CN105645436A - Novel system for recycling ammonia from waste gas produced by benzene and cyanogen device - Google Patents
Novel system for recycling ammonia from waste gas produced by benzene and cyanogen device Download PDFInfo
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- CN105645436A CN105645436A CN201610161686.1A CN201610161686A CN105645436A CN 105645436 A CN105645436 A CN 105645436A CN 201610161686 A CN201610161686 A CN 201610161686A CN 105645436 A CN105645436 A CN 105645436A
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- tower
- ammonia
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- waste gas
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C1/00—Ammonia; Compounds thereof
- C01C1/02—Preparation, purification or separation of ammonia
- C01C1/12—Separation of ammonia from gases and vapours
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Analytical Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention relates to a novel system for recycling ammonia from waste gas produced by a benzene and cyanogen device. The novel system comprises an absorption column I, an absorption column II, a lean solution tank, a desorption column and an ammonia recovery column, wherein ammonium phosphate is added into the lean solution tank to form an absorption solution; the absorption solution is sequentially pumped into the absorption column I and the absorption column II to be absorbed, and is then pumped into the desorption column to be desorbed, and finally is pumped into the ammonia recovery column to be recycled. The novel system has the advantages that the problem of treatment of waste gas containing high-concentration ammonia in the existing benzene and cyanogen device is solved, the recycled ammonia can be cyclically used for the benzene and cyanogen production devices, and the absorption solution, namely monoammonium phosphate, is returned back to the lean solution tank to cyclically use; by cyclically using the materials, the consumption of technology and materials is decreased, the environment-protection effect is realized, the consumption of energy sources is decreased, and the project cost of whole device is reduced.
Description
Technical field
The present invention relates to ammoniacal liquor reclaimer technical field, be specifically related to a kind of containing the system reclaiming ammonia in ammonia mother solution.
Background technology
Produce the waste gas produced in the device of benzene cyanogen series products at present to mainly contain: the congener etc. of substantial amounts of ammonia, carbon dioxide, nitrogen and micro-benzene or benzene. Owing in waste gas, ammonia level is relatively big, waste gas does not deal with and does not allow discharge to air, and the waste gas not processed can cause the significant wastage of raw material. The traditional treatment method of this kind of waste gas utilizes the ammonia, carbon dioxide and micro-benzene or the benzene etc. that absorb in liquid absorption waste gas, and traditional absorption liquid is mainly selected: water, sulfuric acid solution and hydrochloric acid solution etc. Choosing mainly produces problems with when using water as absorption liquid: the existence of carbon dioxide in waste gas reduces the water trap to ammonia, causes water consumption relatively big, produces not accessible waste liquid amount more. Select sulfuric acid solution, hydrochloric acid solution as when absorbing liquid, the saline solution containing benzene or the congener of benzene generated after absorption cannot be sold, can not recycle, and acidity absorbs the liquid material to the equipment of absorption, pipeline and pipe fitting and requires higher, especially the price of equipment selected by the acid solution of chloride ion-containing, pipeline and pipe fitting is costly, causes expense bigger of absorption plant.
Existing equipment technical disadvantages: when 1, selecting water as absorption liquid, the consumption of water is bigger, add whole waste gas recovering device engineering cost, select sulfuric acid solution and hydrochloric acid solution cannot process as the saline solution containing benzene or the congener of benzene produced when absorbing liquid and installation cost is higher; 2, the trap of ammonia of the CO 2 reduction in waste gas, causes waste liquid amount to strengthen, and waste liquid cannot process, and causes rugged environment to pollute and great energy waste; 3, be absorbed in absorption liquid in substantial amounts of ammonia fail to be recycled, add process stream consume.
Summary of the invention
For the deficiency that prior art exists, it is an object of the invention to provide a kind of new system reclaiming ammonia from the waste gas that benzene cyanogen class device produces.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of new system reclaiming ammonia from the waste gas that benzene cyanogen class device produces, described system includes absorbing a tower, absorb two towers, lean liquid bath, Analytic Tower and recovery ammonia tower, add ammonium phosphate in described lean liquid bath and form absorption liquid, absorb liquid pump into absorption two towers successively and absorb a tower, described absorption two tower and absorption one tower pump into Analytic Tower after absorbing and resolve, pump into recovery ammonia tower after parsing to reclaim, described Analytic Tower relies on Analytic Tower vaporizer to control temperature, cooled down by Analytic Tower cooler, described recovery ammonia tower passes through recovery ammonia tower heat exchanger temperature control, cooled down by recovery ammonia tower cooler device.
Described Analytic Tower charging is preheated by Analytic Tower feed preheater.
Described absorption two tower and absorbing connects between a tower and absorbs a tower reflux pump, absorbs a tower reactor liquid pump and carry out material exchange.
Described absorption one tower is connected to absorption one tower reflux cooler.
Described Analytic Tower vaporizer carries out heat exchange by Analytic Tower heat exchanger.
Beneficial effects of the present invention: 1, solve an exhaust-gas treatment difficult problem for the high concentration ammonia that current benzene cyanogen class device produces. 2, the ammonia reclaimed is circularly used for the process units of benzene cyanogen class, absorbs liquid-MAP and returns the recycling of lean liquid bath, and Matter Transfer uses the consumption reducing process stream. 3, produce the waste water of the biochemical treatment delivered to of trace, poisonous and harmful waste liquid can not be processed and produce. 4, the recycling of process stream decreases waste discharge, protects environment, reduces energy resource consumption, saves the engineering cost of whole device.
Accompanying drawing explanation
Fig. 1 is present configuration schematic diagram.
In figure: 1-absorbs a tower, 2-absorbs two towers, 3-Analytic Tower, 4-recovery ammonia tower, 5-Analytic Tower vaporizer, 6-resolves liquid bath, 7-Analytic Tower cooler, 8-recovery ammonia tower cooler device, 9-absorbs a tower reflux cooler, the lean liquid bath of 10-, 11-Analytic Tower heat exchanger, 12-recovery ammonia tower heat exchanger, 13-absorbs a tower reflux pump, 14-absorbs a tower reactor liquid pump, 15-Analytic Tower feed preheater.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
As shown in Figure 1, a kind of new system reclaiming ammonia from the waste gas that benzene cyanogen class device produces, described system includes absorbing a tower 1, absorb two towers 2, lean liquid bath 10, Analytic Tower 3 and recovery ammonia tower 4, add ammonium phosphate in described lean liquid bath 10 and form absorption liquid, absorb liquid pump into absorption two tower 2 successively and absorb a tower 1, described absorption two tower 2 and absorption one tower 1 pump into Analytic Tower 3 after absorbing and resolve, pump into recovery ammonia tower 4 after parsing to reclaim, described Analytic Tower 3 relies on Analytic Tower vaporizer 5 to control temperature, cooled down by Analytic Tower cooler 7, described recovery ammonia tower 4 is by recovery ammonia tower heat exchanger 12 temperature control, cooled down by recovery ammonia tower cooler device 8, the charging of described Analytic Tower 3 is preheated by Analytic Tower feed preheater 15, connect between described absorption two tower 2 and absorption one tower 1 and absorb a tower reflux pump 13, absorb a tower reactor liquid pump 14 and carry out material exchange, described absorption one tower 1 is connected to absorption one tower reflux cooler 9, described Analytic Tower vaporizer 5 carries out heat exchange by Analytic Tower heat exchanger 11.
Operation principle: during work, first configuration absorbs liquid: having added ammonium phosphate in lean liquid bath 10, sample analysis raw material phosphor acid amide concentration reaches 30%-35%;
Open the terminal valve absorbing two tower lean pumps, to absorbing two tower 2 feedings, when absorb two tower 2 tower liquid levels be shown to liquidometer 60% time, open the valve before and after absorption two tower reactor liquid pumps and pump, to absorbing tower 1 charging, control to absorb two tower 2 still liquid liquid levels at the 80% of liquidometer simultaneously, when absorb a tower 1 tower liquid level be shown to liquidometer 30% time, open the valve before and after absorption one tower reflux pump 13 and pump, absorb a tower reflux pump 13 properly functioning, when absorb a tower 1 tower liquid level be shown to liquidometer 80% time, open the valve before and after absorption one tower reactor liquid pump 14 and pump, to desorber 3 feeding, desorber 3 material conveying liquid measure is by absorbing a tower Liquid level (absorb the level stability of a tower 80%), when the liquid level of desorber vaporizer 5 buries heat exchanger tube, desorber vaporizer 5 leads to steam heating, control the temperature 165 DEG C of desorber vaporizer 5,Desorber 3 adds the operation Stress control 0.55MPa of vapours, desorber 3 normal operating, Liquid level desorbing base of evaporator discharging, and discharging returns lean liquid bath 10 after heat exchanger;
When absorbing a tower 1, two towers 2 and Analytic Tower 3 stable after, waste gas enters absorption one, two towers, react with absorbing MAP in liquid at the ammonia absorbed in a tower in waste gas, liquid temp in tower is made to increase, pH value also rises, open absorption one tower reflux cooler 9, logical cooling water, by strengthening capacity of returns, the rising of temperature of liquid in control tower, ammonia and the MAP absorbed in liquid react generation Diammonium phosphate (DAP), the pH value of tower liquid is risen to about 6.5 by the 4.5 of initial start-up, the pH value 6.5 of control tower liquid, the effect of desorber 3 is that Diammonium phosphate (DAP) decomposes ammonification and MAP, and ammonia is steamed recovery ammonia tower 4 reclaim, MAP returns to lean liquid bath reuse,
Check instrument and the valve of recovery ammonia tower 4 system: open the cooling water outlet and inlet valve of recovery ammonia tower top cooler 8, logical cooling water. regulate recovery ammonia tower 4 temperature and pressure, open the steam inlet valve of recovery ammonia tower, begin to warm up liquid in tower, when after material boiling in tower, material steam rises along tower body, filler is hung liquid gradually, in tower, liquid level declines, open desorbing liquid pump, recovery ammonia tower is entered after material is preheated, maintain tower reactor liquid level at the 50% of still liquidometer, after material steam arrives tower top, tower top temperature displays temperature rapidly rises to 122 DEG C, the a part of backflow that is condensed in recovery ammonia tower top cooler of material, the uncooled ammonia gas of another part passes through overhead extraction, control temperature��40 DEG C of vapor-phase material, the operation pressure 0.5MPa of control tower, water sample in sample analysis tower, when tower reactor material meets the concentration of biochemical treatment waste water requirement, tower reactor starts discharging.
Above content is only to present configuration example and explanation; described specific embodiment is made various amendment or supplements or adopt similar mode to substitute by affiliated those skilled in the art; without departing from invention structure or surmount the scope that present claims book is defined, protection scope of the present invention all should be belonged to.
Claims (5)
1. the new system reclaiming ammonia from the waste gas that benzene cyanogen class device produces, described system includes absorbing a tower (1), absorb two towers (2), lean liquid bath (10), Analytic Tower (3) and recovery ammonia tower (4), it is characterized in that, add ammonium phosphate in described lean liquid bath (10) and form absorption liquid, absorb liquid pump into absorption two towers (2) successively and absorb a tower (1), described absorption two tower (2) and absorption one tower (1) pump into Analytic Tower (3) after absorbing and resolve, pump into recovery ammonia tower (4) after parsing to reclaim, described Analytic Tower (3) relies on Analytic Tower vaporizer (5) to control temperature, cooled down by Analytic Tower cooler (7), described recovery ammonia tower (4) is by recovery ammonia tower heat exchanger (12) temperature control, cooled down by recovery ammonia tower cooler device (8).
2. a kind of according to claim 1 from the waste gas that benzene cyanogen class device produces, reclaim the new system of ammonia, it is characterised in that described Analytic Tower (3) charging is by Analytic Tower feed preheater (15) preheating.
3. a kind of according to claim 1 from the waste gas that benzene cyanogen class device produces, reclaim the new system of ammonia, it is characterized in that, described absorption two tower (2) and absorbing connects between a tower (1) and absorbs a tower reflux pump (13), absorbs a tower reactor liquid pump (14) and carry out material exchange.
4. a kind of according to claim 1 from the waste gas that benzene cyanogen class device produces, reclaim the new system of ammonia, it is characterised in that described absorption one tower (1) is connected to absorption one tower reflux cooler (9).
5. a kind of according to claim 1 from the waste gas that benzene cyanogen class device produces, reclaim the new system of ammonia, it is characterised in that described Analytic Tower vaporizer (5) carries out heat exchange by Analytic Tower heat exchanger (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610161686.1A CN105645436B (en) | 2016-03-18 | 2016-03-18 | A kind of system that ammonia is reclaimed in the waste gas produced from benzene cyanogen class device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610161686.1A CN105645436B (en) | 2016-03-18 | 2016-03-18 | A kind of system that ammonia is reclaimed in the waste gas produced from benzene cyanogen class device |
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| CN105645436A true CN105645436A (en) | 2016-06-08 |
| CN105645436B CN105645436B (en) | 2017-10-17 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108926962A (en) * | 2018-08-10 | 2018-12-04 | 重庆天原化工有限公司 | Ammonia-containing exhaust recovery and treatment method |
| CN110280104A (en) * | 2019-06-24 | 2019-09-27 | 天华化工机械及自动化研究设计院有限公司 | A kind of phosphorus ammonium method processing catalyst ammonia-contaminated gas and ammonia reclaiming process |
Citations (4)
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| CN101664627A (en) * | 2009-09-23 | 2010-03-10 | 赢创三征（营口）精细化工有限公司 | Method and equipment for purifying tail gas generated in producing sodium cyanide by cracking light oil |
| CN202962226U (en) * | 2012-11-28 | 2013-06-05 | 河南骏化发展股份有限公司 | Melamine tail gas recycling system |
| CN104355343A (en) * | 2014-11-04 | 2015-02-18 | 赛鼎工程有限公司 | Purification technology for ammonia recycled from wastewater from coal gasification |
| CN205442663U (en) * | 2016-03-18 | 2016-08-10 | 安徽省化工设计院 | Follow new system that retrieves ammonia in waste gas of benzene cyanogen class device production |
-
2016
- 2016-03-18 CN CN201610161686.1A patent/CN105645436B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101664627A (en) * | 2009-09-23 | 2010-03-10 | 赢创三征（营口）精细化工有限公司 | Method and equipment for purifying tail gas generated in producing sodium cyanide by cracking light oil |
| CN202962226U (en) * | 2012-11-28 | 2013-06-05 | 河南骏化发展股份有限公司 | Melamine tail gas recycling system |
| CN104355343A (en) * | 2014-11-04 | 2015-02-18 | 赛鼎工程有限公司 | Purification technology for ammonia recycled from wastewater from coal gasification |
| CN205442663U (en) * | 2016-03-18 | 2016-08-10 | 安徽省化工设计院 | Follow new system that retrieves ammonia in waste gas of benzene cyanogen class device production |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108926962A (en) * | 2018-08-10 | 2018-12-04 | 重庆天原化工有限公司 | Ammonia-containing exhaust recovery and treatment method |
| CN110280104A (en) * | 2019-06-24 | 2019-09-27 | 天华化工机械及自动化研究设计院有限公司 | A kind of phosphorus ammonium method processing catalyst ammonia-contaminated gas and ammonia reclaiming process |
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| CN105645436B (en) | 2017-10-17 |
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