CN212841522U

CN212841522U - Deaerator heating system with screw expander generator set

Info

Publication number: CN212841522U
Application number: CN202021409529.6U
Authority: CN
Inventors: 朱水兴; 汪书华; 戴林祥; 杨明; 王文杰; 杨伟春
Original assignee: Hangzhou Linjiang Environmental Protection Thermoelectricity Co ltd
Current assignee: Hangzhou Linjiang Environmental Protection Thermoelectricity Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-03-30
Anticipated expiration: 2030-07-16

Abstract

The utility model belongs to the technical field of the energy utilization technique and specifically relates to a deaerator heating system with screw rod expander generating set is related to. The pressure of the heating steam supplied to the high-pressure deaerator is higher, and the pressure adjustment needs to be carried out through the adjusting valve, and due to the throttling effect of the adjusting valve, the pressure can be reduced, so that the heating steam pressure conforming to the high-pressure deaerator is achieved. But among the above-mentioned prior art, the pressure reduction of heating steam can lead to the energy loss of some steam to cause the waste of steam energy, this scheme includes high pressure oxygen-eliminating device, is connected with booster pump and feed pump on the high pressure oxygen-eliminating device, is connected with the heating steam pipeline on the high pressure oxygen-eliminating device, is equipped with screw generator set on the heating steam pipeline, and screw generator set's input and output all are equipped with the stop valve. The scheme can convert lost steam energy into high-quality energy, improve the utilization rate of the energy and improve the production benefit of enterprises.

Description

Deaerator heating system with screw expander generator set

Technical Field

The utility model belongs to the technical field of the energy utilization technique and specifically relates to a deaerator heating system with screw rod expander generating set is related to.

Background

In industrial production, steam produced by thermoelectric enterprises is used for supplying the enterprises with units for production and use. The steam usage of these businesses varies greatly with the season and time due to the varying production load of the supply units.

In a conventional general thermoelectric enterprise, the flow rate of boiler feed water is controlled by a feed water system, so that the supply amount of steam is controlled. As shown in fig. 1, the water supply system comprises a high-pressure deaerator 1, a booster water pump 2 and a water supply pump 3, wherein the high-pressure deaerator 1 is connected with a heating steam pipeline 4, and the heating steam pipeline is provided with a regulating valve 5. The booster water pump 2 is used for supplying water to the high-pressure deaerator 1, the water feed pump 3 is used for conveying heated high-temperature water to the boiler, and the regulating valve 5 is used for controlling the pressure of heating steam entering the high-pressure deaerator 1.

The pressure of the heating steam supplied to the high-pressure deaerator is higher, and the pressure adjustment needs to be carried out through the adjusting valve, and due to the throttling effect of the adjusting valve, the pressure can be reduced, so that the heating steam pressure conforming to the high-pressure deaerator is achieved. However, in the above prior art, the pressure of the heating steam is reduced, which results in energy loss of a part of the steam, thereby causing waste of steam energy.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a deaerator heating system with screw rod expander generating set can become the energy of high-quality with the steam energy conversion of loss, improves the utilization ratio of energy, improves the productivity effect of enterprise.

The above technical purpose of the present invention can be achieved by the following technical solutions:

the utility model provides a deaerator heating system with screw rod expander generating set, includes high pressure deaerator, be connected with booster pump and water-feeding pump on the high pressure deaerator, be connected with the heating steam pipeline on the high pressure deaerator, be equipped with screw rod generating set on the heating steam pipeline, screw rod generating set's input and output all are equipped with the stop valve.

Through adopting above-mentioned technical scheme, utilize screw generator set, replace the governing valve to heat the pressure regulation of steam pipeline, realize retrieving the effect of steam pressure energy, the steam energy that will retrieve simultaneously is used for the electricity generation, realize the purpose of loss steam energy conversion for the high-quality energy, the utilization ratio of energy is improved, through adjusting the stop valve, input steam volume and output steam volume through screw generator set are controlled, simultaneously can also be through turning off the stop valve, realize screw generator set's isolation on heating the steam pipeline, thereby be convenient for subsequent maintenance and change.

The present invention may be further configured in a preferred embodiment as: the high-pressure deaerator is characterized in that a standby heating pipeline is further arranged on the high-pressure deaerator, one end of the standby heating pipeline is connected with the high-pressure deaerator, the other end of the standby heating pipeline is connected with a heating steam pipeline at the input end of the screw generator set, and a regulating valve is arranged on the standby heating pipeline.

By adopting the technical scheme, the standby heating pipeline is used as a bypass of the screw generator set, so that when the screw generator set breaks down, the high-pressure deaerator can still heat through the standby heating pipeline, the stability of the system is improved, the regulating valve is arranged, the steam pressure regulation effect can still be realized when the standby heating pipeline runs, and the running reliability of the system is improved.

The present invention may be further configured in a preferred embodiment as: the screw generator set comprises a base fixed on the ground, a compressor and a generator, wherein the compressor and the generator are fixedly placed on the base, a connecting mechanism is arranged between the compressor and the generator, and a steam seal cooling mechanism and a lubricating oil mechanism are arranged on the compressor.

Through adopting above-mentioned technical scheme, the impeller rotation in the steam drive compressor, the impeller passes through coupling mechanism and drives the main shaft rotation in the generator, realizes the conversion of energy, and gland sealing cooling body is used for collecting the gas leakage at compressor both ends, and cools off to the comdenstion water and retrieve and recycle, and lubricating oil mechanism is used for providing lubricating oil to the bearing at compressor both ends, cools off lubricating oil simultaneously, realizes the cyclic utilization of lubricating oil.

The present invention may be further configured in a preferred embodiment as: the connecting mechanism comprises a first coupler arranged on the compressor, a second coupler arranged on the generator and a gear box arranged between the first coupler and the second coupler and used for reducing speed.

By adopting the technical scheme, the first coupler is adopted between the compressor and the gear box, the second coupler is adopted between the gear box and the generator, and the first coupler and the second coupler are elastic laminated couplers, so that the capacity of absorbing axial misalignment, radial misalignment and angular misalignment is realized, and the first coupler and the second coupler can reliably run under various working conditions of the compressor.

The present invention may be further configured in a preferred embodiment as: the vapor seal cooling mechanism comprises a gas leakage pipeline arranged at two ends of the compressor along the length direction, a vapor seal cooler arranged at one end of the gas leakage pipeline far away from the compressor, an exhaust pipe arranged on the vapor seal cooler, and an exhaust fan arranged on the exhaust pipe, wherein an outlet of the exhaust fan is communicated with the outside, and a cooling water inlet pipe and a cooling water outlet pipe are arranged on the vapor seal cooler.

By adopting the technical scheme, the steam seal cooler has the advantages that the air leakage pipelines of the front and the rear steam seals of the compressor slightly carry negative pressure, so that the leaked steam continuously enters the steam seal cooler through the air leakage pipelines, the steam is condensed into water, the subsequent boiler is convenient to recycle, simultaneously, the uncondensable air in the leaked steam is discharged to the atmosphere through the exhaust pipe and the exhaust fan, and the uncondensable gas in the steam is reduced.

The present invention may be further configured in a preferred embodiment as: the lubricating oil mechanism comprises oil pipes arranged on bearings at two ends of the compressor, an oil tank arranged at one end of the oil pipe far away from the compressor, an oil pump arranged on the oil pipe and an oil cooler.

Through adopting above-mentioned technical scheme, start the oil pump, lubricating oil in the oil pump with the oil tank lubricates in the bearing of leading-in compressor both ends through oil pipe, realizes the cooling and the lubrication action of bearing, and lubricating oil carries out the heat transfer after the temperature risees, and the oil cooler is used for cooling lubricating oil, realizes the used circulation of lubricating oil.

The present invention may be further configured in a preferred embodiment as: the compressor and the generator are both arranged on the same base.

Through adopting above-mentioned technical scheme, compressor and generator are two independent equipment, and the vibration that takes place is asynchronous, and compressor and generator setting are on same base, and the vibration that takes place can offset each other to reduce the whole vibration level of generator and compressor.

The present invention may be further configured in a preferred embodiment as: and protective covers are covered on the peripheries of the compressor and the generator.

Through adopting above-mentioned technical scheme, the protection casing covers compressor and generator pivoted part and establishes to keep apart personnel and equipment, reduce personnel injured's risk.

To sum up, the utility model discloses a beneficial technological effect does:

1. the screw generator set is used for replacing a regulating valve to regulate the pressure of a heating steam pipeline, so that the effect of recovering steam pressure energy is realized, the recovered steam energy is used for generating electricity, the purpose of converting lost steam energy into high-quality energy is realized, the utilization rate of the energy is improved, the input steam quantity and the output steam quantity of the screw generator set are controlled by regulating a stop valve, and meanwhile, the stop valve can be turned off to realize the isolation of the screw generator set on the heating steam pipeline, so that the subsequent maintenance and replacement are facilitated;

2. the standby heating pipeline is used as a bypass of the screw generator set, so that when the screw generator set breaks down, the high-pressure deaerator can still heat through the standby heating pipeline, the stability of the system is improved, the regulating valve is arranged, the steam pressure regulating effect can still be achieved when the standby heating pipeline runs, and the running reliability of the system is improved.

Drawings

FIG. 1 is a schematic diagram of a prior art configuration;

FIG. 2 is a schematic structural diagram of the present embodiment;

FIG. 3 is a front view of a screw generator set;

FIG. 4 is a side view of a screw generator set;

FIG. 5 is a top view of a screw generator set.

In the figure, 1, a high-pressure deaerator; 2. a booster water pump; 3. a feed pump; 4. heating the steam line; 5. a screw generator set; 6. a stop valve; 7. a backup heating line; 8. adjusting a valve; 9. a base; 10. a compressor; 11. a generator; 12. a connecting mechanism; 13. a first coupling; 14. a gear case; 15. a second coupling; 16. a gland seal cooling mechanism; 17. a blow-by line; 18. a common pipe; 19. a gland seal cooler; 20. an air exhaust pipe; 21. an exhaust fan; 22. a cooling water inlet pipe; 23. a cooling water outlet pipe; 24. a lubricating oil mechanism; 25. an oil pipe; 26. an oil pump; 27. an oil cooler; 28. a shield.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 2, a deaerator heating system with 11 groups of screw expander generators comprises a high-pressure deaerator 1, wherein a booster water pump 2 and a water feed pump 3 are arranged on the high-pressure deaerator 1, the booster water pump 2 is used for supplying water to the high-pressure deaerator 1, and the water feed pump 3 is used for conveying condensed water heated in the high-pressure deaerator 1 to a boiler. Fixedly connected with heating steam pipeline 4 on the high pressure oxygen-eliminating device 1 is equipped with screw generator set 5 on the heating steam pipeline 4, utilizes screw generator set 5, realizes retrieving the effect of steam pressure energy, is used for generating electricity with the steam energy of retrieving simultaneously, realizes losing the purpose that steam energy converts the high-quality energy into, the utilization ratio of improvement energy. Screw generator set 5's input and output all are equipped with stop valve 6, and two stop valves 6 all set up on heating steam pipeline 4, control input steam volume and output steam volume through screw generator set 5 through adjusting stop valve 6, can also realize the isolation of screw generator set 5 on heating steam pipeline 4 simultaneously through shutoff stop valve 6 to be convenient for subsequent maintenance and change.

Still fixedly connected with spare heating pipeline 7 on the high pressure oxygen-eliminating device 1, the one end and the high pressure oxygen-eliminating device 1 fixed connection of spare heating pipeline 7, the other end of spare heating pipeline 7 and the heating steam pipeline 4 fixed connection of screw generating set 5 input make spare heating pipeline 7 can regard as screw generating set 5's bypass, when making screw generating set 5 break down, high pressure oxygen-eliminating device 1 still can heat through spare heating pipeline 7 to improve the stability of system. The regulating valve 8 is arranged on the standby heating pipeline 7, and the regulating valve 8 can still realize the function of regulating the steam pressure when the standby heating pipeline 7 runs, so that the running reliability of the system is improved.

As shown in fig. 2 and 3, the screw generator set 5 includes a base 9 fixedly placed on the ground, a compressor 10 and a generator 11 are fixedly placed on the base 9, and a connecting mechanism 12 is provided between the compressor 10 and the generator 11. The steam drives the impeller in the compressor 10 to rotate, and the impeller drives the main shaft in the generator 11 to rotate through the connecting mechanism 12, so that energy conversion is realized. The connecting mechanism 12 comprises a first coupler 13 fixedly connected to the compressor 10, one end of the first coupler 13 far away from the compressor 10 is fixedly connected with a gear box 14, one end of the gear box 14 far away from the first coupler 13 is fixedly connected with a second coupler 15, and one end of the second coupler 15 far away from the gear box 14 is fixedly connected with a main shaft of the generator 11. The first coupler 13 and the second coupler 15 are both elastic laminated couplers, and the elastic laminated couplers have the capacity of absorbing axial misalignment, radial misalignment and angular misalignment, so that the first coupler 13 and the second coupler 15 can reliably run under various working conditions of the compressor 10.

As shown in fig. 3 and 5, the compressor 10 is provided with a gland cooling mechanism 16, and the gland cooling mechanism 16 is used for collecting leakage air at two ends of the compressor 10, and cooling the leaked steam to condensate water for recycling. The steam seal cooling mechanism 16 comprises gas leakage pipelines 17 fixedly connected to two ends of the compressor 10 along the length direction, one ends of the two gas leakage pipelines 17 far away from the compressor 10 are connected to form a shared pipe 18, one end of the shared pipe 18 far away from the compressor 10 is fixedly connected with a steam seal cooler 19 and is connected to the steam side of the steam seal cooler 19, an exhaust pipe 20 is fixedly connected to the steam seal cooler 19, the exhaust pipe 20 is communicated with the steam side of the steam seal cooler 19, an exhaust fan 21 is fixedly connected to the exhaust pipe 20, and an outlet of the exhaust fan 21 is communicated with the outside. And starting the exhaust fan 21, wherein the exhaust fan 21 pumps the interior of the steam seal cooler 19 into negative pressure, so that the air leakage pipelines 17 of the front and rear steam seals of the compressor 10 are slightly provided with negative pressure, the leaked steam continuously enters the steam seal cooler 19 through the air leakage pipelines 17, and simultaneously, the uncondensable air in the leaked steam is discharged to the atmosphere through the exhaust pipe 20 and the exhaust fan 21, so that the uncondensable gas in the steam is reduced. The steam seal cooler 19 is fixedly connected with a cooling water inlet pipe 22 and a cooling water outlet pipe 23, the cooling water inlet pipe 22 is used for supplying cooling water to the water side of the steam seal cooler 19, and the cooling water outlet pipe 23 is used for draining water on the water side of the steam seal cooler 19, so that steam is precooled and condensed into water, and the water is convenient for subsequent reuse.

As shown in fig. 3, the compressor 10 is provided with a lubricating oil mechanism 24, and the lubricating oil mechanism 24 is used for supplying lubricating oil to bearings at both ends of the compressor 10 and cooling the lubricating oil to realize the recycling of the lubricating oil. The lubricating oil mechanism 24 comprises an oil pipe 25 fixedly connected to bearings at two ends of the compressor 10, an oil tank is fixedly connected to one end of the oil pipe 25 far away from the compressor 10, and an oil pump 26 and an oil cooler 27 are arranged on the oil pipe 25. The oil pump 26 is started, the lubricating oil in the oil tank is guided into the bearings at the two ends of the compressor 10 by the oil pipe 25 for lubrication, the cooling and lubricating effects of the bearings are realized, the temperature of the lubricating oil rises after heat exchange is carried out, and the oil cooler 27 is used for cooling the lubricating oil, so that the lubricating oil can be recycled.

The compressor 10 and the generator 11 are two independent devices, the generated vibration is asynchronous, and the compressor 10 and the generator 11 are arranged on the same base 9, and the generated vibration can be mutually offset, so that the overall vibration level of the generator 11 and the compressor 10 is reduced.

The periphery of the compressor 10 and the generator 11 is covered with a protective cover 28, and the protective cover 28 covers the rotating parts of the compressor 10 and the generator 11, so that personnel and equipment are isolated, and the risk of injury of the personnel is reduced.

The working principle is as follows:

utilize screw generator set 5, replace governing valve 8 to heat steam pipeline 4's pressure regulation, realize retrieving the effect of steam pressure energy, simultaneously be used for the power generation with the steam energy of retrieving, realize the purpose of loss steam energy conversion for the high-quality energy, the utilization ratio of energy is improved, through adjusting stop valve 6, input steam volume and output steam volume through screw generator set 5 are controlled, simultaneously can also be through turn-off stop valve 6, realize screw generator set 5 the isolation on heating steam pipeline 4, thereby be convenient for subsequent maintenance and change.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a deaerator heating system with screw expander generating set, includes high pressure deaerator (1), be connected with booster pump (2) and feed pump (3) on high pressure deaerator (1), its characterized in that: be connected with heating steam pipeline (4) on high pressure oxygen-eliminating device (1), be equipped with screw generator set (5) on heating steam pipeline (4), the input and the output of screw generator set (5) all are equipped with stop valve (6).

2. The deaerator heating system with screw expander generator set of claim 1, wherein: the high-pressure deaerator is characterized in that a standby heating pipeline (7) is further arranged on the high-pressure deaerator (1), one end of the standby heating pipeline (7) is connected with the high-pressure deaerator (1), the other end of the standby heating pipeline (7) is connected with a heating steam pipeline (4) at the input end of the screw generator set (5), and a regulating valve (8) is arranged on the standby heating pipeline (7).

3. The deaerator heating system with screw expander generator set of claim 1, wherein: screw generating set (5) is including fixing base (9), fixed compressor (10) and the generator (11) of placing on base (9) subaerial, be equipped with coupling mechanism (12) between compressor (10) and generator (11), be equipped with vapor seal cooling body (16) and lubricating oil mechanism (24) on compressor (10).

4. The deaerator heating system with screw expander generator set of claim 3, wherein: the connecting mechanism (12) comprises a first coupler (13) arranged on the compressor (10), a second coupler (15) arranged on the generator (11), and a gear box (14) arranged between the first coupler (13) and the second coupler (15) and used for reducing speed.

5. The deaerator heating system with screw expander generator set of claim 3, wherein: steam seal cooling body (16) are including establishing gas leakage pipeline (17) at compressor (10) along length direction both ends, establishing steam seal cooler (19) of keeping away from compressor (10) one end in gas leakage pipeline (17), establishing exhaust tube (20) on steam seal cooler (19), establishing air exhauster (21) on exhaust tube (20), the export of air exhauster (21) communicates with each other with the external world, be equipped with cooling water import pipe (22) and cooling water outlet pipe (23) on steam seal cooler (19).

6. The deaerator heating system with screw expander generator set of claim 3, wherein: the lubricating oil mechanism (24) comprises oil pipes (25) arranged on bearings at two ends of the compressor (10), an oil tank arranged at one end of the oil pipe (25) far away from the compressor (10), an oil pump (26) arranged on the oil pipe (25) and an oil cooler (27).

7. The deaerator heating system with screw expander generator set of claim 3, wherein: the compressor (10) and the generator (11) are both arranged on the same base (9).

8. The deaerator heating system with screw expander generator set of claim 3, wherein: the peripheries of the compressor (10) and the generator (11) are covered with protective covers (28).