CN203173820U - Cooling water recirculation system of oxidation absorption tower for nitric acid production device - Google Patents
Cooling water recirculation system of oxidation absorption tower for nitric acid production device Download PDFInfo
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- CN203173820U CN203173820U CN2012207393351U CN201220739335U CN203173820U CN 203173820 U CN203173820 U CN 203173820U CN 2012207393351 U CN2012207393351 U CN 2012207393351U CN 201220739335 U CN201220739335 U CN 201220739335U CN 203173820 U CN203173820 U CN 203173820U
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- nitric acid
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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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Abstract
The utility model relates to a cooling water recirculation system of an oxidation absorption tower for a nitric acid production device. An evaporator shell side chilled water outlet pipe line of a freezing machine group is connected with an air compressor inlet pipe line or a compressed bypass pipe line; the evaporator chilled water outlet pipe line or an evaporator bypass outlet pipe line is connected with tower tray inlet pipe lines on the 38th, 40th and 42nd layers of the oxidation absorption tower; tower tray outlet pipe lines on the 38th, 40th and 42nd layers of the oxidation absorption tower are connected with tower tray inlets on the fourth, fifth and sixth layers of the absorption tower; the tower tray outlets of the fourth, fifth and sixth layers of the absorption tower 3 are connected with the tower tray inlet pipe lines of the seventh, eighth and ninth layers of the absorption tower; the tower tray outlet pipe lines on the seventh, eighth and ninth layers of the absorption tower are connected with a high level tank outlet; and besides, the outlet pipelines are connected with an evaporator shell side chilled water inlet. According to the system, the fresh water consumption is saved, the energy consumption of a nitric acid device is reduced, the oxidation ratio and absorption rate of nitric acid production are increased, and the daily output can be increased by 4 tons.
Description
Technical field
The utility model relates to a kind of nitric acid production plant oxidation absorption tower cooling water recirculation system.
Background technology
Nitric acid plant is that a cover uses air and ammonia generation oxidizing reaction to produce the device of nitric acid, and the nitrogen oxide gas mixture that reaction generates is removed acid mist by mist eliminator, mixes with the secondary air that comes out from bleaching tower, is entered in the tower by bottom, oxidation absorption tower.Bottom, oxidation absorption tower is oxidation panel, and top is absorber portion.After gas mixture entered in the tower, nitric oxide gas continued to be oxidized to nitrogen peroxide at oxidation panel, enters absorber portion then, and rare nitric acid that nitrogen peroxide is got off by the absorption tower overhead streams absorbs.Absorbing heat and the heat of dilution is taken away by the water coolant in the serpentine tube on each layer column plate.
The oxidation absorption process of nitric acid plant is very important, uses fresh water to cool off in a large number.But the fresh water after using directly enters pipe network, and there is un-reasonable phenomenon in energy utilization to fresh water.
The utility model content
The purpose of this utility model provides a kind of nitric acid production plant oxidation absorption tower cooling water recirculation system, increases a freezing unit, with the 38th, 40,42 layer of tower tray on the oxidation absorption tower; The the 4th, 5,6,7,8,9 layer of tower tray changes into and uses freeze cycle water on the oxidizing tower, saves the fresh water consumption, reduces the energy consumption of nitric acid plant.
Nitric acid production plant oxidation described in the utility model absorption tower cooling water recirculation system comprises: freezing unit, air compressor, absorption tower, high level tank, oxidation absorption tower; The vaporizer shell side chilled water outlet pipeline of freezing unit is connected with air compressor inlet pipeline or compression by-pass line, the 38th of vaporizer chilled water outlet pipeline or vaporizer bypass outlet line and oxidation absorption tower, 40,42 layers of tower tray source line connect, the 38th of oxidation absorption tower, 40, the 4th of 42 layers of tower tray outlet line and absorption tower, 5, the entrance of 6 three layers of tower tray connects, the 4th of absorption tower 3,5, the 7th of the outlet of 6 three layers of tower tray and absorption tower, 8,9 three layers of tower tray source line connect, the 7th of absorption tower, 8,9 three layers of tower tray outlet line are connected with the high level tank outlet, and outlet line is connected with vaporizer shell side chilled water inlet simultaneously.
Freezing unit is by vaporizer, compressor A, compressor B, vaporizer, strainer A, filter B, water cooler A, water cooler B;
Water cooler A shell side is connected with compressor A outlet, water cooler B shell side is connected with compressor B outlet, water cooler A, water cooler B are connected with vaporizer tube side entrance by strainer A, filter B, and the outlet of vaporizer tube side is connected with compressor A, compressor B entrance respectively; Water cooler A, water cooler B tube side are connected with the upper and lower water pipeline of CW respectively.
The nitrogen oxide gas mixture that reaction generates, through the gas-liquid defogging device, the nitric acid drop that produces in the reaction process is entered in the nitric acid holding tank, nitric acid in the holding tank is sent back on the tower tray of absorption tower corresponding concentration by the nitric acid pump, nitrogen oxide gas after the processing enters the oxidation absorption tower, after carrying out further oxidation through the oxidation panel of bottom, entering the top absorber portion absorbs, the nitrogen oxide gas that is not absorbed continues to enter the absorption tower and proceeds to absorb, the tail gas that produces is from top of tower process gas-liquid separator separates, the nitric acid that produces enters in the nitric acid holding tank, nitric acid in the holding tank is sent back on the tower tray of absorption tower corresponding concentration by the nitric acid pump, tail gas enters the vent gas treatment retort by after the interchanger heat exchange, by with the reaction of ammonia, generate the nitrogen G﹠W and enter in the atmosphere; The the 38th, 40, the 42 3 layer of tower tray that refrigerated water enters the oxidation absorption tower carries out heat exchange, and the 4th, 5,6,7,8, the 9 six layer of tower tray that enters the absorption tower after the heat exchange carries out heat exchange, returns freezing unit after the heat exchange.
Nitric acid production plant oxidation described in the utility model absorption tower cooling water recirculation system,
1, saves the consumption of fresh water;
2, reduce the energy consumption of nitric acid plant;
3, refrigerated water has lower temperature, can improve oxidation ratio and the specific absorption of nitric acid production;
Increase a freezing unit, water temperature is cooled to about 10 ℃, between absorption tower, refrigerator, carry out closed cycle; Per hour can save 100 tons of fresh waters, refrigeration comes into operation increases by 4 tons of output back every day.
Description of drawings
Fig. 1 nitric acid production plant oxidation absorption tower cooling water recirculation system.
Wherein: 1 oxidation absorption tower, 2 high level tanks, 3 absorption towers, 4 air compressor, 5 compressor A, 6 compressor B, 7 vaporizers, 8 strainer A, 9 filter B, 10 water cooler A, 11 water cooler B.
Embodiment
Nitric acid production plant oxidation described in the utility model absorption tower cooling water recirculation system comprises: freezing unit, air compressor 4, absorption tower 3, high level tank 2, oxidation absorption tower 1; The vaporizer 7 shell side chilled water outlet pipelines of freezing unit are connected with air compressor 4 source lines or compression by-pass line, the 38th of vaporizer 7 chilled water outlet pipelines or vaporizer bypass outlet line and oxidation absorption tower 1,40,42 layers of tower tray source line connect, the 38th of oxidation absorption tower 1,40, the 4th of 42 layers of tower tray outlet line and absorption tower 3,5, the entrance of 6 three layers of tower tray connects, the 4th of absorption tower 3,5, the 7th of the outlet absorption tower 3 of 6 three layers of tower tray, 8,9 three layers of tower tray source line connect, the 7th of absorption tower 3,8,9 three layers of tower tray outlet line are connected with high level tank 2 outlets, and outlet line is connected with vaporizer 7 shell side chilled water inlets simultaneously.
Freezing unit is by vaporizer 7, compressor A5, compressor B6, vaporizer 7, strainer A8, filter B 9, water cooler A10, water cooler B11;
Water cooler A10 shell side is connected with compressor A5 outlet, water cooler B11 shell side is connected with compressor B6 outlet, water cooler A10, water cooler B11 are connected with vaporizer 7 tube side entrances by strainer A8, filter B 9, and the outlet of vaporizer 7 tube sides is connected with compressor A5, compressor B6 entrance respectively; Water cooler A10, water cooler B11 tube side are connected with the upper and lower water pipeline of CW respectively.
Claims (2)
1. a nitric acid production plant oxidation absorption tower cooling water recirculation system comprises: freezing unit, air compressor, absorption tower, high level tank, oxidation absorption tower; It is characterized in that: the vaporizer shell side chilled water outlet pipeline of freezing unit is connected with air compressor inlet pipeline or compression by-pass line, the 38th of vaporizer chilled water outlet pipeline or vaporizer bypass outlet line and oxidation absorption tower, 40,42 layers of tower tray source line connect, the 38th of oxidation absorption tower, 40, the 4th of 42 layers of tower tray outlet line and absorption tower, 5, the entrance of 6 three layers of tower tray connects, the 4th of absorption tower (3), 5, the 7th of the outlet absorption tower of 6 three layers of tower tray, 8,9 three layers of tower tray source line connect, the 7th of absorption tower, 8,9 three layers of tower tray outlet line are connected with the high level tank outlet, and outlet line is connected with vaporizer shell side chilled water inlet simultaneously.
2. nitric acid production plant oxidation according to claim 1 absorption tower cooling water recirculation system,
Freezing unit comprises: vaporizer, compressor A, compressor B, vaporizer, strainer A, filter B, water cooler A, water cooler B; It is characterized in that:
Water cooler A shell side is connected with compressor A outlet, water cooler B shell side is connected with compressor B outlet, water cooler A, water cooler B are connected with vaporizer tube side entrance by strainer A, filter B, and the outlet of vaporizer tube side is connected with compressor A, compressor B entrance respectively; Water cooler A, water cooler B tube side are connected with the upper and lower water pipeline of CW respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207393351U CN203173820U (en) | 2012-12-28 | 2012-12-28 | Cooling water recirculation system of oxidation absorption tower for nitric acid production device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012207393351U CN203173820U (en) | 2012-12-28 | 2012-12-28 | Cooling water recirculation system of oxidation absorption tower for nitric acid production device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203173820U true CN203173820U (en) | 2013-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012207393351U Expired - Fee Related CN203173820U (en) | 2012-12-28 | 2012-12-28 | Cooling water recirculation system of oxidation absorption tower for nitric acid production device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203173820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449388A (en) * | 2013-09-10 | 2013-12-18 | 安徽淮化股份有限公司 | Recycling method of dilute nitric acid and special equipment for method |
| CN103496680A (en) * | 2013-10-10 | 2014-01-08 | 中国海洋石油总公司 | Preparation method of NOx gas with ultrahigh concentration and method for producing concentrated nitric acid by using NOx gas with ultrahigh concentration |
-
2012
- 2012-12-28 CN CN2012207393351U patent/CN203173820U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103449388A (en) * | 2013-09-10 | 2013-12-18 | 安徽淮化股份有限公司 | Recycling method of dilute nitric acid and special equipment for method |
| CN103449388B (en) * | 2013-09-10 | 2016-03-30 | 安徽淮化股份有限公司 | A kind of dust technology recovery method and specific equipment thereof |
| CN103496680A (en) * | 2013-10-10 | 2014-01-08 | 中国海洋石油总公司 | Preparation method of NOx gas with ultrahigh concentration and method for producing concentrated nitric acid by using NOx gas with ultrahigh concentration |
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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: 20130904 Termination date: 20211228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |