CN217208946U - Dry gas airtight automatic switching device - Google Patents
Dry gas airtight automatic switching device Download PDFInfo
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- CN217208946U CN217208946U CN202220104319.9U CN202220104319U CN217208946U CN 217208946 U CN217208946 U CN 217208946U CN 202220104319 U CN202220104319 U CN 202220104319U CN 217208946 U CN217208946 U CN 217208946U
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- compressor
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- hydrogen
- nitrogen
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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Abstract
The utility model belongs to the technical field of the compressor, especially, airtight automatic switching control equipment of dry gas. The utility model comprises a medium-pressure nitrogen pipeline leading to the compressor and a hydrogen-nitrogen pipeline leading to the compressor and leading out from the compressor, wherein the gas outlet of the hydrogen-nitrogen pipeline is connected with the medium-pressure nitrogen pipeline; and a stop valve is arranged on the medium-pressure nitrogen pipeline, a pressure transmitter with set control pressure is installed at the air inlet end of the compressor, and the stop valve is in signal connection with the compressor and the pressure transmitter through a signal transmission module respectively. The utility model discloses a set up trip valve, pressure transmitter and signal transmission module, realized the online automatic switch-over of compressor one-level sealed middling pressure nitrogen gas and hydrogen nitrogen gas, closing and opening of remote control trip valve promptly, avoided the hydrogen nitrogen gas in the hydrogen nitrogen gas pipeline to enter into middling pressure nitrogen gas pipeline, pollute middling pressure nitrogen gas, cause synthetic ammonia system liquid nitrogen to wash the cold box middling pressure nitrogen gas pipeline stifled and the circumstances such as system parking.
Description
Technical Field
The utility model belongs to the technical field of the compressor, especially, relate to an airtight automatic switching control equipment of dry gas.
Background
Generally, a large centrifugal compressor mostly uses dry gas sealing to seal toxic or combustible explosive gas in the compressor so as to prevent the toxic or combustible explosive gas from leaking into the atmosphere. The existing centrifugal compressor for synthesizing ammonia, hydrogen and nitrogen has three stages of dry gas seal, namely, post-isolation gas, secondary seal gas and primary seal gas, wherein the post-isolation gas and the secondary seal gas use low-pressure nitrogen (with the pressure of 0.5MPa), the primary seal gas uses medium-pressure nitrogen (with the pressure of 6.0MPa) and hydrogen and nitrogen (with the pressure of 12MPa and containing trace ammonia) supplied by the interior of the compressor, and the dry gas seal is respectively used for the start and stop of the compressor and the normal operation of the compressor.
The traditional operation mode is that the upper check valve and the lower check valve are automatically switched on the medium-pressure nitrogen pipeline, but the situation of internal leakage easily occurs when the check valve is stopped in the actual production process, so that the hydrogen and nitrogen are prevented from leaking into the medium-pressure nitrogen pipeline to pollute the medium-pressure nitrogen and cause blockage of the medium-pressure nitrogen pipeline of a liquid nitrogen cold washing box of a synthetic ammonia system and system stop, an operator is often required to close a front gate valve of a check valve on site, and when the system is emergently stopped, the operator is required to open the gate valve in time, and if the gate valve is not opened in time, the dry gas seal of a compressor is easily damaged.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the utility model provides an airtight automatic switching control equipment of dry gas for this reason. The utility model discloses can avoid the hydrogen nitrogen gas in the hydrogen nitrogen gas pipeline to enter into the medium pressure nitrogen gas pipeline.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a dry gas closed automatic switching device comprises a medium-pressure nitrogen pipeline leading to a compressor and a hydrogen-nitrogen pipeline leading to the compressor and leading out of the compressor, wherein a gas outlet of the hydrogen-nitrogen pipeline is connected with the medium-pressure nitrogen pipeline; and a stop valve is arranged on the medium-pressure nitrogen pipeline, a pressure transmitter with set control pressure is installed at the air inlet end of the compressor, and the stop valve is in signal connection with the compressor and the pressure transmitter through a signal transmission module respectively.
Preferably, the signal transmission module comprises an SIS system (safety instrumented system), and the compressor is in signal connection with the shut-off valve through the SIS system.
Preferably, the signal transmission module further comprises a DCS system (distributed control system), and the pressure transmitter is in signal connection with the shut-off valve through the DCS system.
Preferably, the pressure transmitter is provided with a pressure gauge root valve.
Preferably, the control pressure of the pressure transmitter is 6.0MPa.
The utility model has the advantages that:
(1) the utility model discloses a set up trip valve, pressure transmitter and signal transmission module, realized the online automatic switch-over of compressor one-level sealed middling pressure nitrogen gas and hydrogen nitrogen gas, closing and opening of remote control trip valve promptly, avoided the hydrogen nitrogen gas in the hydrogen nitrogen gas pipeline to enter into middling pressure nitrogen gas pipeline, pollute middling pressure nitrogen gas, cause synthetic ammonia system liquid nitrogen to wash the cold box middling pressure nitrogen gas pipeline stifled and the circumstances such as system parking.
(3) The utility model discloses a signal transmission, but trip valve remote control need not operating personnel and goes the site operation again, has reduced synthetic ammonia system parking frequency, has avoided the damage of dry gas seal equipment simultaneously, has improved the safety and stability nature of system.
Drawings
Fig. 1 is a schematic flow chart of the present invention.
The notations in the figures have the following meanings:
1-medium pressure nitrogen pipeline, 2-hydrogen nitrogen pipeline, 3-compressor, 4-cut-off valve, 5-pressure transmitter and 6-pressure gauge root valve.
Detailed Description
As shown in fig. 1, the dry gas sealed automatic switching device comprises a medium-pressure nitrogen pipeline 1 leading to a compressor 3 and a hydrogen-nitrogen pipeline 2 leading to the compressor 3 and leading out from the compressor 3, wherein the gas outlet of the hydrogen-nitrogen pipeline 2 is connected with the medium-pressure nitrogen pipeline 1; the medium-pressure nitrogen pipeline 1 is provided with a stop valve 4, the air inlet end of the compressor 3 is provided with a pressure transmitter 5 with set control pressure, and the stop valve 4 is respectively in signal connection with the compressor 3 and the pressure transmitter 5 through a signal transmission module.
Specifically, the signal transmission module comprises an SIS system, and the compressor 3 is in signal connection with the cut-off valve 4 through the SIS system; the signal transmission module further comprises a DCS system, and the pressure transmitter 5 is in signal connection with the cut-off valve 4 through the DCS system. The stop signal of the compressor 3 takes precedence over the pressure signal of the pressure transmitter 5.
The pressure transmitter 5 is provided with a pressure gauge root valve 6. The control pressure of the pressure transmitter 5 is 6.0MPa, namely when the pressure transmitter 5 detects that the pressure in the compressor 3 is greater than 6.0MPa, the pressure transmitter 5 transmits a signal to the cut-off valve 4, so that the valve of the cut-off valve 4 is closed, and when the pressure in the compressor 3 is detected to be less than 6.0MPa, the SIS system controls the cut-off valve 4 to open the valve.
The operation of the device will be described in detail with reference to the drawings in the examples.
Let in middling pressure nitrogen gas in the compressor 3, prevent that the cylinder gas from leaking, the trip valve 4 that is equipped with simultaneously on the middling pressure nitrogen gas pipeline 1 can be in order to avoid a small amount of ammonia that contains in the hydrogen nitrogen gas pipeline 2 to enter into middling pressure nitrogen gas pipeline 1 and pollute middling pressure nitrogen gas pipeline 1, and the setting of trip valve 4 makes original going the scene manual valve of manual closing, changes signal transmission to the control room into, and automatic closing, and the sealed effect of trip valve 4 is better than the sealed effect of check valve.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (4)
1. The dry gas closed automatic switching device comprises a medium-pressure nitrogen pipeline (1) leading to a compressor (3) and a hydrogen-nitrogen pipeline (2) leading to the compressor (3) and led out from the compressor (3), and is characterized in that a gas outlet of the hydrogen-nitrogen pipeline (2) is connected with the medium-pressure nitrogen pipeline (1); be equipped with trip valve (4) on medium pressure nitrogen gas pipeline (1), pressure transmitter (5) that have set for control pressure are installed to the inlet end of compressor (3), trip valve (4) pass through signal transmission module respectively with compressor (3) and pressure transmitter (5) signal connection.
2. The automatic dry gas sealing switching device according to claim 1, characterized in that: the signal transmission module comprises an SIS system, and the compressor (3) is in signal connection with the cut-off valve (4) through the SIS system.
3. The automatic dry gas seal switching device according to claim 1, characterized in that: the signal transmission module further comprises a DCS system, and the pressure transmitter (5) is in signal connection with the cut-off valve (4) through the DCS system.
4. The automatic dry gas seal switching device according to claim 1, characterized in that: and a pressure gauge root valve (6) is arranged on the pressure transmitter (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220104319.9U CN217208946U (en) | 2022-01-14 | 2022-01-14 | Dry gas airtight automatic switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220104319.9U CN217208946U (en) | 2022-01-14 | 2022-01-14 | Dry gas airtight automatic switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217208946U true CN217208946U (en) | 2022-08-16 |
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ID=82792947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220104319.9U Active CN217208946U (en) | 2022-01-14 | 2022-01-14 | Dry gas airtight automatic switching device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217208946U (en) |
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2022
- 2022-01-14 CN CN202220104319.9U patent/CN217208946U/en active Active
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