CN213643630U - High-efficient recovery system of ammonia - Google Patents
High-efficient recovery system of ammonia Download PDFInfo
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- CN213643630U CN213643630U CN202020311471.5U CN202020311471U CN213643630U CN 213643630 U CN213643630 U CN 213643630U CN 202020311471 U CN202020311471 U CN 202020311471U CN 213643630 U CN213643630 U CN 213643630U
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Abstract
The utility model relates to the technical field of ammonia recovery equipment, and discloses an efficient ammonia recovery system, which comprises a first ammonia absorption unit, a second ammonia absorption unit and a third ammonia absorption unit which are all provided with a spray tower and a circulating tank, wherein a first cooler is arranged between the circulating pump and the circulating tank; the ammonia absorption device comprises a first ammonia absorber, a second ammonia absorber and a third ammonia absorber, wherein the first ammonia absorber is connected with an ammonia absorption tank for providing water for the first ammonia absorber to absorb ammonia gas, a circulating pump of the first ammonia absorption unit is also connected with the ammonia absorption tank, and a first lifting pump for pumping water from the ammonia absorption tank into the first ammonia absorber is arranged between the first ammonia absorber and the ammonia absorption tank; the second ammonia absorber is connected between the circulating tank of the first ammonia absorbing unit and the circulating tank of the second ammonia absorbing unit; and the third ammonia absorber is connected between the circulating tank of the second ammonia absorbing unit and the circulating tank of the third ammonia absorbing unit. The utility model has good ammonia absorption effect.
Description
Technical Field
The utility model relates to an ammonia recovery plant technical field especially relates to a high-efficient recovery system of ammonia.
Background
In the process of preparing zinc oxide by ammonia method, ammonia water is used for complexing zinc, the evaporated ammonia is used for realizing the crystallization of zinc ions, the ammonia gas of the evaporated ammonia can be used as zinc-ammonia complexing liquid for complexing zinc after being converted into the ammonia water by ammonia absorption, and the whole process is the ammonia circulation process. In the ammonia-process zinc oxide process, ammonia water which is an important production auxiliary material is not paid attention to ammonia gas recovery in the production process of many factories, and ammonia gas is discharged into the surrounding environment to cause ammonia gas pollution, so that the ammonia gas recovery can improve the ammonia gas utilization efficiency and protect the environment.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high-efficient recovery system of ammonia can carry out the high-efficient absorption to ammonia.
In order to achieve the purpose, the utility model provides an ammonia high-efficiency recovery system, including first ammonia absorption unit, second ammonia absorption unit and third ammonia absorption unit, first ammonia absorption unit, second ammonia absorption unit and third ammonia absorption unit all include spray column and circulation tank, the spray column of first ammonia absorption unit, second ammonia absorption unit and third ammonia absorption unit links to each other in proper order and absorbs the ammonia and then discharges tail gas, be connected with on the circulation tank with take out the water in the circulation tank the circulating pump that the spray column absorbed ammonia, the spray column is connected with the return water pipeline that is used for to the circulation tank return water, be equipped with first cooler between circulating pump and the circulation tank;
the ammonia recycling system comprises a first ammonia absorber, a second ammonia absorber and a third ammonia absorber, wherein the first ammonia absorber is connected with an ammonia absorbing tank for providing water for the first ammonia absorber to absorb ammonia gas, a circulating pump of a first ammonia absorbing unit is also connected with the ammonia absorbing tank, a first lifting pump for pumping water from the ammonia absorbing tank into the first ammonia absorber is arranged between the first ammonia absorber and the ammonia absorbing tank, the ammonia absorbing tank is connected with a water inlet for introducing new water and a recovery tank for recovering ammonia water meeting recovery standard concentration in the ammonia absorbing tank, and the spray tower of the first ammonia absorbing unit is connected with the ammonia absorbing tank;
the second ammonia absorber is connected between the circulation tank of the first ammonia absorbing unit and the circulation tank of the second ammonia absorbing unit, and a second lift pump for pumping water from the circulation tank of the second ammonia absorbing unit into the circulation tank of the first ammonia absorbing unit is arranged between the circulation tank of the second ammonia absorbing unit and the circulation tank of the first ammonia absorbing unit;
and the third ammonia absorber is connected between the circulation tank of the second ammonia absorbing unit and the circulation tank of the third ammonia absorbing unit, and a third lifting pump for pumping water from the circulation tank of the third ammonia absorbing unit into the circulation tank of the second ammonia absorbing unit is arranged between the circulation tank of the third ammonia absorbing unit and the circulation tank of the second ammonia absorbing unit.
Preferably, a first valve is arranged close to the circulating pump of the first ammonia absorption unit and used for controlling water to flow to the circulating tank of the first ammonia absorption unit or the ammonia absorption tank.
Preferably, the first ammonia absorber is connected with a second cooler for cooling the ammonia water flowing out of the first ammonia absorber, the second cooler is connected with the ammonia absorption tank, and the second cooler conveys the cooled ammonia water to the ammonia absorption tank.
Preferably, the circulation pump of the second ammonia absorption unit is further connected to the circulation tank of the first ammonia absorption unit, and a second valve is disposed near the circulation pump of the second ammonia absorption unit and used for controlling water to flow to the circulation tank of the first ammonia absorption unit or the circulation tank of the second ammonia absorption unit.
Preferably, the circulation pump of the third ammonia absorption unit is further connected to the circulation tank of the first ammonia absorption unit and the circulation tank of the second ammonia absorption unit, and a third valve is disposed near the circulation pump of the third ammonia absorption unit and used for controlling water to flow to the circulation tank of the first ammonia absorption unit, the circulation tank of the second ammonia absorption unit or the circulation tank of the third ammonia absorption unit.
Preferably, the first ammonia absorber, the second ammonia absorber and the third ammonia absorber comprise a spray pipe, a throat, a negative pressure chamber and an air inlet, the spray pipe is arranged in the center of the negative pressure chamber, the air inlet is connected with the negative pressure chamber, the pipe diameter of the throat is changed from small to large, the center of the bottom of the negative pressure chamber is connected with the small-diameter end of the throat, the center of the spray pipe is aligned with the center of the throat, and ammonia gas is mixed with water flow sprayed out of the spray pipe in the negative pressure chamber and the throat.
Preferably, a spray pipe of the first ammonia absorber is connected with the first lift pump, a throat pipe of the first ammonia absorber is connected with the second cooler, and an air inlet of the first ammonia absorber is connected with a superior system.
Preferably, a spray pipe of the second ammonia absorber is connected with the second lift pump, a throat pipe of the second ammonia absorber is connected with a circulation tank of the first ammonia absorbing unit, and an air inlet of the second ammonia absorber is connected with the ammonia absorbing tank.
Preferably, a spray pipe of the third ammonia absorber is connected with the third lift pump, a throat pipe of the third ammonia absorber is connected with a circulation tank of the second ammonia absorber, and an air inlet of the third ammonia absorber is connected with a spray tower of the third ammonia absorber.
The utility model provides a high-efficient recovery system of ammonia has following beneficial effect:
1. the spray tower comprising a first ammonia absorption unit, a second ammonia absorption unit and a third ammonia absorption unit is used for spraying and absorbing ammonia, ammonia water circulates between the spray tower and the circulation tank and can absorb ammonia efficiently, a first cooler is arranged between the circulation pump and the circulation tank, and the absorption effect of the ammonia can be further improved by cooling through the first cooler;
2. the first ammonia absorber is connected with an ammonia absorption tank for providing water for the first ammonia absorber to absorb ammonia gas, the circulating pump of the first ammonia absorption unit is also connected with the ammonia absorption tank, the first ammonia absorption unit provides water for the first ammonia absorber to absorb ammonia gas, the ammonia absorption unit repeatedly absorbs ammonia gas, and the ammonia absorption effect is further improved;
3. the spray tower of the first ammonia absorption unit is connected with the ammonia absorption tank, so that the spray towers of the first ammonia absorption unit, the second ammonia absorption unit and the third ammonia absorption unit can sequentially spray the tail gas of the first ammonia absorber to absorb ammonia, and the ammonia absorption effect is improved;
4. the second ammonia absorber is connected between the circulating tank of the first ammonia absorbing unit and the circulating tank of the second ammonia absorbing unit, and the second ammonia absorber can repeatedly utilize the ammonia water in the circulating tank of the second ammonia absorbing unit to absorb ammonia, so that the ammonia absorbing effect is improved;
5. connect between the recycle tank of the second ammonia absorption unit and the recycle tank of the third ammonia absorption unit, the second ammonia absorber can recycle the ammonia water absorption of the recycle tank of the second ammonia absorption unit, and the ammonia absorption effect is improved.
Further, tail gas of the ammonia absorption tank enters the second ammonia absorber, ammonia which is not absorbed by the first ammonia absorber can be absorbed again, and the ammonia absorption effect is improved.
Further, the tail gas discharged from the spray towers of the first ammonia absorption unit, the second ammonia absorption unit and the third ammonia absorption unit enters the third ammonia absorber, so that ammonia in the tail gas discharged from the spray towers of the first ammonia absorption unit, the second ammonia absorption unit and the third ammonia absorption unit can be absorbed again, and the ammonia absorption effect is improved.
Drawings
FIG. 1 is a schematic structural diagram of an ammonia gas high-efficiency recovery system in an embodiment of the present invention;
FIG. 2 is a schematic structural view of an ammonia absorber according to an embodiment of the present invention;
fig. 3 is a schematic front view of a first cooler in an embodiment of the present invention;
fig. 4 is a schematic cross-sectional structure diagram of a first cooler in an embodiment of the invention;
fig. 5 is a schematic structural view of a circulation tank in an embodiment of the present invention;
FIG. 6 is a schematic structural view of an ammonia absorption tank according to an embodiment of the present invention;
in the figure, 100 is a first ammonia absorption unit; 131. a first valve; 200. a second ammonia absorption unit; 231. a second valve; 300. a third ammonia absorption unit; 331. a third valve; 414. a first cooler; 415. a second cooler; 500. an ammonia absorber; 510. a nozzle; 520. a throat; 530. a negative pressure chamber; 540. an air inlet; 610. a recovery tank; 620. an ammonia absorption tank; 621. a water inlet; 622. an exhaust port; 630. a lift pump; 710. a spray tower; 711. a first valve; 720. A circulation tank; 722. a water inlet; 724. an ammonia water outlet; 730. a circulation pump; 741. an inner tube; 741a and an inner pipe connecting flange; 743. a medium pipe; 747. a thermal insulation layer; 760. a water return pipeline.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
As shown in fig. 1 to 6, the ammonia gas high-efficiency recovery system according to the preferred embodiment of the present invention has an excellent ammonia absorption effect.
Based on the above technical scheme, the embodiment provides a high-efficient recovery system of ammonia, including first inhale ammonia unit 100, second ammonia absorption unit 200 and third ammonia absorption unit 300, first inhale ammonia unit 100, second ammonia absorption unit 200 and third ammonia absorption unit 300 are used for spraying and inhale the ammonia.
Specifically, the first ammonia absorption unit 100, the second ammonia absorption unit 200 and the third ammonia absorption unit 300 each include a spray tower 710 and a circulation tank 720, the spray towers 710 of the first ammonia absorption unit 100, the second ammonia absorption unit 200 and the third ammonia absorption unit 300 are connected in sequence to absorb ammonia gas and then exhaust tail gas, water is sprayed in the spray towers 710, so that the contact area between water and ammonia is increased, the spray towers 710 can fully absorb ammonia, and the absorption effect of ammonia is improved.
The ammonia water concentration of the circulation tanks 720 in the first ammonia absorption unit 100, the second ammonia absorption unit 200 and the third ammonia absorption unit 300 is gradually reduced through the stepwise absorption by the first ammonia absorption unit 100, the second ammonia absorption unit 200 and the third ammonia absorption unit 300.
Specifically, the circulation tank 720 is connected to a circulation pump 730 for pumping the water in the circulation tank 720 to the spray tower 710 to absorb ammonia, and the circulation pump 730 provides the power for the circulation tank 720 to circulate the water to the spray tower 710.
Specifically, a return pipe 760 for returning water to the circulation tank 720 is connected to the spray tower 710, and the return pipe 760 allows water to return from the spray tower 710 to the circulation tank 720, thereby completing water circulation.
Specifically, be equipped with first cooler 414 between circulating pump 730 and the circulating tank 720, first cooler 414 can cool off the aqueous ammonia that circulates in first ammonia unit 100, second ammonia unit 200 and the third ammonia unit 300 of inhaling, improves the absorption effect of ammonia.
The utility model discloses still include first ammonia absorber 410, second ammonia absorber 420 and third ammonia absorber 430, first ammonia absorber 410 is connected with and is used for providing first ammonia absorber 410 and absorbs ammonia absorption tank 620 of ammonia water, and first ammonia absorber 410's water velocity is very fast, and ammonia absorption tank 620 can supply first ammonia absorber 410 and absorb ammonia water uninterruptedly.
As shown in fig. 6, ammonia water in the ammonia absorption tank 620 escapes ammonia gas, and the escaped ammonia gas and the unabsorbed ammonia gas are discharged through an exhaust port 622 of the ammonia absorption tank 620.
Specifically, the circulation pump 730 of the first ammonia absorption unit 100 is further connected to the ammonia absorption tank 620, the first ammonia absorption unit 100 can be supplemented into the ammonia absorption tank 620 through the circulation pump 730 to supplement water for the ammonia absorber 500, and when the ammonia absorber 500 absorbs ammonia and the water consumption speed of the ammonia absorber 500 is high, ammonia water can be supplemented into the ammonia absorption tank 620 to be used by the ammonia absorber 500. The ammonia water recovered from the first ammonia absorption unit 100 is absorbed again by the ammonia absorber 500, so that the ammonia concentration is increased, and the ammonia absorption effect is improved.
Specifically, a first lift pump 413 for pumping water from the ammonia suction tank 620 into the first ammonia sucker 410 is disposed between the first ammonia sucker 410 and the ammonia suction tank 620, and the first lift pump 413 pumps the water from the ammonia suction tank 620 into the first ammonia sucker 410.
Specifically, as shown in fig. 6, the ammonia absorption tank 620 is connected to a water inlet 621 for introducing new water and a recovery tank 610 for recovering ammonia water meeting the recovery standard concentration in the ammonia absorption tank 620, and an exhaust port 622 is disposed at the top of the ammonia absorption tank 620.
Specifically, the spray tower 710 of the first ammonia absorption unit 100 is connected to the ammonia absorption tank 620, and the gas discharged from the ammonia absorption tank 620 is sprayed and absorbed by the first ammonia absorption unit 100, the second ammonia absorption unit 200 and the third ammonia absorption unit 300, thereby improving the ammonia absorption effect.
As shown in fig. 5, ammonia water can be discharged from the circulation tank 720 through the ammonia water outlet 724, and new water can be added to the circulation tank 720 through the water inlet 722.
Specifically, the second ammonia absorber 420 is connected between the circulation tank 720 of the first ammonia absorption unit 100 and the circulation tank 720 of the second ammonia absorption unit 200, and a second lift pump 423 for pumping water from the circulation tank 720 of the second ammonia absorption unit 200 into the circulation tank 720 of the first ammonia absorption unit 100 is provided between the circulation tank 720 of the second ammonia absorption unit 200 and the circulation tank 720 of the first ammonia absorption unit 100. Make the circulation tank 720 of second ammonia absorption unit 200 can provide the aqueous ammonia to second ammonia absorber 420, supply the ammonia absorption to use, repeat the ammonia absorption to the water that sprays the ammonia absorption, can further improve the ammonia absorption effect through second ammonia absorber 420.
Specifically, the third ammonia absorber 430 is connected between the circulation tank 720 of the second ammonia absorption unit 200 and the circulation tank 720 of the third ammonia absorption unit 300, and a third lift pump 433 for pumping water from the circulation tank 720 of the third ammonia absorption unit 300 into the circulation tank 720 of the second ammonia absorption unit 200 is provided between the circulation tank 720 of the third ammonia absorption unit 300 and the circulation tank 720 of the second ammonia absorption unit 200. The repeated ammonia absorption of the water sprayed with the ammonia absorption in the circulation tank 720 of the third ammonia absorption unit 300 can further improve the ammonia absorption effect.
Preferably, the circulation pump 730 of the first ammonia absorption unit 100 is further connected to the ammonia absorption tank 620, and a first valve 131 is provided near the circulation pump 730 of the first ammonia absorption unit 100 for controlling water flow to the circulation tank 720 of the first ammonia absorption unit 100 or the ammonia absorption tank 620. The number of the first valves 131 is two, one is arranged between the spray tower 710 and the circulating pump 730, the other is arranged between the ammonia absorption tank 620 and the circulating pump 730, the first valve 131 arranged between the spray tower 710 and the circulating pump 730 can control the on-off of the communication of the spray tower 710, and the first valve 131 arranged between the ammonia absorption tank 620 and the circulating pump 730 can control the on-off of the communication of the ammonia absorption tank 620 and the circulating pump 730.
The water flow can be supplemented into the ammonia absorption tank 620 by controlling the first valve 131 between the spray tower 710 and the circulation pump 730 to be closed and the first valve 131 between the ammonia absorption tank 620 and the circulation pump 730 to be opened. The water stream may be returned to the circulation tank 720 by controlling the first valve 131 between the spray tower 710 and the circulation pump 730 to be opened and the first valve 131 between the ammonia-absorbing tank 620 and the circulation pump 730 to be closed.
Preferably, the first ammonia absorber 410 is connected with a second cooler 416 for cooling the ammonia water flowing out from the first ammonia absorber 410, the second cooler 416 is connected with the ammonia absorbing tank 620, and the second cooler 416 delivers the cooled ammonia water to the ammonia absorbing tank 620.
Preferably, as shown in fig. 2 and fig. 3, the first cooler 414 and the second cooler 416 as the ammonia water cooling device have the same structure, the first cooler 414 and the second cooler 416 both include an inner pipe 741 and a medium pipe 743, the inner pipe 741 is sleeved in the medium pipe 743, the medium pipe 743 is used for passing cold water, the inner pipe 741 is used for passing ammonia water, and the medium pipe 743 is coated with a thermal insulation layer 747. The end of the medium pipe 743 is connected with an external cold water pipeline through a thread, and the medium pipe 743 is connected with the outer side wall of the inner pipe 741 in an abutting mode, so that the medium pipe 743 can fully absorb heat of the inner pipe 741. When used as a cooler, the ammonia water passing through the inside of the medium pipe 743 has a better cooling effect, and therefore, the medium pipe 743 is provided inside the inner pipe 741, which can improve the cooling effect of the ammonia water. The thermal insulation layer 747 can sufficiently insulate heat to prevent cold water from absorbing external heat.
Preferably, both ends of the inner tube 741 are open, the inner tube 741 is provided with an inner tube connecting flange 741a, and an end of the inner tube 741 protrudes from the medium tube 743.
When the ammonia water pipe is installed, the ammonia water pipe is connected with the inner pipe connecting flange 741a, the inner pipe connecting flange 741a is provided with a connecting bolt, and the inner pipe connecting flange 741a is provided with a sealing ring, so that ammonia water leakage is avoided.
Specifically, the medium pipe 743 is spiral, so that the contact area between the inner pipe 741 and the medium pipe 743 is increased, and the heat exchange effect between the inner pipe 741 and the medium pipe 743 is improved.
Preferably, the inner pipe 741 is a cold drawn pipe, the medium pipe 743 is a steel pipe, and ammonia water corrodes copper and steel poorly, so the inner pipe 741 is made of a cold drawn pipe made of a steel pipe, can better resist corrosion of ammonia water, and has a long service life.
Meanwhile, as the inner pipe 741 is a straight pipe, ammonia water directly passes through the inner pipe 741, corrosion of the ammonia water to the inner pipe 741 can be reduced, and the service life of the inner pipe 741 is prolonged.
Alternatively, the medium pipe 743 can be a copper pipe, so that the heat conduction effect is improved.
Preferably, the circulation pump 730 of the second ammonia absorption unit 200 is further connected to the circulation tank 720 of the first ammonia absorption unit 100, and a second valve 231 is provided adjacent to the circulation pump 730 of the second ammonia absorption unit 200 for controlling the flow of water to the circulation tank 720 of the first ammonia absorption unit 100 or the circulation tank 720 of the second ammonia absorption unit 200. The number of the second valves 231 is two, one is arranged between the spray tower 710 and the circulating pump 730, the other is arranged between the ammonia absorption tank 620 and the circulating pump 730, the second valve 231 arranged between the spray tower 710 and the circulating pump 730 can control the on-off of the communication of the spray tower 710, and the second valve 231 arranged between the ammonia absorption tank 620 and the circulating pump 730 can control the on-off of the communication of the ammonia absorption tank 620 and the circulating pump 730.
The water stream may be refluxed into the circulation tank 720 of the first ammonia absorbing unit 100 by controlling the second valve 231 between the spray tower 710 and the circulation pump 730 to be closed and the second valve 231 between the ammonia absorbing tank 620 and the circulation pump 730 to be opened. The water stream may be returned to the circulation tank 720 by controlling the second valve 231 between the spray tower 710 and the circulation pump 730 to be opened and the second valve 231 between the ammonia absorption tank 620 and the circulation pump 730 to be closed.
Preferably, the circulation pump 730 of the third ammonia absorption unit 300 is further connected to the circulation tank 720 of the first ammonia absorption unit 100 and the circulation tank 720 of the second ammonia absorption unit 200, respectively, and a third valve 331 is provided adjacent to the circulation pump 730 of the third ammonia absorption unit 300 for controlling the flow of water to the circulation tank 720 of the first ammonia absorption unit 100, the circulation tank 720 of the second ammonia absorption unit 200, or the circulation tank 720 of the third ammonia absorption unit 300.
As shown in fig. 1, in the third ammonia absorbing unit 300, the circulation pump 730 adjacent to the third ammonia absorbing unit 300 is provided with three third valves 331, and the number of the third valves 331 is three, and the flow of water to the circulation tank 720 of the first ammonia absorbing unit 100, the circulation tank 720 of the second ammonia absorbing unit 200, or the circulation tank 720 of the third ammonia absorbing unit 300 can be controlled according to the same control principle as that of the first valve 131 and the second valve 231.
Preferably, the first ammonia sucker 410, the second ammonia sucker 420 and the third ammonia sucker 430 comprise a spray pipe 510, a throat 520, a negative pressure chamber 530 and an air inlet 540, the spray pipe 510 is arranged at the center of the negative pressure chamber 530, the air inlet 540 is connected with the negative pressure chamber 530, the pipe diameter of the throat 520 is changed from small to large, the center of the bottom of the negative pressure chamber 530 is connected with the small-diameter end of the throat 520, the center of the spray pipe 510 is aligned with the center of the throat 520, and the ammonia gas is mixed with the water flow sprayed by the spray pipe 510 in the negative pressure chamber 530 and the throat 520.
The ammonia absorber 500 is actually a venturi tube, when in operation, a pump pumps water into the spray pipe 510 of the first-stage ammonia absorber 411 and the second-stage ammonia absorber 421, the water is sprayed out of the negative pressure chamber 530 at a high speed under the pump pressure to be mixed with ammonia gas, the mixture of ammonia gas and water enters the throat 520, the pipe diameter of the throat 520 is changed from small to large, the water flow is released and diffused after being sprayed out of the throat 520 to form a water column with the diameter changed from small to large, the water column rapidly descends under the action of pressure and gravity, in the process, negative pressure is formed in the throat 520 according to the venturi effect, and the ammonia gas is rapidly absorbed by the water in the throat 520, so that rapid ammonia absorption is realized.
The installation height of the ammonia absorber 500 is 12-15 m, a long straight pipe is installed at the bottom of the ammonia absorber 500, the power for descending the ammonia water is provided by using gravity, and the phenomenon that the ammonia absorber 500 reversely absorbs the ammonia water in the long straight pipe at the bottom of the ammonia absorber 500 when ammonia is absorbed in the ammonia absorber 500 is avoided.
Preferably, the spray pipe 510 of the first ammonia absorber 410 is connected with the first lift pump 413, the throat 520 of the first ammonia absorber 410 is connected with the second cooler 416, and the air inlet 540 of the first ammonia absorber 410 is connected with the upper-level system. The first ammonia absorber 410 can absorb ammonia from ammonia gas with high concentration, and the ammonia absorber can ensure the absorption effect of ammonia gas from a superior system by being matched with the second cooler 416.
Preferably, the spray pipe 510 of the second ammonia absorber 420 is connected with the second lift pump 423, the throat 520 of the second ammonia absorber 420 is connected with the circulation tank 720 of the first ammonia absorbing unit 100, and the gas inlet 540 of the second ammonia absorber 420 is connected with the ammonia absorbing tank 620.
Here, the air inlet 540 of the second ammonia absorber 420 is connected to the ammonia absorption tank 620, and the ammonia absorption is repeated by using the ammonia water sprayed and absorbed from the second ammonia absorption unit 200, so that the gas discharged from the ammonia absorption tank 620 is absorbed by the second ammonia absorber 420, thereby further ensuring the improvement of the ammonia absorption effect.
Preferably, the spray pipe 510 of the third ammonia absorber 430 is connected with the third lift pump 433, the throat 520 of the third ammonia absorber 430 is connected with the circulation tank 720 of the second ammonia absorber unit 200, and the gas inlet 540 of the third ammonia absorber 430 is connected with the spray tower 710 of the third ammonia absorber unit 300. The tail gas sprayed and absorbed by the first ammonia absorption unit 100, the second ammonia absorption unit 200 and the third ammonia absorption unit 300 can be further concentrated under the absorption of the third ammonia absorber 430, and the ammonia absorption effect is improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and replacements can be made without departing from the technical principle of the present invention, and these modifications and replacements should also be regarded as the protection scope of the present invention.
Claims (9)
1. An efficient ammonia gas recovery system is characterized by comprising a first ammonia absorption unit, a second ammonia absorption unit and a third ammonia absorption unit, wherein the first ammonia absorption unit, the second ammonia absorption unit and the third ammonia absorption unit respectively comprise a spray tower and a circulating tank, the spray towers of the first ammonia absorption unit, the second ammonia absorption unit and the third ammonia absorption unit are sequentially connected to absorb ammonia gas and then discharge tail gas, the circulating tank is connected with a circulating pump for pumping water in the circulating tank to the spray tower to absorb ammonia, the spray tower is connected with a water return pipeline for returning water to the circulating tank, and a first cooler is arranged between the circulating pump and the circulating tank;
the ammonia recycling system comprises a first ammonia absorber, a second ammonia absorber and a third ammonia absorber, wherein the first ammonia absorber is connected with an ammonia absorbing tank for providing water for the first ammonia absorber to absorb ammonia gas, a circulating pump of a first ammonia absorbing unit is also connected with the ammonia absorbing tank, a first lifting pump for pumping water from the ammonia absorbing tank into the first ammonia absorber is arranged between the first ammonia absorber and the ammonia absorbing tank, the ammonia absorbing tank is connected with a water inlet for introducing new water and a recovery tank for recovering ammonia water meeting recovery standard concentration in the ammonia absorbing tank, and the spray tower of the first ammonia absorbing unit is connected with the ammonia absorbing tank;
the second ammonia absorber is connected between the circulation tank of the first ammonia absorbing unit and the circulation tank of the second ammonia absorbing unit, and a second lift pump for pumping water from the circulation tank of the second ammonia absorbing unit into the circulation tank of the first ammonia absorbing unit is arranged between the circulation tank of the second ammonia absorbing unit and the circulation tank of the first ammonia absorbing unit;
and the third ammonia absorber is connected between the circulation tank of the second ammonia absorbing unit and the circulation tank of the third ammonia absorbing unit, and a third lifting pump for pumping water from the circulation tank of the third ammonia absorbing unit into the circulation tank of the second ammonia absorbing unit is arranged between the circulation tank of the third ammonia absorbing unit and the circulation tank of the second ammonia absorbing unit.
2. The system for efficiently recycling ammonia gas as defined in claim 1, wherein a first valve is provided near the circulation pump of the first ammonia absorption unit for controlling water flow to the circulation tank of the first ammonia absorption unit or the ammonia absorption tank.
3. The system for efficiently recycling ammonia gas as defined in claim 2, wherein a second cooler for cooling the ammonia water flowing out from the first ammonia absorber is connected to the first ammonia absorber, the second cooler is connected to the ammonia absorbing tank, and the second cooler delivers the cooled ammonia water to the ammonia absorbing tank.
4. The system for efficiently recycling ammonia gas as claimed in claim 3, wherein the circulation pump of the second ammonia absorption unit is further connected with the circulation tank of the first ammonia absorption unit, and a second valve is arranged near the circulation pump of the second ammonia absorption unit and used for controlling water to flow to the circulation tank of the first ammonia absorption unit or the circulation tank of the second ammonia absorption unit.
5. The system for efficiently recycling ammonia gas as claimed in claim 4, wherein the circulating pump of the third ammonia absorption unit is further connected with the circulating tank of the first ammonia absorption unit and the circulating tank of the second ammonia absorption unit, respectively, and a third valve is arranged near the circulating pump of the third ammonia absorption unit for controlling water flow to the circulating tank of the first ammonia absorption unit, the circulating tank of the second ammonia absorption unit or the circulating tank of the third ammonia absorption unit.
6. The system for efficiently recycling ammonia gas as claimed in claim 5, wherein the first ammonia absorber, the second ammonia absorber and the third ammonia absorber comprise a nozzle, a throat, a negative pressure chamber and an air inlet, the nozzle is arranged at the center of the negative pressure chamber, the air inlet is connected with the negative pressure chamber, the pipe diameter of the throat is changed from small to large, the center of the bottom of the negative pressure chamber is connected with the small-diameter end of the throat, the center of the nozzle is aligned with the center of the throat, and ammonia gas is mixed with water flow sprayed out of the nozzle in the negative pressure chamber and the throat.
7. The system for efficiently recycling ammonia gas as claimed in claim 6, wherein the spray pipe of the first ammonia absorber is connected with the first lift pump, the throat pipe of the first ammonia absorber is connected with the second cooler, and the air inlet of the first ammonia absorber is connected with a superior system.
8. The system for efficiently recycling ammonia gas as claimed in claim 7, wherein the spray pipe of the second ammonia absorber is connected with the second lift pump, the throat pipe of the second ammonia absorber is connected with the circulation tank of the first ammonia absorber unit, and the air inlet of the second ammonia absorber is connected with the ammonia absorber tank.
9. The system for efficiently recycling ammonia gas as claimed in claim 8, wherein the spray pipe of the third ammonia absorber is connected with the third lift pump, the throat pipe of the third ammonia absorber is connected with the circulation tank of the second ammonia absorber, and the air inlet of the third ammonia absorber is connected with the spray tower of the third ammonia absorber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020311471.5U CN213643630U (en) | 2020-03-13 | 2020-03-13 | High-efficient recovery system of ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020311471.5U CN213643630U (en) | 2020-03-13 | 2020-03-13 | High-efficient recovery system of ammonia |
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| Publication Number | Publication Date |
|---|---|
| CN213643630U true CN213643630U (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020311471.5U Active CN213643630U (en) | 2020-03-13 | 2020-03-13 | High-efficient recovery system of ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213643630U (en) |
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2020
- 2020-03-13 CN CN202020311471.5U patent/CN213643630U/en active Active
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