CN113426252A - Washing, absorbing and purifying system - Google Patents
Washing, absorbing and purifying system Download PDFInfo
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- CN113426252A CN113426252A CN202110742731.3A CN202110742731A CN113426252A CN 113426252 A CN113426252 A CN 113426252A CN 202110742731 A CN202110742731 A CN 202110742731A CN 113426252 A CN113426252 A CN 113426252A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1412—Controlling the absorption process
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1487—Removing organic compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
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Abstract
The embodiment of the invention discloses a washing, absorbing and purifying system, which comprises: absorption unit, regeneration unit and cooling unit, absorption unit is the progressive concentrated scrubbing tower structure of multilayer, and wherein each layer is an independent washing absorption unit, and it accomplishes the progressive purification to organic waste gas in proper order by the lower floor to the superiors to with the gas after purifying from the top of the tower discharge, the absorption washing liquid of each layer by the superiors to the lower floor discharge in proper order extremely regeneration unit regenerates the back, passes through the absorption liquid after regenerating carry out cyclic utilization after cooling unit cools off. This scheme adopts the design of the gradual concentrated formula scrubbing tower of multilayer, when overcoming traditional circulation scrubbing tower drawback, full play washing absorption liquid's advantage, furthest improves the purification efficiency of system, reduces whole running cost, extension washing liquid life.
Description
Technical Field
The embodiment of the application relates to the technical field of environmental protection, in particular to a washing, absorbing and purifying system.
Background
With the rapid development of the industrialized development of China, the living standard of people is continuously improved, higher requirements are put forward on the environmental quality, particularly the atmospheric environmental quality, in the field of the existing waste gas treatment, particularly the absorption and purification treatment of VOC organic waste gas scrubbing, the defects of the existing traditional circulating washing tower form with large and wide use amount are more obvious, and the environment-friendly circulating washing tower is difficult to adapt to the situation that the requirements of people on environmental protection are continuously improved. The traditional waste VOC organic waste gas scrubbing, absorbing, circulating and washing treatment process causes a huge bottleneck for the development of the scrubbing solution absorbing and treating technical field itself used by VOC organic waste gas and waste gas with various other components. In the prior coping situation, for the requirement of VOC organic waste gas treatment, the coping washing and purifying method is no matter what form of washing and absorbing washing liquid, the adopted washing form and other basic forms are all the traditional circulating washing tower purifying process: although the prior treatment and purification technology for purifying VOC organic waste gas and other waste gas with various components by the traditional circulating washing tower can relieve the contradiction between the waste gas emission and the environmental protection requirement, the self limitation of the traditional treatment and purification technology for purifying VOC organic waste gas by the traditional circulating washing tower and the inherent short plate are difficult to solve fundamentally.
At present, the traditional washing tower is basically adopted in the application market of the VOC waste gas treatment liquid absorption technology, and the processes of circular washing and periodic regeneration are adopted no matter what type of washing tower is adopted, so that the defects of the traditional washing tower are gradually shown in the long-term use process, and the popularization and development of the liquid washing and VOC waste gas absorption treatment process are influenced. The main defects of the method comprise: the absorption efficiency is generally not high; the usage amount of the washing liquid for circular washing is large; the impact load resistance is poor, the absorption efficiency of the washing tower is unstable, and the emission is unstable after reaching the standard.
Disclosure of Invention
The embodiment of the invention provides a washing, absorbing and purifying system, which adopts a design of a multilayer progressive concentrated washing tower, overcomes the defects of the traditional circulating washing tower, simultaneously gives full play to the advantages of washing and absorbing liquid, improves the purifying efficiency of the system to the maximum extent, reduces the integral operation cost and prolongs the service life of washing liquid.
The embodiment of the invention provides a washing, absorbing and purifying system, which comprises: absorption unit, regeneration unit and cooling unit, absorption unit is the progressive concentrated scrubbing tower structure of multilayer, and wherein each layer is an independent washing absorption unit, and it accomplishes the progressive purification to organic waste gas in proper order by the lower floor to the superiors to with the gas after purifying from the top of the tower discharge, the absorption washing liquid of each layer by the superiors to the lower floor discharge in proper order extremely regeneration unit regenerates the back, passes through the absorption liquid after regenerating carry out cyclic utilization after cooling unit cools off.
Optionally, the multi-layer progressively concentrating wash column structure comprises:
the device comprises a washing and absorbing filler device, an absorbing tower body, a liquid level controller, an absorbing liquid replacement and supplement device, a washing liquid replacement device, an absorbing liquid replacement device, an air inlet device, a multilayer circulating spraying device and an air exhaust device.
Optionally, the washing and absorbing filler device comprises a ventilation and drainage flow guide device and a washing filler layer.
Optionally, the organic waste gas passes through each layer of washing filler layer from the bottom of the absorption tower through the uniform gas distribution device and then is absorbed and purified by the absorption liquid in each layer of washing filler layer, wherein the concentration of organic matters in the organic waste gas is sequentially reduced from bottom to top, the concentration of the absorption liquid in each layer of washing filler layer is sequentially increased from top to bottom, the absorption liquid in the lowest layer is conveyed to the regeneration unit through the absorption liquid displacement device, and the absorption liquid in the upper layer is conveyed to the lower layer through the absorption liquid displacement device.
Optionally, the multilayer circulating spraying device sprays clean absorption liquid into the washing filler layer, a liquid film is formed on the surface of the washing filler layer, the organic waste gas is adsorbed and purified by the liquid film of the washing filler layer, and the absorption liquid absorbing organic matters in the organic waste gas is collected into the collection tank through the ventilation hydrophobic diversion device and is discharged into the water tank corresponding to the layer.
Optionally, the multi-layer circulating spraying device is used for circularly spraying the absorption liquid in the water tank to the washing filler layer, and after spraying for a set time, the absorption liquid in the water tank is discharged to the next layer.
Optionally, the ventilation and drainage guide device comprises a rectangular ventilation and drainage guide device and a circular ventilation and drainage guide device, and the ventilation and drainage guide device comprises a ventilation hole and a water retaining groove.
Optionally, the absorption liquid replacement device comprises: liquid level controller, filter, positive displacement pump, flowing back pipeline and valve, multilayer circulation sprinkler includes: the device comprises a filter, a spray pump, a spray circulation pipeline and a circulation adjusting valve.
Optionally, the regeneration unit includes desorption regeneration unit box, inlet means, heat exchange device, drain, circulating device and exhaust device, the cooling unit set up in the regeneration unit lower part.
Optionally, the cooling unit includes a cooling unit box body, a liquid level controller, a heat exchange device, a liquid drainage device and a circulation device.
In a second aspect of the present invention, there is provided a washing, absorbing and purifying method implemented by the washing, absorbing and purifying system, wherein the system includes an absorption unit, a regeneration unit and a cooling unit, the absorption unit is a multi-layer progressively-concentrated washing tower structure, and each layer is an independent washing and absorbing unit, and the method specifically includes the following steps:
by means of the absorption unit, it is accomplished the progressive purification to organic waste gas in proper order by the lower floor to the superiors to gas after will purifying is discharged from the top of the tower, and the absorption washing liquid of each layer is discharged extremely in proper order by the upper strata to the lower floor regeneration unit is regenerated the back, passes through the absorption liquid after regenerating carry out cyclic utilization after cooling unit cools off.
The washing absorption purification system provided by the scheme is a washing absorption innovation process used by VOC waste gas and waste gas of other multiple components, replaces a large amount of traditional circulating washing towers used in the existing market with dynamic flow washing towers, improves the purification efficiency, reduces the operation cost, prolongs the service life of washing liquid, and is an upset to the existing VOC organic waste gas washing absorption purification system. The invention develops a new method, adopts a special structural form, combines the reality of the VOC organic waste gas liquid absorption treatment field, overcomes the limitation of the traditional circulating washing tower, invents a multilayer gradual concentration type washing tower VOC waste gas purification method, fully exerts the advantages of the washing absorption liquid while overcoming the defects of the traditional circulating washing tower, improves the purification efficiency of the system to the maximum extent and reduces the whole operation cost.
Drawings
FIG. 1 is a system block diagram of a scrubbing, absorbing and purifying system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an absorption unit in a scrubbing, absorbing and purifying system according to an embodiment of the present invention;
FIG. 3 is a schematic plan view of a rectangular ventilation and drainage guide device according to an embodiment of the present invention;
FIG. 4 is a schematic plane view of a rectangular ventilation and drainage device according to an embodiment of the present invention;
FIG. 5 is a schematic plan view of a rectangular ventilation and drainage guide device according to an embodiment of the present invention;
FIG. 6 is a schematic plane view of a rectangular ventilation and drainage device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of an apparatus in which a regeneration unit and a cooling unit are integrally designed according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad invention. It should be further noted that, for convenience of description, only some structures, not all structures, relating to the embodiments of the present invention are shown in the drawings.
Although the prior art for treating and purifying VOC organic waste gas by a circulating washing tower can relieve the contradiction between the waste gas emission and the environmental protection requirement, the problems of the self limitation of the prior art for treating and purifying VOC organic waste gas by a circulating washing tower and the inherent short plate are difficult to fundamentally solve.
The invention develops a new method, adopts a special structural form, combines the reality of the liquid absorption treatment field of VOC organic waste gas and other waste gas with various components, and gets rid of the limitation of the traditional circulating washing tower.
Among them, the prior art shortcoming lies in:
1. the absorption efficiency is generally not high;
2. the usage amount of the washing liquid for circular washing is large;
3. the impact load resistance is poor, the gas absorption device cannot adapt to the change of system gas parameters, the stability of the absorption efficiency is difficult to ensure, and the luxury is expected to reach the standard stably;
4. the popularization and the application of the technology of the VOC treatment and purification by washing and absorption are influenced.
The invention of the scheme has the advantages that:
1. aiming at the defects of the traditional circulating washing tower purification system used for VOC organic waste gas and other waste gas with various components, the invention adopts a compact skid-mounted integral structure for the absorption washing purification system with a multi-layer gradual concentration structure of all types with different waste gas treatment scales, and the equipment modification part is compact in matching with the original equipment, reasonable in structure and attractive in appearance;
2. the multilayer progressive concentration type washing tower VOC waste gas purification system adopts different condensation recovery combination forms according to the characteristics of organic waste gas in different scenes, reduces the operation and the investment scale of main equipment, and simultaneously gives consideration to the overall carbon emission index;
3. the washing and absorption of the invention adopts a multilayer continuous flow process for gradually improving the dissolution concentration and the desorption and regeneration adopts an up-and-down integral design structure, so that the system is compact, the integrity is strong and the operation and maintenance are convenient;
4. the invention adopts a ventilation, drainage, diversion and airflow distribution structure, the washing liquid is replaced in a sequencing batch manner, the control precision is high, the required amount of the added and replaced absorption liquid at any time period according to actual needs can be ensured, and the system is ensured to be in a relatively dynamic flowing state, thereby ensuring the stability and high efficiency of the whole absorption efficiency;
5. the exhaust concentration index can be designed and determined, and the accuracy of the exhaust concentration index is ensured through real-time monitoring;
6. the sequencing batch continuous washing liquid feeding and replacing system ensures the passing effect of the upper layer of absorption liquid with the maximum absorption power, can randomly adjust the feeding amount, ensures the discharge index to be stable and accurate, and provides the passing care of limiting purification for realizing zero discharge of waste gas.
Fig. 1 is a system block diagram of a scrubbing, absorbing and purifying system according to an embodiment of the present invention. As can be seen, the washing, absorbing and purifying system includes an absorption unit 101, a regeneration unit 102, and a cooling unit 103. Wherein, this absorption unit 101 is the progressive concentrated scrubbing tower structure of multilayer, and wherein each layer is an independent washing absorption unit, and it accomplishes the progressive purification to organic waste gas in proper order by the lower floor to the superiors to discharge the gas after purifying from the top of the tower, the absorption washing liquid of each layer is discharged extremely in proper order by the upper floor to the lower floor regeneration unit 102 regenerates the back, passes through the absorption liquid after regenerating carry out cyclic utilization after cooling unit 103 cools off.
The following is a detailed description of the absorption unit 101, the regeneration unit 102, and the cooling unit 103, respectively, as follows:
fig. 2 is a schematic diagram of an absorption unit in a scrubbing, absorbing and purifying system according to an embodiment of the present invention. As shown in the figure, the device comprises a washing and absorbing filler device 1011, an absorbing tower body 1012, an air inlet device 1013, an air exhaust device 1014, an absorbing liquid replacement and supplement device 1015, a washing liquid replacement device 1016, an absorbing liquid replacement device 1017 and a multi-layer circulating spraying device 1018, wherein the washing and absorbing filler device 1011 comprises a washing filler layer 10111 and a ventilation and drainage diversion device 10112.
Specifically, after the organic waste gas is treated by the pretreatment device, dust particles, paint mist, moisture or other factors influencing absorption and product recovery quality are removed, the organic waste gas enters the absorption tower through the inlet of the absorption tower through the air intake device 1013, passes through the uniform air distribution device, so that the organic waste gas entering the tower body uniformly and upwards enters the absorption layers at all levels, the organic components in the waste gas are absorbed by the absorption liquid layer by layer, the absorption liquid at the lowest layer is firstly absorbed and saturated, the upwards saturation degree is gradually reduced, the newly-entering absorption liquid at the uppermost layer is still fresh, the organic matter concentration in the gas after absorption is gradually reduced, the absorption liquid is fresher, the absorption power is larger, the absorption capacity is stronger, therefore, the organic concentration in the gas after passing through the last layer of absorption liquid is far lower than or far lower than the national or local emission standard layer by layer, and the influence on the surrounding environment is eliminated, thus, the emission concentration using this absorption process is perfectly programmable. The gas after absorption and purification is discharged from the tower top and can be recycled to a production system or a workshop as required, so that the gas is far below the national emission standard and can be discharged safely.
Wherein each layer of the washing absorption filler device 1011 arranged in a plurality of layers is an independent washing absorption unit, the circulating spray pump at the uppermost layer uniformly sprays fresh absorption liquid to the surface of the washing filler layer 10111 through the spray nozzles on the circulating pipeline, so that washing absorption liquid films are uniformly formed on the surface of the washing filler layer 10111, when the gas flow from bottom to top passes through the filler layer, the gas flow contacts with the liquid film of the washing filler layer 10111, the organic molecules in the gas are absorbed by the effective molecules in the absorption liquid, the gas phase is transferred into the liquid phase, the mass transfer reaction is completed, thus, the washing absorption liquid is removed and purified from the gas phase, absorbs organic molecules in the gas phase, passes through the ventilation and drainage diversion device 10112, is collected in a peripheral collecting tank at the inner diameter of the tank body of the layer, is discharged to the water tank (for example, 1019 in fig. 2) of the layer through a liquid discharge overflow hole, and is recycled. After the saturated washing absorption liquid in the lower-layer water tank is emptied, the washing absorption liquid in the upper-layer water tank is sequentially discharged to the lower-layer water tank after the saturated washing absorption liquid in the lower-layer water tank is circularly sprayed for a set time.
The discharging and replacing sequence of the washing absorption liquid of each layer of water tank is as follows: and replacing from bottom to top in sequence. The water tank at the lowest layer is discharged to the tower bottom, the washing absorption liquid of the water tank at the upper layer adjacent to the water tank at the lowest layer is discharged to the water tank at the lower layer, and the rest is done in a analogized way, and the water tank at the lowest layer is sequentially discharged, replaced and gradually concentrated layer by layer, so that the washing absorption liquid of the water tank at the lowest layer is absorbed and saturated, and then sent to a desorption regeneration device for recycling after regeneration. The washing absorption liquid with saturated absorption is conveyed to the regeneration unit 102 through the absorption liquid replacement device 1017, the regeneration unit 102 cools the cooling unit 103 after regeneration is completed, and the absorption liquid is recycled after absorption power is recovered.
Fig. 3 is a schematic view of a rectangular ventilation hydrophobic diversion device according to an embodiment of the present invention, fig. 3 is a schematic plan view of a rectangular ventilation hydrophobic diversion device according to an embodiment of the present invention, a corresponding plan view of the rectangular ventilation hydrophobic diversion device is shown in fig. 4, and fig. 4 is a schematic plan view of a rectangular ventilation hydrophobic diversion device according to an embodiment of the present invention. The ventilation and drainage flow guide device comprises a ventilation hole and a water retaining groove. In another embodiment, a circular ventilation hydrophobic diversion device is provided, as shown in fig. 5, fig. 5 is a schematic plan view of a rectangular ventilation hydrophobic diversion device provided in an embodiment of the present invention, and a corresponding plan view is shown in fig. 6, and fig. 6 is a schematic plan view of a rectangular ventilation hydrophobic diversion device provided in an embodiment of the present invention. The ventilation and drainage flow guide device comprises a ventilation hole and a water retaining groove. Wherein, the absorption liquid replacement and supplement device can comprise a supplement pipe and a supplement valve; the wash solution displacement device may include a displacement drain valve; the absorption liquid displacement device may include a liquid level controller, a filter, a liquid discharge pump, a liquid discharge pipe, and a liquid discharge valve control system; the air intake device can comprise a pretreatment device, an air inlet and a uniform air distribution device; the exhaust device can comprise an exhaust outlet, an exhaust pipeline, a monitoring instrument (VOC concentration), a gas filtering device and an exhaust fan; the multi-layer circulation spraying device can comprise a circulation water tank, a filter, a spraying pump, a spraying circulation pipeline and a circulation adjusting valve.
Referring to the regeneration unit 102, as shown in fig. 7, fig. 7 is a schematic diagram of an apparatus in which the regeneration unit and the cooling unit are integrally designed according to an embodiment of the present invention. The regeneration unit takes a heating desorption regeneration unit as an example, the saturated absorption washing liquid is sent to the upper heating desorption regeneration unit through the absorption liquid replacement device, the heating medium transfers heat to the radiating fins through the pipelines, the radiating fins conduct the heat to the absorption liquid, when the temperature of the absorption liquid is raised to a set temperature, organic components dissolved and absorbed by the absorption liquid are heated and evaporated, the organic components are changed into organic steam to be discharged from the exhaust port, and the organic steam is pumped to the condensation recovery device through the air exhaust fan and is recovered for use after condensation. The absorption liquid after the organic component is evaporated is sent to a cooling unit at the lower part of the device through a valve. In order to improve the regeneration efficiency, a reinforced circulation device consisting of a circulation pipeline, a circulation water pump and a regulating valve is arranged on a bypass of the heating desorption regeneration unit so as to reinforce the turbulence in the box body, improve the mass transfer effect, shorten the regeneration time and reduce the regeneration operation cost.
The regeneration unit is a strengthened turbulent heating circulating device consisting of a box body with a certain volume, a liquid level controller, a heat exchange device, a heat transfer medium heat source, a circulating pump, a circulating pipeline and a regulating valve. The heating desorption regeneration unit and the cooling unit are integrally designed, the cooling unit is positioned at the lower part of the heating desorption regeneration unit, and absorption liquid discharged by desorption regeneration directly enters the cooling unit through the regulating valve.
The regeneration unit comprises a desorption regeneration unit box body, a liquid inlet device, a heat exchange device, a liquid drainage device, a circulating device and an exhaust device, wherein the cooling unit is arranged at the lower part of the regeneration unit, and the liquid inlet device comprises a liquid inlet pipeline and an adjusting valve; the heat exchange device comprises a heat exchanger and a heating heat source; the liquid discharge device comprises a liquid discharge pipeline and a regulating valve; the circulating device comprises a circulating pump, a circulating pipeline and a circulating regulating valve; the exhaust device comprises an exhaust pipeline, a monitoring instrument (VOC concentration), a gas filtering device and an exhaust fan.
The cooling unit and the regeneration unit are designed integrally. The absorption liquid after desorption and regeneration is directly discharged to the cooling unit through the regulating valve by the regeneration unit, the cooling medium is in indirect contact with the absorption liquid through the heat exchanger, the cooling medium flows in the pipe, the absorption liquid to be cooled exchanges heat with the cooling medium through the radiating fins, the heat of the absorption liquid is taken out through the cooling medium and is discharged after exchanging with the cold quantity providing device, and the absorption liquid reaching the set temperature after cooling is sent to the absorption liquid storage tank through the conveying pump for recycling. In order to accelerate the cooling efficiency, the bypass is provided with a cooling circulation device consisting of a circulation pipeline, a circulation pump and a regulating valve so as to strengthen the turbulent motion of fluid in the cooling unit box body, improve the mass transfer effect, shorten the cooling time and reduce the cooling operation cost. After the absorption liquid is cooled for a set time, the temperature of the absorption liquid reaches a set temperature, the liquid is discharged, and the cooled absorption liquid is sent to the multi-layer progressive concentration type washing tower through the absorption liquid conveying device, so that the system circulation is realized.
By the aforesaid, the clean system is absorbed in washing of this scheme, including absorption unit, regeneration unit and cooling unit, the absorption unit is the gradual concentrated formula scrubbing tower structure of multilayer, and wherein every layer is an independent washing absorption unit, and it is accomplished the gradual purification to organic waste gas in proper order by the lower floor to the superiors to gas after will purifying is discharged from the top of the tower, and the absorption washing liquid of every layer is discharged extremely in proper order by the superiors to the lower floor regeneration unit is regenerated, passes through the absorption liquid after regenerating the cyclic utilization is carried out after cooling unit cools off, when overcoming traditional circulation scrubbing tower drawback, full play washing absorption liquid's advantage, furthest improves the purification efficiency of system, reduces whole running cost, extension washing liquid life.
Furthermore, the present invention also provides a washing, absorbing and purifying method, which is implemented by means of the aforementioned washing, absorbing and purifying system, wherein the system includes an absorbing unit, a regenerating unit and a cooling unit, the absorbing unit is a multi-layer progressive concentration type washing tower structure, each layer is an independent washing and absorbing unit, and the method specifically includes the following steps:
by means of the absorption unit, it is accomplished the progressive purification to organic waste gas in proper order by the lower floor to the superiors to gas after will purifying is discharged from the top of the tower, and the absorption washing liquid of each layer is discharged extremely in proper order by the upper strata to the lower floor regeneration unit is regenerated the back, passes through the absorption liquid after regenerating carry out cyclic utilization after cooling unit cools off.
In one embodiment, the multi-layer progressively concentrating wash column structure comprises:
the device comprises a washing and absorbing filler device, an absorbing tower body, a liquid level controller, an absorbing liquid replacement and supplement device, a washing liquid replacement device, an absorbing liquid replacement device, an air inlet device, a multilayer circulating spraying device and an air exhaust device.
In one embodiment, the scrubbing absorbent packing means comprises a ventilated hydrophobic deflector means and a layer of scrubbing packing.
In one embodiment, the organic waste gas passes through each washing filler layer in sequence after passing through the uniform gas distribution device from the bottom of the absorption tower, and is absorbed and purified by the absorption liquid in each washing filler layer, wherein the concentration of organic matters in the organic waste gas is reduced from bottom to top in sequence, the concentration of the absorption liquid in each washing filler layer is increased from top to bottom in sequence, the absorption liquid in the lowest layer is conveyed to the regeneration unit through the absorption liquid displacement device, and the absorption liquid in the upper layer is conveyed to the next layer through the absorption liquid displacement device in sequence.
In one embodiment, the multi-layer circulating spraying device sprays clean absorption liquid into the washing filler layer, a liquid film is formed on the surface of the washing filler layer, organic waste gas is adsorbed and purified through the liquid film of the washing filler layer, and the absorption liquid absorbing organic matters in the organic waste gas is collected into a collection tank through the ventilation hydrophobic diversion device and is discharged into a corresponding water tank of the layer.
In one embodiment, the multi-layer circulating spraying device is used for circularly spraying the absorption liquid in the water tank to the washing filler layer, and after spraying for a set time, the absorption liquid in the water tank is discharged to the next layer.
In one embodiment, the ventilation and drainage guide device comprises a rectangular ventilation and drainage guide device and a circular ventilation and drainage guide device, and the ventilation and drainage guide device comprises a ventilation hole and a water retaining groove.
In one embodiment, the absorption liquid replacement device includes: liquid level controller, filter, positive displacement pump, flowing back pipeline and valve, multilayer circulation sprinkler includes: the device comprises a filter, a spray pump, a spray circulation pipeline and a circulation adjusting valve.
In one embodiment, the regeneration unit comprises a desorption regeneration unit box body, a liquid inlet device, a heat exchange device, a liquid drainage device, a circulation device and an exhaust device, and the cooling unit is arranged at the lower part of the regeneration unit.
In one embodiment, the cooling unit includes a cooling unit housing, a liquid level controller, a heat exchanging device, a liquid draining device, and a circulating device.
By the aforesaid, the clean system is absorbed in washing of this scheme, including absorption unit, regeneration unit and cooling unit, the absorption unit is the gradual concentrated formula scrubbing tower structure of multilayer, and wherein every layer is an independent washing absorption unit, and it is accomplished the gradual purification to organic waste gas in proper order by the lower floor to the superiors to gas after will purifying is discharged from the top of the tower, and the absorption washing liquid of every layer is discharged extremely in proper order by the superiors to the lower floor regeneration unit is regenerated, passes through the absorption liquid after regenerating the cyclic utilization is carried out after cooling unit cools off, when overcoming traditional circulation scrubbing tower drawback, full play washing absorption liquid's advantage, furthest improves the purification efficiency of system, reduces whole running cost, extension washing liquid life.
It should be noted that, in the embodiment of the washing, absorbing and purifying system, the included units and modules are only divided according to the functional logic, but not limited to the above division, as long as the corresponding functions can be realized; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiment of the invention.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. Those skilled in the art will appreciate that the embodiments of the present invention are not limited to the specific embodiments described herein, and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the embodiments of the present invention. Therefore, although the embodiments of the present invention have been described in more detail through the above embodiments, the embodiments of the present invention are not limited to the above embodiments, and many other equivalent embodiments may be included without departing from the concept of the embodiments of the present invention, and the scope of the embodiments of the present invention is determined by the scope of the appended claims.
Claims (10)
1. The washing, absorbing and purifying system is characterized by comprising an absorbing unit, a regenerating unit and a cooling unit, wherein the absorbing unit is of a multilayer progressive concentrated washing tower structure, each layer is an independent washing and absorbing unit, the progressive purification of organic waste gas is completed from the lowest layer to the uppermost layer in sequence, purified gas is discharged from the top of the tower, and absorption washing liquid of each layer is discharged from the uppermost layer to the lowest layer in sequence to be regenerated by the regenerating unit, and the regenerated absorption liquid passes through the cooling unit for cooling and then recycling.
2. The scrubbing absorbing purification system according to claim 1, wherein said multi-layered progressively concentrating scrubber tower structure comprises:
the device comprises a washing and absorbing filler device, an absorbing tower body, a liquid level controller, an absorbing liquid replacement and supplement device, a washing liquid replacement device, an absorbing liquid replacement device, an air inlet device, a multilayer circulating spraying device and an air exhaust device.
3. The scrubbing absorbing and purifying system of claim 2 wherein said scrubbing absorbing packing means comprises a ventilation hydrophobic deflector and a layer of scrubbing packing.
4. The washing, absorbing and purifying system according to claim 3, wherein the organic waste gas passes through each washing and packing layer in sequence from the bottom of the absorption tower through the uniform gas distribution device, and is absorbed and purified by the absorption liquid in each washing and packing layer, wherein the concentration of organic matters in the organic waste gas is sequentially reduced from bottom to top, and the concentration of the absorption liquid in each washing and packing layer is sequentially increased from top to bottom, wherein the absorption liquid in the lowest layer is conveyed to the regeneration unit through the absorption liquid displacement device, and the absorption liquid in the upper layer is conveyed to the next layer through the absorption liquid displacement device.
5. The washing, absorbing and purifying system according to claim 3, wherein the multi-layer circulation spraying device sprays clean absorption liquid into the washing filler layer, a liquid film is formed on the surface of the washing filler layer, the organic waste gas is adsorbed and purified through the liquid film of the washing filler layer, and the absorption liquid absorbing organic matters in the organic waste gas is collected into the collection tank through the ventilation, drainage and diversion device and is discharged into the corresponding water tank of the layer.
6. The scrubbing absorbing and purifying system according to claim 5, wherein said multi-layer circulating spraying device is used for circularly spraying the absorption liquid in the water tank to said scrubbing filler layer, and after spraying for a set time, discharging the absorption liquid in the water tank to the next layer.
7. The scrubbing absorbing and purifying system of claim 3 wherein said ventilating hydrophobic deflector comprises a rectangular ventilating hydrophobic deflector and a circular ventilating hydrophobic deflector, said ventilating hydrophobic deflector comprising a vent and a water retaining trough.
8. The scrubbing absorbing and purifying system of claim 2 wherein said absorption liquid displacing means comprises: liquid level controller, filter, positive displacement pump, flowing back pipeline and valve, multilayer circulation sprinkler includes: the device comprises a filter, a spray pump, a spray circulation pipeline and a circulation adjusting valve.
9. The scrubbing, absorbing and purifying system according to any one of claims 1 to 8 wherein said regeneration unit comprises a desorption regeneration unit housing, liquid inlet means, heat exchange means, liquid discharge means, circulation means and air exhaust means, said cooling unit being disposed at a lower portion of said regeneration unit.
10. The scrubbing absorbing purification system according to any one of claims 1 to 8, wherein the cooling unit comprises a cooling unit housing, a level controller, a heat exchange means, a drain and a circulation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110742731.3A CN113426252A (en) | 2021-06-30 | 2021-06-30 | Washing, absorbing and purifying system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110742731.3A CN113426252A (en) | 2021-06-30 | 2021-06-30 | Washing, absorbing and purifying system |
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| CN113426252A true CN113426252A (en) | 2021-09-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733330A (en) * | 2022-04-20 | 2022-07-12 | 任海朝 | Energy-saving vulcanizing tower for steel plant |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114733330A (en) * | 2022-04-20 | 2022-07-12 | 任海朝 | Energy-saving vulcanizing tower for steel plant |
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