CN102836652B - Process device for preparing nitric acid aqueous solution - Google Patents
Process device for preparing nitric acid aqueous solution Download PDFInfo
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- CN102836652B CN102836652B CN201210314812.4A CN201210314812A CN102836652B CN 102836652 B CN102836652 B CN 102836652B CN 201210314812 A CN201210314812 A CN 201210314812A CN 102836652 B CN102836652 B CN 102836652B
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- acid
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Abstract
The invention provides a process device for preparing a nitric acid aqueous solution. The device comprises an air bleaching tower, a commercial acid tank, a 98 acid high-level tank, a 60 acid tank, a diluted acid tank, an air sucking system and an air compressor, wherein the air bleaching tower is communicated with the commercial acid tank through a pipeline; the air bleaching tower is communicated with the 98 acid high-level tank, the 60 acid tank and the diluted acid tank through a pipeline respectively; the mixer is arranged among the 98 acid high-level tank, the 60 acid tank, the diluted acid tank and the air bleaching tower; the upper end of the air bleaching tower is connected with the air sucking system; the air compressor is communicated with the air bleaching tower through a pipeline; a connection pipeline between the air compressor and the air bleaching tower is provided with an air cooler; the air cooler is further communicated with the input port of the commercial acid tank; the input port of the commercial acid tank is connected with the air sucking system; the output port of the commercial acid tank is connected with the air bleaching tower through the mixer; and a connection pipeline between a commercial acid output port and the mixer is provided with an acid pump. Due to the adoption of the device, the requirements of customers in different industries on acid preparation can be met, and the problem of standard exceeding of carbon dioxide can be solved effectively; and the process device is environment-friendly and is convenient.
Description
Technical field
The present invention relates to a kind of process unit configuring aqueous acid, specifically a kind of process unit that can configure various content aqueous solution of nitric acid very easily.
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, ionizes completely in water, and under normal temperature, nitric acid weak solution is water white transparency shape, and concentrated solution shows brown.Nitric acid is unstable, easily sees that light decomposes, should keep in Dark Place in brown bottle in shady place, forbid to contact with reducing agent.Nitric acid is industrially main to be produced with ammonia oxidation, and in order to manufacture 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.Current nitric acid is applied in all trades and professions, 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, IT industry needs 68% nitric acid, iron and steel cleaning industry many demands 30-40% nitric acid.But the concentration of nitric acid that two pressurization dilute nitric acid production device is produced is 60%, and the concentration of nitric acid that a nitre device is produced is 98%, produce nitre device by-product grade dust technology between red fuming nitric acid (RFNA), its concentration is 3-5%, but said apparatus is produced the concentration of nitric acid and differed and meet customer need surely, and client still needs the aqueous solution of nitric acid preparing variable concentrations voluntarily, in preparation aqueous solution of nitric acid process, red fuming nitric acid (RFNA) and dust technology mixing can produce heat, and cause a small amount of nitric acid to decompose, reaction equation is
shouldfor 4HNO
3==2H
2o+4NO
2+ O
2, thus produce a large amount of red comprehensive look NO2 gas entered environment, pollute.
Summary of the invention
The object of the present invention is to provide a kind of process unit that can configure various content aqueous solution of nitric acid very easily.
Present invention employs following technical scheme: a kind of process unit 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 dilute acid bath pipeline with described 98 sour head tanks, 60 acid tanks respectively, described 98 sour head tanks, 60 acid tanks and be provided with blender between dilute acid bath and air bleaching tower, the upper end of described air bleaching tower is connected with 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 is also connected with the input port of commodity acid tank, the input port of described commodity acid tank is connected with described negative system of taking out, described commodity acid tank delivery outlet is connected with air bleaching tower through blender, and the connecting line between described commercial acid delivery outlet and blender is provided with sour pump.
The corresponding connecting line of the described 98 high grooves in sour position, 60 acid tanks and dilute acid bath is equipped with flowmeter.
beneficial effect: the nitric acid that various content can be allotted after the mixing ratio of the present invention by the good various acid of Valve controlling on each pipeline of control through device of the present invention, can very easily for every profession and trade provides the nitric acid of corresponding ratio, logical overcooled air bleaching nitric acid, suppress nitric acid decomposes to generate nitrogen dioxide simultaneously, avoid nitrogen dioxide and exceed standard to the pollution of air.
Accompanying drawing explanation
Fig. 1 is connection diagram of the present invention.
In figure: 1, air bleaching tower, 2, commercial acid tank, 3, 98 sour head tanks, 4, negative pressure system, 5, air compressor machine, 6, gas cooler, 7, blender, 8, acid 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.
Detailed description of the invention
Be described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this process unit comprises air bleaching tower 1, the sour head tank 3 of commercial acid tank 2,98, negative pressure system 4, air compressor machine 5, gas cooler 6,60 acid tanks 11 and dilute acid bath 12.In the present invention 98 sour head tank 3,60 acid tanks 11 and dilute acid bath 12 be respectively concentration of nitric acid be 98% acid solution, concentration of nitric acid be 60% acid solution and a nitre device byproduct concentration of nitric acid be the acid solution of 3-5%.
Air bleaching tower 1 is communicated with commodity acid tank 2 pipeline, the input of air bleaching tower 2 respectively head tank 3,60 acid tank 11 sour with 98 is communicated with dilute acid bath 12 pipeline, be parallel relationship between 98 sour head tank 3,60 acid tanks 11 and dilute acid bath 12, conveniently observe and control the flow of acid, connecting line between each acid tank and blender 7 is provided with flowmeter 9, be provided with blender 7 between acid tank and air bleaching tower 1, the upper end of air bleaching tower 1 with take out negative system 4 and be connected; Air compressor machine 5 and gas cooler 6 successively pipeline are connected to air bleaching tower 1 hypomere, the output of gas cooler 6 is connected with the input port of commodity acid tank 2, take out negative system 4 to be connected with the input port pipeline of commodity acid tank 2, the delivery outlet of commodity acid tank 2 is connected through the epimere of blender 7 with air bleaching tower 1.Pipeline between the delivery outlet of described commodity acid tank 2 and blender 7 is provided with the sour pump 8 for providing negative pressure power, in order to the switch controlling each device is respectively equipped with as by-pass valve control shown on Fig. 1 on each pipeline, the workflow of configuration acid is: when device stops, shown in figure, each valve is in closed condition, first determine the concentration of configuration acid, Open valve g9.7, f9.6, c9.3, start air compressor machine
1, as prepared more than 60% acid time, Open valve a9.1, b9.2, d9.4, the flow of 60 acid in 98 acid and 60 acid tanks 10 is controlled in 98 sour head tanks 3 by flowmeter 9, enter in air bleaching tower 1 by blender 7, the air of cooling and mixed acid reverse flow, gas is taken away by valve c9.3, the acid solution configured is flowed directly in commodity acid tank 2 in air bleaching tower 1.
2, as configured less than 60% acid time, Open valve d9.4, e9.5, the flow of acid in 60 acid tanks 10 and dilute acid bath 12 is controlled well with flowmeter, enter in air bleaching tower 1 by blender 7, the air of cooling and mixed acid reverse flow, gas is taken away by valve c9.3, the acid solution configured is flowed directly in commodity acid tank 2 in air bleaching tower 1.
After as qualified by analysis in the acid solution in commodity acid tank 2, Open valve h9.9, l9.12, open sour pump 8, and commercial acid is by the entrucking of sour pump 8, and preparation terminates, then shut down, pump, closes respective valves.
After as defective by analysis in the acid solution in commodity acid tank 2, occur that nitrogen dioxide content is not up to standard, open valve g9.7, f9.8, h9.9, start air compressor machine 5, air goes out from commodity acid tank 2 air transverse tube drill hole, directly bleaches commercial acid, until qualified.Because of commodity acid tank by valve 11 with take out negative system 4 and be connected, the nitrogen exceeded standard of desorb is taken away by taking out negative system 4.
As not up to standard in there is the concentration of acid, Open valve h9.9 and k9.11, valve-off l9.12 open sour pump 8 and are reclaimed by the acid air bleaching tower 1 in commercial acid, and preparation terminates, then shutdown, pump, close respective valves.
Claims (2)
1. prepare the process unit of aqueous solution of nitric acid for one kind, 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 is the sour head tank with 98 respectively, 60 acid tanks are communicated with dilute acid bath pipeline, described 98 sour head tanks, 60 acid tanks and be provided with blender between dilute acid bath and air bleaching tower, the upper end of described air bleaching tower is communicated with described negative system pipeline of taking out, described air compressor machine is communicated with described air bleaching tower pipeline, the connecting line of described air compressor machine and described air bleaching tower is provided with gas cooler, the input port of described commodity acid tank is connected with described negative system of taking out, the delivery outlet of described commodity acid tank is communicated with air bleaching tower through blender, and the connecting line of described commodity acid tank delivery outlet and blender is provided with sour pump, described gas cooler is also communicated with commodity acid tank input port pipeline.
2. the process unit of preparation aqueous solution of nitric acid according to claim 1, is characterized in that: the connecting line that described 98 sour head tanks, 60 acid tanks and dilute acid bath are corresponding is provided with flowmeter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210314812.4A CN102836652B (en) | 2012-08-30 | 2012-08-30 | Process device for preparing nitric acid aqueous solution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210314812.4A CN102836652B (en) | 2012-08-30 | 2012-08-30 | Process device for preparing nitric acid aqueous solution |
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| Publication Number | Publication Date |
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| CN102836652A CN102836652A (en) | 2012-12-26 |
| CN102836652B true CN102836652B (en) | 2015-05-27 |
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| CN201210314812.4A Expired - Fee Related CN102836652B (en) | 2012-08-30 | 2012-08-30 | Process device for preparing nitric acid aqueous solution |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395758B (en) * | 2013-08-02 | 2015-03-25 | 柳州化工股份有限公司 | Apparatus used for preparing aqueous nitric acid solution |
| CN103395759B (en) * | 2013-08-02 | 2015-01-14 | 柳州化工股份有限公司 | Decolouring method of prepared aqueous nitric acid solution |
| CN103466570A (en) * | 2013-08-31 | 2013-12-25 | 安徽淮化股份有限公司 | Device and method for directly producing high concentration nitric acid by two-pressure dilute nitric acid device |
| CN103480309B (en) * | 2013-09-03 | 2016-07-20 | 安徽淮化股份有限公司 | A kind of neutralization device of concentrated nitric acid normal-pressure production of ammonium nitrate |
| CN103480295A (en) * | 2013-09-03 | 2014-01-01 | 安徽淮化股份有限公司 | Device for quickly mixing ammonium nitrate water solution |
| CN103482652B (en) * | 2013-09-03 | 2016-08-17 | 安徽淮化股份有限公司 | A kind of quality control system of storage tank aqueous ammonium nitrate solution |
| CN103569978B (en) * | 2013-11-01 | 2015-11-18 | 安徽金禾实业股份有限公司 | A kind of nitric acid air lift decoloring method and device |
| CN104986743B (en) * | 2015-07-09 | 2018-07-27 | 安徽淮化股份有限公司 | Bleaching process and its device in a kind of nitric acid process for preparation |
Citations (5)
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| CN1686790A (en) * | 2005-04-18 | 2005-10-26 | 天脊煤化工集团有限公司 | Method and equipment for producing nitric acid in optional intermediate density |
| CN101837961A (en) * | 2010-05-25 | 2010-09-22 | 安徽淮化股份有限公司 | Dilute nitric acid preparing method meeting requirements of energy saving and emission reduction as well as low cost and device |
| CN201722150U (en) * | 2010-05-25 | 2011-01-26 | 安徽淮化股份有限公司 | Dilute nitric acid production device utilizing magnesium nitrate tail water in concentrated nitric acid production |
| CN102502541A (en) * | 2011-10-21 | 2012-06-20 | 天津华景化工新技术开发有限公司 | Production method of high-concentration dilute nitric acid |
| CN202778293U (en) * | 2012-08-30 | 2013-03-13 | 安徽淮化股份有限公司 | Process device for preparing aqueous solution of nitric acid |
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2012
- 2012-08-30 CN CN201210314812.4A patent/CN102836652B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1686790A (en) * | 2005-04-18 | 2005-10-26 | 天脊煤化工集团有限公司 | Method and equipment for producing nitric acid in optional intermediate density |
| CN101837961A (en) * | 2010-05-25 | 2010-09-22 | 安徽淮化股份有限公司 | Dilute nitric acid preparing method meeting requirements of energy saving and emission reduction as well as low cost and device |
| CN201722150U (en) * | 2010-05-25 | 2011-01-26 | 安徽淮化股份有限公司 | Dilute nitric acid production device utilizing magnesium nitrate tail water in concentrated nitric acid production |
| CN102502541A (en) * | 2011-10-21 | 2012-06-20 | 天津华景化工新技术开发有限公司 | Production method of high-concentration dilute nitric acid |
| CN202778293U (en) * | 2012-08-30 | 2013-03-13 | 安徽淮化股份有限公司 | Process device for preparing aqueous solution of nitric acid |
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| CN102836652A (en) | 2012-12-26 |
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Effective date of registration: 20210413 Address after: 234000 No. 157, Xichang Road, Suzhou, Anhui Patentee after: WANBEI COAL-ELECTRICITY GROUP Co.,Ltd. Address before: 232038 Anhui Province, Huainan city tianjia'an District Quanshan Patentee before: ANHUI HUAIHUA Co.,Ltd. |
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Granted publication date: 20150527 Termination date: 20210830 |