CN202785720U - Waste liquid treatment device in process of production of synthesis ammonia and urea - Google Patents
Waste liquid treatment device in process of production of synthesis ammonia and urea Download PDFInfo
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- CN202785720U CN202785720U CN 201220374584 CN201220374584U CN202785720U CN 202785720 U CN202785720 U CN 202785720U CN 201220374584 CN201220374584 CN 201220374584 CN 201220374584 U CN201220374584 U CN 201220374584U CN 202785720 U CN202785720 U CN 202785720U
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Abstract
The utility model provides a waste liquid treatment device in the process of the production of synthesis ammonia and urea. The waste liquid treatment device comprises a desorption tower, a desorbing heat exchanger and a reflux condenser, wherein a desorbed liquid outlet of the desorption tower is connected with a liquid inlet of the desorption tower by a hydrolysis heat exchanger through a pipeline, an air inlet of the desorption tower is connected with an air outlet of the desorption tower through the pipeline, a liquid inlet arranged at the lower part of the desorption tower is connected with a liquid outlet arranged at the lower part of the desorption tower, the liquid outlet arranged at the lower part of the desorption tower is communicated with a boiler, a liquid outlet of the reflux condenser is connected with an absorption liquid inlet of the desorption tower and a two-circulating-one cooler, and an air outlet of the reflux condenser is connected with a tail gas absorption tower by a pipeline. The waste liquid treatment device has the advantages that the waste liquid treatment device is simple in technology, the hydrolysis and the desorption can be carried out in a classification way, the steam with different pressure levels is adopted, the use level of medium-pressure steam can be reduced, the low-pressure steam adopts the steam within a battery limit of a urea device, the comprehensive use ratio of the steam can be improved, the waste liquid treatment device is large in operating flexibility, the operation indexes are easy to control, and the device is stable and reliable in running, and low in production cost.
Description
Technical field
The utility model relates to a kind of for the synthesis of the liquid waste treating apparatus in ammonia, the urea production.
Background technology
Along with the development of economy, living standards of the people improve constantly, and country more and more payes attention to environment protection; require also more and more higher; therefore enterprise need to solve environmental issue when expanding the scale of production, with it as an important investment contents, make to pollute to be reduced to minimum level.Select the liquid waste disposal scheme, ammonia, the urea content after not only requiring to process in the discharging is low but also require low, the less investment of energy consumption, and the treatment process that what is more important adopts should not impact the normal production of original production device.
The standard that waste liquid discharges after treatment in the synthetic ammonia of China, the urea production process design is; its raffinate contains about 0.07% (weight) of ammonia, contains urea about 1.1; because the throughput of most production equipments substantially exceeds original design value; and waste liquor treatment equipment does not have to transform substantially; so; up to the present; almost also there is not an enterprise to reach this standard; this is not only totally unfavorable to environment protection; and increased product consumption; improved product cost, so also need to take rational process unit, the waste liquid that produces in producing has been processed.
Summary of the invention
Technical problem to be solved in the utility model be provide for above-mentioned prior art present situation that a kind of technique is simple, production cost is low and liquid waste disposal is effective for the synthesis of the liquid waste treating apparatus in ammonia, the urea production.
The utility model solves the problems of the technologies described above the technical scheme that adopts: this is for the synthesis of ammonia, liquid waste treating apparatus in the urea production, include desorption tower, the hydrolysis interchanger, the desorb interchanger, reflux exchanger, it is characterized in that: the waste liquid import on described desorption tower top is connected with the waste liquid transfer lime through the desorb interchanger by pipeline, the pneumatic outlet at described desorption tower top is connected with the reflux exchanger import by pipeline, and the liquid exit of described desorption tower top after desorb is connected with the liquid-inlet of hydrolysis tower through the hydrolysis interchanger by pipeline, the gas feed of described desorption tower is connected with the pneumatic outlet of hydrolysis tower by pipeline, the liquid-inlet of described desorption tower bottom is connected with the liquid exit after hydrolysis of hydrolysis tower bottom by pipeline, the desorption tower bottom is connected with boiler by the heat exchanging pipe of pipeline in the desorb interchanger through the liquid exit after the desorb, the desorption tower bottom is connected with vapour pipe by pipeline, and the inner chamber of desorption tower bottom and desorption tower top intracavity inter-connection, the bottom of described hydrolysis tower is connected with vapour pipe by pipeline, the liquid exit one tunnel of described reflux exchanger is connected with the import of desorption tower absorption liquid, and another road and two follows a cooler and is connected, and the pneumatic outlet of reflux exchanger (3) is connected with tail gas absorber by pipeline.
As improvement, the concrete structure of the inner chamber of described desorption tower bottom and desorption tower top intracavity inter-connection may be selected to be: described desorption tower lower lumen extend into by pipeline in the inner chamber on desorption tower top and with the intracavity inter-connection on desorption tower top.
As improvement, described reflux exchanger inside can be equipped with prolong, and described prolong is connected with the pond through cooling-water pump by pipeline.
Improve again, also can be provided with the desorb feeding pump of being convenient to carry waste liquid on the described sewer pipe.
Improve, described hydrolysis tower can be preferably vertical structure again.
Improve again, can be provided with filler and sparger in the described desorption tower.
Improve, the liquid exit of described reflux exchanger is connected with the import of desorption tower absorption liquid by reflux pump one tunnel again, and another road and two is followed a cooler and is connected.
Improve, the liquid exit of described desorption tower top after desorb, is connected with the liquid-inlet of hydrolysis tower through the hydrolysis interchanger through the hydrolysis feeding pump by pipeline again again.
Compared with prior art, the utility model has the advantage of: technique is simple, hydrolysis is carried out with the desorb classification, adopts the steam of different pressures grade, presses the steam consumption in the minimizing, low-pressure steam adopts urea plant within battery limit steam, improve the steam comprehensive utilization ratio, turndown ratio is large, and operation index is easy to control, the device stable and reliable operation, production cost is lower.
Description of drawings
Fig. 1 is the process flow diagram of the utility model embodiment.
Embodiment
Embodiment is described in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, present embodiment for the synthesis of the liquid waste treating apparatus in ammonia, the urea production, include desorption tower 2, hydrolysis interchanger 5, desorb interchanger 4, reflux exchanger 3, be provided with filler and sparger in the described desorption tower 2.Waste liquid import 21 on desorption tower 2 tops is connected with the waste liquid transfer lime through desorb interchanger 4 by pipeline, is provided with the desorb feeding pump 42 of being convenient to carry waste liquid on the described sewer pipe.The pneumatic outlet 27 at described desorption tower 2 tops is connected with reflux exchanger import 31 by pipeline, and the liquid exit 22 of described desorption tower 2 tops after desorb is connected with the liquid-inlet 14 of hydrolysis tower 1 through hydrolysis interchanger 5 by pipeline, the gas feed 26 of described desorption tower 2 is connected with the pneumatic outlet 11 of hydrolysis tower 1 by pipeline, the liquid-inlet 25 of described desorption tower 2 bottoms is connected with the liquid exit 12 after hydrolysis of hydrolysis tower 1 bottom by pipeline, the hydrolysis tower 1 of present embodiment is vertical structure, can certainly be horizontal type structure, specifically can decide by design.Desorption tower 2 bottoms are connected with boiler 41 by the heat exchanging pipe of pipeline in desorb interchanger 4 through the liquid exit 23 after the desorb, desorption tower 2 bottoms are connected with vapour pipe L by pipeline, and the inner chamber of desorption tower 2 bottoms and desorption tower 2 top intracavity inter-connections, described desorption tower 2 lower lumen extend into by pipeline in the inner chamber on desorption tower 2 tops and with the intracavity inter-connection on desorption tower 2 tops.The bottom of described hydrolysis tower 1 is connected with vapour pipe by pipeline M, the liquid exit 32 one tunnel of described reflux exchanger 3 is connected with desorption tower absorption liquid import 20, and another road and two follows a cooler 34 and is connected, and the pneumatic outlet 35 of reflux exchanger 3 is connected with tail gas absorber 36 by pipeline.Described reflux exchanger 3 inside are equipped with prolong 37, described prolong 37 by pipeline be connected with the pond through cooling-water pump 38.
The liquid exit 32 of above-mentioned reflux exchanger 3 is connected with desorption tower absorption liquid import 20 by reflux pump 33 one tunnel, and another road and two is followed a cooler 34 and is connected.And the liquid exit 22 of above-mentioned desorption tower 2 tops after desorb is connected with the liquid-inlet 14 of hydrolysis tower 1 through hydrolysis interchanger 5 through hydrolysis feeding pump 51 by pipeline again, thereby makes feeding more convenient.
Claims (8)
1. one kind for the synthesis of ammonia, liquid waste treating apparatus in the urea production, include desorption tower (2), hydrolysis interchanger (5), desorb interchanger (4), reflux exchanger (3), it is characterized in that: the waste liquid import (21) on described desorption tower (2) top is connected with the waste liquid transfer lime through desorb interchanger (4) by pipeline, the pneumatic outlet (27) at described desorption tower (2) top is connected with reflux exchanger import (31) by pipeline, and the liquid exit (22) of described desorption tower (2) top after desorb is connected with the liquid-inlet (14) of hydrolysis tower (1) through hydrolysis interchanger (5) by pipeline, the gas feed (26) of described desorption tower (2) is connected with the pneumatic outlet (11) of hydrolysis tower (1) by pipeline, the liquid-inlet (25) of described desorption tower (2) bottom is connected with the liquid exit (12) after hydrolysis of hydrolysis tower (1) bottom by pipeline, desorption tower (2) bottom is connected with boiler (41) by the heat exchanging pipe of pipeline in desorb interchanger (4) through the liquid exit after the desorb (23), desorption tower (2) bottom is connected with vapour pipe (L) by pipeline, and the inner chamber of desorption tower (2) bottom and desorption tower (2) top intracavity inter-connection, the bottom of described hydrolysis tower (1) is connected with vapour pipe by pipeline (M), the liquid exit (32) one tunnel of described reflux exchanger (3) is connected with desorption tower absorption liquid import (20), and another road and two follows a cooler (34) and is connected, and the pneumatic outlet (35) of reflux exchanger (3) is connected with tail gas absorber (36) by pipeline.
2. liquid waste treating apparatus according to claim 1, it is characterized in that: the concrete structure of the inner chamber of described desorption tower (2) bottom and desorption tower (2) top intracavity inter-connection is: described desorption tower (2) lower lumen extend into by pipeline in the inner chamber on desorption tower (2) top and with the intracavity inter-connection on desorption tower (2) top.
3. liquid waste treating apparatus according to claim 2, it is characterized in that: described reflux exchanger (3) inside is equipped with prolong (37), and described prolong (37) is connected with the pond through cooling-water pump (38) by pipeline.
4. arbitrary described liquid waste treating apparatus in 3 according to claim 1 is characterized in that: be provided with the desorb feeding pump (42) of being convenient to carry waste liquid on the described sewer pipe.
5. arbitrary described liquid waste treating apparatus in 3 according to claim 1, it is characterized in that: described hydrolysis tower (1) is vertical structure.
6. arbitrary described liquid waste treating apparatus in 3 according to claim 1, it is characterized in that: described desorption tower is provided with filler and sparger in (2).
7. arbitrary described liquid waste treating apparatus in 3 according to claim 1, it is characterized in that: the liquid exit (32) of described reflux exchanger (3) is connected with desorption tower absorption liquid import (20) by reflux pump (33) a tunnel, and another road and two is followed a cooler (34) and is connected.
8. arbitrary described liquid waste treating apparatus in 3 according to claim 1, it is characterized in that: the liquid exit (22) of described desorption tower (2) top after desorb, is connected with the liquid-inlet (14) of hydrolysis tower (1) through hydrolysis interchanger (5) through hydrolysis feeding pump (51) by pipeline again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220374584 CN202785720U (en) | 2012-07-31 | 2012-07-31 | Waste liquid treatment device in process of production of synthesis ammonia and urea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220374584 CN202785720U (en) | 2012-07-31 | 2012-07-31 | Waste liquid treatment device in process of production of synthesis ammonia and urea |
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| Publication Number | Publication Date |
|---|---|
| CN202785720U true CN202785720U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220374584 Expired - Fee Related CN202785720U (en) | 2012-07-31 | 2012-07-31 | Waste liquid treatment device in process of production of synthesis ammonia and urea |
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| CN (1) | CN202785720U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060313A (en) * | 2015-07-17 | 2015-11-18 | 中国华能集团公司 | Ammonia producing system adopting urea solution hydrolysis |
-
2012
- 2012-07-31 CN CN 201220374584 patent/CN202785720U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105060313A (en) * | 2015-07-17 | 2015-11-18 | 中国华能集团公司 | Ammonia producing system adopting urea solution hydrolysis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: NINGBO JINYUANDONG PETROCHEMICAL ENGINEERING TECHN Free format text: FORMER NAME: NINGBO YUANDONG INDUSTRY TECHNOLOGY CO., LTD. |
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| CP03 | Change of name, title or address |
Address after: 8, building 435, building E, creative Plaza, 315040 Jiangdong North Road, Ningbo, Zhejiang Patentee after: Ningbo Jinyuandong Petrochemical Engineering Technology Co., Ltd. Address before: 315040 Zhejiang Province, Ningbo City Jiangdong Road No. 435 Ningbo Hefeng creative square building 8 floor E Patentee before: Ningbo Yuandong Industry Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 315040, Zhejiang, Ningbo province Jiangdong North Road, No. 004, 435 (8-1) and creative Plaza creative court building 801 units Patentee after: Ningbo Zhongke Far East catalytic Engineering Technology Co Ltd Address before: 8, building 435, building E, creative Plaza, 315040 Jiangdong North Road, Ningbo, Zhejiang Patentee before: Ningbo Jinyuandong Petrochemical Engineering Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20190731 |