CN213348298U - Efficient organic waste gas nitrogen desorption regenerating unit - Google Patents
Efficient organic waste gas nitrogen desorption regenerating unit Download PDFInfo
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- CN213348298U CN213348298U CN202022214458.0U CN202022214458U CN213348298U CN 213348298 U CN213348298 U CN 213348298U CN 202022214458 U CN202022214458 U CN 202022214458U CN 213348298 U CN213348298 U CN 213348298U
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Abstract
The utility model provides an efficient organic waste gas nitrogen gas desorption regenerating unit, including two at least active carbon adsorption beds, the air inlet of active carbon adsorption bed passes through tee bend switching-over valve I and is connected with intake pipe and circulating pipe respectively, the circulating pipe in proper order with the circulation control valve, circulating fan, the heat medium of first heat exchanger is situated between the import, the heat medium of first heat exchanger is situated between the export, the air inlet of condenser, the gas outlet of condenser, the air inlet of second heat exchanger, the gas outlet of second heat exchanger, the air inlet of first heat exchanger, the gas outlet of first heat exchanger, the heater, tee bend switching-over valve II, the gas outlet of active carbon adsorption bed connects into the return circuit. The utility model discloses during the desorption, the high temperature nitrogen gas mixture who comes out from the active carbon adsorption bed, through first heat exchanger, give the nitrogen gas heating after the condensation, can reduce the cooling pressure of condenser on the one hand, and on the other hand can retrieve partly heat energy, the energy saving to partly heat energy, the energy saving are retrieved again to the second heat exchanger.
Description
Technical Field
The utility model relates to an organic waste gas processing apparatus, in particular to efficient organic waste gas nitrogen gas desorption regenerating unit.
Background
With the development of industrial production, a large amount of organic waste gas is inevitably discharged, and the organic waste gas generally comprises carbon hydrocarbon compounds, benzene and benzene series, alcohols, ketones, phenols, aldehydes, esters, amines, nitriles, cyanogen and the like. The problem is particularly more serious in chemical industries such as petroleum refining, coating, enameled wire and the like, and in industries such as electronics, casting, textile, printing, leather, shoe industry, furniture and food processing and feed processing. For example, in the production of a color coating production line of a steel (aluminum) plate, a steel strip coated with a coating enters a drying room to cure and dry the coating, organic solvent in the coating is evaporated in the drying room to form organic waste gas, the organic waste gas is discharged along with an exhaust system of the drying room to pollute the surrounding environment, and the organic waste gas is discharged into the atmospheric environment to cause environmental pollution through a series of chemical reactions. For example, some highly reactive organic waste gases may react photochemically with another atmospheric pollutant, nitrogen oxide, causing an increase in surface ozone concentration, forming photochemical smog pollution; the organic waste gas can also form secondary organic aerosol through nucleation and growth in a complex process, and the secondary organic aerosol is just an important component of the fine particulate matter PM 2.5. Organic waste gases themselves can also pose a significant threat to human health. For example, formaldehyde, benzene, toluene, etc. are commonly used to cause carcinogenic and teratogenic hazards. Therefore, the removal of photochemical smog, the reduction of particulate pollution, the improvement of urban air quality, the protection of the health of people and the control and removal of organic waste gas are imperative.
In the actual production process, according to different situations, the selection of a proper method is the key of organic waste gas treatment. At present, the treatment technology of organic waste gas mainly comprises two types: one is recovery technology and one is destruction technology. Activated carbon adsorption is one of recovery techniques, but only if the activated carbon adsorption is carried out, the activated carbon can reach saturation in a certain stage and can not be adsorbed any more, and at the moment, the activated carbon is either replaced or the activated carbon is required to be desorbed. The existing desorption modes mainly comprise three modes, one mode is a catalytic combustion mode, but the mode has high equipment cost and cannot be borne by medium and small enterprises. The second is steam desorption, mainly lets in steam and carries out the desorption to active carbon, and is with low costs, is fit for medium and small enterprise, but this kind of mode can produce a large amount of waste water, and the post processing cost is high to just having desorbed, active carbon remains moisture content, can influence the effect when the adsorption just begins next time. The third is nitrogen desorption, and nitrogen desorption equipment is with low costs, can not produce a large amount of waste water yet, but current nitrogen desorption mode, the energy does not carry out effectual utilization, and the energy consumption is big, not enough environmental protection.
SUMMERY OF THE UTILITY MODEL
The utility model provides an efficient organic waste gas nitrogen desorption regenerating unit has solved among the prior art when nitrogen desorption method carries out the desorption to the active carbon, and the energy does not carry out effectual utilization, and the energy consumption is big, the defect of not enough environmental protection.
The technical scheme of the utility model is realized like this:
a high-efficiency organic waste gas nitrogen desorption and regeneration device comprises at least two activated carbon adsorption beds, wherein air inlets of the activated carbon adsorption beds are respectively connected with an air inlet pipe and a circulating pipe through a three-way reversing valve I, the air inlet pipe is connected with a main fan and a filter, the circulating pipe is sequentially connected with a circulating control valve, the circulating fan, a heat medium inlet of a first heat exchanger, a heat medium outlet of the first heat exchanger, an air inlet of a condenser, an air outlet of the condenser, an air inlet of a second heat exchanger, an air outlet of the second heat exchanger, an air inlet of the first heat exchanger, an air outlet of the first heat exchanger, a heater, a three-way reversing valve II and an air outlet of the activated carbon adsorption beds to form a loop, a refrigerant inlet of the condenser is connected with a refrigerant inlet pipe, a refrigerant outlet of the condenser is connected with a heat medium inlet of, the desorption port of the activated carbon adsorption bed is connected with a desorption control valve, the desorption control valve is connected with a nitrogen inlet pipe, the nitrogen inlet pipe is connected with a nitrogen control valve, the water outlets of the first heat exchanger and the condenser are connected with the layering tank, the upper part of the layering tank is connected with a solvent tank, and the lower part of the layering tank is connected with a waste water tank.
Furthermore, the number of the condensers is two, and the two condensers are connected in series.
Further, the number of the heaters is two, and the two heaters are connected in parallel.
Further, the heater is a steam heater.
Furthermore, the activated carbon adsorption bed comprises a tank body and an activated carbon adsorption layer arranged in the tank body.
Further, the activated carbon adsorption layer is a honeycomb activated carbon layer.
Further, the refrigerant inlet pipe is connected with cold water or cold air.
The utility model has the advantages that: the utility model discloses during the desorption, the high temperature nitrogen gas mixture who comes out from the active carbon adsorption bed passes through first heat exchanger earlier, and the nitrogen gas heating after the condensation can reduce the cooling pressure of condenser on the one hand, and on the other hand can retrieve partly heat energy, the energy saving to through the cooling medium of condenser, after absorbing the heat, can reverse again, give the nitrogen gas heating after the cooling, retrieve partly heat energy, the energy saving.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a high-efficiency organic waste gas nitrogen desorption and regeneration device comprises at least two activated carbon adsorption beds 1, wherein an air inlet of each activated carbon adsorption bed 1 is respectively connected with an air inlet pipe 21 and a circulating pipe 31 through a three-way reversing valve I11, the air inlet pipe 21 is connected with a main fan 22 and a filter 23, the circulating pipe 31 is sequentially connected with a circulating control valve 32, a circulating fan 33, a heat medium inlet of a first heat exchanger 34, a heat medium outlet of the first heat exchanger 34, an air inlet of a condenser 35, an air outlet of the condenser 35, an air inlet of a second heat exchanger 36, an air outlet of the second heat exchanger 36, an air inlet of the first heat exchanger 34, an air outlet of the first heat exchanger 34, a heater 37, a three-way reversing valve II12 and an air outlet of the activated carbon adsorption beds 1 to form a loop, a refrigerant inlet of the condenser 35 is connected with a refrigerant inlet pipe, and a refrigerant, the three-way reversing valve II12 is connected with a chimney 25 through an exhaust pipe 24, a desorption port of the activated carbon adsorption bed 1 is connected with a desorption control valve 51, the desorption control valve 51 is connected with a nitrogen inlet pipe 52, the nitrogen inlet pipe 52 is connected with a nitrogen control valve 53, water outlets of the first heat exchanger 34 and the condenser 35 are connected with the layering tank 61, the upper part of the layering tank 61 is connected with a solvent tank 62, and the lower part of the layering tank 61 is connected with a wastewater tank 63.
Further, the number of the condensers 35 is two, and the two condensers 35 are connected in series.
Further, the number of the heaters 37 is two, and the two heaters are connected in parallel.
Further, the heater 37 is a steam heater.
Further, the activated carbon adsorption bed 1 comprises a tank body and an activated carbon adsorption layer arranged in the tank body.
Further, the activated carbon adsorption layer is a honeycomb activated carbon layer.
Further, the refrigerant inlet pipe is connected with cold water or cold air.
In the adsorption, the organic waste gas is filtered by the filter 23, passes through the activated carbon adsorption bed 1, and the organic substances in the organic waste gas are adsorbed by the activated carbon adsorption layer in the activated carbon adsorption bed 1 and then discharged through the exhaust duct 24 and the chimney 25.
During desorption, the organic waste gas is stopped being sucked through switching of the control valve, the nitrogen reversely blows off the activated carbon adsorption bed 1, organic matters are desorbed from the activated carbon, the activated carbon in the tank recovers activity, namely regeneration, high-concentration high-temperature gas desorbed from the activated carbon enters the first heat exchanger 34, is primarily cooled and heats the condensed nitrogen, then enters the condenser 35 to be secondarily cooled, then enters the second heat exchanger 36 to be primarily heated, then enters the first heat exchanger 34 to be secondarily heated, and finally enters the heater 37 to be heated for the third time and then enters the activated carbon adsorption bed 1, and the cyclic utilization of the nitrogen is realized through the circulation. Through thermal nitrogen desorption for a certain time, organic matters adsorbed by the active carbon are basically volatilized, so that the aim of desorption regeneration is fulfilled.
The utility model discloses during the desorption, the high temperature nitrogen gas mixture who comes out from the active carbon adsorption bed passes through first heat exchanger earlier, can reduce the cooling pressure of condenser on the one hand, and on the other hand can retrieve partly heat energy, the energy saving to through the cooling medium of condenser, after absorbing the heat, can reverse again, give the nitrogen gas heating after the cooling, retrieve partly heat energy, the energy saving.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The utility model provides an efficient organic waste gas nitrogen desorption regenerating unit which characterized in that: comprises at least two activated carbon adsorption beds, wherein the air inlet of each activated carbon adsorption bed is respectively connected with an air inlet pipe and a circulating pipe through a three-way reversing valve I, the air inlet pipe is connected with a main fan and a filter, the circulating pipe is sequentially connected with a circulating control valve, a circulating fan, a heat medium inlet of a first heat exchanger, a heat medium outlet of the first heat exchanger, an air inlet of a condenser, an air outlet of the condenser, an air inlet of a second heat exchanger, an air outlet of the second heat exchanger, an air inlet of the first heat exchanger, an air outlet of the first heat exchanger, a heater, a three-way reversing valve II and an air outlet of the activated carbon adsorption beds to form a loop, a refrigerant inlet of the condenser is connected with a refrigerant inlet pipe, a refrigerant outlet of the condenser is connected with a heat medium inlet of the second heat exchanger through a refrigerant outlet pipe, the three-, the desorption control valve is connected with a nitrogen inlet pipe, the nitrogen inlet pipe is connected with a nitrogen control valve, water outlets of the first heat exchanger and the condenser are connected with the layering tank, the upper part of the layering tank is connected with a solvent tank, and the lower part of the layering tank is connected with a waste water tank.
2. The efficient organic waste gas nitrogen desorption regeneration device as claimed in claim 1, wherein: the number of the condensers is two, and the two condensers are connected in series.
3. The efficient organic waste gas nitrogen desorption regeneration device as claimed in claim 1, wherein: the number of the heaters is two, and the two heaters are connected in parallel.
4. The efficient organic waste gas nitrogen desorption regeneration device according to claim 3, wherein: the heater is a steam heater.
5. The efficient organic waste gas nitrogen desorption regeneration device as claimed in claim 1, wherein: the active carbon adsorption bed comprises a tank body and an active carbon adsorption layer arranged in the tank body.
6. The efficient organic waste gas nitrogen desorption regeneration device as claimed in claim 1, wherein: the active carbon adsorption layer is a honeycomb active carbon layer.
7. The efficient organic waste gas nitrogen desorption regeneration device as claimed in claim 1, wherein: the refrigerant inlet pipe is connected with cold water or cold air.
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| CN202022214458.0U CN213348298U (en) | 2020-10-09 | 2020-10-09 | Efficient organic waste gas nitrogen desorption regenerating unit |
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| CN202022214458.0U CN213348298U (en) | 2020-10-09 | 2020-10-09 | Efficient organic waste gas nitrogen desorption regenerating unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471077A (en) * | 2022-01-27 | 2022-05-13 | 佛山市科蓝环保科技股份有限公司 | VOCs desorption device and VOCs desorption method of activated carbon assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471077A (en) * | 2022-01-27 | 2022-05-13 | 佛山市科蓝环保科技股份有限公司 | VOCs desorption device and VOCs desorption method of activated carbon assembly |
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