CN105776603A - Black water processing method and system in gasification reaction technology - Google Patents
Black water processing method and system in gasification reaction technology Download PDFInfo
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- CN105776603A CN105776603A CN201410806885.4A CN201410806885A CN105776603A CN 105776603 A CN105776603 A CN 105776603A CN 201410806885 A CN201410806885 A CN 201410806885A CN 105776603 A CN105776603 A CN 105776603A
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Abstract
The invention discloses a black water processing method and system in gasification reaction technology. According to the method, black water generated in the gasification reaction technology is subjected to micro-nano level filtration, and after filtration the reuse water is applied to the gasification reaction technology again. The black water processing system comprises a filter, which is provided with a water inlet and a water outlet; a micro-nano level filter membrane is arranged in the filter; the water inlet of the filter is communicated with the black water outlet of a gasification reactor and/or a washing tower; black water enters the filter from the water inlet, is filtered by the micro-nano level filter membrane, and is discharged from the water outlet after filtration, and the filtered reuse water can be used in the gasification reaction technology again. According to the method, a micro-nano level filter membrane is used in black water treatment, the suspensions in black water can be filtered, the processed black water can reach the reuse standards; the reusing of black water is realized; the obstruction of pipelines is prominently inhibited, and at the same time, the compression power consumption of black water cyclic utilization is reduced.
Description
Technical field
The present invention relates to the usage on black water field in gasification reaction technique, in particular it relates to a kind of usage on black water method in gasification reaction technique and realize the system of the method.
Background technology
The gasification reaction technique of carbonaceous material is comparatively important in chemical field, and typically coal gasification is Chemical Industry " tap ", it is ensured that the vital task that it is stable, Effec-tive Function is Coal Chemical Industry process.Coal water slurry gasification is widely used at home due to stability high.Wherein, the gasification reaction techniques such as coal water slurry gasification can produce a large amount of Heisui River, for instance in the gasification reaction process in gasification reactor, all can produce Heisui River when forming gas is washed by scrubbing tower, and need these Heisui River is processed.Prior art processes gasification Heisui River mainly through multistage flash evaporation and flocculating sedimentation, so cause technological process long, and owing to Heisui River solid content and hardness are all higher, cause that the various problems such as abrasion perforation, fouling and clogging occurs in subsequent pipeline, bring great difficulty to the stable operation of device.It addition, the setting according to subsequent treatment operation, pressure is that 6.59MPa hot water first reduces to normal pressure, and supercharging reuse again after treatment expends a large amount of work done during compression.
Summary of the invention
It is an object of the present invention to provide a kind of usage on black water method in gasification reaction technique, processing method can effectively realize the reuse in Heisui River, and reduces abrasion and the power consumption of equipment.
It is a further object to provide the black water treatment system in a kind of gasification reaction technique, this black water treatment system is capable of usage on black water method provided by the invention.
To achieve these goals, according to an aspect of the present invention, thering is provided a kind of usage on black water method in gasification reaction technique, the method includes carrying out the Heisui River of the discharge in gasification reaction technique micro/nano level filtration, and the recycle-water after filtering is used for described gasification reaction technique again.
Preferably, the filtering accuracy designing the filtration of described micro/nano level is 0.6-1 μm, and filtration pressure difference is 0.2-1Mpa.
Preferably, before filtration, Heisui River is depressurized in advance 0.2-6.6Mpa.
Preferably, described recycle-water is used for the synthesis gas washing technique in described gasification reaction technique.
Preferably, the dense water of filtered is carried out flocculating sedimentation process.
Preferably, before described micro-nano filters, Heisui River is carried out solid-liquid separation, the filtering accuracy that the precision of this solid-liquid separation filters lower than described micro/nano level.
According to a further aspect in the invention, black water treatment system in a kind of gasification reaction technique is provided, this gasification reaction technique uses gasification reactor and the scrubbing tower connected with this gasification reactor, described black water treatment system includes the filter being provided with micro/nano level filter membrane, the Heisui River wherein discharged from described gasification reactor and/or described scrubbing tower can be filtered into recycle-water by the described micro/nano level filter membrane of described filter, and this recycle-water can be used for described gasification reaction technique by described black water treatment system again.
Preferably, the fenestra aperture of described micro/nano level filter membrane is 0.6-1 μm.
Preferably, described fenestra both sides pressure reduction is 0.2-1Mpa.
Preferably, described micro/nano level filter membrane is ceramic membrane.
Preferably, the upstream of described filter is connected to the air relief valve for being reduced pressure in Heisui River.
Preferably, the upstream of described filter is connected to the separation accuracy solid-liquid separator lower than the filtering accuracy of described filter.
Preferably, described solid-liquid separator is solid-liquid cyclone separator.
Preferably, the described outlet of described filter is for being fed to the recycle-water after filtration in described scrubbing tower.
Preferably, described filter includes the outlet discharging described recycle-water, and this outlet is connected with described scrubbing tower by blender, and this blender is for, before described recycle-water is fed to described scrubbing tower, mixing this recycle-water with supplementary water.
Preferably, described filter also includes the discharge outlet discharging the dense water of filtered, and described black water treatment system also includes the Sedimentation tank connected with this discharge outlet, and this Sedimentation tank is for carrying out flocculating sedimentation by described dense water.
Pass through technique scheme, micro/nano level filter membrane is applied in usage on black water, it is possible to the float in Heisui River is filled into reuse standard, thus realizing the reuse in Heisui River, the blocking of pipeline can be significantly inhibited on the one hand, decrease the compression power consumption that Heisui River recycles on the other hand.
Other features and advantages of the present invention will be described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of description, is used for explaining the present invention, but is not intended that limitation of the present invention together with detailed description below.In the accompanying drawings:
Fig. 1 is the theory diagram of the black water treatment system that the preferred embodiment for the present invention provides.
Description of reference numerals
1 filter 2 blender
3 gasification reactor 4 scrubbing towers
5 Sedimentation tank 6 air relief valve
7 solid-liquid separator 8 compressors
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that detailed description of the invention described herein is merely to illustrate and explains the present invention, it is not limited to the present invention.
In the present invention, when not making contrary explanation, the noun of locality of use defines with flowing to of Heisui River in black water treatment system as " upstream and downstream " is, specifically can refer to the direction of arrow in Fig. 1.
As it is shown in figure 1, the present invention provides a kind of usage on black water method in gasification reaction technique and realizes the black water treatment system of the method.This usage on black water method, system can be used in the gasifying process to such as water-coal-slurry, and further for the gasification of other carbonaceous materials, the present invention uses equally, and the mode of texturing for this type of application all should drop in protection scope of the present invention.
Wherein, gasification reaction technique provided by the invention employs gasification reactor 3 and the scrubbing tower 4 connected with this gasification reactor 3, and wherein scrubbing tower 4 can also provide chilled water for gasification reactor except washing except the synthesis gas of gasification reactor 3.Wherein, gasification reactor 3 can produce Heisui River when the carbonaceous materials such as water-coal-slurry are carried out gasification reaction, scrubbing tower 4 can produce Heisui River equally when washing synthesis gas, in order to realize the purpose of the present invention, first as the design of the present invention, usage on black water method provided by the invention includes carrying out the Heisui River of the discharge in gasification reaction technique micro/nano level filtration, and the recycle-water after filtering is used for gasification reaction technique again.This is owing to the suspension content in the Heisui River after micro/nano level filters disclosure satisfy that reuse standard, namely less than 100ppm.It can be appreciated that, " micro/nano level filtration " mentioned by the present invention refers to filtering accuracy filtration in the scope of 1nm-1 μm, so that the filtration in enough Heisui River can meet reuse standard.The defecator being wherein capable of this filtering accuracy is micro/nano level filter membrane, common inorganic filter film can be ceramic membrane or metal film, in order to the high temperature of adaptability chemical field, highly corrosive environments, it is preferable that the filter membrane that the present invention uses is ceramic membrane.It addition, the gasification reaction technique that can use recycle-water related in the present invention includes but not limited to the washing to synthesis gas and provides chilled water etc. for gasification reactor.
Correspondingly, in black water treatment system provided by the invention, in order to realize said method, black water treatment system includes the filter 1 with water inlet and outlet, this filter 1 is provided with the micro/nano level filter membrane between water inlet and outlet, the Heisui River wherein discharged from gasification reactor 3 and/or scrubbing tower 4 can be filtered into recycle-water by the micro/nano level filter membrane of filter 1, and black water treatment system can by this to be used for gasification reaction technique by this recycle-water again, for instance sends the washing for synthesis gas in scrubbing tower 4 back to.Specifically, the water inlet of filter 1 can with the Heisui River outlet of gasification reactor 3 and/or scrubbing tower 4, so that Heisui River is entered filter 1 by water inlet and is discharged by outlet after the filtration through micro/nano level filter membrane, with again for gasification reaction technique.
Consider the standard of Heisui River reuse and filter cost, preferably, the filtering accuracy that design micro/nano level filters is 0.6-1 μm, it is micro/nano level filter membrane that filter 1 selects fenestra aperture to be 0.6-1 μm so that Heisui River to be filtered, and so that filter membrane normal operation reaches good filter efficiency, it is also possible to design filtration pressure difference is 0.2-1Mpa, namely, making fenestra both sides pressure reduction is 0.2-1Mpa, so that the filter effect in Heisui River is better.In other embodiments, the filter membrane of other filtering accuracies can also be selected according to different reuse standards, and coordinate corresponding filtration pressure difference to be capable of the purpose of the present invention equally, also should drop in protection scope of the present invention for this type of deformation.
The service life of efficiency and micro/nano level filter membrane in order to promote micro/nano level filtration, it is preferable that before described micro-nano filters, Heisui River is carried out solid-liquid separation, the filtering accuracy that the precision of this solid-liquid separation filters lower than described micro/nano level.Namely, it is possible to before Heisui River is carried out micro/nano level filtration, in advance it is carried out coarse filtration, the solid suspension bigger to isolate particle diameter in Heisui River.Such as can filter out the particle diameter solid suspension more than 20 microns.Specifically, the upstream of filter 1 can be connected to the separation accuracy solid-liquid separator 7 lower than the filtering accuracy of filter 1.Solid-liquid cyclone separator such as can be used to perform solid-liquid separation operation, that is, the fine slag that to be previously isolated from out in Heisui River particle diameter bigger for eddy flow centrifugal force is utilized, thus ensureing the efficiency when micro/nano level filters, and reducing the probability that micro/nano level filter membrane is blocked or damages, practicality is higher.In other embodiments, it is also possible to the filtration members using the filtering accuracies such as filter screen relatively low carries out this solid-liquid separation operation, also should drop in protection scope of the present invention for this type of deformation.
Further, since relatively big from the Heisui River pressure of gasification reactor 3 and/or scrubbing tower 4 discharge, in order to avoid to the damage of filter 1 and the service life promoting filter membrane, it is preferable that before micro/nano level filters, Heisui River is depressurized in advance 0.2-6.6Mpa.In order to realize this purpose, in black water treatment system provided by the invention, the upstream of filter 1 is connected to the air relief valve 6 for being reduced pressure in Heisui River.The decompression to Heisui River can be realized by this air relief valve 6, it is more preferred to, this air relief valve 6 may be located at the upstream of solid-liquid separator 7, solid-liquid separator 7 to be protected simultaneously.
In usage on black water method provided by the invention, it is preferable that recycle-water is used for the synthesis gas washing technique in gasification reaction technique.Therefore, it is possible to realize being used for washing synthesis gas by recycle-water, it is effectively improved the value of usage on black water.In other embodiments, recycle-water can be also used in other techniques in gasifying process, for instance as chilled water, this present invention is not limited.In order to be preferably applied to washing process, it is preferable that be used for synthesis gas washing technique with supplementary water after being mixed by recycle-water.That is, outlet is connected with scrubbing tower 4 by blender 2, and this blender 2 is for, before recycle-water is fed to scrubbing tower 4, mixing this recycle-water with supplementary water.Supplementary water therein may include but be not limited to desalted water and condensed water.Compressor 8 wherein can also be set between blender 2 and scrubbing tower 4, mixed recycle-water is carried out supercharging thus meeting the use of scrubbing tower.
It addition, in order to avoid the pollution to environment, the dense water after filtered is carried out flocculating sedimentation process.That is, filter 1 also includes the discharge outlet of the dense water of discharge filtered, and black water treatment system also includes the Sedimentation tank 5 connected with this discharge outlet, and this Sedimentation tank 5 is for carrying out flocculating sedimentation by this dense water.Flocculating sedimentation is these known usage on black water techniques of those skilled in the art, does not do at this and too much repeats.
Wherein, the producing cause of dense water is owing to the hydrone in Heisui River and the less float of particle diameter have been passed through filter membrane and become recycle-water, then concentrating containing the oarse-grained solution that can not pass through filter membrane and become dense water, this dense water is then discharged in Sedimentation tank 5 by discharge outlet and carries out flocculating sedimentation process.The i.e. both sides of outlet and discharge outlet respectively filter membrane.With " dense water ", wherein described in the present invention " recycle-water " is distinctive in that the content of float is different.
The advantage introducing usage on black water method provided by the invention, system by the examples below.
Embodiment 1
By temperature be 240 DEG C, pressure 6.5MPa, solid content be 1% gasification Heisui River be decompressed to 1MP after pass into ceramic membrane filter 1 and carry out the separation of solid-liquid, the fenestra aperture of ceramic membrane is 0.6 μm, filtration pressure difference 0.2MPa, after separated, in Heisui River, solid suspension content is down to 93ppm, reaches reuse standard.So, 5 × 10 are produced with year5Nm3The coal water slurry gasifying device of synthesis gas is example, will save at least 150 ten thousand kilowatt hour compression power consumptions.
Embodiment 2
By temperature be 240 DEG C, pressure 6.5MP, solid content be 1% gasification Heisui River first pass into solid-liquid cyclonic separation, the solid suspension that more than 80% particle diameter is bigger is previously isolated from out system, the overflowing liquid of solid-liquid cyclone separator passes into purpose ceramic-film filter again and separates further, 0.6 micron of the fenestra aperture of ceramic membrane, filtration pressure difference 0.2MP, after purpose ceramic-film filter separates, in Heisui River, solid suspension content is down to 93ppm, reaches reuse standard.5 × 10 are produced with year5Nm3The coal water slurry gasifying device of synthesis gas is example, will save at least 650 ten thousand kilowatt hour work done during compressions.
To sum up, usage on black water method provided by the invention, system are by using micro/nano level filtering technique that Heisui River can be filtered into the recycle-water of reuse standard, especially after solid-liquid separation in advance processes, and usage on black water better effects if.Therefore, it is possible to realize the recycling in Heisui River, the blocking of pipeline can be significantly inhibited on the one hand, decrease the compression power consumption that Heisui River recycles on the other hand.Therefore, there is higher practicality and promotional value.
The preferred embodiment of the present invention is described in detail above in association with accompanying drawing; but; the present invention is not limited to the detail in above-mentioned embodiment; in the technology concept of the present invention; technical scheme can being carried out multiple simple variant, these simple variant belong to protection scope of the present invention.
It is further to note that, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, it is possible to be combined by any suitable mode, in order to avoid unnecessary repetition, various possible compound modes are no longer illustrated by the present invention separately.
Additionally, can also carry out combination in any between the various different embodiment of the present invention, as long as it is without prejudice to the thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (15)
1. the usage on black water method in a gasification reaction technique, it is characterised in that the method includes carrying out the Heisui River of the discharge in gasification reaction technique micro/nano level filtration, and the recycle-water after filtering is used for described gasification reaction technique again.
2. usage on black water method according to claim 1, it is characterised in that the filtering accuracy designing the filtration of described micro/nano level is 0.6-1 μm, and filtration pressure difference is 0.2-1Mpa.
3. usage on black water method according to claim 1 and 2, it is characterised in that before filtration, is depressurized to 0.2-6.6Mpa in advance by Heisui River.
4. usage on black water method according to claim 1, it is characterised in that described recycle-water is used for the synthesis gas washing technique in described gasification reaction technique.
5. the usage on black water method according to claim 1 or 4, it is characterised in that the dense water of filtered is carried out flocculating sedimentation process.
6. usage on black water method according to claim 1 and 2, it is characterised in that before described micro-nano filters, Heisui River is carried out solid-liquid separation, the filtering accuracy that the precision of this solid-liquid separation filters lower than described micro/nano level.
7. the black water treatment system in a gasification reaction technique, this gasification reaction technique uses gasification reactor (3) and the scrubbing tower (4) connected with this gasification reactor (3), it is characterized in that, described black water treatment system includes the filter (1) being provided with micro/nano level filter membrane, wherein can be filtered into recycle-water by the described micro/nano level filter membrane of described filter (1) from the Heisui River that described gasification reactor (3) and/or described scrubbing tower (4) are discharged, and this recycle-water can be used for described gasification reaction technique by described black water treatment system again.
8. black water treatment system according to claim 7, it is characterised in that the fenestra aperture of described micro/nano level filter membrane is 0.6-1 μm.
9. the black water treatment system according to claim 7 or 8, it is characterised in that described micro/nano level filter membrane is ceramic membrane.
10. the black water treatment system according to claim 7 or 8, it is characterised in that the upstream of described filter (1) is connected to the air relief valve (6) for being reduced pressure in Heisui River.
11. the black water treatment system according to claim 7 or 8, it is characterised in that the upstream of described filter (1) is connected to the separation accuracy solid-liquid separator (7) lower than the filtering accuracy of described filter (1).
12. black water treatment system according to claim 11, it is characterised in that described solid-liquid separator (7) is solid-liquid cyclone separator.
13. black water treatment system according to claim 7, it is characterised in that the described outlet of described filter (1) is for being fed to the recycle-water after filtration in described scrubbing tower (4).
14. black water treatment system according to claim 13, it is characterized in that, described filter includes the outlet discharging described recycle-water, this outlet is connected with described scrubbing tower (4) by blender (2), this blender (2) is for, before described recycle-water is fed to described scrubbing tower (4), mixing this recycle-water with supplementary water.
15. according to the black water treatment system described in claim 7 or 13 or 14, it is characterized in that, described filter (1) also includes the discharge outlet discharging the dense water of filtered, described black water treatment system also includes the Sedimentation tank (5) connected with this discharge outlet, and this Sedimentation tank (5) is for carrying out flocculating sedimentation by described dense water.
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| CN101298569A (en) * | 2008-06-26 | 2008-11-05 | 华东理工大学 | Gasification method of shock chilling type pulp or powder carbonaceous material |
| CN102039068A (en) * | 2009-10-20 | 2011-05-04 | 中国石油化工集团公司 | Processing method for coal gasification grey water |
| CN103124589A (en) * | 2010-05-25 | 2013-05-29 | 威立雅水处理技术北美公司 | Gasification process |
| CN103205284A (en) * | 2013-05-03 | 2013-07-17 | 袁源 | Coal gasification ash content treatment device and method |
| CN103435005A (en) * | 2013-09-06 | 2013-12-11 | 刘金成 | Washing treatment process for synthesis gas |
| CN103695041A (en) * | 2013-12-11 | 2014-04-02 | 华东理工大学 | Method for treating black water of coal gasification system |
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2014
- 2014-12-22 CN CN201410806885.4A patent/CN105776603A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101298569A (en) * | 2008-06-26 | 2008-11-05 | 华东理工大学 | Gasification method of shock chilling type pulp or powder carbonaceous material |
| CN102039068A (en) * | 2009-10-20 | 2011-05-04 | 中国石油化工集团公司 | Processing method for coal gasification grey water |
| CN103124589A (en) * | 2010-05-25 | 2013-05-29 | 威立雅水处理技术北美公司 | Gasification process |
| CN103205284A (en) * | 2013-05-03 | 2013-07-17 | 袁源 | Coal gasification ash content treatment device and method |
| CN103435005A (en) * | 2013-09-06 | 2013-12-11 | 刘金成 | Washing treatment process for synthesis gas |
| CN103695041A (en) * | 2013-12-11 | 2014-04-02 | 华东理工大学 | Method for treating black water of coal gasification system |
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Address after: No. 22, diazepam West Binhe Road, Dongcheng District, Beijing, Beijing Applicant after: CHINA ENERGY INVESTMENT Corp.,Ltd. Applicant after: NATIONAL INSTITUTE OF CLEAN-AND-LOW-CARBON ENERGY Address before: 100011 Shenhua building, 22, Ping Men Road, West Binhe Road, Dongcheng District, Beijing Applicant before: SHENHUA GROUP Corp.,Ltd. Applicant before: NATIONAL INSTITUTE OF CLEAN-AND-LOW-CARBON ENERGY |
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