CN203413967U - Sintering afterheat power generating system with surplus steam - Google Patents
Sintering afterheat power generating system with surplus steam Download PDFInfo
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- CN203413967U CN203413967U CN201320288512.3U CN201320288512U CN203413967U CN 203413967 U CN203413967 U CN 203413967U CN 201320288512 U CN201320288512 U CN 201320288512U CN 203413967 U CN203413967 U CN 203413967U
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Abstract
The utility model discloses a sintering afterheat power generating system with surplus steam. The sintering afterheat power generating system comprises a sintering machine, a cooling machine, an afterheat boiler and a power generator in sequential connection, wherein a high-pressure superheater, a high-pressure evaporator, a high-temperature coal economizer, a high-pressure steam pocket, a low-pressure superheater, a low-pressure evaporator, a low-temperature coal economizer and a low-pressure steam pocket are arranged in the afterheat boiler, a steam inlet of the high-pressure superheater is also connected with a saturated steam inlet pipe used for obtaining surplus saturated steam, and a condensed water return pipe used for recovering partial condensed water is also connected onto an output opening of a water feeding pump. The sintering afterheat power generating system with surplus steam has the advantages that the saturated steam inlet pipe is added to the steam inlet of the high-pressure superheater so that the peripheral surplus steam is introduced, the condensed water return pipe is added to the output opening of the water feeding pump for ensuring the water steam balance of the system, so the flow rate of overheated steam at the steam inlet of a steam turbine is improved, the power generating quantity of the whole power generating system is greatly improved, the secondary utilization is realized on the waste gas energy sources, the energy sources are saved, and the environment protection is prompted.
Description
Technical field
The utility model relates to cogeneration technology field, is specifically related to a kind of sintering waste heat generating system with residue steam.
Background technology
Existing latest model sintering waste heat generating system as shown in Figure 1, comprise the sintering machine 27, cooler 1, waste heat boiler 11 and the TRT that connect successively, in cooler 1, be provided with high temperature suction opeing 23, middle temperature suction opeing 22 and low temperature suction opeing 21, in waste heat boiler 11, be provided with successively from top to bottom superheater 31, evaporimeter 41, economizer 51.
Waste heat boiler 11 is provided with two exhaust gas inlet, one is the high-temp waste gas import 25 that is positioned at waste heat boiler top and is connected with high temperature suction opeing 23, another exhaust gas inlet is between superheater 31 and evaporimeter 41 and the middle temperature exhaust gas inlet 24 being jointly connected with low temperature suction opeing 21 with middle temperature suction opeing 22, high-temp waste gas temperature is generally at 400～450 ℃, flow through after superheater 31 heat releases, its temperature is close with middle temperature EGT, approximately 300～350 ℃, after mixing, two strands of waste gas pass through successively from top to bottom evaporimeter 41, economizer 51, the temperature that waste gas is discharged waste heat boiler is generally 100～150 ℃, these waste gas are discharged in atmosphere by chimney 26 through air-introduced machine 19 parts, remainder waste gas and be mixed and enter the wind pond of cooler 1 from the cold wind in the natural environment of air blast 20.
Condensing plant comprises condenser and for condenser 14 provides the cooling tower 15 of refrigerant, in the output of condenser 14, condensate pump 16 is also installed, in time the condensed water of condenser 14 being discharged.The delivery outlet of condensing plant is exported condensed water by an oxygen-eliminating device 17 and a boiler feed pump 18, and oxygen-eliminating device 17 is connected in series with boiler feed pump 18.
Condensed water in condensing plant enters oxygen-eliminating device 17, by feed pump 18, gets in waste heat boiler 11, and to form continuous circulation, condensed water is through the economizer 51 of waste heat boiler 11, by entering drum 91 after economizer 51 heating; Water in drum 91 is got back to drum 91 in the mode of Natural Circulation after seething with excitement by evaporimeter 41 heat absorptions, the saturated vapor of separating from drum 91 is after superheater 31 is overheated, become superheated steam, enter the air intake of steam turbine 12, in the interior expansion acting of steam turbine 12, pushing generator 13 work, the exhaust steam after acting is through the cooling condensate water that becomes of condensing plant, by feed pump 18, export to waste heat boiler, so periodic duty.
Although existing this afterheat generating system adopts hot blast recirculating technique, can not affect under the prerequisite of sintering deposit cooling effect, improves cooling air temperature, improves the grade of residual heat resources.But, from producing actual consideration, there is saturated vapor more than needed in the steel plant at general sintered production line place in steam pipe system, these saturated vapors are from converter steelmaking process or Heating Process for Steel Rolling, the about 1.0MPa of saturated vapour pressure, can utilize these residue steams to be coupled in sintering waste heat generating system, thereby increase the generated energy of afterheat generating system, yet existing sintering waste heat generating system is not considered this point, most of saturated vapor more than needed is wasted, is unfavorable for saving the energy and promotes environmental protection.
Utility model content
The utility model provides a kind of sintering waste heat generating system with residue steam, can address the above problem.
The utility model provides a kind of sintering waste heat generating system with residue steam, comprise the sintering machine connecting successively, cooler, waste heat boiler and TRT, in waste heat boiler, comprise high-pressure superheater, high pressure evaporator, high-temperature economizer and high pressure drum, the air intake of high-pressure superheater, the outlet of high-temperature economizer and high pressure evaporator connect respectively high pressure drum, TRT comprises generator, for generator provides the steam turbine of power and discharges the condensing plant of the steam of steam turbine for condensing, the venthole of high-pressure superheater is connected to turbine high-pressure air intake, the import of high-temperature economizer is for reclaiming the condensed water of condensing plant, the air intake of described high-pressure superheater also connects one for obtaining the saturated vapor steam inlet pipe of saturated vapor more than needed, after described condensing plant, on the delivery outlet of feed pump, also connect a condensate ruturn pipe for recovery section condensed water.
Preferably, the air intake of saturated vapor steam inlet pipe is connected in steam accumulator or the gas-distributing cylinder of heating furnace, converter; The delivery port of condensate ruturn pipe is connected to drum or the oxygen-eliminating device of same heating furnace, converter.
Preferably, in described waste heat boiler, also comprise low-pressure superheater, low pressure evaporator, low-level (stack-gas) economizer and low-pressure drum, the air intake of low-pressure superheater, the outlet of low-level (stack-gas) economizer and low pressure evaporator connect respectively low-pressure drum, the outlet of low-level (stack-gas) economizer is also connected to the import of high-temperature economizer, the import of low-level (stack-gas) economizer is connected to the delivery outlet of feed pump, and the venthole of low-pressure superheater is connected to steam turbine low-pressure air intake.
Preferably, on saturated vapor steam inlet pipe, be provided with one for the logical steam valve closing of control piper, on condensate ruturn pipe, be provided with one for the logical water valve closing of pipeline.
Technique scheme can be found out, because adopting the air intake at high-pressure superheater, the utility model embodiment increases by a saturated vapor steam inlet pipe, to introduce peripheral residue steam, after condensing plant, the delivery outlet of feed pump increases by a condensate ruturn pipe, to guarantee the moisture balance of system, therefore, the flow of steam turbine air intake superheated steam is improved, has greatly improved the generated energy of whole electricity generation system, the waste gas energy is carried out to secondary utilization, save the energy, promote environmental protection.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of sintering waste heat generating system in prior art;
Fig. 2 is with the sintering waste heat generating system structural representation of residue steam in the utility model embodiment 1.
The specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment 1:
The utility model embodiment provides a kind of sintering waste heat generating system with residue steam, as shown in Figure 2, comprise the sintering machine 27 connecting successively, cooler 1, waste heat boiler 11 and TRT, in waste heat boiler 11, comprise high-pressure superheater 3, high pressure evaporator 4, high-temperature economizer 5 and high pressure drum 9, the air intake of high-pressure superheater 3, the outlet of high-temperature economizer 5 and high pressure evaporator 4 connect respectively high pressure drum 9, TRT comprises generator 13, for generator 13 provides the steam turbine 12 of power and discharges the condensing plant 110 of the steam of steam turbine 12 for condensing, the venthole of high-pressure superheater 3 is connected to the high-pressure admission mouth of steam turbine 12, the import of high-temperature economizer 5 is for reclaiming the condensed water of condensing plant 110, the air intake of described high-pressure superheater 3 also connects one for obtaining the saturated vapor steam inlet pipe 28 of saturated vapor more than needed, on the delivery outlet of described feed pump 18, be also connected with a condensate ruturn pipe 29 for recovery section condensed water.
In order to utilize further the energy, raising efficiency, described in the utility model embodiment, in waste heat boiler, also comprise low-pressure superheater 6, low pressure evaporator 7, low-level (stack-gas) economizer 8 and low-pressure drum 10, the outlet of the air intake of low-pressure superheater 6, low-level (stack-gas) economizer 8 and low pressure evaporator 7 connect respectively low-pressure drum 10, the outlet of low-level (stack-gas) economizer 8 is also connected to the import of high-temperature economizer 5, the import of low-level (stack-gas) economizer 8 is connected to the delivery outlet of feed pump 18, and the venthole of low-pressure superheater 6 is connected to the low pressure admission mouth of steam turbine 12.
Pipeline inside for fear of system equipment is oxidized, and the delivery outlet of condensing plant 110 described in the utility model embodiment is exported condensed water by an oxygen-eliminating device 17 and a boiler feed pump 18, and oxygen-eliminating device 17 is connected in series with boiler feed pump 18.Boiler feed pump 18 can be delivered to condensed water in waste heat boiler 11 in time, and formation recycles.
The air intake of the utility model embodiment saturated vapor steam inlet pipe 28 is connected in steam accumulator or the gas-distributing cylinder of heating furnace, converter; The delivery port of condensate ruturn pipe 29 is connected to drum or the oxygen-eliminating device of same heating furnace, converter.Therefore, the steam accumulator of same heating furnace, converter or gas-distributing cylinder are carried a certain amount of saturated vapor more than needed by saturated vapor steam inlet pipe 28 to this afterheat generating system, just by condensate ruturn pipe 29, from this afterheat generating system, reclaimed the condensed water of basic identical amount, make whole system keep moisture balance, sustainable use.
Below in conjunction with Fig. 2, the annexation of the each several part of the afterheat generating system in the utility model embodiment and operation principle are made and being illustrated.
Sintering waste heat generating system with residue steam in the utility model embodiment specifically comprises: sintering machine 27, cooler 1, waste heat boiler 11, high pressure drum 9, low-pressure drum 10, steam turbine 12, generator 13, condenser 14, cooling tower 15, condensate pump 16, oxygen-eliminating device 17, boiler feed pump 18, air blast 20, air-introduced machine 19, chimney 26, saturated vapor steam inlet pipe 28 and condensate ruturn pipe 29, cooler 1 is provided with three waste gas outlets, it is respectively the high-temp waste gas outlet 23 that is positioned at high-temperature region, be arranged in the warm waste gas outlet 22 and the low temperature waste gas outlet 21 that is positioned at low-temperature space of warm area, in waste heat boiler 11, be provided with successively from top to bottom high-pressure superheater 3, high pressure evaporator 4, high-temperature economizer 5, low-pressure superheater 6, low pressure evaporator 7 and low-level (stack-gas) economizer 8, waste heat boiler 11 is provided with two exhaust gas inlet, one is to be positioned at top and to export the 23 high-temp waste gas imports 25 that are connected with high-temp waste gas, another is between high-pressure superheater 3 and high pressure evaporator 4 and the middle temperature exhaust gas inlet 24 being jointly connected with low temperature waste gas outlet 21 with middle temperature waste gas outlet 22, boiler feed pump 18 delivery ports are connected with the import of low-level (stack-gas) economizer 8, the delivery port of boiler feed pump 18 is also connected with condensate ruturn pipe 29, the outlet of low-level (stack-gas) economizer 8 is connected with the water inlet of low-pressure drum 10 with the import of high-temperature economizer 5, the water inlet of low pressure evaporator 7 is connected with the delivery port of low-pressure drum 10, the outlet of low pressure evaporator 7 is connected with the vapour-liquid two-phase import of low-pressure drum 10, the air intake of low-pressure superheater 6 is connected with the venthole of low-pressure drum 10, the venthole of low-pressure superheater 6 is connected with the low pressure admission mouth of steam turbine 12, the delivery port of high-temperature economizer 5 is connected with the water inlet of high pressure drum 9, the water inlet of high pressure evaporator 4 is connected with the delivery port of high pressure drum 9, the delivery port of high pressure evaporator 4 is connected with the vapour-liquid two-phase import of high pressure drum 9, the import of high-pressure superheater 3 is connected with the venthole of high pressure drum 9, high-pressure superheater 3 air intakes are also connected with residue steam steam inlet pipe 28, the outlet of high-pressure superheater 3 is connected with the high-pressure admission mouth of steam turbine 12.Waste heat boiler 11 bottoms are provided with waste gas outlet, these waste gas are discharged in atmosphere by chimney 26 through air-introduced machine 19 parts, remainder waste gas and be mixed and enter the wind pond of cooler 1 from the cold wind in the natural environment of air blast 20, do not affecting under the prerequisite of sintering deposit cooling effect, improve cooling air temperature, to improve the grade of residual heat resources, reclaim more waste heat.
High-pressure superheater 3 outlets of waste heat boiler 11 are connected with steam turbine 12 high-pressure admission mouths by pipeline, and low-pressure superheater 7 outlets are connected with steam turbine 12 low pressure admission mouths by pipeline.The low-level (stack-gas) economizer 8 rear minute two-way ，Yi roads of heating of getting to waste heat boiler 11 by boiler feed pump 18 from the boiler feedwater of oxygen-eliminating device 17 enter low-pressure drum 10, and another road enters high-temperature economizer 5.Water in high pressure drum 9 and low-pressure drum 10 is respectively hung oneself after the 7 heat absorption boilings of high pressure evaporator 4 and low pressure evaporator and is arrived drum separately by natural circulation mode, the saturated vapor of separating from high pressure drum 9 together with the steam of coming in from saturated vapor steam inlet pipe 28 more than needed after high-pressure superheater 3 is overheated, enter the high-pressure admission mouth of steam turbine 12, the saturated vapor of separating from low-pressure drum 10 is after low-pressure superheater 7 is overheated, become low-pressure superheated steam, enter the low pressure admission mouth of steam turbine 12, in the interior expansion acting of steam turbine 12, pushing generator 13 generatings, exhaust steam after acting is through the cooling condensate water that becomes of condenser 14, by condensate pump 16, it is got to oxygen-eliminating device 17, condensate ruturn pipe 29 sends back to the condensed water of residue steam in the boiler-steam dome or oxygen-eliminating device that produces residue steam.
Owing to having supplemented saturated vapor more than needed in steam pipe system, improved the superheat steam flow that enters steam turbine 12, increased generated energy; And in the utility model embodiment, afterheat generating system adopts dual pressure system, has improved the temperature and pressure of steam turbine import superheated steam, thereby has increased generating capacity.Adopt hot blast recirculating technique, do not affecting under the prerequisite of sintering deposit cooling effect, improve cooling air temperature, improved the grade of residual heat resources, improved superheated steam parameter, increased the acting ability of steam, increased generated energy.
The technical scheme of the utility model embodiment is equally applicable to single pressing system and flash system etc., and the technical program that the equal replacement of all employings or equivalent transformation form, within all dropping on the claimed scope of the utility model.
Embodiment 2:
The utility model embodiment is on the basis of above-described embodiment 1, installs one for the logical steam valve closing of control piper on saturated vapor steam inlet pipe, installs one for the logical water valve closing of pipeline on condensate ruturn pipe.When not needing to use saturated vapor more than needed, close in time saturated vapor steam inlet pipe and condensate ruturn pipe, prevent that the energy in this afterheat generating system outwards runs off.
Other structures and operation principle for afterheat generating system in the utility model embodiment all can, referring to the description of above-described embodiment 1, repeat no more herein.
The sintering waste heat generating system with residue steam above the utility model embodiment being provided is described in detail, applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof; , for one of ordinary skill in the art, according to thought of the present utility model, all will change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model meanwhile.
Claims (4)
1. with the sintering waste heat generating system of residue steam, comprise the sintering machine connecting successively, cooler, waste heat boiler and TRT, in waste heat boiler, comprise high-pressure superheater, high pressure evaporator, high-temperature economizer and high pressure drum, the air intake of high-pressure superheater, the outlet of high-temperature economizer and high pressure evaporator connect respectively high pressure drum, TRT comprises generator, for generator provides the steam turbine of power and discharges the condensing plant of the steam of steam turbine for condensing, the venthole of high-pressure superheater is connected to steam turbine, the import of high-temperature economizer is for reclaiming the condensed water of condensing plant, it is characterized in that: the air intake of described high-pressure superheater also connects one for obtaining the saturated vapor steam inlet pipe of saturated vapor more than needed, described condensing plant connects a condensate ruturn pipe for recovery section condensed water.
2. the sintering waste heat generating system with residue steam as claimed in claim 1, is characterized in that: the air intake of saturated vapor steam inlet pipe is connected in steam accumulator or the gas-distributing cylinder of heating furnace, converter; The delivery port of condensate ruturn pipe is connected to drum or the oxygen-eliminating device of same heating furnace, converter.
3. the sintering waste heat generating system with residue steam as claimed in claim 1 or 2, it is characterized in that: in described waste heat boiler, also comprise low-pressure superheater, low pressure evaporator, low-level (stack-gas) economizer and low-pressure drum, the air intake of low-pressure superheater, the outlet of low-level (stack-gas) economizer and low pressure evaporator connect respectively low-pressure drum, the outlet of low-level (stack-gas) economizer is also connected to the import of high-temperature economizer, the import of low-level (stack-gas) economizer is connected to the delivery outlet of feed pump, and the venthole of low-pressure superheater is connected to steam turbine.
4. the sintering waste heat generating system with residue steam as claimed in claim 1 or 2, is characterized in that: on saturated vapor steam inlet pipe, be provided with one for the logical steam valve closing of control piper, be provided with one for the logical water valve closing of pipeline on condensate ruturn pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320288512.3U CN203413967U (en) | 2013-05-23 | 2013-05-23 | Sintering afterheat power generating system with surplus steam |
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| CN201320288512.3U CN203413967U (en) | 2013-05-23 | 2013-05-23 | Sintering afterheat power generating system with surplus steam |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153832A (en) * | 2014-08-13 | 2014-11-19 | 昆明钢铁集团有限责任公司 | Comprehensive efficient power generation method and system by utilization of iron and steel enterprise waste energy |
| CN104296544A (en) * | 2014-10-13 | 2015-01-21 | 中信重工机械股份有限公司 | Low-temperature cogeneration flashing system |
| CN104990421A (en) * | 2015-07-10 | 2015-10-21 | 无锡亿恩科技股份有限公司 | Novel efficient sinter sensible heat recovery technology |
| CN106225491A (en) * | 2016-07-19 | 2016-12-14 | 武汉都市环保工程技术股份有限公司 | Sinter cooler smoke waste heat utilization system and sinter cooler |
-
2013
- 2013-05-23 CN CN201320288512.3U patent/CN203413967U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104153832A (en) * | 2014-08-13 | 2014-11-19 | 昆明钢铁集团有限责任公司 | Comprehensive efficient power generation method and system by utilization of iron and steel enterprise waste energy |
| CN104153832B (en) * | 2014-08-13 | 2016-06-01 | 昆明钢铁集团有限责任公司 | A kind of iron and steel enterprise's complementary energy synthesis efficient electric power generation method and power generation system thereof |
| CN104296544A (en) * | 2014-10-13 | 2015-01-21 | 中信重工机械股份有限公司 | Low-temperature cogeneration flashing system |
| CN104296544B (en) * | 2014-10-13 | 2016-07-06 | 中信重工机械股份有限公司 | A kind of low-temperature cogeneration flash system |
| CN104990421A (en) * | 2015-07-10 | 2015-10-21 | 无锡亿恩科技股份有限公司 | Novel efficient sinter sensible heat recovery technology |
| CN106225491A (en) * | 2016-07-19 | 2016-12-14 | 武汉都市环保工程技术股份有限公司 | Sinter cooler smoke waste heat utilization system and sinter cooler |
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