CN203547810U - High temperature subcritical unit arranged in high and lower positions - Google Patents

High temperature subcritical unit arranged in high and lower positions Download PDF

Info

Publication number
CN203547810U
CN203547810U CN201320548936.9U CN201320548936U CN203547810U CN 203547810 U CN203547810 U CN 203547810U CN 201320548936 U CN201320548936 U CN 201320548936U CN 203547810 U CN203547810 U CN 203547810U
Authority
CN
China
Prior art keywords
pressure cylinder
intermediate pressure
valve
boiler
temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201320548936.9U
Other languages
Chinese (zh)
Inventor
冯伟忠
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to CN201320548936.9U priority Critical patent/CN203547810U/en
Application granted granted Critical
Publication of CN203547810U publication Critical patent/CN203547810U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Abstract

The utility model discloses a high temperature subcritical unit arranged in high and lower positions, which comprises a boiler with a superheater and a reheater, a steam turbine with a high pressure cylinder and an intermediate pressure cylinder, a main steam pipeline and a valve, a reheat steam pipeline and a valve and a high and an intermediate pressure by-pass valves, and is characterized in that the temperature parameter grades of the superheater and the reheater of the boiler, the high and the intermediate pressure cylinders of the steam turbine, the main steam pipe and the valve, the reheat steam pipeline and the valve and the high and the intermediate pressure by-pass valves are rated temperature or higher temperature parameter grades of an ultra supercritical unit, and the high and the intermediate pressure cylinders are arranged on the top portion of the boiler. The high temperature subcritical unit arranged in high and lower positions is relatively low in improvement cost, can greatly improve efficiency of a subcritical unit, is high in cost performance, and has obvious advantages.

Description

The high temperature Subcritical Units that a kind of high-low-position is arranged
Technical field
The utility model relates to a kind of Subcritical Units, particularly, relates to the high temperature Subcritical Units of the high-low-position layout being transformed into from traditional Subcritical Units.
Background technique
Along with the development of material technology and the growing tension of world energy sources, the advantage of the relative Subcritical Units of supercritical unit/ultra supercritical unit is also more and more embodied, and has developed into the first-selection of domestic and international new-built unit at present.Existing subcritical, overcritical, ultra supercritical unit canonical parameter is respectively 16.7MPa/538 ℃/538 ℃, 24.1MPa/538 ℃/566 ℃, 27MPa~31MPa/600 ℃/600 ℃, overcritical/ultra supercritical unit is because its steam parameter is higher, so its thermal efficiency is relatively high.Er China, in order to improve electric structure, in recent years also started " upper large pressure is little " engineering, start gradually to eliminate middle-size and small-size highly energy-consuming unit, but it is still larger that subcritical generating set capacity accounts for total electricity electric motor power proportion, existing 300MW/600MW grade Subcritical Units total amount approximately reaches 300,000,000 kilowatts, in view of its working time not long, and be subject to the condition restriction such as power supply and fund, present stage can not be closed down these relatively medium-sized units of high energy consumption, comparatively ideal solution route is that the Subcritical Units of existing 300MW/600MW grade is undergone technological transformation to reduce its energy consumption, reduce pollutant emission, can meet the demand of electrical production again simultaneously.
But at present, for the transformation of this class Subcritical Units, traditional method is confined to carry out in the framework of the original parameter grade of unit the local flow improvement of some equipment or system more, and the advantage of transformation is not obvious, and investment is not high with the cost performance of energy saving profit.And in fact, development along with material technology, present stage, by transformation Subcritical Units, promote its parameter, there is not technical problem, on the one hand, this can obviously promote unit efficiency, on the other hand also can corresponding increase power plant retrofit cost, for example, promote the pressure parameter of unit, the wall thickness of overwhelming majority e-quipment and pipe is wanted corresponding increase, or select performance and the higher material of price, comprise such as boiler, steam turbine, heater, feed water pump, the equipment unit that pipe valve etc. need bear high pressure all needs to change comprehensively, transformation face is too wide and cost is huge, and in temperature-resistant situation, only solely improve pressure parameter, although efficiency of thermal cycle increases to some extent, but because vapor volume flow declines to a great extent, the internal efficiency of steam turbine also can obviously decline, therefore, also also not obvious to the lifting of unit overall efficiency, if while adherence pressure, temperature parameter, reforming cost can further promote again.Thereby, this type of transformation, though without technical problem, its transformation cost performance is low.In view of this, those skilled in the art is devoted to develop and a kind ofly can significantly improves the retrofitted unit that Subcritical Units efficiency, the reconstruction scope appropriateness, cost performance have significant advantage.
Model utility content
In view of the demand of above-mentioned current thermal power plant Subcritical Units transformation and the deficiency of existing renovation technique, the utility model aims to provide and a kind ofly can significantly improve the Subcritical Units that Subcritical Units efficiency, cost performance have significant advantage.
For achieving the above object, the high temperature Subcritical Units that the utility model provides a kind of high-low-position to arrange, comprise the boiler with superheater and reheater, there is high-pressure cylinder, the steam turbine of intermediate pressure cylinder, main steam line and valve, heat is steam line and valve and height again, intermediate pressure by-pass valve etc., it is characterized in that, the superheater of described boiler and reheater, the high-pressure cylinder of described steam turbine, intermediate pressure cylinder, described main steam line and valve, described heat is steam line and valve and described height again, the temperature parameter grade of intermediate pressure by-pass valve is rated temperature or the higher temperature parameter grade of ultra supercritical unit.
The superheater of wherein said boiler and reheater, the high-pressure cylinder of described steam turbine, intermediate pressure cylinder, described main steam line and valve, described heat is steam line and valve and described height again, intermediate pressure by-pass valve can use high temperature austenite steel, ferrite steel, Martensite Steel or other can bear the material of higher temperature, the trade mark can be P91, T91, P122, P92, E911, FN616, HCM12, HCM12A, EM12, HCM9M, SA-387Gr22/22L, SA-387Gr91, SA-387Gr911, SA-1017Gr122, HT9 and HT91 and other can bear the trade mark of higher temperature material.
Wherein, described high-pressure cylinder and intermediate pressure cylinder are all placed in the top of described boiler, and dispose the generator of respective volume.Described ultra supercritical unit rated temperature parameter is representative temperature parameter grade, 600 ℃-620 ℃.
The utlity model has following advantage and effect:
1, the utility model, by keeping unit pressure parameter constant, promotes the temperature parameter grade of unit, and boiler side only need change superheater, reheater (primary superheater of low temperature parameter, one-level reheater still can retain constant); Steam turbine place need change high, intermediate pressure cylinder; Be main steam line, valve in addition, heat is steam line, valve again, high, intermediate pressure by-pass valve.Generally speaking, change amount is few relatively, and in addition, pressure parameter is constant, and the wall thickness of pipeline also can be controlled, thereby total transformation face appropriateness, and cost performance is high.
2, the utility model has significantly promoted the temperature parameter of unit, on the one hand, can significantly promote unit thermal efficiency of cycle; On the one hand, in the situation that unit capacity is certain, pressure is constant in addition, and the lifting of temperature increases steam specific volume, and the internal efficiency of steam turbine also can correspondingly promote.
3, the utility model changes high, intermediate pressure cylinder because promoting unit temperature parameter, in identical reforming cost, also can obtain the income of current advanced person's the technology such as inner cylinder steam admission mode, flow passage component, blade profile optimization.For the height of 600MW grade, the internal efficiency of intermediate pressure cylinder, can be promoted to 92%, more than 94%.
4, the utility model does not change unit pressure parameter, and control mode, the method for operation of unit all do not change yet, and concerning unit operation personnel, its operation theory is also substantially unchanged.
5, the utility model also comprises reinforcement boiler foundation, the high-pressure cylinder of described Subcritical Units, intermediate pressure cylinder is all arranged on the top of described boiler, to shorten described main steam line, cold steam line again and the heat length of steam line again.This not only can greatly reduce the reforming cost of pipeline material, also can reduce the pressure drop of pipeline, further promotes unit economy.
6, the utility model can be under the prerequisite that does not increase unit fuel consumption the generated output that significantly promotes corresponding raising unit of utilization ratio, not only energy-conservation and additional income.
Below the technique effect of design of the present utility model, concrete structure and generation is described further, to understand fully the purpose of this utility model, feature and effect.
Accompanying drawing explanation
Overcritical under the equal capacity that Tu1Wei Tong manufacturer provides/ultra supercritical unit hear rate value.
Fig. 2 is the schematic diagram that the utility model embodiment one adopts minute cylinder.
Fig. 3 is the schematic diagram that cylinder is closed in the utility model embodiment one employing.
Embodiment
The high temperature Subcritical Units that the utility model provides a kind of high-low-position to arrange, comprise the boiler 1 with superheater 11 and reheater 12, there is high-pressure cylinder 21, the steam turbine 2 of intermediate pressure cylinder 22, main steam line 3 and valve, heat is steam line 4 and valve and height again, intermediate pressure by-pass valve, it is characterized in that, the superheater 11 of described boiler 1 and reheater 12, the high-pressure cylinder 21 of described steam turbine 2, intermediate pressure cylinder 22 and described main steam line 3 and valve, described heat is steam line 4 and valve and described height again, the temperature parameter grade of intermediate pressure by-pass valve is rated temperature or the higher temperature parameter grade of ultra supercritical unit.
The superheater 11 of wherein said boiler 1 and reheater 12, the high-pressure cylinder 21 of described steam turbine 2, intermediate pressure cylinder 22, described main steam line 3 and valve, described heat is steam line 4 and valve again, described height, intermediate pressure by-pass valve can use the high temperature austenite steel that is usually used at present ultra supercritical power generation unit, ferrite steel, Martensite Steel or other can bear the material of higher temperature, the trade mark can be P91, T91, P122, P92, E911, FN616, HCM12, HCM12A, EM12, HCM9M, SA-387Gr22/22L, SA-387Gr91, SA-387Gr911, SA-1017Gr122, HT9 and HT91 and other can bear the material of higher temperature.
Wherein said high-pressure cylinder 21 and intermediate pressure cylinder 22 are placed in boiler 1 top, and dispose the generator of respective volume.
The structural type of described high-pressure cylinder 21 and intermediate pressure cylinder 22 can adopt minute cylinder or close cylinder.And dispose the generator of respective volume.
Embodiment one
Take certain Subcritical Units as example, and its main steam condition design load is 16.7MPa/538 ℃, and reheat steam temperature design load is also 538 ℃, and hear rate design load is 7862KJ/KWh.
The high temperature Subcritical Units of arranging according to high-low-position of the present utility model, on its existing boiler 1 equipment, boiler 1 is installed additional to superheater 11 and the reheater 12 of being made by 600 ℃ of grade ultra supercritical power generation unit materials, simultaneously by the height of existing steam turbine 2, intermediate pressure cylinder 21 and 22, boiler is to the pipeline 3 of the main steam between steam turbine, the pipeline 4 of valve and reheat heat steam, valve and height, intermediate pressure by-pass valve is all replaced by the relevant device of 600 ℃ of grade ultra supercritical power generation units, unit design pressure is constant, remain on 16.7MPa, and by main steam, the design temperature value of reheated steam all rises to 600 ℃.
(600 ℃ temperature-resistant under) the hear rate value of different pressures and hear rate design load 7602KJ/KWh of supercritical unit (23.96MPa/538 ℃/566 ℃) during ultra supercritical unit sliding pressure operation under the equal capacity unit providing according to same manufacturer, as shown in Figure 1.Utilize interpolation, the unit hear rate value that easily obtains improved high temperature Subcritical Units (steam parameter 16.7MPa/600 ℃/600 ℃) is about 7492KJ/KWh.As can be seen here, by the present invention, traditional Subcritical Units is transformed into high temperature Subcritical Units, can make its hear rate value be reduced to 7492KJ/KWh by former 7862KJ/KWh, and this hear rate level is obviously better than the supercritical unit of same manufacturer, be only second to current ultra supercritical unit.
In addition, by strengthening boiler foundation, high-pressure cylinder 21 and intermediate pressure cylinder 22 are all placed on boiler top 1, and configure the generator of respective volume.The structural type of high-pressure cylinder 21, intermediate pressure cylinder 22 can adopt a minute cylinder, close cylinder, respectively as Fig. 2, as shown in Figure 3, from boiler superheater main steam out, directly enter the high-pressure cylinder acting boiler top, the steam discharge of high-pressure cylinder is that cold steam again enters boiler reheater and further absorbs heat, and the intermediate pressure cylinder that steam enters on boiler top more again of the heat after heat absorption continues acting.Then the steam discharge of intermediate pressure cylinder enters the low pressure (LP) cylinder acting that is arranged in conventional steam turbine generator firing floor again.The structural type of high-pressure cylinder 21, intermediate pressure cylinder 22 can be minute cylinder or closes cylinder according to different capacitance grade, and respectively as shown in Figure 2 and Figure 3, the steam turbine that wherein A is ordered comprises high-pressure cylinder 21 and intermediate pressure cylinder 22, and the steam turbine that B is ordered comprises low pressure (LP) cylinder 23.
This mode of execution has greatly shortened main steam line, cold steam line again, heat steam line again, not only reduced high alloy pipeline cost of material, and reduced pressure and the radiation loss of main steam, reheaing steam pipe, and be converted to hear rate, can be 7464KJ/KWh.
More than describe preferred embodiment of the present utility model in detail.The ordinary skill that should be appreciated that related domain just can be made many modifications and variations according to design of the present utility model without creative work.Therefore, all technician in the art comply with design of the present utility model on the basis of existing technology by the available technological scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.

Claims (5)

1. the high temperature Subcritical Units that a high-low-position is arranged, comprise the boiler with superheater and reheater, there is high-pressure cylinder, the steam turbine of intermediate pressure cylinder, main steam line and valve, heat is steam line and valve and height again, intermediate pressure by-pass valve, it is characterized in that, the superheater of described boiler and reheater, the high-pressure cylinder of described steam turbine, intermediate pressure cylinder, described main steam line and valve, described heat is steam line and valve and described height again, the temperature parameter grade of intermediate pressure by-pass valve is rated temperature or the higher temperature parameter grade of ultra supercritical unit, wherein said high-pressure cylinder and intermediate pressure cylinder are all placed in boiler top.
2. the high temperature Subcritical Units that high-low-position as claimed in claim 1 is arranged, it is characterized in that, the superheater of described boiler and reheater, the high-pressure cylinder of described steam turbine and intermediate pressure cylinder, described main steam line and valve, described heat is steam line and valve and described height, intermediate pressure by-pass valve use high temperature austenite steel, ferrite steel or Martensite Steel again, and the trade mark is P91, T91, P122, P92, E911, FN616, HCM12, HCM12A, EM12, HCM9M, SA-387Gr22/22L, SA-387Gr91, SA-387Gr911, SA-1017Gr122, HT9 or HT91.
3. the high temperature Subcritical Units that high-low-position as claimed in claim 2 is arranged, is characterized in that, described high-pressure cylinder and intermediate pressure cylinder are placed in described boiler top, and dispose the generator of respective volume.
4. the high temperature Subcritical Units that high-low-position as claimed in claim 3 is arranged, is characterized in that, the structural type of described high-pressure cylinder and intermediate pressure cylinder can adopt minute cylinder or close cylinder.
5. the high temperature Subcritical Units that high-low-position as claimed in claim 4 is arranged, is characterized in that, described ultra supercritical unit rated temperature parameter is representative temperature parameter grade, 600 ℃-620 ℃.
CN201320548936.9U 2013-09-04 2013-09-04 High temperature subcritical unit arranged in high and lower positions Expired - Lifetime CN203547810U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320548936.9U CN203547810U (en) 2013-09-04 2013-09-04 High temperature subcritical unit arranged in high and lower positions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320548936.9U CN203547810U (en) 2013-09-04 2013-09-04 High temperature subcritical unit arranged in high and lower positions

Publications (1)

Publication Number Publication Date
CN203547810U true CN203547810U (en) 2014-04-16

Family

ID=50465939

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320548936.9U Expired - Lifetime CN203547810U (en) 2013-09-04 2013-09-04 High temperature subcritical unit arranged in high and lower positions

Country Status (1)

Country Link
CN (1) CN203547810U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104832227A (en) * 2015-02-05 2015-08-12 东方电气股份有限公司 Coal-fired unit efficient subcritical system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104832227A (en) * 2015-02-05 2015-08-12 东方电气股份有限公司 Coal-fired unit efficient subcritical system

Similar Documents

Publication Publication Date Title
CN203685322U (en) Steam extraction heat supply system for 350MW supercritical heat supply unit
CN102787870B (en) Method for improving primary frequency modulation capacity of heat supply unit
CN103363512B (en) A kind of system improving boiler start inlet water temperature
CN202300550U (en) High pressure cylinder pre-warming system
CN104421922B (en) Modifying method for subcritical unit
CN103195521A (en) Double-turbine steam thermodynamic system with regenerative steam extraction function
CN102116469A (en) Water supply and drainage system for medium-pressure heater of power plant
CN112856363B (en) System and method for improving heat supply steam parameters of deep peak shaving heat supply unit
CN106321175A (en) Coal gas power generation system for steel mills
CN106321174A (en) Power generation system utilizing waste heat of high-temperature flue gas
CN204552846U (en) A kind of back pressure steam turbines utilization system
CN204419282U (en) A kind of high temperature Subcritical Units
CN106437875A (en) Thermal power generating unit working medium shunting circulation peak shaving system
CN205172657U (en) Double reheat ultra supercritical unit by transformation of subcritical coal -fired generating set
CN203489712U (en) Novel generating equipment with integrated application of waste heat in sintering, steel making and steel rolling
CN203547811U (en) Improved high temperature subcritical unit
CN203239405U (en) Double-machine regeneration stream extraction thermodynamic system
CN205047259U (en) System for be used for turbine unit extraction steam for factories to subtract temperature
CN203547810U (en) High temperature subcritical unit arranged in high and lower positions
CN206539379U (en) Cogeneration units depth peak regulation system is improved using regenerative apparatus heat supply
CN205400830U (en) 300MW grade fire coal is taken out combined heat and power units restriction steam extraction improvement heat supply with fixed attention and is compared system
CN206144612U (en) Utilize supercritical unit to realize high pressure cylinder steam extracting and heat supplying combined heat and power generation system
CN202361356U (en) Electric heating steam heat storage device
CN211524914U (en) Power cogeneration energy-saving power generation system based on steam staged heating
CN205535726U (en) Boiler thermodynamic system

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20140416

CX01 Expiry of patent term