CN201568087U - Power generating equipment with low-pressure saturated steam - Google Patents
Power generating equipment with low-pressure saturated steam Download PDFInfo
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- CN201568087U CN201568087U CN200920299570XU CN200920299570U CN201568087U CN 201568087 U CN201568087 U CN 201568087U CN 200920299570X U CN200920299570X U CN 200920299570XU CN 200920299570 U CN200920299570 U CN 200920299570U CN 201568087 U CN201568087 U CN 201568087U
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Abstract
The utility model provides power generating equipment with low-pressure saturated steam, which is started by two stages of pressure steams of main steam and supplementary steam. The main steam is inputted to a high-pressure segment 6 and a low-pressure segment 8 of a steam supplement and condensation steam turbine 18 after pressure stabilization by a self-operated regulating valve. The supplementary steam and the main steam push the steam supplement and condensation steam turbine 18 to rotate. The steam supplement and condensation steam turbine 18 drives a power generator 9 to generate power. The utility model uses the converter evaporation saturated steam with higher pressure as the main steam source. Furthermore a certain flow of heating furnace evaporation saturated steam with lower pressure grade is added. The steam supplement and condensation steam turbine is used for generating power. The saturated steam resource of the enterprise is fully used. The stage utilization factor of resource is higher. At a state that the main steam source is intermitted, the supplementary steam can sustain the operation of the unit for ensuring that the power generation unit does not frequently step out because of the production intermittence of the converter system.
Description
Technical field
The utility model relates to the low-pressure saturated steam technical field of power generation, is applicable to that device, particularly smelter that enterprise such as metallurgy utilizes low-pressure saturated steam to generate electricity utilize the device of converter and the generating of oven vaporization recovered steam.
Background technique
Smelter is in consumes energy, can produce secondary energy such as converter vaporization recovered steam, oven vaporization recovered steam again, the energy that they carry belongs to low temperature exhaust heat, is a kind of low-grade saturated vapour resource, is characterized in that pressure is low, water content is big.If insufficient being used, then a large amount of residual heat resources will slattern in vain.
At present, the utilization for above-mentioned steam resource roughly has dual mode: a kind of is heat utilization, directly utilizes its heat energy for producing or living needs, and its utilization ratio is very low; Another kind is to convert thereof into conveying easy to use electric energy flexibly, mainly contains following several mode:
1) adopts the Steam Power Circulation cogeneration technology of being with additional combustion boiler, as using overhead steam boiler.Be characterized in saturated vapour being heated in overhead steam boiler than higher parameter, make it become high-grade superheated vapor, generate electricity by the Turbo-generator Set of routine again with fuel.The shortcoming of this technology is: (1) owing to used overhead steam boiler, the whole system more complicated, and operation maintenance is cumbersome; (2) pollute greatly additive decrementation fuel, waste resource.Just to utilizing low-grade saturated vapour resource to have to add a cover additional combustion boiler, be uneconomic.
2) directly utilize converter vaporization recovered steam, adopt the exhaust heat recovery power generation of the hot merit energy that dehumidifies again in the band machine to generate electricity with condensing turbine.This technology is just utilized the generating of converter vaporization recovered steam merely, and is not used for pressure oven vaporization recovered steam resource on the low side, and the cascade utilization rate of the energy is on the low side.
The model utility content
The technical problems to be solved in the utility model provides a kind of power generating equipment of utilizing low-pressure saturated steam, the low-pressure saturated steam of the different pressures grade that industrial production field such as metallurgy produces all is fully utilized, has that investment is little, operating cost is low, the daily management characteristic of simple.
For solving the problems of the technologies described above, the power generating equipment of utilizing low-pressure saturated steam that the utility model provides is: the high pressure section of main vapour generating means, self-contained pressure regulator, main vapour quick-closing valve, filling condensing steam turbine is linked in sequence by steam conveying pipe; The low pressure stage that steam control valve, filling condensing steam turbine are joined in filling generating means, filling quick-closing valve, filling is linked in sequence by steam conveying pipe; The filling condensing steam turbine drives generator for electricity generation.
Further improvement of the utility model is before described self-contained pressure regulator and main vapour quick-closing valve steam-water separator to be set; Between described filling generating means and the filling quick-closing valve steam-water separator is set.
Further improvement of the utility model is, at each pressure level of flow passage component of described filling condensing steam turbine 18 the water delivery groove is set, and last I and II blade vapour limit is carried out laser hardening and handled, and the three grades of isolating plates in end are provided with the hydrophobic circular groove of dehumidifying.
Further improvement of the utility model is, the vapour condenser that is linked in sequence behind the described filling condensing steam turbine, frequency conversion condensate pump, concentrates the soft water station, and the exhaust steam after the acting enters vapour condenser, and water of condensation is sent into by the frequency conversion condensate pump and concentrated the soft water station.
Relative to existing technologies, the utlity model has following characteristics:
1) directly utilizes saturated vapour generating, do not adopt additional combustion boiler such as overhead steam boiler to carry out the Overheating Treatment of steam, avoided environmental pollution and extra fuel consumption, and system complexity is low, the production easy maintenance.
2) utilize the higher converter vaporization saturated vapour of pressure rating to be main vapour source, the pressure rating oven vaporization saturated vapour on the low side of also behind the unit governing stage, incorporating certain flow into, utilize the generating of filling condensing steam turbine generator group, thereby made full use of the saturated vapour resource of enterprise, the cascade utilization rate of resource is higher; Under the situation of main vapour source interruption, filling can be kept unit operation, guarantees that generator set is not interrupted frequent off-the-line because of converter system production.
3) the pressure controlled combination regulation mode of pressure+self-powering type before main steam adopts.Normal generator set adopts permanent power adjustments, promptly closes the minor adjustment porthole when pressure is high before the machine, opens big adjusting porthole when pressure before the machine is low, and it is constant to keep the unit generation amount.This unit is in order to make full use of afterheat steam, to have adopted the pressure regulative mode of preceding pressure adjusting, promptly open big adjusting porthole when pressure is high before the machine, allow more recovered steam enter steam turbine and generate electricity, increase generated energy as far as possible; Close the minor adjustment porthole when pressure before the machine is low, keeps the unit initial steam pressure, the generated energy of unit reduces.Simultaneously, in order to solve the oxygen blast simultaneously of three block converters, evaporation generating capacity too high problem of moment, on live steam piping, set up the self-erecting type pressure regulator valve, when moment, main vapour pressure surpassed the unit initial steam pressure, the self-erecting type modulating valve is opened automatically, and the steam of pressure peak is leaked into the bigger low pressure steam pipe network of capacity, guarantees that steam does not diffuse.The pressure controlled mode of pressure+self-powering type before this is fully used steam.
4) set up steam-water separator before main vapour, the filling mouth, guarantee out mass dryness fraction 〉=99.5% of vapour; Before each pressure level of the through-flow part of steam turbine hydrophobic groove is set, the laser hardening processing is carried out on last I and II blade vapour limit, and the three grades of dividing plates in end are provided with the hydrophobic circular groove of dehumidifying.
5) utilize condensate pump to reclaim water of condensation and utilization again, pump motor adopts converter technique, has adapted to unit load variation characteristics greatly.
Description of drawings
Below in conjunction with accompanying drawing the utility model is elaborated
Fig. 1 utilizes the electricity-generating method technological process of low-pressure saturated steam
Embodiment
Design philosophy of the present utility model is:
1 thermodynamic system
Main vapour and filling enter steam turbine work done generating, and exhaust steam enters vapour condenser and condenses, and are pooled in the hot well, and water of condensation is through condensate pump, and it is recycling to deliver to plant area soft water station by the pipeline that newly lays.Main vapour is established pipeline and is inserted the power station from the saturated vapour that converter vaporization cooling produces, and simultaneously one group of self-powering type vapor pressure modulating valve has been installed on this pipeline, has improved and stablized the main initial steam pressure of unit.Filling is established pipeline and is inserted the power station from the oven boil-off.At the moisture big shortcoming of saturated vapour, also set up water separator at the unit steam admission side, to guarantee unit admission mass dryness fraction, guarantee safe operation.Required moisturizing when turbine condenser starts connects the soft water pipe network from plant area, and establishes pipeline and insert the power station.
2 clean circulations
System adopts industrial water purification open-circuit system, is that Turbo-generator Set vapour condenser, oil cooler and air cooling device supply water, and supplies water and adopts the pressurization of pump group to supply water, and the recycling water utilization overbottom pressure directly goes up and arrives cooling tower, is back to absorbing well, absorption well after cooling and recycles.Be provided with valveless filter, piping filter and medicine system in the system, to guarantee quality of water supply.
3 electrical design
1) high-pressure system
Generator outlet is established the 10KV voltage bus, and system is the single bus scheme mode, establishes the generator outlet circuit breaker respectively and the network interconnecting circuit that is incorporated into the power networks, and generator synchronous point is located on the generator outlet circuit breaker.
2) low service system
The low-voltage-powered two-way power supply power supply of generator 380V, the one tunnel connects the low pressure station service transformer of spontaneous motor 10KV system busbar, and one the tunnel connects from pumping station.
4, control system
1) regulating system of steam turbine set has adopted the hydraulic executing system that 505 digital electric-hydraulics speed regulator+Siemens of U.S. WOODWARD company production makes, and can realize pressing adjusting before the vapor pressure.The filling system adopts steam turbine to carry the low steam control valve that is press-fitted, by Siemens S-300 control system system control filling pressure and flow.
2) dispose Bentley 3500 detection systems, can detect each vibration of unit, displacement and the difference situation that expands.
3) adopted Siemens S-300 control system, can show relevant operation information, be convenient to the operations staff and the runnability of generator set is monitored and control.
4) simultaneously pumping plant instrument control system is upgraded, adopted the DCS control system, to guarantee the stable of water system.
The example that is utilized as of the steam that produces of saturated vapour that produces with the converter cooling system of iron and steel enterprise and oven evaporated cooling system illustrates the utility model below.
As shown in Figure 1, low-pressure saturated steam electrification technique as well as flow process is as follows: the saturated vapour that main vapour produces from converter vapourization cooling system 1, on the steam line of its conveying, be provided with self-powering type pressure regulator 3, when main vapour pressure is too high, with the part steam diversion to plant area's steam pipe system 2, to reduce the fluctuation of converter vaporization saturated vapour.Saturated vapour after voltage stabilizing is sent into main vapour steam-water separator 4 again, enters turbine high-pressure section 6 through main vapour quick-closing valve 5 again; Filling is from oven evaporated cooling system 11, it sends into filling steam-water separator 12 through pipe special, again through filling quick-closing valve 13 and the low steam control valve 7 that is press-fitted, send into steam turbine low-pressure section 8 by the filling mouth of steam turbine, steam carries out transformation of energy in steam turbine, steam turbine drawing generator 9 generates electricity; Exhaust steam after the acting enters vapour condenser 17, and water of condensation is then sent into by frequency conversion condensate pump 16 and concentrated soft water station 15, again after sending into plant area's soft water pipe network 10 after the water pump pressurization, for converter vapourization cooling system) and oven evaporated cooling system 11 recycling.The saturated main steam that produces from converter vapourization cooling system 1 enters steam turbine from different positions respectively with the filling from oven evaporated cooling system 11.In order to make full use of afterheat steam, the pressure regulative mode that the utility model has adopted preceding pressure to regulate is promptly opened big adjusting porthole when pressure is high before the machine, allow more recovered steam enter steam turbine as far as possible and generate electricity, and increases generated energy; Close the minor adjustment porthole when pressure before the machine is low, keeps the unit initial steam pressure, the generated energy of unit reduces.
System adopts industrial water purification closed circuit circulatory system, for Turbo-generator Set vapour condenser, oil cooler and air cooling device supply water.Supply water to adopt the pressurization of pump group to supply water, the recycling water utilization overbottom pressure directly goes up and arrives cooling tower 14, is back to absorbing well, absorption well after cooling and recycles.Be provided with valveless filter, piping filter and medicine system in the system, to guarantee quality of water supply.
Generator outlet is established the 10KV voltage bus, and system is the single bus scheme mode, establishes the generator outlet circuit breaker respectively and the network interconnecting circuit that is incorporated into the power networks, and generator synchronous point is located on the generator outlet circuit breaker.Generator set and site are located at electric substation, adopt cable run.The power supply of the low-voltage-powered employing two-way of generator 380V power supply.
The hydraulic executing system that 505 digital electric-hydraulics speed regulator+Siemens that the regulating system of steam turbine set has adopted U.S. WOODWARD company to produce makes, the filling system adopts steam turbine to carry the low steam control valve that is press-fitted, by Siemens S-300 control system system control filling pressure and flow.Adopt Bentley 3500 detection systems.
Main power generating equipment of the present utility model is as follows:
1) thermodynamic system equipment mainly comprises filling condensing steam turbine generator, condenser, concentrates oily station, condensate pump, water-jet pump, water separator, self-powering type vapor pressure controlling device and valve etc.;
2) clean circulation equipment mainly comprises cooling tower, pond, raw water service pump group, valveless filter, piping filter, medicine machine and valve etc.;
3) high low pressure electrical system equipment mainly comprises high-low voltage electric power distribution cabinet, excitation device, protection equipment for generator etc.;
4) control system equipment mainly comprises System for Steam Turbine device, unit vibration detection device, PLC control system and one-shot measurement device.
Filling condensing steam turbine group is produced by Hangzhou Zhongneng Steam Turbine Co., Ltd., rated power 9000kw/h.The steam that this steam turbine set is rolled about 45～55t/h, pressure 2.0Mpa that three block converter evaporated cooling systems produce with a steel is incorporated the oven boil-off of 10t/h, pressure 0.8Mpa into as filling simultaneously as main vapour source behind the unit governing stage.
Filling condensing steam turbine group has A, B, three point of admissions of C, and its major parameter is:
The A point. normal point
Initial steam pressure: 2.0 (scope 1.9～2.2) Mpa (A) throttle (steam) temperatures: saturation temperature
Exhaust steam pressure: 0.007Mpa (A) admission flow: 45t/h
Filling pressure: 0.65 (scope 0.6～0.8) Mpa (A) filling temperature: saturation temperature
Filling flow: 10t/h circulating water temperature: 25 ℃ (maximum 34 ℃)
Quantity of circulating water: 4000t/h
Generated output: 9015kw
The B point. maximum point
Initial steam pressure: 2.0 (scope 1.9～2.2) Mpa (A) throttle (steam) temperatures: saturation temperature
The maximum admission flow of exhaust steam pressure: 0.007Mpa (A): 55t/h
Filling pressure: 0.65 (scope 0.6～0.8) Mpa (A) filling temperature: saturation temperature
Maximum filling flow: 15t/h circulating water temperature: 25 ℃ (maximum 34 ℃)
Quantity of circulating water: 4900t/h
Generated output: 11550kw
The C point. smallest point
Initial steam pressure: 2.0 (scope 1.9～2.2) Mpa (A) throttle (steam) temperatures: saturation temperature
Exhaust steam pressure: 0.007Mpa (A) admission flow: 0t/h
Filling pressure: 0.65 (scope 0.6～0.8) Mpa (A) filling temperature: saturation temperature
Filling flow: 10t/h circulating water temperature: 25 ℃ (maximum 34 ℃)
Quantity of circulating water: 750t/h
Generated output :～200kw
The generator set major parameter
Rated power: 12MW
Voltage rating: 10.5KV
Rated speed: 3000r/min
Frequency: 50Hz
Claims (6)
1. power generating equipment of utilizing low-pressure saturated steam, comprise steam raising plant, steam turbine, generator, steam conveying pipe, it is characterized in that the high pressure section (6) of main vapour generating means (1), self-contained pressure regulator (3), main vapour quick-closing valve (5), filling condensing steam turbine (18) is linked in sequence by steam conveying pipe; The low pressure stage (8) that steam control valve (7), filling condensing steam turbine (18) are joined in filling generating means (11), filling quick-closing valve (13), filling is linked in sequence by steam conveying pipe; Filling condensing steam turbine (18) drives generator (9) generating.
2. the power generating equipment of utilizing low-pressure saturated steam as claimed in claim 1 is characterized in that, described self-contained pressure regulator (3) is provided with steam-water separator (4) before with main vapour quick-closing valve (5); Between described filling generating means (11) and the filling quick-closing valve (13) steam-water separator (12) is set.
3. the power generating equipment of utilizing low-pressure saturated steam as claimed in claim 1, it is characterized in that, each pressure level of flow passage component of described filling condensing steam turbine (18) is provided with the water delivery groove, the laser hardening processing is carried out on I and II blade vapour limit, end, and the three grades of isolating plates in end are provided with the hydrophobic circular groove of dehumidifying.
4. the power generating equipment of utilizing low-pressure saturated steam as claimed in claim 1, it is characterized in that, vapour condenser (17), frequency conversion condensate pump (16), concentrated soft water station (15) are linked in sequence behind the described filling condensing steam turbine (18), exhaust steam after the acting enters vapour condenser (17), and water of condensation is sent into by frequency conversion condensate pump (16) and concentrated soft water station (15).
5. the power generating equipment of utilizing low-pressure saturated steam as claimed in claim 1 is characterized in that, also is provided with Bentley 3500 detection systems that can detect each vibration of unit, displacement and the difference that expands.
6. the power generating equipment of utilizing low-pressure saturated steam as claimed in claim 1, it is characterized in that the regulating system of described filling condensing steam turbine (18) adopts 505 digital electric-hydraulic speed regulators of U.S. WOODWARD company production and the hydraulic executing system that Siemens makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920299570XU CN201568087U (en) | 2009-12-22 | 2009-12-22 | Power generating equipment with low-pressure saturated steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920299570XU CN201568087U (en) | 2009-12-22 | 2009-12-22 | Power generating equipment with low-pressure saturated steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201568087U true CN201568087U (en) | 2010-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920299570XU Expired - Fee Related CN201568087U (en) | 2009-12-22 | 2009-12-22 | Power generating equipment with low-pressure saturated steam |
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| Country | Link |
|---|---|
| CN (1) | CN201568087U (en) |
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2009
- 2009-12-22 CN CN200920299570XU patent/CN201568087U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100901 Termination date: 20161222 |