CN202478859U - Nitric acid solution preparation unit - Google Patents
Nitric acid solution preparation unit Download PDFInfo
- Publication number
- CN202478859U CN202478859U CN201220021025.6U CN201220021025U CN202478859U CN 202478859 U CN202478859 U CN 202478859U CN 201220021025 U CN201220021025 U CN 201220021025U CN 202478859 U CN202478859 U CN 202478859U
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- Prior art keywords
- sour
- nitric acid
- gas
- acid
- inlet
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Abstract
The utility model relates to a nitric acid solution preparation unit and relates to universal dilution equipment in the chemical or physical field. The nitric acid solution preparation unit has the advantages that the nitric acid solution preparation unit can be used to prepare nitric acid solution of any concentration, no NO2 gas is emitted to environment, and the NO2 gas reacts with water to generate nitric acid for reuse. The nitric acid solution preparation unit comprises a blower, a gas-liquid separator, an acid preparation tank, a dilute acid storage tank, a dilute acid circulation pump and an ejector. The acid preparation tank is provided with an air inlet and a gas outlet. An outlet of the blower is connected with a gas-liquid mixture inlet of the gas-liquid separator. A gas outlet of the gas-liquid separator is connected with an air inlet of the acid preparation tank. A gas outlet of the acid preparation tank is connected with a pumped medium inlet of the ejector. An outlet of the ejector is connected with an inlet of the dilute acid storage tank. An outlet of the dilute acid storage tank is connected with an inlet of the dilute acid circulation pump. An outlet of the dilute acid circulation pump is connected with a working medium inlet of the ejector.
Description
Technical field
The utility model relates to a kind of chemistry or the general diluent facilities of physical field, particularly relates to a kind of equipment that is used to prepare aqueous solution of nitric acid.
Background technology
Nitric acid (nitric acid) molecular formula is HNO
3, be the inorganic acid of a kind of strong oxidizing property, severe corrosive, acid anhydrides is a dinitrogen pentoxide.Nitric acid is soluble in water, ionization fully in water, and the nitric acid weak solution is the water white transparency shape under the normal temperature, and it is brown that concentrated solution shows.Nitric acid is unstable, is prone to see that light decomposes, and should in brown bottle, keep in Dark Place in shady place, 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 the red fuming nitric acid (RFNA) and the concentrated sulfuric acid is important nitrating agent to nitric acid in industry.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, and 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 the rare nitric acid production plant production of two pressurizations 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; Water and red fuming nitric acid (RFNA) or water and rare nitric acid mix can produce heat, causes a small amount of nitric acid to decompose, and reaction equation is 2HNO
3=H
2O+2NO
2Thereby, produce a large amount of red comprehensive look NO
2Gas gets into environment, pollutes.
The utility model content
The technical problem that the utility model will solve provides a kind of equipment of preparing aqueous solution of nitric acid, and this equipment can be used to prepare the aqueous solution of nitric acid of any concentration, and in process for preparation, does not have NO
2Gas is discharged in the environment and goes, NO
2Gas has carried out utilizing through having generated nitric acid with the water reaction again.
A kind of equipment of preparing aqueous solution of nitric acid; Comprise air blast, gas-liquid separator, sour preparing tank, diluted acid holding vessel, diluted acid circulating pump and injector; The acid preparing tank offers air intake, the liquid inlet that is used to dilute, treats diluent liquid inlet and gas vent; Wherein: air intake, the liquid inlet that is used to dilute, treat that diluent liquid inlet and gas vent all are positioned at apart from the above tank body of sour preparing tank bottom 2/3 tank body height; Blower export links to each other with the gas-liquid mixture inlet of gas-liquid separator; The gas vent of gas-liquid separator links to each other with the air intake of sour preparing tank, and the gas vent of sour preparing tank is taken out the medium inlet with the quilt of injector and linked to each other, and the outlet of injector links to each other with diluted acid holding vessel inlet; The outlet of diluted acid holding vessel links to each other with the diluted acid pump entry, and the diluted acid circulating-pump outlet links to each other with injector working media inlet.
The duty of the equipment of the utility model preparation aqueous solution of nitric acid is following: when the preparation aqueous solution of nitric acid; Nitric acid to be diluted or concentrated nitric acid solution are by treating that the diluent liquid inlet gets into sour preparing tank; The water or the nitric acid weak solution of dilution usefulness get into sour preparing tank by the liquid inlet that is used to dilute; In the process of mixing, rufous NO is arranged in sour preparing tank
2When gas generates; Open air blast and diluted acid circulating pump, air gets into gas-liquid separator by air blast, and the water vapour in the gas-liquid separator air becomes the liquid outlet outflow of liquid from gas-liquid separator; The air of removing water vapour gets into sour preparing tank from the gas vent of gas-liquid separator through the air intake of peracid preparing tank; Simultaneously under the effect of diluted acid circulating pump, be stored in water in the diluted acid holding vessel in advance by diluted acid circulating pump suction injector, water is sprayed into the mixing chamber in the injector as the working media in the injector at a high speed by nozzle; In mixing chamber, form negative pressure, make to get into air in the sour preparing tank and the NO that in sour preparing tank, generates
2Gas is drawn in the injector, and the two mixes the back and gets into the diluted acid holding vessel, reaction: 3NO below taking place
2+ H
2O=2HNO
3+ NO, 2NO+O
2=2NO
2, the NO that promptly generates
2Generating nitric acid with the water reaction utilizes again.
The equipment of the utility model preparation aqueous solution of nitric acid, the wherein said liquid inlet that is used to dilute has 1-2, and the said diluent liquid inlet of treating has 1-2.Nitric acid preparation method is following in the prior art: the concentration of nitric acid of the rare nitric acid production plant production of two pressurizations is 60%, and the concentration of nitric acid of a nitre device production is 98%, and nitre device byproduct is rare nitric acid between the production red fuming nitric acid (RFNA), and its concentration is 3-5%.It is the nitric acid of 3-5% that a liquid inlet that is used to dilute feeds concentration; Treat that diluent liquid inlet feeding concentration is 98% nitric acid for one; Concentration is that 60% nitric acid both can be used as and treats diluent liquid, also can be used as the liquid that is used to dilute, and this depends on the concentration of target aqueous solution of nitric acid.
The equipment of the utility model preparation aqueous solution of nitric acid; Wherein said sour preparing tank also offers sour loop head on its tank body more than 2/3 tank body height of bottom; The acid preparing tank offers sour loop exit on its tank body below 1/3 tank body height of bottom; In the outside of sour preparing tank, be connected with acid circulating pump between sour loop exit and the sour loop head.Open acid circulating pump, the solution in the sour preparing tank carries out self-loopa, makes the more even of mixing.
The equipment of the utility model preparation aqueous solution of nitric acid, the inside of wherein said sour preparing tank is equipped with the first conventional cooling water pipe apart from it below the 1/3 tank body height of bottom; The inside of said diluted acid holding vessel is equipped with second cooling water pipe apart from it below the 1/3 tank body height of bottom.First, second cooling water pipe is conventional cooling water pipe.Produce heat in the nitric acid dilution, in cooling water pipe, feed cooling water, prevent that nitric acid from decomposing.
The equipment difference from prior art of the utility model preparation aqueous solution of nitric acid is: the rufous NO that produces in the preparation salpeter solution process
2Be not discharged in the environment, but carried out utilizing again, both protected environment, obtained value product again through having generated nitric acid with the water reaction.
Be described further below in conjunction with the equipment of accompanying drawing the utility model preparation aqueous solution of nitric acid.
Description of drawings
Fig. 1 is the structural representation of the equipment of the utility model preparation aqueous solution of nitric acid.
The specific embodiment
As shown in Figure 1; The utility model comprises air blast 1, gas-liquid separator 2, sour preparing tank 3, acid circulating pump 4, diluted acid holding vessel 5, diluted acid circulating pump 6 and injector 7; Acid preparing tank 3 is respectively equipped with first, second cooling water pipe (37,51) with diluted acid holding vessel 5 bottoms; The liquid inlet 32 that offer air intake 31 at sour preparing tank 3 tops, is used to dilute, treat diluent liquid inlet 2 (33,33 '), gas vent 34 and sour loop heads 35; Acid preparing tank 3 bottoms offer sour loop exit 36, and it is the dilute nitric acid solution of 3-5% that the liquid inlet 32 that is used to dilute feeds concentration, treat that it is that 98% red fuming nitric acid (RFNA) and concentration are 60% salpeter solution that diluent liquid inlet 33,33 ' feeds concentration respectively; Wherein: air blast 1 outlet links to each other with the gas-liquid mixture inlet of gas-liquid separator 2; The gas vent of gas-liquid separator 2 links to each other with the air intake 31 of sour preparing tank 3, in the outside of sour preparing tank, is connected with acid circulating pump 4 between sour loop exit 36 and the sour loop head 35; The gas vent 34 of acid preparing tank 3 is taken out the medium inlet with the quilt of injector 7 and is linked to each other; The outlet of injector 7 links to each other with diluted acid holding vessel 5 inlets, and 5 outlets of diluted acid holding vessel link to each other with diluted acid circulating pump 6 inlets, and 6 outlets of diluted acid circulating pump link to each other with injector 7 working medias inlet.
Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technical scheme of the utility model all should fall in the definite protection domain of the utility model claims.
Claims (6)
1. equipment of preparing aqueous solution of nitric acid; It is characterized in that: comprise air blast (1), gas-liquid separator (2), sour preparing tank (3), diluted acid holding vessel (5), diluted acid circulating pump (6) and injector (7); Acid preparing tank (3) offers air intake (31), the liquid inlet (32) that is used to dilute, treat diluent liquid inlet (33) and gas vent (34); Wherein: air intake (31), the liquid inlet (32) that is used to dilute, treat that diluent liquid inlet (33) and gas vent (34) all are positioned at apart from the tank body more than the 2/3 tank body height of sour preparing tank bottom; Air blast (1) outlet links to each other with the gas-liquid mixture inlet of gas-liquid separator (2); The gas vent of gas-liquid separator (2) links to each other with the air intake (31) of sour preparing tank (3); The gas vent (34) of acid preparing tank (3) is taken out the medium inlet with the quilt of injector (7) and is linked to each other; The outlet of injector (7) links to each other with diluted acid holding vessel (5) inlet, and diluted acid holding vessel (5) outlet links to each other with diluted acid circulating pump (6) inlet, and diluted acid circulating pump (6) outlet links to each other with injector (7) working media inlet.
2. the equipment of preparation aqueous solution of nitric acid according to claim 1 is characterized in that: the said liquid inlet that is used to dilute (32) has 1-2, and the said diluent liquid inlet (33) of treating has 1-2.
3. the equipment of preparation aqueous solution of nitric acid according to claim 1; It is characterized in that: said sour preparing tank (3) also offers sour loop head (35) on its tank body more than 2/3 tank body height of bottom; Acid preparing tank (3) offers sour loop exit (36) on its tank body below 1/3 tank body height of bottom; In the outside of sour preparing tank, be connected with acid circulating pump (4) between sour loop exit (36) and the sour loop head (35).
4. the equipment of preparation aqueous solution of nitric acid according to claim 1 and 2 is characterized in that: said air intake (31), the liquid inlet (32) that is used to dilute, treat that diluent liquid inlet (33) and gas vent (34) all are positioned at sour preparing tank (3) top.
5. the equipment of preparation aqueous solution of nitric acid according to claim 3 is characterized in that: said sour loop head (35) is positioned at sour preparing tank (3) top, and sour loop exit (36) is positioned at sour preparing tank (3) bottom.
6. the equipment of preparation aqueous solution of nitric acid according to claim 5 is characterized in that: the inside of said sour preparing tank (3) is equipped with first cooling water pipe (37) apart from it below the 1/3 tank body height of bottom; The inside of said diluted acid holding vessel (5) is equipped with second cooling water pipe (51) apart from it below the 1/3 tank body height of bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220021025.6U CN202478859U (en) | 2012-01-17 | 2012-01-17 | Nitric acid solution preparation unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220021025.6U CN202478859U (en) | 2012-01-17 | 2012-01-17 | Nitric acid solution preparation unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202478859U true CN202478859U (en) | 2012-10-10 |
Family
ID=46953323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220021025.6U Expired - Fee Related CN202478859U (en) | 2012-01-17 | 2012-01-17 | Nitric acid solution preparation unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202478859U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580591A (en) * | 2012-01-17 | 2012-07-18 | 安徽淮化股份有限公司 | Equipment for preparing nitric acid aqueous solution |
-
2012
- 2012-01-17 CN CN201220021025.6U patent/CN202478859U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102580591A (en) * | 2012-01-17 | 2012-07-18 | 安徽淮化股份有限公司 | Equipment 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: 20121010 Termination date: 20160117 |
|
| EXPY | Termination of patent right or utility model |