CN101058409A - Method of mixing acid - Google Patents
Method of mixing acid Download PDFInfo
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- CN101058409A CN101058409A CN 200610074588 CN200610074588A CN101058409A CN 101058409 A CN101058409 A CN 101058409A CN 200610074588 CN200610074588 CN 200610074588 CN 200610074588 A CN200610074588 A CN 200610074588A CN 101058409 A CN101058409 A CN 101058409A
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- acid
- pressure
- water
- mixing device
- nitration mixture
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Abstract
The invention discloses an acid mixing method in the dry sucking watering technical course of manufacturing course of sulfuric acid, which comprises the following steps: 1. transmitting pressurized acid liquid into pressure acid spraying mouth of the acid mixer; 2. blending acid and water in the acid mixer cavity; 3. ejecting the composite liquid of acid water through ejecting passage of the acid mixer. The invention saves energy to accelerate composite speed, improve product quality and increase economic benefit, which is easy to maintain and change with low price.
Description
Technical field
The present invention relates to a kind of method of nitration mixture, be applicable to that using acid mixing device to do to inhale in the sulphuric acid process adds the water process.
Background technology
In the relieving haperacidity industry at home, dried desorption system adds water, and dual mode is arranged usually: directly add water and add water by acid mixing device and mix.
It is simple directly to add water mode structure and Process configuration, generally is used for sulphuric acid process, but this to add the problem that the water mode exists more, mainly shows following several respects:
A, add water and concentrate, acid, water mix inhomogeneous, cause local high heat boiling, produce a large amount of acid mists and steam and cause equipment corrosions such as circulation groove lid and groove face adapter;
B, when the recycle acid temperature is too high, to Corrosion of Pipeline aggravation, cause product vitriolic quality instability, the consumption of material accessory increases;
Acid mist that produces in c, the mixing process and steam may cause liquidometer malfunctioning, produce system misoperation;
D, acid mist and steam cause the circulation groove deaeration pipe to be with acid in a large number, improve the material requirement to deaeration pipe greatly;
Liquid level localized hyperthermia and diluted acid cause local corrosion to recycle pump and tubular stinger in e, the groove;
F, filler pipe corrosion-vulnerable, work-ing life is shorter.
At present domesticly developed some acid mixing devices, but the method for nitration mixture and principle are identical substantially, all fundamentally do not solve the etching problem of equipment in the use, result of use is unsatisfactory.
According to the literature survey result, the method for nitration mixture of the present invention has not yet to see report.
Summary of the invention
Add the problem that exists in the water at existing dried desorption system, the present invention looks for another way, utilize the principle of water-jet pump, provide a kind of simple in structure, result of use good, be beneficial to the nitration mixture technological method of maintenance, fundamentally solve dried in the past desorption system and add the problem that exists in the water conservancy project skill.
Purpose of the present invention can realize by following measure:
A kind of method of nitration mixture comprises the steps:
(1), will be with pressing acid solution to send into the pressure acid nozzle of acid mixing device
Under certain operating pressure condition, will press acid solution to send into the pressure acid nozzle a of acid mixing device 1 through water cooler 2 cooled bands, pressure acid nozzle a is up big and down small funnel shaped, material is a material high temperature resistant, erosion resistance.
It is 0.2～1.0MPa that this process power requires, and operating pressure (the work absolute pressure subtracts local normal atmosphere) should be greater than 25mmhg (3.3kPa).Press acid liquor temperature to be controlled at through water cooler 2 cooled bands and be lower than 40-60 ℃.
(2), in the acid mixing device cavity, form " vacuum " and bring water into mixing
Band presses acid solution spouting through excess pressure acid nozzle a, form high-speed jet, flow velocity is by on the acid mixing device inlet acid tube road flow control valve 3 controls being set, form parital vacuum in pressure acid nozzle a exit, cause this partial pressure to be lower than by the pressure of drinking-water pipe water, under the effect of this pressure difference, the water in the water pipe is entered acid mixing device cavity nitration mixture fluidic channel c by injection, and then mixes with acid solution.
(3), acid, water mixed liquid penetrate through the fluidic channel of acid mixing device
Acid, when water mixed liquid enters the fluidic channel c section of acid mixing device 1, be subjected to cushioning the effect of diffusion, jet speed reduces, and pressure increases, and penetrates through fluidic channel d section again, makes the desired concn sulphuric acid soln that mixes.
Because this process jet speed is very fast, and the sour water ratio is big, liberated heat is not enough to water is heated to boiling point in the mixing process, therefore can not generate acid mist, the minute quantity acid mist that generates is also brought in the acid solution by jet flow negative pressure, adds to absorb circulation, can not cause corrosion to adding the pool.
The flow velocity of ingress sulphuric acid soln should be controlled at 0.001-1m when the present invention required to turn round
3/ s, the concentration of sulphuric acid soln to be mixed should be greater than 98.5%, and mixed sulfuric acid concentration requires to be not less than 93%, and all the other sizes of acid mixing device are calculated according to processing condition and are determined.In addition, should avoid under low discharge, working aggravation corrosion in order to avoid fluid temperature raises.
Use beneficial effect of the present invention to be:
(1) the present invention adopts vacuum technique, can save energy and reduce the cost, fast reaction speed, the economic benefit of improving the quality of products, increase.
(2) can finish at short notice owing to the nitration mixture process, mixed acid is discharged from the nitration mixture fluidic channel rapidly, can avoid above-mentioned dried desorption system directly to add water and acid mixing device in the past and add the acid mist that produces in the water and steam, reduce processing cost greatly the etching problem of nitration mixture equipment.
(3) method of use nitration mixture provided by the invention as long as determined the reaction blending ratio, just can be controlled the amount that enters water by the internal diameter of regulating sour flow, flow velocity, pipeline easily.Promptly under the prerequisite of constant rate of acid, water, by regulating the amount of acid, regulate the cavity negative pressure, by the variation of negative pressure, the water yield that indirect adjusting enters guarantees that water is inexcessive, guarantees that temperature and concentration do not have acute variation.Thereby solve the corrosive problem, guaranteed the quality of finished acid.
(4) the acid mixing device overcurrent partly adopts high temperature resistant, erosion resistance material, and all the other not corrosion resistant parts should prevent to be corroded.The material of its flow passage components has: pottery, plain cast iron, high silicon cast iron, stainless steel, high quality steel, titanium and alloy thereof etc.Can increase the service life.
(5) use the acid mixing device of nitration mixture method of the present invention simple in structure, for ease of maintenaince, change.
Description of drawings
Fig. 1 is the acid mixing device structure iron of nitration mixture method of the present invention
Among the figure: a. pressure acid nozzle
B. water jet passage
C. nitration mixture fluidic channel (epimere)
D. nitration mixture fluidic channel (hypomere)
E. acid mixing device outer wall
Fig. 2 is a process flow sheet of the present invention
Among the figure: 1. acid mixing device
2. plate cooler
3. vitriolic acid flux variable valve
4. sulphuric acid soln pipeline
5. water control valve
6. water inlet pipe
Embodiment
Below in conjunction with accompanying drawing invention is further described again:
As shown in Figure 1 and Figure 2, gas volume 120,000 NM
3/ h, wherein content of sulfur dioxide 8.5%, total conversion rate 99.5%, specific absorption 99.99%, 30 ℃ of electrostatic precipitator exit gas temperatures.Make 98.5% concentrated sulfuric acid solution after purifying absorption.
When operating pressure is 101.3kPa, be that 98.5% band presses concentrated sulfuric acid solution (being cooled to 60 ℃ through plate cooler 2) to send into the pressure acid nozzle a of acid mixing device 1 with the speed of 150T/h by sulphuric acid soln pipeline 4 under the adjusting of vitriolic acid flux variable valve 3 with concentration.
Band presses acid solution spouting through excess pressure acid nozzle a, form high-speed jet, flow velocity is by on the acid mixing device inlet acid tube road flow control valve 3 controls being set, form vacuum values in pressure acid nozzle a exit and be-parital vacuum of 4500Pa, cause this partial pressure to be lower than by the pressure of drinking-water pipe water, under the effect of this pressure difference, water pressurized in the water pipe is by injection, water inlet pipe 6, water jet passage b flow through, enter the nitration mixture fluidic channel c section of acid mixing device 1, discharge is 5T/h, and then mixes with acid solution.
Flow velocity is that 98.5% concentrated sulfuric acid solution of 150T/h and current mixed solution that flow velocity is 5T/h are when entering the fluidic channel c section of acid mixing device 1, be subjected to cushioning the effect of diffusion, jet speed reduces, pressure increases, penetrate through fluidic channel d section again, mixed acid concentration is 95.3%, and temperature out is 92.5 ℃, makes the sulphuric acid soln that mixes.
Because this process jet speed is very fast, and the sour water ratio is very big, liberated heat is not enough to water is heated to boiling point in the mixing process, therefore can not generate acid mist, the minute quantity acid mist that generates is also brought in the acid solution by jet flow negative pressure, adds to absorb circulation, can not cause corrosion to adding the pool.
Should avoid under low discharge, working aggravation corrosion during operation in order to avoid fluid temperature raises.
It is that 100-120 ℃ cast steel material is made that flow passage components are selected anti-concentrated acid temperature for use.
Claims (2)
1, a kind of method of nitration mixture is characterized in that carrying out according to the following steps:
Concentrated sulfuric acid solution is cooled to 40-60 ℃ through water cooler, sends into the pressure acid nozzle of acid mixing device under certain pressure; Band presses acid solution spouting through excess pressure acid nozzle, form high-speed jet, flow velocity is by on the acid mixing device inlet acid tube road Flux Valve Control being set, form parital vacuum in pressure acid nozzle exit, cause this partial pressure to be lower than by the pressure of drinking-water pipe water, under the effect of this pressure difference, the water in the water pipe is entered acid mixing device cavity nitration mixture fluidic channel epimere by injection, mixes with acid solution; Acid, when water mixed liquid enters the fluidic channel epimere of acid mixing device, be subjected to cushioning the effect of diffusion, jet speed reduces, and pressure increases, and penetrates through the fluidic channel hypomere again, makes sulfuric acid and water thorough mixing to make the desired concn sulphuric acid soln that mixes.
2, the method for a kind of nitration mixture according to claim 1, the flow velocity of ingress sulphuric acid soln should be controlled at 0.001-1m when it is characterized in that turning round
3/ s, the concentration of sulphuric acid soln to be mixed should be greater than 98.5%, and mixed sulfuric acid concentration requires to be not less than 93%, and it is 0.2～1.0MPa that power requires, and operating pressure (the work absolute pressure subtracts local normal atmosphere) should be greater than 25mmhg (3.3kPa).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610074588 CN101058409A (en) | 2006-04-20 | 2006-04-20 | Method of mixing acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610074588 CN101058409A (en) | 2006-04-20 | 2006-04-20 | Method of mixing acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101058409A true CN101058409A (en) | 2007-10-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610074588 Pending CN101058409A (en) | 2006-04-20 | 2006-04-20 | Method of mixing acid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102205211A (en) * | 2011-05-26 | 2011-10-05 | 江苏科技大学 | Two-phase liquid mixing device |
| CN101576097B (en) * | 2009-05-31 | 2012-07-11 | 中国纺织工业设计院 | Method and system for pumping and processing tail gas of polyester device by jet ejector |
| CN102580592A (en) * | 2012-02-24 | 2012-07-18 | 宝山钢铁股份有限公司 | Emulsion preparation system and method |
-
2006
- 2006-04-20 CN CN 200610074588 patent/CN101058409A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101576097B (en) * | 2009-05-31 | 2012-07-11 | 中国纺织工业设计院 | Method and system for pumping and processing tail gas of polyester device by jet ejector |
| CN102205211A (en) * | 2011-05-26 | 2011-10-05 | 江苏科技大学 | Two-phase liquid mixing device |
| CN102580592A (en) * | 2012-02-24 | 2012-07-18 | 宝山钢铁股份有限公司 | Emulsion preparation system and method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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