CN102359400B - Comprehensive utilization system for waste heat steam of steel enterprise - Google Patents
Comprehensive utilization system for waste heat steam of steel enterprise Download PDFInfo
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- CN102359400B CN102359400B CN201110270414.2A CN201110270414A CN102359400B CN 102359400 B CN102359400 B CN 102359400B CN 201110270414 A CN201110270414 A CN 201110270414A CN 102359400 B CN102359400 B CN 102359400B
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention discloses a comprehensive utilization system for the waste heat steam of a steel enterprise, which comprises a sintering smoke desulfurizing device, a sintering machine and a sintering waste heat boiler, wherein the sintering smoke desulfurizing device, the sintering machine and the sintering waste heat boiler are successively connected, and a dry-quenching waste heat boiler matched with a coke production device is connected with a steam turbine generator unit. The comprehensive utilization system has the key point that a high-parameter steam outlet of the sintering waste heat boiler is respectively connected with the coke production device and the steam turbine generator unit, and the low-parameter steam outlet of the sintering waste heat boiler is also connected with the coke production device. In the comprehensive utilization system, the arrangement relationship of two technical systems of coking and sintering in a steel factory area is fully considered, the waste heat utilization of two production technologies is organically combined, the purpose of utilizing energy according to quality, making temperature geared to the needs of the job and utilizing by steps is realized by the policy of energy matching utilization according to respective waste heat characteristics and the parameter characteristics of the waste heat steam of the two production technologies. The situations that the waste heat steam is largely diffused, high-parameter steam is used in the mode of thermoreduction and pressure reduction and the like can be avoided, and the waste heat steam use ratio is furthest improved.
Description
Technical field
The present invention relates to flue gas heat recovery system in a kind of Production Process for Steel Enterprise.
Background technique
At present, the heat recovery rate of Iron and Steel Enterprises in China is generally not high, average approximately 30%, and advanced level also only reaches 40% left and right, reclaims potentiality very large.Aspect heat recovery mode, except part is for technique preheating, major part is all to produce steam by heat exchange to generate electricity.But, due to aspects such as system, technological operation and stabilization of equipment performance, there is the situations such as afterheat steam diffuses in a large number, the use of high parameter steam temperature reducing and pressure reducing, cause great energy waste.
Utilize level in order to promote Iron and Steel Enterprises in China afterheat steam, improve heat recovery rate, reduce enterprise's energy consumption per ton steel index, also reduce discharging requirement in order to respond national whole energy simultaneously, be necessary very much deep close examination waste heat steam of steel enterprise feature, study the comprehensive recovery of rational steam and utilize scheme.Application number is that 200820099750.9 Chinese patent has been announced " the iron and steel combined unit that residual heat integrative utilizes ", it enters steam turbine power generation after proposing the vaporization cooling steam of converter and oven to converge, the coke sensible heat of coking and sintering mine sensible heat produce steam by dry coke quenching residual heat boiler and sintering exhaust-heat boiler respectively simultaneously, then enter separately corresponding steam turbine generating.Although this patent has related to iron and steel enterprise's waste heat comprehensive utilization system, but be only also independent to coking and sintering, do not consider according to the feature of two production technologies, fail, according to the policy of energy level coupling utilization, to fail to accomplish " consuming energy according to its quality, temperature counterpart, cascade utilization " simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of comprehensive utilization system for waste heat steam of steel enterprise that can make full use of iron and steel enterprise's production waste heat.
The object of the invention is to be achieved through the following technical solutions: a kind of comprehensive utilization system for waste heat steam of steel enterprise, comprise connected successively sintered flue gas desulfurization device, sintering machine and sintering exhaust-heat boiler, wherein the low parameter steam (vapor) outlet of sintering exhaust-heat boiler is connected with sintering machine, sintered flue gas desulfurization device respectively, the low parameter steam being connected with sintering machine is as used in sintering production vapour, and the low parameter steam being connected with sintered flue gas desulfurization device is as sintered flue gas desulfurization device vapour;
Be connected with Turbo-generator Set with the dry coke quenching residual heat boiler of coke production matched with devices;
It is characterized in that: the high parameter steam (vapor) outlet of described sintering exhaust-heat boiler is connected with coke production device, Turbo-generator Set respectively, the high parameter steam being connected with coke production device is as coking production high parameter vapour, and the high parameter steam being connected with Turbo-generator Set enters Turbo-generator Set as filling;
The low parameter steam (vapor) outlet of described sintering exhaust-heat boiler is also connected with coke production device, and the low parameter steam being connected with coke production device is as coking production low parameter vapour.
In order further to utilize the high parameter steam of sintering exhaust-heat boiler, the steam branch road that is connected with the first screw expansion motor group is set between described sintering exhaust-heat boiler high parameter steam (vapor) outlet and Turbo-generator Set; The steam discharge of described the first screw expansion motor group is divided into two-way, connects respectively heating plant and steam absorption refrigeration plant.
In order to guarantee the working stability of Turbo-generator Set, between the steam (vapor) outlet of described dry coke quenching residual heat boiler and Turbo-generator Set, be provided with the steam branch road that is connected plant area's medium pressure steam pipe network, plant area's low pressure steam pipe network is connected with the steam line between sintering exhaust-heat boiler high parameter steam (vapor) outlet and Turbo-generator Set.
For in the time that sintering machine is stopped transport, maintain the stable of coking production, plant area's low pressure steam pipe network is also drawn two-way steam branch pipe, is connected respectively, is connected with the low parameter steam inlet of coke production device through the second screw expansion motor group with the high parameter steam inlet of coke production device;
The low pressure steam being directly connected with coke production device is as coking production high parameter vapour, and the steam being connected with coke production device through the second screw expansion motor group is as coking production low parameter vapour.
Turbo-generator Set is wherein for mending solidifying formula Turbo-generator Set;
Sintering exhaust-heat boiler is two pressure boilers or is that two covers or two covers are pressed boiler with the different list of upward pressure.
The present invention has taken into full account coking and two process systems of sintering are arranged in the region of whole Iron And Steel Plant, the UTILIZATION OF VESIDUAL HEAT IN of these two production technologies is organically combined, according to the feature of waste heat and the parameter characteristic of afterheat steam thereof separately, the policy of utilizing according to energy level coupling, accomplish " consuming energy according to its quality, temperature counterpart, cascade utilization ", avoid the generation of the situations such as afterheat steam diffuses in a large number, the use of high parameter steam temperature reducing and pressure reducing, improved to greatest extent afterheat steam utilization ratio.Meanwhile, plant area's steam pipe system is introduced to afterheat steam utilization system, guaranteed the stable of process steam.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In figure, part 1 is plant area's medium pressure steam pipe network, and part 2 is plant area's low pressure steam pipe network, part 3 is dry coke quenching residual heat boiler, part 4 Turbo-generator Set, part 5 is heating plant, part 6 is steam absorption refrigeration plant, part 7 is the first screw expansion motor group, part 8 is sintering exhaust-heat boiler, and part 9 is sintering machine, and part 10 is sintered flue gas desulfurization device, part 11 is coke production device, and part 12 is the second screw expansion motor group.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of comprehensive utilization system for waste heat steam of steel enterprise, comprise connected successively sintered flue gas desulfurization device 10, sintering machine 9 and sintering exhaust-heat boiler 8, wherein the low parameter steam (vapor) outlet of sintering exhaust-heat boiler 8 is connected with sintering machine 9, sintered flue gas desulfurization device 10 respectively, the low parameter steam being connected with sintering machine 9 is as used in sintering production vapour, and the low parameter steam being connected with sintered flue gas desulfurization device 10 is as sintered flue gas desulfurization device 10 use vapour;
The dry coke quenching residual heat boiler 3 supporting with coke production device 11 is connected with Turbo-generator Set 4;
The high parameter steam (vapor) outlet of described sintering exhaust-heat boiler 8 is connected with coke production device 11, Turbo-generator Set 4 respectively, the high parameter steam being connected with coke production device 11 is as coking production high parameter vapour, and the high parameter steam being connected with Turbo-generator Set 4 enters Turbo-generator Set 4 as filling;
The low parameter steam (vapor) outlet of described sintering exhaust-heat boiler 8 is also connected with coke production device 11, and the low parameter steam being connected with coke production device 11 is as coking production low parameter vapour.
The steam branch road that is connected with the first screw expansion motor group 7 is set between described sintering exhaust-heat boiler 8 high parameter steam (vapor) outlets and Turbo-generator Set 4; The steam discharge of described the first screw expansion motor group 7 is divided into two-way, connects respectively heating plant 5 and steam absorption refrigeration plant 6.
Between the steam (vapor) outlet of described dry coke quenching residual heat boiler 3 and Turbo-generator Set 4, be provided with the steam branch road that is connected plant area's medium pressure steam pipe network 1, plant area's low pressure steam pipe network 2 is connected with the steam line between sintering exhaust-heat boiler 8 high parameter steam (vapor) outlets and Turbo-generator Set 4.
Plant area's low pressure steam pipe network 2 is also drawn two-way steam branch pipe, is connected respectively, is connected with the low parameter steam inlet of coke production device 11 through the second screw expansion motor group 12 with the high parameter steam inlet of coke production device 11;
The low pressure steam being directly connected with coke production device 11 is as coking production high parameter vapour, and the steam being connected with coke production device 11 through the second screw expansion motor group 12 is as coking production low parameter vapour.
Wherein Turbo-generator Set is for mending solidifying formula Turbo-generator Set, and sintering exhaust-heat boiler is two pressure boilers.
Specific works flow process is: in the 3.82MPa that dry coke quenching residual heat boiler produces, press superheated vapor to promote Turbo-generator Set generating as main steam.In 2.0～2.3MPa time that sintering exhaust-heat boiler produces, press a superheated vapor part as coking production high parameter vapour, another part is as vapour or absorption refrigeration in summer unit vapour for winter heating after doing work by the first screw expansion motor group, and remaining part enters Turbo-generator Set as filling.0.4～0.6MPa low-pressure superheated steam that sintering exhaust-heat boiler produces is mainly used in SINTERING PRODUCTION, sintered flue gas desulfurization device and coking production.In order to maintain stable that Turbo-generator Set exerts oneself, from plant area's medium pressure steam pipe network and plant area's low pressure steam pipe network respectively Yin Yi road steam enter Turbo-generator Set.In the time that sintering machine is stopped transport, in order to maintain the stable of coking production, draw two-way steam from plant area's low pressure steam pipe network and enter coking system, one tunnel is directly as the high parameter steam vapour of coking production, another road after the second screw expansion motor group acting pressure and temperature reducing as the low parameter steam vapour of coking production.
Claims (7)
1. a comprehensive utilization system for waste heat steam of steel enterprise, comprise connected successively sintered flue gas desulfurization device (10), sintering machine (9) and sintering exhaust-heat boiler (8), wherein the low parameter steam (vapor) outlet of sintering exhaust-heat boiler (8) is connected with sintering machine (9), sintered flue gas desulfurization device (10) respectively, the low parameter steam being connected with sintering machine (9) is as used in sintering production vapour, and the low parameter steam being connected with sintered flue gas desulfurization device (10) is as vapour for sintered flue gas desulfurization device (10);
The dry coke quenching residual heat boiler (3) supporting with coke production device (11) is connected with Turbo-generator Set (4);
It is characterized in that: the high parameter steam (vapor) outlet of described sintering exhaust-heat boiler (8) is connected with coke production device (11), Turbo-generator Set (4) respectively, the high parameter steam being connected with coke production device (11) is as coking production high parameter vapour, and the high parameter steam being connected with Turbo-generator Set (4) enters Turbo-generator Set (4) as filling;
The low parameter steam (vapor) outlet of described sintering exhaust-heat boiler (8) is also connected with coke production device (11), and the low parameter steam being connected with coke production device (11) is as coking production low parameter vapour.
2. comprehensive utilization system for waste heat steam of steel enterprise as claimed in claim 1, is characterized in that: the steam branch road that is connected with the first screw expansion motor group (7) is set between described sintering exhaust-heat boiler (8) high parameter steam (vapor) outlet and Turbo-generator Set (4); The steam discharge of described the first screw expansion motor group (7) is divided into two-way, connects respectively heating plant (5) and steam absorption refrigeration plant (6).
3. comprehensive utilization system for waste heat steam of steel enterprise as claimed in claim 1 or 2, it is characterized in that: between the steam (vapor) outlet of described dry coke quenching residual heat boiler (3) and Turbo-generator Set (4), be provided with the steam branch road that is connected plant area's medium pressure steam pipe network (1), plant area's low pressure steam pipe network (2) is connected with the steam line between sintering exhaust-heat boiler (8) high parameter steam (vapor) outlet and Turbo-generator Set (4).
4. comprehensive utilization system for waste heat steam of steel enterprise as claimed in claim 3, it is characterized in that: plant area's low pressure steam pipe network (2) is also drawn two-way steam branch pipe, be connected with the high parameter steam inlet of coke production device (11) respectively, be connected with the low parameter steam inlet of coke production device (11) through the second screw expansion motor group (12);
The low pressure steam being directly connected with coke production device (11) is as coking production high parameter vapour, and the steam being connected with coke production device (11) through the second screw expansion motor group (12) is as coking production low parameter vapour.
5. comprehensive utilization system for waste heat steam of steel enterprise as claimed in claim 1, is characterized in that: described Turbo-generator Set (4) is for mending solidifying formula Turbo-generator Set.
6. comprehensive utilization system for waste heat steam of steel enterprise as claimed in claim 1, is characterized in that: described sintering exhaust-heat boiler (8) is two pressure boilers.
7. comprehensive utilization system for waste heat steam of steel enterprise as claimed in claim 1, is characterized in that: described sintering exhaust-heat boiler (8) is that two covers are with the different single boiler of pressing of upward pressure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110270414.2A CN102359400B (en) | 2011-09-14 | 2011-09-14 | Comprehensive utilization system for waste heat steam of steel enterprise |
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| CN201110270414.2A CN102359400B (en) | 2011-09-14 | 2011-09-14 | Comprehensive utilization system for waste heat steam of steel enterprise |
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| CN102359400B true CN102359400B (en) | 2014-05-14 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102997491A (en) * | 2012-11-30 | 2013-03-27 | 山西蓝天环保设备有限公司 | Coal dust fine combustion heating and cooling combined system |
| CN103353239A (en) * | 2013-07-17 | 2013-10-16 | 广州智光节能有限公司 | Improved lime kiln exhaust gas waste heat power generation system and power generation method thereof |
| CN105604621B (en) * | 2014-11-07 | 2017-06-30 | 宝钢工程技术集团有限公司 | The organic Rankine bottoming cycle TRT and its application method of steam are diffused for low pressure |
| CN107131019B (en) * | 2017-06-27 | 2019-07-12 | 山东琦泉能源科技有限公司 | A kind of supplement steam is incorporated to the adjustment system and method for steam main pipe |
| CN109099743B (en) * | 2018-07-02 | 2020-06-30 | 东南大学 | Multi-heat-source waste heat recovery system |
| CN112627922A (en) * | 2020-12-16 | 2021-04-09 | 攀钢集团攀枝花钢钒有限公司 | Metallurgical waste heat steam power generation system |
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| JP2004309067A (en) * | 2003-04-09 | 2004-11-04 | Nippon Steel Corp | Method of using blast furnace gas |
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