CN104529040B - A kind of handling process method of fixed bed crushed coal pressure gasifying sewage - Google Patents
A kind of handling process method of fixed bed crushed coal pressure gasifying sewage Download PDFInfo
- Publication number
- CN104529040B CN104529040B CN201510033655.3A CN201510033655A CN104529040B CN 104529040 B CN104529040 B CN 104529040B CN 201510033655 A CN201510033655 A CN 201510033655A CN 104529040 B CN104529040 B CN 104529040B
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- Prior art keywords
- sewage
- fixed bed
- crushed coal
- coal pressure
- gasifying
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Classifications
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/04—Cyclic processes, e.g. alternate blast and run
-
- 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
- C02F1/048—Purification of waste water by evaporation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J2300/00—Details of gasification processes
- C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
- C10J2300/0953—Gasifying agents
Abstract
The invention belongs to sewage treatment area, there is provided a kind of handling process method of fixed bed crushed coal pressure gasifying sewage.The handling process method of the fixed bed crushed coal pressure gasifying sewage is referred to：Fixed bed crushed coal pressure gasifying sewage after pretreatment enters sewage pressurization and preheating unit, in sewage pressurization and preheating unit, the pressurized pump of fixed bed crushed coal pressure gasifying sewage is sent into gas preheater after being pressurized to predetermined pressure and is preheated, fixed bed crushed coal pressure gasifying sewage after preheating enters sewage vaporization and crosses hot cell, vaporize in sewage and cross in hot cell, fixed bed crushed coal pressure gasifying sewage is vaporizated into saturation dirt steam, and saturation dirt steam is further heated as overheated dirty steam, overheated dirty steam replaces traditional gasifying agent to be admitted to gasification furnace as new gasifying agent.Technical scheme is solved the problems, such as in prior art to lacking in ability that the sewage produced in coal gasification production process is processed.
Description
Technical field
The present invention relates to sewage treatment area, in particular to a kind of process of fixed bed crushed coal pressure gasifying sewage
Process.
Background technology
Present pressurization static bed coal gasification plant, generally using biochemical method gas treatment sewage.Due to coal gas
The sewage quantity in chemical plant is big, and the water quality of sewage with feed coal characteristic (coal be elementary composition by C, H, O, N, S etc., and
The polluter of N, S element containing higher proportion in feed coal) and coal gasification production operation condition change greatly, coal gasification
The sewage that factory produces has stronger destructive power to environment, and therefore, sewage disposal link is pressurization static bed coal gasification plant
Weak link in production procedure, also because of the delayed development restriction use of Coal Gasification Technology of sewage disposal technology.
Content of the invention
Present invention is primarily targeted at a kind of handling process method of fixed bed crushed coal pressure gasifying sewage is provided, to solve
The problem for lacking in ability for certainly sewage produced in coal gasification production process being processed in prior art.
To achieve these goals, according to an aspect of the invention, there is provided a kind of fixed bed crushed coal pressure gasifying is dirty
The handling process method of water, fixed bed crushed coal pressure gasifying sewage after pretreatment enter sewage pressurization and preheating unit,
In sewage pressurization and preheating unit, it is pre- that the pressurized pump of fixed bed crushed coal pressure gasifying sewage sends into coal gas after being pressurized to predetermined pressure
Hot device is preheated, and the fixed bed crushed coal pressure gasifying sewage after preheating enters sewage vaporization and crosses hot cell, vaporizes in sewage
And cross in hot cell, fixed bed crushed coal pressure gasifying sewage is vaporizated into saturation dirt steam, and saturation dirt steam is further added
Heat is overheated dirty steam, and overheated dirty steam replaces traditional gasifying agent to be admitted to gasification furnace as new gasifying agent.
Further, fixed bed crushed coal pressure gasifying sewage is the coal gasification wastewater that crushed coal pressure gasifying system is produced.
Further, coal gas moisture is included to the processing mode of the pretreatment that fixed bed crushed coal pressure gasifying sewage is carried out
Reclaim from, phenol, the combination of a kind of processing mode in recovery ammonia or arbitrarily several processing modes.
Further, predetermined pressure is more than or equal to 3.0MPa, and is less than or equal to 6.8MPa.
Further, needed for fixed bed crushed coal pressure gasifying sewage is preheated in sewage pressurization and preheating unit
Thermal source is the heating gas that pressurization static bed crushed coal pressure gasifying system is produced, wherein, fixed bed crushed coal pressure gasifying sewage pre-
Hot temperature is more than or equal to 100 DEG C, less than or equal to 260 DEG C.
Further, fixed bed crushed coal pressure gasifying sewage sewage vaporize and cross vaporize in hot cell and be superheated to overheated
Dirty steam institute calorific requirement is provided by the superheated steam that plant pipe network is supplied, and the superheated steam is vaporized in sewage and crossed in hot cell
The condensed fluid or steam formed after heat exchange is back to the condensed fluid or steam pipe system of factory.
Further, the pressure of new gasifying agent is more than or equal to 2.8MPa, less than or equal to 6.5MPa, and the temperature of new gasifying agent
It is more than or equal to 230 DEG C, less than or equal to 330 DEG C.
Further, vaporize in sewage and cross in hot cell, unboiled saliferous in fixed bed crushed coal pressure gasifying sewage
Sewage is sent to factory's incinerator and carries out burning disposal.
The sewage produced in pressurization static bed broken coal gasification system is converted into pressurization static bed broken coal gas by the inventive method
Indispensable gasifying agent during change, has not only carried out efficient process to sewage, and process the process of sewage simple, without dirt
Dye, and part live steam (traditional gasifying agent) is instead of, with obvious economic benefit.The technical side of the application present invention
Case, is pressurizeed by sewage and preheating unit and sewage vaporization and crosses the hot cell dirt that produces pressurization static bed broken coal gasification system
Water is processed and recycles as new gasifying agent, makes the sewage produced in coal gasification course be converted into overheated dirty steam, mistake
Hot dirt steam is transported to the gasification furnace in crushed coal pressure gasifying system and is carried out producing coal gas product, now, mistake together with broken coal
Hot dirt steam is the substitute (new gasifying agent) for replacing the traditional gasifying agent in traditional broken coal gasification production technique.Apply this
The sewage produced in broken coal gasification is converted into indispensable gasifying agent in broken coal gasification (i.e. by bright technical scheme
Vapor), efficient process are carried out to coal gasification wastewater not only so that sewage disposal process is simple, cleanliness without any pollution, Er Qieti
Sewage treatment capacity during high broken coal gasification process, and after process, the vapor of gained instead of traditional coal gas
Traditional gasifying agent in chemical industry skill, so that coal gasification wastewater is effectively utilized, with obvious economic benefit.
Description of the drawings
The Figure of description for constituting the part of the application is used for providing a further understanding of the present invention, and the present invention shows
Meaning property embodiment and its illustrated for explaining the present invention, does not constitute inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 shows the stream of the embodiment of the handling process method of the fixed bed crushed coal pressure gasifying sewage according to the present invention
Journey schematic diagram.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combine.Below with reference to the accompanying drawings and in conjunction with the embodiments describing the present invention in detail.
As shown in figure 1, embodiments in accordance with the present invention, the fixed bed crushed coal pressure gasifying system includes sewage pressurization and pre-
Hot cell and sewage are vaporized and cross hot cell, and as shown in dotted line frame in Fig. 1, sewage pressurization and preheating unit and sewage are vaporized and mistake
Hot cell constitutes what the fixed bed crushed coal pressure gasifying sewage to generation in crushed coal pressure gasifying system of the present invention was processed
Sewage disposal module.The sewage inlet of sewage pressurization and preheating unit and the coal gasification wastewater water outlet of crushed coal pressure gasifying system
Mouthful connection, preheated after coal gasification wastewater (i.e. fixed bed crushed coal pressure gasifying sewage) pressurizeed by sewage and preheating unit goes out
The mouth of a river is discharged, and vaporizes subsequently into sewage and cross in hot cell, wherein, and sewage is vaporized and crossed the venthole of hot cell and added with broken coal
The air intake connection of pressure gasification system.
Application technical scheme, the coal gasification wastewater that fixed bed crushed coal pressure gasifying system is produced enter sewage and add
In pressure and preheating unit.Sewage pressurize and preheating unit in, coal gasification wastewater through pump be pressurized to predetermined pressure (3.0MPa～
6.8MPa), and with the heating gas from crushed coal pressure gasifying system exchanged heat (coal gasification wastewater is preheated), hot coal
Gas cooling after finishing with coal gasification wastewater heat exchange for the relatively low cooled coal gas of temperature and returns to the cold of crushed coal pressure gasifying system
But it is further cooled in equipment.The temperature of the coal gasification wastewater after preheating is 100～260 DEG C.Coal gasification after preheated is dirty
Water enters sewage vaporization and crosses hot cell, and in the unit, coal gasification wastewater is added by the superheated steam from factory steam pipe network
Heat, vaporize and continue overheated, so as to generate overheated dirty steam (temperature of overheated dirty steam between 230 DEG C to 330 DEG C,
Its pressure is between 2.8MPa to the 6.5MPa), subsequently, superheated steam sewage vaporize and cross in hot cell with coal gasification wastewater
The condensed fluid or low-pressure steam formed after heat exchange is back in plant pipe network and is further employed.Overheated dirty steam is used as new gasification
Agent replaces traditional gasifying agent to be admitted in gasification furnace together with broken coal to be carried out crushed coal pressure gasifying technique and produces coal gas product.?
In gasification furnace, Organic substance is at high temperature and combustion decomposition is carbon dioxide, carbon monoxide, water, nitrogen etc. in the presence of oxygen
Small-molecule substance.
Specifically, by taking the sewage produced during the fixed bed crushed coal pressure gasifying of certain factory as an example, so that the present invention to be described
Specific embodiment.Pretreatment of the sewage produced in coal gasification course through processing modes such as gas liquor separation, phenol, recovery ammonias
Afterwards, as shown in table 1, its coal gasifying process flow process is as shown in figure 1, the pressurized pump of coal gasification wastewater adds its water quality correlation analysiss data
After being pressed onto 4.8MPa, it is admitted in preheater and is preheated, in preheater, coal gasification wastewater is preheating to 180 DEG C, Ran Houjin
Enter drum.Coal gasification wastewater further processed process in drum produces saturation dirt steam, and then, saturation dirt steam was entered
It is 300 DEG C that the superheated steam of hot device the plant pipe network for being come in the superheater is heated and produces temperature, and pressure is 4.3MPa's
Overheated dirty steam (or dirty steam of pressure in being referred to as), finally, overheated dirty steam is entered gasification furnace as gasifying agent and is produced together with coal
Coal gas product.Wherein, the process on gasifier operation without impact.
Table 1
Additionally, as shown in figure 1, vaporizing in sewage and crossing in hot cell, coal gasification wastewater forms the dirty steaming of saturation heated
During vapour, the excessively overheated dirty steam of thermosetting, steam is further processed, a small amount of high boiling point contained in steam is contained
Salt sewage is separated, and is transported in incinerator and is carried out burning disposal, so as to the salt dirt in coal gasification wastewater is cleaned
Process, prevent salt pollution environment.
During pretreatment is carried out to gas sewage, such as coal, gas-water separation, phenol are reclaimed, the process side such as recovery ammonia
The combination of a kind of processing mode or several processing modes in formula can carry out pretreatment to coal gasification wastewater.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect：
The sewage that coal gasification is produced is converted into indispensable gas in coal gasification course by application technical scheme
Agent (i.e. water vapour), has not only carried out efficient process to coal gasification wastewater so that the processing procedure of coal gasification wastewater becomes
Simply, cleanliness without any pollution, so that improve the sewage treatment capacity in coal gasification machining process, and gained after processing
Vapor instead of the traditional gasifying agent in coal gasification technical process so that coal gasification wastewater is utilized effectively, with obvious
Economic benefit.
The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to, for the skill of this area
For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair
Change, equivalent, improvement etc., should be included within the scope of the present invention.
Claims (7)
1. a kind of handling process method of fixed bed crushed coal pressure gasifying sewage, it is characterised in that：Fixed bed after pretreatment
Crushed coal pressure gasifying sewage enters sewage pressurization and preheating unit, in sewage pressurization and preheating unit, the fixed bed
The pressurized pump of crushed coal pressure gasifying sewage is sent into gas preheater after being pressurized to predetermined pressure and is preheated, described solid after preheating
Fixed bed crushed coal pressure gasifying sewage enters sewage vaporization and crosses hot cell, vaporizes in the sewage and crosses in hot cell, described solid
Fixed bed crushed coal pressure gasifying sewage is vaporizated into saturation dirt steam, and saturation dirt steam is further heated as overheated dirty steaming
Vapour, the overheated dirty steam replace traditional gasifying agent to be admitted to gasification furnace as new gasifying agent, wherein, to the fixed bed broken coal
The processing mode of the pretreatment that pressurized gasification sewage is carried out includes that gas liquor is separated, phenol is reclaimed, a kind of process side in recovery ammonia
Formula or the combination of arbitrarily several processing modes.
2. the handling process method of fixed bed crushed coal pressure gasifying sewage according to claim 1, it is characterised in that：Described
Fixed bed crushed coal pressure gasifying sewage is the coal gasification wastewater that crushed coal pressure gasifying system is produced.
3. the handling process method of fixed bed crushed coal pressure gasifying sewage according to claim 1, it is characterised in that：Described
Predetermined pressure is more than or equal to 3.0MPa, and is less than or equal to 6.8MPa.
4. the handling process method of fixed bed crushed coal pressure gasifying sewage according to claim 1, it is characterised in that：Described
Fixed bed crushed coal pressure gasifying sewage the sewage pressurize and preheating unit in preheated needed for thermal source be fixed bed broken
The heating gas that coal pressure gasification system is produced, wherein, the preheating temperature of the fixed bed crushed coal pressure gasifying sewage is more than or equal to
100 DEG C, less than or equal to 260 DEG C.
5. the handling process method of fixed bed crushed coal pressure gasifying sewage according to claim 1, it is characterised in that：Described
Fixed bed crushed coal pressure gasifying sewage is vaporized and is crossed in the sewage and vaporizes in hot cell and be superheated to the overheated dirty steam institute
Calorific requirement is provided by the superheated steam that factory steam pipe network is supplied, and the superheated steam is vaporized in the sewage and crossed in hot cell
The condensed fluid or steam formed after heat exchange is back to the condensed fluid or steam pipe system of factory.
6. the handling process method of fixed bed crushed coal pressure gasifying sewage according to claim 1, it is characterised in that：Described
The pressure of new gasifying agent is more than or equal to 2.8MPa, and less than or equal to 6.5MPa, and the temperature of the new gasifying agent is more than or equal to 230
DEG C, less than or equal to 330 DEG C.
7. the handling process method of fixed bed crushed coal pressure gasifying sewage according to claim 1, it is characterised in that：Institute
State sewage vaporization and cross in hot cell, unboiled saline sewage is sent to factory in the fixed bed crushed coal pressure gasifying sewage
Incinerator carries out burning disposal.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510033655.3A CN104529040B (en) | 2015-01-22 | 2015-01-22 | A kind of handling process method of fixed bed crushed coal pressure gasifying sewage |
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| CN201510033655.3A CN104529040B (en) | 2015-01-22 | 2015-01-22 | A kind of handling process method of fixed bed crushed coal pressure gasifying sewage |
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| CN104529040A CN104529040A (en) | 2015-04-22 |
| CN104529040B true CN104529040B (en) | 2017-03-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105462617A (en) * | 2015-12-01 | 2016-04-06 | 大唐国际化工技术研究院有限公司 | Equipment and method for preparing superheated steam required by moving bed gasification furnace |
| CN107573970A (en) * | 2017-10-13 | 2018-01-12 | 中石化炼化工程（集团）股份有限公司 | Heavy slurry and the method for oil-polluted water combined vaporizing |
| CN113526596B (en) * | 2020-04-14 | 2023-04-07 | 中科合成油工程有限公司 | Method for recycling sewage of pressurized fixed bed coal gasification process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757016A (en) * | 2012-07-20 | 2012-10-31 | 上海国际化建工程咨询公司 | Method and device for cogeneration of synthesis ammonia gas and liquefied natural gas prepared through pressure gasification of crushed coal in fixed bed |
| CN103922549A (en) * | 2014-05-06 | 2014-07-16 | 天脊煤化工集团股份有限公司 | Coal gasification wastewater treating and recycling method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5419250B2 (en) * | 2007-01-19 | 2014-02-19 | 月島機械株式会社 | Gasification method and gasification equipment for organic matter |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102757016A (en) * | 2012-07-20 | 2012-10-31 | 上海国际化建工程咨询公司 | Method and device for cogeneration of synthesis ammonia gas and liquefied natural gas prepared through pressure gasification of crushed coal in fixed bed |
| CN103922549A (en) * | 2014-05-06 | 2014-07-16 | 天脊煤化工集团股份有限公司 | Coal gasification wastewater treating and recycling method and device |
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