CN107158891B - 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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- CN107158891B CN107158891B CN201710363418.2A CN201710363418A CN107158891B CN 107158891 B CN107158891 B CN 107158891B CN 201710363418 A CN201710363418 A CN 201710363418A CN 107158891 B CN107158891 B CN 107158891B
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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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- Life Sciences & Earth Sciences (AREA)
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- Oil, Petroleum & Natural Gas (AREA)
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Abstract
The invention discloses a kind of coal gasified black water flashed vapours to utilize technique, 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 flashing gas washing;Clean flashed vapour after washing first gives up pot byproduct steam recovery section heat through flashed vapour, then recycles after-heat through afterheat heat exchanger;Flash steam after recycling heat successively 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 realize flash distillation gas washing in the same device with high temperature shift condensation stripping, while also achieving the recycling that flashed vapour carries heat, active principle.
Description
Technical field
The invention belongs to chemical technology field, in particular to it is a kind of be applied to after coal gasified black water flash distillation containing carbon monoxide,
Efficient, the energy-saving and environment-friendly comprehensive utilization process of the flashed vapour of hydrogen, water vapour etc..
Background technique
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 particle 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 tower bottom water.Therefore, gasification furnace shock chamber, conjunction
At in the Heisui River of gas wash tower bottom discharge contain a large amount of lime-ash particles and dissolved gas.For energy-saving and emission-reduction, need to gasification
Heisui River is flashed, pulp water separates, will treated ash water recycling.Part lime-ash particle enters in flashed vapour when black water flash,
Lead to flashed vapour subsequent processing, utilize inconvenience.
Summary of the invention
It is an object of the invention to: in view of the above problems, provide a kind of coal gasified black water flashed vapour using technique,
The technique can thoroughly remove the grey solid impurity particle in flashed vapour, and it is difficult to solve previous black water flash gas thermal recovery unit blocking
Topic recycles heat and available gas component in flashed vapour, and the heat recycled is subsequent using more rationally, flexibly.
The technical scheme of the present invention is realized as follows: 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, passes through high temperature clean in flash distillation gas wash tower
Transformation condensate liquid washs coal gasified black water flashed vapour, wherein realizing high temperature shift condensation while flashing gas washing
Stripping;Clean flashed vapour after washing first gives up through flashed vapour and pot byproduct steam and recycles the partial heat of flashed vapour, then through waste heat
The after-heat of heat exchanger recycling flashed vapour;Flash steam after recycling heat successively passes 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 focuses on.
Coal gasified black water flashed vapour of the present invention utilizes technique, and the column plate in the flash distillation gas wash tower is sieve
Plate, the flashed vapour that the coal gasified black water flash tank comes enter flash distillation gas wash tower lower part, and high temperature shift condensate liquid passes through top
Liquid distribution trough enters in tower, and flashed vapour and clean high temperature shift condensate liquid counter current contacting in scrubbing tower are washed by column plate
Simultaneously mass-and heat-transfer is washed, the lime-ash carried secretly in flashed vapour is washed down and high temperature shift condensate liquid is heated and strips except ammonia.
Coal gasified black water flashed vapour of the present invention utilizes technique, the operation operating condition of the flash distillation gas wash tower are as follows:
Pressure in the flash distillation gas wash tower is 0.7~1.1MPa, and the temperature in the flash distillation gas wash tower is 165~184 DEG C.
Coal gasified black water flashed vapour of the present invention utilizes technique, and the flashed vapour wash tower bottoms are heated and vapour
It mentions except the condensate liquid after ammonia send gasification system to be used as moisturizing.
Coal gasified black water flashed vapour of the present invention utilize technique, the flashed vapour give up pot to by-product 0.4~
The low-pressure steam of 0.6MPa, the low-pressure steam are sent into low-pressure steam pipe network, use for low-voltage customer;The afterheat heat exchanger is used
To preheat cryogenic media, the heat of the useless pot outlet flashed vapour of flashed vapour is further recycled.
Coal gasified black water flashed vapour of the present invention utilizes technique, and the separator is carried secretly for separating in flashed vapour
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 subsequent workshop section.
Coal gasified black water flashed vapour of the present invention utilizes technique, and the flash gas compression machine is to flash distillation of pressurizeing
Gas meets H in downstream recovery flashed vapour2, CO available gas process requirement.
The present invention is directly entered flash steam scrubbing tower by coal gasified black water flashed vapour, and is not provided with buck preheater, benefit
Coal gasified black water flashed vapour is washed with a large amount of clean high temperature shift condensate liquids, thoroughly removes the lime-ash in flashed vapour
Grain solves the problems, such as to carry lime-ash occluding device in flashed vapour secretly, and flashes gas washing with high temperature shift condensation stripping same
It is realized in equipment, gasification is brought in the ammonia content saved the consumption of transformation condensate liquid stripped vapor, reduce high temperature shift condensate liquid, reduction into
The ammonia of water system, the flashed vapour pot byproduct steam that gives up are sent into pipe network, using flexible, can CO in effective recycling flashed vapour,
H2Equal active principles.
Detailed description of the invention
Fig. 1 is process flow diagram of the invention.
Marked in the figure: 1 is coal gasified black water flash tank, 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.
Specific embodiment
With reference to the accompanying drawing, the present invention is described in detail.
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
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 which uses includes flash distillation gas washing
The useless pot 3 of tower 2, flashed vapour, afterheat heat exchanger 4, final cooler 5, separator 6, flash gas compression machine 7 and connected pipeline.
The technique specifically: the flashed vapour of coal gasified black water flash tank 1 is directly entered in flash distillation gas wash tower 2, is led to
It crosses 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 lower part, high temperature shift
Condensate liquid is entered in tower by overhead-liquid distributor, and flashed vapour countercurrently connects in scrubbing tower with clean high temperature shift condensate liquid
Touching, 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,
High temperature shift condensation is wherein realized while flashing gas washing to strip, and ash of the coal gasified black water flash tank bottom containing lime-ash
Water enters gasification ash water system and continues with.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 wash flashed vapour, thoroughly remove the grey solid impurity particle in flashed vapour, it is stifled to solve entrainment lime-ash in flashed vapour
The problem of filling in equipment, and flash gas washing and realized in the same device with high temperature shift condensation stripping, save transformation condensate liquid
Stripped vapor consumption, the ammonia content for reducing 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 0.7~1.1MPa, in the flash distillation gas wash tower
Temperature be 165~184 DEG C, the condensate liquid after the flashed vapour wash tower bottoms are heated and strip except ammonia send gasification system to use
Make moisturizing.
Wherein, the clean flashed vapour after washing first gives up through flashed vapour and 3 byproduct steam of pot and recycles the partial heat of flashed vapour,
The after-heat of flashed vapour is recycled through afterheat heat exchanger 4 again, flashed vapour passes through two-stage heat recovery, and the heat of carrying is rationally divided
Grade sufficiently recycles;The flashed vapour gives up low-pressure steam of the pot to 0.4~0.6MPa of by-product, and the low-pressure steam is sent into
Low-pressure steam pipe network is used for low-voltage customer, has been broken previous flashed vapour heat and has been only used for preheating gasification ash water, transformation condensate liquid
Steam stripped limitation;The afterheat heat exchanger further recycles the heat of the useless pot outlet flashed vapour of flashed vapour to preheat cryogenic media
Amount.
Flash steam after recycling heat successively passes through final cooler 5 and separator 6, and the final cooler is to cooling
Flashed vapour, the separator is for separating the liquid carried secretly in flashed vapour, to meet the requirement of flash gas compression machine suction parameter, point
It is compressed to certain pressure from the flash distillation pneumatic transmission flash gas compression machine 7 at the top of device, and send process gas system, meets downstream recovery H2、
The process requirement of the available gas such as CO makes CO, H in flashed vapour2Equal active principles are recycled, separator bottom it is cold
Containing the CO largely dissolved in lime set2、NH3、H2S is focused on together with the acid water of subsequent workshop section.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
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, by clean high temperature shift condensate liquid in flash distillation gas wash tower to coal gasified black water flashed vapour into
Row washing, wherein realizing high temperature shift condensation stripping while flashing gas washing;Clean flashed vapour after washing is first through dodging
The useless pot byproduct steam of steam and the partial heat for recycling flashed vapour, then the after-heat through afterheat heat exchanger recycling flashed vapour;It returns
Flash steam after the receiving heat successively flash distillation pneumatic transmission after final cooler is cooling and separator gas-liquid separation, at the top of separator
Flash gas compression machine is compressed to certain pressure, and send process gas system, the condensate liquid centralized processing of separator bottom.
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 lower part, and high temperature shift is cold
Lime set is entered in tower by overhead-liquid distributor, and flashed vapour countercurrently connects in scrubbing tower with clean high temperature shift condensate liquid
Touching, 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 it strips and removes ammonia.
3. coal gasified black water flashed vapour according to claim 2 utilizes technique, it is characterised in that: the flash distillation gas wash tower
Operation operating condition are as follows: it is described flash distillation gas wash tower in pressure be 0.7~1.1MPa, it is described flash distillation gas wash tower in temperature be
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 strips 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
Useless low-pressure steam of the pot to 0.4~0.6MPa of by-product of flashed vapour is stated, the low-pressure steam is sent into low-pressure steam pipe network, for low pressure
User uses;The afterheat heat exchanger further recycles the heat of the useless pot outlet flashed vapour of flashed vapour to preheat cryogenic media.
6. coal gasified black water flashed vapour according to claim 5 utilizes technique, it is characterised in that: the separator is for dividing
Contained in the condensate liquid of separator bottom big from the liquid carried secretly in flashed vapour with meeting the requirement of flash gas compression machine suction parameter
Measure the CO of dissolution2、NH3、H2S is focused on together with the acid water of subsequent 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, meet H in downstream recovery flashed vapour2, CO available gas process requirement.
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Families Citing this family (5)
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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 |
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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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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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 |
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