CN218443370U - Sintering machine flue gas waste heat degree of depth utilizes power generation system - Google Patents
Sintering machine flue gas waste heat degree of depth utilizes power generation system Download PDFInfo
- Publication number
- CN218443370U CN218443370U CN202123013866.0U CN202123013866U CN218443370U CN 218443370 U CN218443370 U CN 218443370U CN 202123013866 U CN202123013866 U CN 202123013866U CN 218443370 U CN218443370 U CN 218443370U
- Authority
- CN
- China
- Prior art keywords
- flue gas
- working medium
- sintering machine
- heat
- subsystem
- 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.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a sintering machine flue gas waste heat deep utilization power generation system, which relates to the technical field of sintering machine flue gas waste heat utilization, and adopts the flue gas waste heat of the sintering machine as a heat source, uses a flue gas heat exchanger to transmit heat to circulating water, further transmits the heat to working media, utilizes the working media to do work, and realizes the conversion of flue gas heat energy into electric energy; and the power system is used for providing power to realize the circulation of the process, so that the power can be continuously and efficiently generated. The utility model discloses greatly improved the energy utilization rate of sintering machine flue gas, reduced the flue gas temperature simultaneously, can reduce the fan power consumption, the utility model discloses a system device is efficient, equipment is corrosion-resistant, safety and stability, long service life, has guaranteed that flue gas waste heat degree of depth utilization continuously goes on.
Description
Technical Field
The utility model relates to a sintering machine flue gas waste heat utilization technology field, more specifically the saying so relates to a sintering machine flue gas waste heat degree of depth utilization power generation system.
Background
The steel sintering is a processing procedure for providing 'fine materials' for blast furnace smelting, and the sintered ore has the characteristics of stable chemical components, uniform particle size, good reducibility and high metallurgical performance, and is beneficial to realizing energy conservation, consumption reduction, safe and efficient operation of the blast furnace. The flue gas of the existing sintering machine has high dust content, high temperature (more than 170 ℃ in terms of items) and high corrosive gas content, so the direct utilization of the waste heat of the high-temperature flue gas is difficult. For the sintering project adopting the activated coke for desulfurization and denitrification, the over-high temperature of the flue gas can generate negative influence on the desulfurization and denitrification, and in order to reduce the temperature of the flue gas, part of factories mix cold air into the high-temperature flue gas so as to reduce the temperature of the flue gas, the total amount of the flue gas can be increased by a wind mixing method, and the operation cost is increased. The flue gas temperature is reasonably reduced and heat is recycled, so that the safe operation of the subsequent process can be ensured, certain economic benefit can be generated, and the effect of achieving two purposes at a time. At present, with the tightening of the national policy of energy conservation and emission reduction of the steel industry, a set of system needs to be designed to reasonably utilize sintering tail flue gas in response to the strategic targets of national carbon peak reaching and carbon neutralization. However, the flue gas dust of the sintering machine is high and the corrosivity is large, the temperature of the flue gas is usually 120-180 ℃, the heat quality is low compared with that of power generation steam, if the waste heat boiler is used for recovering the heat and then driving a steam turbine to generate power, the situations of low-temperature corrosion, blockage and the like of a heating surface are encountered, and at present, no mature case exists. Partial projects try to utilize a flue heat exchanger to recover flue gas waste heat, transfer heat to water and supply heat for peripheral users, however, the heating scheme is greatly influenced by seasonality and regionality, and has certain limitation.
Therefore, how to fully utilize the tail gas of the sintering machine to generate electricity and ensure the safety and stability of the system, high efficiency and long service life is a problem that needs to be solved urgently by technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a sintering machine flue gas waste heat degree of depth utilizes power generation system.
In order to realize the purpose, the utility model adopts the following technical scheme:
the flue gas subsystem is connected with the heat taking subsystem, and the heat taking subsystem, the power applying and generating subsystem and the working medium condensing subsystem are connected in pairs.
Optionally, the heat extraction subsystem comprises a flue gas heat exchanger and a working medium evaporator which are communicated in two directions.
Optionally, the flue gas heat exchanger is preferably a fluoroplastic flue gas heat exchanger.
Optionally, the fluoroplastic flue gas heat exchanger is provided with an online high-pressure water washing device and a bottom ash discharge hopper. The fluoroplastic material is low in friction coefficient and not prone to being stained with dust, and an online flushing system is designed in the heat exchanger, so that dust can be prevented from blocking the heat exchanger.
Optionally, the flue gas subsystem comprises a dust remover, an induced draft fan, a desulfurization and denitrification reactor and a chimney; the dust remover is used for receiving high-temperature sintering flue gas from a sintering machine, the dust remover is connected with an induced draft fan, the induced draft fan is connected with a flue gas heat exchanger, and the flue gas heat exchanger, a desulfurization and denitrification reactor and a chimney are sequentially connected.
Optionally, the work power generation subsystem includes a screw expander, a speed reducer, and a generator that are connected in sequence, and the screw expander is connected with the working medium evaporator.
Optionally, the working medium condensing subsystem includes a working medium condenser and a mechanical cooling tower which are communicated in two directions, and the working medium condenser is respectively connected with the screw expander and the working medium evaporator.
Optionally, the system further comprises a power subsystem for providing power conditions for the circulation of working medium or water between the devices.
Optionally, the power subsystem comprises a demineralized water booster pump arranged between the working medium evaporator and the flue gas heat exchanger, a first working medium circulating pump arranged between the mechanical cooling tower and the working medium condenser, and a second working medium circulating pump arranged between the working medium condenser and the working medium evaporator.
Optionally, the flue gas heat exchanger is a fluoroplastic flue gas heat exchanger.
Optionally, the fluoroplastics gas heat exchanger is provided with an online high-pressure water washing device and a bottom ash discharge hopper.
According to the above technical scheme, the utility model provides a sintering machine flue gas waste heat degree of depth utilizes power generation system compares with prior art, has following beneficial effect:
(1) The utility model discloses a sintering machine flue gas waste heat is as the heat source, first-selected flue gas heat exchanger that utilizes transmits the heat to the circulating water, and then transmits the heat to the working medium of doing work, carries out the work through the power generation subsystem of doing work, finally realizes flue gas heat energy conversion and improves energy utilization. By arranging the flue gas heat exchanger, the flue gas can be cooled without doping cold air, the temperature of the flue gas can be reduced to a reasonable range, the subsequent desulfurization and denitrification process can be protected, and the failure of active coke can be prevented; the volume flow of the flue gas under the working condition can be reduced by reducing the temperature of the flue gas, the resistance on the side of the flue gas and the air is reduced, and the reduction of the power consumption of the fan is facilitated.
(2) The utility model discloses a flue gas heat exchanger adopts fluorine plastic material heat exchanger, utilizes water and high temperature flue gas to carry out the dividing wall type heat transfer, and this heat exchanger core heat transfer component is fluorine plastic heat exchange tube, and the fluorine plastic material can effectively avoid corrosive gas in the flue gas to produce the destruction to the heat exchanger. The fluoroplastic flue gas heat exchanger exchanges heat in a flue gas dividing wall type, and utilizes circulating water as an intermediate medium to transfer flue gas heat to a water side.
(3) The utility model discloses set up working medium condensation subsystem to condensation circulation work working medium realizes the utility model discloses the system lasts the electricity generation of doing work steadily.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the system structure of the present invention;
the system comprises a high-temperature sintering flue gas 1, a dust remover 2, a draught fan 3, a flue gas heat exchanger 4, a desulfurization and denitrification reactor 5, a chimney 6, low-temperature circulating water 7, a demineralized water booster pump 8, high-temperature circulating water 9, a working medium evaporator 10, high-temperature working medium steam 11, low-temperature working medium 12, a second working medium circulating pump 13, a working medium condenser 14, working medium exhaust steam 15, a screw expander 16, a speed reducer 17, a generator 18, high-temperature cooling water 19, low-temperature cooling water 20, a first working medium circulating pump 21 and a mechanical cooling tower 22.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The embodiment of the utility model discloses sintering machine flue gas waste heat degree of depth utilizes power generation system, see figure 1, include the flue gas subsystem, get hot subsystem, do work power generation subsystem, working medium condensation subsystem, the flue gas subsystem with get hot subsystem and be connected, get two liang of connections between hot subsystem, do work power generation subsystem, the working medium condensation subsystem.
The heat taking subsystem comprises a flue gas heat exchanger 4 and a working medium evaporator 10 which are communicated in two directions.
The flue gas heat exchanger 4 is preferably a fluoroplastic flue gas heat exchanger and is arranged on a tail flue of the sintering machine. The heat exchange element is made of fluoroplastic, is corrosion-resistant and anti-scaling, recovers heat for power generation to make up for a power utilization gap in a plant, can run all the year round, is not influenced by time and regions, and has good economical efficiency.
In one embodiment, the fluoroplastic flue gas heat exchanger is provided with an online high-pressure water washing device and a bottom ash discharge hopper. The fluoroplastic material has a low friction coefficient, is not easy to be stained with dust, and a set of online flushing system is designed in the heat exchanger to prevent dust from blocking the heat exchanger.
The flue gas subsystem comprises a dust remover 2, an induced draft fan 3, a desulfurization and denitrification reactor 5 and a chimney 6; the dust remover 2 is used for receiving high-temperature sintering flue gas 1 from a sintering machine, the dust remover 2 is connected with an induced draft fan 3, the induced draft fan 3 is connected with a flue gas heat exchanger 4, and the flue gas heat exchanger 4, a desulfurization and denitrification reactor 5 and a chimney 6 are connected in sequence.
The working power generation subsystem comprises a screw expander 16, a speed reducer 17 and a generator 18 which are connected in sequence, and the screw expander 16 is connected with the working medium evaporator 10.
The working medium condensation subsystem comprises a working medium condenser 14 and a mechanical cooling tower 22 which are communicated in a two-way mode, and the working medium condenser 14 is connected with the screw expander 16 and the working medium evaporator 10 respectively.
The system also comprises a power subsystem which is used for providing power conditions for the circulation of working media or water among the devices.
In the specific embodiment, the power subsystem comprises a demineralized water booster pump 8 arranged between the working medium evaporator 10 and the flue gas heat exchanger 4, a first working medium circulating pump 21 arranged between the mechanical cooling tower 22 and the working medium condenser 14, and a second working medium circulating pump 13 arranged between the working medium condenser 14 and the working medium evaporator 10.
Adopt the utility model discloses the technological process who does work the electricity generation summarizes to be:
receiving high-temperature sintering flue gas 1 from a sintering machine, enabling the high-temperature sintering flue gas 1 to enter a flue gas heat exchanger 4 through a dust remover 2 and an induced draft fan 3, enabling the high-temperature sintering flue gas 1 to release heat in the flue gas heat exchanger 4, enabling the high-temperature sintering flue gas to enter a desulfurization and denitrification reactor 5 for reaction, and discharging the flue gas through a chimney 6.
In the flue gas heat exchanger 4, the low-temperature circulating water 7 exchanges heat with the high-temperature sintering flue gas 1, receives heat released from the high-temperature sintering flue gas 1, forms high-temperature circulating water 9, enters the working medium evaporator 10, releases heat in the working medium evaporator 10, and completes heat absorbing and releasing processes between the working medium evaporator 10 and the flue gas heat exchanger 4 under the driving of the power subsystem by the high-temperature circulating water 9 and the low-temperature circulating water 7.
The circulating water adopts demineralized water.
In the working medium evaporator 10, a low-temperature working medium 12 exchanges heat with the high-temperature circulating water 9 to obtain heat in the high-temperature circulating water 9, high-temperature working medium steam 11 is formed and enters a screw expander 16 to do work, and a speed reducer 17 is connected to drive a generator 18 to generate power.
Working medium steam after acting becomes working medium exhaust steam 15, exchanges heat with low-temperature cooling water 20 in a working medium condenser 14, condenses into a low-temperature working medium 12, continues to enter a working medium evaporator 9 to exchange heat with the high-temperature circulating water 9, and enters the next cycle; the low-temperature cooling water 20 absorbs heat and becomes high-temperature cooling water 19, and the high-temperature cooling water enters the mechanical cooling tower 22 for cooling and then is recycled.
The following will introduce a specific embodiment of the system device and method of the present invention for generating electricity by using waste heat of flue gas:
at 500m 2 For example, the sintering machine has the sintering tail flue gas temperature of 170 ℃ and the flue gas amount of 170 ten thousand Nm 3 And/h is calculated according to the selection.
1. Design of heat-extraction subsystem
Cooling the flue gas to about 115 ℃ by using a fluoroplastic flue gas heat exchanger, and using the recovered heat for heating desalted water;
the heated desalted water enters an evaporator to heat working media to generate steam in non-heating seasons, and a generator 18 is driven to generate power through a screw expander 16;
the fluoroplastic flue gas heat exchanger is provided with an online high-pressure water washing device and a bottom ash discharge hopper;
arrangement position: a fluoroplastic flue gas heat exchanger is additionally arranged on the sintering tail flue;
the total resistance of the flue gas side of the fluoroplastic flue gas heat exchanger is controlled within 300 Pa;
the total resistance of the water side of the fluoroplastic flue gas heat exchanger is controlled within 50 kPa;
the online flushing water of the fluoroplastic flue gas heat exchanger is supposed to be connected with industrial water.
2. Work-doing power generation subsystem design
The fluoroplastic flue gas heat exchanger outputs 112 ℃ demineralized water, the demineralized water enters the working medium evaporator 10 to exchange heat with the low-temperature working medium 12, the working medium is heated to about 90 ℃ from about 30 ℃ and vaporized, and the working medium enters the screw expander 16 to drive the generator 18 to do work and generate power. And (4) reducing the temperature of the 112 ℃ desalted water to about 92 ℃, and entering the fluoroplastic flue gas heat exchanger again to start the next circulation.
3. Condensing subsystem design
After doing work, the working medium exhaust steam is 15 ℃ or about 45 ℃, heat is diffused into air through the mechanical cooling tower 22, and the working medium is condensed into liquid and then enters the working medium evaporator 10 again to participate in the next circulation for absorbing heat and doing work.
4. System parameters, see Table 1
TABLE 1
At the above 500m 2 The sintering machine is taken as an example, adds the utility model discloses a power generation system after, the flue gas temperature is reduced to 115 ℃ by 170 ℃, calculates according to 8000 hours of operation time all the year round, can realize annual increase electricity generation amount 19200MW.h.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. The power generation system is characterized by comprising a flue gas subsystem for receiving high-temperature sintering flue gas (1) from a sintering machine, a heat taking subsystem for obtaining heat in the flue gas, a power generation subsystem for generating power and a working medium condensation subsystem for condensing circulating working media, wherein the flue gas subsystem is connected with the heat taking subsystem, and the heat taking subsystem, the power generation subsystem and the working medium condensation subsystem are connected in pairs.
2. The deep power generation system using the waste heat of the flue gas of the sintering machine according to claim 1, wherein the heat extraction subsystem comprises a flue gas heat exchanger (4) and a working medium evaporator (10) which are communicated in two directions.
3. The deep utilization power generation system by using the flue gas waste heat of the sintering machine according to claim 2, wherein the flue gas subsystem comprises a dust remover (2), an induced draft fan (3), a desulfurization and denitrification reactor (5) and a chimney (6); the dust remover (2) is used for receiving high-temperature sintering flue gas (1) from a sintering machine, the dust remover (2) is connected with an induced draft fan (3), the induced draft fan (3) is connected with a flue gas heat exchanger (4), and the flue gas heat exchanger (4), a desulfurization and denitrification reactor (5) and a chimney (6) are connected in sequence.
4. The deep utilization power generation system of the waste heat of the flue gas of the sintering machine according to claim 2, wherein the work-applying power generation subsystem comprises a screw expander (16), a speed reducer (17) and a power generator (18) which are connected in sequence, and the screw expander (16) is connected with the working medium evaporator (10).
5. The deep power generation system using the waste heat of the sintering machine flue gas as claimed in claim 4, wherein the working medium condensation subsystem comprises a working medium condenser (14) and a mechanical cooling tower (22) which are communicated in two directions, and the working medium condenser (14) is respectively connected with the screw expander (16) and the working medium evaporator (10).
6. The system for generating power by deeply utilizing the flue gas waste heat of the sintering machine according to claim 5, further comprising a power subsystem for providing power conditions for the circulation of working media or water among the devices.
7. The deep utilization power generation system for the flue gas waste heat of the sintering machine as claimed in claim 6, wherein the power subsystem comprises a demineralized water booster pump (8) arranged between the working medium evaporator (10) and the flue gas heat exchanger (4), a first working medium circulating pump (21) arranged between the mechanical cooling tower (22) and the working medium condenser (14), and a second working medium circulating pump (13) arranged between the working medium condenser (14) and the working medium evaporator (10).
8. The power generation system by utilizing the flue gas waste heat of the sintering machine deeply according to claim 2, wherein the flue gas heat exchanger (4) is a fluoroplastic flue gas heat exchanger.
9. The deep power generation system using the waste heat of the flue gas of the sintering machine according to claim 8, wherein the fluoroplastic flue gas heat exchanger is provided with an online high-pressure water washing device and a bottom ash discharge hopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123013866.0U CN218443370U (en) | 2021-12-02 | 2021-12-02 | Sintering machine flue gas waste heat degree of depth utilizes power generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123013866.0U CN218443370U (en) | 2021-12-02 | 2021-12-02 | Sintering machine flue gas waste heat degree of depth utilizes power generation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218443370U true CN218443370U (en) | 2023-02-03 |
Family
ID=85079180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123013866.0U Active CN218443370U (en) | 2021-12-02 | 2021-12-02 | Sintering machine flue gas waste heat degree of depth utilizes power generation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218443370U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001559A (en) * | 2021-12-02 | 2022-02-01 | 北京新世翼节能环保科技股份有限公司 | Sintering machine flue gas waste heat deep utilization power generation system and method |
-
2021
- 2021-12-02 CN CN202123013866.0U patent/CN218443370U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001559A (en) * | 2021-12-02 | 2022-02-01 | 北京新世翼节能环保科技股份有限公司 | Sintering machine flue gas waste heat deep utilization power generation system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102435077A (en) | Process and device for waste heat recycling and efficiency power generation of metallurgy waste heat gas | |
| CN105402761A (en) | Deep coupling utilization system for turbine steam exhaust waste heat and boiler flue gas waste heat | |
| CN218443370U (en) | Sintering machine flue gas waste heat degree of depth utilizes power generation system | |
| CN103017238A (en) | Waste heat recovery heating system of biomass power plant | |
| CN205592967U (en) | A waste heat power generation system for dangerous waste disposal trade of industry | |
| CN203010751U (en) | Heat-supply device utilizing waste heat of biomass power plant | |
| CN114001559A (en) | Sintering machine flue gas waste heat deep utilization power generation system and method | |
| CN212692569U (en) | Dry quenching air cooling condensing system | |
| CN211078487U (en) | Calcium carbide furnace cooling waste heat power generation system | |
| CN103836987A (en) | Flue gas waste heat power-generation energy-conservation and dust-removal method for electric furnace with liquid storage tank | |
| CN103383195A (en) | Waste heat utilization and dust removing method for electric furnace flue gas with thermal storage soaking device | |
| CN214950671U (en) | Sintering flue gas utilization device | |
| CN220817725U (en) | Low-grade steam heat energy utilization system | |
| CN215637204U (en) | Waste incineration flue gas waste heat utilization system | |
| CN219034828U (en) | Gas boiler flue gas waste heat cascade recycling system | |
| CN111637433A (en) | Flue gas waste heat recovery saturated steam flash evaporation power generation system | |
| CN220689111U (en) | Flue gas condensation water lifting and waste heat recovery system | |
| CN210486533U (en) | Waste heat recovery device of steel rolling heating furnace | |
| CN202145099U (en) | Flue-gas organic Rankine waste heat power generation device with thermal storage temperature equalizer for metallurgical furnace | |
| CN214370117U (en) | Flue gas waste heat utilization equipment | |
| CN210601565U (en) | Small-size gas boiler adds waste heat recovery integration system | |
| CN215295120U (en) | Heating system for recovering low-quality energy | |
| CN220871477U (en) | Steelmaking electric furnace flue gas waste heat utilization power generation system | |
| CN104748565A (en) | Electric furnace smoke waste heat power generation energy saving dust removing method | |
| CN104344731A (en) | Flue gas waste heat power generation method for electric furnace with heat storage temperature equalizer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |