CN107875812A - A kind of device and method of ammonia washing - Google Patents

A kind of device and method of ammonia washing Download PDF

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Publication number
CN107875812A
CN107875812A CN201711138697.9A CN201711138697A CN107875812A CN 107875812 A CN107875812 A CN 107875812A CN 201711138697 A CN201711138697 A CN 201711138697A CN 107875812 A CN107875812 A CN 107875812A
Authority
CN
China
Prior art keywords
ammonia
washed
tail gas
acid
circulating slot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711138697.9A
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Chinese (zh)
Inventor
贺井峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
DAZHOU WENGFU LANJIAN CHEMICAL Co Ltd
Original Assignee
DAZHOU WENGFU LANJIAN CHEMICAL Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by DAZHOU WENGFU LANJIAN CHEMICAL Co Ltd filed Critical DAZHOU WENGFU LANJIAN CHEMICAL Co Ltd
Priority to CN201711138697.9A priority Critical patent/CN107875812A/en
Publication of CN107875812A publication Critical patent/CN107875812A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18—Absorbing units; Liquid distributors therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1425—Regeneration of liquid absorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10—Inorganic absorbents

Abstract

The invention belongs to ammonia washing absorption technical field, specifically discloses a kind of device and method of ammonia washing, and device includes neutralizing tank, washed for ammonia；Tail gas absorption mechanism, absorbed for ammonia in the tail gas to neutralizing tank；Ammonia washes sour circulating slot, for supplying ammonia washing or ammonia absorption acid into neutralizing tank, tail gas absorption mechanism respectively；And for receiving the phegma after tail gas absorption mechanism absorbs ammonia；Ammonia washes acid storage tank, and acid is washed for washing supply ammonia in sour circulating slot to ammonia.The ammonia of the present invention washes wash mill and method, can realize that ammonia is washed acid and recycled, and reaches to reduce and changes the workload that ammonia washes acid, improves ammonia assimilation effect, having prevents from crystallizing and blocking pipeline effect.

Description

A kind of device and method of ammonia washing
Technical field
The invention belongs to ammonia washing absorption technical field, and in particular to a kind of ammonia wash mill and method.
Background technology
At present, the washing of ammonia mainly carries out neutralization reaction by phosphoric acid,diluted and liquefied ammonia, so as to be neutralized to ammonia Washing.
The unreacted liquefied ammonia in part of neutralization reaction then after gasification with tail gas discharge is neutralized, recycles pickling mechanism, right Ammonia in tail gas carries out pickling absorption, and the liquid portion after pickling flows back, as pickle, recycled again, so with The continuous progress that pickling absorbs, the pH of pickle are also constantly being raised, it is therefore desirable to which pickle is changed in timing, reduces pickle PH value, to ensure the effect of pickling absorption.
Above-mentioned existing ammonia washing methods, it is big workload to be present, the problem of ammonia assimilation effect difference.
The content of the invention
The first object of the present invention is, for problems of the prior art, there is provided a kind of device of ammonia washing, Washing part can will be neutralized to be combined with pickling absorption part, the pH value that pickling absorption is effectively ensured maintains relatively low scope, Pickle is changed without timing, reduces workload, ammonia assimilation effect is more preferable.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of device of ammonia washing, including
Neutralizing tank, washed for ammonia；
Tail gas absorption mechanism, absorbed for ammonia in the tail gas to neutralizing tank；
Ammonia washes sour circulating slot, absorbs and uses for supplying ammonia washing or ammonia into neutralizing tank, tail gas absorption mechanism respectively Acid；And for receiving the phegma after tail gas absorption mechanism absorbs ammonia；
Ammonia washes acid storage tank, and acid is washed for washing supply ammonia in sour circulating slot to ammonia.
As preferable technical scheme,
Described tail gas absorption mechanism includes Venturi tube and gas-liquid separation tower,
The arrival end of the Venturi tube connects neutralizing tank respectively and ammonia washes sour circulating slot, for the reaction end gas to neutralizing tank In ammonia absorbed；
Described gas-liquid separation tower and the end of Venturi tube connect, for the phegma after separation of ammonia aspiration；Gas-liquid point Circulating slot is washed with ammonia to be connected, sour circulating slot is washed for phegma to be back into ammonia from tower.
The second object of the present invention is, for problems of the prior art, there is provided a kind of method of ammonia washing, Washing process can will be neutralized to be combined with pickling absorption process, the pH value that pickling absorption is effectively ensured maintains relatively low scope, Pickle is changed without timing, reduces workload, ammonia assimilation effect is more preferable.
To achieve these goals, the technical solution adopted by the present invention is：
A kind of method of ammonia washing, comprises the following steps：
Ammonia, which washes sour circulating slot ammonia is washed into acid, to be passed through in neutralizing tank, and liquefied ammonia is washed using neutralization reaction principle；Neutralize The tail gas of neutralization reaction is passed into tail gas absorption mechanism in tank, and the ammonia that sour circulating slot supply is washed using ammonia washes acid to ammonia in tail gas Absorbed, the liquid portion after absorption is back to ammonia and washed in sour circulating slot, and ammonia, which is washed acid storage tank and washed to ammonia in sour circulating slot, to be supplemented Eo-acid.
As preferable technical scheme,
Wherein, described tail gas absorption mechanism includes Venturi tube and gas-liquid separation tower；
Tail gas after neutralizing tank neutralization reaction is passed into Venturi tube in tail gas absorption mechanism, the ammonia in tail gas in Venturi tube The ammonia that sour circulating slot supply is washed by ammonia washes sour absorption, and gas-liquid mixture is separated by gas-liquid separation tower after absorption, after separation Liquid portion is back to ammonia and washed in sour circulating slot.
As preferable technical scheme,
What ammonia washed acid storage tank storage is the phosphoric acid that mass concentration is 85%.
By adopting the above-described technical solution, the beneficial effects of the invention are as follows：
The present invention will neutralize washing and ammonia is washed absorption and is combined, and neutralization washing washes absorption acid with acid and ammonia can lead to Cross ammonia and sour circulating slot offer is provided, and ammonia is washed and eo-acid is constantly filled into sour circulating slot, does not have to timing and changes, can be effective Reduce workload；
And ammonia is washed in sour circulating slot and constantly fills into eo-acid, then can keep ammonia wash absorb with the sour pH value moment maintain compared with Low scope, ensure that ammonia washes absorption and has more preferable ammonia assimilation effect；
Ammonia is washed sour circulating slot and can washed ammonia after phegma adds eo-acid caused by absorption, as the neutralization for neutralizing washing With acid, collect, therefore can utilize by neutralizing washing in pickling circulation in and after the completion of washing in the form of neutralizer Phegma, alternate cycles utilization is realized, and eliminating needs timing replacing ammonia to wash the work that ammonia in circulating slot washes acid, this is existing Some ammonia washes the effect that absorption system is unable to reach；
Existing ammonia, which is washed, can also produce a small amount of crystalline solid in absorption process, strength of fluid after ammonia is washed during this is not The crystalline solid that disconnected raising is then formed then can be more and more, cause the blocking of conveyance conduit, washed by using the neutralization of the application After ammonia is washed and absorbs the mode that is combined, can by neutralize washing constantly to consume the liquid after ammonia is washed and it is caused on a small quantity Crystalline solid, so as to avoid the problem of crystalline solid blocks pipeline.
Brief description of the drawings
Fig. 1 is the apparatus structure sketch of the ammonia washing of the present invention.
Fig. 2 is the process chart of the ammonia washing of the present invention.
Reference：1- ammonia washes acid storage tank, 2- neutralizing tanks, and 3- ammonia washes sour circulating slot, 4- tail gas absorptions mechanism, 401- Wens Pipe, 402- gas-liquid separation towers.
Embodiment
With reference to specific embodiment, technical scheme is specifically illustrated.
Reference picture 1, ammonia wash mill of the invention, including neutralizing tank 2, tail gas absorption mechanism 4, ammonia wash sour circulating slot 3 Acid storage tank 1 is washed with ammonia, neutralizing tank 2 is the critical piece for completing ammonia washing, and neutralizing tank 2, ammonia wash sour circulating slot 3 and ammonia and washes sour storage By the way of being sequentially connected, ammonia is washed in acid storage tank 1 to store or provide to be needed to use sour tank 1 in whole ammonia washing process Liquid, in the present embodiment the neutralization washing of ammonia and ammonia absorption process using the phosphoric acid that mass concentration is 85%, because It is phosphoric acid that mass concentration is 85% that this ammonia, which washes in acid storage tank 1 store, and clean result than using phosphoric acid,diluted in the prior art Effect is well a lot.Of course, it is possible to the acid solution of ammonia can be absorbed or wash by storing other.
It acid storage tank 1 is washed by ammonia constantly can be washed to ammonia in sour circulating slot 3 and supplement eo-acid so that ammonia washes pH in sour circulating slot 3 Value is maintained at less than 2.0.Ammonia is washed in sour circulating slot 3 and is provided with liquid level automatic valve, can wash acid when liquid level declines to ammonia and follow Eo-acid is supplemented in annular groove 3, keeps its liquid level and pH value.
In neutralizing tank 2, by ammonia wash sour circulating slot 3 provided into neutralizing tank 2 neutralization reaction neutralization acid, with being passed through Liquefied ammonia in neutralizing tank 2 carries out neutralization reaction, completes the key reaction process to ammonia washing.
Neutralizing tank 2 is connected with tail gas absorption mechanism 4, and the ammonia that unreacted is complete in neutralizing tank 2 is absorbed in tail gas absorption mechanism 4 Gas, tail gas absorption mechanism 4 wash sour circulating slot 3 with ammonia and are connected, and the ammonia washed by ammonia required for sour circulating slot 3 provides ammonia absorption is washed Acid, the end of tail gas absorption mechanism 4 take back ammonia and wash sour circulating slot 3, so that the liquid portion after ammonia is absorbed is back to ammonia and washed In sour circulating slot 3, an ammonia recycle absorption system is formed.
In neutralizing tank 2, the complete liquefied ammonia of unreacted, then gasification is flowed into tail together followed by the tail gas of neutralization reaction In aspiration mechanism 4, the ammonia for washing the sour offer of circulating slot 3 with ammonia in tail gas absorption mechanism 4 washes acid formation neutralization reaction, absorbs surplus Remaining ammonia.
In the present embodiment, further restriction has been done by tail gas absorption mechanism 4, and the tail gas absorption mechanism 4 is using text The Venturi tube 401 that the mode that family name's pipe 401 and gas-liquid separation tower 402 combine, neutralizing tank 2 and ammonia are washed sour circulating slot 3 while connected Arrival end, it is in vaporific that ammonia can be washed to acid conversion by Venturi tube 401, and vaporific ammonia washes acid can be more preferable with the ammonia in tail gas Formation neutralization reaction, ammonia assimilation effect is more preferably.Reacted gas-liquid mixture then carries out gas-liquid by gas-liquid separation tower 402 Separation, liquid portion therein is separated, ammonia is back to and washes in sour circulating slot 3, realizes that ammonia washes the effect that acid recycles.
The present invention washes sour circulating slot 3 by ammonia, individually neutralizes washing system by two and ammonia is washed absorption system and carried out Combine well, form an ammonia washing system that can continue for acid, acid.
Reference picture 2, the method for ammonia of the invention washing, washes in acid storage tank 1 ammonia stored by ammonia and washes acid, constantly to ammonia Wash sour circulating slot 3 new ammonia is provided and wash acid, washing sour circulating slot 3 by ammonia provides to neutralizing tank 2 that to neutralize washing sour, in neutralizing tank By neutralization reaction in 2, the liquefied ammonia in neutralizing tank 2 is washed, completes to neutralize the process of washing.Washing is neutralized to have reacted Liquefied ammonia then gasify after be flowed into neutralization reaction tail gas in tail gas absorption mechanism 4, while sour circulating slot 3 is washed to tail gas by ammonia Absorbing mechanism 4 provides ammonia washing acid, and remaining ammonia is absorbed in tail gas absorption mechanism 4, is absorbed in tail gas absorption mechanism 4 Liquid afterwards is back to ammonia and washed in circulating slot again, recycles.
In the procedure of whole ammonia washing, it mainly have passed through neutralization washing and ammonia absorb two processes, in The main conversion to liquefied ammonia is realized with washing, then the absorption completed to remaining ammonia, good absorbing effect are absorbed by ammonia. Ammonia is washed in sour circulating slot 3 and constantly fills into eo-acid, then ammonia can be kept to wash absorption and maintain relatively low scope with the pH value moment of acid, Ensure that ammonia washes absorption and has more preferable ammonia assimilation effect.
The present invention provides the detailed process that ammonia washes absorption, mainly by the way that 2 reacted tail gas of neutralizing tank is passed into text In family name's pipe 401, wash the ammonia that sour circulating slot 3 provides with ammonia and wash acid and be converted into Venturi tube 401 vaporific, formed to neutralize and absorbed, had Effect absorbs remaining ammonia in tail gas, the gas-liquid mixture after the completion of being reacted in Venturi tube 401, then by being connected to Venturi tube 401 The gas-liquid separation tower 402 of end carries out gas-liquid separation, and gas part is transferred to other processes, and liquid portion, which is then back to ammonia, to be washed acid and follow In annular groove 3, recycled.
Ammonia, which is washed, can also produce a small amount of crystalline solid in absorption process, strength of fluid after ammonia is washed during this improves constantly The crystalline solid then formed then can be more and more, cause the blocking of conveyance conduit, washed by using the neutralization washing of the present invention with ammonia After absorbing the mode being combined, the liquid portion in tail gas absorption mechanism 4 and after absorbing reaction then returns to ammonia and washes sour circulating slot 3 In, the liquid after ammonia is washed can be constantly consumed by neutralizing washing, liquid in ammonia due to washing sour circulation caused by ammonia absorption It is consumed in groove 3 as the raw material for neutralizing washing, such concentration would not be too high, and caused crystalline solid is fewer, so as to keep away The problem of crystalline solid blocks pipeline is exempted from.

Claims (5)

  1. A kind of 1. device of ammonia washing, it is characterised in that including
    Neutralizing tank (2), washed for ammonia；
    Tail gas absorption mechanism (4), absorbed for ammonia in the tail gas to neutralizing tank (2)；
    Ammonia washes sour circulating slot (3), for into neutralizing tank (2), tail gas absorption mechanism (4), the washing of supply ammonia or ammonia to be inhaled respectively Receipts acid；And for receiving the phegma after tail gas absorption mechanism (4) absorbs ammonia；
    Ammonia washes acid storage tank (1), and acid is washed for supply ammonia in washing sour circulating slot (3) to ammonia.
  2. 2. device according to claim 1, it is characterised in that
    Described tail gas absorption mechanism (4) includes Venturi tube (401) and gas-liquid separation tower (402),
    The arrival end of the Venturi tube (401) connects neutralizing tank (2) respectively and ammonia washes sour circulating slot (3), for neutralizing tank (2) Reaction end gas in ammonia absorbed；
    Described gas-liquid separation tower (402) is connected with the end of Venturi tube (401), for the phegma after separation of ammonia aspiration； Gas-liquid separation tower (402) is washed circulating slot with ammonia and is connected, and sour circulating slot (3) is washed for phegma to be back into ammonia.
  3. A kind of 3. method of ammonia washing, it is characterised in that comprise the following steps：
    Ammonia, which washes sour circulating slot (3) ammonia is washed into acid, to be passed through in neutralizing tank (2), and liquefied ammonia is washed using neutralization reaction principle；In Tail gas absorption mechanism (4) is passed into the tail gas of neutralization reaction in tank (2), the ammonia that sour circulating slot (3) supply is washed using ammonia washes acid Ammonia in tail gas is absorbed, the liquid portion after absorption is back to ammonia and washed in sour circulating slot (3), ammonia wash acid storage tank (1) to Ammonia washes supplement eo-acid in sour circulating slot (3).
  4. 4. according to the method for claim 3, it is characterised in that
    Wherein, described tail gas absorption mechanism (4) includes Venturi tube (401) and gas-liquid separation tower (402)；
    Tail gas after neutralizing tank (2) neutralization reaction is passed into Venturi tube (401) in tail gas absorption mechanism (4), in Venturi tube (401) In middle tail gas ammonia by ammonia wash sour circulating slot (3) supply ammonia wash sour absorption, gas-liquid mixture passes through gas-liquid separation after absorption Tower (402) separates, and the liquid portion after separation is back to ammonia and washed in sour circulating slot (3).
  5. 5. the method according to claim 3 or 4, it is characterised in that
    What ammonia washed acid storage tank (1) storage is the phosphoric acid that mass concentration is 85%.
CN201711138697.9A 2017-11-16 2017-11-16 A kind of device and method of ammonia washing Pending CN107875812A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711138697.9A CN107875812A (en) 2017-11-16 2017-11-16 A kind of device and method of ammonia washing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711138697.9A CN107875812A (en) 2017-11-16 2017-11-16 A kind of device and method of ammonia washing

Publications (1)

Publication Number Publication Date
CN107875812A true CN107875812A (en) 2018-04-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711138697.9A Pending CN107875812A (en) 2017-11-16 2017-11-16 A kind of device and method of ammonia washing

Country Status (1)

Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2357811Y (en) * 1998-08-28 2000-01-12 肥城市磷铵厂 Monoammonium phosphate tail gas treatment device
CN102068880B (en) * 2010-12-03 2012-11-21 厦门国麟科技有限公司 Method for recycling ammonia gas in industrial waste gas
CN102886196A (en) * 2012-09-20 2013-01-23 山东聊城鲁西化工第五化肥有限公司 Treatment method and treatment system for ammoniated pelleting compound fertilizer tail gas
CN106984163A (en) * 2017-04-13 2017-07-28 广州市广环环保科技有限公司 A kind of ammonia processing unit and ammonia denitrogenation method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2357811Y (en) * 1998-08-28 2000-01-12 肥城市磷铵厂 Monoammonium phosphate tail gas treatment device
CN102068880B (en) * 2010-12-03 2012-11-21 厦门国麟科技有限公司 Method for recycling ammonia gas in industrial waste gas
CN102886196A (en) * 2012-09-20 2013-01-23 山东聊城鲁西化工第五化肥有限公司 Treatment method and treatment system for ammoniated pelleting compound fertilizer tail gas
CN106984163A (en) * 2017-04-13 2017-07-28 广州市广环环保科技有限公司 A kind of ammonia processing unit and ammonia denitrogenation method

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Application publication date: 20180406