This regulation applies to the design of automatic analyzer rooms in chemical plants. HG/T 20516-2000 Design regulations for automatic analyzer rooms (with clause explanation) HG/T20516-2000 Standard download decompression password: www.bzxz.net

Industry Standard of the People's Republic of China
Design Code for Analyzer Room
Design Code for Analyzer RoomHG/T20516-2000
Editor: Lanzhou Design Institute of Sinopec GroupApproval Department: State Bureau of Petroleum and Chemical IndustryImplementation Date: June 1, 2001National Chemical Engineering Construction Standard Editing Center (formerly the Engineering Construction Standard Editing Center of the Ministry of Chemical Industry) 2001 Beijing
1 General Provisions
This regulation applies to the design of automatic analyzer rooms for chemical plants. 1.0.1
When implementing this regulation, it shall also comply with the provisions of the relevant national standards in force. 1.0.2
2 Setting up the automatic analyzer room
2.0.1 Whether to set up the automatic analyzer room shall be determined based on the type, quantity, importance of application and environmental conditions of the analyzers used in the engineering design. The automatic analyzer room shall be set up in the following occasions. 1. Installation of non-explosion-proof automatic analyzers and their auxiliary equipment in places with explosion and fire hazards, and it is not convenient to use on-site analyzer boxes for sealing isolation, blowing and other protective measures; the installation site has harsh environmental conditions, and the analyzer is better protected; 2. To ensure the reliable, accurate and safe operation of the analyzer, the analyzer manufacturer requires the installation of an automatic analyzer room; 3. To meet the protection requirements for equipment and personnel during maintenance; 4. Multiple automatic analyzers are used in the adjacent parts of the process device, and the instrument has special requirements for the installation site. 5. The automatic analyzer room should be set up independently. The process device uses a large number of analytical instruments, and the process units are at a certain distance from each other. It is advisable to set up several automatic analyzer rooms according to the process units. 332
Location selection
The automatic analyzer room should be set up in a non-explosion-hazardous place and should not be set up in a 0-zone place. If it needs to be set up in an explosion-hazardous place, corresponding explosion-proof measures must be taken. 3.0.2 The location selection of the automatic analyzer room should minimize the distance from the analyzer to the sampling point and the connection length with public works (such as air, steam, electricity, etc.): At the same time, it should be convenient for the transportation of the overall hoisting cylinder of the metal structure automatic analyzer room and the entry and exit of maintenance personnel. It should avoid places with continuous vibration sources and strong continuous electromagnetic interference. 3.0.3
Structure and layout
Structural requirements
According to the instrument investment and general layout, the automatic analyzer room can choose a metal structure or a brick structure.
The automatic analyzer room should be fireproof and rainproof. 4.1.3
Automatic analyzer room with brick structure
Wall: Appropriate materials should be used to meet relevant structural and safety requirements. 1
2Floor: The indoor floor elevation should be at least 200mm higher than the outdoor floor elevation: The floor should be non-slip and anti-seepage, and acid and alkali resistant floors should be used when necessary.
3Door: It should open outwards and have an automatic door closing structure and an emergency push rod; when the automatic analyzer room is larger than 4m×4m, a main door and a safety door should be provided.
4Window: It is advisable to use closed fixed windows.
5Clear height: It is advisable to be 2.7~3m.
4.1.4 Metal structure automatic analyzer room
1 Base: It should be an I-beam slide type. The base and frame should be metal structures. They should have sufficient strength to ensure that they will not deform during dragging, lifting, loading and unloading, and should be installed on a concrete foundation; 2 Walls: They can be made of galvanized steel plates with a thickness of 1~2mm. It is advisable to use component embedding. Glass wool or polyurethane should be filled between the outer wall and the inner wall, and the thickness should not be less than 75mm; 3 Floor: Anti-slip metal plates can be used as needed, and sealing measures should be taken; 4 Doors: They should open outwards and have automatic door closing structures and emergency push rods. They can be made of galvanized steel plates with a thickness of 1~2mm, and observation windows should be provided on the doors;
5 Net height: It should be 2.0~2.8m;
6 A lifting ring should be provided for overall lifting.
The metal structure of the automatic analyzer should adopt corresponding anti-corrosion measures according to the needs of the on-site environment. 4.1.5
The doors and windows of the automatic analyzer room located in explosion-hazardous areas shall be made of explosion-proof safety glass. 334
4.2 Layout principles
The area of ​​the automatic analyzer room shall be determined according to the number and type of analytical instruments and the size of auxiliary equipment. The layout of analytical instruments, auxiliary equipment and ventilation systems in the automatic analyzer room shall avoid the accumulation of flammable substances.
Analytical instruments shall be installed on independent racks or instrument panels, which shall be fixed on the ground or mounted on the wall, and sufficient maintenance space shall be left. 4.2.3
The sampling system should be arranged outside the automatic analyzer room, and the fast loop of the analyzer should be arranged on the wall outside the automatic analyzer room; the length of pipelines, the number of connectors and other parts that may leak flammable substances in the automatic analyzer room shall be minimized.
4.2.5 The carrier gas and standard gas (zero point and span gas) cylinders required by the analyzer should be installed on the outdoor wall and covered by a rainproof awning.
Manual analysis sampling points should not be set up in the automatic analyzer room. 4.2.6
Fire extinguishers should be installed in the automatic analyzer room. 4.2.7
4.2.8The layout and installation of equipment, pipelines, etc. in the metal structure automatic analyzer room should be provided as a complete set by the automatic analyzer room manufacturer.
5 Lighting
Lighting lamps and emergency lighting lamps should be installed in the automatic analyzer room. The illumination should not be less than 2001x. Local lighting should be added to the parts that need frequent inspection and maintenance. The lighting switch should be installed on the outer wall of the door.
Heating and ventilation explosion-proof
Basic principles
In order to meet the requirements of environmental control, corrosion prevention, explosion prevention, equipment and personnel safety, heating and ventilation systems can be set up. 6.1.1
6.1.2 The temperature in the automatic analyzer room should be kept within the range of 10~30℃. According to the requirements of the maintenance of the analyzer, a heating system can be set up.
When general heating and ventilation cannot meet the analyzer's requirements for temperature and humidity, an air conditioning system should be used. 6.1.3
The ventilation of the automatic analyzer room should ensure that there is enough clean air to dilute any leaked combustible substances to a concentration below 25% of the lower explosion limit (LEL). 6.1.5 The number of air changes for artificial ventilation should not be less than 5 times per hour. The air in the fan intake should be taken from a non-hazardous place and should be clean and non-hazardous: However, if the electrical equipment in the automatic analyzer room can meet the requirements of Zone 2 or above, the air in the intake can also be taken from Zone 2.
Automatic analyzer rooms installed in explosion-hazardous areas or measuring flammable and explosive gas analyzers shall be equipped with 6.1.7
combustible gas detection alarms; automatic analyzer rooms measuring toxic gas analyzers shall be equipped with toxic gas detection alarms.
6.2 Analyzer rooms in non-explosion-proof areas
Automatic analyzer rooms located in non-explosion-hazardous areas shall be mechanically ventilated. 6.2.1
6.3 Analyzer rooms in explosion-proof areas
6.3.1 The classification of explosion-hazardous areas in automatic analyzer rooms shall fully consider the possibility of leakage of media from system pipelines and various pipe valves.
Lighting fixtures and electrical equipment shall be explosion-proof. When the analyzer and other electrical equipment can meet the corresponding explosion-proof requirements, the automatic analyzer room may be mechanically ventilated.
When the analytical instrument cannot meet the corresponding explosion-proof requirements and local explosion-proof treatment cannot be performed, the automatic analyzer room should adopt positive pressure ventilation. The positive pressure ventilation system should meet the following requirements: When all openings (doors, windows, etc.) are closed, the indoor pressure should be maintained at no less than 25Pa; 2
When all openings are opened, the air flow rate through the openings should not be less than 0.3m/s; When a positive pressure ventilation system fails, an alarm should be issued or an interlocking device should be activated: The explosion-proof level of the electrical equipment of the ventilation system should meet the location division under the condition of ventilation system failure, etc. The power supply of the positive pressure ventilation system should be set independently. If necessary, flow limiters and emergency cut-off devices should be installed on the sampling pipeline or return pipeline outside the analyzer room. 6.3.5
6.3.6 The alarm part of the combustible gas detection alarm should be installed in the control room. At the same time, there should be a signal display in the automatic analyzer room and on the outer wall of the door top. When the combustible gas concentration reaches 25% of the lower explosion limit (LEL), an alarm will be issued; when it reaches 50% of the lower explosion limit (LEL), the power supply of non-explosion-proof electrical equipment in the automatic analyzer room will be cut off.
Public Engineering
The automatic analyzer room can be equipped with water supply and drainage, and domestic water is used. According to the needs of the analytical instrument, a circulating 7.0.1
Circulating water, cooling water or deionized water.
7.0.2The load level and quality of the power supply of the analyzer shall meet the requirements of the analyzer. The ventilator should be connected to the emergency power supply. bZxz.net
7.0.3The driving and protective gas of the analyzer shall be instrument air. 7.0.4
When steam is required, low-pressure steam of 0.3~1.0MPa can be used. 339
Discharge of samples
8.0.1The gas, steam or liquid discharged from the analyzer shall not cause danger to the analyzer room or the surrounding environment. 8.0.2 If the residual gas of various samples discharged by the analytical instrument cannot be economically sent back to the process system, it should be discharged to a safe place. If the residual gas is not dangerous after mixing with the public venting system, and the back pressure fluctuation of the discharge system after mixing will not cause the measurement error of the instrument, it can be connected to a public venting system, otherwise it should be vented separately; the diameter of the venting pipe should not be less than DN40; if the sample residual gas is a flammable gas, a flame arrester should be added to the venting pipe. 8.0.3 Liquid samples should be discharged to the recovery system or the public discharge system. 340
Laying of pipelines and cables
9.0.1 The laying of sampling pipelines, venting pipelines, instrument air or chlorine pipelines, and wires and cables shall comply with the provisions of the "Instrument Piping and Wiring Design Regulations" (HG/T20512). 9.0.2
The grounding of the automatic analyzer room shall comply with the provisions of the "Instrument System Grounding Design Regulations" (HG/T20513). All material pipelines entering and leaving the automatic analyzer room should be connected by high-quality plate-through joints; public engineering material or sewage and vent pipelines should be connected by flanges.
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