CN2538398Y - Tower for concentrating nitric acid - Google Patents
Tower for concentrating nitric acid Download PDFInfo
- Publication number
- CN2538398Y CN2538398Y CN 02213457 CN02213457U CN2538398Y CN 2538398 Y CN2538398 Y CN 2538398Y CN 02213457 CN02213457 CN 02213457 CN 02213457 U CN02213457 U CN 02213457U CN 2538398 Y CN2538398 Y CN 2538398Y
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- CN
- China
- Prior art keywords
- tower
- nitric acid
- liquid
- air drain
- distributor
- 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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- Physical Or Chemical Processes And Apparatus (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
A nitric acid condensation tower is provided. Regular ceramic corrugated plate fillers and a distributed liquid distributor are adopted in the tower. The liquid is sprayed on the distributor through a swirling flow board; certain liquid level is formed on the tower tray of the distributor and is sprayed to the filler layer through a down pour hole. The distributor can automatically adjust the abundance of the liquid according to the load of the tower; the liquid can be fully and evenly distributed under various loads. The utility model can reduce the resistance of the tower, lowers the consumption of the steam and greatly improves the production capacity of the tower.
Description
Technical field:
The utility model is relevant with the production equipment of red fuming nitric acid (RFNA), more specifically says so about the improvement technology of nitric acid concentration tower.
Background technology:
With magnesium nitrate system red fuming nitric acid (RFNA) technology is to make dehydrating agent with magnesium nitrate solution, produces red fuming nitric acid (RFNA) by the smart gold-plating of rare nitric acid.Its device structure is simple, does not produce harmful exhaust, the product quality height, and easy to operate, operating cost is low, and the investment payback time is short, and is good in economic efficiency.
The key equipment of red fuming nitric acid (RFNA) production is a nitric acid concentration tower, concentration tower by stripping section and slightly part such as the section of heating up in a steamer form, include filler in the tower, redistributor, liquid distribution trough, overflowing board etc., DN38, DN25 pottery rectangular saddle ring dumped packing and shower nozzle liquid distribution trough are housed in the existing concentration tower usually, to contain nitre amount high tower internal resistance big for rare magnesium in the production, the steam consumption height.
Summary of the invention:
The object of the present invention is to provide a kind of resistance little, higher mass-and heat-transfer efficient, the concentration tower structural design that steam consumption is lower arranged.
Solution of the present utility model is at first to adopt ceramic corrugated plate packing to substitute original ceramic rectangular saddle ring dumped packing.The pottery corrugated plate packing is compared with original filler has advantages such as geometry is reasonable, specific area is big, voidage is big, resistance is little, operating flexibility is big, anti-blocking is strong.It has higher mass-and heat-transfer efficient, can improve the production load of tower after the use, realizes energy-conservation, reduction steam consumption.
Adopt after the ceramic corrugated plate packing, original liquid distributor is not complementary with new filler, therefore another important measures of the present utility model are that original shower nozzle liquid distribution trough has also been done new design, liquid distribution trough with an even distribution type substitutes original liquid distribution trough, makes it to be complementary with new filler.
The said even distribution type liquid distribution trough of the utility model is to process with the polytetrafluoroethylene (PTFE) synthetic material.Its structure is that a tower tray 9 is provided with several and rises air drain 8, is provided with liquid reducing hole 11 in the outside that rises air drain, rises air drain and is fixed on the tower tray by pin 10.Per pass rise air drain above all adorn a boat-shaped calotte 6, said boat-shaped calotte is fixed in the top that rises the air drain mouth by several gusset bars 7, and with rise the air drain mouth and keep certain distance, so just constitute a complete liquid distribution trough.
Liquid (rare nitric acid) is sprayed onto on the boat-shaped calotte 6 through overflowing board 5 like this, overflows to tower tray 9 from calotte 6 again, forms corresponding liquid level on tower tray, and divides equably and be sprinkled upon on the packing layer by the liquid aperture 11 that falls that rises air drain 8 outsides.The liquid reducing hole in the lifting groove outside is the multilayer setting, and the liquid level on the tower tray is high more, and liquid then can flow to packing layer by more liquid reducing hole, spills to the liquid of packing layer just many more through liquid reducing hole.Liquid distribution trough just can be regulated the abundance of liquid automatically according to the load of tower like this.And under the load condition of various towers, all can reach the uniform distribution of liquid.Gas in the tower then rises by rising air drain 8.
By above improvement, replace original filler to increase contact area with regular corrugated plate packing, improved mass transfer, heat-transfer effect in the tower.After using even distribution type liquid distribution trough of the present invention, liquid can distribute full and uniformly.Thereby output of column improves greatly, and steam consumption descends, and its main performance index is as shown in table 1.
Table 1 the utility model and prior art performance are relatively
| The top order | Unit | Prior art | The utility model |
| Single tower daily output | T | 30 | 75 |
| Steam consumption | T | 2.45 | 2.10 |
| Rare magnesium contains nitre | ％ | ＜0.35 | ＜0.15 |
| | 1∶4 | 1∶3.5 | |
| Reflux ratio | 1.5 | 1.2 | |
| The tower resistance | Kpa | 3.922 | 1.471 |
Description of drawings: Fig. 1 is the utility model nitric acid concentration tower structural representation; Fig. 2 is that the utility model liquid distribution trough cross-section structure enlarged diagram Fig. 3 is among perspective view Fig. 1 of liquid distribution trough among Fig. 2 among Fig. 1,1 tower body, 2 fillers, 3 redistributors, 4 liquid distribution troughs, 5 overflowing boards.Among Fig. 2,6 calottes, 7 gusset bars, 8 liters of air drains, 9 tower trays, 10 pins, 11 liquid reducing holes.
The specific embodiment:
As shown in Figure 1, in the tower body 1 of nitric acid concentration tower, insert ceramic corrugated plate packing 2, in the middle of the packing layer, the alternate several roads redistributor 3 that is equipped with, the quantity of distributor can be decided according to the tower body height; Overflowing board 5 and even distribution type liquid distribution trough 4 are housed at the top of tower body, and said liquid distribution trough is between packing layer and the overflowing board, so just constitutes a complete nitric acid concentration tower.This device can reduce the resistance of tower, reduces steam consumption, improves output of column greatly.
Claims (3)
1, a kind of nitric acid concentration tower, by stripping section and rectifying section, two parts are formed, and include filler, redistributor, liquid distribution trough, overflowing board etc. in the tower, it is characterized in that having adopted in the tower ceramic corrugated plate packing and even distribution type liquid distribution trough.
2, according to the described nitric acid concentration tower of claim 1, it is characterized in that said even distribution type liquid distribution trough is that tower tray (9) is provided with several and rises air drain (8), be provided with liquid reducing hole (11) in the outside that rises air drain, rising air drain is fixed on the tower tray by pin (10), per pass rise air drain above a boat-shaped calotte (6) is housed, said boat-shaped calotte is fixed in the top that rises the air drain mouth by gusset bar (7), and with rise the air drain mouth and keep suitable distance.
3,, it is characterized in that said even distribution type liquid distribution trough is to process with the polytetrafluoroethylene (PTFE) synthetic material according to the described nitric acid concentration tower of claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213457 CN2538398Y (en) | 2002-03-25 | 2002-03-25 | Tower for concentrating nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02213457 CN2538398Y (en) | 2002-03-25 | 2002-03-25 | Tower for concentrating nitric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2538398Y true CN2538398Y (en) | 2003-03-05 |
Family
ID=33692955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02213457 Expired - Fee Related CN2538398Y (en) | 2002-03-25 | 2002-03-25 | Tower for concentrating nitric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2538398Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396360C (en) * | 2006-04-24 | 2008-06-25 | 南京大学 | A nitric oxides (NOX) waste pollution control in industrial process and resource reclaiming method |
| CN101856567A (en) * | 2010-05-26 | 2010-10-13 | 重庆大学 | Clapboard structure of extracting tank |
-
2002
- 2002-03-25 CN CN 02213457 patent/CN2538398Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100396360C (en) * | 2006-04-24 | 2008-06-25 | 南京大学 | A nitric oxides (NOX) waste pollution control in industrial process and resource reclaiming method |
| CN101856567A (en) * | 2010-05-26 | 2010-10-13 | 重庆大学 | Clapboard structure of extracting tank |
| CN101856567B (en) * | 2010-05-26 | 2012-09-26 | 重庆大学 | Clapboard structure of extracting tank |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Zhang Lisan Document name: Notification of Termination of Patent Right |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |