CN107400244A - A kind of environment-friendly production process of nitric fulvic acid potassium - Google Patents
A kind of environment-friendly production process of nitric fulvic acid potassium Download PDFInfo
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- CN107400244A CN107400244A CN201710656923.6A CN201710656923A CN107400244A CN 107400244 A CN107400244 A CN 107400244A CN 201710656923 A CN201710656923 A CN 201710656923A CN 107400244 A CN107400244 A CN 107400244A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08H—DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS
- C08H6/00—Macromolecular compounds derived from lignin, e.g. tannins, humic acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/38—Removing components of undefined structure
- B01D53/40—Acidic components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/73—After-treatment of removed components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/77—Liquid phase processes
- B01D53/78—Liquid phase processes with gas-liquid contact
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05C—NITROGENOUS FERTILISERS
- C05C11/00—Other nitrogenous fertilisers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
Abstract
The invention belongs to humic acid technical field, and in particular to a kind of environment-friendly production process of nitric fulvic acid potassium；Concrete technical scheme is：A kind of environment-friendly production process of nitric fulvic acid potassium, preparation technology comprise the following steps：First, mixed acid is configured, nitric acid reacts 2 24h with humic acid under static condition；2nd, first-stage centrifugal；3rd, two-stage centrifugal；4th, alkalize, potassium fulvate is made；5th, purify；6th, slurry-spraying pelletizing；Tobacco handling process in production process：7th, one-level sprays；8th, two level sprays；9th, flue gas cleans；Tenth, vent gas treatment；After tobacco vent gas treatment, any harmful substance is free of in the tail gas of discharge, comprised only in the tail gas of discharge with Atmospheric components identical nitrogen, oxygen and vapor, will not both cause the pollution of air, the waste of resource will not be caused again, meet the requirement of green production.
Description
Technical field
The invention belongs to humic acid technical field, and in particular to a kind of environment-friendly production process of nitric fulvic acid potassium.
Background technology
Nitric fulvic acid has governance role to salt affected soil, and improvement of the nitric fulvic acid potassium to acid soil has reparation to make
With at present, all promotion " weight losing type " production, nitric fulvic acid potassium can reduce the use of chemical fertilizer in agricultural production, and nitro is yellow rotten
Development of the sour potassium to the future of agriculture plays the role of very important.But in current nitric fulvic acid potassium production process, easily
Acid tobacco is produced, traditional tobacco directly pollutes, just by being discharged into after simply filtering in air to air
It is because the tobacco in production process cannot be handled, causes nitric fulvic acid potassium to be difficult to industrially realize large-scale production,
Seriously constrain the development of whole nitric fulvic acid potassium industry.Also some small factories add potassium fulvate next life in potassium nitrate
Nitric fulvic acid potassium is produced, perfect nitric fulvic acid potassium finished product can not be made in this physical production method, it is difficult to chemistry
Nitric fulvic acid potassium matches in excellence or beauty made from reaction method.
The content of the invention
To solve technical problem existing for prior art, the invention provides a kind of production of the nitric fulvic acid potassium of environment-friendly type
Technique, can be made the high nitric fulvic acid potassium of purity, and and can carries out cleaning treatment, tobacco to caused tobacco in production process
After treatment, it is drained into after generating the nitrogen, oxygen and vapor of cleaning in air, ensures that discharge waste gas will not be made to air
Into pollution, and can reclaims to the acidic materials in tobacco.
To achieve the above object, the technical solution adopted in the present invention is：A kind of environmental protection production work of nitric fulvic acid potassium
Skill, preparation technology comprise the following steps：
Step 1: configuration mixed acid：The raw material containing humic acid is added in salpeter solution, pure humic acid can be selected in raw material
Solid, turf also can be selected, or be peat, no matter which kind of raw material, nitric acid accounts for the 15%-60% of nitric acid and humic acid gross weight,
Humic acid accounts for the 40%-85% of nitric acid and humic acid gross weight.Stand reaction 15-24h.
Step 2: first-stage centrifugal：Contain some unreacted solid matters and impurity in reacted mixed liquor, after reaction
Mixed liquor first-stage centrifugal is carried out by horizontal screw centrifuge, heavier solid formation forms sediment layer, conveying spiral on rotatory drum wall
The solid formation of deposition is continuously pushed into rotary drum tapered end, through slag-drip opening discharge machine outside, lighter liquid phase thing formed internal layer liquid
Ring, rotary drum is continuously overflowed by the big end overfall of rotary drum, continuously overflows rotary drum through leakage fluid dram, through leakage fluid dram discharge machine outside, realize solid
Liquid separates.After first-stage centrifugal, material not soluble in water is discharged in mixed liquor, realizes the by-pass filtration of mixed liquor.
Step 3: two-stage centrifugal：Also contain some solid impurities in mixed liquor after first-stage centrifugal, after first-stage centrifugal
Mixed liquor is passed into disk plate centrifuge and carries out two-stage centrifugal, and the solid impurity not soluble in water in mixed liquor after two-stage centrifugal enters
One step is discharged, and realizes the secondary filtration of mixed liquor.
Step 4: alkalization：Mixed liquor is carried out after filtering twice, the purity of mixed liquor is very high, disclosure satisfy that neutralization reaction
Requirement.Potassium hydroxide solution/solution of potassium carbonate is added into the mixed liquor after two-stage centrifugal, the time control of alkalization is in 60-
Between 180min, after neutralization reaction, the pH value of solution is adjusted to 7-10.
Step 5: purification：A small amount of solid impurity can also be contained in solution after alkalization, therefore, by the solution after alkalization
Purity lifting is carried out by filter press, insoluble matter is taken away by filter press, and the high mixed liquor of purity is sent in drying plant.
Step 6: slurry-spraying pelletizing：Solution after heating purification, adds when the water quality accounting in solution is 30%-50%
Enter urea or ammonium nitrate, when solution temperature reaches 110 DEG C -140 DEG C, now, the quality of urea or ammonium nitrate in mixed solution accounts for
Than for 10%-30%, slurry-spraying pelletizing, obtaining rounded grain, this technical process can reduce heat consumption energy, shorten prilling and take, particle
Using more convenient in agricultural production process.
During nitric fulvic acid potassium produces, the tobacco of acidity can be produced, the handling process of tobacco is as follows：
Step 7: one-level sprays：Caused tobacco is sent into by one-level air blower in nitric fulvic acid potassium generating process
To the one-level Lower Hold of one-level spray tower bottom housing hydrogen sodium hydroxide solution, during continuous production, sodium hydroxide solution holds
Chamber of receiving is that one-level Lower Hold supplements sodium hydroxide solution.Sour gas and sodium hydroxide solution neutralization reaction in tobacco, are reduced yellow
Content of acid gas in cigarette, the mixed liquor after neutralization reaction are delivered to vaporising device, by controlling the temperature of vaporising device, analysis
Go out different crystalline solid.
Tobacco continues to rise after neutralizing by the sodium hydroxide solution of one-level Lower Hold, and tobacco passes sequentially through during rising
First level filtering device, first level filtering device include being placed in the stainless (steel) wire of top, stainless steel double-edged fine-toothed comb placed below, are filled in not
The Pall ring to become rusty between steel mesh and stainless steel double-edged fine-toothed comb, stainless steel Pall ring are placed in the middle part of one-level spray column, it is possible to increase one-level
The tower pressure interior force of spray column, meanwhile, stainless steel Pall ring is small to the resistance of uprising gas, and gas velocity is fast, does not interfere with normal production.
Meanwhile the one-level spray equipment sprinkling sodium hydroxide solution spraying for being placed in top neutralizes to the acidic materials in tobacco, one-level bottom
Storehouse continuously supplies sodium hydroxide solution into one-level spray equipment by primary cycle pump, ensures consecutive production.
Step 8: two level sprays：Flue gas after one-level spray column is sent to two level spray column by two level air blower
Bottom accommodates the two level Lower Hold of sodium hydroxide solution, and during continuous production, sodium hydroxide solution accommodating chamber is two level bottom
Sodium hydroxide solution is supplemented in storehouse, the sour gas in flue gas carries out two level neutralization reaction with sodium hydroxide solution, further drop
Content of acid gas in low flue gas.
Flue gas continues to rise after the sodium hydroxide solution by two level Lower Hold, and flue gas passes sequentially through two level during rising
Filter, two-stage filter include being placed in the stainless (steel) wire of top, stainless steel double-edged fine-toothed comb placed below, are filled in stainless steel
Pall ring between net and stainless steel double-edged fine-toothed comb, stainless steel Pall ring are placed in the middle part of two level spray column, it is possible to increase two level sprays
The tower pressure interior force of tower, meanwhile, stainless steel Pall ring is small to the resistance of uprising gas, and gas velocity is fast, does not interfere with normal production.Together
When, the two level spray equipment sprinkling sodium hydroxide solution spraying for being placed in top neutralizes to the acidic materials in flue gas, two level Lower Hold
Sodium hydroxide solution is continuously supplied into two level spray equipment by secondary cycle pump, ensures consecutive production.
, can also be according to increase multi-stage spray tower be actually needed, to increase cleaning efficiency after step 8.
Step 9: flue gas cleans：Flue gas after two level spray column is sent to cleaning tower bottom by three-level air blower
The three-level Lower Hold of softened water is accommodated, flue gas continues to rise after the softened water by three-level Lower Hold, cleans the cleaning spray dress in tower
Put sprinkling softening water spray.Both sides foam removal net radially is provided with cleaning tower, the thickness of every layer of foam removal net is 5cm, and flue gas passes through
Foam removal after foam removal net.
Step 10: vent gas treatment：The nitric oxide in tail gas, nitrogen dioxide after cleaning by after heating with ammonia
Reaction generation oxygen, nitrogen and water (needing to convert reducing catalyst by low temperature ammonia in course of reaction), oxygen and nitrogen discharge, oxygen
Gas and nitrogen are the chief components of air, and air will not be polluted.In addition, the water of reaction generation is collected,
Or discharged in the form of vapor.
One-level spray equipment is made up of multiple one-level atomizing spray heads, and multiple one-level atomizing spray heads are fixed on one-level spray
The top of tower, the ejection end of multiple one-level atomizing spray heads arrange down, the water smoke and rising that one-level atomizing spray head ejects
Flue gas formed liquidate, be advantageous to the alkali substance reaction in the acidic materials and water smoke in flue gas.
Two level spray equipment is made up of multiple two level atomizing spray heads, and multiple two level atomizing spray heads are fixed on two level spray
The top of tower, the ejection end of multiple two level atomizing spray heads arrange down, the water smoke and rising that two level atomizing spray head ejects
Flue gas formed liquidate, be advantageous to the alkali substance reaction in the acidic materials and water smoke in flue gas.
Cleaning spray device is made up of multiple cleaning atomizing spray heads, and multiple cleaning atomizing spray heads are fixed on by support
Clean the inside of tower, the ejection ends of multiple cleaning atomizing spray heads are arranged down, the water smoke that ejects of cleaning atomizing spray head with
The flue gas of rising is formed and liquidated, and the impurity be advantageous in flue gas contacts sinking with water smoke.
The concentration of potassium hydroxide solution/solution of potassium carbonate is controlled in 20%-40%.
Wherein, it is different from two kinds of different alkaline solutions of potassium hydroxide solution/solution of potassium carbonate, the crystalloid fluid of precipitation.
Heating and temperature control in step 10 is at 150 DEG C -200 DEG C.
Wherein, as preferable, stainless (steel) wire is 30mm × 30mm grid.
Equally, also potassium hydroxide solution/solution of potassium carbonate in step 4 can be replaced with sodium hydroxide solution/sodium carbonate
Solution, the preparation of nitro-fulvate can be equally completed, still, obtained auxiliary product is nitro humus acid sodium.
The present invention realizes the environment-friendly production process of nitric fulvic acid potassium, first, the obtained anti-wadding of nitric fulvic acid potassium
It is solidifying, it is good to the improved effect of salt affected soil.In addition, handling caused tobacco in nitric fulvic acid potassium production process, locate
Any harmful substance is free of in tail gas after reason, is comprised only in the tail gas of discharge and Atmospheric components identical nitrogen, oxygen and water
Steam, the pollution of air will not be both caused, the waste of resource will not be caused again, meet the requirement of green production.
Brief description of the drawings
Fig. 1 is the control flow chart of the present invention.
Fig. 2 is the structural representation of one-level spray column in Fig. 1.
Fig. 3 is the structural representation of two level spray column in Fig. 1.
Fig. 4 is the structural representation that tower is cleaned in Fig. 1.
In figure, 1 is blending tank, and 2 be horizontal screw centrifuge, and 3 be disk plate centrifuge, and 4 be alkalization device, and 5 be filter press, and 6 are
Drying plant, 7 be one-level air blower, and 8 be one-level spray column, and 81 be one-level Lower Hold, and 82 be first level filtering device, and 83 be stainless steel
Net, 84 be Pall ring, and 85 be stainless steel double-edged fine-toothed comb, and 86 be one-level spray equipment, and 87 be primary cycle pump, and 88 be one-level atomizing spray
Head, 9 be sodium hydroxide solution accommodating chamber, and 10 be two level air blower, and 11 be two level spray column, and 111 be two level Lower Hold, and 112 be two
Level filter, 113 be two level spray equipment, and 114 be secondary cycle pump, and 115 be two level atomizing spray head, and 12 be three-level air blast
Machine, 13 be cleaning tower, and 131 be three-level Lower Hold, and 132 be foam removal net, and 133 be cleaning spray device, and 134 be cleaning atomizing spray
Head, 14 be heater, and 15 be small-sized ammonia tank, and 16 be reducing agent tank.
Embodiment
In order that technical problems, technical solutions and advantages to be solved are more clearly understood, tie below
Drawings and Examples are closed, the present invention will be described in further detail.It should be appreciated that specific embodiment described herein is only
To explain the present invention, it is not intended to limit the present invention.
Embodiment one
As Figure 1-4, a kind of environment-friendly production process of nitric fulvic acid potassium, preparation technology comprise the following steps：
Step 1: configuration mixed acid：In blending tank 1, the raw material containing humic acid is added in salpeter solution, raw material is optional
With pure humic acid solid, nitric acid accounts for the 15% of nitric acid and humic acid gross weight, and humic acid accounts for nitric acid and humic acid gross weight
85%, stand reaction 24h.
Step 2: first-stage centrifugal：Contain some unreacted solid matters and impurity in reacted mixed liquor, after reaction
Mixed liquor first-stage centrifugal is carried out by horizontal screw centrifuge 2, heavier solid formation forms sediment layer, conveying spiral on rotatory drum wall
The solid formation of deposition is continuously pushed into rotary drum tapered end, through slag-drip opening discharge machine outside, lighter liquid phase thing formed internal layer liquid
Ring, rotary drum is continuously overflowed by the big end overfall of rotary drum, continuously overflows rotary drum through leakage fluid dram, through leakage fluid dram discharge machine outside, realize solid
Liquid separates.After first-stage centrifugal, material not soluble in water is discharged in mixed liquor, realizes the by-pass filtration of mixed liquor.
Step 3: two-stage centrifugal：Also contain some solid impurities in mixed liquor after first-stage centrifugal, after first-stage centrifugal
Mixed liquor is passed into disk plate centrifuge 3 and carries out two-stage centrifugal, the solid impurity not soluble in water in mixed liquor after two-stage centrifugal
Further discharge, realize the secondary filtration of mixed liquor.
Step 4: alkalization：Mixed liquor is carried out after filtering twice, the purity of mixed liquor is very high, disclosure satisfy that neutralization reaction
Requirement.In the device 4 that alkalizes, add potassium hydroxide solution into the mixed liquor after two-stage centrifugal, potassium hydroxide solution it is dense
20%, alkalization time is controlled between 20min for degree control, after neutralization reaction, adjusts the pH value of solution to 7.
Step 5: purification：A small amount of solid impurity can also be contained in solution after alkalization, therefore, by the solution after alkalization
Purity lifting is carried out by filter press 5, insoluble matter is taken away by filter press 5, and the high mixed liquor of purity is sent to drying plant 6
In.
Step 6: slurry-spraying pelletizing：Solution after heating purification, adds when the water quality accounting in solution is 30%-50%
Enter urea or ammonium nitrate, when solution temperature reaches 110 DEG C -140 DEG C, now, the quality of urea or ammonium nitrate in mixed solution accounts for
Than for 10%-30%, slurry-spraying pelletizing, obtaining rounded grain, this technical process can reduce heat consumption energy, shorten prilling and take, particle
Using more convenient in agricultural production process.
During nitric fulvic acid potassium produces, the tobacco of acidity can be produced, the handling process of tobacco is as follows：
Step 7: one-level sprays：Caused tobacco is sent into by one-level air blower 7 in nitric fulvic acid potassium generating process
The one-level Lower Hold 81 of sodium hydroxide solution, during continuous production, sodium hydroxide solution are accommodated to the bottom of one-level spray column 8
Accommodating chamber 9 is that one-level Lower Hold 81 supplements sodium hydroxide solution.Sour gas and sodium hydroxide solution neutralization reaction in tobacco, drop
Content of acid gas in low tobacco.When the sodium hydroxide in the reacted mixed liquor of neutralization is less than 6g/L, mixed liquor conveying
To vaporising device, by controlling the temperature of vaporising device, different crystalline solid is separated out.
Tobacco continues to rise after neutralizing by the sodium hydroxide solution of one-level Lower Hold 81, and tobacco leads to successively during rising
First level filtering device 82 is crossed, first level filtering device 82 includes being placed in the stainless (steel) wire 83 of top, stainless steel double-edged fine-toothed comb placed below
85th, the Pall ring 84 being filled between stainless (steel) wire 83 and stainless steel double-edged fine-toothed comb 85, stainless steel Pall ring 84 are placed in one-level spray column 8
Middle part, it is possible to increase the tower pressure interior force of one-level spray column 8, meanwhile, stainless steel Pall ring 84 is small to the resistance of uprising gas, gas
It is fast fast, do not interfere with normal production.Meanwhile the one-level spray equipment 86 for being placed in top sprays sodium hydroxide solution and sprayed to tobacco
Interior acidic materials neutralize, and one-level Lower Hold 81 continuously supplies hydrogen by primary cycle pump 87 into one-level spray equipment 86
Sodium hydroxide solution, ensure consecutive production.
Step 8: two level sprays：Flue gas after one-level spray column 8 is sent to two level by two level air blower 10 and sprayed
The bottom of tower 11 accommodates the two level Lower Hold 111 of sodium hydroxide solution, during continuous production, sodium hydroxide solution accommodating chamber 9
For supplement sodium hydroxide solution in two level Lower Hold 111, sour gas in flue gas and sodium hydroxide solution are carried out in two level and instead
Should, another level reduces the content of acid gas in flue gas.
Flue gas continues to rise after the sodium hydroxide solution by two level Lower Hold 111, and flue gas passes sequentially through during rising
Two-stage filter 112, two-stage filter 112 include being placed in the stainless (steel) wire 83 of top, stainless steel double-edged fine-toothed comb placed below
85th, the Pall ring 84 being filled between stainless (steel) wire 83 and stainless steel double-edged fine-toothed comb 85, stainless steel Pall ring 84 are placed in two level spray column
11 middle part, it is possible to increase the tower pressure interior force of two level spray column 11, meanwhile, resistance of the stainless steel Pall ring 84 to uprising gas
Small, gas velocity is fast, does not interfere with normal production.Meanwhile the two level spray equipment 113 for being placed in top sprays sodium hydroxide solution spraying
Acidic materials in flue gas are neutralized, two level Lower Hold 111 by secondary cycle pump 114 into two level spray equipment 113 it is continuous not
Sodium hydroxide solution is supplied disconnectedly, ensures consecutive production.
, can also be according to increase multi-stage spray tower be actually needed, to increase cleaning efficiency after step 8.
Step 9: flue gas cleans：Flue gas after two level spray column 11 is sent to cleaning tower by three-level air blower 12
13 bottoms accommodate the three-level Lower Hold 131 of softened water, and flue gas continues to rise after the softened water by three-level Lower Hold 131, clean tower 13
The interior sprinkling softening water spray of cleaning spray device 133.Radially both sides foam removal net 132, every layer of foam removal are provided with cleaning tower 13
The thickness of net 132 is 5cm, and flue gas passes through foam removal after foam removal net 132.
Step 10: vent gas treatment：The nitric oxide in tail gas, nitrogen dioxide after cleaning are added by heater 14
Heat, small-sized ammonia tank 15 to nitric oxide, nitrogen dioxide mixed gas in supply ammonia, nitric oxide, nitrogen dioxide and ammonia
The mixed gas of gas carries out reduction reaction, reaction in reducing agent tank 16 (converting reducing catalyst by low temperature ammonia in course of reaction)
Temperature control is at 150 DEG C, oxygen and nitrogen discharge, and oxygen and nitrogen are the chief components of air, and air will not be caused
Pollution.In addition, being collected to the water of reaction generation, or discharged in the form of vapor.
One-level spray equipment 86 is made up of multiple one-level atomizing sprays first 88, and multiple one-level atomizing sprays first 88 are fixed on one
The top of level spray column 8, the ejection end of multiple one-level atomizing sprays first 88 arranges down, what one-level atomizing spray first 88 ejected
Water smoke is formed with the flue gas risen and liquidated, and is advantageous to the alkali substance reaction in the acidic materials and water smoke in flue gas.
Two level spray equipment 113 is made up of multiple two level atomizing sprays first 15, and multiple two level atomizing sprays first 15 are fixed on
The top of two level spray column 11, the ejection end of multiple two level atomizing sprays first 15 arrange that two level atomizing spray first 15 sprays down
The water smoke gone out is formed with the flue gas risen and liquidated, and is advantageous to the alkali substance reaction in the acidic materials and water smoke in flue gas.
Cleaning spray device 133 is made up of multiple cleaning atomizing sprays first 134, and multiple cleaning atomizing sprays first 134 pass through
Support is fixed on the inside of cleaning tower 13, and the ejection end of multiple cleaning atomizing sprays first 134 is arranged down, cleans atomizing spray head
134 water smokes ejected are formed with the flue gas risen and liquidated, and the impurity be advantageous in flue gas contacts sinking with water smoke.
Wherein, it is preferred that alkaline solution is sodium hydroxide solution, by the control of different evaporating temperatures, separate out Asia receive and
Nitre sodium.
Stainless (steel) wire 83 is 30mm × 30mm grid.
Embodiment two
The present embodiment and the difference of embodiment one are：
In step 1, nitric acid accounts for the 60% of nitric acid and humic acid gross weight, and the raw material of selection is turf, humic acid in turf
Weight accounts for nitric acid and humic acid gross weight 40%, and the standing reaction time is 15h.
In step 4, solution of potassium carbonate is added into the mixed liquor after two-stage centrifugal, the concentration of solution of potassium carbonate is 40%,
The time of alkalization is 180min, after neutralization reaction, adjusts the pH value of solution to 10.
In step 10, reaction temperature is 200 DEG C.
Embodiment three
The present embodiment and the difference of embodiment one are：
In step 1, nitric acid accounts for the 30% of nitric acid and humic acid gross weight, and the raw material of selection is peat, humic acid in peat
Weight accounts for the 70% of nitric acid and humic acid gross weight, and the standing reaction time is 20h.
In step 4, potassium hydroxide solution is added into the mixed liquor after two-stage centrifugal, the concentration of potassium hydroxide solution is
25%, the time of alkalization is 120min, after neutralization reaction, adjusts the pH value of solution to 8.
In step 10, reaction temperature is 180 DEG C.
Example IV
The present embodiment and the difference of embodiment one are：
In step 1, nitric acid accounts for the 40% of nitric acid and humic acid gross weight, and the raw material of selection is pure humic acid solid, pure corruption
The weight for growing sour solid accounts for the 60% of total mixed liquor weight, and the standing reaction time is 22h.
In step 4, solution of potassium carbonate is added into the mixed liquor after two-stage centrifugal, the concentration of solution of potassium carbonate is 30%,
The time of alkalization is 80min, after neutralization reaction, adjusts the pH value of solution to 9.
In step 10, reaction temperature is 160 DEG C.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., all should be wrapped within the scope of the present invention.
Claims (10)
1. a kind of environment-friendly production process of nitric fulvic acid potassium, preparation technology comprise the following steps：
Step 1: configuration mixed acid：The raw material containing humic acid is added in salpeter solution, stands reaction 15-24h；
Step 2: first-stage centrifugal：Reacted mixed liquor carries out first-stage centrifugal by horizontal screw centrifuge, after first-stage centrifugal, mixing
Material not soluble in water discharge in liquid；
Step 3: two-stage centrifugal：Mixed liquor after first-stage centrifugal carries out two-stage centrifugal by disk plate centrifuge, after two-stage centrifugal,
Material not soluble in water discharge in mixed liquor；
Step 4: alkalization：Into the mixed liquor after two-stage centrifugal add potassium hydroxide solution/solution of potassium carbonate, regulation pH value to
7-10, alkalization time are controlled in 60-180min；
Step 5: purification：Solution after alkalization carries out purity lifting by filter press, and insoluble matter is taken away by filter press；
Step 6: slurry-spraying pelletizing：Solution after heating purification, adds urine when the water quality accounting in solution is 30%-50%
Element, when solution temperature reaches 110 DEG C -140 DEG C, now, quality accounting of the urea in mixed solution is 10%-30%, spray
Slurry is granulated, and obtains rounded grain；
It is characterized in that, further comprising the steps of：
Step 7: one-level sprays：Tobacco after configuration mixed acid is sent to one-level by one-level air blower and sprays tower bottom receiving
In the one-level Lower Hold of sodium hydroxide solution, by continuing to rise after the sodium hydroxide solution in one-level Lower Hold, tobacco rises tobacco
During pass sequentially through multiple first level filtering devices, meanwhile, be placed in top one-level spray equipment sprinkling sodium hydroxide solution
Spray and the acidic materials in tobacco are neutralized；
Step 8: two level sprays：Flue gas after one-level spray column is sent to two level by two level air blower and sprays tower bottom
In the two level Lower Hold for accommodating sodium hydroxide solution, flue gas continues to rise after the sodium hydroxide solution by two level Lower Hold, on flue gas
Multiple two-stage filters are passed sequentially through during rising, meanwhile, the two level spray equipment sprinkling sodium hydroxide for being placed in top is molten
Liquid spraying neutralizes to the acidic materials in flue gas；
Step 9: flue gas cleans：Flue gas after two level spray column is sent to cleaning tower bottom by three-level air blower and accommodated
In the three-level Lower Hold of softened water, flue gas continues to rise after the softened water by three-level Lower Hold, cleans the cleaning spray device in tower
Sprinkling softening water spray, flue gas foam removal in cleaning tower；
Step 10: vent gas treatment：The nitric oxide in tail gas, nitrogen dioxide after cleaning by after heating with ammonia low
Reaction generation oxygen, nitrogen and water under the catalytic action of warm ammonia conversion reducing catalyst, oxygen and nitrogen discharge, water collect.
2. the environment-friendly production process of a kind of nitric fulvic acid potassium according to claim 1, it is characterised in that described to contain corruption
The raw material for growing acid is pure humic acid solid, or is turf, or is peat.
A kind of 3. environment-friendly production process of nitric fulvic acid potassium according to claim 2, it is characterised in that the one-level spray
Shower device is made up of multiple one-level atomizing spray heads, and multiple one-level atomizing spray heads are fixed on the top of one-level spray column,
The two level spray equipment is made up of multiple two level atomizing spray heads, and multiple two level atomizing spray heads are fixed on two level spray
The top of tower, the cleaning spray device are made up of multiple cleaning atomizing spray heads, and multiple cleaning atomizing spray heads pass through
Support is fixed on the inside of cleaning tower.
A kind of 4. environment-friendly production process of nitric fulvic acid potassium according to claim 3, it is characterised in that in step 1,
Nitric acid accounts for the 15%-60% of nitric acid and humic acid gross weight, and humic acid accounts for the 40%-85% of nitric acid and humic acid gross weight.
A kind of 5. environment-friendly production process of nitric fulvic acid potassium according to claim 4, it is characterised in that the one-level bottom
Sodium hydroxide solution in storehouse is delivered in one-level spray equipment by primary cycle pump, the sodium hydroxide solution in two level Lower Hold
It is delivered to by secondary cycle pump in two level spray equipment.
A kind of 6. environment-friendly production process of nitric fulvic acid potassium according to claim 5, it is characterised in that the one-level mistake
Filter device is identical with the structure of two-stage filter, and the first level filtering device includes being placed in the stainless (steel) wire of top and is placed in down
The stainless steel double-edged fine-toothed comb of side, is filled with Pall ring between stainless (steel) wire and stainless steel double-edged fine-toothed comb.
A kind of 7. environment-friendly production process of nitric fulvic acid potassium according to claim 6, it is characterised in that the hydroxide
The concentration of potassium solution/solution of potassium carbonate is controlled in 20%-40%.
8. the environment-friendly production process of a kind of nitric fulvic acid potassium according to claim 7, it is characterised in that in step 10
Heating and temperature control is at 150 DEG C -200 DEG C.
A kind of 9. environment-friendly production process of nitric fulvic acid potassium according to claim 8, it is characterised in that the one-level bottom
Also it is connected in storehouse by pipeline with vaporising device, by the temperature control to vaporising device, separates out crystal, is separated out molten after crystal
Liquid is back to vaporising device circulation.
A kind of 10. environment-friendly production process of nitric fulvic acid potassium according to claim 9, it is characterised in that the cleaning
Two layers of foam removal net is provided with tower, the thickness of every layer of foam removal net is 5cm.
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