1、 Basic description

1. Three sets of dry flue gas purification systems for 3 sets of 36 rooms, 8 material boxes, and 9 fire path roasting furnaces, with one set per set, for a total of three sets.

2. Each system includes a flue gas cooling spray tower, AI2O3 dry adsorption dust removal system, connecting pipelines and related accessories, and automatic control system.

3. Responsible for design, installation, and debugging.

4. The purification system is arranged within a 70 meter long plane.

2、 Technical parameters of roasting furnace and existing smoke exhaust system:

1. Smoke volume: 90000 NM3/h

2. Negative pressure at the outlet: 3500Pa

3. Outlet flue gas temperature: ≤ 250℃

4. Smoke composition: (mg/Nm3)

Dust content: 250(mg/Nm3)

SO2 500(mg/Nm3)

Fluoride 50-80 (mg/Nm3)

Asphalt smoke tar 200 (mg/Nm3)

3、 Natural environment

1. Annual average temperature 13-17 ℃

2. The highest temperature over the years is 38.5 ℃

3. The lowest temperature over the years is -20 ℃

4. Average air pressure 1017 mbar

5. Average humidity 50%

4、 Installation location and smoke emission indicators

1. Outdoor

2. The purification efficiency of flue gas reaches over 95%. If the requirement is lower than the current national standards, it shall be implemented in accordance with the current national standards. national standard; F＜3.0mg/Nm3， Tar ≤ 20 mg/Nm3, dust<30 mg/Nm3, SO2 ≦200 mg/Nm3 。

5、 Technical requirements for cooling tower

1. The flue gas from the roasting furnace will be cooled to 90 ± 5 ℃ by a spray cooling tower and enter the bag filter. Manholes are left at relevant locations of the main pipeline for easy maintenance and cleaning by personnel

2. The spray cooling tower has functions such as pre dust removal, spray cooling, SO2 purification, temperature regulation, and large water fire extinguishing when the flue gas temperature exceeds the set value or when the flue gas of the roasting furnace catches fire.

6、 Specific requirements for cooling towers

1. Require the wall thickness of the steel flue roll pipe to be δ=6mm.

2. The cooling tower has a height of H=25 meters and a steel plate wall thickness of δ=8mm. The bottom conical funnel can remove pollutants such as dust and tar.

3. The spray gun and valve rack in the cooling tower are products of American spray Company or European PNR,

4. The first party shall provide 2 sets of DWH80 horizontal single-stage chemical pumps for each system, with a power of 22KW, a flow rate of 50 cubic meters, and a head of 80 meters.

5. All electric insulated butterfly valves require external insulation treatment, with a valve body inner and outer wall thickness of δ=8mm.

6. The water, air, and steam pipes used in the system shall be installed by Party B. The connection location and pipeline direction shall be designated by Party A. The insulation treatment of water and steam pipelines shall be carried out by Party B. The accessory stairs, protective barriers, etc. of the spray cooling tower shall be supplied and installed by Party B.

7、 Requirements for dry purification system:

1. The dry purification system includes all equipment and pipelines from the reactor to the fan, mainly including the reactor, dust collector, fresh alumina silo, fluorine-containing alumina silo, alumina conveying chute, pneumatic elevator, high-pressure fan for the chute, electric insulation valve, car feeding device, all smoke and dust pipelines, and the automatic control instruments of the above equipment.

2. The connecting cables (power and control cables) from the low-voltage cabinet to the on-site electric valve distribution box shall be provided and installed by Party B.

3. The second party shall provide the first party with detailed functional descriptions of control equipment such as sprinkler systems and electric valves, electrical control schematics, equipment capacity lists, total system loads, and other relevant electrical, self-control, instrumentation, and process information.

8、 Specific requirements for the dry process:

1. Use two bag compartments. The pulse valve of the dust collector adopts Australian plateau products.

2. The bag adopts a high temperature resistance of over 120 ℃, and the thickness of the dry process box shell is δ=4mm.

3. The top of the dry purification system should be equipped with a closed rainproof shed. The top of the dry dust collector should have sufficient strength and space, be sturdy and durable, and withstand a level 12 typhoon. It should be easy to replace the bag and take it out. The rain shelter adopts blue color steel tiles with a δ=0.8mm thickness. The auxiliary facilities of the dry air purifier, such as stairs and fences, shall be provided by Party B. And equipped with a 1-ton electric hoist for maintenance.

4. The water, air, and steam pipes used in the system shall be installed by Party B. The connection location and pipeline direction shall be designated by Party A. The insulation treatment of water and steam pipelines shall be carried out by Party B. The pressure and temperature primary instruments for water, air, steam, etc. used in the area of Party B shall be provided, installed, and debugged by the manufacturer of Party B.

5. The fresh alumina silo and fluorine-loaded alumina silo have a capacity of 100m3 and are equipped with radar level gauges. The thickness of the steel plate is δ=6mm. The lower part of the silo platform is a channel for alumina tanker trucks, which is 5 meters wide, 4 meters high, and 10 meters long, facilitating the unloading and entry and exit of alumina tanker trucks.

6. The alumina indicators used in the dry process system are as follows:

Granularity:- 45um<12%

+75um<53%

+150um<0.5%

Bulk density: 1.0-1.1 (g/cm3)

The use of this alumina must achieve a purification effect.

7. All valves in the flue gas pipeline of the system are electric insulated valves. The thickness of the inner and outer walls of the valve body is δ=8mm.

8. The compressed air storage tank shall be purchased by Party B.

9、 Electrical self-control part

System control requirements: The control system must achieve the following five purification operation states:

(1) When the flue catches fire or the outlet flue gas temperature of the roasting furnace exceeds the maximum set value. Automatically close all inlet and outlet valves of the purification equipment, and discharge the flue gas directly through the chimney through the auxiliary flue. At the same time, the safety valve at the outlet of the roasting furnace will automatically open, and the automatic protection device in the cooling tower will automatically start.

(2) Neither through the secondary flue nor the purification device, but through the fan channel.

(3) Dry purification uses a separate channel.

10、 On site environment

The equipment is installed and operated in indoor and outdoor environments with high levels of dust. Dust has certain abrasion and conductivity.

11、 Power supply conditions

1. High voltage AC 10kV, 50Hz

2. Low voltage AC 380V, 3-PH, 50Hz

AC 220V, single phase, 50Hz

3. Lighting AC 220V, single phase, 50Hz

4. Signal light, alarm AC 220V, single phase, 50Hz

5. Electromagnetic valve DC 24V, AC 220V, single phase, 50Hz

12、 Requirements for Electrical Control System (Configuration of Each Automatic Control System)

The self-control equipment should have a complete control system. The electrical distribution and automatic control system should be provided together with the equipment. The equipment should have both automatic and manual operation modes and a local control box or cabinet. The protection level of on-site panels, boxes, and cabinets is IP54. All control boxes and cabinets have operation, fault, and stop signals. The panels, boxes, and cabinets in the on-site control box or control room are made according to national standards and equipped with digital display indicating instruments and indicator lights. The second party is responsible for all installation and debugging work.

1. The PLC controller adopts the AB Logix5000 series from the United States, and the system reserves an independent ControlNet interface to automatically control the entire equipment and its auxiliary systems. It also has an independent Ethernet interface to achieve communication with the entire plant computer network. At the same time, it is equipped with an upper computer and a liquid crystal display for configuration and monitoring, and the equipment manufacturer provides the above equipment.

2. Each PLC controller should have sufficient digital and analog I/O modules. The input and output of the I/O module should be equipped with isolation relays, which should be able to meet all process control, measurement, and display requirements with a reserved 10%.

3. The PLC controller CPU should have sufficient computing power, with a maximum load rate of ≤ 60%, and blind plates should be added to the empty slots.

4. The communication capability of the PLC controller should have sufficient margin, and under the most unfavorable conditions, its communication load rate should be ≤ 20%.

5. Each PLC controller should be able to complete the interlocking control, process monitoring, recording, accident alarm, safety protection, etc. of the entire equipment.

6. All electrical equipment for dry purification is provided by the manufacturer, including complete sets of high and low voltage distribution cabinets, transformers, automatic control cabinets, control cabinets, and on-site control boxes. The specific cables, cable trays, lighting fixtures, etc. inside the equipment shall be designed, provided, and installed by Party B.

7. Industrial control computer: selected from Advantech's latest products, with a dual core CPU of 2.6GB, 1GB of memory, 160GB of hard disk, 16 × DVD (not limited to this configuration), ensuring storage of more than 3 months of historical records and main equipment operation records, equipped with network interfaces, 21 inch color LCD display, Lenovo brand. The backup time of UPS power supply shall not be less than half an hour, and Jinan Shante shall be selected. Each system is equipped with an HP laser printer.

8. The main low-voltage electrical components are Schneider products (such as circuit breakers, AC contactors, thermal relays, etc.). The low-voltage distribution cabinet adopts a drawer type and dual power supply. All distribution systems require the use of digital instruments and meters from Baoding U-Net.

9. The pressure transmitter (PMP71 series), differential pressure transmitter (PMD75 series), water pressure and flow instruments are selected from German E+H products (instruments with on-site display). The negative pressure and temperature at the flue gas inlet are detected using a three check two detection method. The resistance and thermocouple for flame detection at two points and temperature detection need to be armored (domestic famous brand products).

The detection points include: internal temperature detection, inlet and outlet temperature, open flame detection, negative pressure detection, fan inlet temperature and negative pressure, bag chamber differential pressure detection, bag leakage detection switch, etc. All detection instruments that are not mentioned but related to safety are provided by the equipment manufacturer.

Microwave interruption detection switch: Thermo DTR131Z 220V 4-20MA，

Water cut-off switch: FCS-G1/2A4P-VRX/230VAC 4-20MA。

Smoke and dust content detector: It is recommended to use PCME DS30a from the United States for leak detection

Smoke flow detector: It is recommended to use a tower shaped flowmeter with a temperature compensation circuit.

The selected instrument accuracy cannot be lower than the above instruments, and the protection level of the instrument is required to be no less than IP65.

10. The spray cooling equipment equipped with the spray cooling tower must be provided by Party B as a complete set,

11. The connection and cables used for all instruments, electrical equipment control boxes, and automatic control cabinets shall be completed by Party B.

12. All attachments and accessories not mentioned above shall be selected from domestic and foreign famous brand products.

13、 Data requirements

The necessary text files should be provided in Word. doc format; The necessary drawing files should be provided in AutoCAD. dwg format.

1. The text should include but not be limited to the following content:

1) Equipment description, including operating principle, specifications, technical indicators, power consumption, weight, equipment process and control, etc.

2) Supply scope (including spare parts).

3) Product quality standards.

4) Design and manufacturing standards.

5) External resource consumption, list of vulnerable parts, and replacement frequency.

6) External dimensions; The guaranteed space required for normal operation; Maintenance space; Maintenance cycle and maintenance time.

7) Main electrical equipment and material list, as well as their capacitance.

8) Distribution system and power requirements. The selection of various components, accessories, assemblies, enclosures, and cabinets should comply with IEC international standards and fully consider environmental factors

9) Provide the model, number of cores, specifications, terminal wire numbers, etc. of power cables and control cables for electrical equipment and control systems.

10) List of PLC controller information points.

11) PLC control software and software authorization.

12) PLC controller status data and test parameter table.

13) PLC controller programming manual.

14) Installation, operation, maintenance, and commissioning manuals for electrical and control systems.

15) Communication protocol.

16) Maintenance and repair guide.

17) Start the process.

18) Operation manual.

19) User manual.

20) Provide Chinese drawings, manuals, certificates of conformity, and other relevant materials for purchased equipment.

2. The drawings shall include but not limited to the following contents:

1) Equipment configuration diagram and main dimensions.

2) Electrical component layout diagram, wiring diagram, control schematic diagram.

3) The external dimensions of the control cabinet, the foundation installation diagram, including load and environmental requirements, as well as the location and dimensions of cable entrances and exits.

4) Hardware configuration of PLC control system.

5) I/O interface of PLC controller.

6) Electrical control diagram and ladder diagram of PLC controller (with Chinese annotations required).