CN106276812A - A kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device - Google Patents
A kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device Download PDFInfo
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- CN106276812A CN106276812A CN201610825689.0A CN201610825689A CN106276812A CN 106276812 A CN106276812 A CN 106276812A CN 201610825689 A CN201610825689 A CN 201610825689A CN 106276812 A CN106276812 A CN 106276812A
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- sulfur dioxide
- high temperature
- exhaust gas
- containing exhaust
- condenser
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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
- C01B17/48—Sulfur dioxide; Sulfurous acid
- C01B17/50—Preparation of sulfur dioxide
- C01B17/56—Separation; Purification
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention discloses a kind of high temperature sulphur-containing exhaust gas and prepare liquid sulfur dioxide device, including filter (1), reboiler (2), phase-change condenser (3), absorption tower (4), lean/rich liquid heat exchanger (7), desorber (8), exsiccator (9), gasification condenser (10), compressor (11) and sulfur dioxide liquid storage tank (12).The present invention makes full use of the high temperature properties of sulphur-containing exhaust gas, by adjusting the logistics order of connection, reaches the purpose of energy-optimised configuration；By remove in advance in waste gas rich in steam, sulfur dioxide is taked " enrichment " add the mode of " double absorption ", effectively reduces absorption equipment size, strengthen mass-transfer efficiency, it is achieved energy-saving and cost-reducing target；Make full use of public resource and existing technique, to improve the overall efficiency of system simultaneously.
Description
Technical field
The present invention is environmental protection and field of chemical engineering, relates to industrial waste gas high value added utilization, is particularly well-suited to high temperature and contains
Sulfur waste gas prepares liquid sulfur dioxide field.
Background technology
Sulfur dioxide is Air Pollutants, and adsorbent dry desulfurization such as active coke desulphurizing etc. is scrubbing CO_2 weight
Want means.For controlling cost, adsorbent typically requires regeneration cycle and uses, and wherein desorption under high temperature is the conventional regeneration side of adsorbent
Method.Industry typically employs nitrogen as carrier gas during hot recycling, owing in the stripping gas that generates, sulfur dioxide concentration is relatively low, therefore
It is usually used in preparing dilute sulfuric acid.But due to dilute sulfuric acid products application narrow range, it is low as the added value of desulfuration byproduct.
Compared with dilute sulfuric acid, liquid sulfur dioxide is widely used in food service industry and textile industry, have be widely used, valency
It is worth high advantage.Therefore, it is that sulfur dioxide liquid can effectively alleviate environmental protection pressure by the Sulphur Dioxide in stripping gas, and
The high value added utilization of industrial waste gas can be realized.
At present, the method for industrial mass production liquid sulfur dioxide mainly has absorption process, pure oxygen to fire sulfur method, sulfur trioxide
Reducing process, sulfuric acid decomposition method etc..The difference of various methods is mainly concentrated in obtaining the sulfur dioxide gas aspect of high concentration.
After obtaining high-concentration sulfur dioxide gas, the most all use pressurization or cooling method, or use pressurization and cooling
Method produces sulfur dioxide liquid.
By improving the hot recycling mode of desulfurizing agent, steam is used to carry out Desorption desulphurization agent as carrier, because steam is the coldest
Solidifying, steam can be separated by stripping gas cooling is condensed, thus enrichment sulfur dioxide, gained gas is prepared by absorption process again
Liquid sulfur dioxide.The stripping gas generated when desulfurizing agent hot recycling, sulfur dioxide liquid is prepared in recovery, because sulfur dioxide comes
Source is stable and cheap, has and have great advantage on production cost.
Conventional suction method prepares sulfur dioxide liquid technology, after generally flue gas elder generation removing dust being lowered the temperature, then is passed through absorption tower
Absorb.Which does not reclaim and utilizes the energy of flue gas, the waste gas that therefore generally suitable treatment heat quality is low.Meanwhile, pass
The sulfur dioxide in flue gas content that system absorption pattern processes is the most relatively low, causes that desulphurization plant is bulky, doctor solution consumption is big
And loss height, make system total energy consumption increase, thus further increase the cost of product.
During being prepared sulfur dioxide liquid by high temperature sulphur-containing exhaust gas, the temperature difference of each stream stock and reaction unit is relatively
Greatly, by reasonably arranging, it is possible to achieve the Optimum utilization of energy.
Summary of the invention
For solving the problems referred to above, the invention provides a kind of high temperature sulphur-containing exhaust gas and prepare liquid sulfur dioxide device, fully
Utilize the high temperature properties of sulphur-containing exhaust gas, by adjusting the logistics order of connection, reach the purpose of energy-optimised configuration；By taking off in advance
In removing exhaust gas rich in steam, sulfur dioxide is taked " enrichment " add the mode of " double absorption ", effectively reduces absorption
Equipment size, strengthens mass-transfer efficiency, it is achieved energy-saving and cost-reducing target；Make full use of public resource and existing technique, to carry simultaneously
The overall efficiency of high system, concrete technical scheme is as follows:
A kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device, including filter, reboiler, phase-change condenser, suction
Receive tower, lean/rich liquid heat exchanger, desorber, exsiccator, gasification condenser, compressor and sulfur dioxide liquid storage tank,
Described filter, reboiler, phase-change condenser, absorption tower, lean/rich liquid heat exchanger, desorber, exsiccator, gas
Change condenser, compressor and sulfur dioxide liquid storage tank to be sequentially connected；Absorption tower and lean/rich liquid heat exchanger are by rich solution pipeline
It is connected with lean liquid pipeline；Reboiler is connected with lean/rich liquid heat exchanger and desorber respectively.
Further, it is sequentially connected with including circulating pump and absorbing liquid storage tank, circulating pump and absorbing liquid storage tank and is arranged on absorption
In the rich solution path of tower and lean/rich liquid heat exchanger and lean solution path.
Further, including the multistage absorption tower being sequentially connected, absorption tower outlet content of sulfur dioxide is less than 20mg/Nm3。
Further, the temperature in described filter is 350-450 DEG C.
Further, described reboiler uses coiled indirectly to heat, and pipe endogenous pyrogen is high temperature sulphur-containing exhaust gas and supplementary steam,
Two thermals source are independent each other, and coil pipe uses alternating expression arrangement.
Further, described phase-change condenser is plate-type condenser or shell-and-tube heat exchanger, and phase-change condenser employing is multistage also
Connection, phase-change condenser outlet temperature is 70-90 DEG C.
Further, the desiccant in described exsiccator uses solid acid desiccant or concentrated sulphuric acid, and desiccant uses fills
Bed form is filled.
Further, in described gasification condenser, coolant used is liquefied ammonia, and chilling temperature is-15 DEG C.
Further, described compressor uses non lubricant oil structure.
The invention has the beneficial effects as follows:
The present invention makes full use of the high temperature properties of sulphur-containing exhaust gas, by adjusting the logistics order of connection, reaches energy-optimised and joins
The purpose put；By remove in advance in waste gas rich in steam, sulfur dioxide is taked " enrichment " add " double absorption "
Mode, effectively reduce absorption equipment size, strengthen mass-transfer efficiency, it is achieved energy-saving and cost-reducing target；Make full use of public simultaneously
Resource and existing technique, to improve the overall efficiency of system.
This technique device main advantage: the stripping gas outlet temperature that the hot recycling process of (1) desulfurizing agent produces is higher than 400
DEG C, and the solution of sulfur dioxide absorbs and needs to carry out under cryogenic, high-temperature gradient is beneficial to the multiple-effect of energy and utilizes；(2)
Use high-temperature dust removing device, when removing solid dust and oiliness impurity, it is to avoid the particle agglomeration caused because of condensation at low temperature and pipe
Road blocks；(3) the mode water vapor removing that phase transformation condenses is utilized, it is achieved " enrichment " of SO 2 in waste gas；(4) utilize
Sulfur dioxide absorbing liquid orientation sulfur dioxide absorption, it is achieved efficiently separating of sulfur dioxide；(5) liquid ammonia gasification freezing two is used
Sulfur oxide, makes full use of public resource and reaches energy-conservation purpose.
This technology is significant for the higher value application of energy-saving and emission-reduction, energy cascade recovery and industrial waste gas.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is multistage absorption embodiment schematic diagram of the present invention.
Detailed description of the invention
Being described principle and the feature of invention below in conjunction with accompanying drawing, example is served only for explaining the present invention, not
For limiting the scope of the present invention.
Embodiment 1:
Such as Fig. 1, a kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device, including efficient ceramic filter 1, reboiler
2, phase-change condenser 3, absorption tower 4, circulating pump, absorbing liquid storage tank, lean/rich liquid heat exchanger 7, desorber 8, exsiccator 9, gasification
Condenser 10, compressor 11 and sulfur dioxide liquid storage tank 12.
Filter 1, reboiler 2, phase-change condenser 3, absorption tower 4 are sequentially connected, and form high temperature sour gas path.Absorption tower
4, absorbing liquid storage tank 6, circulating pump 5, lean/rich liquid heat exchanger 7, desorber 8 are sequentially connected formation rich solution path.Desorber 8, again
Boiling device 2, high temperature circulation pump 51, lean/rich liquid heat exchanger 7, absorbing liquid storage tank 61, circulating pump 52, absorption tower 4 are sequentially connected formation
Lean solution path.Desorber 8, exsiccator 9, gasification condenser 10, compressor 11 and sulfur dioxide liquid storage tank 12 are sequentially connected shape
Become sulfur dioxide path.
High temperature gas stream containing hydrogen sulphide to: high temperature sulphur-containing exhaust gas is through efficient ceramic filter 1 dedusting remove impurity, the temperature in filter 1
For 350-450 DEG C.Entering reboiler 2 heating desorption tower bottoms consequently as thermal source, low temperature sulphur-containing exhaust gas is through phase-change condenser 3
Removing water vapour, i.e. steam condensate are discharged from phase-change condenser 3, and phase-change condenser 3 changes for plate-type condenser or shell-and-tube
Hot device, phase-change condenser 3 uses one or more levels in parallel, and phase-change condenser 3 outlet temperature is 70-90 DEG C.Then on absorption tower 4
In with sulfur dioxide absorbing liquid counter-current absorption, after be emitted into flue.
Lean/rich liquid stream to: the sulfur dioxide absorbing liquid (rich solution) in absorption tower 4 in lean/rich liquid heat exchanger 7 with from again
The high-temperature barren liquor heat exchange of boiling device 2, reboiler 2 uses coiled indirectly to heat, and pipe endogenous pyrogen is high temperature sulphur-containing exhaust gas and supplements steaming
Vapour, two thermals source are independent each other, and coil pipe uses alternating expression arrangement.Enter desorber 8 afterwards.Sulfur dioxide absorbing liquid (rich solution) is with high
Temperature steam counter current contacting, becomes absorbing liquid (lean solution) bottom desorber 8, enters afterwards in reboiler 2 and generate high-temperature steam.
High temperature absorbing liquid (lean solution) from reboiler 2 through high temperature circulation pump 51, in lean/rich liquid heat exchanger 7 with sulfur dioxide absorbing liquid
(rich solution) indirect heat exchange, absorbing liquid (lean solution) after cooling enters absorbing liquid storage tank 61, and is delivered to absorption tower 4 by circulating pump 52 and push up
Portion.
Sulfur dioxide flows to: the high-temperature steam generated from reboiler 2 is inhaled with the sulfur dioxide entered from desorber 8 top
Receiving liquid (rich solution) countercurrently desorbing, stripping gas enters in exsiccator 9 and is dehydrated, and the desiccant in exsiccator 9 uses solid acid to be dried
Agent or concentrated sulphuric acid, desiccant uses packed bed form to fill.Then indirectly cooled down by liquefied ammonia in gasification condenser 10, gasify cold
In condenser 10, coolant used is liquefied ammonia, and chilling temperature is-15 DEG C.Ammonia after gasification enters SCR workshop section, and low temperature sulfur dioxide enters
Liquefy further after entering compressor 11, then pass to sulfur dioxide liquid storage tank 12 stores.Compressor 11 uses non lubricant oil
Structure.
Embodiment 2:
As in figure 2 it is shown, absorption tower uses two-stage series connection structure, i.e. absorption tower 4 and absorption tower 41 to connect.Two absorption towers are divided
Not Lian Jie an absorbing liquid storage tank 6, connect lean/rich liquid heat exchanger 7 by circulating pump 5, lean/rich liquid heat exchanger 7 connects and solves
Inhale tower 8 and constitute rich solution path.Reboiler 2 connects lean/rich liquid heat exchanger 7 by circulating pump 51, and lean/rich liquid heat exchanger 7 is even
Connect absorbing liquid storage tank 61 and connect absorption tower 4 and absorption tower 41 by two circulating pumps (circulating pump 52 and circulating pump 53) respectively.Tail
In gas, content of sulfur dioxide is less than 20mg/Nm3.Remaining structure is with embodiment 1.
Embodiment 3:
Return freezing workshop section liquefaction Posterior circle from condenser 10 ammonia out that gasifies in embodiment 1 to use.Remaining knot
Structure is with embodiment 1.
The foregoing is only the present invention preferably combines implementation example, not in order to limit the present invention, all the present invention's
Within spirit and principle, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (9)
1. a high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device, it is characterised in that include filter (1), reboiler
(2), phase-change condenser (3), absorption tower (4), lean/rich liquid heat exchanger (7), desorber (8), exsiccator (9), gasification condenser
(10), compressor (11) and sulfur dioxide liquid storage tank (12),
Described filter (1), reboiler (2), phase-change condenser (3), absorption tower (4), lean/rich liquid heat exchanger (7), desorber
(8), exsiccator (9), gasification condenser (10), compressor (11) and sulfur dioxide liquid storage tank (12) are sequentially connected；Absorption tower
(4) it is connected with lean liquid pipeline by rich solution pipeline with lean/rich liquid heat exchanger (7)；Reboiler (2) is handed over lean/rich liquid heat respectively
Parallel operation (7) and desorber (8) connect.
2. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that include circulating pump
It is sequentially connected with and is arranged on absorption tower (4) and lean/rich liquid heat exchanger (7) with absorbing liquid storage tank, circulating pump and absorbing liquid storage tank
Rich solution path and lean solution path in.
3. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that include phase successively
Multistage absorption tower (4) even, absorption tower (4) outlet content of sulfur dioxide is less than 20mg/Nm3。
4. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that described filter
(1) temperature in is 350-450 DEG C.
5. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that described reboiler
(2) using coiled indirectly to heat, pipe endogenous pyrogen is high temperature sulphur-containing exhaust gas and supplementary steam, and two thermals source are independent each other, and coil pipe is adopted
Arrange with alternating expression.
6. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that described phase turns cold
Condenser (3) is plate-type condenser or shell-and-tube heat exchanger, and phase-change condenser (3) uses plural parallel stage, and phase-change condenser (3) exports
Temperature is 70-90 DEG C.
7. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that described exsiccator
(9) desiccant in uses solid acid desiccant or concentrated sulphuric acid, and desiccant uses packed bed form to fill.
8. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that described gasification is cold
In condenser (10), coolant used is liquefied ammonia, and chilling temperature is-15 DEG C.
9. high temperature sulphur-containing exhaust gas as claimed in claim 1 prepares liquid sulfur dioxide device, it is characterised in that described compressor
(11) non lubricant oil structure is used.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610825689.0A CN106276812B (en) | 2016-09-14 | 2016-09-14 | A kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device |
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| CN201610825689.0A CN106276812B (en) | 2016-09-14 | 2016-09-14 | A kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device |
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| CN106276812A true CN106276812A (en) | 2017-01-04 |
| CN106276812B CN106276812B (en) | 2019-07-12 |
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Cited By (4)
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| CN108147373A (en) * | 2017-12-28 | 2018-06-12 | 广西生富锑业科技股份有限公司 | A kind of method that flue gas during smelting prepares sulfuric acid |
| CN108872480A (en) * | 2018-06-12 | 2018-11-23 | 北京首仪华强电子设备有限公司 | The device that gas is analyzed in a kind of pair of high-sulfur atmosphere |
| CN110040692A (en) * | 2019-05-15 | 2019-07-23 | 大连科利德光电子材料有限公司 | Prepare the method and device of high-purity sulfur dioxide gas |
| CN112370856A (en) * | 2020-11-10 | 2021-02-19 | 西部宝德科技股份有限公司 | Filtration and separation system and method for recovering ethylene oligomerization catalyst fine powder by dry method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108147373A (en) * | 2017-12-28 | 2018-06-12 | 广西生富锑业科技股份有限公司 | A kind of method that flue gas during smelting prepares sulfuric acid |
| CN108872480A (en) * | 2018-06-12 | 2018-11-23 | 北京首仪华强电子设备有限公司 | The device that gas is analyzed in a kind of pair of high-sulfur atmosphere |
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| CN110040692B (en) * | 2019-05-15 | 2024-02-09 | 大连科利德光电子材料有限公司 | Method and device for preparing high-purity sulfur dioxide gas |
| CN112370856A (en) * | 2020-11-10 | 2021-02-19 | 西部宝德科技股份有限公司 | Filtration and separation system and method for recovering ethylene oligomerization catalyst fine powder by dry method |
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