A crude argon purification denitrification column

Abstract

The utility model relates to crude argon gas treatment technical field especially is a kind of crude argon gas purification liquefaction's nitrogen removal tower, including plate heat exchanger, the gas outlet end of plate heat exchanger is connected with the fifth connecting pipe, the tail end of the fifth connecting pipe is connected with nitrogen removal tower body, the top of nitrogen removal tower body is connected with the first connecting pipe, the tail end of the first connecting pipe is connected with booster casing, the bottom of booster casing is connected with impurity removal device, the inside of impurity removal device is equipped with through slot, in the utility model, through the through slot, second filter, uniform flow disc, first filter, short connecting rod and rubber ring being set, crude argon gas purification liquefaction's nitrogen removal tower can be conveniently after crude argon rectification treatment, for the low-pressure waste gas generated, before heat exchange treatment is carried out to low-pressure waste gas, utilize multistage impurity removal structure to filter and remove the impurity treatment to low-pressure waste gas, avoid the pollution caused by the low-pressure waste gas containing impurities directly sent into the inside of heat exchange equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to crude argon gas treatment technical field, concretely is a kind of crude argon gas purification liquefaction's nitrogen removal tower. BACKGROUND

[0002] When crude argon gas is purified and liquefied, considering that crude argon gas generally contains a small amount of nitrogen impurities and a large amount of oxygen impurities, a nitrogen removal tower is often used to assist in processing during the operation of the crude argon gas purification and liquefaction system. Specifically, the nitrogen removal tower is mainly used to remove most of the nitrogen impurities and part of the oxygen impurities through rectification to obtain low-pressure liquid oxygen, argon-rich oxygen and low-pressure waste gas.

[0003] In the prior art, when the nitrogen removal tower is used to rectify the crude argon gas, the low-pressure waste gas obtained after rectification is sent back into the heat exchange equipment for heat exchange. However, considering that the packing layer inside the nitrogen removal tower is severely contaminated, the low-pressure waste gas may still contain incompletely reacted chemicals, fine particles or other impurities. When these impurities are directly sent into the heat exchange equipment with the low-pressure waste gas, they may easily contaminate the inside of the heat exchange equipment and increase the risk of blockage failure inside the heat exchange equipment. Therefore, a crude argon gas purification and liquefaction nitrogen removal tower is proposed to solve the above problems. SUMMARY

[0004] The utility model aims to provide a kind of crude argon gas purification liquefaction's nitrogen removal tower, to solve the problem that the impurities contained in low-pressure waste gas exist to easily contaminate the inside of heat exchange equipment when nitrogen removal tower is used to rectify crude argon gas and low-pressure waste gas is generated in the above background art.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A crude argon gas purification and liquefaction nitrogen removal tower includes a plate heat exchanger, a fifth connecting pipe is connected to the gas outlet end of the plate heat exchanger, a nitrogen removal tower body is connected to the end of the fifth connecting pipe, a first connecting pipe is connected to the top of the nitrogen removal tower body, a booster sleeve is connected to the end of the first connecting pipe, a impurity removal device is connected to the bottom of the booster sleeve, a through slot is formed in the inside of the impurity removal device, a first filter is threadedly connected to the position close to the longitudinal end outlet inside the through slot, a short connecting rod is fixedly connected to one end of the first filter, a uniform flow disc is fixedly connected to the top end of the short connecting rod, a rubber ring is sleeved outside the uniform flow disc, and a discharge port is connected to the bottom left side of the impurity removal device.

[0007] Preferably, a second connecting pipe is connected to the bottom of the nitrogen removal tower body, a third connecting pipe is connected to the right side of the nitrogen removal tower body, and an oxygen removal tower body is connected to the side away from the nitrogen removal tower body of the third connecting pipe.

[0008] Preferably, the impurity removal device and the plate heat exchanger are connected to each other through a fourth connecting pipe, and an inlet of the fourth connecting pipe is connected to a transverse end outlet of the impurity removal device.

[0009] Preferably, the booster sleeve comprises a booster inner pipe and an extended flared portion, the booster inner pipe has a shape of a venturi structure, and the lower part of the extended flared portion is clamped to the inside of the longitudinal end outlet of the through groove.

[0010] Preferably, a second filter is screw-connected to the inside of the through groove close to the transverse end outlet, the second filter is arranged opposite to the discharge port, the flow uniformizing disc and the first filter are arranged in parallel, and the surface of the flow uniformizing disc is provided with a plurality of round holes.

[0011] Compared with the prior art, the present application has the following beneficial effects:

[0012] In the present application, the through groove, the second filter, the flow uniformizing disc, the first filter, the short connecting rod and the rubber ring are arranged, so that after the crude argon purification liquefaction denitrogenation tower is used for rectifying treatment of crude argon, the low-pressure waste gas generated can be filtered and impurity-removed by the multistage impurity removal structure composed of the through groove, the second filter, the flow uniformizing disc, the first filter, the short connecting rod and the rubber ring before heat exchange treatment of the low-pressure waste gas, so that pollution caused by directly sending the low-pressure waste gas containing impurities into the inside of the heat exchange equipment is avoided, the impurity removal treatment is effectively performed, the risk of blockage failure of the inside of the heat exchange equipment is reduced, and the working efficiency of subsequent use of the heat exchange equipment is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a whole structure schematic view of the present application;

[0014] Figure 2 It is an internal structure schematic view of the impurity removal device of the present application;

[0015] Figure 3 It is an internal structure schematic view of the booster sleeve of the present application;

[0016] Figure 4 It is a structure schematic view of the flow uniformizing disc of the present application.

[0017] In the drawings: 1, plate heat exchanger; 2, denitrogenation tower body; 3, first connecting pipe; 4, booster sleeve; 41, booster inner pipe; 42, extended flared portion; 5, impurity removal device; 51, through groove; 52, second filter; 53, first filter; 54, short connecting rod; 55, flow uniformizing disc; 56, rubber ring; 57, discharge port; 6, second connecting pipe; 7, third connecting pipe; 8, deoxygenation tower body; 9, fourth connecting pipe; 10, fifth connecting pipe. DETAILED DESCRIPTION

[0018] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0019] Please refer to Figures 1-4 , the present application provides a technical scheme:

[0020] A kind of crude argon purification liquefied denitrification tower, including plate heat exchanger 1, the gas outlet of plate heat exchanger 1 is connected with fifth connecting pipe 10, the tail end of fifth connecting pipe 10 is connected with denitrification tower body 2, the top of denitrification tower body 2 is connected with first connecting pipe 3, the tail end of first connecting pipe 3 is connected with booster sleeve 4, the bottom of booster sleeve 4 is connected with impurity removal device 5, the inside of impurity removal device 5 is provided with through slot 51, first filter 53 is threadedly connected in the position close to longitudinal end outlet in through slot 51, one end of first filter 53 is fixedly connected with short connecting rod 54, the top of short connecting rod 54 is fixedly connected with uniform flow disc 55, rubber ring 56 is sleeved on the outside of uniform flow disc 55, the bottom left side of impurity removal device 5 is connected with discharge port 57.

[0021] As Figure 1 shown, the bottom of denitrification tower body 2 is connected with second connecting pipe 6, the right side of denitrification tower body 2 is connected with third connecting pipe 7, the side away from denitrification tower body 2 of third connecting pipe 7 is connected with oxygen removal tower body 8, second connecting pipe 6 can be connected with liquid oxygen storage tank when in use, so that the liquid oxygen generated in the lower part of denitrification tower body 2 flows into the inside of liquid oxygen storage tank; impurity removal device 5 and plate heat exchanger 1 are connected with each other through fourth connecting pipe 9, the inlet of fourth connecting pipe 9 is connected with the horizontal end outlet of impurity removal device 5, under the arrangement of being connected with each other, the low-pressure waste gas after impurity removal is sent into the inside of plate heat exchanger 1 through fourth connecting pipe 9 for reheat.

[0022] As Figure 1 , Figure 2 and Figure 3 shown, booster sleeve 4 includes booster inner tube 41 and extension flared mouth 42, the shape of booster inner tube 41 is venturi structure, the lower part of extension flared mouth 42 is clamped in the inside of longitudinal end outlet of through slot 51, after the low-pressure waste gas without impurity is taken out from the inside of denitrification tower body 2, it will be pre-entered into the inside of booster sleeve 4 through first connecting pipe 3, the booster inner tube 41 provided in the inside of booster sleeve 4 will assist the low-pressure waste gas in pressurization.

[0023] As Figure 1 , Figure 2 and Figure 4As shown, the through slot 51 is internally threaded with a second filter 52 near the transverse end outlet, the second filter 52 is arranged opposite to the discharge port 57, the flow uniformizing disc 55 and the first filter 53 are arranged in parallel, the surface of the flow uniformizing disc 55 is provided with a plurality of round holes, under the arrangement of the plurality of reserved round holes, the flow uniformizing disc 55 can perform flow uniformizing treatment on the low-pressure waste gas before impurity removal treatment, and the use area of the flow uniformizing disc 55 or the second filter 52 is increased.

[0024] Work flow: in the process of starting the whole crude argon purification liquefaction system, when the denitrogenation tower body 2 is needed to be used, first, the raw material crude argon will enter the inside of the plate heat exchanger 1 and exchange heat with the backflow cold fluid, after being cooled and saturated, it can be sent into the inside of the denitrogenation tower body 2 through the inside of the fifth connecting pipe 10, and then low-pressure liquid oxygen, argon-rich oxygen and low-pressure waste gas are obtained, then the argon-rich oxygen is sent into the inside of the deoxygenation tower body 8 through the third connecting pipe 7 for deoxygenation treatment, the low-pressure liquid oxygen is sent into the liquid oxygen storage tank through the second connecting pipe 6, and the low-pressure waste gas is sent into the inside of the pressurizing sleeve 4 through the first connecting pipe 3, after the low-pressure waste gas is pressurized by passing through the inside of the pressurizing inner tube 41, it is sent into the inside of the through slot 51 through the extended flared portion 42, at this time, under the arrangement of the threaded connection, the flow uniformizing disc 55 connected with the first filter 53 will first uniformly flow the low-pressure waste gas, so that the first filter 53 filters and removes impurities from the low-pressure waste gas uniformly diffused, then the flow uniformizing disc 55 connected with the second filter 52 will uniformly flow the low-pressure waste gas again, so that the second filter 52 filters and removes impurities from the low-pressure waste gas uniformly diffused again, and finally the clean waste gas after multi-stage impurity removal treatment is sent back into the inside of the plate heat exchanger 1 through the inside of the fourth connecting pipe 9 for heat exchange, and the rectification and denitrogenation work is completed by the whole crude argon purification liquefaction system.

[0025] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and modifications can be made to these embodiments without departing from the principles and spirits of the present application, the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A nitrogen removal tower for crude argon purification and liquefaction, comprising a plate heat exchanger (1), characterized in that: The plate heat exchanger (1) is connected to a fifth pipe (10) at its outlet end. The end of the fifth pipe (10) is connected to a denitrification tower body (2). The top of the denitrification tower body (2) is connected to a first pipe (3). The end of the first pipe (3) is connected to a pressurizing sleeve (4). The bottom of the pressurizing sleeve (4) is connected to a cleaning device (5). The cleaning device (5) has a through groove (51) inside. The through groove (51) is threaded with a first filter (53) near the longitudinal outlet. One end of the first filter (53) is fixedly connected to a short connecting rod (54). The top end of the short connecting rod (54) is fixedly connected to a flow equalizing plate (55). The outside of the flow equalizing plate (55) is fitted with a rubber ring (56). The bottom left side of the cleaning device (5) is connected to a discharge port (57).

2. The nitrogen removal tower for crude argon purification and liquefaction according to claim 1, characterized in that: The bottom of the nitrogen removal tower body (2) is connected to a second pipe (6), the right side of the nitrogen removal tower body (2) is connected to a third pipe (7), and the side of the third pipe (7) away from the nitrogen removal tower body (2) is connected to a deoxygenation tower body (8).

3. The nitrogen removal tower for crude argon purification and liquefaction according to claim 1, characterized in that: The impurity removal device (5) and the plate heat exchanger (1) are connected to each other through a fourth connecting pipe (9), and the inlet of the fourth connecting pipe (9) is connected to the lateral outlet of the impurity removal device (5).

4. The nitrogen removal tower for crude argon purification and liquefaction according to claim 1, characterized in that: The pressurizing sleeve (4) includes a pressurizing inner tube (41) and an extension flare (42). The pressurizing inner tube (41) has a Venturi tube structure, and the lower part of the extension flare (42) is fitted inside the longitudinal end outlet of the through groove (51).

5. The nitrogen removal tower for crude argon purification and liquefaction according to claim 1, characterized in that: The second filter (52) is threadedly connected inside the through groove (51) near the horizontal end outlet. The second filter (52) is set directly opposite the discharge port (57). The flow equalization plate (55) and the first filter (53) are arranged vertically parallel to each other. The surface of the flow equalization plate (55) is provided with several round holes.

Images