CN203833899U - Dirty steam heat recycling system in coal gasification process - Google Patents

Dirty steam heat recycling system in coal gasification process Download PDF

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Publication number
CN203833899U
CN203833899U CN201420133032.4U CN201420133032U CN203833899U CN 203833899 U CN203833899 U CN 203833899U CN 201420133032 U CN201420133032 U CN 201420133032U CN 203833899 U CN203833899 U CN 203833899U
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China
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heat
dirty
steam
dirty steam
recycling system
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Expired - Fee Related
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CN201420133032.4U
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Chinese (zh)
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吕冰洋
李相军
牛巧霞
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吕冰洋
李相军
牛巧霞
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/10Process efficiency
    • Y02P20/129Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines

Abstract

The utility model belongs to the technical field of coal chemical industry and particularly relates to a dirty steam heat recycling system in a coal gasification process. The dirty steam heat recycling system in the coal gasification process comprises two heat collectors and a condensate separator; the inlet of the first heat collector is connected with a dirty steam pipe and used for transmitting a part of heat of passing dirty steam to a boiler water feeding unit, and the outlet of the boiler water feeding unit is connected to a steam turbine; the second heat collector is connected with the dirty steam pipe of the outlet of the first heat collector and used for exchanging a part of heat of the passing dirty steam and providing the heat to an organic working medium circulation generating device; the condensate separator is connected with the dirty steam pipe of the outlet of the second heat collector and used for separating the dirty steam out, the top of the condensate separator is connected with a burner for partially burning the gas, the middle of the condensate separator is connected with a deaerator to recycling liquid, and the lower portion of the condensate separator is connected with a settling tank for settling a part of condensate with a high solid content. The dirty steam heat recycling system in the coal gasification process can recover the heat energy of the dirty steam relatively safely and is high in heat recovery efficiency and utilization rate, low in output-input ratio, simple in operation, safe and reliable.

Description

Dirty steam heat recycling system in coal gasifying process flow process
Technical field
The utility model belongs to technical field of coal chemical industry, specifically relates to the recycling system of the dirty steam producing in coal gasifying process flow process.
Background technology
In coal gasifying process, needing to use a large amount of water carries out cooling, water becomes the saturated sewage of high pressure after vapourizing furnace, saturated sewage produces a large amount of dirty steams after reducing valve in hp flash drum, when vapourizing furnace working pressure in by the coal gasifying process flow process of 6.5MPa (G) the dirty steam of product be 0.8MPa (G), the saturated dirty steam of 175 DEG C, owing to containing micro-cinder particle, hydrogen, carbon monoxide, carbonic acid gas and hydrogen sulfide etc. in dirty steam, so never well utilize approach.
Current processing mode is that first saturated dirty steam passes through grey water-to-water heat exchanger, buck is heated, the dirty steam of ash discharge water-to-water heat exchanger becomes the air-water mixture (containing a small amount of phlegma) of 175 DEG C, then enter water recirculator, phlegma recycling use, causes a large amount of energy wastages like this.
When vapourizing furnace working pressure in by the coal gasifying process flow process of 4.0MPa (G) the dirty steam of product be 0.5MPa (G), the saturated dirty steam of 149 DEG C, a part in saturated dirty steam is removed deoxygenator or saturated hot-water tower, and remainder is with regard to the not good approach that utilizes.Coal gasification apparatus produces a large amount of dirty steams, because dirty steam contains micro-corrodibility, insoluble gas, also contain micro-coal ash molecule, so what do not had utilizes approach, current most of device is after circulating water, by the recycling use of dirty vapour condensation liquid, cause a large amount of energy wastages.
The utility model is by the research of the character to dirty steam, and the combination situation such as structure, result of use of the good grey water-to-water heat exchanger of gasification result of use at present, and research is applicable to the recycling of dirty steam in coal gasifying process flow process.
Utility model content
For solving problems of the prior art, the purpose of this utility model is to provide dirty steam heat recycling system in a kind of coal gasifying process flow process, can more thoroughly reclaim the heat energy of dirty steam, and heat recovery efficiency is high; Utilization ratio is high; Input-output ratio is little, simple to operate, safe and reliable.
For achieving the above object, the utility model is to realize by following technical scheme.
Dirty steam heat recycling system in a kind of coal gasifying process flow process is provided, this system comprises two heat recoverers and condensate separator, the first heat recoverer entrance connects dirty vapour pipe, for the dirty steam part heat of process is transferred to oiler feed, the oiler feed outlet after heating is connected on steam turbine; The second heat recoverer connects the dirty vapour pipe of the first heat recoverer outlet, for by the dirty steam part thermal exchange of process, supplies with organic working medium circulation electric generating apparatus; Condensate separator connects the dirty vapour pipe of the second heat recoverer outlet, for dirty steam is separated, top connects torch makes gas partial combustion, and middle part connects deoxygenator makes liquid circulation utilization, and bottom connects subsider makes the partial condensation liquid sedimentation that solids content is high.
Above-described system is provided with a heat exchanger before being also included in the first heat recoverer, and dirty steam is heated into low-pressure steam by heat exchanger by oiler feed.
Further, described system is provided with a grey water heater before being also included in heat exchanger, and dirty steam heats high pressure buck by grey water heater.
After recovery of heat, the heat energy of dirty steam is converted into the saturated low-pressure steam of cleaning of two grades, the 0.5MPa low-pressure steam that heat exchanger place produces and first dirty the first heat recoverer place produce the 0.1-0.2MPa low-pressure steam as the steam turbine energy.
Vapour condensation liquid directly degassing deoxygenator recycles.
The technical solution of the utility model, its beneficial effect is, can more thoroughly reclaim the heat energy of dirty steam, heat recovery efficiency is high; Utilization ratio is high; Input-output ratio is little, simple to operate, safe and reliable.
Brief description of the drawings
Fig. 1 is the structure flow chart of the heat recovery system of embodiment 1 of the present utility model.
Fig. 2 is the structure flow chart of the heat recovery system of embodiment 2 of the present utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the technical solution of the utility model is elaborated.
Shown in Fig. 1, in the coal gasifying process flow process of embodiment 1, dirty steam heat recycling system comprises grey water heater 1, heat exchanger 2, two heat recoverers 3, 4 and condensate separator 8, being mainly used in vapourizing furnace working pressure is in the coal gasifying process flow process of 6.5MPa (G), the saturated sewage that gasification produces is producing a large amount of 0.8MPa (G) after reducing valve in hp flash drum, the saturated dirty steam of 175 DEG C, dirty steam first carries out part thermal exchange by grey water heater 1, the high pressure buck of process is carried out to heating recovery part heat, then dirty steam is heated oiler feed is heated into the saturated low-pressure steam of 0.5MPa (G) by heat exchanger 2, being incorporated to low-pressure steam pipe network uses.
Dirty steam continues, through the first heat recoverer 3, part heat is transferred to oiler feed, oiler feed transfers low-pressure steam to and is transported to steam turbine 5 as the energy after by dirty steam-heated cal(l)andria, driving steam turbine carries out work, then low-pressure steam enters the tank 6 condensing of condensing, and pumps Desultwater Station by pump; Dirty steam after the first heat recoverer 3 again through the second heat recoverer 4 by part thermal exchange, produce the saturated vapo(u)r of 0.1-0.2MPa (G), supply with organic working medium circulation electric generating apparatus 7, after the dirty vapour condensation of two heat recoverers, temperature is reduced to 85-100 DEG C, finally in condensate separator 8, separate, gas part is delivered to torch burning, middle part liquid is delivered to deoxygenator recycle, and the partial condensation liquid that condensate separator bottom solids content is high is delivered to subsider.
Shown in Fig. 2, in the coal gasifying process flow process of embodiment 2, dirty steam heat recycling system comprises two heat recoverers 3, 4 and condensate separator 8, being mainly used in vapourizing furnace working pressure is in the coal gasifying process flow process of 4.0MPa (G), the saturated sewage that gasification produces is producing a large amount of 0.5MPa (G) after reducing valve in hp flash drum, the saturated dirty steam of 149 DEG C, dirty steam is transferred to oiler feed through the first heat recoverer 3 by part heat, oiler feed transfers low-pressure steam to and is transported to steam turbine 5 as the energy after by dirty steam-heated cal(l)andria, driving steam turbine carries out work, then low-pressure steam enters the tank 6 condensing of condensing, pump Desultwater Station by pump, dirty steam after the first heat recoverer 3 again through the second heat recoverer 4 by part thermal exchange, produce the saturated vapo(u)r of 0.1-0.2MPa (G), supply with organic working medium circulation electric generating apparatus 7, after the dirty vapour condensation of two heat recoverers, temperature is reduced to 85-100 DEG C, finally in condensate separator, separate, gas part is delivered to torch burning, middle part liquid is delivered to deoxygenator recycle, and the partial condensation liquid that condensate separator bottom solids content is high is delivered to subsider.Dirty steam heat recycling system of the present utility model can effectively utilize the heat of dirty steam, avoids unordered discharge and energy wastage.

Claims (3)

1. a dirty steam heat recycling system in coal gasifying process flow process, is characterized in that: comprise two heat recoverers and condensate separator;
The first heat recoverer entrance connects dirty vapour pipe, and for the dirty steam part heat of process is transferred to oiler feed, the oiler feed outlet after heating is connected on steam turbine;
The second heat recoverer connects the dirty vapour pipe of the first heat recoverer outlet, for by the dirty steam part thermal exchange of process, supplies with organic working medium circulation electric generating apparatus;
Condensate separator connects the dirty vapour pipe of the second heat recoverer outlet, for dirty steam is separated, top connects torch makes gas partial combustion, and middle part connects deoxygenator makes liquid circulation utilization, and bottom connects subsider makes the partial condensation liquid sedimentation that solids content is high.
2. dirty steam heat recycling system in coal gasifying process flow process according to claim 1, it is characterized in that: described system is provided with a heat exchanger before being also included in the first heat recoverer, for making dirty steam that oiler feed is heated into low-pressure steam.
3. dirty steam heat recycling system in coal gasifying process flow process according to claim 2, is characterized in that: described system is provided with a grey water heater before being also included in heat exchanger, for dirty steam is heated high pressure buck.
CN201420133032.4U 2014-03-24 2014-03-24 Dirty steam heat recycling system in coal gasification process Expired - Fee Related CN203833899U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420133032.4U CN203833899U (en) 2014-03-24 2014-03-24 Dirty steam heat recycling system in coal gasification process

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Application Number Priority Date Filing Date Title
CN201420133032.4U CN203833899U (en) 2014-03-24 2014-03-24 Dirty steam heat recycling system in coal gasification process

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105713113A (en) * 2014-12-05 2016-06-29 中国石油天然气股份有限公司 Method for recovering heat from gas phase materials in condensation pot

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105713113A (en) * 2014-12-05 2016-06-29 中国石油天然气股份有限公司 Method for recovering heat from gas phase materials in condensation pot

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Granted publication date: 20140917

Termination date: 20150324

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