CN217107145U

CN217107145U - Abundant steam utilization system

Info

Publication number: CN217107145U
Application number: CN202220748251.8U
Authority: CN
Inventors: 刘滕; 刘泽; 赵晓明; 张海滨; 李玉典; 郭孟宇
Original assignee: Hengli Petrochemical Dalian Chemical Co Ltd
Current assignee: Hengli Petrochemical Dalian Chemical Co Ltd
Priority date: 2022-04-02
Filing date: 2022-04-02
Publication date: 2022-08-02
Anticipated expiration: 2032-04-02

Abstract

The utility model relates to a rich steam utilizes system, including superhigh pressure steam line, steam turbine, generator and high-pressure steam line, superhigh pressure steam line with steam turbine's steam inlet connects, steam turbine's steam outlet through first pipeline with high-pressure steam line connects, steam turbine pass through the gear box with the generator drive is connected. The surplus steam energy in the ultrahigh pressure steam pipeline drives the steam turbine to drive the generator to generate electricity, and the electricity is converted into electric energy to achieve the purpose that the steam pipeline network is stable, so that the temperature and pressure reduction work is replaced. Better energy utilization, avoidance of useless energy loss and effective alleviation of carbon neutralization.

Description

Abundant steam utilization system

Technical Field

The utility model relates to a chemical industry technical field especially relates to a rich steam utilization system.

Background

The core unit of the chemical device is driven by a steam turbine, whether the unit stably runs is determined by the influence of a steam main pipe network, particularly an ethylene device, the cracking furnace self-produced ultrahigh-pressure steam drives a cracking gas compressor turbine and a cracking gas compressor to extract high-pressure steam to supply to a turbine unit for ethylene and propylene machines under normal conditions, and an ethylene three-machine running mode is formed. During normal production, due to the fluctuation of the load of the device, the ultrahigh-pressure pipe network needs to supplement pressure to the high-pressure pipe network all the time to maintain the balance of the whole steam pipe network system. And the conventional pressure supplementing mode is completed by adopting a temperature and pressure reducing device, so that the problem of serious steam energy loss exists.

SUMMERY OF THE UTILITY MODEL

To solve the problems in the prior art, the present invention provides a rich steam utilization system.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a rich steam utilizes system, includes superhigh pressure steam line, steam turbine, generator and high-pressure steam line, superhigh pressure steam line with steam turbine's steam inlet connects, steam turbine's steam outlet through first pipeline with high-pressure steam line connects, steam turbine pass through the gear box with the generator drive is connected.

Further, the device also comprises an overheating treatment device arranged on the first pipeline.

Furthermore, the system also comprises a desuperheating water pipeline arranged on the first pipeline at the downstream of the overheating treatment device, and a desuperheating water regulating valve is arranged on the desuperheating water pipeline.

Further, the overheating treatment device is an internal coil pipe of the radiation section module of the ethylene cracking furnace.

Further, an outlet check valve is arranged on the first pipeline close to the steam outlet end of the steam turbine.

Further, the system also comprises a grid-connected cut-off valve arranged on the high-pressure steam pipeline.

Further, still including setting up manual trip valve and the electronic trip valve on the superhigh pressure steam line.

Compared with the prior art, the utility model beneficial effect be:

the utility model provides a pair of rich steam utilizes system, including superhigh pressure steam line, steam turbine, generator and high-pressure steam line, superhigh pressure steam line with steam turbine's steam inlet connects, steam turbine's steam outlet through first pipeline with high-pressure steam line connects, steam turbine pass through the gear box with the generator drive is connected. The surplus steam energy in the ultrahigh pressure steam pipeline drives the steam turbine to drive the generator to generate electricity, and the electricity is converted into electric energy to achieve the purpose that the steam pipeline network is stable, so that the temperature and pressure reduction work is replaced. Better energy utilization, avoidance of useless energy loss and effective alleviation of carbon neutralization.

Drawings

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

In the figure: 1. ultrahigh pressure steam pipeline, 2, steam turbine, 3, generator, 4, high pressure steam pipeline, 5, manual trip valve, 6, electronic trip valve, 7, first pipeline, 8, gear box, 9, the trip valve that is incorporated into the power networks, 10, the inside coil pipe of pyrolysis furnace radiation section module, 11, check valve, 12, the temperature reduction water pipeline, 13, the temperature reduction water governing valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Example 1

As shown in FIG. 1, a rich steam utilization system includes an ultra-high pressure steam pipeline 1, a steam turbine 2 (model: HG25/16/8, GmbH), a generator 3 (model: YZKS630-2, GmbH), and a high pressure steam pipeline 4. The ultrahigh pressure steam pipeline 1 is used for being communicated with the self-produced ultrahigh pressure steam of the cracking furnace, and the ultrahigh pressure steam pipeline 1 is connected with a manual cut-off valve 5 and an electric cut-off valve 6. The ultrahigh pressure steam pipeline 1 is connected with a steam inlet of the steam turbine 2, a steam outlet of the steam turbine 2 is connected with the high pressure steam pipeline 4 through a first pipeline 7, and the steam turbine 2 is in driving connection with the generator 3 through a gear box 8 and can drive the generator 3 to generate electricity under the action of steam. The high-pressure steam pipeline 4 is connected with a grid-connected cut-off valve 9.

In this embodiment, an overheating treatment device is connected to the first pipe 7. The superheating device is used for steam reheating of the steam discharged from the steam turbine 2. Preferably, the overheating treatment device is a coil 10 inside the radiation section module of the cracking furnace. A non-return valve 11 is connected to the first line 7, the non-return valve 11 being located close to the steam outlet of the steam turbine 2.

The embodiment further comprises a desuperheating water line 12, the desuperheating water line 12 is arranged on the first pipeline 7 at the downstream of the overheating treatment device, and a desuperheating water regulating valve 13 is arranged on the desuperheating water line 12.

In this example, the cracking furnace is an ethylene cracking furnace.

The working steps of this embodiment are as follows:

the cracking furnace of the ethylene device generates ultrahigh pressure steam in the production process and is merged into a steam pipe network. In the embodiment, the ultrahigh pressure steam pipeline 1 is led out from a steam pipe network, ultrahigh pressure steam firstly enters the manual cut-off valve 5 and enters the steam turbine 2 unit through the electric cut-off valve 6, the impeller rotates to drive the gear box 8 to rotate, and the rotating speed required by the generator 3 is achieved through the gear box 8 for speed change so as to generate electricity.

After the steam turbine 2 unit works, steam is discharged through the low-pressure end of the turbine, and the discharge port is provided with a check valve 11 to prevent gas from flowing backwards. The low-pressure steam enters the coil pipe 10 in the radiation section module of the ethylene cracking furnace through the first pipeline 7 to be superheated, the superheated steam is micro-regulated to the required temperature of a pipe network through the desuperheating water regulating valve 13 on the desuperheating water pipeline 12, and the superheated steam is merged into the high-pressure steam pipeline 4 through the grid-connected cut-off valve 9 to keep the whole pipe network stable.

Note that, in the present embodiment, the ultrahigh-pressure steam: 11.5-12.3MPa, high pressure steam: 3.4-4.1MPa, low pressure steam: 0.45-0.5MPa, reduced water pressure: 16-15 MPa.

Compared with the prior art, the embodiment has the beneficial effects that:

steam turbine 2, generator 3 and steam reheat process are passed through to this embodiment, successfully develop up and replace the surplus steam of former system and carry out pipe network balanced work through the pressure reducer that reduces the temperature, better utilization energy avoids the useless loss of energy, effectively alleviates in the carbon.

In the description of the present invention, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An abundant steam utilization system, characterized in that: including superhigh pressure steam line, steam turbine, generator and high-pressure steam line, superhigh pressure steam line with steam turbine's steam inlet connects, steam turbine's steam outlet through first pipeline with high-pressure steam line connects, steam turbine pass through the gear box with generator drive is connected.

2. The rich steam utilization system of claim 1, wherein: the device also comprises an overheating treatment device arranged on the first pipeline.

3. The rich steam utilization system of claim 2, wherein: the system also comprises a desuperheating water pipeline arranged on a first pipeline at the downstream of the overheating treatment device, and a desuperheating water regulating valve is arranged on the desuperheating water pipeline.

4. A rich steam utilization system as claimed in claim 2 or 3, wherein: the overheating treatment device is a coil pipe in a radiation section module of the ethylene cracking furnace.

5. The rich steam utilization system of claim 1, wherein: an outlet check valve is disposed on the first conduit adjacent the steam outlet end of the steam turbine.

6. The rich steam utilization system of claim 1, wherein: the high-pressure steam pipeline is characterized by further comprising a grid-connected cut-off valve arranged on the high-pressure steam pipeline.

7. The rich steam utilization system of claim 1, wherein: still including setting up manual trip valve and the electronic trip valve on the superhigh pressure steam line.

8. The rich steam utilization system of claim 1, wherein: the ultrahigh pressure steam pipeline is used for being communicated with the self-produced ultrahigh pressure steam of the cracking furnace.