CN102408904A - Process for treating tannery dimethylformamide (DMF) distillation residues through carbonization technology - Google Patents
Process for treating tannery dimethylformamide (DMF) distillation residues through carbonization technology Download PDFInfo
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- CN102408904A CN102408904A CN2011103092389A CN201110309238A CN102408904A CN 102408904 A CN102408904 A CN 102408904A CN 2011103092389 A CN2011103092389 A CN 2011103092389A CN 201110309238 A CN201110309238 A CN 201110309238A CN 102408904 A CN102408904 A CN 102408904A
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Abstract
The invention discloses a process for treating tannery dimethylformamide (DMF) distillation residues through a carbonization technology, which comprises the following steps: preheating DMF distillation residues with a preheating device; transferring the preheated DMF distillation residues to a carbonization furnace through a feed system; raising the temperature of the carbonization furnace to 150-800 DEG C, and carrying out oxygen-lack and oxygen-free carbonization; collecting the mixed gas generated in the carbonization process, cooling with a condenser, and then separating into an oil-water mixture and a noncondensable gas; recovering the flue gas generated by the carbonization furnace through a flue gas purification system, and re-discharging; using an oil-water separator to separate the oil-water mixture into fuel oil and water; and after the carbonization procedure is finished, using a residue cooling system to cool the remaining solid residues to 50 DEG C or below, thus obtaining charred carbon. Thus, the process can be used for treating pollution and recovering precious resources, thereby realizing the cyclic utilization of the resources.
Description
Technical field
The present invention relates to a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue, belong to the environment-friendly engineering technology.
Background technology
In the synthetic leather industry, DMF (N) distillation recovery system has critical role.This system has not only solved the synthetic leather wet processing and has contained the problem of environmental pollution that DMF waste water causes because of discharging, can give enterprise's considerable economic benefit through reclaiming highly purified DMF (purity>99.5%) again.Environmental problems such as the waste water that DMF distillation recovery system itself is produced in using operating process, waste residue but do not obtain enough understandings of environmental administration and attention for a long time but from another point of view.
In DMF distillation recovery system, the generation of distillation residue is the system's by product that has greater environmental impacts with discharging.Through analysis to whole distillation removal process; The generation that can find out residue at first is because in the wet processing water washing process; Except DMF replaced water-soluble; Also have other small amount of impurities such as scurf, resin, weighting material (lignocellulose, lime carbonate etc.) also to be brought in the water, and to form hydrometallurgic recovery waste water together.In synthetic leather industry now, this recovery waste water is not generally carried out pre-treatment (reduce suspended substance, remove impurity), directly get into recovery and processing system, and, make the impurity in the waste water form the residue emission treatment through still-process.In DMF distillation recovery system; Residue is to be discharged by the vaporizer and the rectifying tower generation of system with the dense thick raffinate form of height; Detailed process is that system enters raffinate in the raffinate tower through tail pump; Part capable of using is failed back in the vaporizer again in the raffinate simultaneously, forms cycling and reutilization, to improve the DMF recovery.In actual moving process, when the raffinate amount in the raffinate tower was accumulated to a certain degree, system must efflux it; Drain time viewing system workload decide with the water quality condition that reclaims water quality, generally at least 3～5 days, discharges once in 7～10 days at most; Each quantity discharged is about hundreds of kilograms; According to investigations, under the ordinary production situation, general synthetic leather enterprise can discharge 2～5 tons of distillation residue in every month.The dense thick liquid shape of the general black in color heat of distillation residue is effluxed by system, solidifies rapidly after the cooling, and shape such as pitch, appearance black is inner yellow partially, and aromatic odour is not only sticking but also thick.In synthetic leather industry now, the handling problems of distillation residue still there is not good countermeasure, part enterprise adopts mixes the coal combustion mode and disposes residue; But find that in factual survey because residue is nonflammable, viscosity is strong; If mishandling, life-time service may cause damage to boiler; Also have part enterprise that residue is sneaked in the cinder and transport outward, even directly arbitrarily discharging.Because residue belongs to Hazardous wastes, enterprise's disposable will cause very big harm to environment.
Summary of the invention
The object of the present invention is to provide a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue, pollute, reclaim precious resources, realize resource circulation utilization to administer.
In order to achieve the above object, technical scheme of the present invention is:
A kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue the steps include:
The first step is carried out preheating through preheating unit to the DMF distillation residue, to improve the flowability of DMF distillation residue;
In second step, deliver to gas retort through the DMF distillation residue of feed system after with preheating;
The 3rd step rose to 150 ℃～800 ℃ with the gas retort temperature, carried out oxygen debt and the anaerobic destructive distillation;
The 4th step collected the mixed gas that produces in the retort process, through being separated into oil-water mixture and can not coagulating combustion gas after the condensing surface cooling;
The flue gas that gas retort produces is that the organism in the DMF distillation residue under hot conditions scission reaction takes place and the high heating value combustible gas that produces, and it is reclaimed discharging again through flue gas purification system, and utilization helps to reduce process energy consumption;
In the 5th step, use water-and-oil separator that oil-water mixture is separated into oil fuel and water;
The 6th step, after destructive distillation finishes, use cold slag system will remain solid slag and be cooled to below 50 ℃, obtain burnt matter charcoal.
The said the first step, preheating unit utilize modes such as steam heating, electrically heated or fume afterheat heating that the DMF distillation residue are carried out preheating.
The said the first step, preheating temperature remain on atmospheric pressure state below 104 ℃, so that produce at the least possible inflammable mixture.
In said the 3rd step, in gas retort, feed Sweet natural gas and burn.
Said the 3rd step in retort process, for preventing to influence discharging because of the too fast residue caking of causing that heats up, should guarantee heat-up rate≤10 ℃/Min, can in the specified temp section, carry out the constant temperature destructive distillation of certain hour in case of necessity.
In said the 4th step, can not coagulate combustion gas and use through the fuel of burner combustion as gas retort.
In said the 4th step, the gas retort flue gas is produced water vapor through waste heat boiler earlier, reclaims fume afterheat, again flue gas is carried out purifying and dedusting through flue gas purification system afterwards.
In said the 5th step, isolated water can be used for replenishing the required water coolant of gas retort flue gas purification system dedusting.
After adopting such scheme; The present invention can become non-Hazardous substancess such as inflammable mixture, oil fuel and burnt matter charcoal through oxygen debt with the anaerobic retorting technique with DMF distillation residue Hazardous wastes; Non-secondary pollution; Solved direct burning and produced dioxin pollution and the high problem of processing cost, realized the recycling of resource utilization, turned waste into wealth.
Description of drawings
Fig. 1 is a concrete application example schema of the present invention;
Fig. 2 is DMF distillation residue preheating unit and feed system synoptic diagram.
Label declaration:
1 DMF distillation residue preheating can, 2 well heaters
3 steam-ins, 4 vapour outlets
5 waste residues export 6 dnockout pumps
7 DMF residue transport pipes, 8 pipe insulation materials
9 preheat coils.
Embodiment
As depicted in figs. 1 and 2, be preferred embodiment of the present invention.
The first step; The DMF distillation residue are positioned in the preheating can 1 (preheating unit), adopt steam preheating coil pipe 9 (steam is advanced by steam-in 3, is gone out by vapour outlet 4) and well heater 2 that it is carried out preheating at pot bottom; Make its temperature remain on (atmospheric pressure state) below 104 ℃; So that under the prerequisite that the least possible inflammable mixture produces, improve the flowability of DMF distillation residue, waste residue is discharged by waste residue outlet 5;
In second step, the DMF distillation residue after the preheating are delivered to the rotary type gas retort through the dnockout pump 6 and the DMF residue transport pipe 7 (feed system as shown in Figure 3) of concrete pipe insulation material 8; Residue adopts the mode of steamtraced piping to heat in the pipeline transport process, prevents that residue from condensing in pipeline;
The 3rd step rose to 150 ℃～800 ℃ with rotary type gas retort temperature, carried out oxygen debt and the anaerobic destructive distillation.Gas retort uses Sweet natural gas to act as a fuel, and adopts the mode of indirect heating to carry out.In retort process, for preventing to influence discharging, should guarantee heat-up rate≤10 ℃/Min because of the too fast residue caking of causing that heats up, can in the specified temp section, carry out the constant temperature destructive distillation of certain hour in case of necessity;
The 4th step collected the mixed gas that produces in the retort process, adopted indirect water-cooling tubular heat exchanger (condensing surface) that it is cooled off, and got into the burnt equipment of electric fishing afterwards, and mixed gas is separated into oil-water mixture and can not coagulates combustion gas; Can not coagulate combustion gas uses through the fuel of burner combustion as gas retort;
The flue gas that gas retort produces is that the organism in the DMF distillation residue under hot conditions scission reaction takes place and the high heating value combustible gas that produces, and it is reclaimed discharging again through flue gas purification system, and utilization helps to reduce process energy consumption; Specifically be that the gas retort flue gas is produced water vapor through waste heat boiler earlier, reclaim fume afterheat, again flue gas is carried out purifying and dedusting through flue gas purification system afterwards;
In the 5th step, use oil-water separation tank that oil-water mixture is separated into oil fuel and water; Isolated water can be used for replenishing the required water coolant of gas retort gas cleaning dedusting;
The gas retort flue gas can be used for waste heat boiler and produces water vapor, reclaims fume afterheat, again flue gas is carried out purifying and dedusting afterwards; The gas cleaning dust removal installation is mainly by aerosolater, the sweetener and take off mist equipment and form of spraying.
The 6th step, after destructive distillation finishes, use cold-slag slagging equipment (cold slag system) will remain solid slag and be cooled to below 50 ℃, obtain burnt matter charcoal.
More than be merely a specific embodiment of the present invention, but design concept of the present invention is not limited thereto, allly utilizes this design that the present invention is carried out the change of unsubstantiality, all should belong to the behavior of invading protection domain of the present invention.
Claims (7)
1. technology of utilizing retorting technique to handle the DMF of tannery distillation residue is characterized in that step is:
The first step is carried out preheating through preheating unit to the DMF distillation residue;
In second step, deliver to gas retort through the DMF distillation residue of feed system after with preheating;
The 3rd step rose to 150 ℃～800 ℃ with the gas retort temperature, carried out oxygen debt and the anaerobic destructive distillation;
The 4th step collected the mixed gas that produces in the retort process, through being separated into oil-water mixture and can not coagulating combustion gas after the condensing surface cooling;
The flue gas that gas retort is produced reclaims discharging again through flue gas purification system;
In the 5th step, use water-and-oil separator that oil-water mixture is separated into oil fuel and water;
The 6th step, after destructive distillation finishes, use cold slag system will remain solid slag and be cooled to below 50 ℃, obtain burnt matter charcoal.
2. a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue as claimed in claim 1, it is characterized in that: the said the first step, preheating unit utilize steam heating, electrically heated or fume afterheat type of heating that the DMF distillation residue are carried out preheating.
3. a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue as claimed in claim 1, it is characterized in that: the said the first step, preheating temperature remain on atmospheric pressure state below 104 ℃.
4. a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue as claimed in claim 1 is characterized in that: in said the 3rd step, in retort process, guarantee heat-up rate≤10 ℃/Min.
5. a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue as claimed in claim 1 is characterized in that: in said the 4th step, can not coagulate combustion gas and use through the fuel of burner combustion as gas retort.
6. a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue as claimed in claim 1; It is characterized in that: said the 4th step; The gas retort flue gas is produced water vapor through waste heat boiler earlier, reclaims fume afterheat, again flue gas is carried out purifying and dedusting through flue gas purification system afterwards.
7. a kind of technology of utilizing retorting technique to handle the DMF of tannery distillation residue as claimed in claim 1 is characterized in that: in said the 5th step, isolated water can be used for replenishing the required water coolant of gas retort flue gas purification system dedusting.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103092389A CN102408904A (en) | 2011-10-13 | 2011-10-13 | Process for treating tannery dimethylformamide (DMF) distillation residues through carbonization technology |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103084381A (en) * | 2013-02-07 | 2013-05-08 | 施雄飞 | Textile industry industrial waste resource regeneration device and method |
| CN103130670A (en) * | 2013-01-04 | 2013-06-05 | 南平博士达节能科技有限公司 | Synthetic leather dimethyl formamide (DMF) recycling residue processing technology and synthetic leather DMF recycling residue processing system |
| CN107903942A (en) * | 2017-12-27 | 2018-04-13 | 洛阳昊海工贸有限公司 | A kind of disposing technique of liquid state rectification residue |
| CN111635775A (en) * | 2020-06-09 | 2020-09-08 | 邢台旭阳化工有限公司 | Method for coking by using phthalic anhydride rectification residues |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212949A (en) * | 1997-09-30 | 1999-04-07 | 邓健郎 | Method and device for intermittent continuous recovery waste tyre for extracting active carbon |
| CN101332463A (en) * | 2008-07-22 | 2008-12-31 | 陈弘毅 | Industrialization reutilization device of environment protection type organic refuse and manufacturing technique thereof |
-
2011
- 2011-10-13 CN CN2011103092389A patent/CN102408904A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1212949A (en) * | 1997-09-30 | 1999-04-07 | 邓健郎 | Method and device for intermittent continuous recovery waste tyre for extracting active carbon |
| CN101332463A (en) * | 2008-07-22 | 2008-12-31 | 陈弘毅 | Industrialization reutilization device of environment protection type organic refuse and manufacturing technique thereof |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103130670A (en) * | 2013-01-04 | 2013-06-05 | 南平博士达节能科技有限公司 | Synthetic leather dimethyl formamide (DMF) recycling residue processing technology and synthetic leather DMF recycling residue processing system |
| CN103130670B (en) * | 2013-01-04 | 2015-07-08 | 南平博士达节能科技有限公司 | Synthetic leather dimethyl formamide (DMF) recycling residue processing technology and synthetic leather DMF recycling residue processing system |
| CN103084381A (en) * | 2013-02-07 | 2013-05-08 | 施雄飞 | Textile industry industrial waste resource regeneration device and method |
| CN107903942A (en) * | 2017-12-27 | 2018-04-13 | 洛阳昊海工贸有限公司 | A kind of disposing technique of liquid state rectification residue |
| CN111635775A (en) * | 2020-06-09 | 2020-09-08 | 邢台旭阳化工有限公司 | Method for coking by using phthalic anhydride rectification residues |
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Application publication date: 20120411 |