CN217275713U - Sealed gas heating device and low-temperature sealed exhaust vaporization heating system - Google Patents

Abstract

The utility model relates to an air separation plant cryogenic liquids pump correlation equipment field discloses a sealed gas heating device and sealed emission vaporization heating system of low temperature, sealed gas heating device is including steam channel (3) that have steam inlet (1) and steam outlet (2) to and sealed gas heating channel (6) that have sealed gas inlet (4) and sealed gas outlet (5), sealed gas outlet (5) are connected with cryogenic pump (7), steam channel (3) with sealed gas heating channel (6) set up to heat transfer each other, with to the heating by sealed gas outlet (5) carry extremely the sealed gas of cryogenic pump (7). The utility model provides a because this form seals up to be in low temperature environment in the gasification of cryogenic liquids for a long time, the pump very easily takes gas to produce vibrations in service, causes the sound ring friction easily, leads to seal structure very easily to damage to seriously influence the technical problem of device safety, stability and permanent operation.

Description

Sealed gas heating device and low-temperature sealed discharge vaporization heating system

Technical Field

The utility model relates to an air separation plant cryogenic liquids pump correlation equipment field specifically relates to a sealed gas heating device and sealed vaporization heating system that discharges of low temperature.

Background

The cryogenic liquid pump is a key device for conveying liquid products in the air separation plant. The large-scale air separation plant cryopump adopts novel dry gas seal form, and this dry gas seal is the combination of dry gas seal and mechanical seal, and the rotating ring starts the indent on mechanical seal's basis, does not have outer supply seal gas, only sets up the concentration of sweeping gas in order to prevent that humid air from getting into and reduce the low temperature medium after leaking in the sound ring outside, and seal gas forms after for the gasification of cryogenic liquids. Because large-scale empty cryogenic liquids pump design entry pressure is low, when many cryogenic liquids pump of operation simultaneously, the sealed air film rigidity of dry gas is poor, and cryogenic liquids super-cooled rate is low, and the pump is very easily taken gas in service and is produced vibrations, causes the friction of sound ring easily, leads to seal structure very easily to damage to seriously influence device safety, stability and permanent operation. Particularly in winter, the temperature of nitrogen purge gas arranged outside the dry gas seal is reduced along with the reduction of the environmental temperature, and the leaked low-temperature medium cannot be purged after being vaporized in time, so that the local icing of the pump is caused, the stability of a sealing gas film of the low-temperature pump is influenced, and the dry gas seal is damaged.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming that prior art exists because this form seals to be in low temperature environment in the gasification of cryogenic liquids for a long time, and the pump very easily takes gas to produce vibrations in service, causes sound ring friction easily, leads to seal structure very easily to damage to seriously influence the technical problem of device safety, stability and permanent operation.

In order to achieve the above object, an aspect of the present invention provides a seal gas heating apparatus.

The seal gas heating device comprises a steam channel with a steam inlet and a steam outlet, and a seal gas heating channel with a seal gas inlet and a seal gas outlet, wherein the seal gas outlet is connected with the cryogenic pump, and the steam channel and the seal gas heating channel are arranged to exchange heat with each other so as to heat seal gas conveyed to the cryogenic pump from the seal gas outlet.

The utility model provides a sealed gas heating device, sealed heating device is through setting up the sealed heating passageway of being connected with the cryopump, and carry out the steam passage of heat transfer with this sealed heating passageway, carry to the sealed gas of cryopump with the sealed gas export of sealed heating passageway and heat, thereby solved because this form seals up and is in low temperature environment in the gasification of cryogenic liquids for a long time, the pump is very easily taken gas in service and is produced vibrations, cause the sound ring friction easily, lead to seal structure to very easily damage, thereby seriously influence device safety, stable and permanent technical problem of operation.

Preferably, the seal gas heating device comprises a heat exchange box body, and the seal gas inlet and the seal gas outlet are arranged on the heat exchange box body so that the seal gas heating channel comprises at least one part of an inner cavity of the heat exchange box body; the steam channel extends through the heat exchange box body to be capable of exchanging heat with the sealing gas flowing into the inner cavity of the heat exchange box body.

Preferably, the bottom of the heat exchange box body is provided with a condensate recovery pipe.

Preferably, the steam inlet and the steam outlet are respectively positioned at the bottom and the top of the heat exchange box body, and the sealing gas inlet and the sealing gas outlet are arranged on the side wall of the heat exchange box body; and/or the steam inlet is positioned below the steam outlet.

Preferably, the seal gas heating passage is provided with a thermometer at a portion near the seal gas outlet.

Preferably, the diameter of the pipe portion of the steam channel located inside the heat exchange box body is larger than the diameter of the pipe portion of the steam channel located outside the heat exchange box body.

Preferably, the pipe part of the steam channel located in the heat exchange box body is spirally arranged.

Preferably, the heat exchange box body is provided with a pressure gauge and an air escape valve.

The utility model discloses the second aspect provides a low temperature seals discharges vaporization heating system.

The low-temperature sealed discharge vaporization heating system comprises a low-temperature pump and any one of the sealing gas heating devices, wherein the low-temperature pump is connected with the sealing gas outlet of the sealing gas heating device.

Preferably, a plurality of said seal gas heating means are included.

Drawings

Fig. 1 is a schematic structural diagram of a seal gas heating apparatus provided by the present invention.

Description of the reference numerals

0. A seal gas heating device; 1. a steam inlet; 2. a steam outlet; 3. a steam channel; 4. sealing the gas inlet; 5. sealing the gas outlet; 6. sealing the gas heating channel; 7. a cryopump; 8. a heat exchange box body; 9. a condensate recovery pipe; 10. and (4) a thermometer.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "including" and "having," and any variations thereof, in the description and claims of the present invention and the above-described drawings are intended to cover non-exclusive inclusions, where the terms "upper," "lower," "top," "bottom," "inner," "outer," "center," "vertical," and the like are used in an orientation or positional relationship based on the orientation or positional relationship as shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1, the utility model provides a sealed gas heating device, this sealed gas heating device is including steam channel 3 that has steam inlet 1 and steam outlet 2 to and have sealed gas heating channel 6 of sealed gas inlet 4 and sealed gas outlet 5, sealed gas outlet 5 is connected with cryogenic pump 7, and steam channel 3 sets up to exchanging heat each other with sealed gas heating channel 6, in order to carry the sealed gas to cryogenic pump 7 by sealed gas outlet 5 to the heating.

The utility model provides a sealed gas heating device, sealed heating device is through setting up the sealed heating passageway of being connected with the cryopump, and carry out the steam passage of heat transfer with this sealed heating passageway, carry the sealed gas to the cryopump to sealed gas outlet of heating passageway and heat, thereby solved because this form seals up and is in the low temperature environment for a long time in the gasification process of cryogenic liquids, the pump very easily takes gas to produce vibrations in service, cause sound ring friction easily, lead to seal structure very easily to damage, thereby seriously influence the device safety, stable and permanent technical problem of operation.

In the optional embodiment of the present invention, the sealing gas heating device includes a heat exchange box 8, and the sealing gas inlet 4 and the sealing gas outlet 5 are disposed on the heat exchange box 8, so that the sealing gas heating channel 6 includes at least a part of the inner cavity of the heat exchange box 8, and the steam channel 3 extends through the heat exchange box 8 to exchange heat with the sealing gas flowing into the inner cavity of the heat exchange box 8. The setting of heat transfer box 8 can be effectual fixes the relative position of sealed gas heating channel 6 and steam channel 3, is favorable to carrying out the heat transfer to sealed gas. The utility model discloses in further optional embodiment, 8 bottoms of heat transfer box are equipped with lime set recovery tube 9 to the water that forms because of the steam condensation in the heat exchange causes the air in the heat transfer box 8 assembles discharge heat transfer box 8.

The utility model discloses in the optional embodiment, steam inlet 1 and steam outlet 2 are located heat transfer box 8 bottom and top respectively, and sealed gas inlet 4 and sealed gas outlet 5 locate on heat transfer box 8's lateral wall, and steam passageway 3 sets up with sealed gas heating channel 6 is perpendicular promptly. In a further alternative embodiment, the steam inlet 1 is located below the steam outlet 2 to take advantage of the upward movement of hot air (water vapor) to facilitate heat exchange of the seal gas in the seal gas heating channel 6 by the steam channel 3.

The utility model discloses in the optional embodiment, sealed gas heating channel 6 is equipped with thermometer 10 in the part that is close to sealed gas export 5, can learn to enter into the temperature of sealed gas in cryogenic pump 7 according to the temperature display of thermometer 10, simultaneously, can adjust the steam temperature in steam channel 3 according to the temperature of thermometer 10 to ensure to enter into the sealed gas in cryogenic pump 7 and reach predetermined temperature value after the heat transfer, and then guarantee that cryogenic pump 7 does not receive the influence of low temperature environment.

The utility model discloses in the optional embodiment, the diameter that is located the inside pipeline part of heat transfer box 8 of steam channel 3 is greater than the diameter that this steam channel 3 is located the outside pipeline part of heat transfer box 8 to improve steam channel 3's radiating efficiency, promote the heat transfer rate of seal gas in the seal gas heating channel 6. In a further optional embodiment of the present invention, in order to increase the heat dissipation surface area of the steam channel 3 in the heat exchange box 8, the pipe portion of the steam channel 3 located in the heat exchange box 8 is spirally disposed.

The utility model discloses in the optional embodiment, for the security and the stability that improve sealed gas heating device overall structure, be equipped with manometer and disappointing valve on the heat transfer box 8 to atmospheric pressure to in the heat transfer box 8 carries out real-time control and regulation, avoids because of atmospheric pressure is too big or undersize, places the heat transfer effect of steam channel 3 and sealed gas heating channel 6 in the heat transfer box 8 in the influence.

The utility model provides a low temperature seal discharges gasification heating system, this low temperature seal discharges gasification heating system include cryopump 7 and any one of the aforesaid sealed gas heating device 0, cryopump 7 is connected with sealed gas outlet 5 of sealed gas heating device 0.

In an alternative embodiment of the present invention, the low temperature sealed discharge gasification heating system includes a plurality of seal gas heating devices corresponding to 1 or more cryopumps 7.

It should be noted that the device that the air compressor unit that exists in the existing market wholly carries out temperature heating because the heating range is wide, can't carry out the assurance of operating temperature to the cryopump structure, consequently, is in with the sample the utility model provides a technical problem.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. Seal gas heating device, characterized in that it comprises a steam channel (3) with a steam inlet (1) and a steam outlet (2), and a seal gas heating channel (6) with a seal gas inlet (4) and a seal gas outlet (5), the seal gas outlet (5) being connected to a cryogenic pump (7), the steam channel (3) and the seal gas heating channel (6) being arranged to be able to exchange heat with each other for heating the seal gas delivered by the seal gas outlet (5) to the cryogenic pump (7).

2. The seal gas heating apparatus according to claim 1, wherein the seal gas heating apparatus comprises a heat exchange box (8), and the seal gas inlet (4) and the seal gas outlet (5) are provided on the heat exchange box (8) such that the seal gas heating channel (6) comprises at least a part of an inner cavity of the heat exchange box (8); the steam channel (3) extends through the heat exchange box body (8) to be capable of exchanging heat with the sealing gas flowing into the inner cavity of the heat exchange box body (8).

3. The seal gas heating device according to claim 2, wherein a condensate recovery pipe (9) is provided at the bottom of the heat exchange tank (8).

4. The seal gas heating device according to claim 2, wherein the steam inlet (1) and the steam outlet (2) are respectively located at the bottom and the top of the heat exchange box body (8), and the seal gas inlet (4) and the seal gas outlet (5) are arranged on the side wall of the heat exchange box body (8); and/or the steam inlet (1) is located below the steam outlet (2).

5. Sealing gas heating device according to claim 1, characterized in that the sealing gas heating channel (6) is provided with a temperature gauge (10) in a portion close to the sealing gas outlet (5).

6. The seal gas heating apparatus according to claim 2, wherein a pipe portion of the steam channel (3) located inside the heat exchange case (8) has a larger diameter than a pipe portion of the steam channel (3) located outside the heat exchange case (8).

7. The seal gas heating device according to any one of claims 2 to 4, 6, wherein the pipe portion of the steam channel (3) in the heat exchange box (8) is helically arranged.

8. The seal gas heating apparatus according to claim 7, wherein a pressure gauge and a gas release valve are provided on the heat exchange tank body (8).

9. Cryogenic seal discharge vaporization heating system, comprising a cryogenic pump (7) and a seal gas heating device (0) according to any one of claims 1 to 8, the cryogenic pump (7) being connected to the seal gas outlet (5) of the seal gas heating device (0).

10. A cryogenic seal discharge vaporization heating system according to claim 9, comprising a plurality of the seal gas heating devices (0).

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