CN1065214C - Activated char regeneration method and equipment in process of activated char treating nitrobenzene waste water - Google Patents
Activated char regeneration method and equipment in process of activated char treating nitrobenzene waste water Download PDFInfo
- Publication number
- CN1065214C CN1065214C CN 96117148 CN96117148A CN1065214C CN 1065214 C CN1065214 C CN 1065214C CN 96117148 CN96117148 CN 96117148 CN 96117148 A CN96117148 A CN 96117148A CN 1065214 C CN1065214 C CN 1065214C
- Authority
- CN
- China
- Prior art keywords
- active carbon
- waste water
- benzene
- nitrobenzene
- gac
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The present invetnion relates to a self regeneration method in a technology for treating nitrobenzene waste water by active carbon and an appliance thereof. In the self regeneration method in a technology for treating nitrobenzene waste water by active carbon, a heater is directly arranged in an adsorption device, water content in the active carbon can be thoroughly removed by a heating method in the adsorption device after the active carbon adsorbes a certain amount of nitrobenzene to become saturated, and simultaneously, the self regeneration method ensures that nitrobenzene molecules on the active carbon are not decomposed; raw material benzene circularly passes through an active carbon layer in the adsorption device until the content of the nitrobenzene in the benzene remains unchanged; the benzene in the active carbon layer in the adsorption device is thoroughly removed and is recovered by the heating method, and therefore, the regeneration treating process of the active carbon is completed. The recovered raw material benzene can return, and the recovered raw material benzene is used as the raw materials of the production of the nitrobenzene and is continuously acted.
Description
The present invention relates to a kind of renovation process of gac, particularly the autosynthesis method in the activated carbon treatment nitrobenzene waste water technology.
The oil of mirbane that contains in the waste water that produces in the oil of mirbane production process has water-soluble low, characteristics such as toxicity big, biological degradability difference, country's its discharging of strict control.Improvement to this waste water has multiple treatment processs such as biochemistry, extraction, absorption, chemistry.What for example have uses heat exchanger, under 120 bar pressures, nitrobenzene waste water is heated to about 300 ℃, enters reactor then, cools off and reduces pressure, and the organism thermolysis is become materials such as carbonic acid gas and carboxylic acid, but this method can not be satisfactory.External afterwards BASF AG improves this process row, has invented with nitric acid under certain temperature and pressure, and the waste water during treatment of Nitrobenzene is produced is to destroy the aromatic nitro compound in the waste water.But this complex process, the expense height, facility investment is big.The method that also has with benzene extraction nitrobenzene waste water, but also have complex process, investment is big, and defectives such as equipment requirements height are difficult for promoting the use of.What also have in addition adsorbs under the PH0.5-3.0 condition with resin Polysorb40/100 or Polysorb30/100, inhales regeneration with polar organic solvent or alkaline hydrolysis.But this method needs the material that desorb is got off is handled again, otherwise can pollute.And the existing many reports of organic waste water are handled in charcoal absorption, but the processing that is used for nitrobenzene waste water does not also have the practicable method of a cover detailed complete both at home and abroad, especially charcoal absorption saturated after, its regeneration problem is puzzlement people's a difficult point always, usually need thorax regeneratory furnace more than that active carbon high-temp is regenerated, from an adsorption device, take out saturated gac during operation earlier, put into regeneratory furnace regeneration again, each operation is all like this, its complex operation, complex process, the energy consumption height makes the cost up of wastewater treatment, and reclaim equiment that need be other, invest also greatly, and this renovation process might cause secondary pollution the pollution transportation in the waste water in atmosphere.In addition, also useful solvent reclamation gac, if but solvent is selected words improperly, can cause secondary pollution equally.Above-mentioned two kinds of renovation process all can make the activity decline coefficient of gac bigger along with the increase of regeneration times.
Purpose of the present invention is exactly in order to address the above problem, and it is little to propose a kind of investment, and technology is simple, and is easy to operate, non-secondary pollution and do not reduce regeneration method of active carbon in the active activated carbon treatment nitrobenzene waste water technology.
Technical solution of the present invention:
Regeneration method of active carbon in a kind of activated carbon treatment nitrobenzene waste water technology, it is characterized in that gac has adsorbed a certain amount of oil of mirbane and reached capacity behind the state in adsorption unit, directly in adsorption unit, the moisture content in the gac is caught up with to the greatest extent with heating means, temperature is controlled at 60-110 ℃, makes that the oil of mirbane molecule on the gac is not decomposed; To produce benzene feedstock that oil of mirbane uses then and cycle through active carbon layer in the adsorption unit, till nitrobenzene in benzene feedstock remains unchanged, with heating means the benzene in the active carbon layer in the adsorption unit is caught up with most recovery again, temperature still is controlled at 60-110 ℃, gac ripple manipulation of regeneration finishes like this, the raw materials for production that reusable treatment of Nitrobenzene waste water, the benzene feedstock after the recovery return as oil of mirbane continue to use.
The present invention uses the main production raw material benzene of oil of mirbane as regenerated solvent, and the benzene after the regeneration continues to reclaim use, can not produce secondary pollution.The inventive method and facility investment are few, and working cost is low, and be easy and simple to handle, and it need not the regenerative operation that special-purpose reclaim equiment can be finished gac.The present invention can be under normal temperature, normal pressure, neutrality or weak acid and weak base condition, use cheap gac to come treatment of Nitrobenzene waste water as sorbent material, and in adsorption unit, can finish the regeneration of saturated activity charcoal under these conditions, it need not gac is taken out, also need not special-purpose reclaim equiment, its reclaim equiment is exactly to install well heater in the adsorption unit additional to get final product, and gets final product work with low-pressure steam, has fundamentally solved the secondary pollution problem of oil of mirbane.The present invention not only can all reclaim the oil of mirbane in the waste water, and can guarantee the unlikely decline of adsorptive power of gac, makes big leap ahead in work-ing life of gac.
In the inventive method, in its adsorption unit during the regeneration of activated carbon of active carbon layer, in catching up with to the greatest extent it, heating before the moisture content, preferably washes active carbon layer earlier with water, with the residual floss on the flush away gac.The catching up with water, catch up with in the benzene operation of regeneration of activated carbon process, its heating means all preferably adopt Azotropic distillation method, and temperature all preferably is controlled at 70-80 ℃.Gac in the adsorption unit active carbon layer preferably adopts the granulated active carbon of column or other shape.The inventive method feeds in the benzene feedstock operation in circulation, and it preferably is controlled at below 0.8% by the nitrobenzene in the recycle feed benzene of active carbon layer.Regeneration of activated carbon equipment utilization absorbent charcoal adsorber of the present invention is a matrix, is linked to be closed circuit circulatory system by pipeline and water cooler and benzene jar again, and is provided with heating member in the active carbon layer in the adsorption unit.Heating member in its adsorption unit in the active carbon layer can be the steam coils heating arrangement, also can be the tubulation electric heating device.Also can be other heating arrangement.
Further specify below in conjunction with embodiment.
Adopt the conventional adsorption unit that contains active carbon layer to come treatment of Nitrobenzene waste water, pump into waste water in the adsorption unit after the husky filter of sand filter earlier this moment, generally with the oil of mirbane in two the series system absorption waste water, by the oil of mirbane molecule in the charcoal absorption waste water, the discharge water of handling well that meets national standard that is from the adsorption unit discharge, the about 300PPM of nitrobenzene in the nitrobenzene waste water before the usually conduct then is less than or equal to 10PPM after the processing.
After the gac in the active carbon layer in the adsorption unit was saturated, washed the gac in the active carbon layer this moment earlier with water, and the floss that is adsorbed on activated carbon surface is washed off.
Behind the washing gac, water in the adsorption unit is drained, pump in the adsorption unit by the benzene feedstock of valve the production oil of mirbane in the benzene jar, open steam heater, make the logical steam of steam coils in the active carbon layer, open water cooler simultaneously, temperature be controlled at 70-80 ℃ catch up with the moisture content in the gac to the greatest extent with the method for component distillation till, can stop heating.
Open the benzene jar, the benzene in the benzene jar is pumped in the adsorption unit, flow is 2 cubes per hour, cycles through active carbon layer, and the oil of mirbane on the gac is constantly eluted, and when the nitrobenzene in the recycle benzene remains unchanged, can stop the benzene circulation.
After the benzene circulation, the benzene in the adsorption unit is put back in the benzene jar, water is squeezed in the adsorption unit, open steam heater again with the heating of the coil pipe in the active carbon layer, open water cooler simultaneously, temperature is controlled at 70-80 ℃, method with component distillation is caught up with benzene to the greatest extent, and is recovered in the benzene jar.
Benzene in the benzene jar can repeat the gac in the regenerated carbon layer, when nitrobenzene reaches 0.8% in the benzene of benzene jar, is about to this benzene and turns back to the oil of mirbane workshop in order to produce oil of mirbane, newer benzene feedstock is pumped into the benzene jar and gets final product.
System of the present invention so just can finish the regenerative operation of gac as required at any time in the adsorption treatment nitrobenzene waste water, its adsorption efficiency 〉=90%, regeneration frequency be 300-600 ton waste water/time, gac reaches 9000-15000 ton waste water/ton gac work-ing life, effect is very desirable.
Claims (5)
1, the regeneration method of active carbon in a kind of activated carbon treatment nitrobenzene waste water technology, it is characterized in that gac has adsorbed a certain amount of oil of mirbane and reached capacity behind the state in adsorption unit, directly in adsorption unit, the moisture content in the gac is caught up with to the greatest extent with heating means, temperature is controlled at 60-110 ℃, makes that the oil of mirbane molecule on the gac is not decomposed; To produce benzene feedstock that oil of mirbane uses then and cycle through active carbon layer in the adsorption unit, till nitrobenzene in benzene feedstock remains unchanged, with heating means the benzene in the active carbon layer in the adsorption unit is caught up with most recovery again, temperature still is controlled at 60-110 ℃, gac ripple manipulation of regeneration finishes like this, the raw materials for production that reusable treatment of Nitrobenzene waste water, the benzene feedstock after the recovery return as oil of mirbane continue to use.
2, by the regeneration method of active carbon in the described activated carbon treatment nitrobenzene waste water of claim 1 technology, when it is characterized in that the regeneration of activated carbon of active carbon layer in the adsorption unit, in catching up with to the greatest extent it, heating before the moisture content, washes active carbon layer earlier with water, with the residual floss on the flush away gac.
3,, it is characterized in that temperature all is controlled at 70-80 ℃ the catching up with water, catch up with the heating means in the benzene operation all to adopt Azotropic distillation method of regeneration of activated carbon process by the regeneration method of active carbon in the described activated carbon treatment nitrobenzene waste water of claim 1 technology.
4,, it is characterized in that the granulated active carbon of the gac employing column in the active carbon layer by the regeneration method of active carbon in the described activated carbon treatment nitrobenzene waste water of claim 1 technology.
5, by the regeneration method of active carbon in the described activated carbon treatment nitrobenzene waste water of claim 1 technology, it is characterized in that being controlled at below 0.8% by the nitrobenzene in the recycle feed benzene of active carbon layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117148 CN1065214C (en) | 1996-10-29 | 1996-10-29 | Activated char regeneration method and equipment in process of activated char treating nitrobenzene waste water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96117148 CN1065214C (en) | 1996-10-29 | 1996-10-29 | Activated char regeneration method and equipment in process of activated char treating nitrobenzene waste water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1152551A CN1152551A (en) | 1997-06-25 |
| CN1065214C true CN1065214C (en) | 2001-05-02 |
Family
ID=5124083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96117148 Expired - Fee Related CN1065214C (en) | 1996-10-29 | 1996-10-29 | Activated char regeneration method and equipment in process of activated char treating nitrobenzene waste water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1065214C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9278876B2 (en) | 2010-10-27 | 2016-03-08 | Peking University | Treatment of waste product |
-
1996
- 1996-10-29 CN CN 96117148 patent/CN1065214C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1152551A (en) | 1997-06-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100579921C (en) | Treatment for wastewater in para-nitraniline production and method for resource recovery and use | |
| CN102649998B (en) | Method for separating and enriching copper, cadmium and zinc in copper and cadmium sediment | |
| CN101337707B (en) | Method for processing dimethylamine waste water by ion-exchange method | |
| KR100201422B1 (en) | Apparatus and method for regenerating active carbon | |
| CN101693668B (en) | Absorption distillation method for using adsorption resin to treat waste water containing dimethyl formamide | |
| CN103848472B (en) | A kind of phenolic wastewater removes device and removing process thereof | |
| CN1187275C (en) | Treatment process for two stage recycling alkali waste liquid drained off by process system of synthesizing octanol | |
| CN101139152A (en) | Printing and dyeing wastewater advanced treatment and recycling method by using resin | |
| CN1065214C (en) | Activated char regeneration method and equipment in process of activated char treating nitrobenzene waste water | |
| WO2021000224A1 (en) | Method for separation and purification of grape polyphenols by means of resin | |
| CN215161034U (en) | Equipment for recovering phosphoric acid from hardware fitting cleaning waste acid | |
| CN114177694A (en) | Cyclic oil removal method for cobalt chloride solution | |
| CN108554375B (en) | Method for modifying activated carbon adsorbent | |
| CN203715324U (en) | Phenolic wastewater removing device | |
| CN105597486A (en) | Active carbon granule adsorbing and recycling device and method | |
| CN110252269A (en) | A kind of resin regeneration method for handling containing high-boiling components waste water | |
| CN102949984A (en) | Macro-porous adsorption resin regeneration method | |
| CN110523219B (en) | Treatment system for industrial tail gas containing ethylene glycol and use method thereof | |
| CN211112234U (en) | Acid recovery device for reverse ion exchange | |
| CN103319019A (en) | Aspartame production mother solution recycling and treating method and system | |
| CN1544142A (en) | Method for eluting, regenerating and removing organics using active carbon microwave reinforced solvent | |
| CN101260020B (en) | Method for treating benzene-containing waste water and reclaiming benzene | |
| CN111318128B (en) | Adsorption recovery system for nitrogen regeneration and adsorption recovery method thereof | |
| CN109012602A (en) | A kind of preparation method of cocoanut active charcoal | |
| CN219239268U (en) | Hydrogenation purification nitrogen production equipment without regeneration gas loss |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |