阅读说明：本技术 一种紧急停车系统及后备系统、空分装置 (Emergency stop system, backup system and air separation device ) 是由 杨超 陈泉 杨广普 蒋涛 廖列成 夏云龙 于 2020-08-11 设计创作，主要内容包括：本发明公开了一种紧急停车系统,涉及储槽紧急停车系统技术领域,包括：电源模块、安全继电器A12、安全继电器A13、安全继电器A14、安全继电器A12的负荷、安全继电器A13的负荷、安全继电器A14的负荷,电源模块分别电路连接安全继电器A12、安全继电器A13和安全继电器A14,安全继电器A12控制安全继电器A12的负荷,安全继电器A13控制安全继电器A13的负荷,安全继电器A14控制安全继电器A14的负荷。另外本发明还公开了后备系统和空分装置。保证了供气的连续性,降低了意外断供的风险。(The invention discloses an emergency stop system, which relates to the technical field of storage tank emergency stop systems and comprises the following components: the power supply module is respectively connected with a load of a safety relay A12, a load of a safety relay A13 and a load of a safety relay A14 in a circuit mode, the safety relay A12 controls the load of a safety relay A12, the safety relay A13 controls the load of a safety relay A13, and the safety relay A14 controls the load of a safety relay A14. In addition, the invention also discloses a backup system and an air separation device. The continuity of air supply is ensured, and the risk of accidental supply interruption is reduced.)

1. An emergency stop system, comprising: the safety relay comprises a power module, a safety relay A12, a safety relay A13, a safety relay A14, a load of a safety relay A12, a load of a safety relay A13 and a load of a safety relay A14, wherein the power module is respectively connected with the safety relay A12, the safety relay A13 and the safety relay A14 in a circuit mode, the safety relay A12 controls the load of the safety relay A12, the safety relay A13 controls the load of the safety relay A13, and the safety relay A14 controls the load of the safety relay A14.

2. The emergency shutdown system of claim 1, wherein the power module comprises a powered UPS power supply 1 with air on.

3. The emergency shutdown system of claim 2, wherein the UPS power with empty on 1 circuit is connected to an emergency shutdown button system.

4. The emergency shutdown system of claim 1, wherein the power module comprises a UPS with empty power supply 1, a UPS with empty power supply 2, and a UPS with empty power supply 3, each electrically connected to the emergency shutdown button system.

5. The emergency shutdown system of claim 4, wherein the UPS power with empty 1 is electrically connected to the safety relay a12, the UPS power with empty 2 is electrically connected to the safety relay a13, and the UPS power with empty 3 is electrically connected to the safety relay a 14.

6. The emergency stop system according to any one of claims 1 to 5, wherein the load of the safety relay A12 comprises a high-pressure liquid oxygen pump A, a backup medium-pressure liquid oxygen pump A, a liquid oxygen tank main tank weight valve A, a liquid oxygen tank auxiliary tank weight valve A, a high-pressure liquid oxygen vaporizer water pump A, and a medium-pressure liquid oxygen vaporizer water pump A.

7. The emergency stop system according to claim 6, wherein the load of the safety relay A13 comprises a high pressure liquid oxygen pump B, a medium pressure liquid oxygen pump B, a liquid oxygen tank main tank weight valve B, a liquid oxygen tank auxiliary tank weight valve B, a high pressure liquid oxygen vaporizer water pump B, and a medium pressure liquid oxygen vaporizer water pump B.

8. The emergency shutdown system of claim 7, wherein the load of the safety relay a14 comprises a high pressure liquid oxygen pump C, a high pressure liquid oxygen pump D, a liquid oxygen tank main tank weight valve C, a liquid oxygen truck pump, an ultra high pressure liquid oxygen pump, and an ultra high pressure liquid oxygen pump electric heater.

9. A backup system comprising the emergency shutdown system of claim 8.

10. An air separation plant comprising a backup system according to claim 9.

Technical Field

The invention relates to the field of storage tank emergency stop systems, in particular to an emergency stop system, a backup system and an air separation device.

Background

An air separation plant is an abbreviation for air separation plant, also referred to simply as air separation, and is a gas separation plant that liquefies, rectifies, and ultimately separates air into oxygen, nitrogen, and other useful gases, as shown in fig. 1. Because some industries matched with the air separation unit have higher requirement on the continuity of gas supply, once the air separation unit stops due to an accident, the matched equipment is greatly influenced, and even great economic loss is caused. However, the existing air separation plant is a complex system, and the plant is easy to shut down due to a small fault, so that the reliability and the stability of the backup system of the existing air separation plant are insufficient, and the backup system is difficult to supply air uninterruptedly when the air separation plant has a problem and is shut down.

As shown in fig. 2, the emergency stop system of the backup system in the air separation plant is generally designed, and includes three safety relays (respectively identified as a12, a13 and a14) controlled by a UPS power supply with an air switch, the three safety relays are sequentially connected and respectively connected to loads, the loads of the safety relay a12 include a high-pressure liquid oxygen pump a, a high-pressure liquid oxygen pump B, a high-pressure liquid oxygen pump C, a high-pressure liquid oxygen pump D, a medium-pressure liquid oxygen pump a and a medium-pressure liquid oxygen pump B, the loads controlled by a13 include a high-pressure liquid oxygen vaporizer water pump a, a high-pressure liquid oxygen vaporizer water pump B, a medium-pressure liquid oxygen vaporizer water pump a, a medium-pressure liquid oxygen vaporizer water pump B, a liquid oxygen pump, an ultrahigh-pressure liquid oxygen pump and an ultrahigh-pressure liquid oxygen pump electric heater, the loads controlled by a14 include a liquid oxygen tank main tank weight valve a, a liquid oxygen tank weight valve B, a liquid oxygen tank main tank weight valve C, and a liquid oxygen tank auxiliary weight valve a, And a hammer valve B of the auxiliary tank of the liquid oxygen tank. The connection and control mode has certain reliability risk, any safety relay or UPS with an idle switch is in failure, the whole emergency stop system of the backup storage tank is cut off, the supply of the backup system is also interrupted, and hidden danger is brought to continuous and safe operation of downstream devices.

Therefore, those skilled in the art are dedicated to develop an emergency stop system, a backup system, and an air separation plant, so that when the air separation plant is shut down due to a problem, the backup system can supply air continuously, and the purpose of improving the reliability of the backup system of the air separation plant is achieved without reducing the safety.

Disclosure of Invention

In view of the defects in the prior art, the invention aims to solve the technical problem that when the air separation unit is shut down due to problems, the backup system supplies air uninterruptedly, so that the reliability of the backup system of the air separation unit is improved.

In order to achieve the above purpose, the inventor has found through research that when one UPS power supply with idle switch controls three safety relays, and when the UPS power supply with idle switch fails, the normal operation of the three safety relays and the loads thereof may be affected. The inventors used 3 UPS power supplies with blanking on to control 3 safety relays, respectively. Meanwhile, in the mode that the three safety relays (A12, A13 and A14) are sequentially connected, when one safety relay is broken due to a problem, the relay behind the safety relay is influenced, and the load connected with the corresponding safety relay cannot work normally. For example, if the safety relay a12 is broken, the safety relay a13 and the safety relay a14 cannot operate normally, and the loads connected to the safety relay a12, the safety relay a13 and the safety relay a14 cannot operate normally. The inventor optimizes the connection mode of the air-break UPS power supply and the three safety relays. In order to further improve the reliability of the emergency stop system, the inventor classifies the loads connected with the safety relays, and changes the way that the loads with the same functions are connected with one safety relay in a centralized way, for example, three main tank weight valves of the liquid oxygen tank are respectively connected with three safety relays instead of one safety relay.

Thus, in one embodiment of the present invention, there is provided an emergency stop system comprising: the power supply module is respectively connected with a load of a safety relay A12, a load of a safety relay A13 and a load of a safety relay A14 in a circuit mode, the safety relay A12 controls the load of a safety relay A12, the safety relay A13 controls the load of a safety relay A13, and the safety relay A14 controls the load of a safety relay A14.

Alternatively, in the emergency stop system in the above embodiment, the power supply module includes the UPS power supply 1 with an air switch.

Further, in the emergency stop system in the above embodiment, the UPS power supply 1 with an air switch is electrically connected to the emergency stop button system.

Optionally, in the emergency stop system in the above embodiment, the power module includes a UPS power supply 1 with idle switch, a UPS power supply 2 with idle switch, and a UPS power supply 3 with idle switch, each being electrically connected to the emergency stop button system.

Alternatively, in the emergency stop system in the above embodiment, the UPS power supply 1 with idling on is electrically connected to the safety relay a12, the UPS power supply 2 with idling on is electrically connected to the safety relay a13, and the UPS power supply 3 with idling on is electrically connected to the safety relay a 14.

Optionally, in the emergency stop system in any of the above embodiments, the load of the safety relay a12 includes a high-pressure liquid oxygen pump a, a backup medium-pressure liquid oxygen pump a, a liquid oxygen tank main tank weight valve a, a liquid oxygen tank auxiliary tank weight valve a, a high-pressure liquid oxygen vaporizer water pump a, and a medium-pressure liquid oxygen vaporizer water pump a.

Optionally, in the emergency stop system in any of the above embodiments, the load of the safety relay a13 includes a high-pressure liquid oxygen pump B, a medium-pressure liquid oxygen pump B, a liquid oxygen tank main tank weight valve B, a liquid oxygen tank auxiliary tank weight valve B, a high-pressure liquid oxygen vaporizer water pump B, and a medium-pressure liquid oxygen vaporizer water pump B.

Optionally, in the emergency stop system in any of the above embodiments, the load of the safety relay a14 includes a high-pressure liquid oxygen pump C, a high-pressure liquid oxygen pump D, a liquid oxygen tank main tank weight valve C, a liquid oxygen truck pump, an extra-high pressure liquid oxygen pump, and an extra-high pressure liquid oxygen pump electric heater.

The present invention provides a backup system comprising an emergency shutdown system as in any one of the above embodiments.

The invention provides an air separation plant, which comprises a backup system in the embodiment.

On one hand, the invention adds two UPS power supplies with idle switches, so that each UPS power supply with idle switches corresponds to one safety relay; on the other hand, the connection of the three safety relays is adjusted, so that each safety relay is independent; in addition, the load controlled by each safety relay is redistributed, and the high-pressure liquid oxygen pump, the medium-pressure liquid oxygen pump, the high-pressure liquid oxygen vaporizer water pump, the medium-pressure liquid oxygen vaporizer water pump and the weight valve are redistributed to be uniformly distributed on the three safety relays. Therefore, the fault of any UPS with an air switch or safety relay is realized, only part of the hammer valve, the high-pressure liquid oxygen pump, the medium-pressure liquid oxygen pump, the high-pressure liquid oxygen vaporizer water pump and the medium-pressure liquid oxygen vaporizer water pump are affected, the whole backup system is not triggered and cut off, the continuity of air supply is ensured, and the risk of accidental supply interruption is reduced.

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

Drawings

Fig. 1 is a schematic structural view illustrating a conventional air separation plant according to an exemplary embodiment;

fig. 2 is a schematic structural view illustrating a conventional emergency stop system according to an exemplary embodiment;

fig. 3 is a schematic structural diagram illustrating an emergency stop system according to an exemplary embodiment;

FIG. 4 is a block diagram illustrating a backup system in accordance with an exemplary embodiment;

fig. 5 is a schematic diagram illustrating the structure of an air separation plant according to an exemplary embodiment.

Detailed Description

The technical contents of the preferred embodiments of the present invention will be more clearly and easily understood by referring to the drawings attached to the specification. The present invention may be embodied in many different forms of embodiments and the scope of the invention is not limited to the embodiments set forth herein.

In the drawings, structurally identical elements are represented by like reference numerals, and structurally or functionally similar elements are represented by like reference numerals throughout the several views. The size and thickness of each component shown in the drawings are arbitrarily illustrated, and the present invention is not limited to the size and thickness of each component. The thickness of the components is exaggerated somewhat schematically and appropriately in order to make the illustration clearer.

As shown in fig. 1, the conventional air separation plant includes an air compressor, a pre-cooling system, a purification system, a booster, an expander, a heat exchanger, a distillation system and a conventional backup system, and finally produces an oxygen and nitrogen product. The conventional backup system comprises a conventional emergency parking system, as shown in fig. 2, the conventional emergency parking system is formed by connecting three safety relays, namely an air switch (air switch) UPS power supply circuit, the safety relays are respectively a safety relay A12, a safety relay A13 and a safety relay A14, the three safety relays are sequentially connected in a circuit mode and respectively control respective loads, the loads of the safety relay A12 comprise a high-pressure liquid oxygen pump A, a high-pressure liquid oxygen pump B, a high-pressure liquid oxygen pump C, a high-pressure liquid oxygen pump D, a medium-pressure liquid oxygen pump A and a medium-pressure liquid oxygen pump B, the loads controlled by the A13 comprise a high-pressure liquid oxygen vaporizer water pump A, a high-pressure liquid oxygen vaporizer water pump B, a medium-pressure liquid oxygen vaporizer water pump A, a medium-pressure liquid oxygen vaporizer water pump B, a liquid oxygen truck pump, an ultrahigh-pressure liquid oxygen pump and an ultrahigh pressure liquid oxygen pump electric heater, the loads controlled by the A14 comprise a liquid oxygen tank main tank weight valve A, a liquid oxygen tank weight, A liquid oxygen tank main tank weight valve C, a liquid oxygen tank auxiliary tank weight valve A and a liquid oxygen tank auxiliary tank weight valve B. The inventor finds that the connection and control mode has reliability risks through analysis of a conventional emergency stop system, any safety relay or UPS with an idle switch is in failure, the whole emergency stop system of the backup storage tank is cut off, the supply of the backup system is also interrupted, and potential hazards are brought to continuous and safe operation of downstream devices.

In order to solve the problem of the conventional emergency stop system and allow the backup system to supply air uninterruptedly when the air separation unit has a problem and is shut down, the purpose of improving the reliability of the backup system of the air separation unit is achieved, the inventor provides an emergency stop system, as shown in fig. 3, including: the power supply module is respectively connected with a load of a safety relay A12, a load of a safety relay A13 and a load of a safety relay A14 in a circuit mode, the safety relay A12 controls the load of a safety relay A12, the safety relay A13 controls the load of a safety relay A13, and the safety relay A14 controls the load of a safety relay A14. The power module comprises an air-on UPS power supply 1, an air-on UPS power supply 2 and an air-on UPS power supply 3 which are respectively connected with the emergency stop button system through circuits. The UPS power supply 1 with the air switch is connected with a safety relay A12 in a circuit mode, the UPS power supply 2 with the air switch is connected with a safety relay A13 in a circuit mode, and the UPS power supply 3 with the air switch is connected with a safety relay A14 in a circuit mode. Load of safety relay a 12; the system comprises a high-pressure liquid oxygen pump A, a backup medium-pressure liquid oxygen pump A, a liquid oxygen tank main tank weight valve A, a liquid oxygen tank auxiliary tank weight valve A, a high-pressure liquid oxygen vaporizer water pump A and a medium-pressure liquid oxygen vaporizer water pump A; the load of the safety relay A13 comprises a high-pressure liquid oxygen pump B, a medium-pressure liquid oxygen pump B, a main tank weight valve B of the liquid oxygen tank, an auxiliary tank weight valve B of the liquid oxygen tank, a high-pressure liquid oxygen vaporizer water pump B and a medium-pressure liquid oxygen vaporizer water pump B; the load of the safety relay A14 comprises a high-pressure liquid oxygen pump C, a high-pressure liquid oxygen pump D, a main tank weight valve C of the liquid oxygen tank, a liquid oxygen truck pump, an ultrahigh-pressure liquid oxygen pump and an ultrahigh-pressure liquid oxygen pump electric heater.

Further, the inventors provide a backup system, as shown in fig. 4, using the emergency stop system in the above embodiment.

Further, the inventors provide an air separation plant, as shown in fig. 5, using the backup system in the above embodiment.

The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.