CN202778293U - Process device for preparing aqueous solution of nitric acid - Google Patents
Process device for preparing aqueous solution of nitric acid Download PDFInfo
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- CN202778293U CN202778293U CN 201220437086 CN201220437086U CN202778293U CN 202778293 U CN202778293 U CN 202778293U CN 201220437086 CN201220437086 CN 201220437086 CN 201220437086 U CN201220437086 U CN 201220437086U CN 202778293 U CN202778293 U CN 202778293U
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- bleaching tower
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Abstract
The utility model provides a process device for preparing an aqueous solution of nitric acid, which comprises an air bleaching tower, a commercial acid tank, a No.98 acid elevated tank, a No.60 acid tank, a diluted acid tank, a negative pumping system and an air compressor; the air bleaching tower is communicated with the commercial acid tank through a pipeline; the air bleaching tower is communicated with the No.98 acid elevated tank, the No.60 acid tank and the diluted acid tank through pipelines respectively; a mixer is arranged among the No.98 acid elevated tank, the No.60 acid tank and the air bleaching tower; the upper end of the air bleaching tower is connected with the negative pumping system; the air compressor is communicated with the air bleaching tower through a pipeline, and an air cooler is arranged on the pipeline for connecting the air compressor with the air bleaching tower; and the air cooler is also communicated with an input port of the commercial acid tank, the input port of the commercial acid tank is connected with the negative pumping system, an output port of the commercial acid tank is connected with the air bleaching tower through the mixer, and an acid pump is arranged on the pipeline for connecting the output port of the commercial acid tank with the mixer. The device can meet the requirements of customers in different industries for acid preparation, can effectively solve the problem that nitrogen dioxide exceeds the standard, and is environment-friendly and convenient.
Description
Technical field
The utility model relates to a kind of process unit that disposes aqueous acid, specifically a kind of process unit that can dispose very easily various content aqueous solution of nitric acid.
Background technology
Nitric acid (nitric acid) molecular formula is HNO3, is the inorganic acid of a kind of strong oxidizing property, severe corrosive, and acid anhydrides is dinitrogen pentoxide.Nitric acid is soluble in water, fully ionization in water, and the nitric acid weak solution is the water white transparency shape under the normal temperature, and concentrated solution is aobvious brown.Nitric acid is unstable, sees that easily light decomposes, and should keep in Dark Place in shady place in brown bottle, forbids to contact with reducing agent.Mainly with ammonia oxidation production, in order to make chemical fertilizer, explosive, nitrate etc., in organic chemistry, the mixed liquor of red fuming nitric acid (RFNA) and the concentrated sulfuric acid is important nitrating agent to nitric acid industrial.Nitric acid is applied in all trades and professions at present, but different industries requires to differ to concentration of nitric acid, the ammonium nitrate that neutralisation is produced needs 37-43% nitric acid as raw material, and the ammonium nitrate that pressurization is produced needs 60% nitric acid as raw material, the quick-fried industry of the people needs 80-82% nitric acid, the IT industry needs 68% nitric acid, many demands of iron and steel cleaning industry 30-40% nitric acid.But the concentration of nitric acid of two pressurization dilute nitric acid production device production is 60%, and the concentration of nitric acid of a nitre device production is 98%, the rare nitric acid of nitre device by-product grade between the production red fuming nitric acid (RFNA), its concentration is 3-5%, but said apparatus produces the concentration of nitric acid and differ and meet customer need surely, and the client still need prepare the aqueous solution of nitric acid of variable concentrations voluntarily, in preparation aqueous solution of nitric acid process, red fuming nitric acid (RFNA) and rare nitric acid mix can produce heat, causes a small amount of nitric acid to decompose, and reaction equation is 4HNO
3==2H
2O+4NO
2+ O
2Thereby, produce a large amount of red comprehensive look NO2 gas entered environments, pollute.
The utility model content
The purpose of this utility model is to provide a kind of process unit that can dispose very easily various content aqueous solution of nitric acid.
The utility model has adopted following technical scheme: a kind of process unit of preparing aqueous solution of nitric acid, this device comprises air bleaching tower, commodity acid tank, 98 sour head tanks, 60 acid tanks, dilute acid bath, takes out negative system and air compressor machine, described air bleaching tower is communicated with commercial acid barrel line, described air bleaching tower is communicated with described 98 sour head tanks, 60 acid tanks and dilute acid bath pipeline respectively, be provided with blender between described 98 sour head tanks, 60 acid tanks and dilute acid bath and the air bleaching tower, the upper end of described air bleaching tower links to each other with the described negative system of taking out; Described air compressor machine is communicated with described air bleaching tower pipeline, and the connecting line of described air compressor machine and described air bleaching tower is provided with aerial cooler; Described aerial cooler also is connected with the input port of commodity acid tank, the input port of described commodity acid tank links to each other with the described negative system of taking out, described commodity acid tank delivery outlet links to each other with the air bleaching tower through blender, and the connecting line between described commercial acid delivery outlet and the blender is provided with sour pump.
Be equipped with flowmeter on the corresponding connecting line of the high groove in described 98 acid positions, 60 acid tanks and dilute acid bath.
Beneficial effect: the utility model is controlled the nitric acid that can allot through device of the present utility model various content after the mixing ratio of various acid well by controlling valve on each pipeline, the nitric acid of corresponding ratio can be provided for every profession and trade very easily, logical overcooled air bleaching nitric acid, suppress simultaneously the nitric acid decomposes and generate nitrogen dioxide, avoided nitrogen dioxide to exceed standard to the pollution of air.
Description of drawings
Fig. 1 is connection diagram of the present utility model.
Among the figure: 1, air bleaching tower, 2, the commercial acid tank, 3,98 sour head tanks, 4, negative pressure system, 5, air compressor machine, 6, gas cooler, 7, blender, 8, sour pump, 9.1, valve a, 9.2, valve b, 9.3, valve c, 9.4, valve d, 9.5, valve e, 9.6, valve f, 9.7, valve g, 9.8, valve h, 9.9, valve i, 9.10, valve j, 9.11, valve k, 9.12, valve l, 10,60 acid tanks, 11, flowmeter, 12, dilute acid bath.
The specific embodiment
Be described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this process unit comprises air bleaching tower 1, commercial acid tank 2,98 sour head tanks 3, negative pressure system 4, air compressor machine 5, gas cooler 6,60 acid tanks 11 and dilute acid bath 12.To be respectively concentration of nitric acid be that 98% acid solution, concentration of nitric acid are that 60% acid solution and a nitre device byproduct concentration of nitric acid are the acid solution of 3-5% for 98 sour head tanks 3,60 acid tanks 11 and dilute acid bath 12 in the utility model.
1, when preparing more than 60% acid, Open valve a9.1, b9.2, d9.4, control in the 98 sour head tanks 3 flow of 60 acid in 98 acid and 60 acid tanks 10 by flowmeter 9, enter in the air bleaching tower 1 by blender 7, air and the mixed acid reverse flow of cooling, gas is taken away by valve c9.3, and the acid solution that configures in the air bleaching tower 1 is flowed directly in the commodity acid tank 2.
2, when disposing below 60% acid, Open valve d9.4, e9.5, control the flow of acid in 60 acid tanks 10 and the dilute acid bath 12 well with flowmeter, enter in the air bleaching tower 1 by blender 7, air and the mixed acid reverse flow of cooling, gas is taken away by valve c9.3, and the acid solution that configures in the air bleaching tower 1 is flowed directly in the commodity acid tank 2.
After qualified by analysis such as the acid solution in the commodity acid tank 2, Open valve h9.9, l9.12 open sour pump 8, and commercial acid is by sour pump 8 entruckings, and preparation finishes, and then shut down, pump, close respective valves.
After defective by analysis such as the acid solution in the commodity acid tank 2, it is not up to standard nitrogen dioxide content to occur, opens valve g9.7, f9.8, and h9.9 starts air compressor machine 5, and air goes out from commodity acid tank 2 air transverse tube drill hole, directly bleaches commercial acid, until qualified.Because of the commodity acid tank by valve 11 with take out negative system 4 and link to each other, the nitrogen that exceeds standard of desorb is taken away by taking out negative system 4.
As it is not up to standard sour concentration to occur, and Open valve h9.9 and k9.11, valve-off l9.12 open sour pump 8 acid in the commercial acid is reclaimed with air bleaching tower 1, and preparation finishes, and then shutdown, pump are closed respective valves.
Claims (5)
1. process unit of preparing aqueous solution of nitric acid, this device comprises air bleaching tower and commodity acid tank, described air bleaching tower is communicated with commercial acid barrel line, it is characterized in that: this process unit also comprises 98 sour head tanks, 60 acid tanks, dilute acid bath, air compressor machine and take out negative system, described air bleaching tower respectively with 98 sour head tanks, 60 acid tanks and dilute acid bath pipeline are communicated with, described 98 sour head tanks, be provided with blender between 60 acid tanks and dilute acid bath and the air bleaching tower, the upper end of described air bleaching tower is communicated with the described negative system pipeline of taking out, described air compressor machine is communicated with described air bleaching tower pipeline, and the connecting line of described air compressor machine and described air bleaching tower is provided with gas cooler.
2. the process unit of preparation aqueous solution of nitric acid according to claim 1 and 2, it is characterized in that: the input port of described commodity acid tank links to each other with the described negative system of taking out.
3. the process unit of preparation aqueous solution of nitric acid according to claim 3, it is characterized in that: the delivery outlet of described commodity acid tank is communicated with the air bleaching tower through blender, and the connecting line of described commodity acid tank delivery outlet and blender is provided with sour pump.
4. the process unit of preparation aqueous solution of nitric acid according to claim 1, it is characterized in that: described 98 sour head tanks, 60 acid tanks and connecting line corresponding to dilute acid bath are provided with flowmeter.
5. the process unit of preparation aqueous solution of nitric acid according to claim 2, it is characterized in that: described gas cooler also is communicated with commodity acid tank input port pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220437086 CN202778293U (en) | 2012-08-30 | 2012-08-30 | Process device for preparing aqueous solution of nitric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220437086 CN202778293U (en) | 2012-08-30 | 2012-08-30 | Process device for preparing aqueous solution of nitric acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202778293U true CN202778293U (en) | 2013-03-13 |
Family
ID=47805638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220437086 Expired - Fee Related CN202778293U (en) | 2012-08-30 | 2012-08-30 | Process device for preparing aqueous solution of nitric acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202778293U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836652A (en) * | 2012-08-30 | 2012-12-26 | 安徽淮化股份有限公司 | Process device for preparing nitric acid aqueous solution |
-
2012
- 2012-08-30 CN CN 201220437086 patent/CN202778293U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102836652A (en) * | 2012-08-30 | 2012-12-26 | 安徽淮化股份有限公司 | Process device for preparing nitric acid aqueous solution |
| CN102836652B (en) * | 2012-08-30 | 2015-05-27 | 安徽淮化股份有限公司 | Process device for preparing nitric acid aqueous solution |
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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: 20130313 Termination date: 20150830 |
|
| EXPY | Termination of patent right or utility model |