CN114993068A - Hot-blast device of recycling in air cooling island - Google Patents

Abstract

The application discloses device that air cooling island is hot-blast to recycle for improve the utilization ratio of air cooling island steam resource, reduce the waste of steam resource. The device of this application includes: the air cooling island comprises an air cooling island body, air cooling radiating fins, a first fan, an air cooling top cover, a hot air main pipeline and a boiler air smoke system; the air cooling island body is internally connected with a steam exhaust pipeline which is used for exhausting the exhaust steam of the steam turbine; the air cooling radiating fins are arranged in the air cooling island body and fixedly connected with the steam exhaust pipeline, and are used for radiating the exhaust steam in the steam exhaust pipeline; the first fan is arranged in the air cooling island body and is positioned below the air cooling radiating fins, and the first fan is used for blowing cold air to the air cooling radiating fins and the steam exhaust pipeline so as to carry out air cooling heat dissipation on the steam exhaust pipeline and the air cooling radiating fins; an air cooling top cover is fixedly connected above the air cooling island; the air cooling top cover is connected with the boiler air smoke system through a hot air main pipeline and used for conveying hot air generated after air cooling and heat dissipation to the boiler air smoke system through the hot air main pipeline.

Description

A device for reusing hot air in an air-cooled island

technical field

The present application relates to the field of direct air cooling, and in particular, to a device for reusing hot air from an air-cooled island.

Background technique

The direct air cooling equipment such as the air-cooling condenser and the supporting air-cooling fan are installed on the platform at a certain height from the ground. The power plant staff collectively refer to this high-altitude area as the air-cooling island, which usually refers to the air-cooling condenser.

At present, the direct air cooling system used in thermal power plants sends the exhaust steam of the steam turbine to the air-cooled condenser arranged outdoors through the main exhaust steam pipe, and the axial cooling fan makes the air flow over the outer surface of the radiator, and the exhaust steam is discharged. It is cooled into water, and the condensed water is sent back to the regenerative system of the steam turbine through the condensing pump.

However, due to the structure of the air-cooled condenser in the current direct air cooling system, the waste hot air generated after heat exchange by the radiator will be directly discharged into the atmosphere, which is likely to cause waste of hot air resources.

SUMMARY OF THE INVENTION

In order to solve the above problems, the present application provides a device for reusing the hot air of the air-cooled island, which is used to improve the utilization rate of the hot air resources of the air-cooled island and reduce the waste of the hot air resources.

The device for reusing air-cooled island hot air provided by this application includes:

Air-cooled island body, air-cooled heat sink, first fan, air-cooled top cover, hot air main pipe and boiler air and smoke system;

The air-cooling island body is connected with a steam exhaust pipe, and the steam exhaust pipe is used to discharge the exhausted steam of the steam turbine;

The air-cooling fins are installed in the air-cooling island body and are fixedly connected with the exhaust pipe, and the air-cooling fins are used to dissipate the exhausted steam in the exhaust pipe;

The first fan is installed in the air-cooling island body, and is located below the air-cooling fins, and the first fan is used to blow cold air to the air-cooling fins and the exhaust duct, so that the The exhaust duct and the air cooling fins are used for air cooling and heat dissipation;

An air-cooling top cover is fixedly connected above the air-cooling island;

The air-cooled top cover is connected to the boiler air and fume system through the hot air main pipeline, and is used for conveying the hot air generated after air cooling and heat dissipation to the boiler air and fume system through the hot air main pipeline.

Optionally, an air outlet is provided above the air-cooled top cover;

The hot air main duct is arranged above the air-cooled top cover and is fixedly connected with the air outlet of the air-cooled top cover.

Optionally, the boiler fume system includes a boiler;

The boiler is provided with a primary air inlet and a secondary air inlet;

The hot air main pipes are respectively communicated with the primary air inlet and the secondary air inlet, and are used to provide a hot air source for the boiler.

Optionally, the device further includes a second fan;

The second fan is arranged between the main hot air duct and the boiler fume system, and is used to extract the hot air in the main hot air duct and deliver the hot air to the boiler fume system.

Optionally, the boiler includes a primary air heater and a secondary air heater;

The second fan is provided with an air suction port and an air supply port;

The hot air main duct includes a first hot air duct and a second hot air duct;

The air-cooled top cover is connected to the air suction port of the second fan through the first hot air duct;

The air supply port of the second fan is connected to the air suction port of the primary air heater and the air suction port of the secondary air heater through the second hot air duct, and is used for the primary air heater and the secondary air heater. The secondary air heater provides the hot air source.

Optionally, the air-cooling island body is made of metal material, and the air-cooling top cover is made of metal material.

Optionally, the metal material is color steel.

Optionally, the air-cooled island body includes an air-cooled island enclosure;

The air-cooling island enclosure wall and the air-cooling top cover are fixedly connected by welding.

Optionally, the device includes several air cooling fins and several first fans;

The plurality of air-cooling fins are arranged in parallel in the air-cooling island body;

The plurality of first fans are arranged in parallel below the plurality of air-cooling fins and correspond to the air-cooling fins one-to-one.

Optionally, the steam exhaust duct surrounds the outside of the air cooling fins.

As can be seen from the above technical solutions, the present application has the following advantages:

The device of the present application comprises an air-cooling island body, an air-cooling fin, a first fan, an air-cooling top cover, a main hot air pipe, and a boiler air and smoke system; the air-cooling island body is connected with a steam exhaust pipe, and the steam exhaust pipe is used to discharge the exhausted steam of the steam turbine; The air-cooling fins are installed in the air-cooling island body and are fixedly connected to the exhaust pipe. The air-cooling fins are used to dissipate heat from the exhausted steam in the exhaust pipes; the first fan is installed in the air-cooling island body and is located below the air-cooling fins , the first fan is used to blow cold air to the air-cooling fins and the exhaust duct, so that the exhaust duct and the air-cooling fins are air-cooled and dissipated; the air-cooling top cover is fixedly connected to the top of the air-cooling island; the air-cooling top cover is connected to the boiler through the main hot air pipe The air-smoke system connection is used to transport the hot air generated by air-cooling and heat dissipation to the boiler air-smoke system through the hot air main pipe.

An air-cooling top cover is installed above the air-cooling island body to store the hot air after the exhaust steam of the steam turbine is dissipated, and then transported to the boiler air and smoke system through the main hot air pipeline, so as to provide a hot air source for the boiler air and smoke system, thereby improving the boiler air and smoke system. The temperature of the combustion-supporting air can save the energy consumption of the boiler air and smoke system, and at the same time improve the utilization rate of the hot gas resources of the air-cooled island, and reduce the waste of hot gas resources.

Description of drawings

FIG. 1 is a schematic structural diagram of an embodiment of a device for reusing hot air in an air-cooled island provided by the application.

Detailed ways

The present application provides a device for reusing hot air in an air-cooled island, which is used to improve the utilization rate of hot air resources in the air-cooled island and reduce the waste of hot air resources.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", The orientation or positional relationship indicated by "vertical", "horizontal", "horizontal", "longitudinal", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only used to illustrate the relative positional relationship between each component or component , and does not specifically limit the specific installation orientation of each component or component.

In addition, some of the above-mentioned terms may be used to express other meanings besides orientation or positional relationship. For example, the term "on" may also be used to express a certain attachment or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the present application can be understood according to specific situations.

Furthermore, the terms "installed", "arranged", "provided", "connected", "connected" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or a unitary structure; it may be a mechanical connection, or an electrical connection; it may be directly connected, or indirectly connected through an intermediary, or between two devices, elements, or components. internal communication. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In addition, the structures, proportions, sizes, etc. drawn in the drawings in this application are only used to cooperate with the contents disclosed in the description, so as to be understood and read by those skilled in the art, and are not used to limit the implementation of this application. Therefore, it does not have technical substantive significance. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within this within the scope of the technical content disclosed in the application.

Furthermore, the terms "first", "second", "third", etc. (if any) mentioned in this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments described herein can be practiced in sequences other than as illustrated or described herein.

The technical solutions in the present application will be clearly and completely described below with reference to the accompanying drawings in the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Please refer to FIG. 1, the device for reusing the hot air of the air-cooled island provided by this application includes:

The air-cooling island body 1, the air-cooling fins 2, the first fan 3, the air-cooling top cover 4, the hot air main pipe 5 and the boiler air and smoke system 6; the air-cooling island body 1 is connected with a steam exhaust pipe, and the steam exhaust pipe is used to discharge The exhausted steam of the steam turbine; the air-cooled fins 2 are installed in the air-cooled island body 1 and are fixedly connected to the exhaust pipe, and the air-cooled fins 2 are used to dissipate the exhausted steam in the exhaust pipe; the first The fan 3 is installed in the air-cooling island body 1 and is located below the air-cooling fins 2. The first fan 3 is used to blow cold air to the air-cooling fins 2 and the exhaust duct, so that the exhaust duct and the exhaust duct can be blown out. The air-cooled fins 2 are air-cooled and dissipated; the air-cooled top cover 4 is fixedly connected to the top of the air-cooled island; The boiler air and fume system 6 conveys the hot air generated after air cooling and heat dissipation.

In this embodiment, the air-cooling island body 1 is an air cooler that uses air as a cooling medium, and can specifically be used as an air cooling device for a power plant. The air-cooling island body 1 is mainly composed of exhaust pipes, brackets and the like. The exhaust steam pipe is connected with the steam turbine, so that the exhausted steam discharged from the steam turbine circulates in the pipe and reaches the air cooling island for heat dissipation. A first fan 3 is arranged at the inner bottom of the air-cooling island body 1, and above the first fan 3 is an "A"-shaped steam engine room consisting of air-cooling fins 2 and exhaust pipes. Specifically, the air cooling fins 2 are arranged on the surface of the "A"-shaped turbine room. One end of the exhaust pipe is drawn from the main exhaust pipe connected to the steam turbine, and the other end is set at the bottom of the "A" sub-type steam engine room and branches out to the horizontal steam exhaust pipes parallel to the two sides of the "A" type steam engine room. Then, the horizontal steam exhaust pipes on both sides respectively extend several vertical steam exhaust pipes toward the top part of the "A"-shaped steam turbine house, which are used to divert the hot exhaust steam discharged from the steam turbine. The air cooling fins 2 are connected with several vertical steam exhaust pipes, and are used to absorb the heat on the plurality of vertical steam exhaust pipes. For example, the air cooling fins 2 can be arranged to fit with several vertical steam exhaust pipes to increase the contact area between the air cooling fins 2 and the exhaust pipes, thereby improving the heat transfer of the exhaust heat in the exhaust pipes to the air cooling fins 2. efficiency. The steam exhaust pipe can be made of a material with high thermal conductivity, such as copper material, aluminum material, etc., which is not specifically limited here. Then, an air-cooling top cover 4 is fixedly connected above the air-cooling island body 1 ;

In the direct air-cooled heat exchange process, the hot fluid of the exhausted steam discharged from the steam turbine flows through the exhaust pipe, and the heat is conducted to the air-cooled fins 2 . The first fan 3 starts and blows cold air to the upper air cooling fins 2 and the exhaust duct, and the cold air is applied to the air cooling fins and the exhaust duct to condense the hot steam in the exhaust duct. At the same time, the cold air blown by the first fan 3 absorbs heat and becomes hot air, and the hot air circulates upwards and is blocked by the air-cooled top cover 4 to avoid being discharged into the atmosphere, and then the hot air flows through the hot air main pipe 5 to the boiler air and smoke system 6, Hot air resources are provided for the air preheating of the boiler air fume system 6, thereby saving the energy consumption of the boiler air fume system 6, and at the same time improving the utilization rate of the hot air resources of the air cooling island, and reducing the waste of hot air resources.

Optionally, an air outlet is provided above the air-cooled top cover 4 ; the hot air main duct 5 is provided above the air-cooled top cover 4 and is fixedly connected to the air outlet of the air-cooled top cover 4 .

In this embodiment, the air outlet of the air-cooled top cover 4 is arranged in the downstream area, specifically, above the air-cooled top cover 4 . Then, one end of the hot air main duct 5 is connected to the air outlet opened above the air-cooled top cover 4, and the other end is connected to the boiler air and fume system 6, so that the hot air in the air-cooled island can flow upward in the downwind, and from the upper air outlet and the hot air main Pipe 6 flows out to improve the efficiency of hot air outflow.

Optionally, the boiler air fume system 6 includes a boiler; the boiler is provided with a primary air inlet and a secondary air inlet; the hot air main duct 5 is communicated with the primary air inlet and the secondary air inlet, respectively, for providing the boiler. hot air source.

In this embodiment, the boiler fume system 6 includes a boiler, or is called a boiler room. It specifically includes auxiliary equipment such as boilers and pumps, which are generally used for heating and production use. The boiler is provided with a primary air inlet and a secondary air inlet. Generally speaking, the primary air is the fuel air, which is used to transport and dry the pulverized coal into the boiler for combustion, and the secondary air is used to support combustion and provide sufficient oxygen for the combustion of the pulverized coal. In this embodiment, the hot air main pipe 5 is connected with the primary air inlet and the secondary air inlet of the boiler, which can provide the hot air source for the primary air and the secondary air of the boiler, improve the drying effect of the primary air drying pulverized coal, and also can Improve the effect of secondary air combustion.

Optionally, the device also includes a second fan 7; the second fan 7 is arranged between the hot air main duct 5 and the boiler fume system 6, and is used to extract the hot air in the hot air main duct 5 to the boiler. The fume and fume system 6 delivers this hot air.

In this embodiment, a second fan 7 is also provided between the main hot air duct 5 and the boiler, and the hot air source passing through the main hot air duct 5 is pumped by the second fan 7, and the hot air source is pumped to the boiler more quickly, The transportation efficiency of the hot air source is improved, and the residence time of the hot air source in the air cooling top cover 4 and the hot air main duct 5 is reduced.

Optionally, the boiler includes a primary air heater and a secondary air heater; the second fan 7 is provided with an air suction port and an air supply port; the hot air main duct 5 includes a first hot air duct and a second hot air duct; the The air-cooled top cover 4 is connected to the air suction port of the second fan 7 through the first hot air duct; the air supply port of the second fan 7 is connected to the suction port of the primary air heater and the secondary air heater through the second hot air duct The air suction port of the fan is connected to provide a hot air source for the primary air heater and the secondary air heater.

In this embodiment, an air heater is usually provided between the air supply inlet and the air preheater of the boiler. The air heater is a heat exchanger that uses the low-pressure extraction steam of the machine to heat the inlet air of the air preheater. After installing the air heater, the air temperature of the air preheater can be raised by the air heater, so that the heat transfer temperature difference of the air preheater can be reduced, and the low temperature corrosion of the air preheater can be reduced.

In this embodiment, the air-cooled top cover 4 and the suction port of the second fan 7 are connected by a first hot air duct, and the hot air source in the air-cooled island is transported to the suction port of the second fan 7 through the first hot air duct. Then, the air supply port of the second fan 7 is connected to the air suction port of the primary air heater and the air suction port of the secondary air heater through the second hot air duct. Specifically, one end of the second hot air duct can be connected to the air supply port of the second fan 7, and then the other end of the second hot air duct is branched into two branch pipes, which are respectively connected to the air suction port and the two branch pipes of the primary air heater. The suction port of the secondary air heater is connected. A hot air source is provided for the primary air heater and the secondary air heater through the hot air duct and the second fan 7, and the temperature of the air source is increased, thereby increasing the air temperature of the air preheater, which can effectively reduce the power consumption of the heater.

Optionally, the air-cooled island body 1 is made of metal material, and the air-cooled top cover 4 is made of metal material. For example, the metal material is color steel or other alloy steel material.

In this embodiment, the air-cooling island body 1 and the air-cooling top cover 4 can be made of corrosion-resistant and durable metal materials. For example, color steel, reinforced concrete, etc., may also be other metal materials, which are not specifically limited here. In this embodiment, the air-cooled island body 1 and the air-cooled top cover 4 can be made of color steel material, because color steel is a kind of steel plate with organic coating, which not only has good corrosion resistance, wind resistance and durability, etc. At the same time, it is also convenient to process and form, which can reduce the processing cost.

Optionally, the air-cooling island body 1 includes an air-cooling island wall; the air-cooling island wall and the air-cooling top cover 4 are fixedly connected by welding.

In this embodiment, the air-cooling island body 1 includes internal equipment of the air-cooling island and an air-cooling island enclosure. The air-cooling island enclosure wall surrounds the internal equipment of the air-cooling island, and the top is a hollow structure. Therefore, an air-cooling top cover 4 can be installed above the enclosure wall of the air-cooling island to recover the hot air source generated when the air-cooling island is air-cooled for heat dissipation. Specifically, the connection between the air-cooling island enclosure wall and the air-cooling top cover 4 is fixedly connected by welding, so as to improve the stability of the connection.

Optionally, the device includes several air-cooling fins 2 and several first fans 3; the several air-cooling fins 2 are arranged in parallel in the air-cooling island body 1; the several first fans 3 are arranged in parallel in the air-cooling island body 1. Below a plurality of air-cooling fins 2, and corresponding to the air-cooling fins 2 one-to-one.

In this embodiment, several "A"-shaped steam engine rooms composed of air-cooling fins 2 and exhaust pipes, and several first fans 3 can be arranged in the air-cooling island body 1. A first fan 3 is arranged below the type steam engine room, which is used for air-cooling heat dissipation to the air-cooling fins 2 and exhaust pipes above. For example, five rows and six rows of "A"-shaped turbine rooms and the first fan 3 are arranged in the air-cooling island body 1, and each "A"-shaped turbine room and the first fan 3 are arranged in parallel. In this embodiment, the parallel arrangement of the "A"-shaped turbine room and the first fan 3 not only makes the appearance beautiful, but also enables the exhausted steam in the exhaust pipe to be uniformly radiated, thereby improving the radiating effect.

It should be noted that the above description of the disclosed embodiments enables those skilled in the art to realize or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a device for reusing air-cooled island hot air, is characterized in that, described device comprises: Air-cooled island body, air-cooled heat sink, first fan, air-cooled top cover, hot air main pipe and boiler air and smoke system; The air-cooling island body is connected with a steam exhaust pipe, and the steam exhaust pipe is used to discharge the exhausted steam of the steam turbine; The air-cooling fins are installed in the air-cooling island body and are fixedly connected with the exhaust pipe, and the air-cooling fins are used to dissipate the exhausted steam in the exhaust pipe; The first fan is installed in the air-cooling island body, and is located below the air-cooling fins, and the first fan is used to blow cold air to the air-cooling fins and the exhaust duct, so that the The exhaust duct and the air cooling fins are used for air cooling and heat dissipation; An air-cooling top cover is fixedly connected above the air-cooling island; The air-cooled top cover is connected to the boiler air and fume system through the hot air main pipeline, and is used for conveying the hot air generated after air cooling and heat dissipation to the boiler air and fume system through the hot air main pipeline. 2. The device according to claim 1, wherein an air outlet is provided above the air-cooled top cover; The hot air main duct is arranged above the air-cooled top cover and is fixedly connected with the air outlet of the air-cooled top cover. 3. The device according to claim 1, wherein the boiler fume system comprises a boiler; The boiler is provided with a primary air inlet and a secondary air inlet; The hot air main pipes are respectively communicated with the primary air inlet and the secondary air inlet, and are used to provide a hot air source for the boiler. 4. The device according to claim 1, wherein the device further comprises a second fan; The second fan is arranged between the main hot air duct and the boiler fume system, and is used to extract the hot air in the main hot air duct and deliver the hot air to the boiler fume system. 5. The device according to claim 4, wherein the boiler comprises a primary air heater and a secondary air heater; The second fan is provided with an air suction port and an air supply port; The hot air main duct includes a first hot air duct and a second hot air duct; The air-cooled top cover is connected to the air suction port of the second fan through the first hot air duct; The air supply port of the second fan is connected to the air suction port of the primary air heater and the air suction port of the secondary air heater through the second hot air duct, and is used for the primary air heater and the secondary air heater. The secondary air heater provides the hot air source. 6 . The device according to claim 1 , wherein the air-cooling island body is made of a metal material, and the air-cooled top cover is made of a metal material. 7 . 7. The device according to claim 6, wherein the metal material is color steel. 8. The device according to claim 6, wherein the air-cooling island body comprises an air-cooling island enclosure; The air-cooling island enclosure wall and the air-cooling top cover are fixedly connected by welding. 9. The device according to any one of claims 1 to 5, wherein the device comprises several air cooling fins and several first fans; The plurality of air-cooling fins are arranged in parallel in the air-cooling island body; The plurality of first fans are arranged in parallel below the plurality of air-cooling fins and correspond to the air-cooling fins one-to-one. 10. The device according to any one of claims 1 to 5, wherein the exhaust duct is fitted outside the air cooling fins.

Images