CN218884694U - Sintering discharges low temperature waste gas complementary energy recycle system - Google Patents
Sintering discharges low temperature waste gas complementary energy recycle system Download PDFInfo
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- CN218884694U CN218884694U CN202223165450.5U CN202223165450U CN218884694U CN 218884694 U CN218884694 U CN 218884694U CN 202223165450 U CN202223165450 U CN 202223165450U CN 218884694 U CN218884694 U CN 218884694U
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- 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
Abstract
The utility model discloses a system for recycling waste gas residual energy discharged by sintering, which comprises a circular cooler and a gas-collecting smoke hood arranged above the circular cooler, wherein a smoke discharge pipeline is arranged on the gas-collecting smoke hood, the output end of the smoke discharge pipeline is connected with the air inlet of a smoke heat exchanger, the air outlet of the smoke heat exchanger is connected with a draught fan through a first low-temperature smoke pipeline, and the draught fan is also connected with a chimney; the gas outlet of the flue gas heat exchanger is also connected with a working medium evaporator through a second low-temperature flue gas pipeline, and the working medium evaporator is also connected with an organic working medium circulating unit; the high-temperature flue gas discharged from the flue gas heat exchanger can enter the working medium evaporator and exchange heat with the organic working medium fed into the working medium evaporator through the organic working medium circulating unit. The utility model discloses a to the make full use of the latent heat of the low temperature waste gas that sintering high temperature waste gas produced behind the gas heater heat transfer, improved the latent heat recovery volume of sintering system, finally reduced the comprehensive energy resource consumption of sintering process unit.
Description
Technical Field
The utility model relates to a sintering system latent heat recovery technical field, concretely relates to sintering discharges low temperature waste gas complementary energy recycle system.
Background
China is a big iron and steel country, the energy consumption of blast furnace ironmaking is large, especially in a long-flow blast furnace ironmaking system, the energy consumption of a sintering production process accounts for about 15% of the total energy consumption of an enterprise, the latent heat resource of the sintering process accounts for about 33% of the ironmaking proportion of the blast furnace, therefore, the sintering waste heat is the main part of waste heat recovery of the existing sintering process, if the comprehensive efficiency of the latent heat recovery system can be fully improved, a large amount of energy can be saved for the society and the enterprise, and simultaneously, CO can be reduced 2 Emissions and thermal pollution.
At present, common sintering latent heat recovery system carries out the heat exchange with the condensate with the high temperature waste gas that produces in the sintering production process, the condensate converts the vapor that has certain pressure and temperature into through the heat exchange, then utilize, the waste gas that produces behind the heat exchange, direct external emission after pressurizing through the draught fan, accomplish the recovery process of sintering latent heat, when the exhaust gas temperature behind the heat transfer can't satisfy the safe operating temperature of draught fan, still need supply a certain amount of cold air at the front end of draught fan and reduce exhaust gas temperature, in order to guarantee latent heat recovery system's safe and stable operation, its defect lies in: latent heat of low-temperature waste gas generated after heat exchange with condensed water cannot be effectively recycled, and when cold air is supplemented to reduce the temperature of the waste gas, the energy consumption of the whole sintering waste heat recovery system is increased due to the increase of the energy consumption of the induced draft fan, so that energy conservation and emission reduction are not facilitated. In view of the foregoing, it is desirable to develop a system that can make full use of the latent heat of sintering.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims to provide a sintering discharges low temperature waste gas complementary energy recycle system to solve the problem that latent heat recovery efficiency of low temperature waste gas is low among the prior art, increase sintering latent heat recovery system's latent heat recovery volume.
In order to achieve the purpose, the utility model adopts the following technical proposal:
a sintering emission low-temperature waste gas complementary energy recycling system comprises a ring cooling machine and a gas collection smoke hood arranged above the ring cooling machine, wherein a smoke discharge pipeline is arranged on the gas collection smoke hood, the output end of the smoke discharge pipeline is connected with the air inlet of a smoke heat exchanger, the air outlet of the smoke heat exchanger is connected with an induced draft fan through a first low-temperature smoke pipeline, and the induced draft fan is also connected with a chimney;
the gas outlet of the flue gas heat exchanger is also connected with a working medium evaporator through a second low-temperature flue gas pipeline, and the working medium evaporator is also connected with an organic working medium circulating unit; the high-temperature flue gas discharged from the flue gas heat exchanger can enter the working medium evaporator and exchange heat with the organic working medium fed into the working medium evaporator through the organic working medium circulating unit.
The utility model discloses still have following technical characteristic:
specifically, the organic working medium circulation unit comprises a working medium expander, a working medium condenser and a working medium pump which are sequentially connected, wherein a working medium inlet of the working medium expander is connected with a working medium outlet of the working medium evaporator, a working medium outlet of the working medium expander is connected with a working medium inlet of the working medium condenser, and the working medium outlet of the working medium condenser is communicated with the working medium inlet of the working medium evaporator through the working medium pump.
Furthermore, the first low-temperature flue gas pipeline is provided with a communication valve and a cold air conveying opening in sequence from being close to the gas outlet of the flue gas heat exchanger to being far away from the gas outlet of the flue gas heat exchanger, the cold air conveying opening is connected with a cold air pipeline, and the cold air pipeline is provided with a cold air valve.
Furthermore, a second communicating valve is further arranged on the second low-temperature flue gas pipeline close to the working medium inlet of the working medium evaporator.
Furthermore, a turbine generator set is connected to the flue gas heat exchanger, a steam inlet of the turbine generator set is connected with a high-pressure steam outlet of the flue gas heat exchanger, and an exhaust outlet of the turbine generator set is connected with a water supply inlet of the flue gas heat exchanger.
Furthermore, a water inlet of the working medium condenser is connected with a water outlet of the condensing tower, and a water outlet of the working medium condenser is connected with a water inlet of the condensing tower.
Furthermore, an asynchronous generator is connected to the working medium expansion machine.
Compared with the prior art, the utility model, profitable technological effect is:
(1) The utility model discloses a setting up two flue gas pipelines and the setting of the part that corresponding flue gas pipeline links can be when working medium evaporimeter or organic working medium circulation unit break down, switch over the emission that realizes low temperature waste gas through the pipeline, when working medium evaporimeter and organic working medium circulation unit all are in the heat and are equipped with the state, realize the make full use of to low temperature waste gas latent heat, improved the latent heat recovery volume of sintering system, finally reduced the comprehensive energy resource consumption of sintering process unit, and can be in the system moreover.
(2) The utility model discloses a working medium expander, applied closed circulation, send into working medium expander doing work after the organic working medium pressurization after with the heat transfer vaporization, and asynchronous generator and working medium expander directly ally oneself with, the expander doing work is direct to be used on the generator, reduces middle conversion loss.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Description of the drawings: 1-a circular cooler, 2-a gas collecting hood, 3-a flue gas discharge pipeline, 4-a flue gas heat exchanger, 5-a first low-temperature flue gas pipeline, 6-an induced draft fan, 7-a chimney, 8-a second low-temperature flue gas pipeline, 9-a working medium evaporator, 10-an organic working medium circulation unit, 11-a first communicating valve, 12-a cold air conveying port, 13-a cold air pipeline, 14-a second communicating valve, 15-a turbo generator set, 16-a condensing tower, 17-an asynchronous generator and 18-a cooler; 101-working medium expander, 102-working medium condenser and 103-working medium pump; 131-cold wind valve.
The present invention will be described in detail with reference to the drawings and the following detailed description.
Detailed Description
The following embodiments of the present invention are provided, and it should be noted that the present invention is not limited to the following embodiments, and all the equivalent transformations made on the basis of the technical solution of the present application all fall into the protection scope of the present invention.
The terms "upper", "lower", "front", "rear", "top", "bottom", and the like as used herein are used merely for convenience in describing the invention and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, "inner" and "outer" refer to the inner and outer of the corresponding component profiles, and the above terms should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or imply that the number of technical features indicated is significant. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.
In the present invention, the terms "mounting", "connecting", "fixing" and the like are used in a broad sense unless otherwise stated, and may be, for example, fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example (b):
according to the technical scheme, as shown in fig. 1, the present embodiment provides a system for recycling waste energy of low-temperature exhaust gas discharged by sintering, which includes a ring cooling machine 1 and gas collecting hoods 2 disposed above the ring cooling machine 1, wherein the number of the gas collecting hoods 2 is 2 in the present embodiment, two gas collecting hoods 2 are respectively provided with a flue gas discharge pipeline 3, and output ends of the two flue gas discharge pipelines 3 are connected with an air inlet of a flue gas heat exchanger 4, an air outlet of the flue gas heat exchanger 4 is connected with an induced draft fan 6 through a first low-temperature flue gas pipeline 5, the induced draft fan 6 is further connected with a chimney 7, an air outlet of the flue gas heat exchanger 4 is further connected with a working medium evaporator 9 through a second low-temperature flue gas pipeline 8, and the working medium evaporator 9 is further connected with an organic working medium circulation unit 10;
the high-temperature flue gas discharged from the flue gas heat exchanger 4 can enter the working medium evaporator 9 and exchange heat with the organic working medium fed into the working medium evaporator 9 through the organic working medium circulating unit 10.
As a preferred scheme of this embodiment, the organic working medium circulation unit 10 includes a working medium expander 101, a working medium condenser 102 and a working medium pump 103, which are sequentially connected, a working medium inlet of the working medium expander 101 is connected to a working medium outlet of the working medium evaporator 9, a working medium outlet of the working medium expander 101 is connected to a working medium inlet of the working medium condenser 102, and a working medium outlet of the working medium condenser 102 is communicated with a working medium inlet of the working medium evaporator 9 via the working medium pump 103.
The working medium condenser 102 is used for circularly cooling the organic working medium discharged after being processed by the working medium expander 101, so that the organic working medium is changed from a gas state to a liquid state, the working medium pump 103 is used for conveying the liquid organic working medium discharged from the working medium condenser 102 to the working medium evaporator 9, and all main devices in the organic working medium circulating unit 10 are connected in series to form an independent and complete closed circulating system.
As an optimal scheme of this embodiment, the first low-temperature flue gas duct 5 is sequentially provided with a first communicating valve 11 and a cold air conveying port 12 from being close to the air outlet of the flue gas heat exchanger 4 to being far away from the air outlet of the flue gas heat exchanger 4, the cold air conveying port 12 is connected with a cold air duct 13, the cold air duct 13 is provided with a cold air valve 131, and cold air can be introduced through the cold air valve 131 to reduce the temperature of the exhaust gas.
As a preferable scheme of this embodiment, a second communicating valve 14 is further disposed on the second low-temperature flue gas pipe 8 near the working medium inlet of the working medium evaporator 9. The flow passage of the low-temperature exhaust gas is controlled by switching the opening and closing of the first communication valve 11 and the second communication valve 14.
As a preferred scheme of this embodiment, the flue gas heat exchanger 4 is further connected with a turbine generator set 15 for performing work and power generation by using steam generated by sintering high-temperature exhaust gas through the heat exchanger, a steam inlet of the turbine generator set 15 is connected with a high-pressure steam outlet of the flue gas heat exchanger 4, an exhaust outlet of the turbine generator set 15 is connected with a water supply inlet of the flue gas heat exchanger 4 through a cooler 18, and gas discharged from an exhaust outlet of the turbine generator set 15 is cooled into water by the cooler 18 and then returns to the flue gas heat exchanger 4 for heat exchange.
As a preferable scheme of this embodiment, a water inlet of working medium condenser 102 is connected to a water outlet of condensing tower 16, and a water outlet of working medium condenser 102 is connected to a water inlet of condensing tower 16.
As a preferable scheme of this embodiment, the working medium expander 101 is further connected with an asynchronous generator 17.
The working process of the embodiment is as follows:
after the sintering process finishes normal production, in the operation process of the utility model,
when the working medium evaporator 9 and the organic working medium circulation unit 10 are both in a hot standby state:
firstly, the cold air valve 131 and the first communicating valve 11 are closed, and the second communicating valve 14 is opened; under the action of rotation of an induced draft fan 6, high-temperature waste gas generated by sintering generates low-temperature waste gas after heat exchange through a flue gas heat exchanger 4, then the low-temperature waste gas enters a working medium evaporator 9 through a second low-temperature flue gas pipeline 8 for heat exchange, the temperature of the waste gas after heat exchange reaches the safe operation condition of the induced draft fan 6, the waste gas is pressurized and then sent to a chimney 7 for emission, and thus the recovery of sensible heat of the low-temperature flue gas is completed; the working medium is pressurized by the working medium pump 103 and then enters the working medium evaporator 9 to flow in opposite directions with the low-temperature waste gas entering the working medium evaporator 9, then enters the working medium expander 101 to expand after heat exchange is completed in the working medium evaporator 9, the working medium expander 101 is driven to drive the asynchronous generator 17 to rotate for power generation, the working medium after expansion is processed is condensed and phase-changed by the working medium condenser 102, and then is pressurized by the working medium pump 6 and sent to the working medium evaporator 9, so that the utilization of the sensible heat of the low-temperature flue gas is completed.
When the working medium evaporator 9 and the organic working medium circulation unit 10 are in an abnormal operation state:
firstly, closing the second communication valve 14, and opening the first communication valve 11 and the cold air valve 131; under the rotary work of the draught fan 6, the high-temperature waste gas generated by sintering generates low-temperature waste gas after heat exchange through the flue gas heat exchanger 4, then the low-temperature waste gas is mixed with cold air entering through the cold air valve 131 in the first low-temperature flue gas pipeline 5, the temperature of the mixed waste gas reaches the safe operation condition of the draught fan 6, and the mixed waste gas is pressurized and then sent to the chimney 7 to be discharged, so that low-temperature flue gas emission is completed.
The above description is provided for the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and the technical idea of the present invention can be implemented by various simple modifications, which all belong to the protection scope of the present invention.
In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.
It should be noted that all the components referred to in the present embodiment are components that can be obtained by purchase in the prior art, except for those specifically described.
Claims (7)
1. A system for recycling waste gas complementary energy discharged by sintering at low temperature comprises a ring cooling machine (1) and a gas-collecting smoke hood (2) arranged above the ring cooling machine (1), wherein a smoke discharge pipeline (3) is arranged on the gas-collecting smoke hood (2), the output end of the smoke discharge pipeline (3) is connected with the air inlet of a smoke heat exchanger (4),
the gas outlet of the flue gas heat exchanger (4) is connected with an induced draft fan (6) through a first low-temperature flue gas pipeline (5), the induced draft fan (6) is also connected with a chimney (7), the gas outlet of the flue gas heat exchanger (4) is also connected with a working medium evaporator (9) through a second low-temperature flue gas pipeline (8), and the working medium evaporator (9) is also connected with an organic working medium circulating unit (10);
the low-temperature flue gas discharged from the flue gas heat exchanger (4) can enter the working medium evaporator (9) and exchange heat with the organic working medium fed into the working medium evaporator (9) through the organic working medium circulating unit (10).
2. The system for recycling the complementary energy of the sintering emission low-temperature waste gas as recited in claim 1, wherein the organic working medium circulation unit (10) comprises a working medium expander (101), a working medium condenser (102) and a working medium pump (103) which are sequentially connected, a working medium inlet of the working medium expander (101) is connected with a working medium outlet of the working medium evaporator (9), a working medium outlet of the working medium expander (101) is connected with a working medium inlet of the working medium condenser (102), and a working medium outlet of the working medium condenser (102) is communicated with the working medium inlet of the working medium evaporator (9) through the working medium pump (103).
3. The system for recycling the waste energy of the sintering emission low-temperature waste gas as claimed in claim 1, wherein the first low-temperature flue gas pipeline (5) is sequentially provided with a communication valve (11) and a cold air conveying opening (12) from a position close to the gas outlet of the flue gas heat exchanger (4) to a position far away from the gas outlet of the flue gas heat exchanger (4), the cold air conveying opening (12) is connected with a cold air pipeline (13), and the cold air pipeline (13) is provided with a cold air valve (131).
4. The system for recycling the complementary energy of the sintering emission low-temperature waste gas as claimed in claim 1, wherein a second communication valve (14) is further arranged on the second low-temperature flue gas pipeline (8) close to the working medium inlet of the working medium evaporator (9).
5. The system for recycling the complementary energy of the sintering exhaust low-temperature waste gas as claimed in claim 1, wherein a turbine generator set (15) is further connected to the flue gas heat exchanger (4), a steam inlet of the turbine generator set (15) is connected with a high-pressure steam outlet of the flue gas heat exchanger (4), and an exhaust outlet of the turbine generator set (15) is connected with a water supply inlet of the flue gas heat exchanger (4) through a cooler.
6. The system for recycling the complementary energy of the sintering emission low-temperature waste gas as claimed in claim 2, wherein a water inlet of the working medium condenser (102) is connected with a water outlet of the condensing tower (16), and a water outlet of the working medium condenser (102) is connected with a water inlet of the condensing tower (16).
7. The system for recycling the complementary energy of the sintering emission low-temperature waste gas as claimed in claim 2, wherein an asynchronous generator (17) is further connected to the working medium expander (101).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223165450.5U CN218884694U (en) | 2022-11-28 | 2022-11-28 | Sintering discharges low temperature waste gas complementary energy recycle system |
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| CN202223165450.5U CN218884694U (en) | 2022-11-28 | 2022-11-28 | Sintering discharges low temperature waste gas complementary energy recycle system |
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| CN218884694U true CN218884694U (en) | 2023-04-18 |
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