulating layer at the bottom.
The purge process for the main vessel was as follows: the dry nitrogen enters from the main container purging inlet pipeline 11, then enters into the transverse pipeline 131 and the longitudinal pipeline 132, is uniformly discharged into the main container through the second outlet holes 14, and finally is discharged from the main container purging outlet pipeline 12 arranged on the ribbed arched top cover b 3.
The purging process of interlayer d is as follows: the valve on the main container purging outlet pipe 12 is closed, and the dry nitrogen entering the main container enters the interlayer d through the gap between the inner cylinder a1 and the suspended ceiling a2, enters the annular purging pipe 41 through the air inlet hole on the annular purging pipe 41, and is then discharged through the interlayer purging outlet pipe 42.
The bottom insulation layer was purged as follows: the nitrogen enters the bottom heat-insulating layer purging gas outlet pipeline 23 from the bottom heat-insulating layer purging gas inlet pipeline 21, then is discharged into the bottom heat-insulating layer purging gas outlet pipeline 22 from the four outlet pipes 24, and finally enters the bottom heat-insulating layer purging gas outlet pipeline 23 and is discharged from the bottom heat-insulating layer purging gas outlet pipeline 23.
The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.
Claims (9)
1. The utility model provides a nitrogen gas of bimetal full capacity jar sweeps system, sweeps structure, intermediate layer and bottom heat insulation layer and sweeps the structure including the main tank, the main tank sweeps structure and intermediate layer and sweeps structure sharing main tank and sweeps admission line (11), a serial communication port, the bottom heat insulation layer sweeps the structure and sweeps admission line (21), is located bottom heat insulation layer that bottom heat insulation layer sweeps pipeline (22) and the inlet end is located bottom heat insulation layer and sweeps pipeline (23) of giving vent to anger, the end of giving vent to anger and bottom heat insulation layer that the bottom heat insulation layer sweeps admission line (21) sweep pipeline (22) intercommunication, the bottom heat insulation layer sweeps and has a plurality of first ventholes on pipeline (22).
2. The nitrogen purging system of the bimetallic complete-volume tank as recited in claim 1, wherein the bottom heat-insulating layer purging pipeline (22) is provided with a plurality of outlet pipes (24) communicated with the bottom heat-insulating layer purging pipeline (22), one ends of the outlet pipes (24) far away from the bottom heat-insulating layer purging pipeline (22) are blocked, the side walls of the outlet pipes (24) are provided with the first air outlet holes, and the outlet pipes (24) are provided with impurity-proof and air-permeable structures (3) for covering the first air outlet holes.
3. The nitrogen purging system of a bimetallic full-tank as defined in claim 2, wherein the bottom heat insulating layer purging pipe (22) is connected end to form a closed loop structure symmetrically arranged along the center line of the main vessel, and a plurality of outlet pipes (24) are annularly and uniformly distributed along the center line of the main vessel.
4. The nitrogen purging system of the bimetallic full-tank as recited in claim 1, 2 or 3, wherein the number of the bottom heat-insulating layer purging gas outlet pipelines (23) is several, and the gas inlet ends of the bottom heat-insulating layer purging gas outlet pipelines (23) are annularly and uniformly distributed along the central line of the main container.
5. The nitrogen purging system of the bimetallic full-capacity tank as recited in claim 1, wherein the bottom heat-insulating layer purging pipeline (22) is provided with a plurality of outlet pipes (24) communicated with the bottom heat-insulating layer purging pipeline (22), the first air outlet hole is formed in one end, away from the bottom heat-insulating layer purging pipeline (22), of the outlet pipe (24), and the air outlet pipe is provided with an impurity-proof and air-permeable structure (3) for covering the first air outlet hole.
6. The nitrogen purging system of the bimetallic full-capacity tank as recited in claim 1, wherein the main container purging structure comprises a main container purging gas inlet pipeline (11) and a main container purging gas outlet pipeline (12), the gas outlet end of the main container purging gas inlet pipeline (11) is connected with a main container purging pipeline (13) located at the bottom in the main container, and a plurality of second gas outlet holes (14) are formed in the main container purging pipeline (13).
7. The nitrogen purging system of the bimetallic full-tank as recited in claim 6, wherein the main container purging pipeline (13) comprises a horizontal pipeline (131) extending horizontally and two longitudinal pipelines (132) extending horizontally, the air outlet end of the main container purging air inlet pipeline (11) is communicated with the middle part of the horizontal pipeline (131), one end of the horizontal pipeline (131) is communicated with the middle part of one longitudinal pipeline (132), the other end of the horizontal pipeline is communicated with the middle part of the other longitudinal pipeline (132), and the two longitudinal pipelines (132) are symmetrically arranged along the center line of the main container.
8. The nitrogen purging system of a bimetallic full-tank as recited in claim 7, characterized in that the longitudinal pipe (132) is blocked at both ends, and the second outlet holes (14) are evenly distributed on the lower side of the main tank purging pipe (13).
9. The nitrogen purging system of the bimetallic full-capacity tank as claimed in claim 1, wherein the interlayer purging structure comprises an annular purging pipeline (41) located in the interlayer and an interlayer purging air outlet pipeline (42) with an air inlet end communicated with the annular purging pipeline (41), a plurality of air inlets are formed in the bottom of the annular purging pipeline (41), and the air inlets are also provided with the impurity-proof ventilation structure (3).
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504114A (en) * | 2022-10-29 | 2022-12-23 | 中石化中原石油工程设计有限公司 | Sand pulling device and method for suspended ceiling normal-pressure storage tank |
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2021
- 2021-09-02 CN CN202122111870.4U patent/CN216113343U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115504114A (en) * | 2022-10-29 | 2022-12-23 | 中石化中原石油工程设计有限公司 | Sand pulling device and method for suspended ceiling normal-pressure storage tank |
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