Spraying device in exhaust pipeline of steam turbine

Abstract

The utility model discloses a steam turbine exhaust duct internal spraying device, and belongs to the technical field of steam turbine exhaust, the steam turbine exhaust duct internal spraying device comprises a steam exhaust pipe, one end of the steam exhaust pipe is provided with a mounting mechanism, the bottom of the mounting mechanism is fixedly connected with a flow guide mechanism, and the mounting mechanism is internally provided with a spraying mechanism; a connecting pipe is installed at the end, away from the steam exhaust pipe, of the installation mechanism, a direct air-cooling condenser is installed on the side, away from the installation mechanism, of the connecting pipe, an installation space is provided for the spraying mechanism through the installation mechanism, one path is introduced into a demineralized water pipeline to enter the spraying mechanism, and the other path is introduced into the demineralized water pipeline to enter the direct air-cooling condenser. When the unit generates a large amount of dead steam during high-load work, heat exchange can be carried out through the spraying mechanism and the dead steam of the steam turbine, so that part of the dead steam is condensed into water, the flow of the steam entering the direct air-cooling condenser is reduced, the heat exchange effect of the direct air-cooling condenser is relatively improved, the unit forms higher vacuum, and the service life of the unit is prolonged. And the operation efficiency of the steam turbine is indirectly improved.

Description

Technical Field

[0001] This application relates to the technical field of steam turbine exhaust, and particularly to a spray device inside the steam turbine exhaust pipe. Background Technique

[0002] A steam turbine is a power machine that utilizes high-temperature and high-pressure steam or other working fluids and converts thermal energy into mechanical energy. Steam turbine exhaust refers to the process in which the working fluid (usually steam) is discharged from the steam turbine after the energy conversion is completed inside the steam turbine. Inside the steam turbine, the high-temperature and high-pressure working fluid drives the impeller to rotate through expansion, generating mechanical power, and then the working fluid is released into the atmosphere. This process is the steam turbine exhaust.

[0003] The exhausted steam directly discharged from the steam turbine enters the direct air-cooled condenser through the steam turbine exhaust pipe. When the unit is at high load, the amount of exhausted steam generated is relatively large, and the heat exchange area of the direct air-cooled condenser is relatively small. The direct air-cooled condenser cannot meet the heat exchange requirements of such a large amount of exhausted steam, resulting in a relatively low operating efficiency of the steam turbine. Content of the Utility Model

[0004] The spray device inside the steam turbine exhaust pipe proposed in this application is to solve the problems raised in the above background technique.

[0005] In order to achieve the above object, this application adopts the following technical solutions:

[0006] The spray device inside the steam turbine exhaust pipe includes an exhaust pipe. One end of the exhaust pipe is equipped with an installation mechanism. The bottom of the installation mechanism is fixedly connected with a diversion mechanism. A spray mechanism is installed inside the installation mechanism. One end of the installation mechanism away from the exhaust pipe is equipped with a connecting pipe. On the side of the connecting pipe away from the installation mechanism, there is a direct air-cooled condenser. The output end of the direct air-cooled condenser is equipped with a return pipe.

[0007] As a preferred embodiment, the installation mechanism includes an installation pipe. A spray mechanism is installed inside the installation pipe. Two conical hopper pipes are fixedly connected to both sides of the installation pipe. One end of each of the two conical hopper pipes away from the installation pipe is respectively equipped with an exhaust pipe and a connecting pipe.

[0008] By adopting the above technical solutions, the installation mechanism is responsible for providing a position for the fixed installation of the spray mechanism and the diversion mechanism, maintaining the normal operation of the condensation operation.

[0009] As a preferred embodiment, the spraying mechanism includes an interface which penetrates through the lower end of the wall of the installation pipe and is connected to an outer annular pipe in a through manner. An adapter pipe is installed around the middle of the outer annular pipe and is evenly distributed. The inner side of one side of the adapter pipe away from the outer annular pipe is connected to an inner annular pipe in a through manner. A plurality of nozzles are evenly arranged and installed around the inner annular pipe and the outer annular pipe close to the exhaust pipe. A plurality of connection blocks are fixedly connected to the outer side of the outer annular pipe, and one end of the connection block away from the outer annular pipe is installed on the inner side of the installation pipe.

[0010] By adopting the above technical solution, the spraying mechanism is responsible for cooling and condensing part of the exhausted steam into liquid, so as to ensure the normal operation of the direct air-cooled condenser.

[0011] As a preferred embodiment, a cold water pipe is installed above the interface, and a desalinated water pipe is installed at one end of the cold water pipe away from the interface.

[0012] By adopting the above technical solution, the cold water pipe is responsible for providing sufficient water source for the cold water pipe.

[0013] As a preferred embodiment, the guiding mechanism includes a liquid collecting hopper, the upper side of the side surface of the liquid collecting hopper is fixedly connected to the bottom wall of the installation pipe, and a condensing pipe is fixedly connected to the lower end of the liquid collecting hopper.

[0014] By adopting the above technical solution, the guiding mechanism is responsible for collecting the condensed water to maintain the subsequent condensation effect.

[0015] As a preferred embodiment, one side of the condensing pipe away from the installation pipe is connected to the inside of the return pipe in a through manner, and a one-way valve is installed at the connection point of the condensing pipe and the return pipe.

[0016] By adopting the above technical solution, the condensing pipe is responsible for bringing the condensed water back to the system and participating in the cycle, thus realizing the recovery operation of the condensed water.

[0017] The beneficial effects of this application:

[0018] For the internal spraying device of the steam turbine exhaust pipeline, the installation mechanism provides an installation space for the spraying mechanism, and a path is introduced into the spraying mechanism on the demineralized water pipeline. When the exhausted steam generated during the high-load operation of the unit is relatively large, the spraying mechanism can exchange heat with the exhausted steam of the steam turbine, causing part of the exhausted steam to condense into water, reducing the steam flow entering the direct air-cooled condenser, relatively improving the heat exchange effect of the direct air-cooled condenser, forming a higher vacuum for the unit, and indirectly improving the operation efficiency of the steam turbine. Description of the Drawings

[0019] Figure 1 It is the front view structural schematic diagram of this application;

[0020] Figure 2Schematic structural diagram of the installation mechanism of the present application;

[0021] Figure 3 Longitudinal sectional structural diagram of the installation mechanism of the present application;

[0022] Figure 4 Schematic structural diagram of the spraying mechanism of the present application.

[0023] Reference numerals in the figure: 1, exhaust pipe; 2, installation mechanism; 201, conical hopper pipe; 202, installation pipe; 3, spraying mechanism; 301, interface; 302, outer annular pipe; 303, connecting pipe; 304, inner annular pipe; 305, connecting block; 306, nozzle; 4, connecting pipe; 5, direct air-cooled condenser; 6, return pipe; 7, guiding mechanism; 701, liquid collecting hopper; 702, condensation pipe; 8, cold water pipe; 9, desalinated water pipe. Detailed implementation manners

[0024] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0025] Refer to Figure 1 , the internal spraying device of the steam turbine exhaust pipe, including an exhaust pipe 1, an installation mechanism 2 is installed at one end of the exhaust pipe 1, a guiding mechanism 7 is fixedly connected to the bottom of the installation mechanism 2, a spraying mechanism 3 is installed inside the installation mechanism 2, a connecting pipe 4 is installed at the end of the installation mechanism 2 away from the exhaust pipe 1, a direct air-cooled condenser 5 is installed on the side of the connecting pipe 4 away from the installation mechanism 2, and a return pipe 6 is installed at the output end of the direct air-cooled condenser 5.

[0026] Refer to Figure 2 , the installation mechanism 2 includes an installation pipe 202, a spraying mechanism 3 is installed inside the installation pipe 202, two conical hopper pipes 201 are fixedly connected to both sides of the installation pipe 202, and an exhaust pipe 1 and a connecting pipe 4 are respectively installed at the ends of the two conical hopper pipes 201 away from the installation pipe 202. The exhausted steam enters the installation mechanism 2 from the exhaust pipe 1 and then enters the connecting pipe 4 through the installation mechanism 2. A spraying mechanism 3 is installed inside the installation pipe 202 to cool part of the exhausted steam when necessary to share the working pressure of the direct air-cooled condenser 5.

[0027] Refer to Figure 3, the spraying mechanism 3 includes an interface 301. The interface 301 penetrates through the lower end of the pipe wall of the installation pipe 202 and is connected with an outer annular pipe 302 in a penetrating manner. An adapter pipe 303 is installed around the middle of the outer annular pipe 302 and is evenly distributed. The inner side of the adapter pipe 303 away from the outer annular pipe 302 is connected with an inner annular pipe 304 in a penetrating manner. A plurality of nozzles 306 are evenly arranged and installed around the inner annular pipe 304 and the outer annular pipe 302 close to the exhaust pipe 1. A plurality of connecting blocks 305 are fixedly connected to the outer side of the outer annular pipe 302. One end of the connecting block 305 away from the outer annular pipe 302 is installed on the inner side of the installation pipe 202. Cold water enters from the interface 301, fills the outer annular pipe 302, and enters the inner annular pipe 304 through the adapter pipe 303, and is sprayed out through the nozzles 306 on the front of the inner annular pipe 304 and the outer annular pipe 302, so as to achieve the effect of cooling and condensing the exhaust steam.

[0028] Refer to Figure 1 , a cold water pipe 8 is installed above the interface 301, and a desalinated water pipe 9 is installed at one end of the cold water pipe 8 away from the interface 301. The cold water inside the desalinated water pipe 9 enters the inside of the cold water pipe 8 under the action of water pressure, and enters the inner annular pipe 304 and the outer annular pipe 302 through the interface 301 to achieve the effect of condensing the exhaust steam.

[0029] Refer to Figure 2 , the diversion mechanism 7 includes a liquid collection hopper 701. The upper side of the side of the liquid collection hopper 701 is fixedly connected to the bottom pipe wall of the installation pipe 202, and the lower end of the liquid collection hopper 701 is fixedly connected with a condensate pipe 702. The liquid formed after the exhaust steam is condensed adheres to the inside of the liquid collection hopper 701, the conical hopper pipe 201, and the installation pipe 202, and enters the inside of the liquid collection hopper 701 under the action of gravity, thus realizing the collection of condensate water.

[0030] Refer to Figure 2 , the side of the condensate pipe 702 away from the installation pipe 202 is connected with the inside of the return pipe 6 in a penetrating manner, and a one-way valve is installed at the connection point of the condensate pipe 702 and the return pipe 6. The liquid collected by the liquid collection hopper 701 flows into the inside of the return pipe 6 under the action of gravity. The return pipe 6 is responsible for recovering the condensate water condensed inside the direct air-cooled condenser 5. The condensate water carried by the return pipe 6 returns to the system to participate in the cycle, thus realizing the recovery operation of the condensate water.

[0031] Working principle: The exhaust steam enters the installation mechanism 2 from the exhaust pipe 1, and enters the connecting pipe 4 through the installation mechanism 2. The spraying mechanism 3 installed inside the installation pipe 202 is responsible for cooling part of the exhaust steam when necessary to share the working pressure of the direct air-cooled condenser 5. Cold water enters from the interface 301, fills the outer annular pipe 302, and enters the inner annular pipe 304 through the adapter pipe 303, and is sprayed out through the nozzles 306 on the front of the inner annular pipe 304 and the outer annular pipe 302, so as to achieve the effect of cooling and condensing the exhaust steam;

[0032] The liquid formed after the exhaust steam condenses adheres to the inside of the liquid collecting hopper 701, the conical hopper pipe 201, and the installation pipe 202, and enters the inside of the liquid collecting hopper 701 under the action of gravity, thus realizing the collection of condensed water. The liquid collected by the liquid collecting hopper 701 flows into the return pipe 6 under the action of gravity. The return pipe 6 is responsible for recovering the condensed water condensed inside the direct air-cooled condenser 5. The condensed water carried by the return pipe 6 returns to the system to participate in the cycle, thus realizing the recovery operation of the condensed water.

[0033] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, according to the technical solution and the inventive concept of the present application, makes equivalent substitutions or changes, and should be covered within the protection scope of the present application.

Claims

1. A steam turbine exhaust pipe internal spraying device, comprising an exhaust pipe (1), characterized in that: A mounting mechanism (2) is installed at one end of the exhaust pipe (1), a flow guide mechanism (7) is fixedly connected to the bottom of the mounting mechanism (2), a spray mechanism (3) is installed inside the mounting mechanism (2), a connecting pipe (4) is installed at one end of the mounting mechanism (2) away from the exhaust pipe (1), a direct air-cooled condenser (5) is installed at the side of the connecting pipe (4) away from the mounting mechanism (2), and a return pipe (6) is installed at the output end of the direct air-cooled condenser (5).

2. The internal spraying device of the steam turbine exhaust duct according to claim 1, characterized in that: The mounting mechanism (2) comprises a mounting tube (202), a spray mechanism (3) being mounted inside the mounting tube (202), two conical bucket tubes (201) being fixedly connected to both sides of the mounting tube (202), and an exhaust pipe (1) and a connecting pipe (4) being mounted respectively at one end of the two conical bucket tubes (201) away from the mounting tube (202).

3. The internal spraying device of the steam turbine exhaust duct according to claim 2, characterized in that: The spray mechanism (3) comprises an interface (301), the interface (301) penetrates the lower end of the wall of the installation tube (202) and is connected to and penetrates an outer annular tube (302), a connecting tube (303) is installed around the middle of the outer annular tube (302) and is evenly distributed, an inner annular tube (304) is connected to and penetrates the inside of the connecting tube (303) at a side away from the outer annular tube (302), a plurality of nozzles (306) are evenly arranged and installed around the inner annular tube (304) and the outer annular tube (302) at a side close to the exhaust pipe (1), a plurality of connecting blocks (305) are fixedly connected to the outside of the outer annular tube (302), and the connecting block (305) is installed on the inner side of the installation tube (202) at one end away from the outer annular tube (302).

4. The internal spraying device of the steam turbine exhaust duct according to claim 3, characterized in that: A cold water pipe (8) is installed above the interface (301), and a desalted water pipe (9) is installed at one end of the cold water pipe (8) away from the interface (301).

5. The internal spraying device of the steam turbine exhaust duct according to claim 2, characterized in that: The flow guiding mechanism (7) comprises a liquid collecting hopper (701), the upper end side surface of the liquid collecting hopper (701) being fixedly connected to the bottom tube wall of the mounting tube (202), and the lower end of the liquid collecting hopper (701) being fixedly connected to a condensing tube (702).

6. The internal spraying device of the steam turbine exhaust duct according to claim 5, characterized in that: The side of the condenser pipe (702) away from the installation pipe (202) is connected to the inside of the return pipe (6), and a one-way valve is installed at the connection point between the condenser pipe (702) and the return pipe (6).

Images