Saturated steam (supplying) supplementing system applied to steam supplementing type steam turbine

Abstract

The saturated steam (supplying) supplementing system comprises a main steam pipeline, a steam supplementing pipeline, a condenser and a steam turbine generator, and a main steam-water separator front shut-off valve, a main steam-water separator, a main steam valve and a regulating valve are sequentially arranged on the main steam pipeline. The saturated steam (supplying) supplementing system applied to the steam supplementing type steam turbine can meet the utilization requirement of saturated steam, is suitable for occasions without superheated steam in a plant, can utilize two saturated sources with different pressure grades to generate power, can better recycle the saturated steam, can reduce the probability that the steam carries water, improves the operation safety of a unit, and is suitable for popularization and application. The steam water carrying rate is reduced, the dryness of the saturated steam is improved, the applicability of the saturated steam to a generator set is improved, the influence on the steam source side is reduced, the air exhaust valves and pipelines are arranged on the steam supply pipeline and the steam supplement pipeline, and normal work of the steam source side is not influenced when the steam turbine operates to adjust loads and suddenly change the loads.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine (supply) supplementary steam, and in particular to a saturated steam (supply) supplementary steam system applied to a supplementary steam turbine. Background Art

[0002] Industrial production is often accompanied by the output of low-quality steam. The supplementary steam turbine can recycle this low-quality steam to avoid energy waste. However, due to the safety requirements of the steam turbine, low-quality steam also needs to have a certain degree of superheat before it can enter the steam turbine to generate electricity. After development, the main steam source is superheated steam, and the supplementary steam source is saturated steam. The utilization is also in its infancy, but the technology of simply using saturated steam to generate electricity (both the main and supplementary steam sources are saturated steam) still needs to be solved.

[0003] To this end, the present invention is a saturated steam (supply) supplementary steam system applied to a supplementary steam turbine. A steam-water separation device is installed in the saturated steam pipeline to separate the condensate in the saturated steam from the steam, and the saturated steam quality is improved before it enters the steam turbine for power generation, which can reduce the operating risk of the steam turbine blades, improve the safety of the steam turbine, and well recover the saturated steam energy. Summary of the invention

[0004] The object of the present invention is to provide a saturated steam (supply) supplementary steam system for a supplementary steam turbine in view of the deficiencies of the prior art, so as to solve the problems raised in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a saturated steam supplementary steam system applied to a supplementary steam turbine, comprising a main steam pipeline, a supplementary steam pipeline, a condenser and a steam turbine generator, wherein the main steam pipeline is provided with a main steam steam-water separator front shut-off valve, a main steam steam-water separator, a main steam valve and a regulating valve in sequence;

[0006] The supplementary steam pipeline is provided with a supplementary steam-water separator front shut-off valve, a supplementary steam-water separator and a supplementary steam-water separator rear shut-off valve in sequence;

[0007] The main steam pipeline and the supplementary steam pipeline are both provided with bypasses, and the bypasses provided on the main steam pipeline and the supplementary steam pipeline are both connected with the condenser.

[0008] As a preferred technical solution of the present invention, a main steam exhaust pipeline regulating valve is also provided on the main steam pipeline, and the main steam exhaust pipeline regulating valve can regulate the steam in the main steam pipeline.

[0009] As a preferred technical solution of the present invention, the bypass arranged on the main steam pipeline is located between the main steam water separator and the main steam valve, and a high bypass valve is also installed on the bypass arranged on the main steam pipeline.

[0010] As a preferred technical solution of the present invention, a supplementary steam exhaust pipeline regulating valve is further provided on the supplementary steam pipeline, and the supplementary steam exhaust pipeline regulating valve regulates the steam in the supplementary steam pipeline.

[0011] As a preferred technical solution of the present invention, a supplementary steam bypass valve is installed on the bypass provided on the supplementary steam pipeline at a position between the supplementary steam-water separator and the shut-off valve after the supplementary steam-water separator.

[0012] As a preferred technical solution of the present invention, the regulating valve is a turbine body valve, and the condenser is connected to the steam turbine generator.

[0013] As a preferred technical solution of the present invention, the main steam pipeline is connected to the steam turbine generator, and the supplementary steam pipeline is also connected to the steam turbine generator.

[0014] Compared with the prior art, the present invention provides a saturated steam (supply) supplementary steam system applied to a supplementary steam turbine, which has the following beneficial effects:

[0015] 1. The saturated steam (supply) supplementary steam system applied to the supplementary steam turbine can meet the utilization demand of saturated steam. The present invention is suitable for occasions without superheated steam in the factory. Two saturated steam sources with different pressure levels can be used for power generation, and the saturated steam can be better recycled and utilized;

[0016] 2. The saturated steam (supply) supplementary steam system applied to the supplementary steam turbine can reduce the probability of steam carrying water and improve the operating safety of the unit. The present invention reduces the steam carrying water rate, increases the saturated steam dryness, and improves the applicability of saturated steam to the generator set;

[0017] 3. The saturated steam (supply) supplementary steam system applied to the supplementary steam turbine reduces the impact on the steam source side. The supply and supplementary steam pipelines of the present invention are both provided with exhaust valves and pipelines. When the steam turbine is running to adjust the load or suddenly change the load, the normal operation of the steam source side is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The diagram is a saturated steam supplementation system diagram of the supplementation type steam turbine of the present invention.

[0019] Figure numerals: 1. main steam pipeline; 2. main steam exhaust pipeline regulating valve; 3. main steam steam-water separator front shut-off valve; 4. main steam steam-water separator; 5. high bypass valve; 6. main steam valve; 7. regulating valve; 8. supplementary steam pipeline; 9. supplementary steam exhaust pipeline regulating valve; 10. supplementary steam steam-water separator front shut-off valve; 11. supplementary steam steam-water separator; 12. supplementary steam bypass valve; 13. supplementary steam steam-water separator rear shut-off valve; 14. steam turbine generator; 15. condenser. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 In this embodiment: a saturated steam supply and supplementary steam system for a supplementary steam turbine comprises a main steam pipeline 1, a supplementary steam pipeline 8, a condenser 15 and a steam turbine generator 14. The main steam pipeline 1 is provided with a main steam water separator front shut-off valve 3, a main steam water separator 4, a main steam valve 6 and a regulating valve 7 in sequence. The steam source in the main steam pipeline 1 is high-pressure saturated steam. The main steam pipeline 1 of the steam turbine generator 14 uses high-pressure saturated steam. The main steam pipeline 1 can enter the main steam water separator 4 through the main steam water separator front shut-off valve 3, and can enter the steam turbine generator 14 through the main steam valve 6 and the regulating valve 7.

[0022] The supplementary steam pipeline 8 is provided with a supplementary steam-water separator front shut-off valve 10, a supplementary steam-water separator 11 and a supplementary steam-water separator rear shut-off valve 13 in sequence. The steam source in the supplementary steam pipeline 8 is also high-pressure saturated steam. The supplementary steam pipeline 8 of the steam turbine generator 14 uses low-pressure saturated steam. The supplementary steam pipeline 8 can enter the supplementary steam-water separator 11 through the supplementary steam-water separator front shut-off valve 10, and can enter the steam turbine generator 14 through the supplementary steam-water separator rear shut-off valve 13.

[0023] Bypasses are provided on the main steam pipeline 1 and the supplementary steam pipeline 8, and the bypasses provided on the main steam pipeline 1 and the supplementary steam pipeline 8 are both connected to the condenser 15. When the steam source in the main steam pipeline 1 or the supplementary steam pipeline 8 does not meet the operation requirements of the steam turbine generator 14 or when the steam turbine generator 14 unit is started, saturated steam is discharged into the unit condenser 15 through the supplementary steam bypass valve 12 installed on the bypass provided on the supplementary steam pipeline 8 or the high bypass valve 5 installed on the bypass provided on the main steam pipeline 1. When the steam turbine generator 14 is shut down due to an accident, the main steam exhaust pipeline regulating valve 2 and the supplementary steam exhaust pipeline regulating valve 9 are opened and can discharge steam, thereby ensuring that the normal operation of the industrial production process on the steam source side is not affected.

[0024] In this embodiment, a main steam exhaust pipeline regulating valve 2 is further provided on the main steam pipeline 1, and the main steam exhaust pipeline regulating valve 2 can regulate the steam in the main steam pipeline 1. The bypass provided on the main steam pipeline 1 is located between the main steam steam-water separator 4 and the main steam valve 6. The main steam steam-water separator 4 is used to improve the steam quality in the main steam pipeline 1. A high bypass valve 5 is also installed on the bypass provided on the main steam pipeline 1. A supplementary steam exhaust pipeline regulating valve 9 is also provided on the supplementary steam pipeline 8. The supplementary steam exhaust pipeline regulating valve 9 is provided on the supplementary steam pipeline. The steam in the supplementary steam pipe 8 is regulated. The supplementary steam-water separator 11 is arranged on the bypass position on the supplementary steam pipe 8 and is located between the supplementary steam-water separator 11 and the shut-off valve 13 after the supplementary steam-water separator. The supplementary steam-water separator 11 is used to improve the steam quality in the supplementary steam pipe 8. A supplementary steam bypass valve 12 is also installed on the bypass arranged on the supplementary steam pipe 8. The regulating valve 7 is a steam turbine body valve. The condenser 15 is connected to the steam turbine generator 14. The main steam pipe 1 is connected to the steam turbine generator 14. The supplementary steam pipe 8 is also connected to the steam turbine generator 14.

[0025] The working principle and use process of the present invention are as follows: the saturated steam supply and supplementary steam system applied to the supplementary steam turbine, the main steam and supplementary steam sources used are saturated steam, the main steam pipeline 1 is equipped with a main steam steam-water separator 4, and the supplementary steam pipeline 8 is equipped with a supplementary steam-water separator 11. The main steam steam-water separator 4 is used to improve the steam quality in the main steam pipeline 1, and the supplementary steam steam-water separator 11 is used to improve the steam quality in the supplementary steam pipeline 8, so that the saturated steam can be used for power generation, and an emptying and bypass system is provided to improve the safety of the steam turbine generator 14 unit while ensuring that the industrial production on the steam source side is not affected;

[0026] The saturated steam system of the steam-assisted steam turbine is shown below (refer to Figure 1 ):

[0027] The first part is the main steam pipeline 1: the main steam pipeline 1 of the steam turbine generator 14 uses high-pressure saturated steam. The main steam pipeline 1 passes through the shut-off valve 3 before the main steam steam-water separator, can enter the main steam steam-water separator 4, and can then pass through the main steam valve 6 and the regulating valve 7 to enter the steam turbine generator 14.

[0028] The second part is the supplementary steam pipeline 8: the supplementary steam pipeline 8 of the steam turbine generator 14 uses low-pressure saturated steam. The supplementary steam pipeline 8 can enter the supplementary steam-water separator 11 through the supplementary steam-water separator front shut-off valve 10, and then enter the steam turbine generator 14 through the supplementary steam-water separator rear shut-off valve 13.

[0029] The third part is the bypass and exhaust of the main steam pipeline 1 and the supplementary steam pipeline 8: when the steam source in the main steam pipeline 1 or the supplementary steam pipeline 8 does not meet the operation requirements of the steam turbine generator 14 or when the steam turbine generator 14 unit is started, the saturated steam is discharged into the unit condenser 15 through the supplementary steam bypass valve 12 installed on the bypass provided on the supplementary steam pipeline 8 or the high bypass valve 5 installed on the bypass provided on the main steam pipeline 1. When the steam turbine generator 14 is shut down due to an accident, the main steam exhaust pipeline regulating valve 2 and the supplementary steam exhaust pipeline regulating valve 9 are opened and can discharge steam, which can ensure that the normal operation of the industrial production process on the steam source side is not affected.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A saturated steam (supply) supplementary steam system for a supplementary steam turbine, comprising a main steam pipeline (1), a supplementary steam pipeline (8), a condenser (15) and a steam turbine generator (14), characterized in that: The main steam pipeline (1) is provided with a main steam water separator front shut-off valve (3), a main steam water separator (4), a main steam valve (6) and a regulating valve (7) in sequence; The supplementary steam pipeline (8) is provided with a supplementary steam-water separator front shut-off valve (10), a supplementary steam-water separator (11) and a supplementary steam-water separator rear shut-off valve (13) in sequence; The main steam pipeline (1) and the supplementary steam pipeline (8) are both provided with bypasses, and the bypasses provided on the main steam pipeline (1) and the supplementary steam pipeline (8) are both connected to the condenser (15).

2. A saturated steam (supply) supplementary steam system for a supplementary steam turbine according to claim 1, characterized in that: The main steam pipeline (1) is also provided with a main steam exhaust pipeline regulating valve (2), and the main steam exhaust pipeline regulating valve (2) can regulate the steam in the main steam pipeline (1).

3. A saturated steam (supply) supplementary steam system for a supplementary steam turbine according to claim 1, characterized in that: The bypass arranged on the main steam pipeline (1) is located between the main steam water separator (4) and the main steam valve (6), and a high bypass valve (5) is also installed on the bypass arranged on the main steam pipeline (1).

4. A saturated steam (supply) supplementary steam system for a supplementary steam turbine according to claim 1, characterized in that: The supplementary steam pipeline (8) is also provided with a supplementary steam exhaust pipeline regulating valve (9), and the supplementary steam exhaust pipeline regulating valve (9) regulates the steam in the supplementary steam pipeline (8).

5. The saturated steam (supply) supplementary steam system for a supplementary steam turbine according to claim 1, characterized in that: A supplementary steam bypass valve (12) is also installed on the bypass provided on the supplementary steam pipeline (8) at a position between the supplementary steam-water separator (11) and the shut-off valve (13) after the supplementary steam-water separator.

6. A saturated steam (supply) supplementary steam system for a supplementary steam turbine according to claim 1, characterized in that: The regulating valve (7) is a steam turbine body valve, and the condenser (15) is connected to the steam turbine generator (14).

7. A saturated steam (supply) supplementary steam system for a supplementary steam turbine according to claim 1, characterized in that: The main steam pipeline (1) is connected to the steam turbine generator (14), and the supplementary steam pipeline (8) is also connected to the steam turbine generator (14).

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