CN214577384U

CN214577384U - Boiler energy recovery system

Info

Publication number: CN214577384U
Application number: CN202022647663.6U
Authority: CN
Inventors: 靳普
Original assignee: Individual
Current assignee: Liu Muhua
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-11-02
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a boiler energy recovery system, which comprises at least one boiler, a water turbine and a tail water tank, wherein, a water outlet of the boiler is connected with a water inlet of the water turbine through a pipeline, and a convergent nozzle is arranged at the joint; the tail water tank is arranged below the water turbine. The working principle is as follows: the boiler is heated, the temperature in the boiler rises, the pressure rises along with the temperature, water flow sprayed out from a convergent nozzle at the tail end of the pipeline obtains higher speed, the high-speed water flow pushes the water turbine to rotate, and a rotating shaft of the water turbine is connected with a rotating shaft of the generator, so that power generation of the water turbine can be realized. The utility model discloses the steam that produces gas turbine is used as the heat source for the direct heating boiler, both can guarantee medium pressure in the boiler, can improve energy utilization simultaneously. The utility model discloses a two parallelly connected boilers, when a boiler pressure dropped to the second threshold value, another boiler can continuously promote the hydraulic turbine and do work, guarantees the continuity of hydraulic turbine work, need not the intermittent type, and efficiency further obtains promoting.

Description

Boiler energy recovery system

Technical Field

The utility model relates to a boiler energy recovery system relates to energy recovery technical field.

Background

The Chinese patent application with the publication number of CN111042921A discloses a multi-stage turbine micro gas turbine, which comprises a high-pressure machine and a low-pressure machine, wherein the high-pressure turbine and the low-speed turbine are arranged into multiple stages to form a multi-row turbine stage micro gas turbine, and the multi-stage turbine stage micro gas turbine has the advantages of reasonable structural layout, stable operation and high efficiency. In this device, a plurality of stages of turbines are provided to recover the hot gas generated by the first stage turbine. Waste heat and hot gas generated by the gas turbine can be used for driving a rear-stage turbine to generate electricity, but because the pressure of the sprayed hot gas is uneven everywhere on the same axial section, an unbalanced phenomenon exists when the turbine is blown, so that the phenomenon of shaft collision is generated when the turbine rotates around a shaft, and the heat recovery efficiency is not high.

Disclosure of Invention

To above-mentioned prior art, for the steam that utilizes gas turbine to produce better, the utility model provides a boiler energy recovery system. The utility model uses the hot gas generated by the gas turbine as a heat source to directly heat the boiler or other uses; when the device is used for heating a boiler, the pressure of a medium in the boiler needs to be ensured, and the energy utilization rate is improved as much as possible.

The utility model discloses a realize through following technical scheme:

a boiler energy recovery system comprises at least one boiler, a water turbine and a tail water tank, wherein a water outlet of the boiler is connected with a water inlet of the water turbine through a pipeline, and a convergent nozzle is arranged at the connection position; the tail water tank is arranged below the water turbine and is used for receiving water flowing out of the water turbine.

Further, the boiler has two: the boiler comprises a first boiler and a second boiler, wherein the two boilers are respectively connected with a water turbine through pipelines.

Furthermore, the water outlet of the first boiler is connected with a first pipeline, the water outlet of the second boiler is connected with a second pipeline, the first pipeline and the second pipeline are connected into a whole through a tee joint, the other end of the tee joint is connected with a water outlet main pipe, and the water outlet main pipe is connected with the water inlet of the water turbine through a convergence nozzle arranged at the tail end of the water outlet main pipe.

Furthermore, the tail water tank is connected with a water return port of the boiler through a lifting pipeline.

Furthermore, the return water port of the first boiler is connected with a second lifting pipeline, the return water port of the second boiler is connected with a first lifting pipeline, the first lifting pipeline and the second lifting pipeline are both connected with a lifting main pipe, and the other end of the lifting main pipe is connected with a tail water tank.

Still further, a lift pump is arranged on the lift pipeline or the lift main pipe.

The utility model discloses a boiler energy recovery system, the heating method of boiler are the gas turbine heating, when specifically using, are connected the boiler with gas turbine through heat supply pipeline (by heat supply pipeline for the boiler heat supply), set up the valve on the heat supply pipeline for the switching of the flow of control steam and heat supply pipeline.

The utility model discloses a boiler energy recovery system, the theory of operation is: the boiler is heated by the gas turbine, the temperature in the boiler rises, the pressure rises along with the temperature, so that the water flow sprayed out from the convergent nozzle at the tail end of the pipeline obtains higher speed, and the high-speed water flow pushes the water turbine to rotate, thereby driving the rotating shaft of the water turbine to rotate; if the rotating shaft of the water turbine is connected with the rotating shaft of the generator, the power generation of the water turbine can be realized. And closing the pipeline valve of the boiler when the pressure in the boiler is reduced to a second preset threshold value.

The utility model discloses a boiler energy recovery system has following beneficial effect:

1. the defects of adopting a multi-stage turbine recovery device are overcome; hot gas generated by a gas turbine is used as a heat source for directly heating a boiler; adopt the technical scheme of the utility model, both can guarantee the medium pressure in the boiler, can improve energy utilization simultaneously.

2. The utility model discloses a two parallelly connected boilers, when a boiler pressure dropped to the second threshold value, another boiler can continuously promote the hydraulic turbine and do work, guarantees the continuity of hydraulic turbine work, need not the intermittent type, and efficiency further obtains promoting.

The various terms and phrases used herein have the ordinary meaning as is well known to those skilled in the art. To the extent that the terms and phrases are not inconsistent with a known meaning, the meaning of the present invention is expressed, the specification is set forth.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Wherein, 1-a water turbine, 2-a gas turbine, 31-a first boiler, 32-a second boiler, 4-a tail water tank, 5-a convergent nozzle and 6-a lift pump; l0-a water outlet manifold, L1-a first pipeline, L2-a second pipeline, S0-a lifting manifold, S1-a first lifting pipeline, S2-a second lifting pipeline and an M-heat supply pipeline.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. However, the scope of the present invention is not limited to the following examples. Those skilled in the art will appreciate that various changes and modifications may be made to the invention without departing from the spirit and scope of the invention.

The utility model provides a boiler energy recovery system, includes hydraulic turbine 1, first boiler 31, second boiler 32 and tailwater case 4, as shown in fig. 1, first pipeline L1 is connected to the delivery port of first boiler 31, second pipeline L2 is connected to the delivery port of second boiler 32, first pipeline L1 and second pipeline L2 are as an organic whole through three-way connection, water main L0 is connected to the other end of three-way, water main L0 is connected with the water inlet of hydraulic turbine 1 through the convergent nozzle 5 that sets up at its terminal. The tail water tank 4 is arranged below the water turbine 1 and is used for receiving water flowing out of the water turbine 1. The tail water tank 4 is provided with a lifting header pipe S0, the water inlet end of the lifting header pipe S0 is provided with a lifting pump 6, and the lifting header pipe S0 is divided into a first lifting pipeline S1 and a second lifting pipeline S2 which are respectively connected with the water return ports of the second boiler 32 and the first boiler 31.

When the gas turbine is used specifically, the first boiler 31 and the second boiler 32 are respectively connected with the gas turbine 2 through a heat supply pipeline M, and a valve is arranged on the heat supply pipeline M and used for controlling the flow of hot gas and the opening and closing of the heat supply pipeline M. The rotating shaft of the water turbine 1 is connected with the rotating shaft of the generator.

The working mode is as follows: the first boiler 31 is heated through the gas turbine 2, when the pressure of a medium in the first boiler 31 reaches a first threshold value, a valve on a first pipeline L1 is opened, so that the medium in the first boiler 31 is sprayed out from a convergent nozzle 5, and the water turbine 1 is pushed to do work to generate electricity; simultaneously, a valve on the first lifting pipeline S1 and the lifting pump 6 are opened, the water in the tail water tank 4 is lifted to the second boiler 32, and the second boiler 32 is heated; when the medium pressure in the first boiler 31 reaches a second threshold value, a valve on the first pipeline L1 is closed, and when the medium pressure in the second boiler 32 reaches the first threshold value, a valve on the second pipeline L2 is opened, so that the medium in the second boiler 32 is sprayed out from the convergent nozzle 5, and the hydraulic turbine 1 is pushed to do work to generate electricity; at the same time, the valve on the second lift pipe S2 and the lift pump 6 are opened to lift the water in the tail water tank 4 into the first boiler 31 and heat the first boiler 31. The above processes are repeatedly circulated, so that the medium in the boiler can be decompressed, and the energy in the decompression process can be recovered.

The opening and closing of each valve and the flow regulation can be automatically controlled by adopting an electric valve.

The above examples are provided to those of ordinary skill in the art to fully disclose and describe how to make and use the claimed embodiments, and are not intended to limit the scope of the disclosure herein. Modifications apparent to those skilled in the art are intended to be within the scope of the appended claims.

Claims

1. A boiler energy recovery system characterized by: the system comprises at least one boiler, a water turbine and a tail water tank, wherein a water outlet of the boiler is connected with a water inlet of the water turbine through a pipeline, and a convergent nozzle is arranged at the connection position; the tail water tank is arranged below the water turbine and used for receiving water flowing out of the water turbine.

2. The boiler energy recovery system of claim 1, wherein: the boiler has two: the boiler comprises a first boiler and a second boiler, wherein the two boilers are respectively connected with a water turbine through pipelines.

3. The boiler energy recovery system of claim 2, wherein: the water outlet of the first boiler is connected with a first pipeline, the water outlet of the second boiler is connected with a second pipeline, the first pipeline and the second pipeline are connected into a whole through a tee joint, the other end of the tee joint is connected with a water outlet main pipe, and the water outlet main pipe is connected with the water inlet of the water turbine through a convergent nozzle arranged at the tail end of the water outlet main pipe.

4. The boiler energy recovery system of claim 1, wherein: the tail water tank is connected with a water return port of the boiler through a lifting pipeline.

5. The boiler energy recovery system of claim 2 or 3, wherein: the tail water tank is connected with a water return port of the boiler through a lifting pipeline.

6. The boiler energy recovery system of claim 5, wherein: the second promotes the pipeline is connected to the return water mouth of first boiler, and the first pipeline that promotes is connected to the return water mouth of second boiler, and first promotion pipeline, second promote the pipeline and all be connected with the promotion house steward, and the other end that promotes the house steward is connected with the tailwater tank.

7. The boiler energy recovery system of claim 4, wherein: and a lifting pump is arranged on the lifting pipeline.

8. The boiler energy recovery system of claim 6, wherein: and a lifting pump is arranged on the lifting main pipe.

9. The boiler energy recovery system of claim 1 or 2, wherein: the boiler is connected with the gas turbine through a heat supply pipeline, the gas turbine supplies heat for the boiler through the heat supply pipeline, and a valve is arranged on the heat supply pipeline.

10. The boiler energy recovery system of claim 3, wherein: the first boiler and the second boiler are respectively connected with the gas turbine through heat supply pipelines, the gas turbine supplies heat for the first boiler and the second boiler through the heat supply pipelines, and the heat supply pipelines are provided with valves.