CN212039750U

CN212039750U - Ammonia absorption system

Info

Publication number: CN212039750U
Application number: CN202020312102.8U
Authority: CN
Inventors: 梁鹤贤; 陈升; 刘优强; 张敏平
Original assignee: Shaoguan Kaihong Nano Material Co ltd
Current assignee: Shaoguan Kaihong Nano Material Co ltd
Priority date: 2020-03-13
Filing date: 2020-03-13
Publication date: 2020-12-01
Anticipated expiration: 2030-03-13

Abstract

The utility model relates to the technical field of ammonia recovery equipment, and discloses an ammonia absorption system, which comprises a first spray tower, a second spray tower, a third spray tower, a first circulating tank, a second circulating tank and a third circulating tank, wherein the first spray tower, the second spray tower and the third spray tower are connected in sequence; a first circulating pump for pumping water to a first spray tower for spraying is arranged on the first circulating tank, a first return water pipeline for returning water is connected between the first spray tower and the first circulating tank, a second circulating pump for pumping water to a second spray tower for spraying is arranged on the second circulating tank, and a third circulating pump for pumping water to a third spray tower for spraying is arranged on the third circulating tank; the first circulation tank is connected with a first-stage ammonia absorption assembly, and the second circulation tank is connected with a second-stage ammonia absorption assembly. The utility model discloses can improve the ammonia absorption effect that sprays the ammonia absorption process.

Description

Ammonia absorption system

Technical Field

The utility model relates to an ammonia recovery equipment technical field especially relates to an ammonia absorption system.

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.

The ammonia gas is usually recovered by utilizing the principle that the ammonia gas is easily dissolved in water, and the existing ammonia absorption device has a process of absorbing ammonia by adopting spraying, but the ammonia absorption efficiency is low by only adopting the ammonia absorption process of spraying.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an ammonia absorption system can improve the ammonia absorption effect that sprays the ammonia absorption process.

In order to achieve the purpose, the utility model provides an ammonia absorption system, which comprises a first spray tower, a second spray tower, a third spray tower, a first circulating tank, a second circulating tank and a third circulating tank, wherein the first spray tower, the second spray tower and the third spray tower are connected in sequence, and ammonia gas is absorbed by the first spray tower, the second spray tower and the third spray tower and then discharged from the third spray tower;

a first circulating pump for pumping water to the first spray tower for spraying is arranged on the first circulating tank, a first return water pipeline for returning water is connected between the first spray tower and the first circulating tank, a second circulating pump for pumping water to the second spray tower for spraying is arranged on the second circulating tank, a second return water pipeline for returning water is connected between the second spray tower and the second circulating tank, a third circulating pump for pumping water to the third spray tower for spraying is arranged on the third circulating tank, and a third return water pipeline for returning water is connected between the third spray tower and the third circulating tank;

the first circulation tank is connected with a first-stage ammonia absorption assembly, the second circulation tank is connected with a second-stage ammonia absorption assembly, and the third circulation tank is connected with a recovery tank for recovering the ammonia in the third circulation tank according with the recovery standard concentration.

As a preferred scheme, a first circulating pipeline is connected between the first circulating pump and the second circulating tank, a first valve is arranged near the first circulating pump, the first circulating pump is used for conveying water into the second circulating tank, a second circulating pipeline is connected between the second circulating pump and the third circulating tank, a second valve is arranged near the second circulating pump, and the second circulating pump is used for conveying water into the third circulating tank.

As preferred scheme, the one-level ammonia absorption assembly includes the one-level ammonia absorber, the one-level ammonia absorber is connected with and is used for cooling the cooler of the aqueous ammonia that the one-level ammonia absorber flows out, first circulation tank with be equipped with between the one-level ammonia absorber and be used for following water first circulation tank suction the first elevator pump of one-level ammonia absorber, the cooler with first circulation tank links to each other.

Preferably, the secondary ammonia absorption assembly comprises a secondary ammonia absorber, the secondary ammonia absorber is connected with the second circulation tank, and a second lift pump for pumping water from the second circulation tank into the secondary ammonia absorber is arranged between the second circulation tank and the secondary ammonia absorber.

Preferably, 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 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 primary ammonia absorber is connected with the first lift 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.

Preferably, a spray pipe of the secondary ammonia absorber is connected with the second lift pump, a throat pipe of the secondary ammonia absorber is connected with the second circulation tank, and an air inlet of the secondary ammonia absorber is connected with the second circulation tank.

The utility model provides an ammonia absorption system has following beneficial effect:

1. ammonia is sprayed and absorbed in sequence through the first spray tower, the second spray tower and the third spray tower, and ammonia gas is absorbed by the first spray tower, the second spray tower and the third spray tower and then is discharged from the third spray tower, so that the ammonia spraying and absorbing effect on the ammonia gas can be ensured;

2. the first circulation tank is connected with a primary ammonia absorption assembly, ammonia is absorbed again through the primary ammonia absorption assembly, and the ammonia concentration in the first circulation tank is improved; the second circulation tank is connected with a secondary ammonia absorption assembly, ammonia is absorbed again through the secondary ammonia absorption assembly, the ammonia concentration in the second circulation tank is further improved, and water in the first circulation tank and the second circulation tank can absorb ammonia fully;

3. the water of inhaling ammonia loops through first circulation tank, second circulation tank and third circulation tank, and the third spray column further sprays and inhales the ammonia, improves the discharged aqueous ammonia concentration of third circulation tank, has wholly improved the effect of spraying and inhaling the ammonia.

Drawings

FIG. 1 is a schematic structural view of an ammonia absorption system in an embodiment of the present invention;

FIG. 2 is a schematic structural view of a primary ammonia absorber and a secondary ammonia absorber in an embodiment of the present invention;

fig. 3 is a schematic front view of a cooler according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view of a cooler in an embodiment of the present invention;

fig. 5 is a schematic structural view of a first circulation tank in an embodiment of the present invention;

in the figure, 110, a first spray tower; 111. a first circulation tank; 112. a first circulation pump; 113. a first water return pipeline; 114. a first circulation pipe; 115. a first valve; 210. a second spray tower; 211. a second recycle tank; 212. a second circulation pump; 213. a second water return pipe; 214. a second circulation pipe; 215. a second valve; 310. a third spray tower; 311. a third circulation tank; 312. a third circulation pump; 313. a third water return pipe; 410. a primary ammonia absorption assembly; 411. a primary ammonia absorber; 412. A cooler; 413. a first lift pump; 420. a secondary ammonia absorption component; 421. a secondary ammonia absorber; 423. a second lift pump; 510. a nozzle; 520. a throat; 530. a negative pressure chamber; 540. an air inlet; 610. a recovery tank; 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 5, the ammonia absorption system according to the preferred embodiment of the present invention can improve the ammonia absorption effect of the spray ammonia absorption.

Based on the above technical solution, the present embodiment provides an ammonia absorption system, including a first spray tower 110, a second spray tower 210, a third spray tower 310, a first circulation tank 111, a second circulation tank 211, and a third circulation tank 311, wherein the first spray tower 110, the second spray tower 210, and the third spray tower 310 absorb ammonia by spraying ammonia absorption water to the internal ammonia.

Specifically, the first spray tower 110, the second spray tower 210 and the third spray tower 310 are connected in sequence, an ammonia gas pipeline is connected between the first spray tower 110, the second spray tower 210 and the third spray tower 310, ammonia gas is exhausted from the third spray tower 310 after being absorbed by the first spray tower 110, the second spray tower 210 and the third spray tower 310, and ammonia is absorbed by the first spray tower 110, the second spray tower 210 and the third spray tower 310 in a grading manner, so that the absorption effect of the ammonia gas entering the first spray tower 110 can be ensured.

Specifically, the first circulation tank 111 is provided with a first circulation pump 112 for pumping water to the first spray tower 110 for spraying, a first return water pipe 113 for returning water is connected between the first spray tower 110 and the first circulation tank 111, and the water returns to the first circulation tank 111 through the first return water pipe 113.

As shown in fig. 5, the first circulation tank 111, the second circulation tank 211 and the third circulation tank 311 have the same structure, and include a tank body, an exhaust pipe and a water inlet pipe disposed at the top of the tank body, and a drain pipe disposed at the bottom of the tank body.

Specifically, a second circulation pump 212 for pumping water to the second spray tower 210 for spraying is disposed on the second circulation tank 211, a second water return pipe 213 for returning water is connected between the second spray tower 210 and the second circulation tank 211, and the water returns to the second circulation tank 211 through the second water return pipe 213.

Specifically, a third circulation pump 312 for pumping water to the third spray tower 310 to spray is disposed on the third circulation tank 311, a third water return pipe 313 for returning water is connected between the third spray tower 310 and the third circulation tank 311, and the water returns to the third circulation tank 311 through the third water return pipe 313.

Here, the first spray tower 110, the first circulation tank 111, and the first circulation pump 112 are regarded as one circulation ammonia absorbing device spray ammonia absorption. The second spray tower 210, the second circulation tank 211 and the second circulation pump 212 are regarded as a circulating ammonia absorption device for spraying ammonia absorption. The third spray tower 310, the third recycle tank 311 and the third recycle pump 312 are regarded as a circulating ammonia absorption device for spraying ammonia absorption.

Specifically, be connected with the one-level on the first circulation tank 111 and inhale ammonia subassembly 410, inhale the concentration that ammonia water can improve among the first circulation tank 111 through the one-level and inhale ammonia subassembly 410, be connected with the second grade on the second circulation tank 211 and inhale ammonia subassembly 420, inhale the concentration that ammonia water can improve among the second circulation tank 211 through the second grade and inhale ammonia subassembly 420.

Specifically, the third circulation tank 311 is connected with a recovery tank 610 for recovering the ammonia water in the third circulation tank 311, wherein the concentration of the ammonia water in the third circulation tank 311 reaches the standard, and the concentrated ammonia water can be uniformly contained in the third circulation tank 311 through the recovery tank 610.

Preferably, a first circulation pipe 114 is connected between the first circulation pump 112 and the second circulation tank 211, a first valve 115 is disposed near the first circulation pump 112, the first circulation pump 112 is used for conveying water into the second circulation tank 211, a second circulation pipe 214 is connected between the second circulation pump 212 and the third circulation tank 311, a second valve 215 is disposed near the second circulation pump 212, and the second circulation pump 212 is used for conveying water into the third circulation tank 311. Can connect gradually first circulation tank 111, second circulation tank 211 and third circulation tank 311 through first circulating line 114, second circulating line 214 for aqueous ammonia in first circulation tank 111 promotes the concentration once more in second circulation tank 211, and the aqueous ammonia in second circulation tank 211 promotes the concentration once more in third circulation tank 311, and then whole improvement sprays the effect of inhaling ammonia.

Preferably, the primary ammonia absorption assembly 410 comprises a primary ammonia absorber 411, the primary ammonia absorber 411 is connected with a cooler 412 for cooling ammonia water flowing out of the primary ammonia absorber 411, a first lift pump 413 for pumping water from the first circulation tank 111 into the primary ammonia absorber 411 is arranged between the first circulation tank 111 and the primary ammonia absorber 411, and the cooler 412 is connected with the first circulation tank 111. The first lift pump 413 is capable of pumping water up to a lift height.

The temperature of the ammonia water in the system can be uniformly reduced through the cooler 412.

Preferably, as shown in fig. 2 and 3, the cooler 412 includes an inner tube 741 and a medium tube 743, the inner tube 741 is sleeved in the medium tube 743, the medium tube 743 is used for passing cold water, the inner tube 741 is used for passing ammonia water, and the medium tube 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 thermal insulation layer 747 is rigid polyurethane foam, and has excellent thermal insulation effect.

Preferably, the secondary ammonia absorption assembly 420 comprises a secondary ammonia absorber 421, the secondary ammonia absorber 421 is connected to the second circulation tank 211, and a second lift pump 423 for pumping water from the second circulation tank 211 into the secondary ammonia absorber 421 is arranged between the second circulation tank 211 and the secondary ammonia absorber 421. The second lift pump 423 is capable of pumping water up to the lift height.

Preferably, the primary ammonia absorber 411 and the secondary ammonia absorber 421 include a nozzle 510, a throat 520, a negative pressure chamber 530 and an air inlet 540, the nozzle 510 is disposed at the center of the negative pressure chamber 530, the air inlet 540 is connected to the negative pressure chamber 530, the diameter of the throat 520 is increased from small to large, the center of the bottom of the negative pressure chamber 530 is connected to the small-diameter end of the throat 520, the center of the nozzle 510 is aligned to the center of the throat 520, and the ammonia gas is mixed with the water flow ejected from the nozzle 510 in the negative pressure chamber 530 and the throat 520.

The primary ammonia absorber 411 and the secondary ammonia absorber 421 are actually venturi tubes, when the ammonia absorber operates, the pump pumps water into the spray pipe 510 of the primary ammonia absorber 411 and the secondary 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 the ammonia gas, the mixture of the ammonia gas and the water enters the throat 520, the pipe diameter of the throat 520 is changed from small to large, the water flow is sprayed out of the throat 520 and then is decompressed and diffused 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, according to the venturi effect, negative pressure is formed in the throat 520, the ammonia gas is rapidly absorbed by the water in the throat 520, and rapid ammonia absorption is achieved.

The installation heights of the first-stage ammonia absorber 411 and the second-stage ammonia absorber 421 are 12-15 m, long straight pipes are installed at the bottoms of the first-stage ammonia absorber 411 and the second-stage ammonia absorber 421, and the power for descending ammonia water is provided by using gravity, so that the phenomenon that the first-stage ammonia absorber 411 and the second-stage ammonia absorber 421 suck the ammonia water in the long straight pipes at the bottoms of the first-stage ammonia absorber 411 and the second-stage ammonia absorber 421 when ammonia is absorbed in the first-stage ammonia absorber 411 and the second-stage ammonia absorber 421 is avoided.

Preferably, the spray pipe 510 of the primary ammonia absorber 411 is connected to the first lift pump 413, the throat 520 of the primary ammonia absorber 411 is connected to the cooler 412, and the air inlet 540 of the primary ammonia absorber 411 is connected to the upper-level system, where the primary ammonia absorber 411 absorbs ammonia from the upper-level system, so as to greatly increase the ammonia concentration in the first circulation tank 111.

Preferably, the spray pipe 510 of the secondary ammonia absorber 421 is connected to the second lift pump 423, the throat 520 of the secondary ammonia absorber 421 is connected to the second circulation tank 211, and the air inlet 540 of the secondary ammonia absorber 421 is connected to the second circulation tank 211, where the secondary ammonia absorber 421 absorbs ammonia from the ammonia gas escaping from the second circulation tank 211, so that the ammonia gas in the second circulation tank 211 is fully absorbed, and the ammonia water concentration in the second circulation tank 211 is further increased.

And finally, the ammonia water is sprayed and absorbed in the circulating ammonia absorption equipment consisting of the third spray tower 310, the third circulating tank 311 and the third circulating pump 312, the concentration of the ammonia water in the third circulating tank 311 is further improved, and after the concentration of the ammonia water in the third circulating tank 311 reaches the standard, the concentrated ammonia water can be uniformly contained in the third circulating tank through the recovery tank 610.

To sum up, the utility model discloses a high-order ammonia absorber is supplementary, can improve the effect that sprays the ammonia of inhaling, guarantees to spray that the ammonia concentration that the ammonia process of inhaling obtained is up to standard.

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

1. An ammonia absorption system is characterized by comprising a first spray tower, a second spray tower, a third spray tower, a first circulating tank, a second circulating tank and a third circulating tank, wherein the first spray tower, the second spray tower and the third spray tower are sequentially connected, and ammonia gas is absorbed by the first spray tower, the second spray tower and the third spray tower and then discharged from the third spray tower;

2. The ammonia absorption system according to claim 1, wherein a first circulation pipe is connected between the first circulation pump and the second circulation tank, a first valve is provided near the first circulation pump, the first circulation pump is configured to feed water into the second circulation tank, a second circulation pipe is connected between the second circulation pump and the third circulation tank, a second valve is provided near the second circulation pump, and the second circulation pump is configured to feed water into the third circulation tank.

3. The ammonia absorption system as claimed in claim 2, wherein the primary ammonia absorption assembly comprises a primary ammonia absorber, a cooler for cooling the ammonia water flowing out of the primary ammonia absorber is connected to the primary ammonia absorber, a first lift pump for pumping water from the first circulation tank into the primary ammonia absorber is arranged between the first circulation tank and the primary ammonia absorber, and the cooler is connected to the first circulation tank.

4. An ammonia absorption system as claimed in claim 3, wherein the secondary ammonia absorption assembly comprises a secondary ammonia absorber connected to the second circulation tank, and a second lift pump is provided between the second circulation tank and the secondary ammonia absorber for pumping water from the second circulation tank into the secondary ammonia absorber.

5. The ammonia absorption system according to claim 4, wherein the primary ammonia absorber and the secondary 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 diameter of the throat is increased 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.

6. An ammonia absorption system as claimed in claim 5, wherein the nozzle of said primary ammonia absorber is connected to said first lift pump, the throat of said primary ammonia absorber is connected to said cooler, and the air inlet of said primary ammonia absorber is connected to a superior system.

7. An ammonia absorption system as claimed in claim 6, wherein the spray pipe of said secondary ammonia absorber is connected to said second lift pump, the throat of said secondary ammonia absorber is connected to said second recycle tank, and the air inlet of said secondary ammonia absorber is connected to said second recycle tank.