CN202823116U - Device for recovering ammonia in waste gas - Google Patents
Device for recovering ammonia in waste gas Download PDFInfo
- Publication number
- CN202823116U CN202823116U CN 201220536749 CN201220536749U CN202823116U CN 202823116 U CN202823116 U CN 202823116U CN 201220536749 CN201220536749 CN 201220536749 CN 201220536749 U CN201220536749 U CN 201220536749U CN 202823116 U CN202823116 U CN 202823116U
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- membrane module
- waste gas
- ammonia
- reservoir
- liquid pump
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Abstract
The utility model discloses a device for recovering ammonia in waste gas. The device comprises a film assembly, a liquid pump, a liquid storage tank, a liquid preparation pool, a dilute acid overhead tank, a crystallizer and a centrifugal machine, wherein the dilute acid overhead tank is connected with the liquid storage tank through the liquid preparation pool; the liquid storage tank is communicated with a shell pass inlet of the film assembly through the liquid pump; and a shell pass outlet of the film assembly is sequentially connected with the crystallizer and the centrifugal machine. The ammonia is recovered by utilizing the film method separation technology, the device is high in efficiency and low in energy consumption, the treated tail gas meets the emission standard, the recovered ammonia can be converted into an ammonium salt product, and the resource utilization of the ammonium is effectively realized.
Description
Technical field
The utility model relates to the membrane separation technique field, is specifically related to the device that a kind of embrane method reclaims ammonia in the waste gas.
Background technology
In the waste gas of the generations such as medical compound probability, nitrogenous production enterprise and ammonia synthesizing industry, often contain NH
3, before these waste gas are discharged, must carry out purified treatment, remove NH wherein
3, to satisfy environmental emission standard.NH in the waste gas
3Removing and recovery, usually adopt WATER-WASHING METHOD and diluted acid neutralisation.WATER-WASHING METHOD is easy to operate, effect still can, but equipment is huge, invests greatlyr, but also produces a large amount of unserviceable weak aqua ammonias, these weak aqua ammonias also need the processing of wastewater treatment equipment to discharge, and not only cause NH
3The wasting of resources, and the load of increase wastewater treatment equipment; The diluted acid neutralisation adopts tower kind equipment (such as packed tower etc.), exists equipment corrosion serious, and investment and plant maintenance are high, the high grade of running cost series of problems.
Summary of the invention
The purpose of this utility model is the defective that exists in the prior art in order to solve, and a kind of device that can effectively carry out the ammonia recycling is provided.
In order to achieve the above object, the utility model provides the retracting device of ammonia in a kind of waste gas, comprises membrane module, liquid pump, reservoir, dosing pond, diluted acid head tank, crystallizer and centrifuge; The diluted acid head tank links to each other with reservoir by the dosing pond; Reservoir is connected with the shell side entrance of membrane module by liquid pump; The shell side outlet of membrane module links to each other with crystallizer, centrifuge successively.
Wherein, centrifuge links to each other with the dosing pond, and the mother liquor that centrifugation can be obtained prepares dilute acid soln by dosing, thereby carries out recycling.
Said apparatus also comprises surge tank; Waste gas passes into the tube side of membrane module by surge tank.
Membrane module is two series connection, comprises membrane module I and membrane module II; Reservoir is connected with the shell side entrance of membrane module I by liquid pump; The shell side outlet of membrane module I links to each other with crystallizer, centrifuge successively; The shell side outlet of membrane module II links to each other with reservoir.
The utility model has the following advantages compared to existing technology: utilize the membrane separating technology to reclaim ammonia, efficient is high, energy consumption is little, and the tail gas after the processing satisfies discharge standard, and the ammonia that reclaims can be converted into ammonium salt product, effectively realizes the recycling of ammonia.The retracting device of ammonia in the utility model waste gas utilizes two groups of membrane module series connection, and more abundant to the recovery of ammonia, dilute acid soln can reuse simultaneously, reduces cost.The technique that the utility model reclaims ammonia is simple, install easy to operate, energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the structural representation of the retracting device of ammonia in the utility model waste gas.
Among the figure, 1-surge tank, 2-membrane module I, 3-membrane module II, 4-liquid pump, 5-reservoir, 6-diluted acid head tank, 7-dosing pond, 8-crystallizer, 9-centrifuge, a-waste gas, b-tail gas, c-ammonium salt solution, d-ammonium salt, e-mother liquor.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is elaborated.
The device that the utility model embrane method reclaims ammonia in the waste gas is comprised of film separation and ammonia resource two parts, and wherein the film separating part comprises two groups of membrane modules: membrane module I 2 and membrane module II 3, surge tank 1, reservoir 5 and liquid pump 4; The ammonia resource partly comprises multiple high-efficiency mould 8, self-tipping type centrifuge 9, diluted acid head tank 6 and dosing pond 7.
Waste gas a passes into the tube side of membrane module I 2 and membrane module II 3 successively by surge tank 1; Dilute acid soln passes through respectively the shell side of membrane module I 2 and membrane module II 3.Diluted acid head tank 6 links to each other with reservoir 5 by dosing pond 7.Reservoir 5 is connected with the shell side entrance of membrane module I 2 and membrane module II 3 respectively by liquid pump 4.The shell side outlet of membrane module I 2 links to each other with crystallizer 8, centrifuge 9 successively.The shell side outlet of membrane module II 3 links to each other with reservoir 5, and the shell side that pumps into membrane module I 2 by liquid pump 4 carries out recycling.Centrifuge 9 links to each other with dosing pond 7, and the mother liquor e that centrifugation can be obtained prepares dilute acid soln by dosing, again pass into carry out in the reservoir 5 recycling.
During use, gas flow process (tube side): contain NH
3Waste gas a enters surge tank 1 after metering, and the waste gas after steadily enters membrane module I 2, NH by membrane module upper end air inlet
3By the fenestra diffusion, enter in the olefin(e) acid solution in doughnut, reaction generates ammonium salt solution c, and the waste gas after the processing leaves membrane module I 2 from the gas outlet, lower end, and then enters membrane module II 3 from the upper end air inlet of membrane module II 3, remains NH in the waste gas
3Further absorbed and process, the tail gas b after processing at last leaves membrane module II 3 from the gas outlet, lower end, by emptying.
Liquid flow (shell side): beat to the diluted acid head tank 6 dilute acid soln of preparation stand-by.During work, dilute acid soln is put into dosing pond 7, the concentration of dilute acid soln and the amount of putting into are determined (seeing Table 1) according to concrete working condition.Dilute acid soln in the dosing pond 7 is put into reservoir 5, starts liquid pump 4, and the flow of liquid pump 4 is determined according to gas liquid ratio.Dilute acid soln is drawn from reservoir 5 by liquid pump 4, and dilute acid soln is divided into two strands of sizes in proportion, and large burst of amount enters membrane module I 2, and the shallow bid amount enters membrane module II 3, absorbs respectively the NH that diffusion is come
3, reaction generates ammonium salt.Dilute acid soln from the ammonium salt-containing of membrane module II 3 directly enters reservoir 5, forms the absorption operation closed circuit: liquid pump-membrane module II 3-reservoir.The ammonium salt solution c that forms at membrane module I 2 shell sides enters multiple high-efficiency mould 8, at this condensing crystallizing.The mother liquor that contains ammonium salt crystallization enters self-tipping type centrifuge 9, carries out Separation of Solid and Liquid, and crystallization is ammonium salt d solid product; Mother liquor e after the separation enters dosing pond 7, carry out dosing with the diluted acid from diluted acid head tank 6, dilute acid soln after the dosing enters reservoir 5, liquid pump 4 forms absorption-crystallization-dosing operation cycle loop: liquid pump-membrane module I-multiple high-efficiency mould-self-tipping type centrifuge-dosing pond-reservoir.
The utility model embrane method reclaims NH in the waste gas
3Device, can effectively process the various NH of containing
3Waste gas, the tail gas component behind the deamination satisfies waste gas emission standard, the NH of recovery
3Be converted into ammonium salt product, realize NH
3Resource.
Technological parameter sees Table 1, and gas flow process and liquid flow are with embodiment 1.
Technological parameter sees Table 1, and gas flow process and liquid flow are with embodiment 1.
Technological parameter sees Table 1, and gas flow process and liquid flow are with embodiment 1.
Technological parameter sees Table 1, and gas flow process and liquid flow are with embodiment 1.
Effect embodiment
Tail gas b to embodiment of the method 1 to embodiment 5 detects, and the result is as shown in the table:
The technological parameter of each embodiment of table 1 and detection effect
Can find out from the various operating mode measurement results of table 1, utilize the utility model to carry out NH in the waste gas
3Recovery and recycling, can effectively reclaim NH in the waste gas
3, the tail gas component satisfies waste gas emission standard, the NH of recovery
3Be converted into ammonium salt product, realize NH
3Resource, technique is simple, and is easy to operate, with low cost.
Claims (4)
1. the retracting device of ammonia in the waste gas is characterized in that: comprise membrane module, liquid pump, reservoir, dosing pond, diluted acid head tank, crystallizer and centrifuge; Described diluted acid head tank links to each other with described reservoir by the dosing pond; Described reservoir is connected with the shell side entrance of described membrane module by described liquid pump; The shell side outlet of described membrane module links to each other with described crystallizer, centrifuge successively.
2. retracting device according to claim 1, it is characterized in that: described centrifuge links to each other with described dosing pond.
3. retracting device according to claim 1, it is characterized in that: described device also comprises surge tank; Described waste gas passes into the tube side of described membrane module by surge tank.
4. retracting device according to claim 1, it is characterized in that: described membrane module is two series connection, comprises membrane module I and membrane module II; Described reservoir is connected with the shell side entrance of described membrane module I by liquid pump; The shell side outlet of described membrane module I links to each other with described crystallizer, centrifuge successively; The shell side outlet of described membrane module II links to each other with described reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536749 CN202823116U (en) | 2012-10-19 | 2012-10-19 | Device for recovering ammonia in waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220536749 CN202823116U (en) | 2012-10-19 | 2012-10-19 | Device for recovering ammonia in waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202823116U true CN202823116U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220536749 Expired - Fee Related CN202823116U (en) | 2012-10-19 | 2012-10-19 | Device for recovering ammonia in waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202823116U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872685A (en) * | 2012-10-19 | 2013-01-16 | 南京信息工程大学 | Method and device for recovering ammonia gas from waste gas through membrane method |
-
2012
- 2012-10-19 CN CN 201220536749 patent/CN202823116U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102872685A (en) * | 2012-10-19 | 2013-01-16 | 南京信息工程大学 | Method and device for recovering ammonia gas from waste gas through membrane method |
| CN102872685B (en) * | 2012-10-19 | 2015-03-25 | 南京信息工程大学 | Method and device for recovering ammonia gas from waste gas through membrane method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20141019 |
|
| EXPY | Termination of patent right or utility model |