CN107158891A - A kind of coal gasified black water flashed vapour utilizes technique - Google Patents
A kind of coal gasified black water flashed vapour utilizes technique Download PDFInfo
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- CN107158891A CN107158891A CN201710363418.2A CN201710363418A CN107158891A CN 107158891 A CN107158891 A CN 107158891A CN 201710363418 A CN201710363418 A CN 201710363418A CN 107158891 A CN107158891 A CN 107158891A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/20—Treatment of water, waste water, or sewage by degassing, i.e. liberation of dissolved gases
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
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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
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Organic Chemistry (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
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Abstract
Technique is utilized the invention discloses a kind of coal gasified black water flashed vapour, the flashed vapour that coal gasified black water flash tank comes is directly entered in flash distillation gas wash tower, it is washed using clean high temperature shift condensate liquid, high temperature shift condensation stripping is realized while gas washing is flashed；Clean flashed vapour after washing first reclaims after-heat through the useless pot byproduct steam recovery section heat of flashed vapour, then through afterheat heat exchanger；Reclaim the flash steam after heat to sequentially pass through after final cooler cooling, separator gas-liquid separation, the pressurization of flash gas compression machine, send process gas system to recycle active principle therein.The present invention is not provided with grey water preheater, directly flashed vapour is washed using a large amount of clean high temperature shift condensate liquids, thoroughly remove the grey solid impurity particle in flashed vapour, solve device blockage, and flash distillation gas washing is condensed stripping realization in same equipment with high temperature shift, while also achieving flashed vapour carries heat, the recycling of active principle.
Description
Technical field
The invention belongs to chemical technology field, more particularly to it is a kind of be applied to after coal gasified black water flash distillation containing carbon monoxide,
Efficient, energy-conserving and environment-protective the comprehensive utilization process of the flashed vapour of hydrogen, water vapour etc..
Background technology
In synthetic gas production process by coal gasification, coal gas of high temperature, liquid slag and the tiny solid of gasification furnace combustor exit
Grain first passes through gasification furnace shock chamber water-bath washing, cooling, and most of lime-ash particulate is stayed in shock chamber's water, then is washed through venturi
Device, the washing of synthesis gas washing tower are washed, remaining lime-ash is stayed in synthesis gas washing bottom of towe water.Therefore, gasification furnace shock chamber, conjunction
Contain a large amount of lime-ash particulates and dissolved gas into the Heisui River of gas wash tower bottom discharge.For energy-saving and emission-reduction, it is necessary to gasification
Heisui River is flashed, pulp water is separated, by the ash water recycling after processing.Lime-ash particulate in part enters in flashed vapour during black water flash,
Cause flashed vapour subsequent treatment, utilize inconvenience.
The content of the invention
It is an object of the invention to：Technique is utilized there is provided a kind of coal gasified black water flashed vapour for above-mentioned problem,
The technique can thoroughly remove the grey solid impurity particle in flashed vapour, solve conventional black water flash gas thermal recovery unit and block difficult
Topic, reclaims the heat and available gas component in flashed vapour, and the heat reclaimed is subsequently using more rationally, flexibly.
The technical proposal of the invention is realized in this way：A kind of coal gasified black water flashed vapour utilizes technique, it is characterised in that：
The flashed vapour that coal gasified black water flash tank comes is directly entered in flash distillation gas wash tower, by flashing high temperature clean in gas wash tower
Conversion condensate liquid is washed to coal gasified black water flashed vapour, wherein realizing high temperature shift condensation while gas washing is flashed
Stripping；Clean flashed vapour after washing first gives up through flashed vapour and pot byproduct steam and reclaims the partial heat of flashed vapour, then through waste heat
Heat exchanger reclaims the after-heat of flashed vapour；Reclaim the flash steam after heat and sequentially pass through final cooler cooling and separator gas
After liquid separation, the flash distillation pneumatic transmission flash gas compression machine at the top of separator is compressed to certain pressure, and send process gas system, separator
The condensate liquid of bottom is focused on.
Coal gasified black water flashed vapour of the present invention utilizes technique, and the column plate in its described flash distillation gas wash tower is sieve
Plate, the flashed vapour that the coal gasified black water flash tank comes enters flash distillation gas wash tower bottom, and high temperature shift condensate liquid passes through top
Liquid distribution trough enters in tower, flashed vapour and clean high temperature shift condensate liquid counter current contacting in scrubbing tower, is washed by column plate
Wash and mass-and heat-transfer, the lime-ash carried secretly in flashed vapour is washed down and high temperature shift condensate liquid is heated and stripped except ammonia.
Coal gasified black water flashed vapour of the present invention utilizes technique, and the operation operating mode of its flash distillation gas wash tower is：
Pressure in the flash distillation gas wash tower is that the temperature in 0.7~1.1MPaA, the flash distillation gas wash tower is 165~184 DEG C.
Coal gasified black water flashed vapour of the present invention utilizes technique, and its described flashed vapour wash tower bottoms is heated and vapour
Carry except the condensate liquid after ammonia send gasification system to be used as moisturizing.
Coal gasified black water flashed vapour of the present invention utilizes technique, its described flashed vapour give up pot to by-product 0.4~
0.6MPaA low-pressure steam, the low-pressure steam sends into low-pressure steam pipe network, is used for low-voltage customer；The afterheat heat exchanger
To preheat cryogenic media, the heat that the useless pot of flashed vapour exports flashed vapour is further reclaimed.
Coal gasified black water flashed vapour of the present invention utilizes technique, and its described separator, which is used to separate in flashed vapour, to be carried secretly
Liquid, to meet the requirement of flash gas compression machine suction parameter, containing the CO largely dissolved in the condensate liquid of separator bottom2、NH3、
H2S, is focused on together with the acid water of follow-up workshop section.
Coal gasified black water flashed vapour of the present invention utilizes technique, and its described flash gas compression machine is to flash distillation of pressurizeing
Gas, meets H in downstream recovery flashed vapour2, CO available gas technique need.
The present invention is directly entered flash steam scrubbing tower by coal gasified black water flashed vapour, and is not provided with buck preheater, profit
Coal gasified black water flashed vapour is washed with a large amount of clean high temperature shift condensate liquids, the lime-ash in flashed vapour is thoroughly removed
Grain, the problem of solving to carry lime-ash occluding device secretly in flashed vapour, and flash distillation gas washing are with high temperature shift condensation stripping same
Realized in equipment, save the consumption of conversion condensate liquid stripped vapor, the ammonia content of reduction high temperature shift condensate liquid, gasification is brought in reduction into
The ammonia of water system, flashed vapour gives up pot byproduct steam feeding pipe network, using flexible, CO that can be in effective recycling flashed vapour,
H2Deng active principle.
Brief description of the drawings
Fig. 1 is the process flow diagram of the present invention.
Marked in figure：1 is coal gasified black water flash tank, and 2 be flash distillation gas wash tower, and 3 be the useless pot of flashed vapour, and 4 change for waste heat
Hot device, 5 be final cooler, and 6 be separator, and 7 be flash gas compression machine.
Embodiment
Below in conjunction with the accompanying drawings, the present invention is described in detail.
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
As shown in figure 1, a kind of coal gasified black water flashed vapour utilizes technique, the equipment that the technique is used includes flash distillation gas washing
Tower 2, flashed vapour give up pot 3, afterheat heat exchanger 4, final cooler 5, separator 6, flash gas compression machine 7 and connected pipeline.
The technique is specially：The flashed vapour of coal gasified black water flash tank 1 is directly entered in flash distillation gas wash tower 2, is led to
Cross high temperature shift condensate liquid clean in flash distillation gas wash tower to wash coal gasified black water flashed vapour, the flash distillation gas washing
Column plate in tower is sieve plate, and the flashed vapour that the coal gasified black water flash tank comes enters flash distillation gas wash tower bottom, high temperature shift
Condensate liquid is entered in tower by overhead-liquid distributor, and flashed vapour countercurrently connects with clean high temperature shift condensate liquid in scrubbing tower
Touch, by column plate washing and mass-and heat-transfer, the lime-ash carried secretly in flashed vapour is washed down and high temperature shift condensate liquid is heated,
Wherein high temperature shift condensation is realized while gas washing is flashed to strip, and ash of the coal gasified black water flash tank bottom containing lime-ash
Water is continued with into gasification ash water system.Compared with prior art, the present invention is not provided with grey water preheater, with a large amount of, clean
High temperature shift condensate liquid washing flashed vapour, thoroughly remove flashed vapour in grey solid impurity particle, solve flashed vapour in entrainment lime-ash block up
The problem of plug equipment, and flash distillation gas washing and the realization in same equipment of high temperature shift condensation stripping, save conversion condensate liquid
Stripped vapor consumption, the ammonia content of reduction high temperature shift condensate liquid, reduce the ammonia for bringing gasification water system into.
In the present embodiment, the pressure in the flash distillation gas wash tower is 0.7~1.1MPaA, the flash distillation gas wash tower
Interior temperature is 165~184 DEG C, and the supplying gas of condensate liquid after the flashed vapour wash tower bottoms are heated and stripped except ammonia is
System is used as moisturizing.
Wherein, the clean flashed vapour after washing first gives up through flashed vapour and the byproduct steam of pot 3 and reclaims the partial heat of flashed vapour,
The after-heat of flashed vapour is reclaimed through afterheat heat exchanger 4 again, flashed vapour passes through two-stage heat recovery, and the heat of carrying is rationally divided
Level, fully recycling；The useless pot of the flashed vapour is used to 0.4~0.6MPaA of by-product low-pressure steam, the low-pressure steam feeding
Low-pressure steam pipe network, is used for low-voltage customer, has been broken conventional flashed vapour heat and has been only used for preheating gasification ash water, conversion condensate liquid
Steam stripped limitation；The afterheat heat exchanger reclaims the heat that the useless pot of flashed vapour exports flashed vapour to preheat cryogenic media, further
Amount.
Reclaim the flash steam after heat and sequentially pass through final cooler 5 and separator 6, the final cooler is to cool down
Flashed vapour, the separator is used to separate the liquid carried secretly in flashed vapour, to meet the requirement of flash gas compression machine suction parameter, point
Certain pressure is compressed to from the flash distillation pneumatic transmission flash gas compression machine 7 at the top of device, and send process gas system, downstream recovery H is met2、
The technique of the available gas such as CO needs, and makes CO, H in flashed vapour2Be recycled utilization Deng active principle, separator bottom it is cold
Containing the CO largely dissolved in lime set2、NH3、H2S, is focused on together with the acid water of follow-up workshop section.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
Any modifications, equivalent substitutions and improvements made within refreshing and principle etc., should be included in the scope of the protection.
Claims (7)
1. a kind of coal gasified black water flashed vapour utilizes technique, it is characterised in that：The flashed vapour that coal gasified black water flash tank comes is direct
Into in flash distillation gas wash tower, coal gasified black water flashed vapour is entered by the high temperature shift condensate liquid for flashing clean in gas wash tower
Row washing, wherein realizing high temperature shift condensation stripping while gas washing is flashed；Clean flashed vapour after washing is first through dodging
The useless pot byproduct steam of steam and the partial heat for reclaiming flashed vapour, then the after-heat through afterheat heat exchanger recovery flashed vapour；Return
Receive the flash steam after heat to sequentially pass through after final cooler cooling and separator gas-liquid separation, the flash distillation pneumatic transmission at the top of separator
Flash gas compression machine is compressed to certain pressure, and send process gas system, and the condensate liquid of separator bottom is focused on.
2. coal gasified black water flashed vapour according to claim 1 utilizes technique, it is characterised in that：The flash distillation gas wash tower
Interior column plate is sieve plate, and the flashed vapour that the coal gasified black water flash tank comes enters flash distillation gas wash tower bottom, and high temperature shift is cold
Lime set is entered in tower by overhead-liquid distributor, and flashed vapour countercurrently connects with clean high temperature shift condensate liquid in scrubbing tower
Touch, by column plate washing and mass-and heat-transfer, the lime-ash carried secretly in flashed vapour is washed down and high temperature shift condensate liquid is heated
And strip except ammonia.
3. coal gasified black water flashed vapour according to claim 2 utilizes technique, it is characterised in that：The flash distillation gas washing
The operation operating mode of tower is：Pressure in the flash distillation gas wash tower is the temperature in 0.7~1.1MPaA, the flash distillation gas wash tower
Spend for 165~184 DEG C.
4. coal gasified black water flashed vapour according to claim 2 utilizes technique, it is characterised in that：The flash distillation gas wash tower
Condensate liquid after bottom is heated and stripped except ammonia send gasification system to be used as moisturizing.
5. coal gasified black water flashed vapour as claimed in any of claims 1 to 4 utilizes technique, it is characterised in that：Institute
The low-pressure steam that the useless pot of flashed vapour is used to 0.4~0.6MPaA of by-product is stated, the low-pressure steam sends into low-pressure steam pipe network, for low
Pressure user uses；The afterheat heat exchanger reclaims the heat that the useless pot of flashed vapour exports flashed vapour to preheat cryogenic media, further
Amount.
6. coal gasified black water flashed vapour according to claim 5 utilizes technique, it is characterised in that：The separator is used to divide
From the liquid carried secretly in flashed vapour, to meet in the requirement of flash gas compression machine suction parameter, the condensate liquid of separator bottom containing big
Measure the CO of dissolving2、NH3、H2S, is focused on together with the acid water of follow-up workshop section.
7. coal gasified black water flashed vapour according to claim 6 utilizes technique, it is characterised in that：The flash gas compression machine
To the flashed vapour that pressurizes, H in downstream recovery flashed vapour is met2, CO available gas technique need.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710363418.2A CN107158891B (en) | 2017-05-22 | 2017-05-22 | A kind of coal gasified black water flashed vapour utilizes technique |
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| CN201710363418.2A CN107158891B (en) | 2017-05-22 | 2017-05-22 | A kind of coal gasified black water flashed vapour utilizes technique |
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| CN107158891B CN107158891B (en) | 2019-10-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287817A (en) * | 2020-04-03 | 2020-06-16 | 南京天加热能技术有限公司 | Organic Rankine cycle power generation system for recycling black water flash steam waste heat |
| CN112125365A (en) * | 2020-09-23 | 2020-12-25 | 中国天辰工程有限公司 | Coal gasification black water treatment system |
| CN112239682A (en) * | 2020-09-08 | 2021-01-19 | 中石化宁波工程有限公司 | Gasification device slag water flash evaporation gas comprehensive utilization system and method |
| CN113181738A (en) * | 2021-06-16 | 2021-07-30 | 安徽晋煤中能化工股份有限公司 | Gas washing and dust removing device |
| CN113913217A (en) * | 2021-11-22 | 2022-01-11 | 陕西聚能新创煤化科技有限公司 | Gasification shift dissolved gas recovery method and system |
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|---|---|---|---|---|
| CN103695041A (en) * | 2013-12-11 | 2014-04-02 | 华东理工大学 | Method for treating black water of coal gasification system |
| CN105294891A (en) * | 2015-10-20 | 2016-02-03 | 天能化工有限公司 | Method for performing steam stripping on residual VCM in PVC production |
| WO2016145531A1 (en) * | 2015-03-16 | 2016-09-22 | Iogen Corporation | Sulfur dioxide and/or sulfurous acid pretreatment with sulfur dioxide recovery |
| CN106587233A (en) * | 2016-10-12 | 2017-04-26 | 王文领 | Comprehensive utilization method for coal chemical industry gasified black water high-temperature flashing steam |
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2017
- 2017-05-22 CN CN201710363418.2A patent/CN107158891B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103695041A (en) * | 2013-12-11 | 2014-04-02 | 华东理工大学 | Method for treating black water of coal gasification system |
| WO2016145531A1 (en) * | 2015-03-16 | 2016-09-22 | Iogen Corporation | Sulfur dioxide and/or sulfurous acid pretreatment with sulfur dioxide recovery |
| CN105294891A (en) * | 2015-10-20 | 2016-02-03 | 天能化工有限公司 | Method for performing steam stripping on residual VCM in PVC production |
| CN106587233A (en) * | 2016-10-12 | 2017-04-26 | 王文领 | Comprehensive utilization method for coal chemical industry gasified black water high-temperature flashing steam |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111287817A (en) * | 2020-04-03 | 2020-06-16 | 南京天加热能技术有限公司 | Organic Rankine cycle power generation system for recycling black water flash steam waste heat |
| CN112239682A (en) * | 2020-09-08 | 2021-01-19 | 中石化宁波工程有限公司 | Gasification device slag water flash evaporation gas comprehensive utilization system and method |
| CN112125365A (en) * | 2020-09-23 | 2020-12-25 | 中国天辰工程有限公司 | Coal gasification black water treatment system |
| CN113181738A (en) * | 2021-06-16 | 2021-07-30 | 安徽晋煤中能化工股份有限公司 | Gas washing and dust removing device |
| CN113913217A (en) * | 2021-11-22 | 2022-01-11 | 陕西聚能新创煤化科技有限公司 | Gasification shift dissolved gas recovery method and system |
| CN113913217B (en) * | 2021-11-22 | 2022-06-07 | 陕西聚能新创煤化科技有限公司 | Gasification shift dissolved gas recovery method and system |
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