CN114413637A - Heat storage peak regulation device, waste heat power generation system and method - Google Patents

Heat storage peak regulation device, waste heat power generation system and method Download PDF

Info

Publication number
CN114413637A
CN114413637A CN202210067017.3A CN202210067017A CN114413637A CN 114413637 A CN114413637 A CN 114413637A CN 202210067017 A CN202210067017 A CN 202210067017A CN 114413637 A CN114413637 A CN 114413637A
Authority
CN
China
Prior art keywords
valve
flue
steam
branch
waste heat
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.)
Granted
Application number
CN202210067017.3A
Other languages
Chinese (zh)
Other versions
CN114413637B (en
Inventor
张金鑫
薛晓迪
董子健
王丽
牛晓磊
邢至珏
邢玉民
张彦军
杨小强
李转如
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.)
Beijing Si'an Comprehensive Energy Development Co ltd
Original Assignee
Beijing Si'an Comprehensive Energy Development Co ltd
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 Beijing Si'an Comprehensive Energy Development Co ltd filed Critical Beijing Si'an Comprehensive Energy Development Co ltd
Priority to CN202210067017.3A priority Critical patent/CN114413637B/en
Publication of CN114413637A publication Critical patent/CN114413637A/en
Application granted granted Critical
Publication of CN114413637B publication Critical patent/CN114413637B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01D15/10—Adaptations for driving, or combinations with, electric generators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K3/00—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein
    • F01K3/18—Plants characterised by the use of steam or heat accumulators, or intermediate steam heaters, therein having heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
    • F22B33/18—Combinations of steam boilers with other apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/006—Systems for reclaiming waste heat using a boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F27D2017/007—Systems for reclaiming waste heat including regenerators
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
    • Y02P40/121—Energy efficiency measures, e.g. improving or optimising the production methods

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

The invention belongs to the technical field of cascade utilization of waste heat and waste energy, and discloses a heat storage and peak regulation device, a waste heat power generation system and a method; the heat-storage peak shaving device comprises: a steam heating device and a heat storage body; the outlet end of the kiln head hot air pipe is divided into two paths: the first branch of the outlet of the kiln head hot air pipe is connected with one end of a first valve of the flue, and the second branch of the outlet of the kiln head hot air pipe is connected with one end of a second valve of the flue; the other end of the second flue valve is connected with one end of a third flue valve, and the other end of the third flue valve is divided into two paths: the first branch at the other end of the third flue valve is connected with the flue at one end of the fifth flue valve through the fourth flue valve and the heat storage body which are connected in series; and a second branch at the other end of the third valve is connected with one end of a tenth flue valve through a sixth flue valve and a first gas heat exchange channel of the steam heating device which are connected in series. The invention can increase the generating power of the steam turbine set, and simultaneously can enable the cement kiln waste heat generating system to have the peak shaving function, and simultaneously, the flexibility is better.

Description

Heat storage peak regulation device, waste heat power generation system and method
Technical Field
The invention belongs to the technical field of cascade utilization of waste heat and waste energy, and particularly relates to a heat storage peak regulation device, a waste heat power generation system and a waste heat power generation method.
Background
The cement rotary kiln waste heat power generation is a method for carrying out heat exchange recovery on a large amount of waste gas waste heat discharged from the kiln head and the kiln tail of a cement kiln by a waste heat recovery device, namely a waste heat boiler, and generating superheated steam to push a steam turbine to realize conversion of heat energy into mechanical energy so as to drive a generator to generate electric energy in the production of a novel dry cement clinker production line; the electric energy generated by the waste heat power generation of the rotary cement kiln is used in the cement production process.
Because the kiln tail flue gas temperature of the cement rotary kiln is generally lower, the superheat degree of steam generated by the waste heat boiler is also lower, the steam entering the steam turbine in the steam distributing cylinder at the front side is mixed with the steam with higher superheat degree generated by the kiln head waste heat boiler, so that the superheat degree of the steam entering the steam turbine is not high and is far lower than the design value required by the steam turbine inlet, the efficiency in the steam turbine is greatly reduced, and the power generation power of an actual steam turbine unit is not improved.
The low power of the steam turbine generator unit of the existing cement kiln waste heat and complementary energy power station cannot be improved, and the peak shaving capacity is not available; or the peak shaving capacity is low and inflexible.
Disclosure of Invention
The invention aims to provide a heat storage peak regulation device, a waste heat power generation system and a method, which aim to solve the problem that the existing cement kiln waste heat power generation system has no peak regulation capability; or the peak regulation capability is low and the technology is not flexible. The system and the method for increasing the power generation capacity of the waste heat of the cement kiln by heat storage and peak shaving can increase the power generation power of the steam turbine set, and simultaneously enable the power generation system of the waste heat of the cement kiln to have the peak shaving function and have better flexibility.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a first aspect, the present invention provides a heat storage peak shaving apparatus, comprising: a steam heating device and a heat storage body;
the outlet end of the kiln head hot air pipe is divided into two paths: a first branch at the outlet of the kiln head hot air pipe and a second branch at the outlet of the kiln head hot air pipe; the first branch of the outlet of the kiln head hot air pipe is connected with one end of a first valve of the flue, and the second branch of the outlet of the kiln head hot air pipe is connected with one end of a second valve of the flue;
the other end of the second flue valve is connected with one end of a third flue valve, and the other end of the third flue valve is divided into two paths: the first branch at the other end of the third flue valve and the second branch at the other end of the third flue valve are connected with the first branch; the first branch at the other end of the third flue valve is connected with the flue at one end of the fifth flue valve through the fourth flue valve and the heat storage body which are connected in series; a second branch at the other end of the third valve is connected with one end of a tenth flue valve through a sixth flue valve and a gas-steam heat exchange channel of the steam heating device which are connected in series;
the invention further improves the following steps: the flue at the other end of the heat storage body is divided into two paths: a first branch of a flue at the other end of the heat storage body and a second branch of a flue at the other end of the heat storage body; a first branch of a flue at the other end of the heat storage body is connected with one end of a fifth valve of the flue; a second branch of the flue at the other end of the heat storage body is connected with one end of an eleventh valve of the flue;
the other end of the fifth valve of the flue is divided into two paths: a first branch at the other end of the fifth valve of the flue and a second branch at the other end of the fifth valve of the flue; a first branch at the other end of the fifth flue valve is connected with one end of the induced draft fan, and a second branch at the other end of the fifth flue valve is connected with one end of the eighth flue valve;
the other end of the eleventh valve of the flue is divided into two paths: a first branch at the other end of the eleventh flue valve and a second branch at the other end of the eleventh flue valve; a first branch at the other end of the eleventh valve of the flue is connected with the inlet end of an induced draft fan; a second branch at the other end of the eleventh flue valve is connected with a seventh flue valve;
the other end of the tenth valve of the flue is divided into two paths: the first branch at the other end of the tenth flue valve and the second branch at the other end of the tenth flue valve are connected with the first branch and the second branch respectively; the first branch at the other end of the tenth flue valve is connected with the other end of the eighth valve, and the second branch at the other end of the tenth flue valve is connected with one end of the ninth flue valve.
The invention further improves the following steps: and a cyclone dust collector is arranged between the other end of the second flue valve and the third flue valve.
In a second aspect, the present invention provides a cogeneration system, comprising: the system comprises a heat storage peak regulation device, a kiln head waste heat boiler, a steam distribution cylinder and a steam turbine;
the other end of the first valve of the flue and the other end of the ninth valve of the flue are connected with a hot air inlet of the kiln head waste heat boiler;
the hot air outlet of the kiln head waste heat boiler is divided into two paths: a first branch of a hot air outlet of the kiln head waste heat boiler and a second branch of the hot air outlet of the kiln head waste heat boiler; a second branch of a hot air outlet of the kiln head waste heat boiler is connected with the inlet end of the induced draft fan through a seventh valve of the flue;
a water supply inlet of the kiln head waste heat boiler is connected with a boiler water supply pipe; a steam outlet of the kiln head waste heat boiler is connected with a first steam inlet of the steam distributing cylinder; the steam outlet of the steam distributing cylinder is connected with the steam inlet of the steam turbine.
The invention further improves the following steps: the first branch of the hot air outlet of the kiln head waste heat boiler is sequentially connected with a dust remover, an induced draft fan and a chimney.
The invention further improves the following steps: further comprising: a kiln tail waste heat boiler;
the outlet end of the kiln tail hot air pipe is connected with a hot air inlet of a kiln tail waste heat boiler; the outlet of the boiler water supply pipe is connected with the water inlet of the kiln tail waste heat boiler, and the steam outlet of the kiln tail waste heat boiler is divided into two paths: a first branch of a steam outlet of the kiln tail waste heat boiler and a second branch of the steam outlet of the kiln tail waste heat boiler; a first branch of a steam outlet of the kiln tail waste heat boiler is connected with one end of a second valve of the steam pipeline; a second branch of a steam outlet of the kiln tail waste heat boiler is connected with one end of a first valve of a steam pipeline;
the other end of the second valve of the steam pipeline is connected with one end of a third valve of the steam pipeline through a gas-steam heat exchange channel of the steam heating device, and the other end of the third valve and the other end of the first valve of the steam pipeline are connected with a second steam inlet of the steam-distributing cylinder.
In a third aspect, the present invention provides a waste heat power generation method, including:
closing the second valve of the flue, the seventh valve of the flue and the ninth valve of the flue; opening a first valve of the flue; closing the second valve and the third valve of the steam pipeline, and opening the first valve of the steam pipeline;
the kiln head hot air enters the kiln head waste heat boiler through a first valve of the flue, and is discharged to the atmosphere from the kiln head waste heat boiler after heat exchange; boiler feed water is heated by a kiln head waste heat boiler to generate steam to a steam distributing cylinder;
the kiln tail hot flue gas enters a kiln tail waste heat boiler, and is discharged from the kiln tail waste heat boiler after heat exchange; boiler feed water is heated by a kiln tail waste heat boiler to be steam and enters the steam distributing cylinder;
and the mixed steam enters a steam turbine from the steam distributing cylinder to drive a generator to generate power.
In a fourth aspect, the present invention provides a waste heat power generation method, including:
closing the fifth valve, the sixth valve, the seventh valve and the tenth valve of the flue; opening a first valve, a second valve, a third valve, a fourth valve, a fifth valve, an eighth valve, a ninth valve and a tenth valve of the flue; closing the second valve and the third valve of the steam pipeline, and opening the first valve of the steam pipeline;
the kiln head hot air enters the heat storage body for heat storage and then enters the waste heat boiler; boiler feed water is heated by a kiln head waste heat boiler to generate steam to a steam distributing cylinder;
the kiln tail hot flue gas enters a kiln tail waste heat boiler, and is discharged from the kiln tail waste heat boiler after heat exchange; boiler feed water is heated by a kiln tail waste heat boiler to be steam and enters the steam distributing cylinder;
and the mixed steam enters a steam turbine from the steam distributing cylinder to drive a generator to generate power.
In a fifth aspect, the present invention provides a waste heat power generation method, including:
closing the second valve, the third valve of the flue, the eighth valve of the flue and the eleventh valve of the flue; opening a first flue valve, a fourth flue valve, a fifth flue valve, a sixth flue valve, a seventh flue valve, a ninth flue valve and a tenth flue valve; opening a second valve of the steam pipeline and a third valve of the steam pipeline, and closing a first valve of the steam pipeline;
the induced draft fan sends waste gas discharged by the kiln head waste heat boiler into the heat storage body to get heat, hot air after heat getting enters the steam heating device to heat steam sent by the kiln tail waste heat boiler again, the hot air after heat getting is mixed with the kiln head hot air of the original flue, and the mixed hot air enters the waste heat boiler; boiler feed water is heated by a kiln head waste heat boiler to generate steam to a steam distributing cylinder;
the kiln tail hot flue gas enters a kiln tail waste heat boiler, and is discharged from the kiln tail waste heat boiler after heat exchange; boiler feed water is heated by a kiln tail waste heat boiler to form steam, the steam enters a steam heating device for further heat exchange, and then enters a steam distributing cylinder;
and the mixed steam enters a steam turbine from the steam distributing cylinder to drive a generator to generate power.
Compared with the prior art, the invention has the following beneficial effects:
the invention aims to provide a heat storage peak regulation device, a waste heat power generation system and a method, wherein the heat storage peak regulation device is arranged on the technology of the existing waste heat power generation system; according to the requirement of actual working conditions, when the power generation is sufficient, the heat of the redundant kiln head hot air pipe can be stored in the heat reservoir; when the generated energy is insufficient, the heat in the heat reservoir can be utilized through circulation, so that the degree of superheat of steam is increased, and the generated energy is improved. The invention can promote the utilization of stored energy by users, increase efficiency and save cost, and simultaneously achieve the purposes of emission reduction and carbon reduction.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a heat storage peak shaving apparatus according to the present invention;
fig. 2 is a schematic structural diagram of a cogeneration system according to the present disclosure.
Detailed Description
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The following detailed description is exemplary in nature and is intended to provide further details of the invention. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.
Example 1
Referring to fig. 1, the present invention provides a heat storage peak shaving device, including: a steam heating device E5, a cyclone E6 and a heat storage body E7;
the outlet end of the kiln head hot air pipe is divided into two paths: a first branch at the outlet of the kiln head hot air pipe and a second branch at the outlet of the kiln head hot air pipe; the first branch of the outlet of the kiln head hot air pipe is connected with one end of a first valve A1 of the flue, and the second branch of the outlet of the kiln head hot air pipe is connected with one end of a second valve A2 of the flue; the other end of the second flue valve A2 is connected with one end of a third flue valve A3 through a series cyclone E6, and the other end of the third flue valve A3 is divided into two paths: the first branch at the other end of the third flue valve and the second branch at the other end of the third flue valve are connected with the first branch; the first branch at the other end of the third flue valve is connected with a flue at one end of a fifth flue valve A5 through a fourth flue valve A4 and a heat storage body E7 which are connected in series; the second branch at the other end of the third valve is connected with one end of a tenth flue valve A10 through a sixth flue valve A6 and a gas-steam heat exchange channel of a steam heating device E5 which are connected in series. The flue at the other end of the heat storage body E7 is divided into two paths: a first branch flue at the other end of the heat storage body E7 and a second branch flue at the other end of the heat storage body E7; a first branch of the flue at the other end of the heat storage body E7 is connected with one end of a fifth valve A5 of the flue; the second branch of the flue at the other end of the heat storage body E7 is connected with one end of an eleventh valve A11 of the flue. The other end of the fifth flue valve A5 is divided into two paths: a first branch at the other end of the fifth valve of the flue and a second branch at the other end of the fifth valve of the flue; a first branch at the other end of the fifth flue valve is connected with the outlet end of the induced draft fan E8, and a second branch at the other end of the fifth flue valve is connected with one end of an eighth flue valve A8; the other end of the tenth flue valve A10 is divided into two paths: the first branch at the other end of the tenth flue valve and the second branch at the other end of the tenth flue valve are connected with the first branch and the second branch respectively; the first branch at the other end of the tenth valve of the flue is connected with the other end of the eighth valve A8, and the second branch at the other end of the tenth valve of the flue is connected with one end of the ninth valve A9 of the flue. The other end of the eleventh flue valve A11 is divided into two paths: a first branch at the other end of the eleventh flue valve and a second branch at the other end of the eleventh flue valve; a first branch at the other end of the eleventh valve of the flue is connected with the inlet end of an induced draft fan E8; and the second branch at the other end of the eleventh flue valve is connected with a seventh flue valve A7.
The steam heating device E5 has the function of heating the steam sent by the kiln tail waste heat boiler, and the superheat degree of the steam is improved.
The function of the heat storage body E7 is to store the heat of the kiln head hot air.
The cyclone E6 has the function of separating dust in the hot air in the kiln head and keeping the interior of the heat storage body clean.
The function of the induced draft fan E8 is to provide power for the flow of the kiln head hot air.
The functions of the flue valves A1, A2, A3, A4, A5, A6, A7, A8, A9, A10 and A11 are to control the flow direction of the hot air at the kiln head by controlling the opening and closing of the valves.
Example 2
Referring to fig. 2, the present invention provides a waste heat power generation system, including: the system comprises a heat storage peak shaving device, a kiln head waste heat boiler E4, a kiln tail waste heat boiler E12, a steam separation cylinder E3, a steam turbine E2 and a generator E1.
The outlet end of the kiln head hot air pipe is divided into two paths: a first branch at the outlet of the kiln head hot air pipe and a second branch at the outlet of the kiln head hot air pipe; the first branch of the outlet of the kiln head hot air pipe is connected with a hot air inlet of a kiln head waste heat boiler E4 through a first flue valve A1, and the second branch of the outlet of the kiln head hot air pipe is connected with one end of a second flue valve A2; the other end of the second flue valve A2 is connected with one end of a third flue valve A3 through a series cyclone E6, and the other end of the third flue valve A3 is divided into two paths: the first branch at the other end of the third flue valve and the second branch at the other end of the third flue valve are connected with the first branch; the first branch at the other end of the third flue valve passes through a fourth flue valve A4 and a heat storage body E7 which are connected in series; the second branch at the other end of the third valve is connected with one end of a tenth flue valve A10 through a sixth flue valve A6 and a gas-steam heat exchange channel of a steam heating device E5 which are connected in series. The flue at the other end of the heat storage body E7 is divided into two paths: a first branch circuit at the other end of the heat storage body E7 and a second branch circuit at the other end of the heat storage body E7; the first branch at the other end of the heat storage body E7 is connected with one end of a fifth valve A5 of the flue; the second branch at the other end of the heat storage body E7 is connected with one end of an eleventh valve A11 of the flue. The other end of the fifth flue valve A5 is divided into two paths: a first branch at the other end of the fifth valve of the flue and a second branch at the other end of the fifth valve of the flue; a first branch at the other end of the fifth flue valve is connected with the outlet end of the induced draft fan E8, and a second branch at the other end of the fifth flue valve is connected with one end of an eighth flue valve A8; the other end of the tenth flue valve A10 is divided into two paths: the first branch at the other end of the tenth flue valve and the second branch at the other end of the tenth flue valve are connected with the first branch and the second branch respectively; the first branch at the other end of the tenth flue valve is connected with the other end of the eighth valve A8, the second branch at the other end of the tenth flue valve is connected with one end of a ninth flue valve A9, and the other end of the ninth flue valve A9 is connected with a hot air inlet of a kiln head waste heat boiler E4. The other end of the eleventh flue valve A11 is divided into two paths: a first branch at the other end of the eleventh flue valve and a second branch at the other end of the eleventh flue valve; a first branch at the other end of the eleventh valve of the flue is connected with the inlet end of an induced draft fan E8; and the second branch at the other end of the eleventh flue valve is connected with a seventh flue valve A7.
The hot air outlet of the kiln head waste heat boiler E4 is divided into two paths: a first branch of a hot air outlet of the kiln head waste heat boiler and a second branch of the hot air outlet of the kiln head waste heat boiler; the first branch of the hot air outlet of the kiln head waste heat boiler is sequentially connected with a dust remover E9, an induced draft fan E10 and a chimney E11; and a second branch of a hot air outlet of the kiln head waste heat boiler is connected with a seventh valve A7 of the flue.
A water supply inlet of the kiln head waste heat boiler E4 is connected with a boiler water supply pipe; and a steam outlet of the kiln head waste heat boiler E4 communicated with the feed water inlet is connected with a first steam inlet of the steam-splitting cylinder E3.
The outlet end of the kiln tail hot air pipe is connected with a hot air inlet of a kiln tail waste heat boiler E12; the outlet of the boiler water supply pipe is connected with the water inlet of a kiln tail waste heat boiler E12, and the steam outlet of the kiln tail waste heat boiler E12 is divided into two paths: a first branch of a steam outlet of the kiln tail waste heat boiler and a second branch of the steam outlet of the kiln tail waste heat boiler; a first branch of a steam outlet of the kiln tail waste heat boiler is connected with one end of a second valve S2 of the steam pipeline; and a second branch of a steam outlet of the kiln tail waste heat boiler is connected with one end of a first valve S1 of a steam pipeline.
The other end of the second valve S2 is connected to one end of the third valve S3 through the second heat exchange path of the steam heating device E5, and the other end of the third valve S3 and the other end of the first valve S1 are connected to the second steam inlet of the steam-splitting cylinder E3. The steam outlet of the steam dividing cylinder E3 is connected with the steam inlet of a steam turbine E2; an output shaft of the turbine E2 is connected with a generator E1.
Example 3
When peak regulation is not needed, the invention provides a waste heat power generation method, which comprises the following steps:
the smoke side of the kiln head waste heat boiler is as follows: and flue valves A2, A7 and A9 are closed, kiln head hot air enters a kiln head waste heat boiler E4 through a valve A1, and the kiln head hot air is exhausted to the atmosphere through a dust remover E9, an induced draft fan E10 and a chimney E11 after being exhausted from the boiler.
The steam-water side of the kiln head waste heat boiler: boiler feed water is heated by a kiln head waste heat boiler E4 to generate steam to a steam distribution cylinder E3.
Kiln tail waste heat boiler smoke side: the hot flue gas enters a kiln tail waste heat boiler E12, and the kiln tail flue gas is discharged from the boiler and then goes to other processes.
And (3) steam-water side of a kiln tail waste heat boiler: the steam pipeline valves S2, S3 are closed, and S1 is opened; boiler feed water is heated by a kiln tail waste heat boiler E12 to generate steam for power generation, and the steam also enters a steam-distributing cylinder E3; the degree of superheat of the steam is not high.
The turbo generator set side: the mixed steam enters a steam turbine E2 from a steam distributing cylinder E3, and exhaust steam is discharged from the tail of the steam turbine; the turbine E2 drives the generator E1 to generate electric power.
The method is the existing waste heat and waste energy power generation method, the temperature of the smoke of the kiln tail waste heat boiler is not high, the superheat degree of the generated steam is not high, the whole steam parameters are reduced after the smoke is mixed with the steam with higher parameters at the kiln head, the effective enthalpy drop is small, the flow is insufficient, and the power generation power of a steam turbine is not high. The invention can realize the existing waste heat and complementary energy power generation method by matching the switches of the flue valve and the waterway valve.
Example 4
The invention provides a method for increasing the power generation capacity of waste heat of a cement kiln by peak shaving and heat charging of a heat storage body when peak shaving is needed, which comprises the following steps:
the smoke side of the kiln head waste heat boiler is as follows: flue valves A5, A6, A7 and A10 are closed, flue valves A1, A2, A3, A4, A8, A9 and A11 are opened, kiln head hot air passes through a cyclone dust collector E6 and enters a heat storage body E7, an induced draft fan E8 determines the conveying flow according to peak regulation working condition parameters, the induced draft fan E8 is subjected to frequency conversion control, the hot air after heat storage returns to an original flue and is mixed with high-temperature kiln head hot air, the hot air enters a waste heat boiler E4, kiln head hot air waste gas for heating water is heated, and the kiln head hot air waste gas is exhausted to the atmosphere through a dust collector E9, the induced draft fan E10 and a chimney E11.
The steam-water side of the kiln head waste heat boiler: boiler feed water is heated by a kiln head waste heat boiler E4 to generate steam to a steam distribution cylinder E3; the temperature of the flue gas entering the waste heat boiler is reduced, so that the steam parameters are reduced.
Kiln tail waste heat boiler smoke side: the hot flue gas enters a kiln tail waste heat boiler E12, and the kiln tail flue gas is discharged from the boiler and then goes to other processes.
And (3) steam-water side of a kiln tail waste heat boiler: the steam pipeline valves S2, S3 are closed, and S1 is opened; boiler feed water is heated by a kiln tail waste heat boiler E12 to generate steam for power generation, and the steam also enters a steam distribution cylinder E3.
The turbo generator set side: the mixed steam enters a steam turbine E2 from a steam distributing cylinder E3, and exhaust steam is discharged from the tail of the steam turbine; the turbine E2 drives the generator E1 to generate electric power.
In this embodiment, under the heat storage body heat filling operating mode, through the hot-blast heat of storage kiln head, the steam parameter of kiln head exhaust-heat boiler output is reduced to a certain extent, makes turbo generator set generated energy reduce to some extent.
Example 5
When peak shaving is needed and the heat storage body releases heat, the invention provides a method for increasing the power generation capacity by the waste heat of a cement kiln by heat storage peak shaving, which comprises the following steps:
the smoke side of the kiln head waste heat boiler is as follows: flue valves A2, A3, A8 and A11 are closed, flue valves A1, A4, A5, A6, A7, A9 and A10 are opened, an induced draft fan E8 sends waste gas discharged by a kiln head waste heat boiler E4 into a heat storage body E7 for heat extraction, hot air after heat extraction enters a steam heating device E5, steam sent by a kiln tail waste heat boiler is reheated, the hot air is mixed with hot air at the kiln head of an original flue, the mixed hot air enters a waste heat boiler E4, kiln head hot air waste gas for heating water is exhausted to the atmosphere through a dust remover E9, an induced draft fan E10 and a chimney E11.
The steam-water side of the kiln head waste heat boiler: boiler feed water is heated by a kiln head waste heat boiler E4 to generate steam to a steam distribution cylinder E3. Because the amount of the flue gas entering the waste heat boiler is increased, the steam production amount of the boiler is correspondingly increased.
Kiln tail waste heat boiler smoke side: the hot flue gas enters a kiln tail waste heat boiler E12, and the kiln tail flue gas is discharged from the boiler and then goes to other processes.
And (3) steam-water side of a kiln tail waste heat boiler: the steam pipeline valves S2, S3 are opened, and S1 is closed; feeding water to the boiler, heating by using a kiln tail waste heat boiler E12 to generate steam with low superheat degree, enabling the steam to enter a steam heating device E5, and enabling the heated steam to enter a steam distributing cylinder E3; the superheat degree of steam entering the steam distributing cylinder at the tail of the kiln is improved.
The turbo generator set side: the mixed steam enters a steam turbine E2 from a steam distributing cylinder E3, and exhaust steam is discharged from the tail of the steam turbine; the turbine E2 drives the generator E1 to generate electric energy; the steam quantity is increased, and the steam parameters after mixing are improved compared with the prior art, so that the steam engine can be fully or even over-run.
In the embodiment, the heat storage body is used for heating the steam with lower superheat degree sent by the kiln tail waste heat boiler by releasing the stored heat, the steam parameter is improved to be close to the steam parameter generated by the kiln head waste heat boiler, the steam enthalpy value of the steam turbine inlet is increased by improving the mixed steam parameter, the low-pressure level humidity of the steam turbine is reduced, the level efficiency of the steam turbine is increased, the generating power of a steam turbine set is improved, and the generating capacity of a system is increased; meanwhile, the increase of partial steam amount enables the steam inlet amount of the steam turbine to reach or even exceed the rated steam inlet amount of the steam turbine, and full generation or even over generation of the steam turbine generator unit is realized.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims (9)

1. A heat-storage peak shaving apparatus, comprising: a steam heating device (E5) and a heat storage body (E7);
the outlet end of the kiln head hot air pipe is divided into two paths: a first branch at the outlet of the kiln head hot air pipe and a second branch at the outlet of the kiln head hot air pipe; the first branch of the outlet of the kiln head hot air pipe is connected with one end of a first valve (A1) of the flue, and the second branch of the outlet of the kiln head hot air pipe is connected with one end of a second valve (A2) of the flue;
the other end of the second flue valve (A2) is connected with one end of a third flue valve (A3), and the other end of the third flue valve (A3) is divided into two paths: the first branch at the other end of the third flue valve and the second branch at the other end of the third flue valve are connected with the first branch; the first branch at the other end of the third flue valve is connected with a flue at one end of a fifth flue valve (A5) through a fourth flue valve (A4) and a heat storage body (E7) which are connected in series; the second branch at the other end of the third valve is connected with one end of a tenth flue valve (A10) through a sixth flue valve (A6) and a first gas heat exchange channel of a steam heating device (E5) which are connected in series.
2. The heat-storage peak shaving device according to claim 1, wherein one end of the heat storage body (E7) is connected with a fourth valve (A4), and the flue at the other end of the heat storage body (E7) is divided into two paths: a first branch flue at the other end of the heat storage body (E7) and a second branch flue at the other end of the heat storage body (E7); a first branch of the flue at the other end of the heat storage body (E7) is connected with one end of a fifth valve (A5) of the flue; a second branch of the flue at the other end of the heat storage body (E7) is connected with one end of an eleventh valve (A11) of the flue;
the other end of the fifth valve (A5) of the flue is divided into two paths: a first branch at the other end of the fifth valve of the flue and a second branch at the other end of the fifth valve of the flue; a first branch at the other end of the fifth flue valve is connected with the outlet end of an induced draft fan (E8), and a second branch at the other end of the fifth flue valve is connected with one end of an eighth flue valve (A8);
the other end of the tenth valve (A10) of the flue is divided into two paths: the first branch at the other end of the tenth flue valve and the second branch at the other end of the tenth flue valve are connected with the first branch and the second branch respectively; a first branch at the other end of the tenth flue valve is connected with the other end of the eighth valve (A8), and a second branch at the other end of the tenth flue valve is connected with one end of a ninth flue valve (A9);
the other end of the eleventh valve (A11) of the flue is divided into two paths: a first branch at the other end of the eleventh flue valve (A11) and a second branch at the other end of the eleventh flue valve (A11); a first branch at the other end of the eleventh valve (A11) of the flue is connected with the inlet end of an induced draft fan (E8); the second branch at the other end of the eleventh flue valve (A11) is connected with one end of a seventh flue valve (A7).
3. The heat-storage peak shaving apparatus according to claim 2, wherein a cyclone (E6) is installed between the other end of the second flue valve (A2) and the third flue valve (A3).
4. A cogeneration system, comprising: the heat-storage peak shaving device, the kiln head waste heat boiler (E4), the steam-splitting cylinder (E3) and the steam turbine (E2) of claim 2;
the other end of the first valve (A1) of the flue and the other end of the ninth valve (A9) of the flue are connected with a hot air inlet of a kiln head waste heat boiler (E4);
the hot air outlet of the kiln head waste heat boiler (E4) is divided into two paths: a first branch of a hot air outlet of the kiln head waste heat boiler and a second branch of the hot air outlet of the kiln head waste heat boiler; the second branch of the hot air outlet of the kiln head waste heat boiler is connected with the inlet of an induced draft fan (E8) through the other end of a seventh valve (A7) of the flue;
a water feeding inlet of the kiln head waste heat boiler (E4) is connected with a boiler water feeding pipe; the steam outlet of the kiln head waste heat boiler (E4) is connected with the first steam inlet of the steam-splitting cylinder (E3); the steam outlet of the steam dividing cylinder (E3) is connected with the steam inlet of the steam turbine (E2).
5. The waste heat power generation system of claim 4, wherein the first branch of the hot air outlet of the kiln head waste heat boiler is sequentially connected with a dust remover (E9), an induced draft fan (E10) and a chimney (E11).
6. The cogeneration system of claim 4, further comprising: a kiln tail waste heat boiler (E12);
the outlet end of the kiln tail hot air pipe is connected with a hot air inlet of a kiln tail waste heat boiler (E12); the outlet of the boiler water supply pipe is connected with the water inlet of the kiln tail waste heat boiler (E12), and the steam outlet of the kiln tail waste heat boiler (E12) is divided into two paths: a first branch of a steam outlet of the kiln tail waste heat boiler and a second branch of the steam outlet of the kiln tail waste heat boiler; the first branch of the steam outlet of the kiln tail waste heat boiler is connected with one end of a second valve (S2) of the steam pipeline; a second branch of a steam outlet of the kiln tail waste heat boiler is connected with one end of a first valve (S1) of a steam pipeline;
the other end of the second valve (S2) of the steam pipeline is connected with one end of a third valve (S3) of the steam pipeline through a gas-steam heat exchange channel of the steam heating device (E5), and the other end of the third valve (S3) and the other end of the first valve (S1) of the steam pipeline are connected with a second steam inlet of the steam-splitting cylinder (E3).
7. A cogeneration method, wherein the cogeneration system of claim 6 comprises:
closing a second flue valve (A2), a seventh flue valve (A7) and a ninth flue valve (A9); opening a first flue valve (A1); closing the second valve (S2) of the steam pipeline, closing the third valve (S3) of the steam pipeline and opening the first valve (S1) of the steam pipeline;
the kiln head hot air enters a kiln head waste heat boiler (E4) through a first flue valve (A1), and is discharged to the atmosphere from the kiln head waste heat boiler (E4) after heat exchange; boiler feed water is heated by a kiln head waste heat boiler (E4) to generate steam to a steam distributing cylinder (E3);
the kiln tail hot flue gas enters a kiln tail waste heat boiler (E12), and is discharged from the kiln tail waste heat boiler (E12) after heat exchange; boiler feed water is heated by a kiln tail waste heat boiler (E12) to be steam and enters a steam distributing cylinder (E3);
the mixed steam enters a steam turbine (E2) from the steam dividing cylinder (E3) to drive a generator to generate electricity.
8. A cogeneration method, wherein the cogeneration system of claim 6 comprises:
closing a fifth flue valve (A5), a sixth flue valve (A6), a seventh flue valve (A7) and a tenth flue valve (A10); opening a first flue valve (A1), a second flue valve (A2), a third flue valve (A3), a fourth flue valve (A4), an eighth flue valve (A8), a ninth flue valve (A9) and an eleventh flue valve (A11); closing the second valve (S2) of the steam pipeline, closing the third valve (S3) of the steam pipeline and opening the first valve (S1) of the steam pipeline;
the kiln head hot air enters a heat storage body (E7) for heat storage and then enters a waste heat boiler (E4); boiler feed water is heated by a kiln head waste heat boiler (E4) to generate steam to a steam distributing cylinder (E3);
the kiln tail hot flue gas enters a kiln tail waste heat boiler (E12), and is discharged from the kiln tail waste heat boiler (E12) after heat exchange; boiler feed water is heated by a kiln tail waste heat boiler (E12) to be steam and enters a steam distributing cylinder (E3);
the mixed steam enters a steam turbine (E2) from the steam dividing cylinder (E3) to drive a generator to generate electricity.
9. A cogeneration method, wherein the cogeneration system of claim 6 comprises:
closing the second valve (A2), the third flue valve (A3), the eighth flue valve (A8) and the eleventh flue valve (A11); opening a first flue valve (A1), a fourth flue valve (A4), a fifth flue valve (A5), a sixth flue valve (A6), a seventh flue valve (A7), a ninth flue valve (A9) and a tenth flue valve (A10); opening a second valve (S2) of the steam pipeline, opening a third valve (S3) of the steam pipeline, and closing a first valve (S1) of the steam pipeline;
an induced draft fan (E8) sends waste gas exhausted by a kiln head waste heat boiler (E4) into a heat storage body (E7) for heat extraction, hot air after heat extraction enters a steam heating device (E5), steam sent by the kiln tail waste heat boiler is reheated, the hot air after heat extraction is mixed with hot air at the kiln head of an original flue, and the mixed hot air enters the waste heat boiler (E4); boiler feed water is heated by a kiln head waste heat boiler (E4) to generate steam to a steam distributing cylinder (E3);
the kiln tail hot flue gas enters a kiln tail waste heat boiler (E12), and is discharged from the kiln tail waste heat boiler (E12) after heat exchange; boiler feed water is heated by a kiln tail waste heat boiler (E12) to form steam, the steam enters a steam heating device (E5) for further heat exchange, and then enters a steam distributing cylinder (E3);
the mixed steam enters a steam turbine (E2) from the steam dividing cylinder (E3) to drive a generator to generate electricity.
CN202210067017.3A 2022-01-20 2022-01-20 Heat storage peak regulation device, waste heat power generation system and method Active CN114413637B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210067017.3A CN114413637B (en) 2022-01-20 2022-01-20 Heat storage peak regulation device, waste heat power generation system and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210067017.3A CN114413637B (en) 2022-01-20 2022-01-20 Heat storage peak regulation device, waste heat power generation system and method

Publications (2)

Publication Number Publication Date
CN114413637A true CN114413637A (en) 2022-04-29
CN114413637B CN114413637B (en) 2024-04-30

Family

ID=81276118

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210067017.3A Active CN114413637B (en) 2022-01-20 2022-01-20 Heat storage peak regulation device, waste heat power generation system and method

Country Status (1)

Country Link
CN (1) CN114413637B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113390075A (en) * 2020-03-11 2021-09-14 赫普能源环境科技股份有限公司 Thermal power plant solid heat storage power generation peak regulation and frequency modulation system and working method
CN214250594U (en) * 2020-12-25 2021-09-21 介休思安节能技术有限公司 Flue gas heat storage system
CN113685240A (en) * 2021-09-29 2021-11-23 北京思安综合能源发展有限公司 Waste heat and complementary energy power station with heat storage and peak regulation functions, control, design and transformation method
CN215057623U (en) * 2021-07-13 2021-12-07 华电国际电力股份有限公司天津开发区分公司 Flexible power generation and heat supply system of thermal power generating unit
CN113847109A (en) * 2021-09-26 2021-12-28 西安热工研究院有限公司 Electric heating comprehensive energy storage peak regulation system of coal electric unit and working method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113390075A (en) * 2020-03-11 2021-09-14 赫普能源环境科技股份有限公司 Thermal power plant solid heat storage power generation peak regulation and frequency modulation system and working method
CN214250594U (en) * 2020-12-25 2021-09-21 介休思安节能技术有限公司 Flue gas heat storage system
CN215057623U (en) * 2021-07-13 2021-12-07 华电国际电力股份有限公司天津开发区分公司 Flexible power generation and heat supply system of thermal power generating unit
CN113847109A (en) * 2021-09-26 2021-12-28 西安热工研究院有限公司 Electric heating comprehensive energy storage peak regulation system of coal electric unit and working method
CN113685240A (en) * 2021-09-29 2021-11-23 北京思安综合能源发展有限公司 Waste heat and complementary energy power station with heat storage and peak regulation functions, control, design and transformation method

Also Published As

Publication number Publication date
CN114413637B (en) 2024-04-30

Similar Documents

Publication Publication Date Title
CN112855293B (en) Integrated heat storage industrial steam supply cogeneration peak shaving frequency modulation system and operation method
CN102012167B (en) System and method for power generating by jointly recovering waste heat of flue gas of sintering machine and exhaust gas of cooling machine
CN110145376B (en) Boiler and steam turbine decoupling system based on increase steam turbine
CN113202574B (en) Peak-shaving power generation system and method by coupling compressed air energy storage
CN105804872A (en) Steam reinjection type gas turbine power generation method and device based on solar energy and waste heat recovery
CN112611010B (en) Adjusting method of flexible adjusting system for power generation load of multi-heat-source cogeneration unit
CN210714852U (en) IGCC system with adjustable thermoelectric proportion
CN101520234B (en) Heat pump type combined heat and power system by taking solid oxide fuel battery as power generating unit
CN208687705U (en) A kind of system that excision low pressure (LP) cylinder is coupled into automotive row with low-pressure coal saver
CN101285627A (en) Composite energy supply system and its hidden heat utilization method
CN114413637B (en) Heat storage peak regulation device, waste heat power generation system and method
CN219318398U (en) Deep utilization system for cold end waste heat of power plant based on high back pressure exhaust steam of steam turbine
CN113790435B (en) Coal-fired unit and SOFC (solid oxide Fuel cell) coupled power generation system and operation method thereof
CN112879161B (en) Temperature control heating type solar and gas combined cycle power generation system and method thereof
CN212390345U (en) High-efficient compression heat pump energy storage peak shaving system of thermal power plant coupling
CN103925808A (en) Smoke waste heat efficient recycling system and method of sintering machine
CN205482289U (en) Raw coal steam drying system of power plant suitable for operate in a variable working condition
CN210088820U (en) Combined cycle power peak regulation system based on steam extraction coupling heat storage
CN212132387U (en) Two-stage steam extraction type medium-temperature and medium-pressure waste incineration power generation system
CN215490405U (en) Solar energy-gas combined cycle power generation system
CN214537436U (en) Cement kiln waste heat power generation system capable of improving efficiency by utilizing temperature-adjusting wind
CN219283306U (en) Ignition exhaust steam recycling system for start-stop process of boiler
CN217235542U (en) Flue gas circulation waste heat power generation system
CN112049700B (en) Comprehensive energy system utilizing cogeneration of high-parameter heat supply steam complementary energy and control method thereof
CN220955743U (en) High back pressure transformation and low pressure cylinder zero output coupling combined heat and power generation unit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant