Steam supplementing system of water feeding pump turbine

Abstract

The utility model provides a steam supplementing system of a water feeding pump turbine, and relates to the technical field of coal-fired power generation. The steam supplementing system for the water-feeding pump turbine comprises a high-pressure steam supply assembly, the high-pressure steam supply assembly comprises a main steam path and a steam supplementing pipeline, the main steam path is connected with a first steam inlet of the water-feeding pump turbine, the steam supplementing pipeline is connected with a second steam inlet of the water-feeding pump turbine, and the high-pressure steam supply assembly conveys high-pressure steam to the water-feeding pump turbine through the main steam path and the steam supplementing pipeline; the low-pressure steam supply assembly is connected with a first steam inlet of the water feeding pump turbine through a first pipeline, and the low-pressure steam supply assembly conveys low-pressure steam to the water feeding pump turbine through the first pipeline; and the high-back-pressure condenser is connected with a steam exhaust port of the water feeding pump turbine and the heat supply network heat supply system, and heat supply network circulating water of the heat supply network heat supply system is heated by utilizing exhaust steam of the water feeding pump turbine. The problem that in the prior art, when exhaust steam of a water-feeding pump turbine participates in high-back-pressure heat supply, output of the water-feeding pump turbine is reduced is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal-fired power generation technical field, specifically, relate to a water pump steam turbine make-up system. BACKGROUND

[0002] With the continuous promotion of high back pressure heating technology of thermal power plant, more and more traditional medium pressure cylinder extraction heating unit and pure condensing heating technology begin to adopt high back pressure heating technology, on the one hand, high back pressure heating technology can recycle the exhaust steam waste heat of steam turbine, reduce the cold source loss of unit, effectively improve the heating capacity, further reduce the coal consumption of unit in heating state, so that the high back pressure heating modification technology of thermal power plant is more and more recognized by the industry, and becomes the important technical outlet for the effective development of energy saving and emission reduction of thermal power unit.

[0003] For the unit that the water pump steam turbine exhaust steam enters the main condenser or the main air cooling island of the power plant configuration, when the unit is through high back pressure heating modification, the water pump steam turbine exhaust steam needs to enter the heat supply network condenser for heat exchange in the heating period, therefore the back pressure of water pump steam turbine exhaust steam also needs to be increased, under the premise that the steam admission parameter of water pump steam turbine is same, the output of water pump steam turbine will decrease after the back pressure of steam turbine exhaust steam is increased.If the output of water pump steam turbine is maintained under the high back pressure operation state, then the steam admission parameter of water pump steam turbine needs to be improved (the steam admission pressure is improved or the steam admission amount is increased) or the through flow of water pump steam turbine is modified to adapt to the operation of water pump steam turbine under high back pressure state.

[0004] Therefore, a device is needed to solve at least one of the above problems. UTILITY MODEL CONTENT

[0005] The utility model embodiment aims at providing a water pump steam turbine make-up system, which is used to solve the problem that the output of water pump steam turbine decreases when the exhaust steam of water pump steam turbine participates in high back pressure heating in the prior art.

[0006] In order to achieve the above object, the utility model provides a water pump steam turbine make-up system, which is connected with a heat supply network heating system and a water pump steam turbine, the water pump steam turbine comprises a first nozzle chamber and a second nozzle chamber, and the water pump steam turbine make-up system comprises:

[0007] A high-pressure steam supply assembly comprises a main steam path and a make-up steam path, the main steam path is connected with a first steam inlet of the water pump steam turbine, the make-up steam path is connected with a second steam inlet of the water pump steam turbine, the high-pressure steam supply assembly delivers high-pressure steam to the water pump steam turbine through the main steam path and the make-up steam path, wherein the first steam inlet is communicated with the first nozzle chamber, and the second steam inlet is communicated with the second nozzle chamber;

[0008] The low-pressure steam supply assembly is connected with the first steam inlet of the feed water pump turbine through a first pipeline, and the low-pressure steam supply assembly supplies low-pressure steam to the feed water pump turbine through the first pipeline;

[0009] The high-back-pressure condenser is connected with the exhaust port of the feed water pump turbine and the heat supply system of the heat supply network, and is used for heating the heat supply network circulating water of the heat supply system by using the exhaust steam of the feed water pump turbine.

[0010] Specifically, the first nozzle chamber and the second nozzle chamber are independent of each other, and the volume of the first nozzle chamber is greater than that of the second nozzle chamber.

[0011] Specifically, the high-pressure steam supply assembly further comprises a high-pressure steam source and a joint throttle valve.

[0012] The high-pressure steam source is used for providing high-pressure steam.

[0013] The joint throttle valve is arranged at the first steam inlet of the feed water pump turbine, and the main steam path and the first pipeline are both connected with the first steam inlet of the feed water pump turbine through the joint throttle valve, and the joint throttle valve is used for controlling the flow of high-pressure steam or low-pressure steam entering the feed water pump turbine through the first steam inlet.

[0014] Specifically, the high-pressure steam supply assembly further comprises a first main steam valve arranged on the main steam path, which is used for controlling the flow state of high-pressure steam in the main steam path.

[0015] Specifically, the high-pressure steam supply assembly further comprises a supplementary steam main steam valve arranged on the supplementary steam pipeline, which is used for controlling the flow state of high-pressure steam in the supplementary steam pipeline.

[0016] Specifically, the high-pressure steam supply assembly further comprises a supplementary steam throttle valve arranged on the supplementary steam pipeline, which is used for controlling the flow of high-pressure steam entering the feed water pump turbine through the second steam inlet of the feed water pump turbine.

[0017] Specifically, the low-pressure steam supply assembly comprises a low-pressure steam source and a second main steam valve.

[0018] The low-pressure steam source is used for providing low-pressure steam.

[0019] The second main steam valve is arranged on the first pipeline, and is used for controlling the flow state of low-pressure steam in the first pipeline.

[0020] Specifically, the feed water pump turbine supplementary steam system further comprises that the low-pressure steam supply assembly further comprises a low-pressure supplementary steam pipeline connected with the steam outlet of the second main steam valve and the steam inlet of the supplementary steam throttle valve, and the low-pressure steam supply assembly supplies low-pressure steam to the feed water pump turbine through the second steam inlet through the low-pressure supplementary steam pipeline.

[0021] Specifically, a low-pressure supplementary steam main steam valve is arranged on the low-pressure supplementary steam pipeline, which is used for controlling the flow state of low-pressure steam in the low-pressure supplementary steam pipeline.

[0022] Specifically, the feed water pump turbine steam supplement system further comprises a pair of pressure detectors respectively arranged at the first steam inlet and the second steam inlet of the feed water pump turbine, and configured to detect the pressure of the steam flowing through the first steam inlet and the second steam inlet.

[0023] The feed water pump turbine steam supplement system provided by the utility model, through the low-pressure steam supply assembly, low-pressure steam is supplied to the feed water pump turbine, when the exhaust steam of the feed water pump turbine participates in high-back pressure heat supply, the high-pressure steam supply assembly is arranged to supply high-pressure steam to the feed water pump turbine, so as to make up for the insufficient steam supply output of the feed water pump turbine, the exhaust steam generated after the high-pressure steam and the low-pressure steam entering the feed water pump turbine drive the feed water pump turbine to work enters the high-back pressure condenser, the exhaust steam exchanges heat with the heat supply network circulating water entering the high-back pressure condenser in the high-back pressure condenser, the temperature of the heat supply network circulating water is increased after absorbing the waste heat of the exhaust steam, and the heat supply network circulating water after being heated enters the heat supply network system to be used for heat supply, the feed water pump turbine steam supplement system of the application solves the problem that the output of the feed water pump turbine is decreased when the exhaust steam of the feed water pump turbine participates in high-back pressure heat supply, fully utilizes the waste heat of the exhaust steam, and avoids energy waste.

[0024] Other features and advantages of the embodiments of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0025] The drawings are used to provide further understanding of the embodiments of the utility model and constitute a part of the specification, and are used to explain the embodiments of the utility model together with the following specific embodiment, but do not constitute limitations to the embodiments of the utility model.In the drawings,

[0026] Figure 1 It is the layout schematic diagram of the feed water pump turbine steam supplement system provided by the utility model embodiment;

[0027] Figure 2 It is Figure 1 The layout schematic diagram of different visual angles of the feed water pump turbine steam supplement system.

[0028] EXPLANATION OF REFERENCE NUMERALS

[0029] 1-feed water pump turbine;2-high-pressure steam supply assembly;3-high-back pressure condenser;4-joint control valve;5-steam supplement control valve;6-second main steam valve;7-first main steam valve;8-steam supplement main steam valve;9-low-pressure steam supply assembly;11-first nozzle chamber;12-second nozzle chamber;20-main steam path;21-steam supplement pipeline;22-high-pressure steam source;91-first pipeline;92-low-pressure steam source;93-low-pressure steam supplement pipeline;94-low-pressure steam supplement main steam valve. SPECIFIC EMBODIMENT

[0030] The specific implementation manners of the embodiments of the present application are described in detail below with reference to the drawings. It should be understood that the specific implementation manners described herein are only used for explaining and interpreting the embodiments of the present application, and are not used for limiting the embodiments of the present application.

[0031] Figure 1 is a layout schematic diagram of a feed water pump steam turbine supplementary steam system; Figure 2 is Figure 1 a layout schematic diagram of a feed water pump steam turbine supplementary steam system from different perspectives. As shown in Figures 1-2 The present application provides a feed water pump steam turbine supplementary steam system, which is connected with a heat supply network heating system and a feed water pump steam turbine 1. The feed water pump steam turbine 1 comprises a first nozzle chamber 11 and a second nozzle chamber 12. The feed water pump steam turbine supplementary steam system comprises:

[0032] a high-pressure steam supply assembly 2, which comprises a main steam path 20 and a supplementary steam path 21. The main steam path 20 is connected with a first steam inlet of the feed water pump steam turbine 1, and the supplementary steam path 21 is connected with a second steam inlet of the feed water pump steam turbine 1. The high-pressure steam supply assembly 2 delivers high-pressure steam to the feed water pump steam turbine 1 through the main steam path 20 and the supplementary steam path 21. The first steam inlet is communicated with the first nozzle chamber 11, and the second steam inlet is communicated with the second nozzle chamber 12.

[0033] a low-pressure steam supply assembly 9, which is connected with the first steam inlet of the feed water pump steam turbine 1 through a first pipeline 91. The low-pressure steam supply assembly 9 delivers low-pressure steam to the feed water pump steam turbine 1 through the first pipeline 91.

[0034] a high-back pressure condenser 3, which is connected with an exhaust port of the feed water pump steam turbine 1 and the heat supply network heating system. The high-back pressure condenser 3 is used for heating the heat supply network circulating water of the heat supply network heating system by using the exhaust steam of the feed water pump steam turbine 1.

[0035] The water pump steam turbine steam supplementing system provided by the utility model, low pressure steam supply assembly 9 supplies low pressure steam to water pump steam turbine 1 through first pipeline 91 and first steam inlet of water pump steam turbine 1, in order to avoid the insufficient output of water pump steam turbine 1 when the exhaust steam of water pump steam turbine 1 participates in high back pressure heat supply, high pressure steam supply assembly 2 is arranged, high pressure steam supply assembly 2 supplies high pressure steam to water pump steam turbine 1 through main steam path 20 and first steam inlet of water pump steam turbine 1, and high pressure steam can also be supplied to water pump steam turbine 1 through steam supplementing pipeline 21 and second steam inlet of water pump steam turbine 1, in this way, the high pressure steam supplied by high pressure steam supply assembly 2 changes the steam inlet parameter of the steam supplied to water pump steam turbine 1, improves the steam pressure entering water pump steam turbine 1, thereby avoiding the insufficient output of water pump steam turbine 1 when the exhaust steam of water pump steam turbine 1 participates in high back pressure heat supply, the exhaust steam of water pump steam turbine 1 enters high back pressure condenser 3, and the heat supply system of heat supply network also supplies heat supply network circulating water to high back pressure condenser 3, the heat supply network circulating water exchanges heat with the exhaust steam in high back pressure condenser 3, the heat supply network circulating water is heated after absorbing the waste heat of the exhaust steam, and the heated heat supply network circulating water returns to the heat supply system of heat supply network for heat supply, the water pump steam turbine steam supplementing system provided by the utility model solves the problem that the output of water pump steam turbine decreases when the exhaust steam of water pump steam turbine participates in high back pressure heat supply, fully utilizes the waste heat of the exhaust steam, avoids energy waste, high pressure steam has higher work capacity than low pressure steam, and low pressure steam should be used for the work requirement of water pump steam turbine in priority, when low pressure steam cannot meet the work requirement of water pump steam turbine, high pressure steam or high pressure steam and low pressure steam are used, steam energy is reasonably utilized, the overall economy is improved, meanwhile, the utility model does not need to reform the flow of water pump steam turbine 1, and waste is avoided.

[0036] In one embodiment, as Figure 2As shown, in order to ensure the smooth operation of the feed water pump turbine 1, the first nozzle chamber 11 and the second nozzle chamber 12 are independent of each other, and the volume of the first nozzle chamber 11 is greater than that of the second nozzle chamber 12. The first inlet port is communicated with the first nozzle chamber 11, so that the high-pressure steam or low-pressure steam can enter the feed water pump turbine 1 through the first inlet port and the first nozzle chamber 11. The second inlet port is communicated with the second nozzle chamber 12, and the high-pressure steam enters the feed water pump turbine 1 through the second inlet port and the second nozzle chamber 12. The high-pressure steam and the low-pressure steam are sent into the feed water pump turbine 1 through the first nozzle chamber 11 and the second nozzle chamber 12 which are independent of each other, so as to ensure the smooth operation of the feed water pump turbine 1. The first nozzle chamber 11 and the second nozzle chamber 12 are both provided with nozzles, and the steam entering the first nozzle chamber 11 and the steam entering the second nozzle chamber 12 are sprayed into the feed water pump turbine 1 through the nozzles. The volume of the first nozzle chamber 11 is greater than that of the second nozzle chamber 12, so that the amount of steam entering the feed water pump turbine 1 through the first nozzle chamber 11 is greater than that of steam entering the feed water pump turbine 1 through the second nozzle chamber 12.

[0037] In order to control the amount of low-pressure steam and high-pressure steam entering the feed water pump turbine 1 according to the actual needs of the feed water pump turbine 1, the high-pressure steam supply assembly 2 further comprises a high-pressure steam source 22 and a combined throttle valve 4.

[0038] The high-pressure steam source 22 is used to provide high-pressure steam.

[0039] The combined throttle valve 4 is arranged at the first inlet port of the feed water pump turbine 1, and the main steam path 20 and the first pipeline 91 are both connected with the first inlet port of the feed water pump turbine 1 through the combined throttle valve 4. The combined throttle valve 4 is used to control the flow of high-pressure steam or low-pressure steam entering the feed water pump turbine 1 through the first inlet port.

[0040] The high-pressure steam supply assembly 2 further comprises a first main steam valve 7 arranged on the main steam path 20, which is used to control the flow state of high-pressure steam in the main steam path 20.

[0041] The high-pressure steam supply assembly 2 further comprises a supplementary steam main steam valve 8 arranged on the supplementary steam pipeline 21, which is used to control the flow state of high-pressure steam in the supplementary steam pipeline 21.

[0042] The high-pressure steam supply assembly 2 further comprises a supplementary steam throttle valve 5 arranged on the supplementary steam pipeline 21, which is used to control the flow of high-pressure steam entering the feed water pump turbine 1 through the second inlet port of the feed water pump turbine 1.

[0043] The low-pressure steam supply assembly 9 comprises a low-pressure steam source 92 and a second main steam valve 6.

[0044] The low-pressure steam source 92 is used to provide low-pressure steam.

[0045] The second main steam valve 6 is arranged on the first pipeline 91 and is used to control the flow state of the low-pressure steam in the first pipeline 91.

[0046] The low-pressure steam supply assembly 9 further comprises a low-pressure supplementary steam pipeline 93 connected with the steam outlet of the second main steam valve 6 and the steam inlet of the supplementary steam control valve 5, and the low-pressure steam supply assembly 9 supplies the low-pressure steam to the feed water pump turbine 1 through the second steam inlet via the low-pressure supplementary steam pipeline 93.

[0047] A low-pressure supplementary steam main valve 94 is arranged on the low-pressure supplementary steam pipeline 93 and is used to control the flow state of the low-pressure steam in the low-pressure supplementary steam pipeline 93.

[0048] As shown in FIG. 1, the low-pressure steam supply assembly 9 comprises a first pipeline 91, a second pipeline 92, a second main steam valve 6, a supplementary steam control valve 5 and a low-pressure supplementary steam pipeline 93. Figure 1 and Figure 2As shown, high-pressure steam in high-pressure steam source 22 is used to supply feed water pump turbine 1, and low-pressure steam in low-pressure steam source 92 is also used to supply feed water pump turbine 1, and the high-pressure steam or low-pressure steam supplied to feed water pump turbine 1 is determined according to the working condition of feed water pump turbine 1, when the exhaust steam of feed water pump turbine 1 participates in high-back pressure heating in normal working condition, first main valve 7, supplementary steam main valve 8 and low-pressure supplementary steam main valve 94 are closed, second main valve 6 is opened, low-pressure steam source 92 supplies low-pressure steam to feed water pump turbine through first pipeline 91, the low-pressure steam flows to the first steam inlet of feed water pump turbine 1 through first pipeline 91, enters feed water pump turbine 1 after passing through first steam inlet and first nozzle chamber 11, and combined gate 4 arranged at first steam inlet can adjust the flow of low-pressure steam entering feed water pump turbine 1 through first steam inlet; when the exhaust steam of feed water pump turbine 1 participates in high-back pressure heating, with the further increase of load of feed water pump turbine 1, it is inevitable that the output of feed water pump turbine 1 will be insufficient with the increase of load, and at this time, the flow of low-pressure steam supplied to feed water pump turbine 1 by low-pressure steam source 92 through first pipeline 91 has reached the maximum, in order to improve the insufficient output of feed water pump turbine 1 in this state, the amount of low-pressure steam supplied to feed water pump turbine 1 can be increased, if the amount of low-pressure steam supplied to feed water pump turbine 1 is increased, second main valve 6 and low-pressure supplementary steam main valve 94 are opened, first main valve 7 and supplementary steam main valve 8 are closed, and low-pressure steam source 92 supplies low-pressure steam to feed water pump turbine 1 in two ways, one way is still to supply low-pressure steam to feed water pump turbine 1 through first pipeline 91, and the other way is to supply low-pressure steam to feed water pump turbine 1 through low-pressure supplementary steam pipeline 93, the low-pressure steam enters feed water pump turbine 1 through low-pressure supplementary steam pipeline 93, supplementary steam gate 5, second steam inlet and second nozzle chamber 12, the amount of low-pressure steam entering feed water pump turbine 1 is increased, and the steam parameters of steam entering feed water pump turbine 1 are also improved by increasing the amount of low-pressure steam of feed water pump turbine 1, thereby improving the insufficient output of feed water pump turbine 1;With the further increase of the load of the feed water pump turbine 1, and the steam volume of the low pressure steam supplemented in the second nozzle chamber 12 has reached the maximum steam flow, at this time, the problem of insufficient output of the feed water pump turbine 1 still cannot be overcome, the insufficient output of the feed water pump turbine 1 at this time can be solved by supplementing the feed water pump turbine 1 with high pressure steam, if the feed water pump turbine 1 is supplemented with high pressure steam, the first main steam valve 7 and the low pressure supplementary steam main steam valve 94 are closed, the supplementary steam main steam valve 8 and the second main steam valve 6 are opened, the low pressure steam source 92 continues to supply low pressure steam to the feed water pump turbine 1 through the first pipeline 91, at the same time, the high pressure steam in the high pressure steam source 22 flows to the second steam inlet of the feed water pump turbine 1 through the supplementary steam pipeline 21, and enters the feed water pump turbine 1 through the second steam inlet and the second nozzle chamber 12, the supplementary steam regulating valve 5 arranged on the supplementary steam pipeline 21 adjusts the flow of the high pressure steam entering the feed water pump turbine 1 through the second steam inlet, in this way, the pressure and the steam volume of the steam entering the feed water pump turbine 1 are improved by supplementing the feed water pump turbine 1 with high pressure steam through the supplementary steam pipeline 21, and the problem of insufficient output of the feed water pump turbine 1 is improved; With the further increase of the load of the feed water pump turbine 1, and the high pressure steam supplemented in the second nozzle chamber 12 has also reached the maximum steam flow, the problem of insufficient output of the feed water pump turbine 1 still cannot be overcome, the insufficient output of the feed water pump turbine 1 at this time can be solved by replacing the low pressure steam entering the first nozzle chamber 11 with high pressure steam, if at this time only the first nozzle chamber 11 needs to be supplied with high pressure steam and the second nozzle chamber 12 does not need to be supplied with high pressure steam, the insufficient output of the feed water pump turbine 1 can be solved, at this time, the first main steam valve 7 is opened, the second main steam valve 6, the supplementary steam main steam valve 8, and the low pressure supplementary steam main steam valve 94 are closed, and the supply of low pressure steam to the feed water pump turbine 1 is stopped, the feed water pump turbine 1 is supplied with high pressure steam through the high pressure steam source 22, the main steam pipeline 20, the first main steam valve 7, the combined regulating valve 4, the first steam inlet, and the first nozzle chamber 11, since high pressure steam is used, the steam inlet pressure and parameters of the feed water pump turbine 1 are improved, and the output of the feed water pump turbine 1 is further improved;With the further increase of the load of the feed water pump turbine 1, and the high pressure steam in the first nozzle chamber 11 has also reached the maximum steam flow, still can not overcome the problem of insufficient output of the feed water pump turbine 1, can solve the insufficient output of the feed water pump turbine 1 at this time by supplementing the feed water pump turbine 1 with high pressure steam, the first main valve 7 and the supplementary steam main valve 8 are opened, and the second main valve 6 and the low pressure supplementary steam main valve 94 are closed, at this time, stop supplying low pressure steam to the feed water pump turbine 1, supply high pressure steam to the feed water pump turbine 1 through the high pressure steam source 22 in two ways, one way of high pressure steam enters the feed water pump turbine 1 through the main steam path 20, the first main valve 7, the combined valve 4, the first steam inlet and the first nozzle chamber 11, the other way of high pressure steam enters the feed water pump turbine 1 through the supplementary steam pipeline 21, the supplementary steam main valve 8, the supplementary steam valve 5, the second steam inlet and the second nozzle chamber 12, the main steam path 20 and the supplementary steam pipeline 21 simultaneously deliver high pressure steam to the feed water pump turbine 1, increase the steam quantity of the high pressure steam entering the feed water pump turbine 1, improve the pressure and steam quantity of the steam entering the feed water pump turbine 1, make up for the problem of insufficient output of the feed water pump turbine 1 caused by the increased load of the feed water pump turbine 1 and the exhaust steam of the feed water pump turbine 1 participating in high back pressure heating, and avoid the output of the feed water pump turbine 1 from decreasing.

[0049] In order to facilitate the staff to know the pressure and flow of the steam entering the feed water pump turbine 1 through the first steam inlet and the second steam inlet, the feed water pump turbine supplementary steam system further comprises: a pair of pressure detectors arranged at the first steam inlet and the second steam inlet of the feed water pump turbine 1 respectively, for detecting the pressure of the steam flowing through the first steam inlet and the second steam inlet.

[0050] The feed water pump turbine supplementary steam system further comprises: a pair of flow detectors arranged at the first steam inlet and the second steam inlet of the feed water pump turbine 1 respectively, for detecting the flow of the steam flowing through the first steam inlet and the second steam inlet.

[0051] The feed water pump turbine supplementary steam system provided by the utility model supplies low pressure steam to the feed water pump turbine through the low pressure steam supply assembly, when the exhaust steam of the feed water pump turbine participates in high back pressure heating, supplies high pressure steam to the feed water pump turbine through the high pressure steam supply assembly, thereby making up for the insufficient output of the feed water pump turbine caused by the insufficient output of the feed water pump turbine, the high pressure steam and the low pressure steam entering the feed water pump turbine drive the feed water pump turbine to work, and the exhaust steam generated after the work enters the high back pressure condenser, the exhaust steam exchanges heat with the heating network circulating water entering the high back pressure condenser in the high back pressure condenser, the temperature of the heating network circulating water rises after absorbing the waste heat of the exhaust steam, and the heating network circulating water after the temperature rises enters the heating network heating system for heating, the feed water pump turbine supplementary steam system of the application solves the problem of the output of the feed water pump turbine decreasing when the exhaust steam of the feed water pump turbine participates in high back pressure heating in the prior art, fully utilizes the waste heat of the exhaust steam, and avoids energy waste.

[0052] The optional implementation manners of the embodiments of the present application are described in detail above in combination with the drawings, however, the embodiments of the present application are not limited to the specific details in the above implementation manners, and various simple modifications can be made to the technical scheme of the embodiments of the present application within the technical concept of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application.

[0053] In addition, it should be noted that each specific technical feature described in the above specific implementation manners can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the embodiments of the present application will not further describe various possible combination manners.

[0054] In addition, various different implementation manners of the embodiments of the present application can also be combined in any manner, as long as they do not deviate from the concept of the embodiments of the present application, and they should also be considered as disclosed contents of the embodiments of the present application.

Claims

1. A feed pump turbine supplementary steam system connected to a heat supply network and a feed pump turbine (1), the feed pump turbine (1) comprising a first nozzle chamber (11) and a second nozzle chamber (12), characterized in that, The feed water pump turbine steam supplement system comprises: A high-pressure steam supply assembly (2) comprising a main steam path (20) and a steam supplement path (21), the main steam path (20) being connected to a first steam inlet of the feed water pump turbine (1), the steam supplement path (21) being connected to a second steam inlet of the feed water pump turbine (1), the high-pressure steam supply assembly (2) delivering high-pressure steam to the feed water pump turbine (1) through the main steam path (20) and the steam supplement path (21), wherein the first steam inlet is in communication with the first nozzle chamber (11), and the second steam inlet is in communication with the second nozzle chamber (12); A low-pressure steam supply assembly (9) connected to the first steam inlet of the feed water pump turbine (1) through a first pipeline (91), the low-pressure steam supply assembly (9) delivering low-pressure steam to the feed water pump turbine (1) through the first pipeline (91); A high-back-pressure condenser (3) connected to an exhaust port of the feed water pump turbine (1) and a heat supply system, for heating heat supply circulating water of the heat supply system by using exhaust steam of the feed water pump turbine (1).

2. The feed pump turbine bleeder system as claimed in claim 1, wherein, The first nozzle chamber (11) and the second nozzle chamber (12) are independent of each other, and the volume of the first nozzle chamber (11) is greater than that of the second nozzle chamber (12).

3. The feed pump turbine bleeder system as claimed in claim 1, wherein, The high-pressure steam supply assembly (2) further comprises a high-pressure steam source (22) and a joint throttle valve (4). The high-pressure steam source (22) is configured to provide high-pressure steam. The joint throttle valve (4) is arranged at the first steam inlet of the feed water pump turbine (1), the main steam path (20) and the first pipeline (91) are both connected to the first steam inlet of the feed water pump turbine (1) through the joint throttle valve (4), and the joint throttle valve (4) is configured to control the flow of high-pressure steam or low-pressure steam entering the feed water pump turbine (1) through the first steam inlet.

4. The feed pump turbine bleeder system as claimed in claim 1, wherein, The high-pressure steam supply assembly (2) further comprises a first main steam valve (7) arranged on the main steam path (20) and configured to control the flow state of high-pressure steam in the main steam path (20).

5. The feed pump turbine bleeder system as claimed in claim 1, wherein, The high-pressure steam supply assembly (2) further comprises a steam supplement main steam valve (8) arranged on the steam supplement path (21) and configured to control the flow state of high-pressure steam in the steam supplement path (21).

6. The feed pump turbine bleeder system as claimed in claim 1, wherein, The high-pressure steam supply assembly (2) further comprises a steam supplement throttle valve (5) arranged on the steam supplement path (21) and configured to control the flow of high-pressure steam entering the feed water pump turbine (1) through the second steam inlet of the feed water pump turbine (1).

7. The feed pump turbine bleeder system as claimed in claim 6, wherein, The low-pressure steam supply assembly (9) comprises a low-pressure steam source (92) and a second main steam valve (6). The low-pressure steam source (92) is configured to provide low-pressure steam. The second main steam valve (6) is arranged on the first pipeline (91) and configured to control the flow state of low-pressure steam in the first pipeline (91).

8. The feed pump turbine bleeder system as claimed in claim 7, wherein, The low-pressure steam supply assembly (9) further comprises a low-pressure steam supplement path (93) connected to an exhaust port of the second main steam valve (6) and a steam inlet of the steam supplement throttle valve (5), and the low-pressure steam supply assembly (9) delivers low-pressure steam to the feed water pump turbine (1) through the second steam inlet through the low-pressure steam supplement path (93).

9. The feed pump turbine bleeder system according to claim 8, wherein, A low-pressure steam supplement main steam valve (94) is arranged on the low-pressure steam supplement path (93) and configured to control the flow state of low-pressure steam in the low-pressure steam supplement path (93).

10. The feed pump turbine bleeder system as claimed in claim 1, wherein, The feed water pump turbine steam supplement system further comprises a pair of pressure detectors respectively arranged at the first steam inlet and the second steam inlet of the feed water pump turbine (1) and used for detecting the pressure of the steam flowing through the first steam inlet and the second steam inlet.

Images