CN201297497Y

CN201297497Y - Steam convergence energy-saving device

Info

Publication number: CN201297497Y
Application number: CNU2008201392113U
Authority: CN
Inventors: 卫建
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-10-10
Filing date: 2008-10-10
Publication date: 2009-08-26
Anticipated expiration: 2018-10-10

Abstract

The utility model discloses a steam convergence energy-saving device which is provided with a low pressure steam pipeline, a high pressure steam pipeline and an auxiliary steam main pipe. The low pressure steam pipeline and the high pressure steam pipeline are respectively provided with switch regulation check valve groups A and B, and the high pressure steam pipeline is provided with a branch pipeline; the branch pipeline is provided with a switch regulation check valve group C; the steam convergence energy-saving device is further provided with a steam convergence energy-saving component which is provided with a casing, a main pipe cavity, an influx branch pipe, a circular cavity and a convergence cavity; an influx branch pipe and a semi-circular cavity which is connected with the influx branch pipe are arranged at the middle of the main pipe cavity and the convergence cavity; the outlet of the lower pressure steam pipeline is communicated with the main pipe cavity; the outlet of the branch pipeline on the high pressure steam pipeline is communicated with the influx branch pipe of the steam convergence energy-saving component; the outlets of the convergence cavity of the steam convergence energy-saving component and the high pressure steam main pipeline are communicated with the auxiliary main pipe. The utility model is applicable to the steam supply of the auxiliary steam of an electric power plant, has simple, novel and applicable structure, is controlled flexibly, and can save the energy.

Description

The steam energy saving device that confluxes

Technical field

The utility model belongs to a kind of power station auxiliary steam supplier, is to be used for extracting part high low pressure steam is used for various device as auxiliary steam steam supply device from steam turbine set.

Background technique

At present, generally most of steam all is to be directly used in generating in the generating production process, and the needs in order to produce also will extract part steam from steam turbine and be used for other purposes as auxiliary steam simultaneously.And the steam turbine pressure that draw gas at different levels change with the variation of steam turbine set load, for user that vapour pressure is had certain requirements, in order to guarantee its stable with the pressure of vapour, and the Economy of steam turbine set are increased, and generally all will design two vapour source steam supplies.At first use low pressure vapour source steam supply, when the underpressure of low pressure vapour source, increase the high-pressure steam source steam supply again.Concrete set-up mode is generally all used the form of three-way pipe that low pressure vapour directly is connected with high pressure vapour and is changed.But, cause high pressure steam that low pressure steam is produced the effect of squeezing because the pressure of low pressure steam and the pressure of high pressure steam differ bigger.Both made and dropped into a spot of high pressure steam, low pressure steam is just supplanted, and has replaced the lower low pressure steam supply auxiliary steam of quality thereby formed fully with the higher high pressure steam of quality.Though temperature, the enthalpy of high pressure vapour and low pressure steam are basic identical, but it is bigger that pressure differs, the acting ability has bigger difference, and auxiliary steam only needs the lower heat energy of quality, it is very uneconomic using as auxiliary steam with more high pressure steam, in the energy utilization, cause high-quality low usefulness, unit economy is descended significantly.Therefore, need improve used high low pressure steam collector-shoe gear.

The model utility content

The purpose of this utility model is in order to solve the problems of the technologies described above, and proposes a kind of steam energy saving device that confluxes.Novel simple being suitable for of this apparatus structure can be saved the energy significantly.

The purpose of this utility model is achieved through the following technical solutions: the steam energy saving device that confluxes, be provided with the female pipe of low pressure steam line, high pressure steam main line and auxiliary steam, be respectively equipped with switch on low, the high pressure steam pipeline and regulate reverse stop valve group A, B, it is characterized in that: on the high pressure steam main line, be provided with a high pressure steam bye-pass, also be provided with switch on this bye-pass and regulate reverse stop valve group C; Also be provided with the steam energy-conservation parts that conflux, these parts be provided with shell, main tube cavity, remittance arm, circle around the shape chamber, converge the chamber; Main tube cavity with converge be provided with in the middle of the chamber import arm and with import semicircle that arm is communicated with around the shape chamber; The outlet of described low pressure steam line is communicated with main tube cavity, the conflux remittance arm of energy-conservation parts of the outlet of bye-pass on the high pressure steam main line and vapour is communicated with, and the conflux outlet that converges chamber outlet and high pressure steam main line of energy-conservation parts of steam is managed with described auxiliary steam mother and is communicated with.

Described high pressure steam bye-pass is provided with flow and pressure measuring instruments; Switch in the bye-pass is regulated the reverse stop valve group and is provided with control gear.

High-low pressure combined steam supply energy saving device of the present utility model has the following advantages: 1, can realize the effective steam supply of associating of high pressure steam and low pressure steam, reduce the high pressure steam consumption, effectively energy saving improves unit economy.2, do not have extra resistance during the independent steam supply of low pressure steam, thereby the input point that guarantees high pressure steam does not change, avoids bringing new energy loss because of the use of this device.When 3, uniting steam supply, the pressure of the pressure ratio low pressure steam after confluxing obviously improves, and can regulate pressure as the case may be.4, steam-supplying system pressure can be realized automatic control and adjustment.

Description of drawings

Fig. 1 is an overall structure schematic representation of the present utility model;

Fig. 2 is the conflux structural representation of energy-conservation parts of steam of the present utility model.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described: embodiment: referring to accompanying drawing, the steam energy saving device that confluxes, be provided with the female pipe of low pressure steam line, high pressure steam main line and auxiliary steam, be respectively equipped with switch on low, the high pressure steam pipeline and regulate reverse stop valve group A1, B2, on the high pressure steam main line, be provided with a bye-pass, also be provided with switch on this bye-pass and regulate reverse stop valve group C3; Also be provided with the steam energy-conservation parts 4 that conflux, these parts are provided with shell 4.1, main tube cavity 4.2, import arm 4.3, circle around shape chamber 4.4, converge chamber 4.5; Main tube cavity with converge be provided with in the middle of the chamber import arm and with import semicircle that arm is communicated with around the shape chamber; The outlet of described low pressure steam line is communicated with main tube cavity, the conflux remittance arm of energy-conservation parts of the outlet of bye-pass on the high pressure steam main line and vapour is communicated with, and the conflux outlet that converges chamber outlet and high pressure steam main line of energy-conservation parts of steam is managed with described auxiliary steam mother and is communicated with.

During the utility model work, when the high pressure steam of the bye-pass on the high pressure steam main line is injected the remittance arm, inject semicircle backward in the shape chamber, according to the mechanism of action that is similar to pilot fluid and confluence, high-speed jet and low pressure steam that high pressure steam produces converge, and, in collecting pipe, boost simultaneously to the certain drainage of low pressure steam generation.For checking its performance that flow and pressure measuring instruments can also be set; The control of the motor regulated valve in the bye-pass can also enter the DCS system, thereby realizes control automatically.

Adjusting is a target with the air vent pipework pressure set points, low-pressure pumping steam pressure is as meeting the demands when high load, then fully by the low pressure steam line steam supply, when unit load reduces or the increase of auxiliary steam requirement, when low pressure steam can not satisfy auxiliary steam pressure needs, at first open the high pressure steam bye-pass, realize the associating steam supply of high pressure and low pressure steam by the energy-conservation parts that conflux, when high pressure bye-pass standard-sized sheet still can not satisfy auxiliary steam pressure, open the high pressure steam main line to the female pipe of auxiliary steam by control system again, three tunnel while steam supplies.When unit load increase or the minimizing of auxiliary steam requirement, press the reverse adjusting of said process.

Present embodiment is very good through trial effect, and every index all meets or exceeds related standards, is subjected to user's favorable comment.

Claims

1, a kind of steam energy saving device that confluxes, it is characterized in that: be provided with the female pipe of low pressure steam line, high pressure steam main line and auxiliary steam, be respectively equipped with switch on low, the high pressure steam pipeline and regulate reverse stop valve group A (1), B (2), on the high pressure steam main line, be provided with a bye-pass, also be provided with switch on this bye-pass and regulate reverse stop valve group C (3); Also be provided with the steam energy-conservation parts (4) that conflux, these parts are provided with shell (4.1), main tube cavity (4.2), import arm (4.3), circle around shape chamber (4.4), converge chamber (4.5); Main tube cavity with converge be provided with in the middle of the chamber import arm and with import semicircle that arm is communicated with around the shape chamber; The outlet of described low pressure steam line is communicated with main tube cavity, the conflux remittance arm of energy-conservation parts of the outlet of bye-pass on the high pressure steam main line and vapour is communicated with, and the conflux outlet that converges chamber outlet and high pressure steam main line of energy-conservation parts of steam is managed with described auxiliary steam mother and is communicated with.

2, the steam according to claim 1 energy saving device that confluxes, it is characterized in that: described high pressure steam bye-pass is provided with flow and pressure measuring instruments; Switch in the bye-pass is regulated the reverse stop valve group and is provided with control gear.