1. Automatic Fire Alarm and Fire Fighting Linkage System

1.1. Overview: A plant-wide automatic fire alarm system is deployed. A centralized fire alarm controller is installed in the guard room, and regional fire alarm controllers are installed in the on-site equipment rooms of each unit. The regional fire alarm controllers and the centralized fire alarm controller are networked in a star topology via 4-core single-mode optical cables.

1.2. Fire Alarm System

1.3. Fire Telephone System

1.4. Fire Broadcast System

2. Industrial and Security Surveillance System

2.1. Industrial Surveillance Television System

2.2. Security Television Surveillance System

3. Computer Network and Structured Cabling System

3.1. The computer network backbone adopts 10G Ethernet optical fiber technology to connect the core switch with the aggregation layer switches in the plant office building and central control building. The access layer switches in each plant area are connected to the aggregation layer switches via Gigabit Ethernet optical fiber; the access network adopts 100M to the desktop; servers are connected to the core switch at 1000M. TCP/IP protocol is adopted as the LAN transmission protocol. The computer network equipment room is located in the telecommunications equipment room of the plant office building.

3.2. The structured cabling system of this project adopts an integrated voice/data structure. Network connections between buildings (such as the general office building, central control room, and on-site equipment rooms) are implemented via single-mode optical cables, and the horizontal cabling adopts an advanced Category 6 cabling system. For rooms with LAN outlets in the buildings of this project, telephone wiring is also incorporated into the structured cabling system.

3.3. The information point configuration principle is as follows: each workstation in the office area or each 10m² work zone is provided with 2 information points, including 1 data point and 1 voice point; information outlets are also installed in analysis rooms, conference rooms, guard rooms, control rooms, and on-site equipment rooms.

4. Perimeter Intrusion Alarm and Video Surveillance System

4.1. Fiber Optic Sensing Vibration Detection System

4.2. Video Surveillance System

4.3. System Linkage

5. Telecommunications Cables and Lines

5.1. Telecommunications lines include telephone lines, computer network lines, public address/intercom system lines, automatic fire alarm lines, and television surveillance lines. The lines of each system form independent systems.

5.2. Administrative telephones and dispatch cables in the plant area adopt a shared-cable wiring method; trunk cables shall preferably use flame-retardant cables; the fire alarm system shall use flame-retardant and fire-resistant cables; the public address/intercom system shall use flame-retardant cables; the surveillance system cables shall use unshielded Category 6 network cables (optical cables) and power cables; 4-core single-mode optical fibers are used to connect to the regional fire alarm control panels or regional fire alarm panels; the LAN and television surveillance from the control room to each aggregation point are uniformly configured with single-mode optical fibers, and the LAN and television surveillance systems do not share the same network. Plant-area trunk cables or optical cables are laid in underground conduits; in the process unit area, they share cable trays with instrumentation, with partitions installed in the middle; where no instrumentation cable tray exists, independent cable trays, conduit, or direct burial shall be used. The fire alarm system outdoors shall be laid by direct burial.

6. Wireless Intercom System

6.1. This project deploys a plant-wide 4-carrier digital trunking system operating in the 400MHz band. The system adopts digital modulation, TDMA addressing, and divides 12.5kHz into 2 timeslots, which are used as 2 channels, with dynamic timeslot allocation across all channel units. The wireless communication system includes control center equipment, base station equipment, antenna/feedline equipment, handheld terminals, mobile radios, and fiber optic repeaters. The system uses intrinsically safe wireless two-way radios, whose explosion-proof rating shall be suitable for the highest explosion-proof requirement of the areas they may enter.

6.2. Equipment Used: RG2000 and other gateway devices are used to connect the wireless intercom and dispatch systems.

7. Public Address/Intercom System

7.1. Requirements: To ensure communication between the process unit areas and their respective control rooms, and between patrol personnel in the process unit areas, and to provide emergency broadcasting during emergencies, a plant-wide master-station public address/intercom system is deployed in each process unit area and patrol route, adopting a fully digital multifunctional industrial voice communication system. The public address/intercom telephone system shall have at least the following capabilities: 1. Single call, all call, group call, and emergency alarm from the master control call station; 2. Communication between the master control call station and all communication stations within the plant; 3. Communication between communication stations; 4. Compatibility with other communication systems through interfaces (such as the administrative telephone system, dispatch telephone system, and wireless trunking communication system); 5. Broadcast function; 6. Two-way communication, i.e., full-duplex communication; 7. Fire alarm linkage function. The production public address/intercom telephone system shall be networked with the fire alarm and control system, combustible gas leak alarm system, etc. When fire alarms, combustible gas leaks, or other incidents occur in production units, the production public address/intercom telephone system shall be used for incident information broadcasting. The production public address/intercom telephone system shall be able to accept broadcasts from the dispatch switchboard.

8. Production Dispatch Telephone System

8.1. Requirements: A digital production dispatch telephone switch with a capacity of 64 lines and expandable capability is planned for the plant. The dispatch telephone switch can be connected to the administrative telephone network, and the dispatch telephone system can interoperate with the wireless intercom system. The dispatch switch is installed in the telecommunications equipment room of the production office building, and the dispatch console is installed in the central control and quality control building. According to user management requirements, the plant adopts single-level dispatch, with the primary dispatch console installed in the central control and quality control building, and no sub-dispatch consoles are deployed.

8.2. Installation Locations: Dispatch telephones are mainly installed in control rooms, company leadership offices, guard rooms, each control room, fire station, main substation, regional (unit) power distribution rooms, and other positions related to production operations.

8.3. Equipment Used: The G3CP is used as the dispatch switch, sharing one device with the administrative telephone switch.

9. Administrative Telephone System

9.1. Requirements: The administrative telephone system shall rely on the local telecommunications operator. The local telecommunications operator is responsible for establishing a telephone module office within the plant, with related equipment placed in the telecommunications equipment room of the plant office building. The required access equipment and software upgrades are the responsibility of the local operator. A 100-pair main distribution frame for telephones is installed in the telecommunications equipment room, and all telephone users in the plant are routed from the main distribution frame to each voice distribution frame or telephone distribution box.

9.2. Installation Locations: Administrative telephones are mainly installed in control rooms, offices, substations, conference rooms, and other attended or regularly inspected positions throughout the plant. Central control room: 44 units; General solid waste warehouse: 2 units; Fire pump house: 2 units; Wastewater treatment area: 2 units; Hazardous waste warehouse: 2 units; Special tool warehouse and air compressor room: 2 units; Production office building: 50 units; Guard room 1: 2 units; Guard room 2: 2 units. A total of approximately 108 telephone lines is currently estimated.

9.3. Equipment Used: The G3CP is used as the program-controlled switch, connecting upward to the operator via digital trunk lines, and connecting downward to administrative telephones via telephone cards and telephone distribution wiring.