CN211009174U - Steam-electricity double-drive axial flow compressor and energy recovery turbine unit - Google Patents

Abstract

The utility model discloses a steam-electricity double-drive axial compressor and energy recovery turbine unit, which comprises a motor generator, an axial compressor, a steam turbine and a gas turbine which are sequentially driven and connected; the axial flow compressor comprises a main shaft with double input ends, the motor generator and the steam turbine are respectively positioned at two ends of the main shaft of the axial flow compressor and can respectively drive the axial flow compressor to operate, and the steam turbine is connected with the gas turbine through a speed change clutch. The utility model discloses a with motor generator, axial compressor, steam turbine and gas turbine setting in same unit, optimized the unit structure.

Description

Steam-electricity double-drive axial flow compressor and energy recovery turbine unit

Technical Field

The utility model belongs to the power machinery engineering field, concretely relates to vapour electricity double-drive axial compressor and energy recovery turbine unit.

Background

The axial flow compressor is a key power air supply device in a blast furnace ironmaking production process system in the metallurgical industry, and the industrial process energy recovery power generation device is an energy-saving and environment-friendly product which is vigorously popularized by China. With the advance of environmental protection and energy conservation strategies in economic construction of China, the trend of improving the energy efficiency of units and optimizing the arrangement form of the units becomes inevitable.

In the process and arrangement of the split-shaft type unit, the steam-driven axial flow compressor unit supplies air to the blast furnace by driving the axial flow compressor by the steam turbine, and the coal gas turbine recovers the coal gas energy to generate electricity. The air supply system and the coal gas energy recovery system of the blast furnace are respectively completed by two independent sets of units, so that the equipment investment and construction cost is high, the energy loss of the units is large, the occupied area is large, and the operation and maintenance cost is high.

In addition, in practical situations, when the blast furnace gas turbine is out of order or needs routine maintenance, the axial flow compressor should not be shut down at this time, which brings new problems to the design of the plant.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model aims to provide a vapour electricity dual-drive axial compressor and energy recovery turbine unit sets up motor generator, axial compressor, steam turbine and gas turbine in same unit, has optimized the unit structure.

In order to realize the technical purpose, the utility model discloses a following technical scheme:

a kind of steam-electricity double-drive axial compressor and energy recovery turbine unit, including driving the motor generator, axial compressor, steam turbine and gas turbine that connect sequentially; the axial flow compressor comprises a main shaft with double input ends, the motor generator and the steam turbine are respectively positioned at two ends of the main shaft of the axial flow compressor and can respectively drive the axial flow compressor to operate, and the steam turbine is connected with the gas turbine through a speed change clutch.

Further, the motor generator, the axial flow compressor, the steam turbine and the gas turbine are arranged in the same axial direction.

Further, the motor generator is connected with the axial flow compressor through a gearbox.

Further, the gearbox is a speed-increasing gearbox, and the power range is as follows: 4000 kw-60000 kw, speed ratio range: 2.5 to 5.5.

Further, vibration detection points are arranged at bearings of the motor generator, the axial flow compressor, the steam turbine and the gas turbine, 2 fulcrum shaft vibration sensors are arranged at the vibration detection points, and the 2 fulcrum shaft vibration sensors are installed at an angle of 90 degrees with each other.

Further, the shaft vibration sensor is an eddy current sensor.

Further, the speed change clutch is an overrunning clutch, and the power range is as follows: 2000 kw-30000 kw, speed ratio range: 1.3 to 2.7.

Furthermore, one end of a main shaft of the steam turbine is an input end, the other end of the main shaft of the steam turbine is an output end, the input end is connected with the speed change clutch, and the output end is connected with the axial flow compressor.

Furthermore, two ends of a main shaft of the axial flow compressor are respectively connected with the gearbox and the steam turbine through couplers.

Furthermore, the coupler is a diaphragm coupler, the power range is 4000 kW-60000 kW, and the rotating speed range is 1400 rpm-8200 rpm.

According to the above technical scheme, the utility model provides a two axial compressor and energy recovery turbine unit that drive of vapour electricity through with motor generator, axial compressor, steam turbine and gas turbine setting in same unit, has avoided two sets of units of construction and management, is showing to have reduced aspects such as equipment investment construction cost, unit energy loss, area, operation and maintenance cost.

The utility model discloses two power equipment of well motor generator and steam turbine arrange respectively at axial compressor's both ends, can ensure core power equipment axial compressor's long-term steady operation, when any one power equipment breaks down, drag the axial compressor operation with another power equipment, do not influence production.

The utility model discloses be connected through the speed change clutch between well steam turbine and the gas turbine, when the gas turbine breaks down or needs routine maintenance, realize the disconnection through the speed change clutch, axial compressor need not shut down, does not hinder and is metallurgical blast furnace air feed.

Drawings

Fig. 1 is a schematic structural diagram of a steam-electricity double-drive axial flow compressor and an energy recovery turbine unit according to an embodiment of the present invention.

Description of reference numerals: 1. a motor generator; 2. a coupling; 3. a gearbox; 4. a coupling; 5. an axial flow compressor; 6. a coupling; 7. a steam turbine; 8. a coupling; 9. a speed change clutch; 10. a coupling; 11. a gas turbine.

Detailed Description

For better understanding, the purpose, structure and function of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, a steam-electric double-drive axial flow compressor and energy recovery turbine unit according to an embodiment of the present invention includes a motor generator 1, an axial flow compressor 5, a steam turbine 7 and a gas turbine 11 which are sequentially connected in a driving manner; the axial flow compressor 5 comprises a main shaft provided with double input ends, the motor generator 1 and the steam turbine 7 are respectively positioned at two ends of the main shaft of the axial flow compressor 5 and can respectively drive the axial flow compressor 5 to operate, and the steam turbine 7 is connected with the gas turbine 11 through a speed change clutch 9.

The motor generator 1 has a motor and power generating function, and is used as a motor when the axial flow compressor 5 is driven and as a generator when the axial flow compressor 5 follows.

In this embodiment, two power devices, namely the motor generator 1 and the steam turbine 7, are respectively arranged at two ends of the axial flow compressor 5, so that the long-term stable operation of the axial flow compressor 5 of the core power device can be ensured, and when any one power device fails, the other power device is used for dragging the axial flow compressor 5 to operate, so that the production is not influenced.

In the embodiment, the steam turbine 7 is connected with the gas turbine 11 through the speed change clutch 9, when the gas turbine 11 breaks down or needs routine maintenance, the speed change clutch 9 is used for realizing disconnection, the axial flow compressor 5 does not need to be stopped, air supply for the metallurgical blast furnace is not delayed, the energy efficiency of a unit can be greatly improved, and the unit arrangement is simplified.

Preferably, as shown in fig. 1, the motor generator 1, the axial flow compressor 5, the steam turbine 7 and the gas turbine 11 are coaxially disposed. The coaxial arrangement scheme has the advantages of compact structure, small occupied area, convenient arrangement, low equipment cost and small investment; and the function is not reduced, the safety margin is not reduced, and the axial flow compressor set can be used for a high-power axial flow compressor set, and is an ideal set used for a metallurgical blast furnace system.

The motor generator 1 is connected with the axial flow compressor 5 through a gearbox 3. An input shaft (or an output shaft) at one end of the gearbox 3 is connected with a main shaft of the motor generator 1 through a coupler 2, and an output shaft (or an input shaft) at the other end of the gearbox 3 is connected with a main shaft of the axial flow compressor 5 through a coupler 4.

The type of gearbox 3 is step-up gearbox, power range: 4000 kw-60000 kw, speed ratio range: 2.5 to 5.5. The gearbox 3 is arranged, so that the speed of the motor generator 1 can be matched with that of the axial flow compressor 5, and the transmission efficiency is improved.

The bearing positions of the motor generator 1, the axial flow compressor 5, the steam turbine 7 and the gas turbine 11 are provided with vibration detection points, the vibration detection points are provided with 2 fulcrum shaft vibration sensors, the 2 fulcrum shaft vibration sensors are installed at 90 degrees (X-axis and Y-axis directions are respectively monitored), the shaft vibration sensors can detect the running state of the unit in real time, the vibration state is accurately detected, and the good running of the unit is controlled by analyzing detection signals.

The shaft vibration sensor is an eddy current sensor, and has high detection sensitivity.

The transmission clutch 9 may comprise an overrunning clutch, or a gearbox and an overrunning clutch. When the rotating speed of the input side of the overrunning clutch tends to exceed that of the output side, the overrunning clutch is engaged, and the output side is driven; when the input side rotation speed of the overrunning clutch tends to be reduced relative to the output side, a reverse torque is generated, and the overrunning clutch is disengaged.

Power range of the transmission clutch 9: 2000 kw-30000 kw, speed ratio range: 1.3 to 2.7.

One end of a main shaft of the steam turbine 7 is an input end, the other end of the main shaft is an output end, the input end is connected with the speed change clutch 9, and the output end is connected with the axial flow compressor 5.

The steam turbine 7 is connected with the gas turbine 11 through the speed change clutch 9, so that the speed of the gas turbine 11 is matched with that of the steam turbine 7, and the transmission efficiency is improved.

Two ends of a main shaft of the axial flow compressor 5 are respectively connected with the gearbox 3 and the steam turbine 7 through couplings 4 and 6.

The type of the couplings 4 and 6 is a diaphragm coupling, the power range is 4000 kW-60000 kW, and the rotating speed range is 1400 rpm-8200 rpm.

The steam-electricity double-drive axial flow compressor and the energy recovery turbine unit in the embodiment have the following beneficial effects:

the electric-steam double-drive mode effectively solves the problem of steam balance of the steam-driven coaxial unit, the steam turbine drives the axial flow compressor to supply air to the blast furnace, coal gas generated after the blast furnace is put into operation drives the gas turbine and the steam turbine to jointly drive the axial flow compressor, and after the gas turbine is put into operation, the motor generator serves as a driven machine and generates power by using residual steam, so that the problem that the residual steam cannot go is solved; when the turbine is quitted due to faults, the motor generator is used as a prime motor to drive the axial flow compressor, so that the problem that steam of the turbine cannot be quickly supplemented is solved, and the production of the blast furnace is not influenced.

It is to be noted that unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the present invention belongs.

In the description of the present application, it is to be understood that the terms "middle", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

In the description of the present invention, "a plurality" means two or more unless otherwise specifically limited.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims (10)

1. A steam-electricity double-drive axial flow compressor and an energy recovery turbine unit are characterized by comprising a motor generator, an axial flow compressor, a steam turbine and a gas turbine which are sequentially connected in a driving manner; the axial flow compressor comprises a main shaft with double input ends, the motor generator and the steam turbine are respectively positioned at two ends of the main shaft of the axial flow compressor and can respectively drive the axial flow compressor to operate, and the steam turbine is connected with the gas turbine through a speed change clutch.

2. The dual-drive axial compressor and energy recovery turbine unit as claimed in claim 1, wherein the motor generator, the axial compressor, the steam turbine and the gas turbine are coaxially disposed.

3. The steam-electric dual-drive axial flow compressor and energy recovery turbine unit as claimed in claim 1, wherein the motor generator is connected with the axial flow compressor through a gearbox.

4. The steam-electric dual-drive axial flow compressor and energy recovery turbine unit as claimed in claim 3, wherein the gearbox is a speed increasing gearbox, and the power range is as follows: 4000 kw-60000 kw, speed ratio range: 2.5 to 5.5.

5. The steam-electric dual-drive axial flow compressor and energy recovery turbine unit as claimed in claim 1, wherein vibration detection points are arranged at bearings of the motor generator, the axial flow compressor, the steam turbine and the gas turbine, 2 fulcrum shaft vibration sensors are arranged at the vibration detection points, and the 2 fulcrum shaft vibration sensors are arranged at 90 degrees to each other.

6. The dual-drive axial compressor and energy recovery turbine unit as claimed in claim 5, wherein the shaft vibration sensor is an eddy current sensor.

7. The gasoline-electric dual-drive axial flow compressor and energy recovery turbine unit as claimed in claim 1, wherein the speed change clutch is an overrunning clutch, and the power range is as follows: 2000 kw-30000 kw, speed ratio range: 1.3 to 2.7.

8. The steam-electric double-drive axial flow compressor and energy recovery turbine unit as claimed in claim 1, wherein one end of the main shaft of the steam turbine is an input end, the other end of the main shaft is an output end, the input end is connected with the speed change clutch, and the output end is connected with the axial flow compressor.

9. The steam-electric double-drive axial flow compressor and energy recovery turbine unit as claimed in claim 3, wherein two ends of a main shaft of the axial flow compressor are respectively connected with the gearbox and the steam turbine through couplers.

10. The steam-electric double-drive axial flow compressor and energy recovery turbine unit as claimed in claim 9, wherein the coupling is a diaphragm coupling, the power range is 4000kW to 60000kW, and the rotation speed range is 1400rpm to 8200 rpm.

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