CN110360453B - Air pipe network system and control method - Google Patents
Air pipe network system and control method Download PDFInfo
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- CN110360453B CN110360453B CN201910513638.8A CN201910513638A CN110360453B CN 110360453 B CN110360453 B CN 110360453B CN 201910513638 A CN201910513638 A CN 201910513638A CN 110360453 B CN110360453 B CN 110360453B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
- F17D1/04—Pipe-line systems for gases or vapours for distribution of gas
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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Abstract
The invention discloses an air pipe network system and a control method, wherein the air pipe network system comprises: the power gas pipe network is provided with a power user branch for accessing a power gas user; the instrument gas pipe network is provided with an instrument user branch for accessing an instrument gas user; the system comprises a plurality of air compression stations, a power gas pipe network, an instrument gas pipe network and a control valve, wherein any air compression station is respectively connected to the power gas pipe network and the instrument gas pipe network through the outlet control valve and is provided with a plurality of air compressor units; and the buffer gas container is stored with nitrogen and is connected to the instrument gas pipe network through the nitrogen control valve, and when the pressure value of the instrument gas pipe network is lower than the critical value, the nitrogen control valve is switched on to enable the nitrogen of the buffer gas container to flow into the instrument gas pipe network. The air pipe network system and the control method can quickly respond in case of an accident or a fault, ensure the normal supply of gas to ensure that various industrial equipment can normally operate or can be safely closed under the buffer, have the advantages of quick response and stable transition, and are not influenced by the fluctuation of the accident or the fault.
Description
Technical Field
The invention relates to the technical field of air official nets, in particular to an air pipe network system and a control method.
Background
Instrument gases and motive gases are the main types of industrial gases and are one of the main power sources for industrial equipment. The former belongs to clean compressed air which is dehydrated and provides a driving air source for a pneumatic executive element; the latter belongs to common compressed air which is simply purified, and meets the general air use requirement of a factory. As a typical representative of heavy industry, the metallurgical industry needs to use a large amount of instrument gas and power gas, and a gas supply device in an air pipe network provides a driving gas source for various industrial devices.
Along with the rapid expansion of the scale of a metallurgical plant, the installed capacity of air supply equipment in an air pipe network is rapidly increased, and the air pipe network has the development trend of large-scale and intellectualization, so that the accident or fault occurrence rate is multiplied. The existing air pipe network can not respond quickly in case of sudden accidents or faults, so that the gas can not be supplied normally, the normal operation of various industrial equipment and the normal operation of industrial production are seriously influenced, and even the safety accidents of casualties are caused.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides an air pipe network system and a control method, which can quickly respond when an accident or a fault occurs, ensure the normal supply of gas and are not influenced by the fluctuation of the accident or the fault.
The invention provides an air hose net system, which comprises:
the power gas pipe network is provided with a power user branch for accessing a power gas user;
the instrument gas pipe network is provided with an instrument user branch for accessing an instrument gas user;
the system comprises a power gas pipe network, an instrument gas pipe network, a plurality of air compression stations, a plurality of air compression units and a control system, wherein any air compression station is connected to the power gas pipe network and the instrument gas pipe network through an outbound control valve respectively and is provided with a plurality of air compression units;
and the buffer gas container is used for storing nitrogen and is connected to the instrument gas pipe network through a nitrogen control valve, and when the pressure value of the instrument gas pipe network is lower than a critical value, the nitrogen control valve is switched on so that the nitrogen of the buffer gas container flows into the instrument gas pipe network.
Further, the pressure value of nitrogen in the buffer gas container is 2.5-3 MPa.
Further, the buffer gas container is connected with a nitrogen source pipeline through an inflation control valve.
Furthermore, a check valve is arranged in a connecting pipeline of the buffer gas container and the instrument gas pipe network, and the input end of the check valve is connected with the buffer gas container.
Furthermore, one end of the nitrogen control valve is connected with the buffer gas container, and the other end of the nitrogen control valve is connected with the instrument gas pipe network through a manual control valve.
Further, the nitrogen control valve is a control valve that is automatically turned on and manually reset.
Furthermore, the power gas pipe network is an annular closed pipe network formed by sequentially connecting a plurality of connecting pipelines end to end, and any one of the air compression stations can deliver compressed air to any power gas user through the annular closed pipe network.
Furthermore, the instrument gas pipe network is an annular closed pipe network formed by sequentially connecting a plurality of connecting pipelines end to end, and any one of the air compression stations can deliver compressed air to any instrument gas user through the annular closed pipe network.
Further, the number of the air compression stations is at least three.
Further, the critical value is 0.48 MPa.
The air pipe network system control method provided by the invention is applied to any one of the air pipe network systems, and comprises the following steps:
determining an air compression station with an accident/fault and an air compressor unit with the accident/fault in the air compression station;
judging whether an air compressor unit which does not have accidents or faults and is kept idle exists in the air compression station with the accidents/faults, if so, starting the air compressor unit, otherwise, judging whether air compressor units which do not have accidents or faults and are kept idle exist in other air compression stations, if so, starting the air compressor unit, otherwise, giving an alarm and conducting the nitrogen control valve to enable nitrogen of the buffer gas container to flow into the instrument gas pipe network;
at any moment, when the pressure value of the instrument gas pipe network is lower than a critical value, the nitrogen control valve is conducted to enable the nitrogen of the buffer gas container to flow into the instrument gas pipe network; and when the pressure value of the instrument gas pipe network is not lower than the critical value, the nitrogen control valve is closed.
Further, the nitrogen control valve is automatically turned on and manually reset.
One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:
when an accident or a fault occurs to an air compressor unit in an air compression station, idle air compressor units in the same air compression station or other air compression stations can quickly replace the fault air compressor unit to supply air in sequence, and a buffer gas container provides temporary gas supply in a transition stage to ensure stable transition, so that the air pipe network, particularly the instrument gas pipe network, cannot generate gas supply fluctuation and air pressure fluctuation, normal operation of various industrial equipment in a factory is ensured or the industrial equipment is safely closed under buffering.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of an air piping system provided in example 1 of the present invention.
Description of the main element symbols:
1-a first air pressure station, 11-a first power outbound control valve, 12-a first instrument outbound control valve, 2-a second air pressure station, 21-a second power outbound control valve, 22-a second instrument outbound control valve, 3-a third air pressure station, 31-a third power outbound control valve, 32-a third instrument outbound control valve, C1-C2-C3-a power gas pipe network, 41-a first power gas pipe, 42-a second power gas pipe, 43-a third power gas pipe, D1-D2-D3-a meter gas pipe network, 51-a first instrument gas pipe, 52-a second instrument gas pipe, 53-a third instrument gas pipe, 6-a buffer gas container, 71-a nitrogen control valve, 72-a gas-filling control valve, 73-a check valve, 74-manual control valve.
Detailed Description
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Example 1
Referring to fig. 1, the present embodiment discloses a specific structure of an air piping system, which includes a power gas piping network C1-C2-C3, an instrument gas piping network D1-D2-D3, a plurality of air compression stations and at least one buffer gas container 6, and can rapidly respond to an accident or a fault, so as to ensure the normal supply of gas, and is not affected by the fluctuation of the accident or the fault.
Wherein the powered gas ductwork C1-C2-C3 has powered user branches for accessing powered gas users (A1, A2, A3, A4, A5, A6 as shown in FIG. 1). The power gas (also called factory air) is supplied to the power gas pipe network C1-C2-C3, and the requirement of common application with low gas quality requirement is met.
Wherein the instrument gas piping network D1-D2-D3 has instrument user branches for accessing instrument gas users (e.g., B1, B2, B3, B4, B5, B6, B7 shown in fig. 1). The instrument gas (also called instrument air) is supplied in the instrument gas pipe networks D1-D2-D3, and the cleanliness and the dryness are both high, so that the requirements of a driving gas source of a pneumatic actuator (such as an actuator of a pneumatic valve, a cylinder and the like) are met. It can be understood that the instrument gas pipe networks D1-D2-D3 are provided with corresponding gas source processing elements (such as a dry filter, an oil mist separator, etc.) to make the compressed air output from the air compression station meet the quality requirements of the instrument gas.
Any one of the plurality of air compression stations is respectively connected to the power gas pipe network C1-C2-C3 and the instrument gas pipe network D1-D2-D3 through the outbound control valve. In other words, the same air compression station can provide power gas for the power gas pipe network C1-C2-C3 and can also provide instrument gas for the instrument gas pipe network D1-D2-D3. Any air compressor station is provided with a plurality of air compressor units, the air compressor units work independently and do not influence each other, and any air compressor unit can be connected into a power gas pipe network C1-C2-C3 or an instrument gas pipe network D1-D2-D3 independently.
When an air compressor unit in any air compression station has an accident or a fault, the air compressor unit which does not have the accident or the fault and is kept idle can be searched in the same air compression station and other air compression stations according to the sequence, and the idle air compressor unit or the idle air compressor units are used as standby units to quickly take over the air supply of the air compressor unit which has the accident or the fault, so that the quick response is realized. When the standby unit is determined, the same air compression station is preferentially considered; when no standby units exist in the same air compression station or the number of the standby units is insufficient, other air compression stations are considered, the response speed is increased according to the selection sequence, and the stable handover is ensured.
Exemplarily, the number of the air compression stations is at least three. For example, a first pneumatic station 1 is connected to a power gas pipe network C1-C2-C3 through a first power outbound control valve 11, and is connected to an instrument gas pipe network D1-D2-D3 through a first instrument outbound control valve 12; the second air compression station 2 is connected into a power gas pipe network C1-C2-C3 through a second power outbound control valve 21, and is connected into an instrument gas pipe network D1-D2-D3 through a second instrument outbound control valve 22; the third air compression station 3 is connected to a power gas pipe network C1-C2-C3 through a third power outbound control valve 31, and is connected to an instrument gas pipe network D1-D2-D3 through a third instrument outbound control valve 32. It can be understood that the first power outbound control valve 11, the first meter outbound control valve 12, the second power outbound control valve 21, the second meter outbound control valve 22, the third power outbound control valve 31, and the third meter outbound control valve 32 have both the functions of flow control and switch off.
Exemplarily, the power gas pipe network C1-C2-C3 is a circular closed pipe network formed by sequentially connecting a plurality of connecting pipelines end to end, and any air pressure station can convey compressed air for any power gas user through the circular closed pipe network. For example, the power gas pipe network C1-C2-C3 is a triangular closed pipe network formed by sequentially and annularly connecting a first power gas pipe 41, a second power gas pipe 42 and a third power gas pipe 43. It is understood that the power gas piping network C1-C2-C3 may also be a quadrilateral closed piping network, a pentagonal closed piping network, or the like.
Exemplarily, the instrument gas pipe network D1-D2-D3 is an annular closed pipe network formed by sequentially connecting a plurality of connecting pipelines end to end, and any air pressure station can convey compressed air for any instrument gas user through the annular closed pipe network. For example, the instrument gas pipe network D1-D2-D3 is a triangular closed pipe network formed by sequentially and annularly connecting a first instrument gas pipe 51, a second instrument gas pipe 52 and a third instrument gas pipe 53. It is understood that the instrument gas piping network D1-D2-D3 may also be of the quadrilateral closed piping network, pentagonal closed piping network, or the like.
The buffer gas container 6 stores nitrogen gas and is connected to the instrument gas piping network D1-D2-D3 through a nitrogen gas control valve 71. When the pressure value of the instrument gas pipe network D1-D2-D3 is lower than the critical value, the nitrogen control valve 71 is conducted to enable the nitrogen of the buffer gas container 6 to flow into the instrument gas pipe network D1-D2-D3, temporary gas supply is provided for the transition stage, the gas pressure of the instrument gas pipe network D1-D2-D3 is prevented from dropping suddenly, and gas supply fluctuation and gas pressure fluctuation of the air pipe network, particularly the instrument gas pipe network D1-D2-D3 cannot occur.
On one hand, when the standby unit exists, the nitrogen of the buffer gas container 6 ensures that the pressure of the pipe network in the transition stage after the fault unit fails and before the standby unit is started is stable; on the other hand, when the industrial equipment as a gas user needs to be shut down without the standby unit, the nitrogen gas in the buffer gas container 6 ensures that the gas pressure of the pipe network in the transition stage after the fault unit fails and before the industrial equipment is safely shut down, so that the industrial equipment can be safely shut down, and safety accidents caused by sudden shutdown can be prevented.
In particular, since the buffer gas container 6 itself stores sufficient nitrogen, when the power grid is temporarily cut off due to an accident, the buffer gas container 6 can still be rapidly opened without being affected by the accident to supply nitrogen, and a temporary pressure stabilizing effect is provided for the air pipe network system until the nitrogen is exhausted, so that the industrial equipment can be safely shut down.
Obviously, the air pipe network system of the embodiment has the advantages of rapid response, smooth transition and good safety, and is not influenced by the fluctuation of sudden accidents or faults.
Wherein, the buffer gas container 6 can be realized by adopting a pressure container form such as a gas bottle, a gas tank and the like. The critical value is preset according to the actual working condition of the instrument gas pipe network D1-D2-D3 and belongs to the safe air pressure critical value of the instrument gas pipe network D1-D2-D3 and instrument gas users. Exemplarily, the critical value is not lower than 0.48 MPa. The nitrogen control valve 71 is exemplarily a control valve that is automatically turned on and manually reset. In other words, when the pressure value of the instrument gas piping network D1-D2-D3 is lower than the critical value, the nitrogen control valve 71 is automatically turned on; after the safety of the air pipe network system is confirmed, the nitrogen control valve 71 is manually and slowly closed to a full-closed state, so that the mistaken closing is prevented, and the system safety is further improved.
The nitrogen pressure value of the buffer gas container 6 should ensure the rapid pressure stabilizing effect on the instrument gas pipe network D1-D2-D3, so that the gas pressure of the instrument gas pipe network D1-D2-D3 is rapidly increased to be above a critical value. Exemplarily, the pressure value of the nitrogen in the buffer gas container 6 is 2.5-3 MPa.
The buffer gas container 6 is illustratively connected to a nitrogen gas source line through an inflation control valve 72 for replenishing nitrogen gas from the nitrogen gas source. When the gas filling control valve 72 is opened, the line between the buffer gas container 6 and the nitrogen gas source is opened, so that nitrogen gas flows from the nitrogen gas source into the buffer gas container 6.
Illustratively, a check valve 73 (i.e., a one-way valve) is disposed in the connecting line between the buffer gas container 6 and the instrument gas piping network D1-D2-D3. The input end of the check valve 73 is connected with the buffer gas container 6, so that the gas path between the buffer gas container 6 and the instrument gas pipe network D1-D2-D3 is in one-way conduction, and the gas in the instrument gas pipe network D1-D2-D3 is prevented from flowing back to the buffer gas container 6. It is understood that the check valve 73 may be provided on the pipe between the nitrogen control valve 71 and the buffer gas container 6, or the nitrogen control valve 71 may be provided on the pipe between the check valve 73 and the buffer gas container 6.
Illustratively, the nitrogen control valve 71 is connected at one end to the output of the buffer gas container 6 and at the other end to the instrument gas piping network D1-D2-D3 through a manually controlled valve 74. In normal operation, the manual control valve 74 is kept normally open, allowing the nitrogen control valve 71 to be in communication with the instrument gas piping network D1-D2-D3. When the working condition is abnormal, the manual control valve 74 is manually closed, so that the nitrogen control valve 71 is isolated from the gas circuit of the instrument gas pipe network D1-D2-D3 to realize safety protection.
Example 2
The embodiment discloses an air pipe network system control method which is applied to the air pipe network system disclosed in the embodiment 1. The control method comprises the following steps:
step A: and determining the air compression station with the accident/fault and the air compressor unit with the accident/fault in the air compression station. In other words, it is determined which one or more of the air compressor stations has/has failed, and it is subsequently determined which one or more of the air compressor trains has/has failed.
And B: and judging whether an air compressor unit which does not have the accident or the fault and is kept idle exists in the air compressor station with the accident/fault, and if so, starting the air compressor unit to serve as a standby unit. Otherwise, a standby machine needs to be determined in other air compression stations, namely, whether an air compressor unit which has no accident or fault and is kept idle exists in the other air compression stations is judged, if so, the air compressor unit is started, otherwise, an alarm is given out, and the nitrogen control valve 71 is conducted to enable the nitrogen in the buffer gas container 6 to flow into the instrument gas pipe network D1-D2-D3.
And C: at any time, when the pressure value of the instrument gas pipe network D1-D2-D3 is lower than the critical value, the nitrogen control valve 71 is turned on to make the nitrogen gas in the buffer gas container 6 flow into the instrument gas pipe network D1-D2-D3; when the pressure value of the meter gas piping network D1-D2-D3 is not lower than the critical value, the nitrogen control valve 71 is closed.
Illustratively, the nitrogen control valve 71 is automatically turned on and manually reset.
It should be noted that the above-described control method can be implemented by a control unit provided in the air line system. That is, the control unit executes the aforementioned determination step (step a), judgment and activation apparatus step (step B), and nitrogen control valve 71 control step (step C).
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (8)
1. An air hose net system, comprising:
the power gas pipe network is provided with a power user branch for accessing a power gas user;
the instrument gas pipe network is provided with an instrument user branch for accessing an instrument gas user;
the system comprises a power gas pipe network, an instrument gas pipe network, a plurality of air compression stations, a plurality of air compression units and a control system, wherein any air compression station is connected to the power gas pipe network and the instrument gas pipe network through an outbound control valve respectively and is provided with a plurality of air compression units;
the buffer gas container is stored with nitrogen and is connected to the instrument gas pipe network through a nitrogen control valve, when the pressure value of the instrument gas pipe network is lower than a critical value, the nitrogen control valve is switched on to enable the nitrogen of the buffer gas container to flow into the instrument gas pipe network, a check valve is arranged in a connecting pipeline of the buffer gas container and the instrument gas pipe network, the input end of the check valve is connected with the buffer gas container, and the nitrogen control valve is a control valve which is switched on automatically and is reset manually.
2. The air piping system according to claim 1, wherein the pressure value of nitrogen gas in the buffer gas container is 2.5 to 3 MPa; the buffer gas container is connected with a nitrogen source pipeline through an inflation control valve.
3. The air hose network system of claim 1, wherein the nitrogen control valve is connected to the buffer gas container at one end and to the instrument gas hose network at the other end by a manually controlled valve.
4. The air hose network system according to claim 1, wherein the power gas hose network is an annular closed hose network formed by connecting a plurality of connecting pipes end to end in sequence, and any one of the air compression stations can deliver compressed air to any one of the power gas users through the annular closed hose network.
5. The air hose network system according to claim 1, wherein the instrument gas hose network is a circular closed hose network formed by connecting a plurality of connecting pipes end to end in sequence, and any one of the air compression stations can deliver compressed air to any instrument gas user through the circular closed hose network.
6. The air hose network system of claim 1, wherein the number of air compression stations is at least three; and/or the critical value is 0.48 MPa.
7. An air hose system control method applied to the air hose system according to any one of claims 1 to 6, characterized by comprising:
determining an air compression station with an accident/fault and an air compressor unit with the accident/fault in the air compression station;
judging whether an air compressor unit which does not have accidents or faults and is kept idle exists in the air compression station with the accidents/faults, if so, starting the air compressor unit, otherwise, judging whether air compressor units which do not have accidents or faults and are kept idle exist in other air compression stations, if so, starting the air compressor unit, otherwise, giving an alarm and conducting the nitrogen control valve to enable nitrogen of the buffer gas container to flow into the instrument gas pipe network;
at any moment, when the pressure value of the instrument gas pipe network is lower than a critical value, the nitrogen control valve is conducted to enable the nitrogen of the buffer gas container to flow into the instrument gas pipe network; and when the pressure value of the instrument gas pipe network is not lower than the critical value, the nitrogen control valve is closed.
8. The control method according to claim 7, wherein the nitrogen control valve is automatically turned on and manually reset.
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| JPH0989200A (en) * | 1995-09-20 | 1997-03-31 | Toshiba Mach Co Ltd | Automatic drainage treatment device in pneumatic pressure supplying circuit |
| CN201507785U (en) * | 2009-10-12 | 2010-06-16 | 胡仲辉 | Independent-gas supply gas pipe network of factory |
| CN103322411B (en) * | 2013-07-16 | 2015-07-22 | 兖矿集团有限公司 | Chemical system stoppage protective device |
| CN203978784U (en) * | 2014-07-21 | 2014-12-03 | 上海大众祥源动力供应有限公司 | Improve the steam line networked devices of air compressor plant operational efficiency |
| CN204420579U (en) * | 2015-02-02 | 2015-06-24 | 云南新立有色金属有限公司 | For the gas supply system of high-Ti slag process units |
| CN106523330B (en) * | 2015-09-11 | 2019-09-20 | 宝山钢铁股份有限公司 | A kind of multisystem air compression station compressed air is incorporated into the power networks pressure difference compensation control method |
| CN106523329B (en) * | 2015-09-11 | 2019-09-20 | 宝山钢铁股份有限公司 | A kind of grid-connected energy-saving operating method of multisystem air compression station compressed air |
| CN206817175U (en) * | 2017-01-12 | 2017-12-29 | 上海振世能源科技有限公司 | Multi-quantity air compression station networking control device |
| CN107762814A (en) * | 2017-09-08 | 2018-03-06 | 瓮福达州化工有限责任公司 | A kind of power-economizing method of air compressor system |
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