CN215907931U

CN215907931U - Turbo generator heating system

Info

Publication number: CN215907931U
Application number: CN202121682457.7U
Authority: CN
Inventors: 陈超
Original assignee: Hangzhou Lancheng Environmental Protection Energy Co ltd
Current assignee: Hangzhou Lancheng Environmental Protection Energy Co ltd
Priority date: 2021-07-22
Filing date: 2021-07-22
Publication date: 2022-02-25
Anticipated expiration: 2031-07-22

Abstract

The utility model relates to a heat supply system of a turbonator, which provides heat energy for a boiler and comprises a steam turbine, a heat supply and steam collection box, a main steam double-reduction heat supply pipeline and a plant area heat supply main pipe, wherein a steam turbine high-pressure steam extraction pipe is arranged between the steam turbine and the heat supply and steam collection box, a first valve is arranged on the steam turbine high-pressure steam extraction pipe, a second valve is arranged on the main steam double-reduction heat supply pipeline, the steam turbine high-pressure steam extraction pipe and the main steam double-reduction heat supply pipeline are combined to the heat supply and steam collection box, and the main steam double-reduction heat supply pipeline is set as a standby pipeline. The utility model designs a steam turbine heating system capable of meeting steam demand. It does not only affect the throughput of sludge in the pass, but also serves to meet the steam demand of the adjacent plants.

Description

Turbo generator heating system

Technical Field

The utility model relates to the technical field of turbonators, in particular to a steam turbine heating system.

Background

The heat supply turbine drives the generator to generate electricity and supplies heat to the outside, so the heat supply turbine is called a heat supply turbine and is also called a cogeneration turbine. It has the outstanding advantages of energy saving, environmental protection and the like, is an energy-saving new product which is mainly supported and popularized by the nation, occupies an important position in national economy, and is widely used in the industries of petroleum, chemical industry, printing and dyeing, textile, cement, papermaking, sugar manufacturing and the like and urban central heating engineering.

When the steam turbine generator unit is applied to a sludge project, the following problems exist: at present, the steam amount of a steam turbine generator unit tends to be saturated through boiler treatment, sometimes, the load of a boiler is even reduced, the load of the boiler is limited by the power generation amount of a steam turbine, and the economic consumption is large.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the utility model relates to a steam turbine heating system, and the steam turbine heating system meeting the steam demand is designed according to the problems. It does not only affect the throughput of sludge in the pass, but also serves to meet the steam demand of the adjacent plants.

The utility model relates to a steam turbine heating system which provides heat energy for a boiler and comprises a steam turbine, a heat supply and steam collection box, a main steam double-reduction heat supply pipeline and a plant area heat supply main pipe, wherein a steam turbine high-pressure steam extraction pipe is arranged between the steam turbine and the heat supply and steam collection box, a first valve is arranged on the steam turbine high-pressure steam extraction pipe, a second valve is arranged on the main steam double-reduction heat supply pipeline, the steam turbine high-pressure steam extraction pipe and the main steam double-reduction heat supply pipeline are combined to the heat supply and steam collection box, and the main steam double-reduction heat supply pipeline is set as a standby pipeline.

By adopting the scheme, the axial displacement, the thrust bearing temperature, the vibration of each bearing and the pressure of each supervision point of the steam turbine are all within a normal range. Under the rated steam supply flow (50t/h), the load of the unit can be normally brought to 15MW for long-term operation, and the load basically has no influence.

Furthermore, the high-pressure steam extraction pipe of the steam turbine is connected with a unit steam extraction opening of the steam turbine, and a section of the connection part of the high-pressure steam extraction pipe of the steam turbine and the unit steam extraction opening is U-shaped.

By adopting the scheme, after the U-shaped bend absorbs partial thermal stress, the steam extraction port of the steam turbine meets the stress requirement.

Furthermore, a temperature and pressure reducing device is arranged on the steam turbine room platform where the steam turbine is located.

By adopting the scheme, the temperature and pressure reduction effect is good.

Furthermore, the steam turbine room platform and the steam turbine are provided with temperature sensors.

By adopting the scheme, the temperature detection is real-time and accurate.

Further, the temperature sensor is connected with a temperature early warning device.

By adopting the scheme, the temperature monitoring is convenient.

Further, the temperature early warning device comprises a controller, an alarm lamp and a buzzer, wherein the alarm lamp, the buzzer and the controller are electrically connected.

Through adopting above-mentioned scheme, can remind the staff when the temperature is too high, in time cool down and handle.

Furthermore, the plant area heat supply main pipe is provided with a rotary compensator.

By adopting the scheme, the thermal strain is compensated.

Further, the first valve is a steam extraction safety valve.

By adopting the scheme, the steam extraction safety is ensured.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

Fig. 1 is a schematic view of a connection structure of a heating system according to an embodiment of the present invention.

FIG. 2 is a schematic view of a temperature and pressure device module according to an embodiment of the present invention.

Reference numeral, 1, a steam turbine; 11. a steam extraction pipe is arranged at the top of the steam turbine; 12. a first valve; 13. A second valve; 14. a steam extraction port of the unit; 2. a heat supply and steam collection box; 3. a main steam double-reduction heat supply pipeline; 4. a plant area heat supply main pipe; 41. a rotation compensator; 5. a temperature sensor; 6. a temperature early warning device; 61. a controller; 62. an alarm light; 63. a buzzer.

Detailed Description

While the embodiments of the present invention will be described and illustrated in detail with reference to the accompanying drawings, it is to be understood that the utility model is not limited to the specific embodiments disclosed, but is intended to cover various modifications, equivalents, and alternatives falling within the scope of the utility model as defined by the appended claims.

For the convenience of understanding the embodiments of the present invention, the following description will be further explained by taking specific embodiments as examples with reference to the drawings, and the embodiments are not to be construed as limiting the embodiments of the present invention.

Embodiment 1 of the present invention is shown in fig. 1 and fig. 2, which is equivalent to adding a new pipeline led out from a unit steam extraction port 14 of a steam turbine 1 in the existing system: the steam turbine high pressure steam extraction pipe 11, the steam turbine high pressure steam extraction pipe 11 merges with the two heat supply pipelines 3 that subtract of main vapour in the heat supply and converge vapour collection case 2 after, and unified is sent to the factory through the main pipe 4 of factory's heat supply and is realized supplying vapour externally.

The steam turbine high-pressure steam extraction pipe 11 absorbs partial thermal stress from the U-shaped bend after coming out of the steam extraction port 14 of the turbine unit, so that the steam extraction port 14 of the turbine 1 meets the stress requirement, wherein the temperature and pressure reducing device is arranged on an east platform of 4.5 meters in the turbine room. The desuperheating water is led out from a plant area heat supply main pipe at the outlet of a 0 m-layer water supply pump, and the heat supply pipeline is converged on a 4.5 m platform, so that the stress requirement is met after measurement and reinforcement by a design institute. The pipeline of the plant heat supply main pipe 4 is provided with a rotary compensator 41 for compensating thermal strain and meeting the stress requirement.

Steam turbine room platform and steam turbine 1 are provided with temperature sensor 5, temperature sensor 5 is connected to temperature early warning device 6, temperature early warning device 6 includes temperature early warning device 61, warning light 62, bee calling organ 63 and controller 61 electric connection.

The main operating condition of the utility model is tested, and the parameters of each working condition are basically consistent with the parameters provided by the thermal equilibrium diagram. The axial displacement, the thrust bush temperature, the vibration of each bearing and the pressure of each prison point of the steam turbine are all within normal ranges. Under the rated steam supply flow (50t/h), the load of the unit can be normally brought to 15MW for long-term operation, and the load basically has no influence.

The economic analysis shows that the unit is trial-run with 15MW electric load, and the steam inlet flow of the unit of the steam turbine 1 is about 100t/h under the working condition of 50t/h of externally supplied steam. And the steam consumption rate of the unit under the pure condensation working condition is 4.2t/MW, the heat supply market price is 160 yuan/t, the net surfing electricity price after subsidy is 0.65 yuan/(KW.h), and the desalted water production cost is 10 yuan/t.

Yield of less power supply: 0.65 × (100 ÷ 4.2-15) × 1000 ═ 5726.2 yuan/h

The income of supplying steam is more: (160-10). times.50 7500 yuan/h

In addition, mechanical ventilation cooling is adopted for circulating water of the condenser of the steam turbine 1, and compared with a pure condensing mode and a heat supply working condition, the steam discharge amount of the condenser is reduced to 30t/h from 54t/h, and is only 55.6% of the original steam discharge amount, so that the circulating water amount can be correspondingly reduced.

The income of the auxiliary power saving: 0.65X (250X 80% +110) ═ 201.5 yuan/h

When the heat supply amount reaches 50t/h, the total income is about more than that of the prior pure condensation working condition: 1975.3 yuan/h. In combination: 1. the load of the boiler is not limited by the generating capacity of the steam turbine any more; 2. the running stability of the unit after heat supply modification is basically the same as that before technical modification; 3. the economy is improved more; 4. due to the reduction of the cooling water amount of the unit, the heat emission amount of the unit to the environment is correspondingly reduced, and the energy-saving and emission-reducing effects are achieved.

In the description of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a turbo generator heating system, provides heat energy for the boiler, and the system includes that steam turbine, heat supply converge vapour collection box, the double heat supply pipeline of main vapour, the main pipe of factory's heat supply, its characterized in that: the steam turbine and the heat supply are converged and are provided with the high steam extraction pipe that adds of steam turbine between the vapour collection case, be provided with first valve on the high steam extraction pipe that adds of steam turbine, be provided with the second valve on the two heat supply pipelines that subtract of main steam, the high steam extraction pipe that adds of steam turbine and the two heat supply pipelines that subtract of main steam merge to heat supply and converge vapour collection case, the two heat supply pipelines that subtract of main steam set up to reserve pipeline.

2. A steam turbine generator heating system according to claim 1, wherein: the high-pressure steam extraction pipe of the steam turbine is connected with a unit steam extraction opening of the steam turbine, and one section of the joint of the high-pressure steam extraction pipe of the steam turbine and the unit steam extraction opening is U-shaped.

3. A steam turbine generator heating system according to claim 2, wherein: and a temperature and pressure reducing device is arranged on the steam turbine room platform where the steam turbine is located.

4. A steam turbine generator heating system according to claim 3, wherein: and the steam turbine room platform and the steam turbine are provided with temperature sensors.

5. The heating system of the steam turbine generator as claimed in claim 4, wherein: the temperature sensor is connected with a temperature early warning device.

6. The heating system of the steam turbine generator as claimed in claim 5, wherein: the temperature early warning device comprises a controller, an alarm lamp and a buzzer, wherein the alarm lamp, the buzzer and the controller are electrically connected.

7. The heating system of the steam turbine generator as claimed in claim 6, wherein: and the plant area heat supply main pipe is provided with a rotary compensator.

8. The heating system of a steam turbine generator according to claim 7, wherein: the first valve is an extraction safety valve.