Round Shape Vacuum Power Transformer Drying Oven 3200x4000

Variable pressure vacuum drying equipment

 

 

 

 

 

 

The variable pressure vacuum drying equipment is developed by our company based on the principle of variable pressure drying proposed by German experts, and combined with our company's experience in the design and manufacturing of vacuum drying equipment. This equipment is mainly used for drying the body of oil immersed transformers and transformers, reducing the drying time by about 30-45% compared to conventional vacuum drying. It is a reliable, efficient and energy-saving process equipment.

 

1, The main purpose of the equipment

This equipment is used for the drying treatment of transformers or other electrical products with a voltage level of 35KV and below, and a single unit capacity of 16000KVA and below. Party B guarantees the process and quality requirements of the product treatment, and provides process treatment plans and related control procedures for two voltage levels of 35KV and 10KV.

 

2, Main technical characteristics of the equipment

1) Having a reasonable vacuum system design, sufficient condensate is discharged from the condenser to effectively avoid contamination of the vacuum pump by moisture during the drying process.

2) During the heating process, according to different body temperatures, multiple automatic pressure alternations are carried out to periodically reduce the pressure inside the vacuum tank to a certain value, creating the most suitable conditions for the evaporation of water in the insulation of the body, and keeping the evaporation process of water in the drying process in a reasonable state.

3 )The drying treatment effect of the equipment on transformer products is good, and compared with traditional hot air drying equipment, it saves more than 30% energy.

4 ) The equipment has been adjusted through the variable pressure drying process, which can effectively solve the problem of rust formation in the iron core during the drying process.

5 )The automation level of the equipment and the level of product processing technology can both reach the advanced level in China, and the quality of the processed products can reach the level of first-class products in the industry

 

3, Technical Proposal

1. Equipment composition

1.1. One set of vacuum drying tank system

1.2. One set of electric door opening system

1.3. One set of electric trolley system

1.4. One set of vacuum system

1.5. One set of low-temperature condensation system

1.6. One set of heating system

1.7 A set of cooling water pipeline system

1.8 One set of pneumatic Plumbing

1.9. One set of control system

2. Equipment power, water, gas source, and basic conditions requirements (provided by the user)

2.1. Rated power: 110kW, 380V, 50Hz, three-phase five wire dedicated distribution cabinet, with power connected to the electrical control cabinet.

2.2. Water source: Pressure>0.1MPa, maximum consumption>3m3/h, water temperature ≤ 25 ℃.

2.3. Compressed air: 0.4~0.6MPa, with a compressed air consumption of approximately 0.3m3/min.

2.4. Equipment footprint: approximately 7000 × 8500mm.

3. Technical conditions of each system

3.1. One set of vacuum drying tank system

Technical indicators:

Tank size Ф 3200× 4000mm, horizontally placed on the ground, with the track inside the tank flush with the ground. The side moving electric door is opened, and when the tank door is closed in place, it is pneumatically locked; The direction of opening the door is to face the tank door and move it electrically to the right side to open.

Extreme vacuum degree (no-load, cold state) ≤ 10Pa, leakage rate (no-load, cold state) ≤ 100Pa · L/S.The tank is heated by a row of Negage pipes. The heat transfer oil is used as the heat transfer medium. The area of the heated row pipes meets the process requirements of the variable pressure method. The heated row pipes are made of seamless steel pipes and arranged on four sides (both sides, bottom and back).

The working temperature is 115 ± 5 ℃, with automatic temperature control. The tank is equipped with three temperature sensors to measure the temperature of the space inside the tank, the temperature of the body, and the insulation material.

The flange sealing ring of the tank body is a high-temperature and oil-resistant sealing ring.

The tank is equipped with a work trolley, with a load capacity of 30T and a size of 2200mmX4000mm.

Rock wool insulation, stainless steel (SUS430) sheet armor

Configuration list:

1 set of vacuum tank body

1 set of door opening mechanism

4 sets of discharge pipes inside the tank

1 set of work trolley

1 set of tank door sealing ring

3 sets of temperature sensors

1 set of track inside the tank

1 set of stainless steel insulation armor

3.2. One set of electric door opening system

3.2.1. The electric side movement of the tank door opens the door, the cylinder is locked, and the travel switches of each action are interlocked for protection.

3.2.2. Consisting of a tank door transverse gantry, a drive reducer, and a transmission mechanism

Door electric open

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.3 One set of electric trolley system

3.3.1 Electric traction vehicle, motor direct reduction gear, drag mechanism

3.3.2 Load bearing: 30 tons

3.3.3. Overall dimensions of work trolley: 4000 × 2200 (long × Wide)

Electric trolley

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.4. One set of vacuum system (three sets)

3.4.1. The vacuum system is configured with SV-300B+SV-300B (Leybold pump)/ZJP-600, with a total of three vacuum pumps and a maximum pumping speed of 600L/S. The vacuum system (including pumps and valves) operates sequentially and automatically.

3.4.2. The system is equipped with a highly reliable vacuum transformer valve group, electromagnetic vacuum relief valve, manual relief valve, vacuum sensor, vacuum pipeline, and corresponding accessories. The variable pressure valve group includes DN100 pneumatic valve, DN50 electric valve, and thin film vacuum sensor (a key component of the variable pressure process).

3.4.3. The gas extracted from the tank is cooled and dehydrated by the condenser

3.5. One set of low-temperature condensation system

3.5.1. One new horizontal structure condenser, which can quickly and effectively condense gas and moisture from the tank, and has an automatic drainage device that does not damage the vacuum.

3.5.2. The effective condensation area of the condenser meets the process requirements, and the internal material is made of stainless steel pipes.

3.5.3. Configure one set of 4P integrated low-temperature water chiller to provide low-temperature water below 10 ℃, ensuring good condensation effect of the condenser

 

Vacuum drying vacuum unit
Vacuum unit+condenser	German Leybold vacuum pump SV-300B

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3.6 Heating system

3.6.1. Heating center heating, heating power 74kW (heating body 72KW, high-temperature oil pump 2KW). As a heat transfer medium, the system consists of a heating body, a high-temperature oil delivery pump, a filter, a temperature sensor, a high-temperature valve, a pressure gauge, an expansion tank, etc.

3.6.2. Automatic control of heating center, over temperature alarm, maximum heating temperature of 130 ℃, temperature control accuracy of ± 5 ℃

 

3.7 Measurement and Control System (Touch Screen)

3.7.1. Integrated fully enclosed electrical control cabinet with full system touch screen control, convenient for observing and controlling the working status.

3.72 The Mnemonic major system of the whole set of equipment is automatic control, temperature control, and the vacuum pump startup has interlocking protection function.

3.7.3. The temperature digital display of each point in the tank is intuitive and reliable.

3.7.4. Vacuum measurement uses resistance vacuum gauges and vacuum sensors.

3.7.5. The main process operating system is implemented by Mitsubishi.

3.7.6 End point judgment: Based on the partial pressure of water vapor in the tank, the end point judgment is automatically performed for the entire process according to the requirements of the variable pressure method.

3.7.7. The complete set of variable pressure drying process is provided by our company.

3.7.8. Interlocking and interlocking between various control circuits.

3.7.9. Under water and under voltage (air) protection.

3.7.10. The entire system ensures reliable operation under the production environment conditions of Party A

3.8 Cooling water system

3.8.1. It is used to provide cooling water to the vacuum condenser and vacuum pump, consisting of an electric contact pressure gauge, valve, and pipeline.

3.8.2 If the cooling water pressure is insufficient, an alarm will be issued.

3.8.3. The inlet and outlet water of this system is connected to the public circulating water system of Party A on site

3.9 Compressed Air System

User provided compressed air source (0.3m3/min)

The system consists of corresponding pneumatic triplets, pressure gauges, pipelines, valves, and pipelines

4.0 Other technical requirements

4.1. All surfaces of components in the vacuum system that come into contact with the extracted gas (excluding pumps and valves) shall be derusted and treated with rust prevention.

4.2 Each system and pipeline have different color markings on the surface

 

4, Price

No	Item	Details	Unit	quantity
1	Vacuum drying tank	1. The size of the horizontal tank body is Ф 3200 × 4000mm. 2. The side movement of the tank door opens the door with a pneumatic locking device 3. High temperature and oil resistant, long-life tank door sealing ring 4. Tank Negage manifold 5. Temperature sensor 6. Equipped with a work trolley inside the tank (with a capacity of 30 tons) 7. Release the vacuum valve (DN40) 8. Rock wool insulation, stainless steel sheet armor.	set set set set pcs set set set	1 4 1 4 3 1 1 1
2	Electric door opening	1. Electric side sliding door opening of tank door 2. Cylinder locking 3. Moving the gantry horizontally from the tank door 4. Drive reducer and transmission mechanism	set pcs set set	1 4 1 1
3	Electric trolley	1. Electric tractor 2. Trolley capacity: 30 tons 3. External dimensions of work trolley: 4000 × 2200 (long × Wide)	set set set	1 1 1
4	vacuum system	1. System configuration: SV-300B rotary vane pump (Leybold, Germany) ZJP-600 Roots Vacuum Pump 2. High precision pneumatic baffle valve (DN150) 3. Electric pneumatic inflation valve (DN25) 4. Corrugated shock absorber (DN100) (DN150) 5. Vacuum sensor and sensor base 6. Vacuum gauge and gauge holder 7. Vacuum diaphragm valve (DN10) 8. Front stage pump pneumatic butterfly valve (DN100) 9. Front stage pump outlet electromagnetic inflation valve (DN16) 10. Vacuum pipelines and corresponding accessories	set set set set set set set set set set set set	2 1 1 1 1 1 1 1 1 1 1 1
5	condensation system	1. New structure condenser 2. The condenser tube is made of seamless stainless steel tube	set set	1 1
6	Heating system	1. Heating center body (72kW) 2. High temperature thermal oil pump series 3. Oil filter (DN50) 4. High temperature valve (DN50) 5. High temperature oil expansion tank 6. Pressure gauge (Y-60) 7. Bimetal thermometer (0-200 ℃) 8. Seamless steel pipes and their accessories	set set set set set set set set	1 1 1 7 1 1 1 1
7	Measurement and Control system	1. Integrated electric control cabinet (provided by professional manufacturers) 2. Full system touch screen control 3. Japanese Mitsubishi Programmable Logic Device (FX Series) 4. Digital temperature controller (controlling oil temperature) 5. Digital temperature display instrument (displaying tank temperature, iron core, coil temperature) 6. Digital vacuum gauge 7. Vacuum sensor 8. Pressure swing drying process 9. Heating main circuit elements (Solid-state relay, radiator) 10. Low voltage components (relays, air switches, fuses) 11. Valve control unit 12. Temperature control unit 13. Main process control unit 14. Various protection alarm units	set set set set set set set set set set set set set set	1 1 1 1 3 1 1 1 1 1 1 1 1 1
8	COOLING WATER SYSTEM	1. Chiller 1 2. Cooling water pipeline 3. Valves 4. Electric contact pressure gauge 1	set set set set	1 1
9	COMPRESSED AIR SYSTEM	1. Triple piece 2. 2-position 5-way directional valve 3. Pressure gauge, pneumatic pipeline, valve and other accessories	set set set	1 1 1
10	Spare parts	1. Sealing rings for vacuum pipelines (various specifications) 2. Electric heating tube (8KW) 3. Rotary vacuum pump with accessories 4. Roots vacuum pump with accessories 5. Lighting observation window glass 6. Temperature measuring resistor 7. Vacuum sensor 8. Disk vacuum gauge 9. Pressure gauge	set set set set set set set set set	1 2 1 1 1 2 1 1 1

 

5,List of Key Supporting Parts

 

NO	Name	Details	Quantity	producer
1	vacuum pump	SV-300B ZJP-600	2 1	Leybold HXNG
2	Vacuum pipeline valve	Dn25～Dn50	pcs
3	Temperature controller	708 series	4	Yudian
4	Digital vacuum gauge		1	swip
5	Solid-state relay		1	Gute
7	High temperature thermal oil pump		1
8	Main electrical components		1	Schneider
9	Lighting observation window		1	shanghai
10	Tank door sealing ring		1	Our factory
11	Temperature sensor		4	Diligen
12	condenser	6 m2	1	Our factory
13	Chiller unit	4P	1	Our factory
14	heater	72KW	1	Our factory