CN105200184A - System for dragging converter flue gas induced draft fan by aid of converter steam - Google Patents
System for dragging converter flue gas induced draft fan by aid of converter steam Download PDFInfo
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- CN105200184A CN105200184A CN201510621568.XA CN201510621568A CN105200184A CN 105200184 A CN105200184 A CN 105200184A CN 201510621568 A CN201510621568 A CN 201510621568A CN 105200184 A CN105200184 A CN 105200184A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 239000003546 flue gas Substances 0.000 title claims abstract description 75
- 239000002918 waste heat Substances 0.000 claims abstract description 34
- 238000001816 cooling Methods 0.000 claims abstract description 22
- 238000005338 heat storage Methods 0.000 claims abstract description 20
- 238000009834 vaporization Methods 0.000 claims abstract description 18
- 230000008016 vaporization Effects 0.000 claims abstract description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims abstract description 6
- 238000006392 deoxygenation reaction Methods 0.000 claims abstract description 4
- 239000010687 lubricating oil Substances 0.000 claims description 8
- 239000003921 oil Substances 0.000 claims description 8
- 230000006641 stabilisation Effects 0.000 claims description 4
- 238000011105 stabilization Methods 0.000 claims description 4
- 238000003860 storage Methods 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 7
- 238000009628 steelmaking Methods 0.000 description 7
- 239000000428 dust Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000002360 explosive Substances 0.000 description 3
- 230000000737 periodic effect Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
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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
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Abstract
本发明公开一种利用转炉蒸汽拖动转炉烟气引风机的系统，其包括余热锅炉单元、转炉烟气引风机、蒸汽蓄热稳流单元、汽轮机组单元；余热锅炉单元包括余热锅炉、汽包、除氧器，转炉汽化冷却烟道中的冷却水经加热后产生中低压蒸汽汇集在汽包中，通过压控排气阀产生饱和蒸汽；蒸汽蓄热稳流单元包括储热器、控制阀，储热器存储饱和蒸汽并保证供应稳定的蒸汽流量；汽轮机组单元包括汽轮机、冷凝器、凝结水泵、汽封加热器、低温加热器，蒸汽在汽轮机中膨胀作功后排入冷凝器凝结成水，经凝结水泵增压经过汽封加热器、低温加热器再到余热锅炉单元的除氧器除氧，除氧后的水再通过转炉汽化冷却烟道给水泵增压经过转炉高温烟道；汽轮机拖动转炉烟气引风机运行。
The invention discloses a system for using converter steam to drive a converter flue gas induced draft fan, which includes a waste heat boiler unit, a converter flue gas induced draft fan, a steam heat storage and steady flow unit, and a steam turbine unit; the waste heat boiler unit includes a waste heat boiler, a steam drum , Deaerator, the cooling water in the converter vaporization cooling flue is heated to produce medium and low pressure steam, which is collected in the steam drum, and saturated steam is generated through the pressure control exhaust valve; the steam heat storage and steady flow unit includes a heat storage device, a control valve, The heat storage stores saturated steam and ensures a stable steam flow; the steam turbine unit includes a steam turbine, a condenser, a condensate pump, a seal heater, and a low-temperature heater. The steam expands in the steam turbine and then discharges into the condenser to condense into water , pressurized by the condensate pump, passes through the steam seal heater, low-temperature heater, and then to the deaerator of the waste heat boiler unit for deoxygenation, and the deoxygenated water passes through the converter vaporization cooling flue to feed the water pump and passes through the converter high-temperature flue; the steam turbine Drag the converter flue gas induced draft fan to run.
Description
技术领域technical field
本发明属于转炉余热利用的技术领域，具体地涉及一种利用转炉蒸汽拖动转炉烟气引风机的系统。The invention belongs to the technical field of converter waste heat utilization, and in particular relates to a system for driving a converter flue gas induced draft fan by using converter steam.
背景技术Background technique
转炉炼钢法是世界上最主要的炼钢生产方法，我国80％以上的钢产量来自于转炉。转炉炼钢的每个炼钢周期包括装铁水、吹氧冶炼、倒钢水等过程，间歇产生含大量灰尘和有毒爆炸性气体的烟气。转炉烟气主要气体成份有CO、CO2和N2等，大量一氧化碳等有毒爆炸性气体若有泄漏将造成严重的危害。同时转炉烟气也包含大量的余热，烟气温度高达1400-1600℃，含有很多气体物理显热(1800-2100kJ/Nm3)，一般转炉烟气热值为6000-8000kJ/Nm3。The converter steelmaking method is the most important steelmaking production method in the world, and more than 80% of my country's steel output comes from the converter. Each steelmaking cycle of converter steelmaking includes processes such as charging molten iron, oxygen blowing smelting, pouring molten steel, etc., and intermittently generates smoke containing a large amount of dust and toxic and explosive gases. The main gas components of converter flue gas are CO, CO 2 and N 2 , etc. If a large amount of toxic and explosive gases such as carbon monoxide leak, it will cause serious harm. At the same time, the converter flue gas also contains a large amount of waste heat. The flue gas temperature is as high as 1400-1600°C, and contains a lot of gas physical sensible heat (1800-2100kJ/Nm 3 ). The general converter flue gas calorific value is 6000-8000kJ/Nm 3 .
为了降低能耗和污染物排放，目前国外基本采用烟气湿法回收系统(OG法)或干法烟气回收技术(LT法)，其中OG法约占90％以上。近年来，我国一些钢铁企业引进了国外的转炉烟气回收技术。但我国目前有530多座转炉，仅有20％的转炉回收了转炉烟气，其中有10多座转炉采用干法除尘，其余均采用湿法。无论是OG法或是LT法，它们的一个共同缺点就是：为了避免烟气爆炸危险，转炉的烟气余热只回收了一部分，850-1000℃以下的烟气直接通过喷水或喷雾冷却烟气，热量白白损失，并产生大量的废水，造成二次污染。In order to reduce energy consumption and pollutant emissions, currently foreign countries basically adopt wet flue gas recovery system (OG method) or dry flue gas recovery technology (LT method), of which OG method accounts for more than 90%. In recent years, some iron and steel enterprises in my country have introduced foreign converter flue gas recovery technology. However, there are currently more than 530 converters in my country, and only 20% of the converters have recycled converter flue gas, of which more than 10 converters use dry dust removal, and the rest use wet methods. Whether it is the OG method or the LT method, one of their common shortcomings is that in order to avoid the danger of flue gas explosion, only a part of the waste heat of the flue gas in the converter is recovered, and the flue gas below 850-1000 ° C is directly cooled by spraying water or spraying. , the heat is lost in vain, and a large amount of waste water is generated, causing secondary pollution.
转炉炼钢厂为了节约能源回收余热，烟罩和烟道的冷却采用汽化冷却装置(也称余热锅炉)。由于转炉生产呈周期性，因此排出的烟气余热也是间断的、周期性的，使转炉汽化冷却装置只能间断地产生蒸汽，而且产生蒸汽量的大小及参数随着冶炼周期性的变化。由于产生的蒸汽量及压力波动大，对管网各用户造成很大的冲击，用户无法正常使用。我国有170多台电炉和约3900台套铁合金生产炉，在冶炼过程中同样产生大量的中低温烟气，由于烟气流量和温度波动，目前通过水冷烟道和机力风冷等降温，这种方式非但不能利用这烟气余热，而且还要消耗大量电能，极不合理。由于转炉冶炼产生的烟气具有间歇性、多尘性和爆炸性等特点，其烟气余热有效利用和回收难度大，如何充分利用炼钢炉低品位余热高效发电以节约能源、降低污染的问题已迫在眉睫。我国现有40-100吨转炉600余座，转炉炼钢会产生大量的余热，目前国内有了转炉余热发电技术，也有电机汽轮机混合拖动除尘风机技术，但是发电回收余热的利用率比较低，余热发电机组功率偏小，市场应用不高，混合拖动技术没有蒸汽稳流装置，电机为适应系统工况变化会处于较大波动的运行状态之下，寿命显著降低。目前国内还没有利用转炉烟气余热生产的蒸汽拖动除尘风机的技术。In order to save energy and recover waste heat in converter steelmaking plants, vaporization cooling devices (also known as waste heat boilers) are used for cooling the fume hood and flue. Since the production of the converter is periodic, the waste heat of the exhausted flue gas is also intermittent and periodic, so that the converter vaporization cooling device can only generate steam intermittently, and the amount and parameters of the steam generated change periodically with the smelting. Due to the large fluctuations in the amount of steam generated and the pressure, it has a great impact on the users of the pipe network, and the users cannot use it normally. There are more than 170 electric furnaces and about 3,900 sets of ferroalloy production furnaces in China, which also produce a large amount of medium and low temperature flue gas during the smelting process. Due to fluctuating flue gas flow and temperature, the temperature is currently cooled by water-cooled flue and mechanical air cooling. This method not only cannot utilize the waste heat of the flue gas, but also consumes a large amount of electric energy, which is extremely unreasonable. Due to the intermittent, dusty and explosive characteristics of the flue gas produced by converter smelting, it is difficult to effectively utilize and recover the waste heat of the flue gas. How to make full use of the low-grade waste heat of the steelmaking furnace to generate electricity efficiently to save energy and reduce pollution has been a problem. imminent. There are more than 600 40-100 ton converters in my country. Converter steelmaking will generate a lot of waste heat. At present, there are converter waste heat power generation technology in China, and there is also motor steam turbine mixed drag dust removal fan technology, but the utilization rate of power generation recovery waste heat is relatively low. The power of the waste heat generating set is relatively small, and the market application is not high. The hybrid drive technology does not have a steam stabilization device. The motor will be in a fluctuating operating state to adapt to the change of the system working conditions, and the service life will be significantly reduced. At present, there is no technology in China to use the steam produced by the waste heat of the converter flue gas to drive the dust removal fan.
转炉生产过程中汽化冷却烟道产生的蒸汽会产生集聚的变化，最大蒸汽产生量可达平均蒸汽产生量的2-4倍。一般来说，转炉蒸汽量与转炉烟气产生量具有很大的相关性，烟气产生量较大的时刻也对应着较大的蒸汽产生量，因此本发明提出了采用转炉蒸汽通过汽轮机拖动转炉烟气引风机的系统。During the production process of the converter, the steam generated by the vaporization cooling flue will produce agglomeration changes, and the maximum steam production can reach 2-4 times the average steam production. Generally speaking, there is a great correlation between the amount of converter steam and the amount of smoke generated by the converter, and the time when the amount of smoke generated is relatively large also corresponds to the amount of steam generated. Converter flue gas induced draft fan system.
发明内容Contents of the invention
本发明的技术解决问题是：克服现有技术的不足，提供一种利用转炉蒸汽拖动转炉烟气引风机的系统，其提高了能源的利用效率，实现转炉烟气和拖动工质间的稳定换热，提高工质做功能力，实现对转炉烟气的稳流，能够产生稳定的蒸汽量而使转炉烟气引风机稳定运行。The technical problem of the present invention is: to overcome the deficiencies of the prior art, to provide a system that utilizes the converter steam to drive the converter flue gas induced draft fan, which improves the energy utilization efficiency and realizes the interaction between the converter flue gas and the dragging working medium. Stable heat exchange, improve the working ability of working medium, realize the steady flow of converter flue gas, and can generate stable steam volume to make the converter flue gas induced draft fan run stably.
本发明的技术解决方案是：这种利用转炉蒸汽拖动转炉烟气引风机的系统，其包括余热锅炉单元、转炉烟气引风机，该系统还包括蒸汽蓄热稳流单元、汽轮机组单元；余热锅炉单元包括余热锅炉、汽包、除氧器，转炉汽化冷却烟道中的冷却水经加热后产生中低压蒸汽汇集在汽包中，通过压控排气阀产生饱和蒸汽；蒸汽蓄热稳流单元包括储热器、控制阀，储热器存储饱和蒸汽并保证供应稳定的蒸汽流量；汽轮机组单元包括汽轮机、冷凝器、凝结水泵、汽封加热器、低温加热器，蒸汽在汽轮机中膨胀作功后排入冷凝器凝结成水，经凝结水泵增压经过汽封加热器、低温加热器再到余热锅炉单元的除氧器除氧，除氧后的水再通过转炉汽化冷却烟道给水泵增压经过转炉高温烟道；汽轮机拖动转炉烟气引风机运行。The technical solution of the present invention is: the system using the converter steam to drive the converter flue gas induced draft fan, which includes a waste heat boiler unit, a converter flue gas induced draft fan, the system also includes a steam heat storage and flow stabilization unit, and a steam turbine unit unit; The waste heat boiler unit includes a waste heat boiler, a steam drum, and a deaerator. The cooling water in the converter vaporization cooling flue is heated to produce medium and low pressure steam, which is collected in the steam drum, and saturated steam is generated through the pressure-controlled exhaust valve; steam heat storage and steady flow The unit includes a heat storage device and a control valve. The storage device stores saturated steam and ensures a stable steam flow; the steam turbine unit includes a steam turbine, a condenser, a condensate pump, a seal heater, and a low-temperature heater. The steam expands in the steam turbine. After power is discharged into the condenser to condense into water, pressurized by the condensate pump, passes through the steam seal heater, low-temperature heater, and then to the deaerator of the waste heat boiler unit for deoxygenation, and the deaerated water passes through the converter to vaporize and cool the flue feed water pump The pressurization passes through the high-temperature flue of the converter; the steam turbine drives the induced draft fan for flue gas of the converter to run.
转炉汽化冷却烟道产生的蒸汽会产生急剧的变化，最大蒸汽产生量可达平均蒸汽产生量的2-4倍，转炉蒸汽产生量与转炉烟气产生量具有很大的相关性，烟气产生量较大的时刻也对应着较大的蒸汽产生量，因此本发明采用转炉蒸汽通过汽轮机拖动转炉烟气引风机，这样省去了蒸汽发电的环节，能够最大限度地实现转炉蒸汽的高效利用，所以提高了能源的利用效率，实现转炉烟气和拖动工质间的稳定换热，提高工质做功能力，实现对转炉烟气的稳流，能够产生稳定的蒸汽量而使转炉烟气引风机稳定运行。The steam produced by the converter vaporization cooling flue will change drastically, and the maximum steam production can reach 2-4 times the average steam production. The converter steam production has a great correlation with the converter flue gas production. The flue gas production The larger steam production time also corresponds to a larger steam production, so the present invention uses the converter steam to drive the converter flue gas induced draft fan through the steam turbine, which saves the link of steam power generation and can realize the efficient utilization of the converter steam to the greatest extent , so the energy utilization efficiency is improved, the stable heat exchange between the converter flue gas and the dragging working medium is realized, the working ability of the working medium is improved, the steady flow of the converter flue gas is realized, and the stable steam volume can be generated to make the converter flue gas The air-induced fan runs stably.
附图说明Description of drawings
图1是根据本发明的利用转炉蒸汽拖动转炉烟气引风机的系统的结构示意图。Fig. 1 is a structural schematic diagram of a system for driving a converter flue gas induced draft fan by using converter steam according to the present invention.
图2是根据本发明的汽轮机拖动转炉烟气引风机的联接图。Fig. 2 is a connection diagram of a steam turbine driving a converter flue gas induced draft fan according to the present invention.
具体实施方式Detailed ways
如图1-2所示，这种利用转炉蒸汽拖动转炉烟气引风机的系统，其包括余热锅炉单元、转炉烟气引风机，该系统还包括蒸汽蓄热稳流单元、汽轮机组单元；余热锅炉单元包括余热锅炉、汽包、除氧器，转炉汽化冷却烟道中的冷却水经加热后产生中低压蒸汽汇集在汽包中，通过压控排气阀产生饱和蒸汽；蒸汽蓄热稳流单元包括储热器、控制阀，储热器存储饱和蒸汽并保证供应稳定的蒸汽流量；汽轮机组单元包括汽轮机、冷凝器、凝结水泵、汽封加热器、低温加热器，蒸汽在汽轮机中膨胀作功后排入冷凝器凝结成水，经凝结水泵增压经过汽封加热器、低温加热器再到余热锅炉单元的除氧器除氧，除氧后的水再通过转炉汽化冷却烟道给水泵增压经过转炉高温烟道；汽轮机拖动转炉烟气引风机运行。As shown in Figure 1-2, the system using converter steam to drive the converter flue gas induced draft fan includes a waste heat boiler unit, a converter flue gas induced draft fan, and the system also includes a steam heat storage and steady flow unit and a steam turbine unit; The waste heat boiler unit includes a waste heat boiler, a steam drum, and a deaerator. The cooling water in the converter vaporization cooling flue is heated to produce medium and low pressure steam, which is collected in the steam drum, and saturated steam is generated through the pressure-controlled exhaust valve; steam heat storage and steady flow The unit includes a heat storage device and a control valve. The storage device stores saturated steam and ensures a stable steam flow; the steam turbine unit includes a steam turbine, a condenser, a condensate pump, a seal heater, and a low-temperature heater. The steam expands in the steam turbine. After power is discharged into the condenser to condense into water, pressurized by the condensate pump, passes through the steam seal heater, low-temperature heater, and then to the deaerator of the waste heat boiler unit for deoxygenation, and the deaerated water passes through the converter to vaporize and cool the flue feed water pump The pressurization passes through the high-temperature flue of the converter; the steam turbine drives the induced draft fan for flue gas of the converter to run.
转炉汽化冷却烟道产生的蒸汽会产生急剧的变化，最大蒸汽产生量可达平均蒸汽产生量的2-4倍，转炉蒸汽产生量与转炉烟气产生量具有很大的相关性，烟气产生量较大的时刻也对应着较大的蒸汽产生量，因此本发明采用转炉蒸汽通过汽轮机拖动转炉烟气引风机，这样省去了蒸汽发电的环节，能够最大限度地实现转炉蒸汽的高效利用，所以提高了能源的利用效率，实现转炉烟气和拖动工质间的稳定换热，提高工质做功能力，实现对转炉烟气的稳流，能够产生稳定的蒸汽量而使转炉烟气引风机稳定运行。The steam produced by the converter vaporization cooling flue will change drastically, and the maximum steam production can reach 2-4 times the average steam production. The converter steam production has a great correlation with the converter flue gas production. The flue gas production The larger steam production time also corresponds to a larger steam production, so the present invention uses the converter steam to drive the converter flue gas induced draft fan through the steam turbine, which saves the link of steam power generation and can realize the efficient utilization of the converter steam to the greatest extent , so the energy utilization efficiency is improved, the stable heat exchange between the converter flue gas and the dragging working medium is realized, the working ability of the working medium is improved, the steady flow of the converter flue gas is realized, and the stable steam volume can be generated to make the converter flue gas The air-induced fan runs stably.
另外，所述转炉汽化冷却烟道通过烟气过热器、蒸汽母管与储热器连接，或者通过蒸汽母管与储热器连接。从表1、2可以看出，采用烟气过热器(方案一)可以提高蒸汽参数，以便汽轮机拖动转炉烟气引风机的效率更高。如果不改变当前工作状态，可以直接通过蒸汽母管与储热器连接(方案二)。In addition, the converter vaporization cooling flue is connected to the heat storage through the flue gas superheater and the steam main pipe, or connected to the heat storage through the steam main pipe. It can be seen from Tables 1 and 2 that the use of the flue gas superheater (Scheme 1) can improve the steam parameters so that the efficiency of the steam turbine driving the converter flue gas induced draft fan is higher. If the current working state is not changed, it can be directly connected to the heat storage through the steam main pipe (Scheme 2).
表1Table 1
表2Table 2
另外，所述烟气过热器通过燃烧煤气来提供热源。In addition, the flue gas superheater provides a heat source by burning coal gas.
另外，所述除氧器是真空除氧器或转炉汽化冷却烟道自带的除氧器，这要根据现场情况而定。In addition, the deaerator is a vacuum deaerator or a deaerator attached to the vaporization cooling flue of the converter, which depends on the site conditions.
另外，所述储热器的数量是2台，这2台储热器并联连接。转炉具有周期性工作的特点，因此汽化冷却烟道产生的蒸汽具有间歇性，造成汽包排出蒸汽流量不均，品质波动大，因此需要加设蒸汽储热器改善蒸汽动力均匀性，保证后端拖动风机工作连续，不影响生产工艺正常运行。使用2台储热器可以实现对转炉烟气的稳流，控制本系统来产生稳定的蒸汽量，使汽轮机拖动转炉烟气引风机稳定运行。In addition, the number of the heat accumulators is two, and these two heat accumulators are connected in parallel. The converter has the characteristics of periodic work, so the steam generated by the vaporization cooling flue is intermittent, resulting in uneven flow of steam discharged from the steam drum and large fluctuations in quality. Therefore, it is necessary to add a steam heat storage device to improve the uniformity of steam power and ensure the back-end The drag fan works continuously without affecting the normal operation of the production process. The use of 2 sets of heat accumulators can realize the steady flow of the converter flue gas, control the system to generate a stable steam volume, and make the steam turbine drive the converter flue gas induced draft fan to run stably.
另外，所述蒸汽母管上设有汽水分离器。这样可以使储热器上的水和蒸汽分开。In addition, the steam main pipe is provided with a steam-water separator. This keeps the water and steam on the storage tank separate.
另外，所述汽轮机通过外置润滑油站来提供所需的润滑用油和主汽阀控制用油。汽轮机不带内置式油泵，而是采取外置式润滑油站向汽轮机提供润滑用油和主汽阀控制用油，其外置式润滑油站为集中油站式结构，可同时提供调节油、轴承润滑油、减速器润滑油，并提供一台高位油箱。油站布置于二层平面。In addition, the steam turbine provides required lubricating oil and main steam valve control oil through an external lubricating oil station. The steam turbine does not have a built-in oil pump, but an external lubricating oil station is used to provide lubricating oil and main steam valve control oil to the steam turbine. The external lubricating oil station is a centralized oil station structure, which can provide regulating oil and bearing lubrication at the same time. Oil, reducer lubricating oil, and provide a high oil tank. The gas station is arranged on the second floor.
另外，所述汽轮机的循环冷却水采用冷却塔进行冷却，采用二次循环供水系统。In addition, the circulating cooling water of the steam turbine is cooled by a cooling tower, and a secondary circulating water supply system is adopted.
另外，如图2所示，所述汽轮机通过膜片联轴器、减速器、膜片联轴器、离合器连接到所述转炉烟气引风机，所述转炉烟气引风机通过偶合器连接到电机。机组采用二层水平布置，平行轴结构，汽轮机布置于二层，凝汽器及真空辅机系统布置于基础平面(0m层)，下方双排汽管路布置。汽轮机与减速器采用公用底座，底座经除应力处理，以满足长期使用要求。In addition, as shown in Figure 2, the steam turbine is connected to the converter flue gas induced draft fan through a diaphragm coupling, a reducer, a diaphragm coupling, and a clutch, and the converter flue gas induced draft fan is connected to the motor. The unit is arranged horizontally on the second floor, with a parallel shaft structure. The steam turbine is arranged on the second floor, the condenser and the auxiliary vacuum system are arranged on the foundation plane (0m floor), and the double exhaust pipes are arranged below. The steam turbine and the reducer adopt a common base, and the base has been treated with stress relief to meet long-term use requirements.
另外，在所述转炉烟气引风机和偶合器之间设有离合器。增加离合器用于断开电机与除尘风机之间的驱动动力。In addition, a clutch is provided between the converter flue gas induced draft fan and the coupler. A clutch is added to disconnect the drive power between the motor and the dust removal fan.
另外，所述电机在汽轮机动力不足时提供剩余动力，在汽轮机动力盈余时向外输出电能(类似于发电机)。In addition, the motor provides surplus power when the power of the steam turbine is insufficient, and outputs electric energy (similar to a generator) when the power of the steam turbine is surplus.
下面更具体地说明本发明。The present invention will be described more specifically below.
图1给出了这种转炉汽化冷却烟道蒸汽余热利用系统的一个优选实施例的示意图，具体包括以下3个模块：Figure 1 shows a schematic diagram of a preferred embodiment of this converter vaporization cooling flue steam waste heat utilization system, which specifically includes the following three modules:
模块1－余热锅炉系统：将转炉汽化冷却烟道产生的蒸汽引入蓄热器，将间歇性的蒸汽转化为连续蒸汽，根据转炉烟气引风机流量的需要，供给拖动汽轮机的蒸汽量，实现引风机的稳定连续运行以节约电力。Module 1 - waste heat boiler system: the steam generated by the converter vaporization cooling flue is introduced into the heat accumulator, and the intermittent steam is converted into continuous steam. According to the demand of the flow rate of the converter flue gas induced draft fan, the steam volume for driving the steam turbine is realized. The stable and continuous operation of the induced draft fan saves electricity.
模块2－蒸汽蓄热稳流系统：根据转炉余热间歇性的特点，采用以高效蒸汽汽轮机相配套的蒸汽稳压稳流控制系统，保证产生连续稳定的蒸汽流，满足拖动汽轮机的需求。Module 2 - steam heat storage and steady flow system: According to the intermittent characteristics of converter waste heat, a steam pressure and flow stabilization control system matched with high-efficiency steam turbines is adopted to ensure continuous and stable steam flow to meet the needs of driving steam turbines.
模块3－汽轮机组系统：根据转炉余热蒸汽的技术参数，匹配合适的高效汽轮机组，采用先进的自动控制技术，实现汽轮机拖动转炉烟气引风机的稳定安全运行。Module 3 - steam turbine unit system: according to the technical parameters of the converter waste heat steam, match the appropriate high-efficiency steam turbine unit, and adopt advanced automatic control technology to realize the stable and safe operation of the steam turbine driving the converter flue gas induced draft fan.
以上所述，仅是本发明的较佳实施例，并非对本发明作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属本发明技术方案的保护范围。The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of this invention. The protection scope of the technical solution of the invention.
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