CN113082934A - Bioreactor's tail gas condensing equipment - Google Patents

Bioreactor's tail gas condensing equipment Download PDF

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Publication number
CN113082934A
CN113082934A CN202110368957.1A CN202110368957A CN113082934A CN 113082934 A CN113082934 A CN 113082934A CN 202110368957 A CN202110368957 A CN 202110368957A CN 113082934 A CN113082934 A CN 113082934A
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chamber
cavity
heat exchange
adsorption
bioreactor
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周伟
许世敏
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Luohe Medical College
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Luohe Medical College
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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
    • B01D53/002—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 condensation
    • 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
    • B01D53/02—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 adsorption, e.g. preparative gas chromatography
    • B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • C—CHEMISTRY; METALLURGY
    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
    • C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
    • C12M1/00—Apparatus for enzymology or microbiology
    • C12M1/04—Apparatus for enzymology or microbiology with gas introduction means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B3/00—Condensers in which the steam or vapour comes into direct contact with the cooling medium
    • F28B3/04—Condensers in which the steam or vapour comes into direct contact with the cooling medium by injecting cooling liquid into the steam or vapour
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28B—STEAM OR VAPOUR CONDENSERS
    • F28B9/00—Auxiliary systems, arrangements, or devices
    • F28B9/08—Auxiliary systems, arrangements, or devices for collecting and removing condensate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/50—Carbon oxides
    • B01D2257/504—Carbon dioxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
    • Y02C20/00—Capture or disposal of greenhouse gases
    • Y02C20/40—Capture or disposal of greenhouse gases of CO2

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  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
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Abstract

The invention provides a tail gas condensing device of a bioreactor, which comprises: the bioreactor comprises a tank body and a filter, wherein the tank body is connected with the bioreactor through an air inlet pipe and is connected with the filter through an air outlet pipe; further comprising: the condensation heat exchange layer, the condenser and the spraying mechanism; the box body is separated by the condensation heat exchange layer to form a first chamber and a second chamber; the first chamber is internally provided with an adsorption condensate and a buffer cavity; one end of the air inlet pipe penetrates through the condensation heat exchange layer and extends into the cache cavity; the condenser is used for introducing the adsorption condensate into the condensation heat exchange layer after refrigeration, and is used for refrigerating the tail gas; one end of the spraying mechanism is arranged in the first cavity, and the other end of the spraying mechanism extends into the second cavity; the tail gas along with the bioreactor enters the buffer cavity, the pressure in the buffer cavity can be increased, and the adsorption condensate in the first cavity is driven to be atomized and sprayed out in the second cavity through the spraying mechanism. The device can improve adsorption efficiency, and the cost is lower.

Description

Bioreactor's tail gas condensing equipment
Technical Field
The invention relates to the technical field of tail gas condensation impurity removal of a bioreactor, in particular to a tail gas condensation device of the bioreactor.
Background
Bioreactors, such as fermenters, can be used to biochemically culture in vitro using enzymes or biological functions that an organism possesses. When biochemical culture is carried out, sterile air or oxygen needs to be continuously provided for the culture solution in the bioreactor so as to meet the normal respiratory metabolism requirement of cells, and waste gas such as carbon dioxide and the like generated in the respiratory metabolism process of the cells is discharged through a tail gas pipeline.
Because the biochemical culture process needs to reach the sterile environment, a filter is also required to be assembled on the tail gas pipeline, so that bacteria in the air are prevented from flowing into the bioreactor through the tail gas pipeline in a counter-flow manner. However, when the ventilation demand is increased, the exhaust gas often contains a large amount of water vapor, and along with the extension of the culture process period, the water vapor in the exhaust gas is easy to condense in the filter, so that the filter is blocked, and meanwhile, the internal pressure in the bioreactor is increased due to the blockage of the filter, and finally culture failure is caused.
In addition, if exhaust gas such as carbon dioxide is directly discharged into the atmosphere, not only the surrounding environment is easily affected and the greenhouse effect is increased, but also the exhaust gas with high concentration may cause harm to human health. The existing waste gas treatment device is complex in process and expensive in equipment, and when the device is applied to the tail gas treatment of the bioreactor, the operation cost is increased, and the popularization and application of the biological reaction are not facilitated, so that the tail gas treatment device of the bioreactor with lower cost is needed to be provided.
Disclosure of Invention
In order to solve the above problems, an object of the present invention is to provide a tail gas condensing device for a bioreactor, which mainly refrigerates tail gas through a condensation heat exchange layer, increases pressure of a buffer cavity through accumulation of the tail gas in the buffer cavity, drives an adsorption condensate in a first cavity to be atomized and sprayed in a second cavity through a spraying mechanism, and is used for adsorbing carbon dioxide in the tail gas, so as to improve adsorption efficiency, and reduce cost.
In order to achieve the above object, the technical solution of the present invention is as follows.
An off-gas condensing unit of a bioreactor, comprising: the bioreactor comprises a box body and a filter, wherein the box body is connected with the bioreactor through an air inlet pipe and is connected with the filter through an air outlet pipe; further comprising:
the condensation heat exchange layer is arranged in the box body, and the box body is separated by the condensation heat exchange layer to form a first cavity and a second cavity; an adsorption condensate is arranged in the first cavity, and a cache cavity is arranged between the adsorption condensate and the condensation heat exchange layer; one end of the air inlet pipe penetrates through the condensation heat exchange layer and extends into the cache cavity; one side of the condensation heat exchange layer close to the air inlet pipe is provided with a plurality of air holes; the tail gas in the cache cavity can enter the second cavity through the plurality of air holes;
the condenser is arranged at one side of the box body, a liquid inlet of the condenser is connected with the first cavity through a pipeline, and a liquid outlet of the condenser is connected with a liquid inlet of the condensation heat exchange layer through a pipeline and is used for guiding the adsorption condensate in the first cavity into the condensation heat exchange layer after refrigeration; the liquid outlet of the condensation heat exchange layer is connected with the first cavity and used for discharging adsorption condensate after heat exchange into the first cavity;
the spraying mechanism is provided with one end arranged in the first cavity and extends into the adsorption condensate, and the other end penetrates through the condensation heat exchange layer and extends into the second cavity; and the tail gas of the bioreactor enters the buffer cavity, so that the pressure in the buffer cavity can be increased, and the adsorption condensate in the first cavity is driven to be atomized and sprayed out in the second cavity through the spraying mechanism.
Further, a barrier layer is arranged in the second chamber, and the second chamber is separated by the barrier layer to form a spray area and an exhaust area; the other end of the spraying mechanism extends into the spraying area; and a funnel-shaped air guide cover is arranged in the exhaust area, and the exhaust end of the air guide cover is connected with the air outlet pipe.
Furthermore, one side of the condensation heat exchange layer, which is close to the spray area, is provided with an oblique guide plate, and the height of the oblique guide plate is sequentially increased along the flowing direction of the tail gas.
Further, the thickness of one side of the condensation heat exchange layer close to the spray area is larger than that of the condensation heat exchange layer close to the exhaust area.
Further, the condensation heat exchange layer includes:
the two sides of the cylinder are fixedly connected with the inner wall of the box body; the plurality of air holes are uniformly distributed on the upper side and the lower side of the barrel;
the finned tubes are arranged in the cylinder body; and the adjacent two finned tubes are communicated with each other through a plurality of connecting pipes.
Further, the spraying mechanism includes:
one end of the spray pipe is arranged in the first cavity and extends into the adsorption condensate, and the other end of the spray pipe is arranged in the second cavity;
and the plurality of atomizing spray heads are arranged at one end of the spray pipe positioned in the second chamber.
Further, the filter includes:
one side of the filter shell is fixedly connected with the outer wall of the box body through a fixing support;
a support plate disposed within the filter housing; the bottom of the filter shell and the supporting plate are combined to form a circulating regeneration chamber, and the circulating regeneration chamber is connected with the first chamber through a first circulating pipe;
the filter plates are arranged in the filter shell and are positioned on the upper side of the supporting plate;
a gravel layer is arranged between the support plate and the adjacent filter plate; an active carbon filter layer is arranged between every two adjacent filter plates; the top of the filter shell and the adjacent filter plates are combined to form an adsorption drying cavity; an exhaust pipe is arranged on the adsorption drying cavity;
one end of the air outlet pipe extends into the gravel layer, and a plurality of microporous aeration heads are uniformly distributed on the air outlet pipe;
the first cavity is connected with the activated carbon filter layer close to one side of the adsorption drying cavity through a second circulating pipe; and a plurality of water collecting holes are uniformly distributed at one end of the second circulating pipe extending into the corresponding active carbon filtering layer.
Furthermore, the adsorption drying cavity is connected with the second cavity through a third circulating pipe; the first circulating pipe, the second circulating pipe and the third circulating pipe are all provided with control valves; and circulating pumps are arranged on the first circulating pipe and the second circulating pipe.
Furthermore, the pore diameters of a plurality of the filter plates are reduced from bottom to top in sequence.
Further, still include: the controller is arranged outside the box body, a pressure sensor is arranged in the first cavity, and an air inlet pump is arranged on the air inlet pipe; the controller is electrically connected with the air inlet pump and the pressure sensor respectively;
the controller can receive the pressure value P detected by the pressure sensorxAnd is in accordance with the set pressure value P0Carrying out comparison; when the detected pressure value PxLower than a set pressure value P0When the pressure value P in the cache cavity is increased, the controller controls the air inlet pump to be started so as to increase the pressure value P in the cache cavityx(ii) a When the detected pressure value PxIs equal to or greater than a set pressure value P0And when the air inlet pump is stopped, the controller controls the air inlet pump to be stopped.
The invention has the beneficial effects that:
1. according to the device, water vapor in the tail gas is condensed by the condensation heat exchange layer and then falls into the adsorption condensate of the first cavity, and the tail gas enters the cache cavity along with the tail gas in the bioreactor, wherein one part of the tail gas enters the second cavity through the air holes in the condensation heat exchange layer, and the other part of the tail gas is accumulated in the first cavity, so that the pressure in the cache cavity can be increased, and therefore the adsorption condensate in the first cavity can be driven to be atomized and sprayed out in the second cavity through the spraying mechanism and used for adsorbing the tail gas entering the second cavity; the adsorbed condensate falls onto the condensation heat exchange layer, flows to the side wall of the box body under the flow guiding action of the inclined flow guide plate, and flows back into the first cavity through the air holes in the side wall of the box body.
2. The condenser has the main functions that the adsorption condensate in the first cavity is refrigerated and then is led into the condensation heat exchange layer, so that a relatively low environment is kept in the condensation heat exchange layer; when tail gas passes through the condensation heat exchange layer through the gas inlet pipe, water vapor in the tail gas can be condensed and gathered in the adsorption condensate of the first cavity.
3. The invention can also carry out secondary adsorption on waste gas such as carbon dioxide in tail gas through the filter, realize the cyclic regeneration of the adsorption condensate, improve the adsorption efficiency and have lower cost.
Drawings
FIG. 1 is a schematic structural diagram of an off-gas condensing device of a bioreactor according to an embodiment of the present invention.
Fig. 2 is a schematic view of an assembly structure of the box body, the condensation heat exchange layer and the condenser in fig. 1.
Fig. 3 is a schematic structural view of the filter of fig. 1.
Fig. 4 is a wiring diagram of the control unit in the embodiment of the present invention.
Fig. 5 is a schematic view of an assembly structure of a regeneration liquid preparation tank and a filter according to an embodiment of the present invention.
In the figure: 1. a box body; 11. an air inlet pipe; 12. an air outlet pipe; 121. a microporous aeration head; 13. a first chamber; 131. caching a cavity; 14. a second chamber; 141. a spray zone; 142. an exhaust area; 15. a barrier layer; 16. a gas guide hood; 2. a filter; 21. a filter housing; 211. a cyclic regeneration chamber; 212. a gravel layer; 213. an activated carbon filter layer; 214. an adsorption drying chamber; 22. a support plate; 23. a filter plate; 24. a first circulation pipe; 25. a second circulation pipe; 251. a water collection hole; 26. a third circulation pipe; 27. a circulation pump; 28. an exhaust pipe; 3. condensing the heat exchange layer; 31. a barrel; 32. a finned tube; 33. a connecting pipe; 34. an oblique guide plate; 4. a condenser; 5. a spraying mechanism; 51. a spray tube; 52. an atomizing spray head; 6. a controller; 7. a pressure sensor; 8. an intake pump; 9. and a regenerated liquid preparation pool.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a schematic structural diagram of a tail gas condensing device of a bioreactor according to an embodiment of the present invention. This bioreactor's tail gas condensing equipment includes: the bioreactor comprises a box body 1 and a filter 2, wherein the box body 1 is connected with the bioreactor through an air inlet pipe 11, and the box body 1 is connected with the filter 2 through an air outlet pipe 12.
Referring to fig. 1 to 2, the apparatus further includes: a condensation heat exchange layer 3, a condenser 4 and a spraying mechanism 5. The condensation heat exchange layer 3 is arranged in the box body 1, and the box body 1 is separated by the condensation heat exchange layer 3 to form a first chamber 13 and a second chamber 14; the first chamber 13 is internally provided with adsorption condensate, and a buffer cavity 131 is arranged between the adsorption condensate and the condensation heat exchange layer 3; one end of the air inlet pipe 11 penetrates through the condensation heat exchange layer 3 and extends into the buffer cavity 131; one side of the condensation heat exchange layer 3 close to the air inlet pipe 11 is provided with a plurality of air holes; the exhaust gas in the buffer cavity 131 can enter the second chamber 14 through the plurality of air vents. Certainly, the purpose of the condensation heat exchange layer is to condense water vapor in the tail gas and then fall into the adsorption condensate of the first cavity; on the other hand, the two chambers are formed by separating the box body, and a micro negative pressure environment is formed in the first chamber along with the tail gas entering the first chamber, so that the adsorption of the condensate is facilitated, the spraying of the condensate in the second chamber is facilitated, and the adsorption of waste gases such as carbon dioxide in the tail gas is assisted.
The condenser 4 is arranged at one side of the box body 1, a liquid inlet of the condenser is connected with the first cavity 13 through a pipeline, and a liquid outlet of the condenser is connected with a liquid inlet of the condensation heat exchange layer 3 through a pipeline, and is used for guiding the adsorption condensate in the first cavity 13 into the condensation heat exchange layer 3 after refrigeration; the liquid outlet of the condensation heat exchange layer 3 is connected with the first chamber 13 and is used for discharging the adsorption condensate after heat exchange into the first chamber 13 to form a circulating refrigeration system. The condenser is mainly used for introducing adsorption condensate in the first cavity into the condensation heat exchange layer after refrigeration, so that a relatively low environment is kept in the condensation heat exchange layer; when tail gas passes through the condensation heat exchange layer through the gas inlet pipe, water vapor in the tail gas can be condensed and gathered in the adsorption condensate of the first cavity. Of course, valves are arranged on the liquid inlet and the liquid outlet of the condenser, and a circulating pump is arranged on a pipeline between the liquid inlet and the first cavity of the condenser.
One end of the spraying mechanism 5 is arranged in the first chamber 13 and extends into the adsorption condensate, and the other end of the spraying mechanism passes through the condensation heat exchange layer 3 and extends into the second chamber 14; as the exhaust gas from the bioreactor enters the buffer cavity 131, the pressure in the buffer cavity 131 can be increased, and the adsorption condensate in the first chamber 13 is driven to be atomized and sprayed out in the second chamber 14 by the atomizing mechanism 5. Of course, the spraying mechanism can refrigerate the sprayed adsorption condensate after passing through the condensation heat exchange layer, so that the adsorption condensate is sprayed out after being refrigerated, the adsorption of waste gas such as carbon dioxide in the tail gas is further promoted, and the adsorption effect is improved.
In the embodiment, the device mainly condenses water vapor in the tail gas through the condensation heat exchange layer and then falls into the adsorption condensate of the first cavity, and as the tail gas in the bioreactor enters the cache cavity, one part of the tail gas enters the second cavity through the air holes in the condensation heat exchange layer, and the other part of the tail gas is accumulated in the first cavity, the pressure in the cache cavity can be increased, so that the adsorption condensate in the first cavity can be driven to be atomized and sprayed out in the second cavity through the spraying mechanism and used for adsorbing the tail gas entering the second cavity; the adsorbed condensate falls onto the condensation heat exchange layer, flows to the side wall of the box body under the flow guiding action of the inclined flow guide plate, and flows back into the first cavity through the air holes in the side wall of the box body.
Referring to fig. 2 again, a barrier layer 15 is disposed in the second chamber 14, and the second chamber 14 is partitioned by the barrier layer 15 to form a spray area 141 and an exhaust area 142; the other end of the spraying mechanism 5 extends into the spraying area 141; a funnel-shaped air guide hood 16 is arranged in the exhaust area 142, and the exhaust end of the air guide hood 16 is connected with the outlet pipe 12. The size of the air inlet end of the air guide cover is matched with that of the exhaust area, so that the air in the exhaust area enters the air outlet pipe after passing through the air guide cover. Specifically, the side of the condensation heat exchange layer 3 close to the spray area 141 is provided with an oblique deflector 34, and the heights of the oblique deflectors 34 are sequentially increased along the flowing direction of the exhaust gas. Therefore, the adsorbed condensate can flow to the side edge of the box body along the oblique guide plate and return to the first cavity through the air holes on the side edge of the condensation heat exchange layer. The flow direction of the adsorbed condensate on the oblique guide plate is opposite to the flow direction of the tail gas.
Referring to fig. 2 again, the thickness of the side of the condensing heat exchange layer 3 near the spray area 141 is greater than the thickness of the side near the exhaust area 142. The spraying mechanism 5 is mainly arranged on the relatively thick side of the condensation heat exchange layer and is helpful for refrigerating the adsorbed condensate in the spraying mechanism.
The condensation heat exchange layer 3 includes: a cylinder 31 and a plurality of fin tubes 32. Wherein, both sides of the cylinder 31 are fixedly connected with the inner wall of the box body 1; a plurality of air holes are uniformly distributed on the upper side and the lower side of the cylinder body 31; the finned tubes 32 are arranged in the cylinder body 31; and the adjacent two finned tubes 32 are communicated with each other through a plurality of connecting pipes 33. Of course, the adjacent finned tubes are provided with ventilation gaps and are combined with ventilation holes distributed on the upper side and the lower side of the cylinder body 31 to form ventilation channels, so that the tail gas in the first cavity can enter the second cavity through the ventilation channels.
Referring again to fig. 2, the spraying mechanism 5 includes: a spray pipe 51 and a plurality of atomizer heads 52. Wherein, one end of the spray pipe 51 is arranged in the first chamber 13 and extends into the adsorption condensate, and the other end is arranged in the second chamber 14; a plurality of atomising nozzles 52 are provided at one end of the spray pipe 51 within the second chamber 14. Therefore, with the increase of the pressure in the first chamber, the adsorption condensate in the first chamber is promoted to enter the second chamber through the spraying pipe, and the adsorption condensate is sprayed out of the second chamber by the plurality of atomizing nozzles and is used for carrying out spray adsorption on waste gases such as carbon dioxide in tail gas.
Referring to fig. 1, 3 and 5, the filter 2 includes: a filter housing 21, and a support plate 22 and a number of filter plates 23 located within the filter housing 21. Wherein, one side of the filter housing 21 is fixedly connected with the outer wall of the box body 1 through a fixing bracket.
The support plate 22 is disposed inside the filter housing 21; and the bottom of the filter housing 21 is combined with the support plate 22 to form a circulation regeneration chamber 211, and the circulation regeneration chamber 211 is connected to the first chamber 13 through the first circulation pipe 24; the cyclic regeneration chamber is used primarily for the regeneration of the adsorption condensate.
The filter plates 23 are sequentially arranged in the filter shell 21 and positioned on the upper side of the support plate 22; specifically, the pore diameters of the plurality of filter plates 23 are sequentially reduced from bottom to top. The filter shell is sequentially separated by the filter plates from bottom to top to form a gravel layer, a multi-stage active carbon filter layer and an adsorption drying layer. The particle sizes of the active carbon particles in the multistage active carbon filter layers are sequentially reduced from bottom to top. Of course, the number of the activated carbon filter layers can be 2, 3 or more than 3, and is mainly determined according to the filtering condition of the adsorption condensate flowing back into the first chamber. Wherein, a gravel layer 212 is arranged between the support plate 22 and the adjacent filter plate 23; an active carbon filter layer 213 is arranged between two adjacent filter plates 23; the top of the filter housing 21 in combination with its adjacent filter plates 23 forms an adsorption drying chamber 214. The adsorption drying chamber 214 is provided with an exhaust pipe 28 for exhausting the dried tail gas.
One end of the air outlet pipe 12 extends into the gravel layer 212, and a plurality of microporous aeration heads 121 are uniformly distributed on the air outlet pipe; and the plurality of micro-porous aeration heads 121 are all arranged towards the cyclic regeneration chamber 211. Thereby, on the one hand, the flow velocity of the exhaust gas in the gas outlet pipe is reduced, and on the other hand, the contact reaction of the tail gas and the regenerated adsorption condensate is facilitated.
The cyclic regeneration chamber 211 is connected to the first chamber 13 by a first circulation pipe 24; the first chamber 13 is connected with the activated carbon filter layer 213 near the side of the adsorption drying chamber 214 through the second circulation pipe 25; and a plurality of water collecting holes 251 are uniformly distributed on one end of the second circulation pipe 25 extending into the corresponding activated carbon filter layer 213. And the filtered adsorption condensate flows back to the first chamber through the water collecting hole. The adsorption drying chamber 214 is connected with the second chamber 14 through the third circulation pipe 26; the first circulation pipe 24, the second circulation pipe 25 and the third circulation pipe 26 are all provided with control valves; the first circulation pipe 24 and the second circulation pipe 25 are provided with circulation pumps 27.
In this embodiment, the adsorption condensate is sodium base, the main component of which is NaOH, and possibly some NaHCO may be doped3And Na2CO3(ii) a The circulating regeneration chamber is internally provided with regeneration liquid, and the main components of the regeneration liquid are Ca (OH)2. Firstly, preparing regenerated liquid, namely lime slurry, by a regenerated liquid preparation pool 9; the prepared lime slurry is then directed into a recycle regeneration chamber.
And then the adsorption condensate after multiple times of adsorption in the first chamber enters the circulating regeneration chamber through the first circulating pipe and reacts with the lime slurry in the circulating regeneration chamber:
2NaHCO3+Ca(OH)2→CaCO3↓+Na2CO3+2H2O；
Na2CO3+Ca(OH)2→CaCO3↓+NaOH；
therefore, sodium alkali is regenerated, filtered by the multistage active carbon and then reflowed into the first cavity to be continuously used for adsorbing CO in the tail gas2。
And tail gas enters the gravel layer through the air outlet pipe, contacts with the regenerated adsorption condensate again, can further carry out adsorption reaction with the tail gas that does not remove completely, improves the clearance of waste gas such as carbon dioxide in the tail gas. Then the dried mixture is discharged after passing through an adsorption drying cavity. The adsorption drying cavity is filled with a filter cotton layer and drying agent particles for removing water vapor in the tail gas. Wherein, the desiccant particles can be any one of silica gel, molecular sieve, active carbon, anhydrous calcium chloride, anhydrous magnesium sulfate and the like. The whole process mainly consumes lime slurry and supplements a small amount of sodium alkali, and the cost of the lime slurry is lower, so that the device can reduce the cost while improving the adsorption efficiency.
Of course, in other embodiments, the apparatus further comprises: a controller 6 and a pressure sensor 7. Referring to fig. 1 and 4, the controller 6 is disposed outside the box body 1, the pressure sensor 7 is disposed in the first chamber 13, and the intake pump 8 is disposed on the intake pipe 11; the controller 6 is respectively electrically connected with the air inlet pump 7 and the pressure sensor 7; wherein the controller 6 is capable of receiving a pressure value P detected by the pressure sensor 7xAnd is in accordance with the set pressure value P0Carrying out comparison; when the detected pressure value PxLower than a set pressure value P0In the meantime, the controller 6 controls the intake pump 8 to start up to increase the pressure P in the buffer cavity 131x(ii) a When the detected pressure value PxIs equal to or greater than a set pressure value P0At this time, the controller 6 controls the intake pump 8 to be suspended. Therefore, by controlling the pressure in the first chamber, the adsorption condensate in the first chamber is facilitated to enter the second chamber through the spraying mechanism 5, and is atomized and sprayed out in the second chamber.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. An off-gas condensing unit of a bioreactor, comprising: the device comprises a box body (1) and a filter (2), wherein the box body (1) is connected with a bioreactor through an air inlet pipe (11), and the box body (1) is connected with the filter (2) through an air outlet pipe (12); it is characterized by also comprising:
the condensation heat exchange layer (3) is arranged in the box body (1), and the box body (1) is separated by the condensation heat exchange layer (3) to form a first chamber (13) and a second chamber (14); an adsorption condensate is arranged in the first chamber (13), and a buffer cavity (131) is arranged between the adsorption condensate and the condensation heat exchange layer (3); one end of the air inlet pipe (11) penetrates through the condensation heat exchange layer (3) and extends into the cache cavity (131); one side of the condensation heat exchange layer (3) close to the air inlet pipe (11) is provided with a plurality of air holes; tail gas in the buffer cavity (131) can enter the second chamber (14) through the plurality of air holes;
the condenser (4) is arranged at one side of the box body (1), a liquid inlet of the condenser is connected with the first cavity (13) through a pipeline, a liquid outlet of the condenser is connected with a liquid inlet of the condensation heat exchange layer (3) through a pipeline, and the condenser is used for guiding adsorption condensate in the first cavity (13) into the condensation heat exchange layer (3) after refrigeration; a liquid outlet of the condensation heat exchange layer (3) is connected with the first cavity (13) and is used for discharging adsorption condensate after heat exchange into the first cavity (13);
a spraying mechanism (5) with one end arranged in the first chamber (13) and extending into the adsorption condensate and the other end passing through the condensation heat exchange layer (3) and extending into the second chamber (14); as the tail gas of the bioreactor enters the buffer cavity (131), the pressure in the buffer cavity (131) can be increased, and the adsorption condensate in the first chamber (13) is driven to be atomized and sprayed out in the second chamber (14) through the spraying mechanism (5).
2. The bioreactor off-gas condensing unit according to claim 1, characterized in that a barrier layer (15) is provided in the second chamber (14), and the second chamber (14) is separated by the barrier layer (15) to form a spraying area (141) and a venting area (142); the other end of the spraying mechanism (5) extends into the spraying area (141); a funnel-shaped air guide cover (16) is arranged in the exhaust area (142), and the exhaust end of the air guide cover (16) is connected with the air outlet pipe (12).
3. The device for condensing off-gas of a bioreactor according to claim 2, wherein the side of the condensation heat exchange layer (3) close to the spray zone (141) is provided with an oblique deflector (34), and the height of the oblique deflector (34) increases in sequence along the flow direction of the off-gas.
4. The bioreactor off-gas condensing unit according to claim 2, characterized in that the thickness of the side of the condensing heat exchange layer (3) close to the spraying zone (141) is greater than the thickness of the side close to the exhaust zone (142).
5. The bioreactor off-gas condensing device according to claim 1, characterized in that said condensing heat exchange layer (3) comprises:
the two sides of the cylinder (31) are fixedly connected with the inner wall of the box body (1); the plurality of air holes are uniformly distributed on the upper side and the lower side of the barrel body (31);
the finned tubes (32) are arranged in the cylinder body (31); and the adjacent two finned tubes (32) are communicated with each other through a plurality of connecting pipes (33).
6. The bioreactor off-gas condensing device according to claim 1, characterized in that said spraying means (5) comprises:
a spray pipe (51) having one end disposed in the first chamber (13) and extending into the adsorption condensate and the other end disposed in the second chamber (14);
and the plurality of atomizing spray heads (52) are arranged at one end of the spraying pipe (51) positioned in the second chamber (14).
7. The bioreactor off-gas condensing device according to claim 1, characterized in that said filter (2) comprises:
a filter housing (21) having one side fixedly connected to an outer wall of the case (1) by a fixing bracket;
a support plate (22) disposed within the filter housing (21); the bottom of the filter housing (21) and the support plate (22) are combined to form a circulating regeneration chamber (211), and the circulating regeneration chamber (211) is connected with the first chamber (13) through a first circulating pipe (24);
the filter plates (23) are arranged in the filter shell (21) and are positioned on the upper side of the supporting plate (22);
a gravel layer (212) is arranged between the support plate (22) and the adjacent filter plate (23); an active carbon filter layer (213) is arranged between two adjacent filter plates (23); the top of the filter shell (21) is combined with the adjacent filter plates (23) to form an adsorption drying chamber (214); an exhaust pipe (28) is arranged on the adsorption drying cavity (214);
one end of the air outlet pipe (12) extends into the gravel layer (212), and a plurality of microporous aeration heads (121) are uniformly distributed on the air outlet pipe;
the first chamber (13) is connected with an activated carbon filter layer (213) close to one side of the adsorption drying cavity (214) through a second circulating pipe (25); and a plurality of water collecting holes (251) are uniformly distributed on one end of the second circulating pipe (25) extending into the corresponding active carbon filtering layer (213).
8. The bioreactor off-gas condensing unit according to claim 7, characterized in that said sorption drying chamber (214) is connected to said second chamber (14) by a third circulation duct (26); control valves are arranged on the first circulating pipe (24), the second circulating pipe (25) and the third circulating pipe (26); and circulating pumps (27) are arranged on the first circulating pipe (24) and the second circulating pipe (25).
9. The bioreactor off-gas condensing device according to claim 7, wherein the pore diameters of the plurality of filter plates (23) are sequentially decreased from bottom to top.
10. The bioreactor off-gas condensing device of claim 1, further comprising: the controller (6) is arranged outside the box body (1), a pressure sensor (7) is arranged in the first chamber (13), and an air inlet pump (8) is arranged on the air inlet pipe (11); the controller (6) is respectively electrically connected with the air inlet pump (7) and the pressure sensor (7);
the controller (6) can receive the pressure value P detected by the pressure sensor (7)xAnd is in accordance with the set pressure value P0Carrying out comparison; when the detected pressure value PxLower than a set pressure value P0When the pressure value P in the buffer cavity (131) is increased, the controller (6) controls the air inlet pump (8) to be started so as to increase the pressure value P in the buffer cavity (131)x(ii) a When in useDetected pressure value PxIs equal to or greater than a set pressure value P0And when the air inlet pump (8) is stopped, the controller (6) controls the air inlet pump (8) to be stopped.
CN202110368957.1A 2021-04-06 2021-04-06 Bioreactor's tail gas condensing equipment Pending CN113082934A (en)

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CN202110368957.1A CN113082934A (en) 2021-04-06 2021-04-06 Bioreactor's tail gas condensing equipment

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CN113916022A (en) * 2021-11-25 2022-01-11 王斯武 Rotary type tail gas condensing machine for bioreactor
CN116532241A (en) * 2023-05-16 2023-08-04 宁波天秦自动化设备有限公司 High-temperature oil smoke waste gas treatment system and treatment method

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