CN201441879U - Melamine tail gas recovery tower - Google Patents
Melamine tail gas recovery tower Download PDFInfo
- Publication number
- CN201441879U CN201441879U CN2009200290475U CN200920029047U CN201441879U CN 201441879 U CN201441879 U CN 201441879U CN 2009200290475 U CN2009200290475 U CN 2009200290475U CN 200920029047 U CN200920029047 U CN 200920029047U CN 201441879 U CN201441879 U CN 201441879U
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- CN
- China
- Prior art keywords
- tail gas
- cavity
- tower body
- condensation chamber
- tower
- 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.)
- Expired - Fee Related
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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
- Y02P20/141—Feedstock
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- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a melamine tail gas recovery tower which comprises a tower body, wherein a condensing cavity is arranged on the lower portion of the tower body, a washing cavity is arranged on the upper portion, the washing cavity is communicated with the condensing cavity, a tail gas inlet and a condensed methanaminium liquid outlet are installed on the outer wall on the lower portion of the condensing cavity, the distance between the condensed methanaminium liquid outlet and the bottom surface of the tower body is smaller than the distance between the tail gas inlet and the bottom surface of the tower body, a heat exchanging pipe is installed in the condensing cavity, a water inlet cavity and a water outlet cavity are arranged on the bottom of the tower body, the water inlet cavity is respectively communicated with a cooling water inlet pipe and a water inlet of the heat exchanging pipe, the water outlet cavity is respectively communicated with a cooling water outlet pipe and the water outlet of the heat exchanging pipe, a circulated methanaminium liquid inlet pipe is installed on the outer wall of the condensing cavity, a filling layer is installed on the lower portion of the washing cavity, a washing liquid spraying pipe is installed on the upper portion of the washing cavity, and an exhaust port is installed on the top portion of the condensing cavity. The melamine tail gas recovery tower has the beneficial effects that two-stage absorption mode is adopted, the absorption efficiency is greatly improved, and the concentration of generated methanaminium liquid is high, and the tower is beneficial for coproducing carbamide.
Description
Technical field
The utility model relates to Melamine Production device field, specifically is a kind of melamine tail gas recovery tower.
Background technology
In the preparation technology of melamine, its tail gas usually is used for coproduction urea to be used.Equipment commonly used when melamine tail gas reclaims is the absorption tower, reclaim when using, weak aqua ammonia descends from tower top spray, tail gas enters the back and carries out reverse absorption with spray liquid at the bottom of tower, form first ammonium liquid, the ammonia in the first ammonium liquid that forms in this absorption tower and the content of carbon dioxide are all very low, have only about 20%, and the water content of this first ammonium liquid is too many, to reduce the conversion ratio of urea synthesizer greatly during coproduction urea, very big to the carbamide production system influence, ammon amount height in the while combustion gas, environmental pollution is serious.
Summary of the invention
The purpose of this utility model is to provide a kind of melamine tail gas recovery tower, it can solve the deficiency that exists in the known technology, by bottom in tower body condensation chamber is set, top is provided with washing cavities, melamine is carried out two-stage to be absorbed, can generate high concentration first ammonium liquid, be beneficial to coproduction urea more and use.
The utility model for achieving the above object, be achieved through the following technical solutions: the melamine tail gas recovery tower, comprise tower body, the tower body bottom is a condensation chamber, top is washing cavities, washing cavities communicates with condensation chamber, tail gas import and the outlet of dense first ammonium liquid are installed on the outer wall of condensation chamber bottom, the outlet of dense first ammonium liquid apart from the distance of tower body bottom surface less than the distance of tail gas import apart from the tower body bottom surface, heat exchanger tube is installed in the condensation chamber, the tower body bottom is provided with intake antrum and water chamber, and intake antrum is communicated with cooling water inlet pipe and heat exchanger tube water inlet respectively, and water chamber is communicated with cooling water outlet pipe and heat exchanger tube delivery port respectively, circulation first ammonium liquid feed tube is installed on the condensation chamber outer wall, packing layer is installed in the bottom in the washing cavities, and the cleaning solution shower is installed on washing cavities top, and exhaust outlet is installed at the condensation chamber top.
Install on the outer wall of described condensation chamber bottom and divide air cavity, divide the tail gas import is installed on the air cavity, offer some air inlets on the outer wall of condensation chamber bottom with on the corresponding position of minute air cavity.
Around the bottom liquid collecting cavity is installed in the described washing cavities, the cleaning solution drain pipe is installed on the outer wall of washing cavities bottom.
Observation window is installed at described tower body middle part.
The beneficial effects of the utility model are: adopt the two-stage absorption pattern, the bottom is provided with condensation chamber in tower body, top is provided with washing cavities, tail gas absorbs with the condensation absorption and the tower body upper wash of process tower body bottom, improved absorption efficiency greatly, the ammonium carbamate concentration height that is generated is beneficial to coproduction urea and uses; The fluid position is in device bottom, and pressure is big, can guarantee Generation Liquid concentration; Combustion gas is few, reduces environmental pollution; Simple for structure reasonable, cost is low etc.
Description of drawings
Accompanying drawing 1 is a main TV structure schematic diagram of the present utility model.
The specific embodiment
The utility model is described in further detail for the contrast accompanying drawing:
Agent structure of the present utility model has tower body 7, and tower body 7 bottoms are condensation chambers 6, and top is washing cavities 10, and washing cavities 10 communicates with condensation chamber 6.Tail gas import 3 and dense first ammonium liquid outlet 17 are installed on the described condensation chamber 6 bottom outer walls, tail gas import 3 communicates with the melamine tail gas discharger, the outlet 17 of dense first ammonium liquid apart from the distance of tower body 7 bottom surfaces less than the distance of tail gas import 3 apart from tower body 7 bottom surfaces, this technical scheme can make dense first ammonium liquid outlet 17 be in equipment pressure maximum, can guarantee the concentration of Generation Liquid.Heat exchanger tube 16 is installed in the condensation chamber 6, and heat exchanger tube 16 mostly is " U " type structure.In tower body 7 bottoms intake antrum 2 and water chamber 18 are set, intake antrum 2 is communicated with cooling water inlet pipe 1 and heat exchanger tube 16 water inlets respectively, water chamber 18 is communicated with cooling water outlet pipe 19 and heat exchanger tube 16 delivery ports respectively, cooling water enters intake antrum 2 by cooling water inlet pipe 1 and carries out heat exchange entering heat exchanger tube 16, flow into water chamber 18 after heat exchange is finished, flow out by cooling water outlet pipe 19 again.Circulation first ammonium liquid feed tube 15 is installed on condensation chamber 6 outer walls, in condensation chamber 6, carry rare first ammonium liquid by circulation first ammonium liquid feed tube 15, rare first ammonium liquid carries out condensation with tail gas and absorbs in condensation chamber 6, rare first ammonium liquid can play stirring action simultaneously, can improve the absorptivity in the condensation chamber 6.Packing layer 9 is installed in the bottom in washing cavities 10, and cleaning solution shower 13 is installed on washing cavities 10 tops, and exhaust outlet 12 is installed at condensation chamber 10 tops.
In order to make tail gas can evenly enter condensation chamber 6, improve absorptivity, on condensation chamber 6 bottom outer walls, install and divide air cavity 4, dividing air cavity 4 is loop configuration, be centered around condensation chamber 6 outer wall outsides, tail gas import 3 is installed on the described minute air cavity 4, offer some air inlets 5 on the condensation chamber 6 bottom outer walls with on minute air cavity 4 corresponding positions, melamine tail gas enters branch air cavity 4 by tail gas import 3, some air inlets 5 on condensation chamber 6 outer walls enter condensation chamber 6 then, and tail gas is by after dividing air cavity 4, and it is more even to distribute, can not cause gas to block, help condensation and absorb.
In the foregoing description,, liquid collecting cavity 20 is installed around the bottom in washing cavities 10 in order to reduce the use amount of cleaning solution, cleaning solution drain pipe 14 is installed on the washing cavities 10 bottom outer walls, cleaning solution after the use falls in the liquid collecting cavity 20, is flowed out by cleaning solution drain pipe 14 then, in order to recycling.
Observation window 8 is installed at tower body 7 middle parts, can be observed degree of absorption in the tower body 7 by observation window 8.11 is mouth sprays among the figure.
When the utility model uses, tail gas mixes the back and carry out the condensation absorption in condensation chamber 6 with rare first ammonium liquid, unabsorbed gases enters washing cavities 10, in washing cavities 10, wash absorption, the a small amount of gas that is not washed absorption is discharged from the exhaust outlet 12 on washing cavities 10 tops, and high concentration first ammonium liquid flows out from dense first ammonium liquid outlet.
Claims (4)
1. melamine tail gas recovery tower, comprise tower body (7), it is characterized in that: tower body (7) bottom is condensation chamber (6), top is washing cavities (10), washing cavities (10) communicates with condensation chamber (6), tail gas import (3) and dense first ammonium liquid outlet (17) are installed on the outer wall of condensation chamber (6) bottom, dense first ammonium liquid outlet (17) apart from the distance of tower body (7) bottom surface less than the distance of tail gas import (3) apart from tower body (7) bottom surface, heat exchanger tube (16) is installed in the condensation chamber (6), tower body (7) bottom is provided with intake antrum (2) and water chamber (18), intake antrum (2) is communicated with cooling water inlet pipe (1) and heat exchanger tube (16) water inlet respectively, water chamber (18) is communicated with cooling water outlet pipe (19) and heat exchanger tube (16) delivery port respectively, circulation first ammonium liquid feed tube (15) is installed on condensation chamber (6) outer wall, packing layer (9) is installed in the interior bottom of washing cavities (10), cleaning solution shower (13) is installed on washing cavities (10) top, and exhaust outlet (12) is installed at condensation chamber (10) top.
2. melamine tail gas recovery tower according to claim 1, it is characterized in that: install on the outer wall of condensation chamber (6) bottom and divide air cavity (4), divide air cavity (4) to go up tail gas import (3) is installed, offer some air inlets (5) on the outer wall of condensation chamber (6) bottom with on the corresponding position of a minute air cavity (4).
3. melamine tail gas recovery tower according to claim 1 is characterized in that: around the interior bottom of washing cavities (10) liquid collecting cavity (20) is installed, cleaning solution drain pipe (14) is installed on the outer wall of washing cavities (10) bottom.
4. according to claim 1,2 or 3 each described melamine tail gas recovery towers, it is characterized in that: observation window (8) is installed at tower body (7) middle part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200290475U CN201441879U (en) | 2009-07-09 | 2009-07-09 | Melamine tail gas recovery tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200290475U CN201441879U (en) | 2009-07-09 | 2009-07-09 | Melamine tail gas recovery tower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201441879U true CN201441879U (en) | 2010-04-28 |
Family
ID=42546554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200290475U Expired - Fee Related CN201441879U (en) | 2009-07-09 | 2009-07-09 | Melamine tail gas recovery tower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201441879U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102805990A (en) * | 2012-06-05 | 2012-12-05 | 四川美丰化工股份有限公司 | System for washing and recycling tail gas generated during production of urea |
| CN103463832A (en) * | 2013-10-09 | 2013-12-25 | 吉首大学 | Tail gas refrigeration recycling processing device |
| CN106167470A (en) * | 2016-07-26 | 2016-11-30 | 湖北宜化集团有限责任公司 | A kind of tripolycyanamide of holding successfully reclaims the system and method for urea plant |
| CN106349117A (en) * | 2016-08-27 | 2017-01-25 | 湖北宜化集团有限责任公司 | Method for treating melamine tail gas |
| CN111085079A (en) * | 2019-12-31 | 2020-05-01 | 安徽六国化工股份有限公司 | Purification system and process for urea emission tail gas |
| CN114772830A (en) * | 2022-04-29 | 2022-07-22 | 逸辰环保科技(厦门)有限公司 | Treatment method and system for ammonia desulphurization waste liquid |
-
2009
- 2009-07-09 CN CN2009200290475U patent/CN201441879U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102805990A (en) * | 2012-06-05 | 2012-12-05 | 四川美丰化工股份有限公司 | System for washing and recycling tail gas generated during production of urea |
| CN102805990B (en) * | 2012-06-05 | 2014-11-12 | 四川美丰化工股份有限公司 | System for washing and recycling tail gas generated during production of urea |
| CN103463832A (en) * | 2013-10-09 | 2013-12-25 | 吉首大学 | Tail gas refrigeration recycling processing device |
| CN106167470A (en) * | 2016-07-26 | 2016-11-30 | 湖北宜化集团有限责任公司 | A kind of tripolycyanamide of holding successfully reclaims the system and method for urea plant |
| CN106349117A (en) * | 2016-08-27 | 2017-01-25 | 湖北宜化集团有限责任公司 | Method for treating melamine tail gas |
| CN111085079A (en) * | 2019-12-31 | 2020-05-01 | 安徽六国化工股份有限公司 | Purification system and process for urea emission tail gas |
| CN111085079B (en) * | 2019-12-31 | 2022-08-16 | 安徽六国化工股份有限公司 | Purification system and process for urea emission tail gas |
| CN114772830A (en) * | 2022-04-29 | 2022-07-22 | 逸辰环保科技(厦门)有限公司 | Treatment method and system for ammonia desulphurization waste liquid |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100428 Termination date: 20120709 |