CN110898601A - Rich ammonia tail gas filtration system of high-purity ammonia mill - Google Patents
Rich ammonia tail gas filtration system of high-purity ammonia mill Download PDFInfo
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- CN110898601A CN110898601A CN201811088615.9A CN201811088615A CN110898601A CN 110898601 A CN110898601 A CN 110898601A CN 201811088615 A CN201811088615 A CN 201811088615A CN 110898601 A CN110898601 A CN 110898601A
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- 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
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- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
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- 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
- B01D53/1406—Multiple stage absorption
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- 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
- B01D53/1418—Recovery of products
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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
- B01D53/1431—Pretreatment by other processes
- B01D53/145—Pretreatment by separation of solid or liquid material
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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
- B01D53/18—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
- 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
- B01D53/24—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 centrifugal force
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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
- B01D2257/40—Nitrogen compounds
- B01D2257/406—Ammonia
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Abstract
The invention provides an ammonia-rich tail gas filtering system of a high-purity ammonia plant, which comprises a first pipeline and an induced draft fan, wherein the induced draft fan is installed on the first pipeline, one end of the first pipeline is fixedly connected with an outlet of ammonia-rich tail gas, the other end of the first pipeline is fixedly connected with a condensing system, an outlet of the condensing system is fixedly connected with a pretreatment system, an outlet end of the pretreatment system is fixedly connected with a tail gas filtering system, and an outlet end of the tail gas filtering system is fixedly connected with a gas discharge pipeline. The invention overcomes the defects of the prior art, has reasonable design and compact structure, has better absorption effect by condensing the tail gas rich in ammonia, pretreating and spraying and absorbing the tail gas by the absorption liquid, can achieve the safe emission of the tail gas, and simultaneously, the absorption liquid absorbs ammonia gas to obtain ammonia water with certain concentration for production and reuse.
Description
Technical Field
The invention relates to the technical field of tail gas filtration treatment, in particular to an ammonia-rich tail gas filtration system for a high-purity ammonia plant.
Background
In modern industrial production, enterprises use liquid ammonia more and more, high-concentration ammonia-containing tail gas is generated in the process of using the liquid ammonia, if the tail gas is not treated and is directly discharged into the air to pollute the air, two methods for treating the ammonia-rich tail gas are commonly used in the production process, one method is to absorb ammonia in the waste gas by sulfuric acid to form ammonium sulfate, but the ammonia sulfate needs to be treated again, the production cost is high, the second method is to absorb the ammonia gas through water spraying, however, ammonia gas is mainly generated by high-temperature baking, and the ammonia gas contains part of dust particles and water vapor, which can affect the absorption of tail gas if not removed, the absorption liquid is difficult to contact with gas uniformly in the spraying absorption process, so that the absorption effect is influenced, and the ammonia gas is not completely removed, so that the filtering system for the ammonia-rich tail gas of the high-purity ammonia plant is provided.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an ammonia-rich tail gas filtering system for a high-purity ammonia plant, which overcomes the defects of the prior art, has reasonable design and compact structure, has better absorption effect by condensing the ammonia-rich tail gas, pretreating and spraying and absorbing the ammonia-rich tail gas by using an absorption liquid, can achieve the safe emission of the tail gas, and can obtain ammonia water with certain concentration for production and reuse by using the absorption liquid to absorb the ammonia gas.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
an ammonia-rich tail gas filtering system of a high-purity ammonia plant comprises a first pipeline and an induced draft fan, wherein the induced draft fan is installed on the first pipeline, one end of the first pipeline is fixedly connected with an outlet of ammonia-rich tail gas, the other end of the first pipeline is fixedly connected with a condensing system, an outlet of the condensing system is fixedly connected with a pretreatment system, an outlet end of the pretreatment system is fixedly connected with a tail gas filtering system, and an outlet end of the tail gas filtering system is fixedly connected with a gas discharge pipeline;
the condensation system comprises a condenser body, a heat exchange tube, a coolant liquid inlet tube, a coolant liquid outlet tube, a drain tube and a condensate water collecting box, wherein a tail gas inlet and a tail gas outlet are respectively arranged at the left side and the right side of the condenser body, the side wall of the tail gas inlet of the condenser body is provided with an external thread, one end of the first pipeline close to the tail gas inlet is fixedly connected with a nut, the nut is matched with the external thread, the two sides of the upper end of the condenser body are respectively and fixedly connected with the coolant liquid inlet tube and the coolant liquid outlet tube, the lower end of the coolant liquid inlet tube penetrates through the upper side wall of the condenser body to reach the inner cavity of the condenser body and is fixedly connected with the inlet of the heat exchange tube, the lower end of the coolant liquid outlet tube penetrates through the upper side wall of the condenser, the condenser is characterized in that one end of a first water drainage pipe is fixedly connected to the lower end of the condenser body, and the other end of the first water drainage pipe penetrates through the lower end of the condenser body to reach the outer cavity of the condenser body and is fixedly connected with a condensed water collecting box.
Preferably, the pretreatment system comprises an air suction pipeline, a blower, a pretreatment box, a rotary fan, a sieve plate and a second drain pipe, one end of the air suction pipeline is fixedly connected with the outlet end of the condensation system, and the other end of the air suction pipeline penetrates through the side wall of the pretreatment tank to reach the inner cavity of the pretreatment tank and is fixedly connected with the air inlet end of the blower, the air outlet end of the blower is connected with an air outlet pipe which is positioned in the inner cavity of the pretreatment tank, the inner side wall of the pretreatment tank is fixedly connected with a sieve plate, the lower end of the pretreatment tank is fixedly connected with one end of a second drain pipe, the other end of the second drain pipe is fixedly connected with a condensed water collecting box, the inner top wall of the pretreatment box is provided with a rotary fan through a fixing piece, and the rotary fan is positioned above the sieve plate, and the upper end of the pretreatment tank is fixedly connected with the inlet end of the tail gas filtering system through a second pipeline.
Preferably, the tail gas filtration system includes tail gas filtration absorption module, sprays absorbing device and absorption liquid circulation case, the tail gas filtration absorption module is the two-stage absorption tower series connection, the absorption tower includes first absorption tower and second absorption tower, and the lower extreme lateral wall of the upper end lateral wall of first absorption tower through connecting tube connection second absorption tower, the upper end lateral wall and the gas emission pipeline fixed connection of second absorption tower, the equal fixedly connected with in upper end of first absorption tower and second absorption tower sprays absorbing device, and the lower extreme of first absorption tower and second absorption tower all connects the absorption liquid circulation case through connecting tube, absorption liquid circulation case passes through backflow pipeline and sprays absorbing device fixed connection, and the centrifugal pump is installed to backflow pipeline's inside wall.
Preferably, the spraying and absorbing device comprises an absorbing liquid storage box, a motor, a rotating shaft, a driving gear, a driven gear, a gear ring, a nozzle mounting plate and an atomizing nozzle, the upper end of the absorbing liquid storage box is fixedly connected with the inner top wall of the absorbing tower, the upper end of the absorbing tower is fixedly connected with the motor through a bracket, the output end of the motor is fixedly connected with the rotating shaft, the other end of the rotating shaft penetrates through the upper end of the absorbing liquid storage box to reach the inner cavity of the absorbing liquid storage box and is fixedly sleeved with the driving gear, the driving gear is meshed with a plurality of driven gears, one ends of the driven gears, far away from the driving gear, are respectively meshed with the teeth on the inner side wall of the gear ring, the outer side wall of the gear ring is fixedly connected with the inner side wall of the absorbing liquid storage box, the spray head mounting plate is of a convex structure, the upper end of the spray head mounting plate is rotatably connected with the inner side wall of the absorption liquid storage tank, and the lower end of the spray head mounting plate is located in an outer cavity of the absorption liquid storage tank.
Preferably, the inside wall of second pipeline is connected with the filter screen, and the mesh diameter of filter screen is less than 1 mm.
Preferably, the first drain pipe is arranged at the tail gas outlet close to the condenser body.
Preferably, an ammonia water concentration detector is mounted on the side wall of the absorption liquid circulating box.
Preferably, the gas discharge pipeline is provided with an exhaust fan and an ammonia concentration detector.
(III) advantageous effects
The embodiment of the invention provides a system for filtering ammonia-rich tail gas of a high-purity ammonia plant. The method has the following beneficial effects:
1. the user of service lets in the coolant liquid through condensate feed liquor pipe in to the heat-transfer pipe, and during high temperature tail gas got into the condenser body simultaneously, the partial gas liquefaction drips and goes in the bottom of condenser body via drain pipe drainage to the comdenstion water collecting box, makes the temperature of tail gas reduce simultaneously, conveniently carries out subsequent processing.
2. Tail gas after the cooling passes through the air-blower entering preliminary treatment incasement portion, and rotatory fan rotates, drives the high-speed rotation of preliminary treatment incasement portion air, and large granule dust and unnecessary moisture in the tail gas fall into sieve and comdenstion water collection box under the effect of centrifugal force and go, avoid dust impurity to the absorptive influence of tail gas.
3. The tail gas filtration system adopts multistage absorption tower to establish ties, and the absorption effect is better, and sprays absorbing device in the absorption tower and make the absorption liquid spray at the absorption tower internal rotation, and the scope of spraying is wider, and is more abundant with rich ammonia tail gas contact, and the absorption effect is better.
4. The absorption liquid circulation case can be used under the effect of centrifugal pump circulation, absorbs rich ammonia tail gas, and the liquid in the absorption liquid circulation case becomes the aqueous ammonia of certain concentration after used repeatedly a period, can supply the enterprise to reuse.
5. Install exhaust fan and ammonia concentration detector on the gas emission pipeline in proper order, can discharge the tail gas after will handling through the exhaust fan in the air, whether ammonia concentration detector can real-time supervision discharges in the tail gas still contains the ammonia simultaneously.
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 the drawings without creative efforts.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic diagram of the condensing system of the present invention;
FIG. 3 is a schematic diagram of the pretreatment system of the present invention;
FIG. 4 is a schematic view of the tail gas filtration system of the present invention;
FIG. 5 is a schematic view of the spray absorption device according to the present invention;
FIG. 6 is a schematic view of the structure A-A of the present invention;
in the figure: the device comprises a first pipeline 1, an induced draft fan 2, a condensing system 3, a condenser body 31, a heat exchange pipe 32, a cooling liquid inlet pipe 33, a cooling liquid outlet pipe 34, a first water discharge pipe 35, a condensed water collecting box 36, a pretreatment system 4, an air suction pipeline 41, an air blower 42, a pretreatment box 43, a rotary fan 44, a sieve plate 45, a second water discharge pipe 46, a tail gas filtering system 5, a tail gas filtering and absorbing module 51, a first absorption tower 511, a second absorption tower 512, a spray absorption device 52, an absorption liquid storage box 521, a motor 522, a rotary shaft 523, a driving gear 524, a driven gear 525, a gear ring 526, a nozzle mounting plate 527, an atomizing nozzle 528, an absorption liquid circulating box 53, a gas discharge pipeline 6, an ammonia concentration detector 7 and an ammonia concentration detector 8.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present 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.
A filtering system 5 for ammonia-rich tail gas of a high-purity ammonia plant comprises a first pipeline 1 and an induced draft fan 2, wherein the induced draft fan 2 is installed on the first pipeline 1, one end of the first pipeline 1 is fixedly connected with an outlet of the ammonia-rich tail gas, and the other end of the first pipeline 1 is fixedly connected with a condensing system 3, ammonia-rich tail gas generated in the production process enters the condensing system 3 through the first pipeline 1 for condensation, the temperature of tail gas with higher temperature is controlled below 40 ℃, an outlet of the condensing system 3 is fixedly connected with a pretreatment system 4, the dust and the redundant moisture in the condensed tail gas are treated, so that the tail gas can be conveniently absorbed and treated subsequently, the outlet end of the pretreatment system 4 is fixedly connected with a tail gas filtering system 5, the outlet end of the tail gas filtering system 5 is fixedly connected with a gas discharge pipeline 6, and the ammonia-rich tail gas is condensed, pretreated and filtered and then can be introduced into the air through the gas discharge pipeline 6;
the condensing system 3 comprises a condenser body 31, a heat exchange pipe 32, a coolant liquid inlet pipe 33, a coolant liquid outlet pipe 34, a first drain pipe 35 and a condensate water collecting tank 36, wherein a tail gas inlet and a tail gas outlet are respectively arranged at the left side and the right side of the condenser body 31, an external thread is arranged on the side wall of the tail gas inlet of the condenser body 31, a nut is fixedly connected to one end, close to the tail gas inlet, of the first pipeline 1 and matched with the external thread, a user aligns the nut with the tail gas inlet end, the first pipeline 1 and the tail gas inlet can be fixedly connected by rotating the nut, high-temperature tail gas can be ensured to completely enter the condenser body 31, cooling liquid is introduced into the heat exchange pipe 32 through the coolant liquid inlet pipe 33, high-temperature tail gas flows into the condenser body 31 from the tail gas inlet, when the heat exchange pipe 32 filled with coolant inside is encountered, part of water vapor contained, flows into the condensed water collection tank 36 through the first drain pipe 35, and the temperature of the remaining gas is lowered by the heat exchange pipe 32.
The pretreatment system 4 comprises an air suction pipeline 41, an air blower 42, a pretreatment tank 43, a rotary fan 44, a sieve plate 45 and a second drain pipe 46, one end of the air suction pipeline 41 is fixedly connected with the outlet end of the condensation system 3, the other end of the air suction pipeline 41 penetrates through the side wall of the pretreatment tank 43 to reach the inner cavity of the pretreatment tank 43 and the air inlet end of the air blower 42, the air outlet end of the air blower 42 is connected with an air outlet pipe, the air outlet pipe is positioned in the inner cavity of the pretreatment tank 43, the sieve plate 45 is fixedly connected with the inner side wall of the pretreatment tank 43, the lower end of the pretreatment tank 43 is fixedly connected with one end of the second drain pipe 46, the other end of the second drain pipe 46 is fixedly connected with the condensed water collecting tank 36, the rotary fan 44 is installed on the inner top wall of the pretreatment tank 43 through a fixing part, the rotary fan 44 is positioned above the sieve plate 45, the air blower 42 sucks the condensed, the high-speed rotation of rotatory fan 44 in the preliminary treatment case 43 drives tail gas high-speed rotatory, and the large granule dust in the tail gas and partial residual moisture drop to sieve 45 under the effect of centrifugal force on, tail gas goes into tail gas filtration system 5 through the second pipeline of preliminary treatment case 43 upper end and tail gas filtration system 5's entrance point fixed connection simultaneously, sends into gas in the tail gas filtration system 5.
The tail gas filtering system 5 comprises a tail gas filtering and absorbing module 51, a spraying absorbing device 52 and an absorbing liquid circulating box 53, the tail gas filtering and absorbing module 51 is formed by connecting two stages of absorbing towers in series, each absorbing tower comprises a first absorbing tower 511 and a second absorbing tower 512, the upper end side wall of the first absorbing tower 511 is connected with the lower end side wall of the second absorbing tower 512 through a connecting pipeline, the upper end side wall of the second absorbing tower 512 is fixedly connected with a gas discharge pipeline 6, the two stages of absorbing towers are connected in series to effectively remove ammonia components in tail gas completely, the spraying absorbing devices 52 are fixedly connected with the upper ends of the first absorbing tower 511 and the second absorbing tower 512, the spraying absorbing devices 52 spray absorbing liquid from top to bottom, the ammonia-rich tail gas moves upwards from the bottom end of the absorbing towers to ensure that the absorbing liquid fully absorbs the ammonia in the tail gas, and the lower ends of the first absorbing tower 511 and the second absorbing tower 512 are connected with the absorbing liquid circulating box 53 through connecting pipelines, absorption liquid circulation case 53 passes through return line and sprays absorbing device 52 fixed connection, and the inside wall of return line installs the centrifugal pump, and absorption liquid circulation case 53 can be taken out the liquid in absorption liquid circulation case 53 under the effect of centrifugal pump and go in spraying absorbing device 52, and repeated absorption can take out the aqueous ammonia when the aqueous ammonia of absorption liquid becomes certain concentration, can supply industrial production to use.
The spray absorption device 52 comprises an absorption liquid storage tank 521, a motor 522, a rotating shaft 523, a driving gear 524, a driven gear 525, a gear ring 526, a spray head mounting plate 527 and an atomization spray head 528, wherein the upper end of the absorption liquid storage tank 521 is fixedly connected with the inner top wall of an absorption tower, the upper end of the absorption tower is fixedly connected with the motor 522 through a bracket, the output end of the motor 522 is fixedly connected with the rotating shaft 523, the other end of the rotating shaft 523 penetrates through the upper end of the absorption liquid storage tank 521 to reach the inner cavity of the absorption liquid storage tank 521 and is fixedly sleeved with the driving gear 524, the driving gear 524 is meshed with a plurality of driven gears 525, one ends of the driven gears 525 far away from the driving gear 524 are respectively meshed with teeth of the inner side wall 526 of the gear ring, the outer side wall of the gear 526 is fixedly connected with the inner side wall of the, and the bottom through connection of shower nozzle mounting panel 527 has a plurality of atomizer 528, shower nozzle mounting panel 527 is the convex structure, the upper end of shower nozzle mounting panel 527 rotates at the inside wall of absorption liquid storage tank 521 to be connected, the lower extreme of shower nozzle mounting panel 527 is located the exocoel of absorption liquid storage tank 521, motor 522 works, drive driving gear 524 and rotate, driven gear 525 is rotatory along the inboard of ring gear 526, it is rotatory to drive shower nozzle mounting panel 527, atomizer 528 of shower nozzle mounting panel 527 lower extreme sprays in the inner chamber of absorption tower in a rotating manner, make absorption liquid and tail gas contact more evenly, the absorption effect is better.
The motor 522, the induced draft fan 2, the blower 42, the rotary fan 44, the exhaust fan and the external power supply form a series circuit together through wires.
The inside wall of second pipeline is connected with the filter screen, and the mesh diameter of filter screen is less than 1mm, and among the pretreatment process, the dust of large granule still contains some dust of small granule in the tail gas on sieve 45 in the effect whereabouts of centrifugal force, filters the dust of small granule in with the tail gas through the filter screen, and wherein the filter screen is detachable with the second pipeline to be connected, when the more tail gas movement of hindrance of dust on the filter screen, can change new filter screen.
The first water drainage pipe 35 is arranged at a tail gas outlet close to the condenser body 31, and can collect excessive moisture in the tail gas into the condensed water collection box 36 to the maximum extent after condensation.
Ammonia water concentration detector 8 is installed to the lateral wall of absorption liquid circulation case 53, and ultrapure water is selected to the absorption liquid, forms the aqueous ammonia behind the ammonia effect in absorption liquid and the tail gas, and aqueous ammonia concentration detector 8 can detect the concentration of aqueous ammonia, can regard as the aqueous ammonia of industrial use after aqueous ammonia concentration reachs certain degree, supplies the production to reuse, improves the productivity effect.
Install exhaust fan and ammonia concentration detector 7 on the gas emission pipeline 6 in proper order, the exhaust fan is during the tail gas exhaust after will handling the air, and whether ammonia concentration detector 7 still contains the ammonia in detecting exhaust gas, makes things convenient for the user to observe.
As shown in fig. 1-6, the working principle of the ammonia-rich tail gas filtering system of the high-purity ammonia plant is as follows:
the ammonia-rich tail gas generated in industrial production enters the condenser body 31 through the first pipeline 1, the cooling liquid is introduced into the heat exchange tube 32 in the condenser, and as the temperature of the tail gas is higher and the tail gas contains partial water vapor, when the tail gas passes through the surface of the heat exchange pipe 32, part of the water vapor is condensed and then drops into a condensed water collecting box 36 through a first drain pipe 35, the temperature of the tail gas is also reduced under the action of the heat exchange pipe 32, the cooled tail gas enters the pretreatment tank 43 through the action of the blower 42, meanwhile, the high-speed rotation of the rotary fan 44 in the pretreatment tank 43 can drive the tail gas to rotate at a high speed, the large-particle dust in the tail gas falls into the upper end of the sieve plate 45 under the action of centrifugal force, residual water vapor in the tail gas also falls into the condensed water collecting box 36 under the action of centrifugal force, and the tail gas flows into the tail gas filtering system 5 through a second pipeline;
in the tail gas filtering system 5, the power is switched on, the motor 522 is started to drive the driving gear 524 to rotate, the driving gear 524 is meshed with the driven gear 525, the driven gear 525 rotates in the gear ring 526, the driving gear 524 and the driven gear 525 rotate and simultaneously drive the upper end of the spray head mounting plate 527 to rotate in the absorption liquid storage tank 521, the atomizing spray head 528 rotates along with the rotation of the spray head mounting plate 527, the atomizing spray head is sprayed in the absorption liquid storage tank 521 in a rotating manner, the tail gas moves from bottom to top, the absorption liquid sprays from top to bottom in a rotating manner, the tail gas can be ensured to be contacted with the absorption liquid for a longer time and in a larger area, the absorption liquid falls into the absorption liquid circulating tank 53 after being sprayed, the absorption liquid continues to be conveyed into the absorption liquid storage tank 521 to be sprayed again under the action of the centrifugal pump until the concentration of the ammonia water in, and tail gas meeting the emission standard is discharged from the gas discharge pipeline.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. The utility model provides a rich ammonia tail gas filtration system of high-purity ammonia mill, includes first pipeline and draught fan, install draught fan, its characterized in that on the first pipeline: one end of the first pipeline is fixedly connected with an outlet of the ammonia-rich tail gas, the other end of the first pipeline is fixedly connected with a condensing system, an outlet of the condensing system is fixedly connected with a pretreatment system, an outlet end of the pretreatment system is fixedly connected with a tail gas filtering system, and an outlet end of the tail gas filtering system is fixedly connected with a gas discharge pipeline;
the condensation system comprises a condenser body, a heat exchange tube, a coolant liquid inlet tube, a coolant liquid outlet tube, a drain tube and a condensate water collecting box, wherein a tail gas inlet and a tail gas outlet are respectively arranged at the left side and the right side of the condenser body, the side wall of the tail gas inlet of the condenser body is provided with an external thread, one end of the first pipeline close to the tail gas inlet is fixedly connected with a nut, the nut is matched with the external thread, the two sides of the upper end of the condenser body are respectively and fixedly connected with the coolant liquid inlet tube and the coolant liquid outlet tube, the lower end of the coolant liquid inlet tube penetrates through the upper side wall of the condenser body to reach the inner cavity of the condenser body and is fixedly connected with the inlet of the heat exchange tube, the lower end of the coolant liquid outlet tube penetrates through the upper side wall of the condenser, the condenser is characterized in that one end of a first water drainage pipe is fixedly connected to the lower end of the condenser body, and the other end of the first water drainage pipe penetrates through the lower end of the condenser body to reach the outer cavity of the condenser body and is fixedly connected with a condensed water collecting box.
2. The system of claim 1, wherein the system comprises: the pretreatment system comprises an air suction pipeline, a blower, a pretreatment box, a rotary fan, a sieve plate and a second drain pipe, one end of the air suction pipeline is fixedly connected with the outlet end of the condensation system, and the other end of the air suction pipeline penetrates through the side wall of the pretreatment tank to reach the inner cavity of the pretreatment tank and is fixedly connected with the air inlet end of the blower, the air outlet end of the blower is connected with an air outlet pipe which is positioned in the inner cavity of the pretreatment tank, the inner side wall of the pretreatment tank is fixedly connected with a sieve plate, the lower end of the pretreatment tank is fixedly connected with one end of a second drain pipe, the other end of the second drain pipe is fixedly connected with a condensed water collecting box, the inner top wall of the pretreatment box is provided with a rotary fan through a fixing piece, and the rotary fan is positioned above the sieve plate, and the upper end of the pretreatment tank is fixedly connected with the inlet end of the tail gas filtering system through a second pipeline.
3. The system of claim 1, wherein the system comprises: the tail gas filtration system comprises a tail gas filtration absorption module, a spray absorption device and an absorption liquid circulation box, wherein the tail gas filtration absorption module is connected in series with two stages of absorption towers, each absorption tower comprises a first absorption tower and a second absorption tower, the upper end side wall of each first absorption tower is connected with the lower end side wall of each second absorption tower through a connecting pipeline, the upper end side wall of each second absorption tower is fixedly connected with a gas emission pipeline, the upper ends of the first absorption tower and the second absorption tower are fixedly connected with the spray absorption device, the lower ends of the first absorption tower and the second absorption tower are connected with the absorption liquid circulation box through the connecting pipeline, the absorption liquid circulation box is fixedly connected with the spray absorption device through a backflow pipeline, and a centrifugal pump is installed on the inner side wall of the backflow pipeline.
4. The system of claim 3, wherein the system comprises: the spraying absorption device comprises an absorption liquid storage box, a motor, a rotating shaft, a driving gear, a driven gear, a gear ring, a nozzle mounting plate and an atomizing nozzle, wherein the upper end of the absorption liquid storage box is fixedly connected with the inner top wall of the absorption tower, the upper end of the absorption tower is fixedly connected with the motor through a bracket, the output end of the motor is fixedly connected with the rotating shaft, the other end of the rotating shaft penetrates through the upper end of the absorption liquid storage box to reach the inner cavity of the absorption liquid storage box and is fixedly sleeved with the driving gear, the driving gear is meshed with a plurality of driven gears, one ends of the driven gears, far away from the driving gear, are respectively meshed with the teeth on the inner side wall of the gear ring, the outer side wall of the gear ring is fixedly connected with the inner side wall of the absorption liquid storage, the spray head mounting plate is of a convex structure, the upper end of the spray head mounting plate is rotatably connected with the inner side wall of the absorption liquid storage tank, and the lower end of the spray head mounting plate is located in an outer cavity of the absorption liquid storage tank.
5. The system for filtering the ammonia-rich tail gas of the high-purity ammonia plant as claimed in claim 2, wherein: the inside wall of second pipeline is connected with the filter screen, and the mesh diameter of filter screen is less than 1 mm.
6. The system of claim 1, wherein the system comprises: the first water discharge pipe is arranged at a tail gas outlet close to the condenser body.
7. The system of claim 3, wherein the system comprises: and an ammonia water concentration detector is arranged on the side wall of the absorption liquid circulating box.
8. The system of claim 1, wherein the system comprises: and the gas discharge pipeline is provided with an exhaust fan and an ammonia gas concentration detector.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811088615.9A CN110898601A (en) | 2018-09-18 | 2018-09-18 | Rich ammonia tail gas filtration system of high-purity ammonia mill |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811088615.9A CN110898601A (en) | 2018-09-18 | 2018-09-18 | Rich ammonia tail gas filtration system of high-purity ammonia mill |
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| CN201811088615.9A Pending CN110898601A (en) | 2018-09-18 | 2018-09-18 | Rich ammonia tail gas filtration system of high-purity ammonia mill |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482046A (en) * | 2020-04-16 | 2020-08-04 | 宁夏灵智科技有限公司 | Energy-concerving and environment-protective type industrial waste gas treatment device |
| CN111530239A (en) * | 2020-06-04 | 2020-08-14 | 崔云兰 | VOCs absorption and purification treatment system and treatment method in automotive interior production process |
| CN111589273A (en) * | 2020-06-04 | 2020-08-28 | 崔云兰 | VOCs purification system and purification method in automotive interior production process |
-
2018
- 2018-09-18 CN CN201811088615.9A patent/CN110898601A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111482046A (en) * | 2020-04-16 | 2020-08-04 | 宁夏灵智科技有限公司 | Energy-concerving and environment-protective type industrial waste gas treatment device |
| CN111530239A (en) * | 2020-06-04 | 2020-08-14 | 崔云兰 | VOCs absorption and purification treatment system and treatment method in automotive interior production process |
| CN111589273A (en) * | 2020-06-04 | 2020-08-28 | 崔云兰 | VOCs purification system and purification method in automotive interior production process |
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