CN108862211A - Diluted acid upgrading system and its production technology - Google Patents
Diluted acid upgrading system and its production technology Download PDFInfo
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- CN108862211A CN108862211A CN201810832595.5A CN201810832595A CN108862211A CN 108862211 A CN108862211 A CN 108862211A CN 201810832595 A CN201810832595 A CN 201810832595A CN 108862211 A CN108862211 A CN 108862211A
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- Prior art keywords
- gas
- sulfuric acid
- flue gas
- acid
- temperature
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B17/00—Sulfur; Compounds thereof
- C01B17/69—Sulfur trioxide; Sulfuric acid
- C01B17/88—Concentration of sulfuric acid
Abstract
The invention discloses a kind of diluted acid upgrading system and its production technology, which includes equipment for gasification, gas-solid separator, heat exchanger, condenser, and diluted acid upgrading system is in concentrate diluted acid, it is necessary first to dilute sulfuric acid gasify in equipment for gasification, resolve into SO3And water, a large amount of dust can be carried secretly while decomposing dilute sulfuric acid, then uses gas-solid separator, and the dust being filtered to remove in flue gas is removed chalk dust removing and then reduced the temperature of flue gas using heat exchanger, finally within the condenser by the SO in flue gas3Congeal into acid with water cooling, then by extra moisture it is purified after be discharged into atmosphere.In conclusion the present invention by sulfuric acid decomposition at sulfur trioxide and water, sulfuric acid is synthesized after dedusting again, simplifies production stage, improves production efficiency, reduces production cost, improves economic benefit.
Description
Technical field
The present invention relates to a kind of Chemical Engineering Technologies, more particularly to a kind of diluted acid upgrading system and its production technology.
Background technique
Currently, generating the largely dilute sulfuric acid containing impurity in domestic chemical production process and entering environment.This is not only in resource
On cause a large amount of waste, huge destruction also is constituted to environment, since dilute sulfuric acid acid concentration is not high, is mentioned both at home and abroad at present
Dense there are two types of technologies, first is that distillation, this can not be such that the impurity in dilute sulfuric acid completely removes, second is that cracking, cracks acid-making process
It needs to consume a large amount of fuel, sulfur waste acid cleavage can be made to the product sulfuric acid of commerical grade.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of diluted acid upgrading system and its production technology, the present invention are dilute
Sulfuric acid decomposition at sulfur trioxide and water, is synthesized sulfuric acid by sour upgrading system and its production technology again after dedusting, simplify production step
Suddenly, production efficiency is improved, production cost is reduced, improves economic benefit.
The present invention is to solve above-mentioned technical problem by following technical proposals：A kind of diluted acid upgrading system, feature
It is comprising equipment for gasification, gas-solid separator, heat exchanger, condenser, diluted acid upgrading system need first in concentrate diluted acid
Dilute sulfuric acid to be gasified in equipment for gasification, resolve into SO3 and water, a large amount of dust can be carried secretly while decomposing dilute sulfuric acid, so
Gas-solid separator is used afterwards, and the dust being filtered to remove in flue gas is removed chalk dust removing and then reduced the temperature of flue gas using heat exchanger
Degree, finally within the condenser by flue gas SO3 and water cooling congeal into acid, then by extra moisture it is purified after be discharged into atmosphere.
Preferably, the gas-solid separator is metal or ceramic filter.
Preferably, the equipment for gasification, gas-solid separator, heat exchanger, condenser are sequentially connected.
The present invention also provides a kind of production technologies of diluted acid upgrading system, which is characterized in that it includes the following steps：
High-temperature flue gas is made by burner first in step 1, then by the dilute sulfuric acid heating and gasifying containing impurity, gasification temperature is wanted
The all liq in dilute sulfuric acid can be made all to gasify, while again lower than the temperature for making SO3 resolve into SO2 and O2, sulfuric acid is adding
Water and sulfur trioxide can be generated under conditions of heat, because it is danger close that sulfur trioxide, which enters human body, in purification dilute sulfuric acid
When need first to carry out corresponding safe handling work, to guarantee the safety of operator；
Step 2 will become solid dust when impurity is high-temperature cracked into gas in dilute sulfuric acid, thus carry out next step it
Before, necessity will first carry out dust removal process, can be by gas and dust separation by gas-solid separator to guarantee the degree of purity of gas
Out；
Step 3 needs to carry out cooling work after completing dust removal process, it is necessary first to using heat exchanger by the temperature of flue gas
It is reduced to condenser acceptable temperature, after cooling, then flue gas is put into condenser and further decreases temperature, be eventually made
Concentration is 98% concentrated sulfuric acid；
Step 4, micro SO2 is oxidized to SO3 in flue gas, needs to remove the acid mist in flue gas using demister, then again will
Extra moisture is discharged into atmosphere；
Step 5 finally needs to carry out exhaust gas treatment, guarantees exhaust gas qualified discharge, and whole process is generated without waste water, waste residue,
So without the processing work for carrying out waste water, waste residue.
Preferably, the gas-solid separator in the step 2 is one or more.
Preferably, the step 4 is the combination of more heat exchangers and condenser.
The positive effect of the present invention is that：Diluted acid upgrading system and its production technology diluted acid upgrading system of the present invention and
Sulfuric acid decomposition at sulfur trioxide and water, is synthesized sulfuric acid by its production technology again after dedusting, simplify production stage, improves production
Efficiency reduces production cost, improves economic benefit.
Detailed description of the invention
Fig. 1 is system diagram of the invention.
Specific embodiment
Present pre-ferred embodiments are provided with reference to the accompanying drawing, in order to explain the technical scheme of the invention in detail.
As shown in Figure 1, diluted acid upgrading system of the present invention includes equipment for gasification, gas-solid separator, heat exchanger, condenser, it is dilute
Sour upgrading system is in concentrate diluted acid, it is necessary first to dilute sulfuric acid gasify in equipment for gasification, resolve into SO3（Sulfur trioxide）With
Water can carry a large amount of dust secretly while decomposing dilute sulfuric acid, then using gas-solid separator, the dust being filtered to remove in flue gas,
It removes chalk dust removing and then reduces the temperature of flue gas using heat exchanger, finally within the condenser by the SO3 and water condensation in flue gas
At acid, then by extra moisture it is purified after be discharged into atmosphere.
Gas-solid separator is metal or ceramic filter, in this way can completely remove the dust in gas, is improved dense dilute
The degree of purity of acid.
Equipment for gasification, gas-solid separator, heat exchanger, condenser are sequentially connected.
Diluted acid extracting and concentrating technology of the present invention includes the following steps：
High-temperature flue gas is made by burner first in step 1, then by the dilute sulfuric acid heating and gasifying containing impurity, gasification temperature is wanted
The all liq in dilute sulfuric acid can be made all to gasify, while be lower than makes SO3 resolve into SO2 again（Sulfur dioxide）And O2（Oxygen）
Temperature, sulfuric acid can generate water and sulfur trioxide under heating conditions because it is danger close that sulfur trioxide, which enters human body, institute
To need first to carry out corresponding safe handling work when purifying dilute sulfuric acid, to guarantee the safety of operator；
Step 2 will become solid dust when impurity is high-temperature cracked into gas in dilute sulfuric acid, thus carry out next step it
Before, necessity will first carry out dust removal process, can be by gas and dust separation by gas-solid separator to guarantee the degree of purity of gas
Out；
Step 3 needs to carry out cooling work after completing dust removal process, it is necessary first to using heat exchanger by the temperature of flue gas
It is reduced to condenser acceptable temperature（Such as 280 DEG C）, after cooling, then flue gas is put into condenser and further decreases temperature
Degree, it is 98% concentrated sulfuric acid that concentration, which is eventually made,；
Step 4, micro SO2 is oxidized to SO3 in flue gas, needs to remove the acid mist in flue gas using demister, then again will
Extra moisture is discharged into atmosphere；
Step 5 finally needs to carry out exhaust gas treatment, guarantees exhaust gas qualified discharge, and whole process is generated without waste water, waste residue,
So without the processing work for carrying out waste water, waste residue.
Gas-solid separator in step 2 is one or more, can have more the efficiency that actual demand improves purification in this way,
It can reduce the cost of production.
Step 4 is the combination of more heat exchangers and condenser, in this way can streamline operation, improve production efficiency.
By taking the impure 15% dilute sulfuric acid concentration unit of 10,000 tons/year of scales as an example.High-temperature flue gas is made by burner.It is dilute
Sulfuric acid is sprayed into pyrolysis furnace by dilute sulfuric acid spray gun, is cracked under conditions of 300 ~ 700 DEG C.The high-temperature flue gas warp of pyrolysis furnace out
Filter dedusting.Flue gas after dedusting is cooled to 280 DEG C and further cools down into condenser, and 98% concentrated sulfuric acid is made.In flue gas
Micro SO2 be oxidized to SO3, then remove acid mist in flue gas through demister, excessive moisture is discharged into atmosphere with flue gas.Whole system
No waste water, waste residue generate, exhaust gas qualified discharge.
In conclusion diluted acid upgrading system of the present invention and its production technology are by sulfuric acid decomposition at sulfur trioxide and water, dedusting
It synthesizes sulfuric acid again afterwards, simplifies production stage, improve production efficiency, reduce production cost.The present invention will be impure dilute
Sulfuric acid heating and gasifying, but gasification temperature control, lower than the temperature for making SO3 resolve into SO2 and O2, gas is set by separating at high temperature
Back-up separates out the solid dust in gas phase, then cools down again, and SO3 and H2O in gas phase is made to condense to obtain the pure concentrated sulfuric acid again.
Extra water is discharged into atmosphere.This method had not only widened the spent acid type of diluted acid concentrate, but also reduced the burning use of cracking technology
And cost of investment.Common impure dilute sulfuric acid, which uses, to be distilled and concentrated and sulfuric acid can not be made to be purified, while inevitably
The problems such as blocking of meeting generation system, fouling, affect the continuous-stable of system.And common cracking technology is made due to cracking temperature height
Fuel consumption is big, leads to high production cost.SO3 resolves into SO2 and O2 when cracking simultaneously, again becomes them in relieving haperacidity
SO3 also results in the raising of production cost and cost of investment.The present invention synthesizes after dedusting again only by sulfuric acid decomposition at SO3 and water
Sulfuric acid, so that bring economic benefit is obviously.
Particular embodiments described above, the technical issues of to solution of the invention, technical scheme and beneficial effects carry out
It is further described, it should be understood that the above is only a specific embodiment of the present invention, is not limited to
The present invention, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in this
Within the protection scope of invention.
Claims (6)
1. a kind of diluted acid upgrading system, which is characterized in that it includes equipment for gasification, gas-solid separator, heat exchanger, condenser, dilute
Sour upgrading system is in concentrate diluted acid, it is necessary first to dilute sulfuric acid gasify in equipment for gasification, resolve into SO3 and water, decomposing
A large amount of dust can be carried while dilute sulfuric acid secretly, then use gas-solid separator, the dust being filtered to remove in flue gas, go chalk dust removing it
Afterwards, heat exchanger is recycled to reduce the temperature of flue gas, finally within the condenser by flue gas SO3 and water cooling congeal into acid, then will
Atmosphere is discharged into after extra moisture is purified.
2. diluted acid upgrading system as described in claim 1, which is characterized in that the gas-solid separator is metal or ceramic filter
Device.
3. diluted acid upgrading system as described in claim 1, which is characterized in that the equipment for gasification, gas-solid separator, heat exchange
Device, condenser are sequentially connected.
4. a kind of production technology of diluted acid upgrading system, which is characterized in that it includes the following steps：
High-temperature flue gas is made by burner first in step 1, then by the dilute sulfuric acid heating and gasifying containing impurity, gasification temperature is wanted
The all liq in dilute sulfuric acid can be made all to gasify, while again lower than the temperature for making SO3 resolve into SO2 and O2, sulfuric acid is adding
Water and sulfur trioxide can be generated under conditions of heat, because it is danger close that sulfur trioxide, which enters human body, in purification dilute sulfuric acid
When need first to carry out corresponding safe handling work, to guarantee the safety of operator；
Step 2 will become solid dust when impurity is high-temperature cracked into gas in dilute sulfuric acid, thus carry out next step it
Before, necessity will first carry out dust removal process, can be by gas and dust separation by gas-solid separator to guarantee the degree of purity of gas
Out；
Step 3 needs to carry out cooling work after completing dust removal process, it is necessary first to using heat exchanger by the temperature of flue gas
It is reduced to condenser acceptable temperature, after cooling, then flue gas is put into condenser and further decreases temperature, be eventually made
Concentration is 98% concentrated sulfuric acid；
Step 4, micro SO2 is oxidized to SO3 in flue gas, needs to remove the acid mist in flue gas using demister, then again will
Extra moisture is discharged into atmosphere；
Step 5 finally needs to carry out exhaust gas treatment, guarantees exhaust gas qualified discharge, and whole process is generated without waste water, waste residue,
So without the processing work for carrying out waste water, waste residue.
5. the production technology of diluted acid upgrading system as claimed in claim 4, which is characterized in that the gas-solid point in the step 2
It is one or more from device.
6. the production technology of diluted acid upgrading system as claimed in claim 4, which is characterized in that the step 4 is more heat exchange
The combination of device and condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832595.5A CN108862211A (en) | 2018-07-26 | 2018-07-26 | Diluted acid upgrading system and its production technology |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810832595.5A CN108862211A (en) | 2018-07-26 | 2018-07-26 | Diluted acid upgrading system and its production technology |
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| Publication Number | Publication Date |
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| CN108862211A true CN108862211A (en) | 2018-11-23 |
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| CN201810832595.5A Pending CN108862211A (en) | 2018-07-26 | 2018-07-26 | Diluted acid upgrading system and its production technology |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229802A (en) * | 2021-12-16 | 2022-03-25 | 安徽华塑股份有限公司 | Method for concentrating dilute sulfuric acid in chlorine drying procedure |
Citations (5)
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| CN1792416A (en) * | 2005-11-24 | 2006-06-28 | 南京航空航天大学 | Adsorption coordinated with plasma affected method for desulphurization and denitration |
| US20090025919A1 (en) * | 2003-08-20 | 2009-01-29 | Japan Atomic Energy Research Institute | Compact heat exchanger made of ceramics having corrosion resistance at high temperature |
| CN101891161A (en) * | 2010-06-29 | 2010-11-24 | 上海华谊微电子材料有限公司 | Preparation method of ultra-pure sulfuric acid |
| CN105565281A (en) * | 2016-02-16 | 2016-05-11 | 韩功篑 | Preparation method for hyperpure sulphuric acid |
| CN105621374A (en) * | 2016-02-16 | 2016-06-01 | 江苏达诺尔科技股份有限公司 | Preparation method of ultra-pure sulfuric acid |
-
2018
- 2018-07-26 CN CN201810832595.5A patent/CN108862211A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090025919A1 (en) * | 2003-08-20 | 2009-01-29 | Japan Atomic Energy Research Institute | Compact heat exchanger made of ceramics having corrosion resistance at high temperature |
| CN1792416A (en) * | 2005-11-24 | 2006-06-28 | 南京航空航天大学 | Adsorption coordinated with plasma affected method for desulphurization and denitration |
| CN101891161A (en) * | 2010-06-29 | 2010-11-24 | 上海华谊微电子材料有限公司 | Preparation method of ultra-pure sulfuric acid |
| CN105565281A (en) * | 2016-02-16 | 2016-05-11 | 韩功篑 | Preparation method for hyperpure sulphuric acid |
| CN105621374A (en) * | 2016-02-16 | 2016-06-01 | 江苏达诺尔科技股份有限公司 | Preparation method of ultra-pure sulfuric acid |
Non-Patent Citations (1)
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| 纪罗军等: "我国废硫酸的资源化利用与循环经济", 《硫酸工业》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114229802A (en) * | 2021-12-16 | 2022-03-25 | 安徽华塑股份有限公司 | Method for concentrating dilute sulfuric acid in chlorine drying procedure |
| CN114229802B (en) * | 2021-12-16 | 2024-01-16 | 安徽华塑股份有限公司 | Concentration method of dilute sulfuric acid in chlorine drying process |
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