In the urban development of China, the new population in the city continues to increase, and the scale of the city expands. Every day, cities will produce a lot of garbage-polluting cities. How urban waste is treated or becomes a problem that hampers urban development and urbanization. In addition, the urban garbage project requires the use of a large number of suction trucks. Since it has been put into the market, it has been favored by the energy departments at all levels and the majority of farmers, and has also promoted the development of the city. In addition to the use of suction trucks at all levels of the relevant energy sector and the sanitation department, individual operations make money and farmhouses clean up their own septic tanks, so some people call this sanitation suction truck as a household suction truck or a farm septic tank. Cars, also known as toilet suction vehicles, excrement vehicles. In the past two years, the sales of special suction trucks have become popular, and it is not the Urban Sanitation Department or the small agricultural households that lift the heads. The individuals who purchase the suction trucks at the most are the individual business sanitation cleaning teams. They have professional pumping truck fleets and general sewage suction. Sewer dredge service is one-stop. They have a wide range of jobs, good social relationships, so they may receive multiple jobs that look dirty and make money. Most of the people who buy a suction truck are going to talk about how to charge for such a job. Generally speaking, for a 2 to 5 tons, a car will invest 20,000 yuan, but the minimum charge for a can of manure is between 150 and 600 yuan, and the livelihoods are better at around 8 to 10 cans per day. We can carefully count their income. In addition, this is only the cost of pumping. If a row of farmers or fish ponds is to be excreted, it can be normal for one can to earn tens of thousands of dollars in accidents; Is the cost of the car, with a declaration of exemption, the additional cost of car do not have to pay, depends on how much you pay insurance costs, usually is in addition to point oil money, the rest is to make. The increase in national policy support and the gradual improvement of the external environment, especially as the state increases investment in the development of rural social undertakings, the supplier's suction truck industry is an expectation of an outbreak of demand, not only to help suppliers. The suction truck industry has come out of the doldrums, and it has also allowed some farmers to get out of poverty without buying some cheap suction trucks. As a result, rural areas and cities are more beautiful. The suction truck vacuum suction pump is widely used for suction, shipment, and discharge of sludge from sewage wells, inspection wells, sedimentation wells, and various types of canals, sludge from excrements, or petrochemical plant effluent pools. The dirt in the tank can be dumped directly through the rear cover, which has the advantages of greater suction force than the suction truck and wider application range. Suction truck maintenance is also relatively simple, in use, with the increase in mileage. All components are subject to wear, deformation fatigue, looseness, aging, and damage, resulting in deterioration of the vehicle's technical performance, impairing the drivability of the suction truck, deteriorating economic efficiency, and reducing safety and reliability. If, during use, the items of wear, looseness, contamination, and prone to faults are grouped together according to the conditions of use and wear of the vehicle, and lubrication, adjustment, inspection, tightening, and other maintenance operations are performed in stages and in stages, they can be Improve the working conditions of all parts, reduce wear and tear, eliminate hidden dangers, reduce transportation costs, ensure safe driving, and extend the service life of the suction truck. Therefore, vehicle maintenance should be based on the principles of prevention and mandatory maintenance, and maintain the cleanliness of the vehicle. To detect and eliminate faults and hidden dangers in time to prevent early damage to the vehicle. This will ensure that the tank is airtight and that the manure suction operation is performed in the best condition. Suction trucks can also be used in a single vehicle, not only for sucking large excrements but also to convert them into multi-purpose vehicles for use elsewhere. For example, we can use suction trucks to increase the function of water trucks. Suction trucks mainly consist of automobile chassis, tanks and suction equipment. The original 8-body tank of the suction truck was changed to two 4-way tanks. The water tank in front was oval, and the water pump, pipe network, fire hydrant, water inlet, front punch, and high position were installed below the tank. Showers and other functions. The manure trap tank body also uses an oval tank body, which is inclined upwards from a small point of view. A vacuum suction manure pump is installed below, and a manure inlet is arranged on the tank body, and a manure outlet is provided at the rear of the tank body. The whole suction truck has two sets of its own pipe network, which can be operated independently when manure and water are collected. The owner of the suction truck can be used to organize the septic tanks and sewers in the community, as well as beautify the spraying work, so that we are not only The inhalation of manure is used to attract manure, and it can also be used to transport water, making it more economical and applicable to use a suction truck. In addition, we can also convert it into a sewage truck, which is economical and affordable. Now people's lives are getting higher and higher, the quality of environmental protection has been promoted, rural excrement does not want to pick, the city wants to taste a small benefit is even higher, the special suction truck function is most suitable, multi-functional suction trucks buy back cleaning septic The pool does not have to use artificial rakes. It is of course good to buy back money in the form. Nowadays, with the development of science and technology, the level of urbanization is also getting higher and higher. The suction truck is not only used in rural areas but also can be used for the purchase of clean business for contracting environmental protection departments in cities, which greatly increases the efficiency and reduces the cost for urbanization. Building bricks and tiles. (Text / Kang Shaowu)
Characteristic and performance analysis of main parts of generator
Stator:
Stator consists of base, stator core and stator windings.
The base is welded by steel plate, the structure is light and sturdy, and the base is divided into many air inlet and outlet zones in the axial direction;
Stator coil:
It is stacked by strands of copper wire covered by polyester glass fiber, with half-unit type and basket shaped structure (parts of stator coils use transposition structure). The insulation grade of the stator coil is F grade. The stator coil is shaped by continuous wrapping and mould pressing with mica tapes. The coil end is firmly tied up to the support and the bundling ring with unidirectional tapes or dacron-glass ropes thus the turbo-generator unit became highly resistant towards sudden short-circuit conditions.
Stator core:
Stator core is punched and stacked by cold rolled non-oriented, high permeability, low loss high-quality silicon steel sheet, both sides of the silicon steel sheet are coated with a solid insulating film to prevent short-circuit between the stator core pieces to reduce eddy current loss.
Rotor:
The rotor is composed of shaft, coil, center ring, shroud ring and fan ring etc. The rotor coil is made of cold-drawn flat copper wires, and processed by oxygen-free annealing. The rotor coil of generator with 50MW and above is welded together by silver-bearing cold-drawn copper wires and adopts F grade insulation.
The shroud ring at rotor coil end is made of non-magnetic steel. Both ends of the rotor are equipped with centrifugal fan or axial flow fan with paddle fan blade which is forged by high-strength aluminum alloy.
Rotor machining:
The generator shaft is forged from an integral high-quality alloy steel and has an axial groove formed thereon for fitting a rotor coil and an air groove or a crescent groove is made in the large tooth to enhance the cooling of the main body and the coil end. The slots are processed by special machine for generator rotor processing, Tacchi high precision horizontal slotting and milling machine made in Italy, to ensure the high efficiency of generator.
The generator rotor must be subjected to high-speed dynamic balancing experiment and dynamic impedance experiment before delivery to verify the mechanical strength of the rotor and ensure excellent inter-turn insulation of the rotor windings.
(2)Model
Mainly produce the following model Steam Turbine Generator and the specifications are as follows:
Voltage(KV) Frequency(HZ) Power(MW)
2 poles Steam Turbine generator 6.3-3.8 50 3-60
6.6-13.8 60
4 poles steam turbine generator 0.4/0.69 6.3/6.6 10.5/11 50 0.5-30
0.4-11 60
QNP steam turbine generator uses closed-loop air self-circulation ventilation.
The rotors of turbo-generator under 50MW adopt indirect ventilation cooling method;
The rotors of 50MW and above turbo-generator is directly ventilated and cooled; an auxiliary groove is machined under the rotor winding trunking; air vents are machined on the rotor windings; with the action of the fan head and the centrifugal pressure head of the air vents, the rotor windings are directly cooled by air from the auxiliary groove and air vents.
(4)Excitation mode
QNP's steam turbine generator can adopt static silicon controlled type, two-pole AC brushless excitation and three-pole AC brushless excitation, three kinds of excitation mode.
(5)Insulation system
Adopt class F insulation materials and insulation structure, during the running time, assess the system according to class B insulation grade, meanwhile some margin has been kept.
(6)Design and acceptance criteria
Design, manufacture, inspection are carried out according to the relevant national standards, at the same time can meet the International Electrotechnical Commission IEC34-1 latest standards. According to customer`s requirements, QNP`s steam turbine generator can also be designed, manufactured and accepted according to ANSI, NEMA and other international standards.
(7)Technical Performance Analysis
1.Output margin
The series of steam turbine generator of QNP keeps 10% output margin.
2.Loss and efficiency
The steam turbine generator of QNP optimized the design and farthest minimized the additional loss and wind abrasion of generator under no-load and short-circuit condition, improved the efficiency of the generator, in general, QNP steam turbine generator`s efficiency is 0.2% higher than domestic similar models in this industry. It is higher than the national efficiency standard on the same capacity level. For example: QNP 15MW steam turbine generator`s efficiency value can reach 97.65%, and the national standard value is 97%.
3.Running reliability
QNP's steam turbine generator adopts advanced manufacturing technology, especially the rotor`s overspeed test uses high-speed dynamic balancer, rotor`s balance precision has been greatly improved, and the rotor`s vibration value is decreased. So that the steam turbine generator`s running availability factor has been improved, and the unit`s forced outage rate is decreased. At present, the availability factor of the steam turbine generator can reach about 99%, and the forced outage rate fell to 0.04% to 0.4%. Overhaul interval is up to 5 years. And the unit life can reach to 35 to 40 years.
Model meaning
QFWD-3-2A
QF Steam turbine generator
W W means brushless, without W means static silicon controlled
D D means double support, without B means single support
3 Rated power
2 2 means two poles and means the rated rotation speed is 3000 r/min
4 means four poles and means the rated rotation speed is 1500 r/min
A means the design serial number: A.B.C.D
Steam Turbine Generator,Biomass Generating,Biomass Generation,Biomass Power Generation Shandong Qingneng Power Co., Ltd. , https://www.steamturbine.be