Hi-Temperature & Hi-Pressure/ Hi-Temperature & Ultra-High Pressure Back-Pressure Type Steam Turbine Unit

• Generator Type: Synchronous Generator
• Output Type: AC Three Phase
• Standard: Standard
• Transport Package: Steal Pallet
• Specification: As specifications
• Trademark: Huayang
• Model NO.: B-hi
• Origin: Zibo
• HS Code: 8406820000
• Production Capacity: 60 to 100 Set Per Year

Product Description

RODUCT DESCRIPTION

Steam turbine is a kind of power equipment that converts steam heat energy into rotary mechanical energy. It is most commonly used to drive generators to generate electricity and can also replace electric motors to directly drive pumps, fans, compressors and other shaft rotating equipment.

According to the thermodynamic system, steam turbines are mainly divided into backpressure type, condensing type, extraction condensing type, extraction backpressure type, etc.
According to the rating of inlet steam parameter, the steam turbine also canbe divided into hi-temperature & hi-pressure or hi-temperature & ultra-high pressure type, medium temperature & medium-pressure type, low parameter inlet steam type.

The backpressure/extraction backpressure type steam turbine has the relatively simple thermodynamic system, there is no phase change of steam turbine exhaust steam in the system and will trans to the next heat exchange process directly by pipeline, it is the core equipment in high-efficiency cogeneration projects. In other words, these two kinds of steam turbine generator unit are the device that uses the pressure difference between the boiler and the heat supply to do power generation. It has met the heat supply demand as the primary function, and power generation exists as an auxiliary energy-saving function.

These two types of steam turbine are widely use in industries included paper mills, sugar mills, printing and dyeing mills, chemical industry, petrochemical industry, food stuff industry, etc. that need a lot of heat energy consumption.

OUR TECHNICAL ADVANTAGE

High Efficiency Ratio - The steam turbine mostly designed to multi-stage small enthalpy drop impulse type, generally have 2 to 4 stages more than traditional design models: this design arranged more stage and reduced the distance between each flow stage by adjusting the distribution of enthalpy drop, by decreased impeller diameter and increased blade height in each stage of steam turbine to reduce the interstage losses; also optimized the design of the blades, nozzles, and diaphragm nozzles profile, effectively reducing the frictional heat loss of the steam turbine, thereby improving the thermal-mechanical conversion efficiency (internal efficiency) of the steam turbine. The actual operating steam consumption rate is relatively lower, and the internal efficiency is at least 5-10% higher than traditional design models.

Wide Governing Range - The governing stage of steam turbine adopted a step-by-step regulation method to make the inlet regulation range of steam turbine more widely, and more suitable for variable operating conditions and overload operation of steam turbine.

Lower Vibration Value and Noise Level - The final rotor assembly of the steam turbine is a rigid solidly forged with CNC precision machining rotor. Compared with traditional flexible assembly rotors, the operating vibration value & failure rate of our products are significantly lower than other manufacturers' traditional models. The vibration value of the bearing pads of our units that have been put into operation are all within 0.02mm, and noise under 80dB by 1 meter distance away from the unit.

Less Steam Leakage- The steam chest & casings of the steam turbine are integrally cast and formed, the structure optimized design as horizontal split overall spherical structure is more reasonable and compact, with uniform thermal expansion and less deformation that cannot cause steam leakage on the horizontal split of the casings; The shaft gland seal system adopts axial flow labyrinth type with expansion compensation device, combined with the patented design of a reverse pressure steam seal compensation device, which has advantage of low friction on the main shaft, and steam leakage during operation have reducted more than 50% compared to traditional models, it greatly improving the safety and economy of unit operation.

More Safety & Sensitive For Governing System - Digital Electro-hydraulic Control governing (DEH) and emergency trip system (ETS) adopted separate high-pressure wear-resistant (flame resistant) oil supply system (EH), it has the characteristics of sensitive response, good stability, and low failure rate. Compared to regulation and crisis security system with low-pressure lube-oil supply, the actuator has high pulling force with high adjustment accuracy and is not easy to jamming, ETS has fast emergency trip response speed, this application eliminates the hidden failures of control hydraulic oil system caused by water emulsification and deterioration in the shared lubricating oil system.

Quickly Start-up - The high-temperature high-pressure and high-temperature ultra-high-pressure units adopt casing sleeve design of high-pressure inner casing and outer casing, this application can adapt thermal expansion of casing under startup, shutdown, and variable operating conditions, so the warm-up speed of the unit is fast, and the startup time can be reduced by more than one-third compared to traditional single casing models, greatly reducing the steam consumption during the startup of the steam turbine, thus reducing the operating cost of the unit.

Low cost of construction and operation - Due to compact structure, modular design, and small volume weight, the unit also has advantage of convenient installation and maintenance with low cost on construction & operation.
 

TECHNICAL FEATURES

Capacity: 3MW to 50MW

Inlet steam pressure: 8.83MPa-a to 13.24MPa-a; Inlet steam temperature: 510 to 535Deg.C;

Back pressure: 0.294MPa-a to 6.7MPa-a

Supporting Steam Boiler Parameters: 9.8MPa-a to 13.7MPa-a; 510 to 540Deg.C

Construction: Single flow, multi-stage solid rotor, horizontal spindle, two bearings

Double Sleeve Cylinder Design: High-pressure inner cylinder mounted in outer cylinder

Rated Rotating Speed: 3000rpm direct coupling to generator ; 6500 or 7500/3000rpm (Special specifications)

Vibration VALUE: rated speed≤0.03mm ; critical speed≤0.15mm

Governing System (DEH+EH): Speed swing value: ≤15rpm; Speed governing droop: 4.5±0.5%; Speed regulation delay rate: ≤0.5%; Droop of exhaust pressure: 10%; Exhaust pressure delay rate: ≤2%

Emergency Trip (ETS): Overspeed: 110% ~112% of rated speed@mechanical device, 105% ~106% of rated speed@electrical device; Axial displacement: alarm@±0.8mm,trip@±1.0mm; Low pressure of lube-oil: [email protected], AC oil pump start@ 0.05Mpa-g, DC oil pump [email protected], [email protected], Electric turning gear [email protected]; High-temperature of bearing: metal: alarm@90°C, trip@105°C/return oil: alarm@65°C, trip@75°C; Cylinder expansion diff.: alarm@-1mm & 3.5mm; [email protected] & 4.0mm
 

TYPICAL TECHNICAL PARAMETER FOR REFERENCE
MODEL	CAPACITY (MW)	INLET STEAM PARAMETERS			EXHAUST STEAM PARAMETERS		STEAM RATE (kg/kW·h)	SPEED  (rpm)	LAYOUT	REMARKS
		FLOW (t/h)	PRESS. (Mpa)	TEMP. (ºC)	PRESS. (Mpa)	TEMP. (ºC)
B3-8.83/0.49	3	21.5	8.83	535	0.49	227.4	7.11	7500/3000	Single
B3-8.83/0.785	3	24.5	8.83	535	0.785	263.9	8.049	7500/3000	Single
B6-8.83/1.2	6	54.6	8.83	535	1.2	~290	9.1	6500/3000	Double
B7.5-8.83/0.981	7.5	57.2	8.83	535	0.981	273.4	7.627	6500/3000	Double
B10-8.83/0.981	10.6	80	8.83	535	0.981	264.1	7.5	6500/3000	Double
B12-8.83/0.981	12	90	8.83	535	0.981	264.1	7.5	6500/3000	Double
B12-9.3/0.981	12	92.4	9.3	515	0.981	248	7.7	3000	Double
B15-8.0/0.49	15	105	8	470	0.49	174.04	7	3000	Double
B15-8.83/0.981	15.7	120	8.83	535	0.981	262.5	7.624	3000	Double	Temp. of boiler feed  water 215ºC
B15-9.2/0.981	15	115	9	535	0.981	260	7.667	3000	Double	Temp. of boiler feed  water 215ºC
B18-8.83/0.883	18	128.16	8.83	535	0.883	253	7.12	3000	Double
B18-9.0/0.981	18.4	144	9	535	0.98	264.6	7.826	3000	Double	Temp. of boiler feed  water 215ºC
B20-8.83/0.981	20	147	8.83	535	0.981	257	7.35	3000	Double	Temp. of boiler feed  water 215ºC
B20-13.24/0.785	20	131	13.24	535	0.785	197.9	6.55	3000	Double	Temp. of boiler feed  water 215ºC
B25-8.83/0.785	25	185	8.83	535	0.785	240.55	7.378	3000	Double	Temp. of boiler feed  water 215ºC
B30-8.83/0.981	30	220.5	8.83	535	0.981	257	7.35	3000	Double	Temp. of boiler feed  water 215ºC
B32-12.7/0.981	32	228.16	12.7	535	0.981	221.2	7.13	3000	Double	Temp. of boiler feed  water 215ºC
B40-8.83/0.7	40	273	8.83	535	0.7	224	6.825	3000	Double	Temp. of boiler feed  water 215ºC
B50-8.83/0.981	50	360	8.83	535	0.981	249.3	7.179	3000	Double	Temp. of boiler feed  water 215ºC
B50-13.24/0.98	50	331	13.24	535	0.98	212	6.62	3000	Double	Temp. of boiler feed  water 215ºC

TYPICAL TECHNICAL PARAMETER FOR REFERENCE - HIGH BACKPRESSURE
MODEL	CAPACITY (MW)	INLET STEAM PARAMETERS			EXHAUST STEAM PARAMETERS		STEAM RATE (kg/kW·h)	SPEED  (rpm)	LAYOUT	REMARKS
		FLOW (t/h)	PRESS. (Mpa)	TEMP. (ºC)	PRESS. (Mpa)	TEMP. (ºC)
B4.5-8.83/2.2	4.5	54.9	8.83	535	2.2	~367	12.2	6500/3000	Single
B6-9.3/2.8	6	82.3	9.3	535	2.8	376.8	13.715	6500/3000	Double
B7-8.83/3.63	7	128	8.83	535	3.63	~417	18.28	6500/3000	Double
B7-9.0/3.5	7	122	9	535	3.5	/	17.42	6500/3000	Double
B7-9.2/6.7	7	364	9.2	535	6.7	492.2	52	3000	Double
B7-12.7/6.0	7	154	12.7	535	6	434	22	3000	Double
B9-8.83/5.0	9	249	8.83	535	5	/	27.67	3000	Double
B10-8.83/4.6	10	229	8.83	535	4.6	445.1	22.9	3000	Double
B12-9.4/2.8	11.5	150	9.4	535	2.8	376.3	13.043	3000	Double
B12-11.4/4.2	12	192	11.4	530	4.2	401.99	16	3000	Double
B12-13.24/6.7	10.815	252	13.24	535	6.7	441.6	23.3	3000	Double
B15-9.0/3.0	15	210	9	535	3	/	14	3000	Double
B15-13.24/6.7	15	345.6	13.24	535	6.7	441.6	23.04	3000	Double
B18-8.83/2.6	17.5167	216	8.83	535	2.6	370.3	12.331	3000	Double
B20-8.83/4.1	20	382	8.83	535	4.1	/	19.1	3000	Double
B20-9.5/4.5	20.25	400	8.83	535	4.5	431.7	19.75	3000	Double
B20-11.2/3.1	20.5	238.6	11.2	491.4	2.99	323.7	11.64	3000	Double
B22-9.5/4.5	22	430	9.5	535	4.5	431.07	19.55	3000	Double
B22-13.24/2.6	22	220	13.24	535	2.6	319.4	9.966	3000	Double
B50-8.83/1.6	50	442	8.83	535	1.6	314.9	8.84	3000	Double

FACTORY ABILITY

WORKSHOP

MECHINING EQUIPMENT

ASSEMBLY AREA

HEAT TREATMENT PROCESS

ANALYSIS LABROTRY

ROTOR DYNAMIC BALANCE

FAQ
1. The he Model Select of steam turbine should according to the requirement of actual process and working condition, overload operating and low parameter running will affect the efficiency of steam turbine greatly;
2. Our port of loading is Qingdao seaport, P.R.China;

3. Our delivery time is from 5 to 7 months after we get the 30% deposit payment;

4. Our product warranty time is one year from delivery time;

5. Our common payment term is 30% of contract amount by T/T advanced as deposit, balance 70% before shipment by T/T or L/C at sight;

6. If your need the certificate that issue by a third party, please let us know;
7. We can provide field guide service during installation and debugging, but the user should pay the cost against international practice.