System Features
The design technology of turbine expander is more mature.
Distributed design, single machine can achieve small power to high power arbitrary design.
Unit cost is low, and the cost of single high-power machine is relatively low compared with that of many parallel small units.
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Condensate waste heat power generation project of a coal chemical enterprise
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The technical transformation project added a 3.3MW condensing saturated steam turbine power generation system.
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Project Process Drawing
Heat source process flow chart
Waste heat power generation system PFD
Retrofit Scheme
Nozzle group and separator, regulating stage sheath
The nozzle is of assembly welded type or band welded type structure. It is bolted to the cylinder nozzle chamber. The lower half partition board is supported on the two suspension pins at the split face of the cylinder, and the bottom is provided with a certain position key with the cylinder, and the upper and lower partition board is provided with a sealing key and a positioning pin at the middle split face. The adjustable stage sheath is supported on the cylinder by a "hanging ear" structure with positioning screws on both sides of the hanging ear.
Cylinder
It has a vertical and horizontal center section, and can not be disassembled after the front and rear cylinders are connected. The steam chamber is welded to the front cylinder. The new steam enters the cylinder through the main valve, and the exhaust port of the rear cylinder is rigidly connected with the condenser. The front cylinder and the front bearing seat are connected by "lower cat claw", and the rear cylinder is supported on the rear seat frame by the side support feet on both sides, and there is a horizontal sliding pin between the support feet and the rear seat frame. The center of the transverse slide pin forms the dead point of the cylinder thermal expansion with the center of the longitudinal slide pin of the rear bearing seat and the front seat frame.
Bearing
The front bearing and thrust bearing of the turbine are composed of spherical combined bearings. The thrust bearing is of swing tile type. When the diameter of the current bearing is ≥φ180mm, an adjusting needle valve is provided at the oil return of the thrust bearing, which can be adjusted according to the oil return temperature. The front and rear radial bearings are elliptical bearings. The main push block and the lower half bearing of the radial bearing are equipped with platinum thermal resistance.
Main valve and main valve control seat
The main valve is a single seat stop valve. The control seat is hydraulic. The pressure oil is controlled by a security device. When the security device is suspended, the security oil flow enters the control seat cylinder and pushes the piston to move, and the main valve can be opened. When the security device is operated, the security oil pressure is rapidly reduced, but the oil pressure in the control seat is quickly discharged under the action of the spring force, and the oil in the cylinder is quickly closed.
Regulating steam valve and connecting rod
It is a group valve lifting plate structure. When the load changes, each valve disc is opened in a certain order. Disc travel, factory-adjusted.
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Project Site
Project Site
Project Site
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