CN101676523B - Directly cooling coarse coal gas for gasification of airflow bed - Google Patents
Directly cooling coarse coal gas for gasification of airflow bed Download PDFInfo
- Publication number
- CN101676523B CN101676523B CN200910173490.4A CN200910173490A CN101676523B CN 101676523 B CN101676523 B CN 101676523B CN 200910173490 A CN200910173490 A CN 200910173490A CN 101676523 B CN101676523 B CN 101676523B
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- Prior art keywords
- gas
- heat
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- circulation
- cooling
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/067—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle the combustion heat coming from a gasification or pyrolysis process, e.g. coal gasification
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Abstract
The present invention relates to directly cooling coarse coal gas for gasification of an airflow bed. According to the invention, a IGCC (Integrated Gasification Combined Cycle ) plant will propose that a cooler/a saturator cycle is arranged in a coal gas purifier (washing by carbinol at a low temperature), thereby, the heat of water vapour bound in the coal gas may be guided around the coal gas purifier optimum, and the condensation loss of the present scheme is minimized. Furthermore, it is possible to reduce pressure loss in coal gas synthesis path by directly cooling or vaporizing, and the efficiency of the IGCC plant is maximized. .
Description
Technical field
The present invention relates to a kind of for processing the method for crude-gas at IGCC (Integrated Gasification Combined Cycle-integrated gasification combined cycle plants) equipment.
Background technique
If the crude-gas forming in gasification wet dedusting and halogen wash with alkali cleaning after, in crude-gas conversion, further process, and and then carry out gas purification, must crude-gas out from gas conversion is cooling, and corresponding heat is drained.
Wherein operational temperature levels is that water vapor partial pressure in crude-gas determines.Particularly when using IGCC (Integrated Gasification Combined Cycle-integrated gasification combined cycle plants), aspect efficiency optimization, effort feeds back to the heat of output in miscellaneous equipment parts effectively, and makes great efforts to make the minimise loss of pressure of coal gas aspect.
For thering is CO in the situation that consider to have full-chilled entrained flow gasification use
2the IGCC of segregating unit, can affect total efficiency for full-chilled process water temperature.
In use up to the present, the heat that should drain in the rough coal air-flow after crude-gas conversion is realized by a large amount of indirectly heat exchangers, and these heat exchangers cause high pressure loss on the cooling line of coal gas.
In addition,, for having full-chilled entrained flow gasification, with cold deionized water supply process water circulation, wherein, in other process, process water for example carried out further preheating with low pressure steam before Quench.
Summary of the invention
Task of the present invention is to improve the efficiency of IGCC equipment.
This task is accomplished by a kind of method for the treatment of crude-gas, wherein
Include for fluid or solid containing the gasification installation of charcoal fuel and rearmounted combustion gas and the integrated gasification combined cycle plants equipment of steam power station, the crude-gas that carrys out self-gasifying device after CO conversion in cooling battery water directly cooling,
Described cooling battery forms cooler circulation together with heat exchanger,
By described cooler circulation, from crude-gas, take out heat,
Cooling crude-gas is processed in gas cleaning device,
Described heat exchanger forms saturator circulation together with saturator, and
In described saturator, the heat of automatic heat-exchanger flows to the crude-gas having purified in the future.
By the circulation of cooler/saturator is set on gas cleaning device (low-temperature rectisol (rectisol)), the heat as the combination of water vapor composition in coal gas can be guided around gas cleaning device best, and the condensation loss occurring in scheme up till now can be minimized.In addition, the pressure loss in synthetic gas process is reduced by direct cooling or evaporation, and therefore makes the maximizing efficiency of IGCC equipment.Advantageously, after crude-gas conversion, the single-stage of crude-gas or the multistage direct cooling and indirectly heat output by the circulation of cooler/saturator are combined.This makes can reduce in crude-gas side the quantity of heat exchanger, and therefore also reduces the pressure loss of the cooling line of crude-gas.In addition by directly cooling by supplementing water preheating, and with the excessive circulating water flowing out, be transported in the process water circulation on gasification island.Therefore, for example, in gasification inside, island, by low pressure steam, can reduce the heating of process water, and improve the total efficiency of IGCC equipment.In addition can avoid in heat exchanger, occurring the danger of precipitation when process water preheating.
Accompanying drawing explanation
For understanding in desired scope, by accompanying drawing, embodiments of the invention are being described in detail subsequently.
These accompanying drawings are:
Fig. 1: the principle sketch of realizing IGCC of the present invention power station.
Fig. 2: the principle sketch that crude-gas according to the present invention is cooling.
Fig. 3: according to the special scheme of cooler circulation of the present invention.
Identical reference character represents identical parts in the accompanying drawings.
Reference numerals list
1-5,2-5,3-5 heat exchanger crude-gas be cooling/saturator circulation
1-18,2-18 gas cleaning device (low-temperature rectisol)
1-20 is containing charcoal fuel, solid or fluid
1-21 has Quench section and halogen and washes the gasification reactor with alkali cleaning
1-22 synthetic gas
1-23 CO transforming section
1-24 raw coal gas cooling device
1-25 combustion gas and steam power station (GuD)
1-26 electric energy, electric current
1-27 waste water
1-29 make-up water
Crude-gas after 2-1,3-1 CO conversion
2-2,3-2,3-3 cooling battery
2-3,3-7 deliver to the process water circulation on gasification island
Circulation provides supplementing water to cooler for 2-4,3-10
The scrubbed gas of 2-6 after gas cleaning device (low-temperature rectisol)
2-7 saturator
To saturator, circulation provides deionized water (DI) to 2-8
3-4 is for generation of the heat exchanger of low pressure (ND) steam
The gas condensed water of 3-6 deposition
3-9 quantity of heat given up is for the preheating of GuD condensed water
3-11 delivers to the purification stream of waste treating equipment
A part for the circulating water of 3-12 the second cooler circulation
2-13,3-13 are transported to the cooling crude-gas of gas cleaning device (low-temperature rectisol)
2-14,3-14, the circulation of 3-15 pump group cooler
2-16,3-16 heat exchanger produce medium pressure steam
The circulation of 2-19 pump group saturator
2-30 is for the scrubbed gas of combustion gas turbine
The gas condensed water of 3-6 deposition
Embodiment
In order to gasify in gasification reactor (1-21), the carbon-containing fuel of solid or fluid (1-20) is transported in IGCC power station shown in Figure 1 (Integrated Gasification Combined Cycle-integrated gasification combined cycle plants).In gasification reactor, produce the synthetic gas that is rich in carbon monoxide and hydrogen.This synthetic gas is transported to Quench section.In this Quench section, preferably by excessively spraying into process water (1-29), synthetic gas is cooling in known manner.After water Quench, synthetic gas is transported to wet dust removal apparatus and halogen is washed and alkaline cleaner (Venturi (venturi)) in.Then the saturated dustless coal gas (1-22) of water vapor is then transported in CO transducer (1-23).Water for Quench in described Quench section carries gasification residue, ashes for example, and be transported in waste treating equipment (1-27).Through the synthetic gas (2-1,3-1) of conversion, in raw coal gas cooling device (1-24), be cooled to for (1-18) suitable temperature of gas cleaning device (low-temperature rectisol) subsequently.Cold supplementing water (2-4,3-10) is transported in raw coal gas cooling device (1-24), and its water (2-3,3-7) as heating is transported in the process water circulation on gasification island (1-29).The process water circulation on gasification island provides make-up water for described Quench.From raw coal gas cooling device (1-24), by heat exchanger (1-5), heat is outputed to saturator (1-7).In this saturator, the scrubbed gas (2-6) that has passed through gas cleaning device (1-18) is heated with saturated.The scrubbed gas (2-30) that leaves saturator is transported in the combustion gas turbine of combustion gas and steam power station (1-25).This power station provides electric energy (1-26) at output terminal.Deionized water (2-8) is provided to the circulation of saturator.That is to say in this device, when through gas cleaning device, the heat of crude-gas is advanced around gas cleaning device.In special scheme, with heat outputting (3-9), carry out the condensed water of preheated fuel gas and steam power station (1-25).
Fig. 2: in the first order (2-16), by taking out the heat in high-temperature level from CO transforming section (1-23) crude-gas (2-1) out, to press (MD) steam in producing.In cooling battery (2-2), directly water carries out cooling to crude-gas subsequently.By pump group (2-14), make to move in circulation at the water of the bottom of cooling battery deposition, and cooling in one or more heat exchanger (2-5), and be again transported in the cooling battery at top.From cooler circulation, taking out (2-3) is the necessary make-up water (1-29) that gasifies.By the condensed water that deposits in cooling battery and supplementing water (2-4), give cooler periodical feeding, described condensed water is not produce owing to reaching the saturation point of crude-gas.The heat that is discharged into cooler circulation from Gas Flow is directly sent to saturator circulation by heat exchanger (2-5).The task of this saturator circulation is saturator group (2-7), to heat from gas cleaning device (2-18) cold scrubbed gas (2-6) out, and makes it saturated with water vapor.At this, by deionized water (2-8), give saturator periodical feeding.
The device of Fig. 3 has the particularly advantageous wiring diagram of cooler circulation:
By taking out (3-16) heat in high-temperature level from CO transforming section crude-gas (3-1) out, to press (MD) steam in producing.By two cooler circulations (3-2,3-3) in the series connection of coal gas side, from crude-gas, discharge further heat.Enter the circulating water crude-gas of the first cooling battery (2-2) more than saturation point.From circulating water flow, take out the gas condensed water of (3-6) deposition, and and the part (3-12) of the circulating water of described the second cooler circulation mix, and be introduced in the process water circulation on (3-7) gasification island.Preferably in a plurality of level, particularly complete quantity of heat given up from the circulating water of described the first cooler circulation in two levels.In the embodiment shown, in the first order, by producing (3-4) low pressure (ND) steam, in the second level, pass through the described saturator circulation of heating (3-5).In this case, by the generation of low pressure steam, controlling heat outputs in saturator circulation.By pump group (3-14), realize the bridge joint of necessary pressure reduction.
By cooling battery (3-3), pump (3-15) and one or more heat conductor (3-9), form described the second cooler circulation.Low from the temperature levels of this cooling battery circulating water (3-8) out than the first cooler circulation.Preferably described heat output is used for to GuD condensed water preheating (3-9).And then cold supplementing water (3-10) is transported in circulating water, described supplementing water is that gasification is necessary as make-up water (1-29).Its before entering into cooling battery, additionally cooling circulating water, and discharge maximum heat by direct cooling realization from crude-gas (2-1,3-1).In the circulating water depositing in cooling battery, take out a part stream (3-11+3-12), this part stream equals the gas condensed water of deposition and the flow of supplementing water.From described part stream, take out a part stream (3-11) again, this part flows for reducing ammonia, and the ammonia concentration in whole system is minimized.To purify stream (3-11) is transported in waste treating equipment.By remaining stream (3-12) and in the first cooler circulation the gas condensed water of deposition mix (3-6), and be incorporated in process water circulation for gasification.
Cooling rough coal air-flow carries out further cooling (2-17,3-17) according to the requirement of gas purification, and continues to be transported in (3-13) gas cleaning device (low-temperature rectisol) (2-18,3-18).
By IGCC (Integrated Gasification Combined Cycle-integrated gasification combined cycle plants) device, provided special scheme of the present invention, wherein rough coal air-flow (2-1,3-1) is directly cooled by cooling battery after CO conversion.
Claims (11)
1. for the treatment of the method for crude-gas, wherein
Include for fluid or solid containing the gasification installation of charcoal fuel (1-20) and rearmounted combustion gas and the integrated gasification combined cycle plants equipment of steam power station (1-25), the crude-gas (2-1,3-1) that carrys out self-gasifying device CO conversion (1-23) afterwards in cooling battery (2-2) water directly cooling
Described cooling battery (2-2) forms cooler circulation together with heat exchanger (1-5,2-5,3-5),
By described cooler circulation, from crude-gas (2-1,3-1), take out heat,
Cooling crude-gas is processed in gas cleaning device (1-18,2-18),
Described heat exchanger (1-5,2-5,3-5) forms saturator circulation together with saturator (1-7,2-7), and
In described saturator, the heat of automatic heat-exchanger flows to the crude-gas (2-6) having purified in the future.
2. the method for claim 1, is characterized in that, supplementing water (2-4) is provided to described cooler circulation.
3. according to the method described in claim 1 or 2, it is characterized in that, the water of the bottom deposition in cooling battery is flowed to vaporizer for Quench as make-up water (1-29).
4. according to the method described in claim 1 or 2, it is characterized in that, deionized water (2-8) is provided to described saturator circulation.
5. according to the method described in claim 1 or 2, it is characterized in that, in described cooler circulation, before the heat exchanger of saturator circulation (3-5), realize heat output (3-4), to produce low pressure steam.
6. method as claimed in claim 5, is characterized in that, by the generation of low pressure steam, controls heat output in saturator circulation.
7. according to the method described in claim 1 or 2, it is characterized in that, surpass the cooling crude-gas in saturation point ground.
8. according to the method described in claim 1 or 2, it is characterized in that, crude-gas in cooling battery (3-2) afterwards and cooling in the second cooling battery (3-3) before at gas cleaning device (1-18,2-18), wherein by by formed the second cooler circulation heat outputting of described the second cooling battery (3-3), pump (3-15) and heat conductor (3-9).
9. method as claimed in claim 8, is characterized in that, supplementing water (3-10) is provided to described the second cooler circulation.
10. according to the method described in claim 1 or 2, it is characterized in that, in being transported to cooling battery (2-2,3-2), from crude-gas (2-1,3-1), take out before heat, to produce medium pressure steam (2-16,3-16).
11. in accordance with the method for claim 8, it is characterized in that, by being used for combustion gas and steam power station condensed water to carry out preheating by formed the second cooler circulation heat outputting of described the second cooling battery (3-3), pump (3-15) and heat conductor (3-9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102008047930.6 | 2008-09-19 | ||
| DE200810047930 DE102008047930B4 (en) | 2008-09-19 | 2008-09-19 | Direct raw gas cooling in the flow stream gasification |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101676523A CN101676523A (en) | 2010-03-24 |
| CN101676523B true CN101676523B (en) | 2014-07-30 |
Family
ID=41794829
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910173490.4A Expired - Fee Related CN101676523B (en) | 2008-09-19 | 2009-09-18 | Directly cooling coarse coal gas for gasification of airflow bed |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101676523B (en) |
| DE (1) | DE102008047930B4 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010026172B4 (en) * | 2010-07-06 | 2018-04-26 | Siemens Aktiengesellschaft | Process for preventing deposits of carbonate-rich waters in the flow stream gasification |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4202167A (en) * | 1979-03-08 | 1980-05-13 | Texaco Inc. | Process for producing power |
| EP0127092B1 (en) * | 1983-05-31 | 1987-04-22 | Kraftwerk Union Aktiengesellschaft | Intermediate-power plant with an integrated coal-gasification installation |
| CN1045156A (en) * | 1989-02-23 | 1990-09-05 | 安塞国际投资有限公司 | The improvement of convolution gasification hybrid power generation station operation mobility |
| CN1056089A (en) * | 1991-05-25 | 1991-11-13 | 北京化工学院 | Utilize heat pump to reclaim the method for conversion process waste heat |
| US5715671A (en) * | 1991-03-11 | 1998-02-10 | Jacobs Engineering Limited | Clean power generation using IGCC process |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3327367A1 (en) * | 1983-07-29 | 1985-02-14 | Kraftwerk Union AG, 4330 Mülheim | Medium-load power station with an integrated coal gasification plant |
-
2008
- 2008-09-19 DE DE200810047930 patent/DE102008047930B4/en not_active Expired - Fee Related
-
2009
- 2009-09-18 CN CN200910173490.4A patent/CN101676523B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4202167A (en) * | 1979-03-08 | 1980-05-13 | Texaco Inc. | Process for producing power |
| EP0127092B1 (en) * | 1983-05-31 | 1987-04-22 | Kraftwerk Union Aktiengesellschaft | Intermediate-power plant with an integrated coal-gasification installation |
| CN1045156A (en) * | 1989-02-23 | 1990-09-05 | 安塞国际投资有限公司 | The improvement of convolution gasification hybrid power generation station operation mobility |
| US5715671A (en) * | 1991-03-11 | 1998-02-10 | Jacobs Engineering Limited | Clean power generation using IGCC process |
| CN1056089A (en) * | 1991-05-25 | 1991-11-13 | 北京化工学院 | Utilize heat pump to reclaim the method for conversion process waste heat |
Also Published As
| Publication number | Publication date |
|---|---|
| DE102008047930B4 (en) | 2015-05-13 |
| DE102008047930A1 (en) | 2010-04-08 |
| CN101676523A (en) | 2010-03-24 |
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