DCS network system of solvent recovery device

Abstract

The utility model discloses a DCS (Distributed Control System) network system of a solvent recovery device. The DCS network system comprises an upper computer, the upper computer is connected with an A-zone control room, the A-zone control room is connected with a B-zone control room, an A-zone control chamber is arranged outside the A-zone control room, and a B-zone control chamber is arranged outside the B-zone control room; a first switch is arranged in the A-area control room, is connected with an upper computer, and is connected with a control cabinet, a first frequency conversion cabinet and a power supply cabinet; and a second switch is arranged in the B-area control room, is connected with the first switch, and is connected with a second frequency conversion cabinet. According to the application, the switch is arranged, so that the communication problem when the distance between the solvent recovery areas is relatively long is solved; the star network is adopted, so that faults in a control room with centralized nodes are easy to remove, and the ring network is adopted, so that communication of other nodes is not affected when any node in dispersed nodes outside the control room fails, and investment is low.

Description

Technical Field

[0001] The utility model relates to the technical field of organic waste gas solvent recovery, in particular to a DCS network system for a solvent recovery device. Background Art

[0002] At present, DCS systems for organic waste gas solvent recovery generally lack a reasonable network topology structure, resulting in problems such as unstable operation and poor reliability, which directly affect the stability, reliability, and real-time performance of DCS systems for organic waste gas solvent recovery. For example, the PROFIBUS fieldbus control system used in the early stage is prone to problems such as the loss of backend nodes and slow transmission rate after disconnection; the subsequent PROFINET system has a star network architecture, and there are also problems such as occupying a large number of switch interfaces, poor economy, and limited transmission distance. Based on this, it is necessary to develop a new DCS system for organic waste gas solvent recovery to solve the problem of the lack of a reasonable network topology structure in existing DCS systems for organic waste gas solvent recovery. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a DCS network system for a solvent recovery device, which solves the problem that the DCS system for organic waste gas solvent recovery in the prior art lacks a reasonable network topology structure, resulting in unstable operation and poor reliability.

[0004] The technical solution adopted by the utility model is that the DCS network system for a solvent recovery device includes a host computer. The host computer is connected to the control room in Area A through a PN network cable. The control room in Area A is connected to the control room in Area B through an optical fiber. Outside the control room in Area A, there is an outside of the control room in Area A, and outside the control room in Area B, there is an outside of the control room in Area B.

[0005] The characteristics of the utility model also lie in that:

[0006] A first switch is arranged in the control room in Area A. The first switch is connected to the host computer, and a control cabinet, a first frequency conversion cabinet, and a power supply cabinet are connected to the first switch.

[0007] A second switch is arranged in the control room in Area B. The second switch is connected to the first switch, and a second frequency conversion cabinet is connected to the second switch.

[0008] A first explosion-proof box and a second explosion-proof box are respectively arranged outside the control room in Area A and outside the control room in Area B.

[0009] The host computer is arranged in the control room of the recovery device.

[0010] A first distributed I / O and a first frequency converter group connected through a PN network cable are arranged in the first frequency conversion cabinet. The first distributed I / O and the first frequency converter group are respectively connected to the first switch.

[0011] The control cabinet is provided with a second distributed I / O and a PLC controller, and the second distributed I / O and the PLC controller are respectively connected to the first switch.

[0012] The power supply cabinet is provided with a power supply box and a third distributed I / O, and the power supply box and the third distributed I / O are respectively connected to the first switch.

[0013] There are multiple groups of first explosion-proof boxes installed inside and outside the control room in Area A. The multiple groups of first explosion-proof boxes are connected end to end through PN network cables to form a ring network structure.

[0014] The first explosion-proof box is provided with a fourth distributed I / O and a first valve island group, and the fourth distributed I / O and the first valve island group are respectively connected to the first switch.

[0015] The second frequency conversion cabinet is provided with a fifth distributed I / O and a second frequency converter group. The fifth distributed I / O and the second frequency converter group are respectively connected to the second switch through PN network cables.

[0016] There are multiple groups of second explosion-proof boxes installed inside and outside the control room in Area B. The multiple groups of second explosion-proof boxes are connected end to end through PN network cables to form a ring network structure. The second explosion-proof box is provided with a sixth distributed I / O and a second valve island group, and the sixth distributed I / O and the second valve island group are respectively connected to the second switch.

[0017] The numbers of the first distributed I / O, the first frequency converter group, the fifth distributed I / O, and the second frequency converter group are all multiple.

[0018] The beneficial effects of the present utility model are as follows: The DCS network system of the solvent recovery device of the present utility model includes two control rooms in Area A and Area B and their external ring networks. Switches with fiber optic ports are set in both the control room in Area A and the control room in Area B, solving the communication problem when the distance between solvent recovery areas is relatively far; in the control room in Area A and the control room in Area B, each node is connected to the switch through a star network architecture, making it easier to troubleshoot inside the control room where nodes are concentrated, and the connection of other nodes will not be affected if one node fails, and the faulty node can be removed arbitrarily; outside the control room in Area A and outside the control room in Area B, each node is connected through a ring network architecture, so that the communication of other nodes will not be affected even if any node fails among the scattered nodes outside the control room, and the investment is relatively small. There is only one network cable outside to connect each node in series, and each external node can serve as a small switch relay, making the transmission distance farther, overcoming the problems of unreasonable network topology layout, unstable operation, and poor reliability in the prior art. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the network architecture of the DCS network system of the solvent recovery device;

[0020] Figure 2 It is a schematic diagram of the specific structure of the DCS network system of the solvent recovery device

[0021] Figure 3 It is a schematic diagram of the architecture of the control room in Area A of the DCS network system of the solvent recovery device;

[0022] Figure 4 It is a schematic diagram of the architecture of the control room in Area B of the DCS network system of the solvent recovery device;

[0023] Figure 5 It is a schematic diagram of the network system structure adopted in Embodiment 1 of the DCS network system of the solvent recovery device.

[0024] In the figure, 1. Host computer, 2. Control room in Area A, 3. Outside the control room in Area A, 4. Control room in Area B, 5. Outside the control room in Area B; 2-1. First switch, 2-2. Control cabinet, 2-3. First distributed I / O, 2-4. First frequency converter group; 2-5. First frequency conversion cabinet, 2-6. Power supply cabinet, 2-7. PLC controller, 2-8. Second distributed I / O, 2-9. Power supply box, 2-10. Third distributed I / O; 3-1. First explosion-proof box, 3-2. Fourth distributed I / O, 3-3. First valve island group; 4-1. Second switch, 4-2. Fifth distributed I / O, 4-3. Second frequency converter group, 4-4. Second frequency conversion cabinet; 5-1. Second explosion-proof box, 5-2. Sixth distributed I / O, 5-3. Second valve island group. Detailed implementation manners

[0025] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0026] The DCS network system of the solvent recovery device has a structure as Figure 1 and Figure 2 shown, including a host computer 1. The host computer 1 is arranged in the control room of the solvent recovery device. The host computer 1 is connected to the control room in Area A 2 through a PN network cable. The control room in Area A 2 is connected to the control room in Area B 4 through an optical fiber. Outside the control room in Area A 2, there is an outside area of the control room in Area A 3. Outside the control room in Area B 4, there is an outside area of the control room in Area B 5; A switch with an optical fiber port is arranged between the control room in Area A and the control room in Area B, mainly for solving the communication problem when the distance between the solvent recovery areas is relatively long.

[0027] As Figure 2As shown in the figure, a first switch 2-1 is installed in the control room 2 of Area A. The first switch 2-1 is connected to the upper computer 1, and the connection between the first switch 2-1 and the upper computer 1 enables human-machine interaction. The control cabinet 2-2, the first frequency conversion cabinet 2-5, and the power supply cabinet 2-6 are connected to the first switch 2-1; in the first frequency conversion cabinet 2-5, a first distributed I / O 2-3 and a first frequency converter group 2-4 connected by a PN network cable are installed, and the first distributed I / O 2-3 and the first frequency converter group 2-4 are respectively connected to the first switch 2-1. In the control cabinet 2-2, a second distributed I / O 2-8 and a PLC controller 2-7 are installed, and the second distributed I / O 2-8 and the PLC controller 2-7 are respectively connected to the first switch 2-1. In the power supply cabinet 2-6, a power supply box 2-9 and a third distributed I / O 2-10 are installed, and the power supply box 2-9 and the third distributed I / O 2-10 are respectively connected to the first switch 2-1. As Figure 3 shown, in the control room 2 of Area A, the first distributed I / O 2-3, the first frequency converter group 2-4, the second distributed I / O 2-8, the PLC controller 2-7, the power supply box 2-9, and the third distributed I / O 2-10 are connected to each node by the first switch 2-1 in the form of a star network architecture; multiple first explosion-proof boxes 3-1 are installed outside the control room 3 of Area A, and multiple first explosion-proof boxes 3-1 are connected end to end by a PN network cable to form a ring network structure. A fourth distributed I / O 3-2 and a first valve island group 3-3 are installed in the first explosion-proof box 3-1, and the fourth distributed I / O 3-2 and the first valve island group 3-3 are respectively connected to the first switch 2-1.

[0028] As Figure 2 shown, a second switch 4-1 is installed in the control room 4 of Area B. The second switch 4-1 is connected to the first switch 2-1, and the second frequency conversion cabinet 4-4 is connected to the second switch 4-1; in the second frequency conversion cabinet 4-4, a fifth distributed I / O 4-2 and a second frequency converter group 4-3 are installed, and the fifth distributed I / O 4-2 and the second frequency converter group 4-3 are respectively connected to the second switch 4-1 through a PN network cable. As Figure 4 shown, in the control room 4 of Area B, multiple fifth distributed I / O 4-2 and multiple second frequency converter groups 4-3 are connected to each node by the second switch 4-1 in the form of a star network architecture. Multiple second explosion-proof boxes 5-1 are installed outside the control room 5 of Area B. The second explosion-proof boxes 5-1 are multiple groups, and multiple groups of second explosion-proof boxes 5-1 are connected end to end by a PN network cable to form a ring network structure. A sixth distributed I / O 5-2 and a second valve island group 5-3 are installed in the second explosion-proof box 5-1, and the sixth distributed I / O 5-2 and the second valve island group 5-3 are respectively connected to the second switch 4-1.

[0029] In the above-mentioned DCS network system of the solvent recovery device, the network connection methods in the control room of Area A, outside the control room 3 of Area A, the control room 4 of Area B, and outside the control room 5 of Area B are asFigure 3 and Figure 4 as shown in

[0030] The solution of the present application will be described below through embodiments:

[0031] Embodiment 1:

[0032] The DCS network system of the solvent recovery device includes a host computer 1. The host computer 1 is connected to the control room 2 in Area A through a PN network cable. The control room 2 in Area A is connected to the control room 4 in Area B through an optical fiber. Outside the control room 2 in Area A, there is an outside control room 3 in Area A, and outside the control room 4 in Area B, there is an outside control room 5 in Area B. Inside the control room 2 in Area A, there is a first switch 2-1. The first switch 2-1 is connected to the host computer 1, and the control cabinet 2-2, the first frequency conversion cabinet 2-5, and the power supply cabinet 2-6 are connected to the first switch 2-1. Inside the control room 4 in Area B, there is a second switch 4-1. The second switch 4-1 is connected to the first switch 2-1, and the second frequency conversion cabinet 4-4 is connected to the second switch 4-1. The first explosion-proof box 3-1 and the second explosion-proof box 5-1 are respectively arranged outside the control room 3 in Area A and outside the control room 5 in Area B.

[0033] Embodiment 2:

[0034] The DCS network system of the solvent recovery device includes a host computer 1. The host computer 1 is arranged in the control room of the recovery device. The host computer 1 is connected to the control room 2 in Area A through a PN network cable. The control room 2 in Area A is connected to the control room 4 in Area B through an optical fiber. Outside the control room 2 in Area A, there is an outside control room 3 in Area A, and outside the control room 4 in Area B, there is an outside control room 5 in Area B. Inside the control room 2 in Area A, there is a first switch 2-1. The first switch 2-1 is connected to the host computer 1, and the control cabinet 2-2, the first frequency conversion cabinet 2-5, and the power supply cabinet 2-6 are connected to the first switch 2-1. Inside the control room 4 in Area B, there is a second switch 4-1. The second switch 4-1 is connected to the first switch 2-1, and the second frequency conversion cabinet 4-4 is connected to the second switch 4-1. The first explosion-proof box 3-1 and the second explosion-proof box 5-1 are respectively arranged outside the control room 3 in Area A and outside the control room 5 in Area B.

[0035] Compared with Embodiment 1 of the present invention, in this embodiment, a first distributed I / O 2-3 and a first frequency converter group 2-4 connected through a PN network cable are arranged in the first frequency conversion cabinet 2-5. The first distributed I / O 2-3 and the first frequency converter group 2-4 are respectively connected to the first switch 2-1. A second distributed I / O 2-8 and a PLC controller 2-7 are arranged in the control cabinet 2-2. The second distributed I / O 2-8 and the PLC controller 2-7 are respectively connected to the first switch 2-1. A power supply box 2-9 and a third distributed I / O 2-10 are arranged in the power supply cabinet 2-6. The power supply box 2-9 and the third distributed I / O 2-10 are respectively connected to the first switch 2-1.

[0036] Embodiment 3:

[0037] The DCS network system of the solvent recovery device includes a host computer 1, which is arranged in the control room of the recovery device. The host computer 1 is connected to the control room 2 of Area A through a PN network cable. The control room 2 of Area A is connected to the control room 4 of Area B through an optical fiber. Outside the control room 2 of Area A, there is an outside of the control room 3 of Area A, and outside the control room 4 of Area B, there is an outside of the control room 5 of Area B. Inside the control room 2 of Area A, there is a first switch 2-1, which is connected to the host computer 1. On the first switch 2-1, there are connected a control cabinet 2-2, a first frequency conversion cabinet 2-5, and a power supply cabinet 2-6. Inside the control room 4 of Area B, there is a second switch 4-1, which is connected to the first switch 2-1. On the second switch 4-1, there is connected a second frequency conversion cabinet 4-4. Outside the control room 3 of Area A and outside the control room 5 of Area B, there are respectively arranged a first explosion-proof box 3-1 and a second explosion-proof box 5-1. Inside the first frequency conversion cabinet 2-5, there are a first distributed I / O 2-3 and a first frequency converter group 2-4 connected through a PN network cable, and the first distributed I / O 2-3 and the first frequency converter group 2-4 are respectively connected to the first switch 2-1. Inside the control cabinet 2-2, there are a second distributed I / O 2-8 and a PLC controller 2-7, and the second distributed I / O 2-8 and the PLC controller 2-7 are respectively connected to the first switch 2-1. Inside the power supply cabinet 2-6, there are a power supply box 2-9 and a third distributed I / O 2-10, and the power supply box 2-9 and the third distributed I / O 2-10 are respectively connected to the first switch 2-1.

[0038] Compared with Embodiment 2, in this embodiment, there are multiple groups of the first explosion-proof boxes 3-1 arranged inside the outside of the control room 3 of Area A, and the multiple groups of the first explosion-proof boxes 3-1 are connected end to end through a PN network cable to form a ring network structure. Inside the first explosion-proof box 3-1, there are a fourth distributed I / O 3-2 and a first valve island group 3-3, and the fourth distributed I / O 3-2 and the first valve island group 3-3 are respectively connected to the first switch 2-1. Inside the second frequency conversion cabinet 4-4, there are a fifth distributed I / O 4-2 and a second frequency converter group 4-3, and the fifth distributed I / O 4-2 and the second frequency converter group 4-3 are respectively connected to the second switch 4-1 through a PN network cable.

[0039] Embodiment 4:

[0040] The DCS network system of the solvent recovery device, the specific structure is as Figure 5 shown: Figure 5 The corresponding contents of the Class A area and the Class C area in

[0041] correspond to Area B and Area A in the corresponding content. Since the fire protection grades of the Class A area and the Class C area are different, they are usually separated by several hundred meters or even thousands of meters; an optical fiber is used to transmit the signals in the Class A area to the Class C area for arithmetic processing;

[0042] The host computer 1 is arranged in the control room of the solvent recovery device.

[0043] Among them, the solvent recovery Class C area (Area A) has relatively low fire prevention requirements. Inside the Class C area, a first switch 2-1, a first distributed I / O 2-3, a first frequency converter group 2-4, a second distributed I / O 2-8, a PLC controller 2-7, a power supply box 2-9, and a third distributed I / O 2-10 are placed. The above nodes are connected one by one through the first switch 2-1, and IP addresses are set to form a star network architecture. Outside the control room, a fourth distributed I / O 3-2 and a first valve island group 3-3 are placed. The fourth distributed I / O 3-2 and the first valve island group 3-3 can be used as relay repeaters to be serially connected to the nodes adjacent to it on the left and right, forming a ring network architecture and finally connecting back to the first switch 2-1 inside the control room.

[0044] The solvent recovery Class A area (Area B) has relatively high fire prevention requirements. Inside the control room, a second switch 4-1, a second frequency conversion cabinet 4-4, and a fifth distributed I / O 4-2 are set up. The above nodes are connected one by one through the second switch 4-1, and IP addresses are set to form a star network architecture. Outside the control room, a sixth distributed I / O 5-2 and a second valve island group 5-3 are placed. The sixth distributed I / O 5-2 and the second valve island group 5-3 can be used as relay repeaters to be serially connected to the nodes adjacent to it on the left and right, forming a ring network architecture and finally connecting back to the second switch 4-1 inside the control room.

[0045] To sum up, the communication problem at a long distance is solved by connecting the Class A area and the Class C area through optical fibers. The components inside the control room form a star network architecture, making it easier to troubleshoot inside the control room where nodes are concentrated, and the connection of other nodes will not be affected if one node fails, and the faulty node can be removed arbitrarily. For the components outside the control room, the formation of a ring network architecture enables the communication of other nodes not to be affected if any node fails among the scattered nodes outside the control room, and the investment is small. There is only one network cable outside to connect each node in series, and each node outside can be used as a small switch relay to make the transmission distance farther.

[0046] In the above embodiments, in the Class C area for solvent recovery, the first distributed I / O 2-4, the second distributed I / O 2-8, the third distributed I / O 2-10, and the fourth distributed I / O 3-2 are provided, which are respectively used for information collection and signal transmission in the adsorption, regeneration, and public auxiliary parts during the solvent recovery process. One first frequency converter group 2-4 is set, which are MV-1101A, MV-1101B, MV-1201, and MV-1202 respectively, and are used for motor control in the adsorption, regeneration, and public auxiliary parts during the solvent recovery process. The PLC controller 2-7 is set to process all the signals collected by the distributed I / O in the DCS network system of the solvent recovery device and the actions of valves and motors, etc.; Four groups of first explosion-proof boxes 3-1 are set as relay repeaters and are serially connected to the nodes adjacent to it on the left and right, and collect outdoor field signals through the fourth distributed I / O 3-2 and control the valve actions through the first valve island group 3-3;

[0047] In the Class A area for solvent recovery, the fifth distributed I / O 4-2 and the sixth distributed I / O 5-2 are provided, which are respectively used for information collection and signal transmission in the dehydration and rectification during the solvent recovery process. One second frequency converter group 4-3 is set, which are MV-1801, MP-1322, and MP-1323 respectively, and are used for motor control in the dehydration and rectification during the solvent recovery process. Three groups of second explosion-proof boxes 5-1 are set as relay repeaters and are serially connected to the nodes adjacent to it on the left and right, and collect outdoor field signals through the sixth distributed I / O 5-2 and control the valve actions through the second valve island group 5-3.

Claims

1. The DCS network system of the solvent recovery device is characterized by: The system comprises a host computer (1), wherein the host computer (1) is connected to an area A control room (2) via a PN network cable, the area A control room (2) is connected to an area B control room (4) via an optical fiber, an area A control room exterior (3) is arranged outside the area A control room (2), and an area B control room exterior (5) is arranged outside the area B control room (4); A first switch (2-1) is arranged in the control room (2) of zone A, the first switch (2-1) is connected to the host computer (1), and the first switch (2-1) is connected to a control cabinet (2-2), a first frequency conversion cabinet (2-5) and a power supply cabinet (2-6); A second switch (4-1) is arranged in the control room (4) of zone B, the second switch (4-1) is connected to the first switch (2-1), and the second switch (4-1) is connected to a second frequency conversion cabinet (4-4); A first explosion-proof box (3-1) and a second explosion-proof box (5-1) are respectively arranged outside the control room (3) of zone A and inside the control room (5) of zone B.

2. The DCS network system of the solvent recovery device according to claim 1, characterized in that: The host computer (1) is arranged in a control room of the recovery device.

3. The DCS network system of the solvent recovery device according to claim 2, characterized in that: The first frequency conversion cabinet (2-5) is provided with a first distributed I / O (2-3) and a first frequency converter group (2-4) connected via a PN network cable, and the first distributed I / O (2-3) and the first frequency converter group (2-4) are respectively connected to the first switch (2-1).

4. The DCS network system of the solvent recovery device according to claim 3, characterized in that: The control cabinet (2-2) is provided with a second distributed I / O (2-8) and a PLC controller (2-7), and the second distributed I / O (2-8) and the PLC controller (2-7) are respectively connected to the first switch (2-1).

5. The DCS network system of the solvent recovery device according to claim 4, characterized in that: A power supply box (2-9) and a third distributed I / O (2-10) are arranged in the power supply cabinet (2-6), and the power supply box (2-9) and the third distributed I / O (2-10) are respectively connected to the first switch (2-1).

6. The DCS network system of the solvent recovery device according to claim 5, characterized in that: There are multiple groups of first explosion-proof boxes (3-1) arranged inside the control room (3) of zone A, and the multiple groups of first explosion-proof boxes (3-1) are connected end to end via PN network cables to form a ring network structure.

7. The DCS network system of the solvent recovery device according to claim 6, characterized in that: The first explosion-proof box (3-1) is provided with a fourth distributed I / O (3-2) and a first valve island group (3-3), and the fourth distributed I / O (3-2) and the first valve island group (3-3) are respectively connected to the first switch (2-1).

8. The DCS network system of the solvent recovery device according to claim 7, characterized in that: The second frequency conversion cabinet (4-4) is provided with a fifth distributed I / O (4-2) and a second frequency converter group (4-3), and the fifth distributed I / O (4-2) and the second frequency converter group (4-3) are respectively connected to the second switch (4-1) via a PN network cable.

9. The DCS network system of the solvent recovery device according to claim 8, characterized in that: There are multiple groups of second explosion-proof boxes (5-1) arranged outside the control room (5) of zone B, and the multiple groups of second explosion-proof boxes (5-1) are connected end to end via PN network cables to form a ring network structure. The second explosion-proof boxes (5-1) are provided with a sixth distributed I / O (5-2) and a second valve island group (5-3), and the sixth distributed I / O (5-2) and the second valve island group (5-3) are respectively connected to the second switch (4-1).

10. The DCS network system of the solvent recovery device according to claim 9, characterized in that: The first distributed I / O (2-3), the first inverter group (2-4), the fifth distributed I / O (4-2), and the second inverter group (4-3) are all in multiple numbers.

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