CN217950481U

CN217950481U - ORC system adopting two-stage turbine expansion and power generation integrated machine

Info

Publication number: CN217950481U
Application number: CN202222372916.2U
Authority: CN
Inventors: 谈西锋
Original assignee: Shaanxi Lingfengzhi New Energy Technology Co ltd
Current assignee: Shaanxi Lingfengzhi New Energy Technology Co ltd
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2022-12-02
Anticipated expiration: 2032-09-07

Abstract

The utility model discloses an adopt ORC system of two-stage turbo expansion power generation all-in-one, including evaporimeter, one-level expander, generator, second grade expander, condenser, liquid storage pot and working medium pump, evaporimeter, one-level expander, second grade expander, condenser, liquid storage pot and working medium pump pass through the pipeline end to end connection in proper order, the one-level expander sets up the one end at the generator, the second grade expander sets up the other end at the generator, one-level expander and second grade expander provide power for the generator. The unit is directly driven by a packaged high-speed motor, and two turbo-expanders are respectively arranged at two ends of the motor by back rests, so that most of axial force can be balanced. The reliability and stability of the all-in-one machine are improved, and the system can operate efficiently and stably.

Description

ORC system adopting two-stage turbine expansion power generation integrated machine

Technical Field

The utility model belongs to the technical field of the ORC electricity generation, especially, relate to an ORC power generation system of two-stage turbine expansion electricity generation all-in-one.

Background

Organic Rankine Cycle (ORC) is a Rankine Cycle which takes low-boiling point Organic matters as working media, the working principle of the ORC is that the Organic working media absorb heat from waste heat flow in a heat collector to generate steam with certain pressure and temperature, and the steam enters an expander to expand to do work, so as to drive a generator or drag other power machinery to do work. At present, ORC is mainly used in power generation systems. The ORC power generation system converts heat energy into electric energy, and can improve the utilization rate of energy. The existing ORC system is mainly characterized in that an expansion machine is connected with a generator through a coupler, and is mainly a single-stage high-speed turbine expansion machine, so that the expansion ratio is large, the rotating speed is high, the sealing is not easy to solve, the axial thrust is large, the structural reliability of the motor is poor, and the service life is influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model aims to provide an adopt ORC system of two-stage turbine expansion power generation all-in-one, the unit adopts the high-speed motor of encapsulated to directly drive, and two turbo expander back rests are arranged respectively at the motor both ends, can balance most axial force, have increased the reliable stability of all-in-one, can make the high-efficient steady operation of system.

The utility model provides a following technical scheme:

the utility model provides an adopt ORC system of two-stage turbo expansion electricity generation all-in-one, includes evaporimeter, one-level expander, generator, second grade expander, condenser, liquid storage pot and working medium pump, evaporimeter, one-level expander, second grade expander, condenser, liquid storage pot and working medium pump pass through the pipeline end to end connection in proper order, the one-level expander sets up the one end at the generator, the second grade expander sets up the other end at the generator, one-level expander and second grade expander provide power for the generator.

Preferably, the generator is a double-shaft generator, the primary expander and the secondary expander are both sleeved on a rotating shaft of the generator, and the primary expander and the secondary expander are symmetrically arranged.

Preferably, the rotating shaft of the generator is connected with impellers of the first-stage expander and the second-stage expander.

Preferably, a sealing shell is arranged on the outer side of the generator, a motor base is arranged at the bottom of the inner side of the sealing shell, and the generator is connected with the motor base.

Preferably, the primary expansion machine and the secondary expansion machine are both provided with an air inlet and an air outlet, the air inlet of the primary expansion machine is connected with the air outlet of the evaporator, and the air outlet of the primary expansion machine is connected with the air inlet of the secondary expansion machine

Preferably, the surface of the generator is provided with a heat conduction pipe, the surface of the sealing shell is provided with a through hole, one end of the heat conduction pipe penetrates through one through hole to be connected with the output end of the working medium pump, and the other end of the heat conduction pipe penetrates through the other through hole to be connected with the air inlet of the condenser.

Preferably, the inner sides of the through holes are provided with sealing rings, and the heat conduction pipes are located on the inner sides of the sealing rings.

Preferably, the rotor of the generator is connected to the base by a bearing.

Preferably, the bearing is any one of a rolling bearing, an air bearing or a magnetic suspension bearing.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) The utility model relates to an adopt ORC system of two-stage turbine expansion power generation all-in-one, through setting up two turbo expander, two expander act on the both ends of generator, can offset the axial force that the generator received each other, can reduce the rotational speed of generator simultaneously, improve the torque of generator shaft, increased the stability of system, can make the generator steady operation.

(2) The utility model relates to an adopt ORC system of two-stage turbine expansion power generation all-in-one, through setting up the condenser box, two flabellum in the expander is each other for the mirror image setting, can make the pivot rotation opposite direction in two expanders to the needs of biax generator electricity generation have been adapted to.

(3) The utility model relates to an adopt ORC system of two-stage turbo expansion electricity generation all-in-one, through setting up two turbo expander, can fully turn into the electric energy with the heat energy of organic working medium, conversion efficiency is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic diagram of the system of the present invention.

Fig. 2 is a schematic diagram of the connection between the generator and the expander according to the present invention.

Fig. 3 is a schematic view of the sealing case of the present invention.

Fig. 4 is a schematic view of a second expander according to an embodiment of the present invention.

In the figure: 1. a working medium pump; 2. an evaporator; 3. a primary expander; 4. a generator; 5. a secondary expander; 6. a condenser; 7. a liquid storage tank; 8. a base; 9. an air inlet; 10. an air outlet; 11. sealing the shell; 12. a heat conducting pipe; 13. a housing; 14. a first bearing; 15. a rotating shaft; 16. a fan blade; 17. a second bearing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention will be combined to clearly and completely describe the technical solutions of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example one

As shown in fig. 1-3, an ORC system adopting a two-stage turbo expansion and power generation integrated machine comprises an evaporator 2, a first-stage expander 3, a power generator 4, a second-stage expander 5, a condenser 6, a liquid storage tank 7 and a working medium pump 1, wherein the evaporator 2, the first-stage expander 3, the second-stage expander 5, the condenser 6, the liquid storage tank 7 and the working medium pump 1 are sequentially connected end to end through pipelines, the evaporator transfers external heat energy to an organic working medium to heat the organic working medium, the organic working medium passes through the first-stage expander 3 and the second-stage expander 5, the first-stage expander 3 and the second-stage expander 5 can rotate, the driven power generator 4 rotates to generate power, the condenser condenses and cools off exhaust steam flowing out through the second-stage expander, the first-stage expander 3 is arranged at one end of the power generator 4, the second-stage expander 5 is arranged at the other end of the power generator 4, the first-stage expander 3 and the second-stage expander 5 provide power for the power generator 4, and the power generator 4 rotates to generate electric energy for the power generator 4.

The generator 4 is a double-shaft generator, the primary expansion machine 3 and the secondary expansion machine 5 are both sleeved on a rotating shaft of the generator 4, and the primary expansion machine 3 and the secondary expansion machine 5 are symmetrically arranged. The rotating shaft of the generator 4 is connected with impellers of the first-stage expander 3 and the second-stage expander 5, the first-stage expander 3 and the second-stage expander 5 are both radial turbine expanders, and the first-stage expander 3, the second-stage expander 5 and the generator 4 share one rotating shaft. And the rotor of the generator is connected with the base through a bearing. The bearing is any one of a rolling bearing, an air bearing or a magnetic suspension bearing.

The outside of generator 4 is provided with sealed shell 11, the inboard bottom of sealed shell 11 is provided with motor base 8, generator 4 is connected with motor base 8, has guaranteed the holistic leakproofness of one-level expander 3, second grade expander 5 and generator 4 through setting up sealed shell 11, avoids one-level expander 3, second grade expander 5 to take place organic working medium's leakage in the use.

The primary expansion machine 3 and the secondary expansion machine 5 are both provided with an air inlet 9 and an air outlet 10, the air inlet 9 of the primary expansion machine 3 is connected with the air outlet of the evaporator 2, and the air outlet 10 of the primary expansion machine 3 is connected with the air inlet 9 of the secondary expansion machine 5.

The surface of the generator 4 is provided with a heat conduction pipe 12, specifically, the heat conduction pipe 12 is wound on the surface of the generator 4, the surface of the sealing shell 11 is provided with through holes 18, one end of the heat conduction pipe 12 penetrates through one of the through holes 18 to be connected with the output end of the working medium pump 1, and the other end of the heat conduction pipe 12 penetrates through the other through hole 18 to be connected with the air inlet of the condenser. The inner sides of the through holes 18 are all provided with a sealing ring, and the heat conduction pipe 12 is located on the inner side of the sealing ring. Through setting up heat pipe 12 for lower the temperature to generator 4, the heat transfer that the generator produced is to the organic working medium in the heat pipe, then is used for the electricity generation of system, has guaranteed the stability of the bulk temperature of generator.

Example two

As shown in fig. 1-4, an ORC system adopting a two-stage turbine expansion and power generation integrated machine comprises an evaporator 2, a first-stage expander 3, a generator 4, a second-stage expander 5, a condenser 6, a liquid storage tank 7 and a working medium pump 1, wherein the evaporator 2, the first-stage expander 3, the second-stage expander 5, the condenser 6, the liquid storage tank 7 and the working medium pump 1 are sequentially connected end to end through pipelines, the first-stage expander 3 is arranged at one end of the generator 4, the second-stage expander 5 is arranged at the other end of the generator 4, the first-stage expander 3 and the second-stage expander 5 provide power for the generator 4, and the first-stage expander 3 and the second-stage expander 5 drive the generator 4 to rotate, so that the generator 4 generates electric energy.

The generator 4 is a double-shaft generator, the primary expansion machine 3 comprises a shell 13, fan blades 16 are arranged in the shell 13, a rotating shaft 15 of the generator is connected with the fan blades 16, an air inlet 9 and an air outlet 10 are arranged on the shell 13, the air inlet 9 is located on one side of the fan blades 16, and the air outlet 10 is located on the other side of the fan blades 16. A first bearing 14 and a second bearing 17 are arranged in the shell 13, one end of the rotating shaft 15 is connected with the first bearing 14, and the other end is connected with the second bearing 17. Second grade expander 5 includes shell 13, be provided with flabellum 16 in the shell 13, the pivot 15 and the flabellum 16 of generator are connected, be provided with air inlet 9 and gas outlet 10 on the shell 13, air inlet 9 is located one side of flabellum 16, gas outlet 10 is located the opposite side of flabellum 16, flabellum 16 in the second grade expander 5 and the flabellum in the first grade expander 3 are each other the mirror image setting, and flabellum 16 through the mirror image setting can make the pivot of first grade expander 3 and the pivot of second grade expander 5 turn to the contrary, have adapted to the needs of biax generator.

The device that obtains through above-mentioned technical scheme is an ORC system that adopts two-stage turbine expansion power generation all-in-one, and through setting up one-level expander 3 and second grade expander 5, one-level expander 3 and second grade expander 5 drive generator and rotate to make the generator produce the electric energy, two expanders act on the both ends of generator, can offset the axial force that the generator received each other, have increased the stability of system, can make the generator steady operation. During power generation, the primary expander 3 and the secondary expander 5 rotate in opposite directions.

The specific mechanisms and working principles of the expander, the evaporative cooler and the dual-shaft generator, and the selection of the organic working medium are all the prior art, and are not described herein.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides an adopt ORC system of two-stage turbine expansion power generation all-in-one, its characterized in that, including evaporimeter (2), one-level expander (3), generator (4), second grade expander (5), condenser (6), liquid storage pot (7) and working medium pump (1), evaporimeter (2), one-level expander (3), second grade expander (5), condenser (6), liquid storage pot (7) and working medium pump (1) are through the pipeline end to end connection in proper order, one-level expander (3) set up the one end at generator (4), second grade expander (5) set up the other end at generator (4), one-level expander (3) and second grade expander (5) provide power for generator (4).

2. The ORC system adopting the two-stage turbo-expansion and power generation all-in-one machine as claimed in claim 1, wherein the generator (4) is a double-shaft generator, the first-stage expander (3) and the second-stage expander (5) are both sleeved on a rotating shaft of the generator (4), and the first-stage expander (3) and the second-stage expander (5) are arranged symmetrically with each other.

3. The ORC system with two-stage turbo-expansion and power generation integrated machine according to claim 2, wherein the rotating shaft of the power generator (4) is connected with the impellers of the first-stage expander (3) and the second-stage expander (5).

4. The ORC system adopting the two-stage turbo-expansion and power generation all-in-one machine as claimed in claim 1, wherein a sealed shell (11) is arranged outside the generator (4), a motor base (8) is arranged at the bottom of the inner side of the sealed shell (11), and the generator (4) is connected with the motor base (8).

5. The ORC system adopting the two-stage turbo-expansion and power generation all-in-one machine is characterized in that the primary expander (3) and the secondary expander (5) are respectively provided with an air inlet (9) and an air outlet (10), the air inlet (9) of the primary expander (3) is connected with the air outlet of the evaporator (2), and the air outlet (10) of the primary expander (3) is connected with the air inlet (9) of the secondary expander (5).

6. The ORC system with the two-stage turboexpander and power generation all-in-one machine is characterized in that the surface of the generator (4) is provided with a heat conducting pipe (12), the surface of the sealing shell (11) is provided with through holes (18), one end of the heat conducting pipe (12) penetrates through one of the through holes (18) to be connected with the output end of the working medium pump (1), and the other end of the heat conducting pipe (12) penetrates through the other through hole (18) to be connected with the air inlet of the condenser (6).

7. The ORC system with two-stage turboexpander and power generation all-in-one machine according to claim 6, wherein the through holes (18) are provided with sealing rings on the inner sides, and the heat conducting pipes (12) are positioned on the inner sides of the sealing rings.

8. The ORC system of claim 1 wherein the rotor of the generator is coupled to the base by a bearing.

9. The ORC system with two-stage turbo-expansion power generation all-in-one machine according to claim 8, wherein the bearing is any one of a rolling bearing, an air bearing or a magnetic suspension bearing.