CN211537145U - Ammonia recovery system - Google Patents
Ammonia recovery system Download PDFInfo
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- CN211537145U CN211537145U CN201921859439.4U CN201921859439U CN211537145U CN 211537145 U CN211537145 U CN 211537145U CN 201921859439 U CN201921859439 U CN 201921859439U CN 211537145 U CN211537145 U CN 211537145U
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Abstract
The utility model relates to a gas recovery field especially relates to an ammonia recovery system, and its technical scheme main points are: including the one-level ammonia sucker, the one-level ammonia sucker is connected with the cooler, the one-level ammonia sucker is connected with the one-level circulation jar that is used for providing the water of absorbing the ammonia, be equipped with between one-level ammonia sucker and the one-level circulation jar and be used for following the one-level circulation jar one-level circulating pump of suction ammonia sucker with water, the cooler links to each other with the one-level circulation jar, the cooler carries the aqueous ammonia to the one-level circulation jar, the one-level circulation jar is connected with the recovery pond that is used for retrieving the aqueous ammonia that accords with the recovery standard concentration in the one-level circulation jar, the one-level circulation jar is connected with second grade ammonia recovery system, second grade. The utility model discloses can effectively retrieve the ammonia in the tail gas, not only make exhaust emissions reach emission standard, still practice thrift manufacturing cost.
Description
Technical Field
The utility model relates to a gas recovery field especially relates to an ammonia recovery system.
Background
In the process of preparing zinc oxide by the ammonia method, ammonia water is an important production auxiliary material, and most manufacturers do not pay attention to ammonia recovery in the production process, so that ammonia is discharged into the environment to cause ammonia pollution, and the environment can be protected and the production cost can be reduced after the ammonia recovery is finished.
The recovered ammonia is generally recovered by the principle that the ammonia is easy to dissolve in water, and the ammonia can emit a large amount of heat when dissolved in water, so that the water temperature is increased, but the absorption effect of the ammonia is better when the water temperature is lower, so that the water temperature can be reduced, and the recovered ammonia can be maximized.
The existing ammonia gas recovery device is not provided with a cooling device and has few recovery levels, so that part of ammonia gas is not effectively recovered and the recovery efficiency is low.
SUMMERY OF THE UTILITY MODEL
In view of this, it is necessary to provide an ammonia gas recovery system in order to solve the problem of low ammonia gas recovery efficiency.
An ammonia gas recovery system comprises a primary ammonia absorber, the primary ammonia absorber is connected with a cooler for cooling ammonia water flowing out of the primary ammonia absorber, the primary ammonia absorber is connected with a primary circulating tank for providing water for the primary ammonia absorber to absorb ammonia gas, a primary circulating pump for pumping water from the primary circulating tank into the primary ammonia absorber is arranged between the primary ammonia absorber and the primary circulating tank, the cooler is connected with the primary circulating tank and used for conveying the cooled ammonia water to the primary circulating tank, the primary circulating tank is connected with a recovery tank for recovering ammonia water with concentration meeting the recovery standard in the primary circulating tank, the primary circulation tank is connected with a secondary ammonia recovery system, and the secondary ammonia recovery system carries out secondary ammonia recovery on ammonia and tail gas which are not dissolved in water in the primary circulation tank and discharges the tail gas.
In one embodiment, the secondary ammonia recovery system comprises a secondary ammonia absorber, the secondary ammonia absorber is connected with the primary circulation tank, and ammonia gas and tail gas which are not dissolved in water in the primary circulation tank enter the secondary ammonia recovery system from the secondary ammonia absorber.
In one embodiment, the secondary ammonia absorber is connected with a secondary circulation tank, a secondary circulation pump is arranged between the secondary ammonia absorber and the secondary circulation tank, the secondary circulation pump pumps water from the secondary circulation tank into the secondary ammonia absorber to absorb ammonia gas, and the secondary ammonia absorber discharges the water after absorbing ammonia gas back to the secondary circulation tank.
In one embodiment, the secondary circulation tank is connected with the primary circulation tank, the secondary circulation pump is arranged between the secondary circulation tank and the primary circulation tank, a valve is arranged close to the primary circulation tank, water in the primary circulation tank is discharged into the recovery tank, the secondary circulation pump supplements water in the secondary circulation tank to the primary circulation tank, and the secondary circulation tank directly supplements clean water.
In one embodiment, the two-stage ammonia recovery system comprises a first spray tower, a second spray tower and a third spray tower, wherein the first spray tower is connected with the second spray tower, the second spray tower is connected with the third spray tower, the two-stage circulation tank is connected with the first spray tower, and the unabsorbed ammonia and tail gas in the two-stage circulation tank are absorbed by the first spray tower, the second spray tower and the third spray tower and then discharged from the third spray tower.
In one embodiment, the first spray tower is connected with a first circulation tank, the first circulation tank is provided with a first circulation pump, the first circulation pump pumps water up the first spray tower for spraying, water returns to the first circulation tank through a pipeline, the second spray tower is connected with a second circulation tank, the second circulation tank is provided with a second circulation pump, the second circulation pump pumps water up the second spray tower for spraying, water returns to the second circulation tank through a pipeline, the third spray tower is connected with a third circulation tank, the third circulation tank is provided with a third circulation pump, the third circulation pump pumps water up the third spray tower for spraying, and water returns to the third circulation tank through a pipeline.
In one embodiment, the first circulation pump is connected to the second circulation tank, a valve is disposed near the second circulation tank, the first circulation pump is used for conveying water into the second circulation tank, the second circulation pump is connected to the first circulation tank, a valve is disposed near the first circulation tank, the second circulation pump is used for conveying water into the first circulation tank, the third circulation pump is connected to the second circulation tank, a valve is disposed near the second circulation tank, the third circulation pump is used for conveying water into the second circulation tank, and a valve is disposed in the third circulation tank for replenishing water.
In one embodiment, the primary ammonia absorber and the secondary ammonia absorber comprise a spray pipe, a throat, a negative pressure chamber and an air inlet, the spray pipe 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 gradually increased, 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.
In one embodiment, a spray pipe of the primary ammonia absorber is connected with the primary circulating pump, a throat pipe of the primary ammonia absorber is connected with the cooler, and an air inlet of the primary ammonia absorber is connected with a superior system.
In one embodiment, a spray pipe of the secondary ammonia absorber is connected with the secondary circulating pump, a throat pipe of the secondary ammonia absorber is connected with the secondary circulating tank, and an air inlet of the secondary ammonia absorber is connected with the primary circulating tank.
The utility model provides an ammonia recovery system, the tail gas that has the ammonia gets into ammonia recovery system from one-level ammonia absorber, the tail gas that has the ammonia mixes with water in the one-level ammonia absorber, the ammonia is absorbed, tail gas and water are discharged into the cooler together, cool down, improve ammonia absorption efficiency, tail gas and water are discharged into the one-level circulation jar by the cooler again, the water in the one-level circulation jar is retransferred to the one-level ammonia absorber to carry out the ammonia absorption to the circulating pump, continuous circulation, reach the recovery standard and be discharged into the recovery pond until the aqueous ammonia concentration in the one-level circulation jar, tail gas is then discharged after being discharged into second grade ammonia recovery system and carrying out the secondary and retrieving, this kind of circulating and multistage ammonia recovery of ammonia recovery system, the recovery efficiency of ammonia has been improved greatly, make exhaust tail gas reach emission standard simultaneously.
Drawings
FIG. 1 is a schematic view of the structure of an ammonia gas recovery system in one embodiment;
FIG. 2 is a schematic diagram of the structure of an ammonia recovery system in one embodiment;
FIG. 3 is a schematic view showing the structure of an ammonia absorber in one embodiment.
In the figure: 100. a primary ammonia absorber; 200. a cooler; 300. a first-stage circulation tank; 400. a first-stage circulating pump; 500. a recovery tank; 600. a secondary ammonia recovery system; 601. a secondary ammonia absorber; 602. a secondary circulation tank; 603. a second-stage circulating pump; 611. a first spray tower; 612. a second spray tower; 613. a third spray tower; 614. a first circulation tank; 615. a first circulation pump; 616. a second recycle tank; 617. a second circulation pump; 618. a third circulation pump; 619. a third circulation tank; 701. an air inlet; 702. a nozzle; 703. a negative pressure chamber; 704. a throat pipe.
Detailed Description
In one embodiment, as shown in fig. 1, an ammonia gas recovery system comprises a primary ammonia absorber 100, the primary ammonia absorber 100 is connected with a cooler 200 for cooling ammonia water flowing out from the primary ammonia absorber 100, the primary ammonia absorber 100 is connected with a primary circulation tank 300 for providing water for the primary ammonia absorber 100 to absorb ammonia gas, a primary circulation pump 400 for pumping water from the primary circulation tank 300 into the primary ammonia absorber 100 is arranged between the primary ammonia absorber 100 and the primary circulation tank 300, the cooler 200 is connected with the primary circulation tank 300, the cooler 200 conveys the cooled ammonia water to the primary circulation tank 300, the primary circulation tank 300 is connected with a recovery tank 500 for recovering ammonia water meeting recovery standard concentration in the primary circulation tank 300, the primary circulation tank 300 is connected with a secondary ammonia gas recovery system 600, the secondary ammonia recovery system 600 performs secondary ammonia recovery on ammonia and tail gas which are not dissolved in water in the primary circulation tank 300 and discharges the tail gas.
The tail gas with ammonia gets into the ammonia recovery system from one-level ammonia absorber 100, the tail gas with ammonia mixes with water in one-level ammonia absorber 100, the ammonia is absorbed, the tail gas is discharged into cooler 200 with water, cool down, improve ammonia absorption efficiency, tail gas and water are discharged into one-level circulation jar 300 by cooler 200 again, one-level circulating pump 400 is carried the water in one-level circulation jar 300 to one-level ammonia absorber 100 again and is carried out the ammonia absorption, continuous circulation, reach the recovery standard and be discharged into recovery pond 500 until the aqueous ammonia concentration in one-level circulation jar 300 reaches, tail gas is discharged into second grade ammonia recovery system 600 and is carried out the secondary and retrieved the back and discharge, this kind of circulating and multistage ammonia recovery of ammonia recovery system, the recovery efficiency of ammonia has greatly improved, make the exhaust tail gas reach emission standard simultaneously.
A valve is further arranged between the primary circulation tank 300 and the recovery tank 500, when the ammonia water concentration in the primary circulation tank 300 after absorbing ammonia gas meets the recovery requirement, the valve is opened, the ammonia water is discharged into the recovery tank 500, and the ammonia gas recovery is completed.
In one embodiment, as shown in fig. 1 and fig. 2, the secondary ammonia recovery system 600 includes a secondary ammonia absorber 601, the secondary ammonia absorber 601 is connected to the primary circulation tank 300, and the ammonia gas and the tail gas which are not dissolved in water in the primary circulation tank 300 enter the secondary ammonia recovery system 600 from the secondary ammonia absorber 601.
After the tail gas and the water containing ammonia gas are mixed in the primary ammonia absorber 100, the cooler 200 and the primary circulation tank 300, the unabsorbed ammonia gas and tail gas enter the secondary ammonia absorber 601 along with the pipeline for secondary mixing absorption.
The ammonia is preliminarily recovered through the primary recovery system and is secondarily recovered through the secondary recovery system, so that the ammonia recovery efficiency is maximized.
In one embodiment, as shown in fig. 2, a secondary circulation tank 602 is connected to the secondary ammonia absorber 601, a secondary circulation pump 603 is disposed between the secondary ammonia absorber 601 and the secondary circulation tank 602, the secondary circulation pump 603 pumps water from the secondary circulation tank 602 to the secondary ammonia absorber 601 to absorb ammonia gas, and the secondary ammonia absorber 601 discharges the water after absorbing ammonia gas back to the secondary circulation tank 602.
The secondary ammonia recovery is similar to the primary ammonia recovery process. Unabsorbed ammonia gas and tail gas from the primary circulation tank 300 are mixed with water in the secondary ammonia absorber 601, and the water is discharged from the secondary circulation tank 602 after being mixed, and is discharged back to the secondary circulation tank 602 for continuous circulation.
In one embodiment, as shown in fig. 2, the secondary circulation tank 602 is connected to the primary circulation tank 300, the secondary circulation pump 603 is disposed between the secondary circulation tank 602 and the primary circulation tank 300, a valve is disposed near the primary circulation tank 300, water in the primary circulation tank 300 is discharged to the recycling tank 500, the secondary circulation pump 603 replenishes water in the secondary circulation tank 602 to the primary circulation tank 300, and the secondary circulation tank 602 directly replenishes clean water.
The first-stage circulation tank 300 is connected between the second-stage circulation pump 603 and the pipeline of the second-stage ammonia absorber 601, the valve of the first-stage circulation tank 300 is not opened, water in the second-stage circulation tank 602 is conveyed to the second-stage ammonia absorber 601 to be mixed with ammonia gas, and when the valve is opened, the water is conveyed to the first-stage circulation tank 300 to be used as a make-up liquid for the first-stage ammonia recovery system.
In one embodiment, as shown in fig. 1 and fig. 2, the secondary ammonia recovery system 600 includes a first spray tower 611, a second spray tower 612, and a third spray tower 613, the first spray tower 611 is connected to the second spray tower 612, the second spray tower 612 is connected to the third spray tower 613, the secondary circulation tank 602 is connected to the first spray tower 611, and the unabsorbed ammonia and the unabsorbed exhaust gas in the secondary circulation tank 602 are absorbed by the first spray tower 611, the second spray tower 612, and the third spray tower 613 and then discharged from the third spray tower 613.
The ammonia gas which is not absorbed in the secondary ammonia absorber 601 and the secondary circulation tank 602 is finally recovered through the first spray tower 611, the second spray tower 612 and the third spray tower 613, the contact area of the ammonia gas and water is increased by spraying, the ammonia gas mixed in the tail gas is absorbed to the maximum extent, and the ammonia gas recovery rate is improved.
In one embodiment, as shown in fig. 2, a first circulation tank 614 is connected to the first spray tower 611, the first circulation tank 614 is provided with a first circulation pump 615, the first circulation pump 615 pumps water to the first spray tower 611 for spraying, the water returns to the first circulation tank 614 through a pipeline, the second spray tower 612 is connected with a second circulation tank 616, the second circulation tank 616 is provided with a second circulation pump 617, the second circulation pump 617 pumps water to the second spray tower 612 for spraying, the water returns to the second circulation tank 616 through a pipeline, the third spray tower 613 is connected with a third circulation tank 619, the third circulation tank 619 is provided with a third circulation pump 618, the third circulation pump 618 pumps water to the third spray tower 613 for spraying, and the water returns to the third circulation tank 619 through a pipeline.
The first spray tower 611, the first circulation tank 614, and the first circulation pump 615 may be regarded as one circulation absorption device, the second spray tower 612, the second circulation tank 616, and the second circulation pump 617 may be regarded as one circulation absorption device, and the third spray tower 613, the third circulation tank 619, and the third circulation pump 618 may be regarded as one circulation absorption device.
In one embodiment, as shown in fig. 2, the first circulation pump 615 is connected to the secondary circulation tank 602, a valve is disposed adjacent to the secondary circulation tank 602, the first circulation pump 615 is used for supplying water into the secondary circulation tank 602, the second circulation pump 617 is connected to the first circulation tank 614, a valve is disposed adjacent to the first circulation tank 614, the second circulation pump 617 is used for supplying water into the first circulation tank 614, the third circulation pump 618 is connected to the second circulation tank 616, a valve is disposed adjacent to the second circulation tank 616, the third circulation pump 618 is used for supplying water into the second circulation tank 616, and a valve is disposed at the third circulation tank 619 for replenishing water.
The ammonia water absorbed by the next-stage spray tower can be pumped into the previous-stage spray tower after a period of time, the ammonia water absorbed by the spray tower is pumped into the second-stage circulating tank 602 to be used as water for absorbing the secondary ammonia, after the ammonia water in the first-stage circulating tank 300 is sent into the recovery tank 500 to be recovered, the second-stage circulating tank 602 conveys the water to the first-stage circulating tank 300 to be supplemented, the third spray tower 613 supplements new water, the stages are advanced and circulated, the water is saved in the whole ammonia recovery process, and the ammonia recovery cost is reduced.
In one embodiment, as shown in fig. 2 and 3, the primary ammonia absorber 100 and the secondary ammonia absorber 601 include a nozzle 702, a throat 704, a negative pressure chamber 703 and an air inlet 701, the nozzle 702 is disposed at the center of the negative pressure chamber 703, the air inlet 701 is connected to the negative pressure chamber 703, the diameter of the throat 704 is increased from small to large, the center of the bottom of the negative pressure chamber 703 is connected to the small-diameter end of the throat 704, the center of the nozzle 702 is aligned to the center of the throat 704, and the ammonia gas mixes with the water ejected from the nozzle 702 in the negative pressure chamber 703 and the throat 704.
The ammonia absorber is actually a Venturi tube, when the ammonia absorber operates, a circulating pump pumps water out of a circulating tank, the circulating pump pumps the water up to a spray pipe 702 of the ammonia absorber, the water is sprayed out at a high speed under the pressure of a pump and enters a throat pipe 704, the pipe diameter of the throat pipe 704 is changed from small to large, the water is sprayed out of the spray pipe 702 and then is released and diffused to form a water column with the diameter changed from small to large, the water column rapidly descends under the combined action of pressure and gravity, in the process, negative pressure is formed in the space around the spray pipe 702, ammonia gas transmitted from a superior system enters a negative pressure chamber 703 of the ammonia absorber through an air inlet 701, the ammonia gas is sucked under the action of the negative pressure and is fully mixed with the water in.
The installation height of the ammonia absorber is more than 15 meters.
In one embodiment, as shown in fig. 2 and 3, the spray pipe 702 of the primary ammonia absorber 100 is connected to the primary circulation pump 400, the throat pipe 704 of the primary ammonia absorber 100 is connected to the cooler 200, and the air inlet 701 of the primary ammonia absorber 100 is connected to a superior system.
In one embodiment, as shown in fig. 2 and 3, the spray pipe 702 of the secondary ammonia absorber 601 is connected with the secondary circulation pump 603, the throat pipe 704 of the secondary ammonia absorber 601 is connected with the secondary circulation tank 602, and the air inlet 701 of the secondary ammonia absorber 601 is connected with the primary circulation tank 300.
It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. An ammonia recovery system which characterized in that: comprises a primary ammonia absorber, the primary ammonia absorber is connected with a cooler for cooling ammonia water flowing out of the primary ammonia absorber, the primary ammonia absorber is connected with a primary circulating tank for providing water for the primary ammonia absorber to absorb ammonia gas, a primary circulating pump for pumping water from the primary circulating tank into the primary ammonia absorber is arranged between the primary ammonia absorber and the primary circulating tank, the cooler is connected with the primary circulating tank and used for conveying the cooled ammonia water to the primary circulating tank, the primary circulating tank is connected with a recovery tank for recovering ammonia water with concentration meeting the recovery standard in the primary circulating tank, the primary circulation tank is connected with a secondary ammonia recovery system, and the secondary ammonia recovery system is used for carrying out secondary ammonia recovery on ammonia and tail gas in the primary circulation tank and discharging the tail gas.
2. An ammonia gas recovery system as defined in claim 1 wherein: the secondary ammonia recovery system comprises a secondary ammonia absorber, the secondary ammonia absorber is connected with the primary circulating tank, and ammonia and tail gas which are not dissolved in water in the primary circulating tank enter the secondary ammonia recovery system from the secondary ammonia absorber.
3. An ammonia gas recovery system as defined in claim 2 wherein: the secondary ammonia absorber is connected with a secondary circulating tank, a secondary circulating pump is arranged between the secondary ammonia absorber and the secondary circulating tank, the secondary circulating pump sucks water from the secondary circulating tank into the secondary ammonia absorber to absorb ammonia gas, and the secondary ammonia absorber discharges the water after absorbing the ammonia gas back to the secondary circulating tank.
4. An ammonia gas recovery system as defined in claim 3 wherein: the second grade circulation tank with the first-level circulation tank links to each other, be equipped with between the second grade circulation tank with the first-level circulation tank the second grade circulating pump, be close to the first-level circulation tank is equipped with the valve, the water in the first-level circulation tank is gone into to the recovery pond, the second grade circulating pump will water in the second grade circulation tank supplyes to the first-level circulation tank, the second grade circulation tank directly supplyes the clear water.
5. An ammonia gas recovery system as defined in claim 3 wherein: the second-stage ammonia recovery system comprises a first spray tower, a second spray tower and a third spray tower, the first spray tower is connected with the second spray tower, the second spray tower is connected with the third spray tower, the second-stage circulating tank is connected with the first spray tower, and unabsorbed ammonia and tail gas in the second-stage circulating tank are discharged from the third spray tower after being absorbed by the first spray tower, the second spray tower and the third spray tower.
6. An ammonia gas recovery system as defined in claim 5 wherein: the first spray tower is connected with a first circulation tank, the first circulation tank is provided with a first circulation pump, the first circulation pump takes water up the first spray tower sprays, water returns to the first circulation tank through a pipeline, the second spray tower is connected with a second circulation tank, the second circulation tank is provided with a second circulation pump, the second circulation pump takes water up the second spray tower sprays, water returns to the second circulation tank through a pipeline, the third spray tower is connected with a third circulation tank, the third circulation tank is provided with a third circulation pump, the third circulation pump takes water up the third spray tower sprays, and water returns to the third circulation tank through a pipeline.
7. An ammonia gas recovery system as defined in claim 6 wherein: the first circulating pump with the second grade circulation jar links to each other, is close to the second grade circulation jar is equipped with the valve, the first circulating pump is used for infusing water the second grade circulation jar, the second circulating pump with the first circulation jar links to each other, is close to the first circulation jar is equipped with the valve, the second circulating pump is used for infusing water the first circulation jar, the third circulating pump with the second circulation jar links to each other, is close to the second circulation jar is equipped with the valve, the third circulating pump is used for infusing water the second circulation jar, the third circulation jar is equipped with the valve for make-up water.
8. An ammonia gas recovery system as defined in claim 3 wherein: the primary ammonia absorber and the secondary ammonia absorber comprise a spray pipe, a throat pipe, a negative pressure chamber and an air inlet, the spray pipe 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 pipe 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 pipe, the center of the spray pipe is aligned with the center of the throat pipe, and ammonia gas is mixed with water flow sprayed out of the spray pipe in the negative pressure chamber and the throat pipe.
9. An ammonia gas recovery system as defined in claim 8 wherein: the spray pipe of the first-stage ammonia absorber is connected with the first-stage circulating pump, the throat pipe of the first-stage ammonia absorber is connected with the cooler, and the air inlet of the first-stage ammonia absorber is connected with a superior system.
10. An ammonia gas recovery system as defined in claim 8 wherein: and a spray pipe of the secondary ammonia absorber is connected with the secondary circulating pump, a throat pipe of the secondary ammonia absorber is connected with the secondary circulating tank, and an air inlet of the secondary ammonia absorber is connected with the primary circulating tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859439.4U CN211537145U (en) | 2019-10-31 | 2019-10-31 | Ammonia recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921859439.4U CN211537145U (en) | 2019-10-31 | 2019-10-31 | Ammonia recovery system |
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| Publication Number | Publication Date |
|---|---|
| CN211537145U true CN211537145U (en) | 2020-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921859439.4U Active CN211537145U (en) | 2019-10-31 | 2019-10-31 | Ammonia recovery system |
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| CN (1) | CN211537145U (en) |
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2019
- 2019-10-31 CN CN201921859439.4U patent/CN211537145U/en active Active
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