System and method for improving heating capacity of heating unit

Abstract

The present invention discloses a system for improving the heating capacity of a heating unit, which includes a steam turbine generator set, a heater, a heat user, a heating component, and a first branch. The steam turbine generator set includes a main body, a boiler, and an economizer connected in sequence. The boiler is used to heat the main body, and the economizer is used to recover the waste heat of the exhaust gas from the boiler. The main body has an air outlet, and the heater is connected to the air outlet and the heat user. The steam turbine generator set passes exhaust steam into the heater through the air outlet to heat water in the heater. The heated water is used to provide heat to the heat user. The heating component includes a heating element and a water storage tank. The water storage tank can be connected to the heat user and supply heat to the heat user through the heated water. The first branch and the economizer are arranged in parallel. The economizer can be connected to the heat user to use the waste heat in the economizer to provide heat to the heat user. The system for improving the heating capacity of the heating unit according to the embodiment of the present invention has high application stability, small modification scope, and high operational reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of steam turbine heating, and in particular to a system and method for improving the heating capacity of a heating unit. Background Art

[0002] Heating is a vital public welfare project. With urban development and improved living conditions, the area covered by heating has increased annually, leading to a growing demand for heat. However, the heating capacity of thermal power plants has reached its maximum, and in some areas, there's even a risk that heating temperatures won't meet minimum requirements. Summary of the Invention

[0003] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a system for improving the heating capacity of a heating unit, which has high application stability, a small scope for modification, low investment cost, high economic efficiency, and high operational reliability.

[0004] The system for improving the heating capacity of a heating unit according to an embodiment of the present invention includes:

[0005] A steam turbine generator set, comprising a main body, a boiler, and an economizer connected in sequence, wherein the boiler is used to supply heat to the main body, the economizer is used to recover waste heat from exhaust gas from the boiler, and the main body has an air outlet;

[0006] a heater and a heat user, wherein the heater contains water and is in communication with the air outlet and the heat user; the steam turbine generator set passes extraction steam into the heater through the air outlet to heat the water in the heater; and the heated water is used to provide heat for the heat user;

[0007] A heating component, the heating component comprising a heating element and a water storage tank, the heating element being connected to the water storage tank to heat the water in the water storage tank, the water storage tank being connectable to the heat user and supplying heat to the heat user through the heated water;

[0008] The first branch, one end of the first branch is connected to the main body, the other end of the first branch is located between the boiler and the economizer, the first branch and the economizer are arranged in parallel, and the economizer can be connected to the heat user to utilize the waste heat in the economizer to supply heat to the heat user.

[0009] The system for improving the heating capacity of a heating unit according to an embodiment of the present invention is as follows: during conventional heating in winter, the boiler provides heat to the main body, and the main body then passes the internal extraction steam into the heater through the air outlet to heat the water in the heater, and the water in the heater flows into the heat user to provide heat to the heat user; during deep peak-shaving heating conditions, the heating element is started to heat the water in the water tank so that the water in the water tank can provide heat to the heat user, thereby enabling the heating component and the steam turbine generator set to jointly provide heat to the heat user, thereby further improving the heating capacity of the system for improving the heating capacity of a heating unit according to an embodiment of the present invention; when the heating component and the steam turbine generator set jointly provide heat to the heat user but still cannot meet the demand of the heat user, the first branch is opened and the economizer is short-circuited so that the economizer can provide heat to the heat user, thereby enabling the economizer, the heating component and the steam turbine generator set to jointly provide heat to the heat user, further realizing the heating capacity of the system for improving the heating capacity of a heating unit according to an embodiment of the present invention, improving the economic benefits of the enterprise, reducing the scope of transformation, and saving transformation costs.

[0010] In some embodiments, the water tank has a water outlet and a water inlet, both of which are connected to the heat user. The hot water in the water tank enters the heat user through the water outlet to provide heat to the heat user, and the heated water then flows back to the water tank through the water inlet.

[0011] In some embodiments, the heating component also includes a second branch, a third branch and a first pump. The second branch and the third branch connect the water tank and the heat user. The first pump is arranged on the second branch. The first pump is used to pass the water in the water tank into the heat user to provide heat to the heat user. The cooled water then flows back to the water tank through the third branch.

[0012] In some embodiments, the heater has a first channel and a second channel, the first channel is connected to the air outlet, the second channel is connected to the heat user, there is circulating water in the second channel, and the extraction steam in the first channel performs heat exchange with the circulating water in the second channel.

[0013] In some embodiments, the system for improving the heating capacity of the heating unit also includes a first pipeline, a second pipeline and a second pump. The first pipeline and the second pipeline connect the heat user and the second channel. The second pump is arranged on the first pipeline. The second pump is used to pump the circulating water in the second channel into the heat user to provide heat to the heat user. The cooled circulating water then flows back to the second channel through the second pipeline.

[0014] In some embodiments, the economizer has a third channel and a fourth channel, the third channel connects the boiler and the main body so that the flue gas exhausted by the boiler can enter the third channel, and the system for improving the heating capacity of the heating unit also includes a third pipeline and a fourth pipeline, the third pipeline connects the first pipeline and the fourth channel, the fourth pipeline connects the second pipeline and the fourth channel, part of the circulating water in the second pipeline can enter the fourth channel through the fourth pipeline, the extraction steam in the third channel can heat part of the circulating water in the fourth channel, and the heated circulating water flows back to the first pipeline through the third pipeline.

[0015] In some embodiments, the system for improving the heating capacity of the heating unit further includes:

[0016] a first valve, which is provided on the first pipeline and is used to control the closing of the first pipeline. The first valve is located between the heat user and the second pump, and the connection between the third pipeline and the first pipeline is located between the first valve and the second pump;

[0017] a second valve, the second valve being provided on the second pipeline and being used to control the closing of the second pipeline, wherein the connection between the fourth pipeline and the second pipeline is located between the second valve and the heat user;

[0018] a third valve, the third valve being provided on the third pipeline and being used to control the closing of the third pipeline;

[0019] A fourth valve is provided on the fourth pipeline, and is used to control the closing of the fourth pipeline.

[0020] In some embodiments, the system for improving the heating capacity of the heating unit further includes:

[0021] a fifth pipeline and a fifth valve, wherein the fifth pipeline is connected to the main body and the third channel, and the fifth valve is provided on the fifth pipeline and is used to control the closing of the fifth pipeline;

[0022] a sixth pipeline and a sixth valve, wherein the sixth pipeline is connected to the third channel and the boiler, and the sixth valve is provided on the sixth pipeline and is used to control the closing of the sixth pipeline;

[0023] A seventh valve is provided on the first branch, and is used to control the closing of the first branch.

[0024] In some embodiments, the heating component further includes a high-voltage transformer, which connects the main body and the heating element to supply power to the heating element.

[0025] The method for improving the heating capacity of a heating unit according to an embodiment of the present invention is characterized in that:

[0026] When the heat load is low in winter heating conditions, the first valve and the second valve are opened to supply heat to heat users through the steam turbine generator set;

[0027] During deep peak-shaving heating, the heating component and the steam turbine generator set simultaneously supply heat to the heat user;

[0028] When the maximum heating condition is reached, the third valve, the fourth valve and the seventh valve are opened, the fifth valve and the sixth valve are closed, and the economizer, the steam turbine generator set and the heating component simultaneously supply heat to the heat user.

[0029] The method of the system for improving the heating capacity of a heating unit according to an embodiment of the present invention is as follows: when the heat load is low in winter heating conditions, the first valve and the second valve are opened so that the main body can pass the internal extraction steam into the heater through the air outlet to heat the water in the heater, and the water in the heater flows into the heat user to provide heat to the heat user; during deep peak-shaving heating, the heating component and the steam turbine generator set jointly provide heat to the heat user; when the heating component and the steam turbine generator set jointly provide heat to the heat user but still cannot meet the needs of the heat user, the third valve, the fourth valve and the seventh valve are opened, and the fifth valve and the sixth valve are closed to short-circuit the economizer, so that the economizer can provide heat to the heat user, thereby allowing the economizer, the heating component and the steam turbine generator set to jointly provide heat to the heat user. Therefore, not only can the heating capacity of the system for improving the heating capacity of a heating unit according to the embodiment of the present invention be improved, but the operation is also simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 2 is a schematic diagram of a system for improving the heating capacity of a heating unit according to an embodiment of the present invention.

[0031] Figure 2 3 is a schematic diagram of the main body of a system for improving the heating capacity of a heating unit according to an embodiment of the present invention.

[0032] Reference numerals: 1, steam turbine generator set; 11, body; 111, air outlet; 112, generator; 113, high-pressure cylinder; 114, medium-pressure cylinder; 115, low-pressure cylinder; 116, low-pressure heater; 117, high-pressure heater; 1181, fourth branch; 1182, fifth branch; 1183, first butterfly valve; 1184, second butterfly valve; 12, boiler; 13, economizer; 2, heater; 3, heat user; 4, heating component; 41, heating element; 42 , water tank; 421, water outlet; 422, water inlet; 43, second branch; 44, third branch; 45, first pump; 46, high-voltage transformer; 5, first branch; 61, first pipeline; 62, second pipeline; 63, third pipeline; 64, fourth pipeline; 65, fifth pipeline; 66, sixth pipeline; 67, second pump; 71, first valve; 72, second valve; 73, third valve; 74, fourth valve; 75, fifth valve; 76, sixth valve; 77, seventh valve. DETAILED DESCRIPTION

[0033] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0034] like Figure 1-2 As shown, the system for improving the heating capacity of a heating unit according to an embodiment of the present invention includes a steam turbine generator set 1 , a heater 2 , a heat user 3 , a heating component 4 and a first branch 5 .

[0035] The steam turbine generator set 1 comprises a main body 11, a boiler 12 and an economizer 13 connected in sequence. The boiler 12 is used to provide heat for the main body 11, and the economizer 13 is used to recover waste heat from exhaust gas of the boiler 12. The main body 11 has an air outlet 111.

[0036] There is water in the heater 2, which is connected to the air outlet 111 and the heat user 3. The steam turbine generator set 1 introduces extraction steam into the heater 2 through the air outlet 111 to heat the water in the heater 2. The heated water is used to provide heat for the heat user 3.

[0037] The heating assembly 4 includes a heating element 41 and a water tank 42. The heating element 41 is connected to the water tank 42 to heat the water in the water tank 42. The water tank 42 can be connected to the heat user 3 and supply heat to the heat user 3 through the heated water. Specifically, the heating element 41 is an electric boiler 12.

[0038] One end of the first branch 5 is connected to the main body 11, and the other end of the first branch 5 is located between the boiler 12 and the economizer 13. The first branch 5 and the economizer 13 are arranged in parallel. The economizer 13 can be connected to the heat user 3 to utilize the waste heat in the economizer 13 to supply heat to the heat user 3.

[0039] In the system for improving the heating capacity of the heating unit according to the embodiment of the present invention, during conventional heating in winter, the boiler 12 provides heat for the main body 11, and the main body 11 then passes the internal extraction steam into the heater 2 through the air outlet 111 to heat the water in the heater 2, and the water in the heater 2 flows into the heat user 3 to provide heat for the heat user 3.

[0040] During the deep peak-shaving heating condition, the heating element 41 is started to heat the water in the water tank 42 so that the water in the water tank 42 can provide heat to the heat user 3, thereby realizing that the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3, so as to further improve the heating capacity of the system for improving the heating capacity of the heating unit in the embodiment of the present invention.

[0041] When the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3 but still cannot meet the demand of the heat user 3, the first branch 5 is opened and the economizer 13 is short-circuited so that the economizer 13 can provide heat to the heat user 3, thereby realizing that the economizer 13, the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3, and further realizing the heating capacity of the system for improving the heating capacity of the heating unit in the embodiment of the present invention, improving the economic benefits of the enterprise, reducing the scope of transformation, and saving transformation costs.

[0042] In some embodiments, the main body 11 includes a generator 112, a high-pressure cylinder 113, an intermediate-pressure cylinder 114, a low-pressure cylinder 115, a low-pressure heater 116, and a high-pressure heater 117. The boiler 12, the high-pressure cylinder 113, the intermediate-pressure cylinder 114, the low-pressure cylinder 115, the low-pressure heater 116, the high-pressure heater 117, and the economizer 13 are sequentially connected. The low-pressure heater 116 is connected to the low-pressure cylinder 115, and the high-pressure heater 117 is connected to the high-pressure cylinder 113. The generator 112 is connected to the low-pressure cylinder 115.

[0043] The main body 11 also includes a fourth branch 1181, a fifth branch 1182, a first butterfly valve 1183, and a second butterfly valve 1184. The fourth branch 1181 connects the intermediate-pressure cylinder 114 and the low-pressure cylinder 115, with the gas outlet 111 located on the fourth branch 1181. The fifth branch 1182 connects the gas outlet 111 and the heater 2. The first butterfly valve 1183 is located on the fourth branch 1181 and is located between the gas outlet 111 and the intermediate-pressure cylinder 114. The second butterfly valve 1184 is located on the fifth branch 1182. During conventional winter heating, the first and second butterfly valves 1183, 1184 are opened to allow some of the extracted steam in the fourth branch 1181 to enter the fifth branch 1182 through the gas outlet 111.

[0044] In some embodiments, the water tank 42 has a water outlet 421 and a water inlet 422, both of which are connected to the heat user 3. The hot water in the water tank 42 enters the heat user 3 through the water outlet 421 to provide heat for the heat user 3, and the heated water then flows back to the water tank 42 through the water inlet 422.

[0045] Specifically, during the deep peak-shaving heating condition, the heating element 41 is started to heat the water in the water tank 42. The hot water in the water tank 42 enters the heat user 3 through the water outlet 421 to provide heat to the heat user 3. After the heating is completed, the temperature of the hot water decreases, and the low-temperature water enters the water tank 42 through the water inlet 422 and is heated by the heating element 41. As a result, the hot water in the water tank 42 can circulate between the water tank 42 and the heat user 3, continuously providing heat to the heat user 3, effectively improving the heating effect of the heating component 4 on the heat user 3.

[0046] In some embodiments, the heating component 4 also includes a second branch 43, a third branch 44 and a first pump 45. The second branch 43 and the third branch 44 connect the water tank 42 and the heat user 3. The first pump 45 is arranged on the second branch 43. The first pump 45 is used to pass the water in the water tank 42 into the heat user 3 to provide heat to the heat user 3. The cooled water then flows back to the water tank 42 through the third branch 44.

[0047] Specifically, one end of the second branch 43 is connected to the water outlet 421, and the other end of the second branch 43 is connected to the heat user 3, so that the hot water in the water tank 42 can flow into the heat user 3 through the second branch 43. One end of the third branch 44 is connected to the water inlet 422, and the other end of the third branch 44 is connected to the heat user 3, so that the water after heat exchange can flow back into the water tank 42 through the third branch 44. A first pump 45 is provided on the second branch 43 to quickly pass the water in the water tank 42 into the heat user 3, further improving the heating effect of the heating component 4 on the heat user 3.

[0048] In some embodiments, the heater 2 has a first channel (not shown) and a second channel (not shown), the first channel is connected to the air outlet 111, the second channel is connected to the heat user 3, and there is circulating water (not shown) in the second channel. The extraction steam in the first channel is heat exchanged with the circulating water in the second channel.

[0049] Specifically, the fifth branch 1182 connects the air outlet 111 and the first channel, so that the extraction steam can flow into the first channel through the fifth branch 1182 and exchange heat with the circulating water in the second channel. After the circulating water is heated, it flows into the heat user 3 to provide heat to the heat user 3.

[0050] In some embodiments, the system for improving the heating capacity of the heating unit also includes a first pipeline 61, a second pipeline 62 and a second pump 67. The first pipeline 61 and the second pipeline 62 connect the heat user 3 and the second channel. The second pump 67 is arranged on the first pipeline 61. The second pump 67 is used to pump the circulating water in the second channel into the heat user 3 to provide heat to the heat user 3. The cooled circulating water then flows back to the second channel through the second pipeline 62.

[0051] Specifically, the second pump 67 is arranged on the first pipeline 61, which can quickly pass the circulating water in the second pipeline into the heat user 3, increase the flow speed of the circulating water between the second channel and the heat user 3, thereby improving the heating effect of the steam turbine generator set 1 to the heat user 3.

[0052] In some embodiments, the economizer 13 has a third channel (not shown) and a fourth channel (not shown). The third channel connects the boiler 12 and the body 11 so that the flue gas exhausted by the boiler 12 can enter the third channel.

[0053] The system for improving the heating capacity of the heating unit also includes a third pipeline 63 and a fourth pipeline 64. The third pipeline 63 connects the first pipeline 61 and the fourth channel, and the fourth pipeline 64 connects the second pipeline 62 and the fourth channel. Part of the circulating water in the second pipeline 62 can enter the fourth channel through the fourth pipeline 64. The extraction steam in the third channel can heat part of the circulating water in the fourth channel, and the heated circulating water flows back to the first pipeline 61 through the third pipeline 63.

[0054] Specifically, one end of the third pipe 63 is located between the second pump 67 and the heat user 3 and communicates with the first pipe 61. The other end of the third pipe 63 communicates with the fourth channel. Some of the circulating water in the second pipe 62 flows through the fourth pipe 64 into the fourth channel for heating. The heated circulating water then flows through the third pipe 63 into the first pipe 61. The second pump 67 then passes the circulating hot water in the first pipe 61 to the heat user 3.

[0055] When the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3 but still cannot meet the needs of the heat user 3, it is necessary to allow part of the circulating water in the second pipeline 62 to enter the fourth channel through the fourth pipeline 64, so that the high-temperature flue gas in the third channel can heat the circulating water in the fourth channel. After the circulating water in the fourth channel is heated, it flows back to the heat user 3 through the third pipeline 63 and the first pipeline 61 to provide heat to the heat user 3, so that the economizer 13, the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3, which not only meets the needs of the heat user 3, but also improves the reliability of the system operation of improving the heating capacity of the heating unit in the embodiment of the present invention.

[0056] In some embodiments, the system for improving the heating capacity of the heating unit further includes a first valve 71 , a second valve 72 , a third valve 73 and a fourth valve 74 .

[0057] The first valve 71 is provided on the first pipeline 61 and is used to control the closing of the first pipeline 61 . The first valve 71 is located between the heat user 3 and the second pump 67 . The connection between the third pipeline 63 and the first pipeline 61 is located between the first valve 71 and the second pump 67 .

[0058] The second valve 72 is provided on the second pipeline 62 , and is used to control the closing of the second pipeline 62 . The connection between the fourth pipeline 64 and the second pipeline 62 is located between the second valve 72 and the heat user 3 .

[0059] Specifically, during conventional heating in winter, the first valve 71 and the second valve 72 are opened so that the extracted steam in the main body 11 can pass into the heater 2 through the air outlet 111 to heat the water in the heater 2, and the water in the heater 2 flows into the heat user 3 to provide heat for the heat user 3.

[0060] The third valve 73 is provided on the third pipeline 63 , and the third valve 73 is used to control the closing of the third pipeline 63 .

[0061] The fourth valve 74 is provided on the fourth pipeline 64 , and the fourth valve 74 is used to control the closing of the fourth pipeline 64 .

[0062] Specifically, when the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3 but still cannot meet the needs of the heat user 3, and the economizer 13 is needed to provide heat to the heat user 3, open the first valve 71, the second valve 72, the third valve 73 and the fourth valve 74 to allow part of the circulating water in the second pipeline 62 to enter the fourth channel through the fourth pipeline 64 for heating, and the heated circulating water then flows back to the heat user 3 through the third pipeline 63 and the first pipeline 61 to provide heat to the heat user 3.

[0063] In some embodiments, the system for improving the heating capacity of the heating unit further includes a fifth pipeline 65 , a fifth valve 75 , a sixth pipeline 66 , a sixth valve 76 and a seventh valve 77 .

[0064] The fifth pipeline 65 communicates with the body 11 and the third channel. The fifth valve 75 is provided on the fifth pipeline 65 . The fifth valve 75 is used to control the closing of the fifth pipeline 65 .

[0065] The sixth pipeline 66 is connected to the third channel and the boiler 12 . The sixth valve 76 is provided on the sixth pipeline 66 . The sixth valve 76 is used to control the closing of the sixth pipeline 66 .

[0066] The seventh valve 77 is provided on the first branch 5 , and is used to control the closing of the first branch 5 .

[0067] Specifically, when heat is supplied to the heat user 3 through the economizer 13, the first valve 71, the second valve 72, the third valve 73, the fourth valve 74 and the seventh valve 77 are opened, and the fifth valve 75 and the sixth valve 76 are closed to short-circuit the economizer 13 through the first branch 5, so that the circulating water inside the main body 11 can flow directly into the boiler 12 through the first branch 5, and the high-temperature flue gas in the economizer 13 heats the circulating water in the fourth channel, so as to improve the heating efficiency of the circulating water in the fourth channel.

[0068] In some embodiments, the heating assembly 4 further includes a high-voltage transformer 46, which connects the body 11 and the heating element 41 to supply power to the heating element 41. Specifically, the high-voltage transformer 46 connects the generator 112 and the heating element 41 to supply power to the heating element 41.

[0069] The method for improving the heating capacity of a heating unit according to an embodiment of the present invention includes:

[0070] When the heat load is low in the winter heating condition, the first valve 71 and the second valve 72 are opened to supply heat to the heat user 3 through the steam turbine generator set 1 .

[0071] During deep peak-shaving heating, the heating component 4 and the steam turbine generator set 1 simultaneously supply heat to the heat user 3.

[0072] When the maximum heating condition is reached, the third valve 73 , the fourth valve 74 and the seventh valve 77 are opened, the fifth valve 75 and the sixth valve 76 are closed, and the economizer 13 , the steam turbine generator set 1 and the heating component 4 supply heat to the heat user 3 at the same time.

[0073] In an embodiment of the present invention, a method for improving the heating capacity of a heating unit is provided. When the heat load of the heating condition is low in winter, the first valve 71 and the second valve 72 are opened so that the main body 11 can pass the internal extraction steam into the heater 2 through the air outlet 111 to heat the water in the heater 2. The water in the heater 2 flows into the heat user 3 to provide heat to the heat user 3.

[0074] During deep peak-shaving heating, the heating element 41 is started to heat the water in the water tank 42 so that the water in the water tank 42 can provide heat to the heat user 3, thereby realizing that the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3, so as to further improve the heating capacity of the system for improving the heating capacity of the heating unit in the embodiment of the present invention.

[0075] When the heating component 4 and the steam turbine generator set 1 jointly provide heat to the heat user 3 but still cannot meet the demand of the heat user 3, open the first valve 71, the second valve 72, the third valve 73, the fourth valve 74 and the seventh valve 77, and close the fifth valve 75 and the sixth valve 76 to short-circuit the economizer 13, so that the economizer 13 can provide heat to the heat user 3, so that the economizer 13, the heating component 4 and the steam turbine generator set 1 can jointly provide heat to the heat user 3. Therefore, not only can the heating capacity of the system for improving the heating capacity of the heating unit in the embodiment of the present invention be improved, but the operation is also simple, which is conducive to further promotion and application.

[0076] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0078] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0079] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0080] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0081] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A system for improving the heating capacity of a heating unit, characterized in that: include: A steam turbine generator set (1), the steam turbine generator set (1) comprising a body (11), a boiler (12) and an economizer (13) connected in sequence, the boiler (12) being used to supply heat to the body (11), the economizer (13) being used to recover waste heat from exhaust gas of the boiler (12), and the body (11) having an air outlet (111); A heater (2) and a heat user (3), wherein water is contained in the heater (2), the heater (2) is in communication with the air outlet (111) and the heat user (3), respectively, the steam turbine generator set (1) passes extraction steam into the heater (2) through the air outlet (111) to heat the water in the heater (2), and the heated water is used to provide heat for the heat user (3); A heating component (4), the heating component (4) comprising a heating element (41) and a water storage tank (42), the heating element (41) being connected to the water storage tank (42) to heat water in the water storage tank (42), the water storage tank (42) being connected to the heat user (3), the heater (2) having a first channel and a second channel, the first channel being connected to the air outlet (111), and the second channel being connected to the heat user (3); a first branch (5), one end of the first branch (5) being connected to the body (11), the other end of the first branch (5) being located between the boiler (12) and the economizer (13), the first branch (5) and the economizer (13) being arranged in parallel, and the economizer (13) being connected to the heat user (3); A first pipeline (61), a second pipeline (62) and a second pump (67), wherein the first pipeline (61) and the second pipeline (62) are both connected to the heat user (3) and the second channel, and the second pump (67) is provided on the first pipeline (61). The second pump (67) is used to pump the circulating water in the second channel into the heat user (3) to provide heat to the heat user (3), and the cooled circulating water then flows back to the second channel through the second pipeline (62); the economizer (13) has a third channel and a fourth channel, wherein the third channel is connected to the boiler (12) and the body (11), so that the flue gas discharged from the boiler (12) enters the third channel; A third pipeline (63) and a fourth pipeline (64), wherein the third pipeline (63) is connected to the first pipeline (61) and the fourth channel, and the fourth pipeline (64) is connected to the second pipeline (62) and the fourth channel. Part of the circulating water in the second pipeline (62) enters the fourth channel through the fourth pipeline (64), and the extraction steam in the third channel heats part of the circulating water in the fourth channel. The heated circulating water flows back to the first pipeline (61) through the third pipeline (63).

2. The system for improving the heating capacity of a heating unit according to claim 1, characterized in that: The water storage tank (42) has a water outlet (421) and a water inlet (422), and both the water outlet (421) and the water inlet (422) are connected to the heat user (3). Hot water in the water storage tank (42) enters the heat user (3) through the water outlet (421) to provide heat for the heat user (3), and the heated water then flows back to the water storage tank (42) through the water inlet (422).

3. The system for improving the heating capacity of a heating unit according to claim 2, characterized in that: The heating component (4) further comprises a second branch (43), a third branch (44) and a first pump (45). The second branch (43) and the third branch (44) are both connected to the water storage tank (42) and the heat user (3). The first pump (45) is arranged on the second branch (43). The first pump (45) is used to pass the water in the water storage tank (42) into the heat user (3) to provide heat to the heat user (3). The cooled water then flows back to the water storage tank (42) through the third branch (44).

4. The system for improving the heating capacity of a heating unit according to claim 1, characterized in that: There is circulating water in the second channel, and the extraction steam in the first channel performs heat exchange with the circulating water in the second channel.

5. The system for improving the heating capacity of a heating unit according to claim 1, characterized in that: Also includes: a first valve (71), the first valve (71) being provided on the first pipeline (61), the first valve (71) being used to control the closing of the first pipeline (61), the first valve (71) being located between the heat user (3) and the second pump (67), and the connection between the third pipeline (63) and the first pipeline (61) being located between the first valve (71) and the second pump (67); a second valve (72), the second valve (72) being provided on the second pipeline (62), the second valve (72) being used to control the closing of the second pipeline (62), and the connection between the fourth pipeline (64) and the second pipeline (62) being located between the second valve (72) and the heat user (3); a third valve (73), the third valve (73) being provided on the third pipeline (63), the third valve (73) being used to control the closing of the third pipeline (63); A fourth valve (74) is provided on the fourth pipeline (64), and the fourth valve (74) is used to control the closing of the fourth pipeline (64).

6. The system for improving the heating capacity of a heating unit according to claim 5, characterized in that: Also includes: a fifth pipeline (65) and a fifth valve (75), wherein the fifth pipeline (65) is connected to the body (11) and the third channel, and the fifth valve (75) is provided on the fifth pipeline (65), and the fifth valve (75) is used to control the closing of the fifth pipeline (65); a sixth pipeline (66) and a sixth valve (76), wherein the sixth pipeline (66) is connected to the third channel and the boiler (12), and the sixth valve (76) is provided on the sixth pipeline (66), and the sixth valve (76) is used to control the closing of the sixth pipeline (66); A seventh valve (77), the seventh valve (77) is provided on the first branch (5), and the seventh valve (77) is used to control the closing of the first branch (5).

7. The system for improving the heating capacity of a heating unit according to claim 1, characterized in that: The heating component (4) further includes a high-voltage transformer (46), and the high-voltage transformer (46) is connected to the body (11) and the heating element (41) to supply power to the heating element (41).

8. The method for improving the heating capacity of a heating unit according to claim 6, characterized in that: When the heat load is low in winter heating operation, the first valve (71) and the second valve (72) are opened to supply heat to the heat user (3) through the steam turbine generator set (1); During deep peak-shaving heating, the heating component (4) and the steam turbine generator set (1) simultaneously supply heat to the heat user (3); When the maximum heating condition is reached, the third valve (73), the fourth valve (74) and the seventh valve (77) are opened, the fifth valve (75) and the sixth valve (76) are closed, and the economizer (13), the steam turbine generator set (1) and the heating component (4) simultaneously supply heat to the heat user (3).

Images