CN106276812B - 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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- CN106276812B CN106276812B CN201610825689.0A CN201610825689A CN106276812B CN 106276812 B CN106276812 B CN 106276812B CN 201610825689 A CN201610825689 A CN 201610825689A CN 106276812 B CN106276812 B CN 106276812B
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- exhaust gas
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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- Y02P20/10—Process efficiency
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Abstract
The invention discloses a kind of high temperature sulphur-containing exhaust gas to 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), drier (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, achievees the purpose that energy-optimised configuration；By removing the vapor being rich in exhaust gas in advance, takes " enrichment " to add the mode of " double absorption " sulfur dioxide, effectively reduce absorption equipment size, strengthen mass-transfer efficiency, realize energy-saving target；Public resource and prior art are made full use of simultaneously, to improve the overall efficiency of system.
Description
Technical field
The present invention is environmental protection and field of chemical engineering, is related to industrial waste gas high value added utilization, contains especially suitable for high temperature
Sulphur exhaust gas prepares liquid sulfur dioxide field.
Background technique
Sulfur dioxide is Air Pollutants, and adsorbent dry desulfurization such as active coke desulphurizing etc. is scrubbing CO_2 weight
Want means.To control cost, adsorbent usually requires regeneration cycle use, and wherein desorption under high temperature is that adsorbent commonly uses regeneration side
Method.Industrial carrier gas when generally employing nitrogen as hot recycling, since sulfur dioxide concentration is lower in the stripping gas of generation,
It is usually used in preparing dilute sulfuric acid.But due to dilute sulfuric acid products application narrow range, the added value as desulfuration byproduct is low.
Compared with dilute sulfuric acid, liquid sulfur dioxide is widely used in food service industry and textile industry, have be widely used, valence
It is worth high advantage.Therefore, environmental protection pressure can be effectively relieved for sulfur dioxide liquid in the Sulphur Dioxide in stripping gas, and
It is able to achieve the high value added utilization of industrial waste gas.
Currently, the method for industrial mass production liquid sulfur dioxide mainly has absorption process, pure oxygen combustion sulphur method, sulfur trioxide
Reduction method, sulfuric acid decomposition method etc..The difference of various methods is mainly concentrated in terms of obtaining the sulfur dioxide gas of high concentration.
After obtaining high-concentration sulfur dioxide gas, it is generally used pressurization or cooling method, or using pressurization and cools down
Method produces sulfur dioxide liquid.
By improving the hot recycling mode of desulfurizing agent, using vapor as carrier come Desorption desulphurization agent, because vapor is easily cold
It is solidifying, vapor is separated and can condensing by cooling down to stripping gas, thus enrichment sulfur dioxide, gained gas is prepared by absorption process again
Liquid sulfur dioxide.Recycling prepares sulfur dioxide liquid in the stripping gas generated when from desulfurizing agent hot recycling, because sulfur dioxide comes
Source is stable and cheap, has on production cost and has great advantage.
Conventional suction method prepares sulfur dioxide liquid technology, usually by flue gas first after dedusting cools down, then is passed through absorption tower
It absorbs.Which do not recycle and using flue gas energy, therefore the usually low exhaust gas of suitable treatment heat quality.Meanwhile it passing
Unite absorption pattern processing sulfur dioxide in flue gas content it is generally lower, cause that desulphurization plant is bulky, doctor solution consumption is big
And loss is high, increases system total energy consumption, to further increase the cost of product.
During preparing sulfur dioxide liquid by high temperature sulphur-containing exhaust gas, each temperature difference for flowing stock and reaction unit compared with
Greatly, by reasonably arranging, the Optimum utilization of energy may be implemented.
Summary of the invention
To solve the above problems, the present invention provides a kind of high temperature sulphur-containing exhaust gas to prepare liquid sulfur dioxide device, sufficiently
Achieve the purpose that energy-optimised configuration using the high temperature properties of sulphur-containing exhaust gas by adjusting the logistics order of connection；By taking off in advance
The vapor being rich in removing exhaust gas takes " enrichment " to add the mode of " double absorption " sulfur dioxide, effectively reduces and absorb
Equipment size strengthens mass-transfer efficiency, realizes energy-saving target；Public resource and prior art are made full use of simultaneously, to mention
The overall efficiency of high system, specific technical solution are as follows:
A kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device, including filter, reboiler, phase-change condenser, suction
Tower, lean/rich liquid heat exchanger, desorber, drier, gasification condenser, compressor and sulfur dioxide liquid storage tank are received,
The filter, reboiler, phase-change condenser, absorption tower, lean/rich liquid heat exchanger, desorber, drier, gas
Change condenser, compressor and sulfur dioxide liquid storage tank to be sequentially connected；Absorption tower and lean/rich liquid heat exchanger pass through rich solution pipeline
It is connected with lean solution pipeline；Reboiler is connect with lean/rich liquid heat exchanger and desorber respectively.
Further, including circulating pump and absorbing liquid storage tank, circulating pump and absorbing liquid storage tank are sequentially connected and are mounted on absorption
In the rich solution access and lean solution access of tower and lean/rich liquid heat exchanger.
Further, including the multistage absorption tower being sequentially connected, absorption tower exports content of sulfur dioxide and is lower than 20mg/Nm3。
Further, the temperature in the filter is 350-450 DEG C.
Further, the reboiler uses coiled indirect heating, and pipe inner heat source is high temperature sulphur-containing exhaust gas and supplements steam,
Two heat sources are independent each other, and coil pipe is arranged using alternating expression.
Further, the phase-change condenser is plate-type condenser or shell-and-tube heat exchanger, and phase-change condenser uses multistage simultaneously
Connection, phase-change condenser outlet temperature are 70-90 DEG C.
Further, the desiccant in the drier uses solid acid desiccant or the concentrated sulfuric acid, and desiccant is using filling
Bed form filling.
Further, refrigerant used is liquefied ammonia in the gasification condenser, and cooling temperature is -15 DEG C.
Further, the compressor uses non lubricant oil structure.
The beneficial effects of the present invention are:
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 matches
The purpose set；By removing the vapor being rich in exhaust gas in advance, " enrichment " is taken to add " double absorption " sulfur dioxide
Mode, effectively reduce absorption equipment size, strengthen mass-transfer efficiency, realize energy-saving target；It makes full use of simultaneously public
Resource and prior art, to improve the overall efficiency of system.
The technique device main advantage: (1) the stripping gas outlet temperature that the hot recycling process of desulfurizing agent generates is higher than 400
DEG C, and the absorption of the solution of sulfur dioxide needs to carry out under cryogenic, the multiple-effect that high-temperature gradient is conducive to energy utilizes；(2)
Using high-temperature dust removing device, when removing solid dust and oiliness impurity, particle agglomeration and pipe caused by avoiding because of cryogenic condensation
Road blocking；(3) water vapor removing in the way of phase transformation condensation, realizes " enrichment " of SO 2 in waste gas；(4) it utilizes
Sulfur dioxide absorbing liquid orients sulfur dioxide absorption, realizes efficiently separating for sulfur dioxide；(5) two are freezed using liquid ammonia gasification
Sulfur oxide makes full use of public resource and reaches energy saving purpose.
The technology is of great significance for the higher value application of energy-saving and emission-reduction, energy cascade recycling and industrial waste gas.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is multistage absorption embodiment schematic diagram of the present invention.
Specific embodiment
It is described below in conjunction with principle and feature of the attached drawing to invention, the given examples are served only to explain the present invention, not
For limiting the scope of the 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, drier 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 access.Absorption tower
4, absorbing liquid storage tank 6, circulating pump 5, lean/rich liquid heat exchanger 7, desorber 8 are sequentially connected to form rich solution access.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 to be formed
Lean solution access.Desorber 8, drier 9, gasification condenser 10, compressor 11 and sulfur dioxide liquid storage tank 12 are sequentially connected shape
At sulfur dioxide access.
High temperature gas stream containing hydrogen sulphide cleans to: high temperature sulphur-containing exhaust gas through 1 dedusting of efficient ceramic filter, the temperature in filter 1
It is 350-450 DEG C.Enter 2 heating desorption tower bottoms of reboiler consequently as heat source, low temperature sulphur-containing exhaust gas passes through phase-change condenser 3
Water vapour is removed, i.e. steam condensate is discharged from phase-change condenser 3, and phase-change condenser 3 is that plate-type condenser or shell-and-tube change
Hot device, phase-change condenser 3 is in parallel using one or more levels, and 3 outlet temperature of phase-change condenser is 70-90 DEG C.Then on absorption tower 4
It is interior with sulfur dioxide absorbing liquid counter-current absorption, after be emitted into flue.
Lean/rich liquid stream to: sulfur dioxide absorbing liquid (rich solution) in absorption tower 4 is in lean/rich liquid heat exchanger 7 and from again
The high-temperature barren liquor heat exchange of device 2 is boiled, reboiler 2 uses coiled indirect heating, and pipe inner heat source is that high temperature sulphur-containing exhaust gas and supplement are steamed
Vapour, two heat sources are independent each other, and coil pipe is arranged using alternating expression.Enter desorber 8 later.Sulfur dioxide absorbing liquid (rich solution) and height
Temperature steam counter current contacting becomes absorbing liquid (lean solution) in 8 bottom of desorber, enters in reboiler 2 generate high-temperature steam later.
High temperature absorbing liquid (lean solution) from reboiler 2 through high temperature circulation pump 51, until 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 sent by circulating pump 52 to absorption tower 4 and pushed up
Portion.
Sulfur dioxide flow direction: it is inhaled from the high-temperature steam generated in reboiler 2 with the sulfur dioxide entered at the top of desorber 8
It receives liquid (rich solution) adverse current to desorb, stripping gas, which enters in drier 9, to be dehydrated, and the desiccant in drier 9 is dry using solid acid
Agent or the concentrated sulfuric acid, desiccant are filled using packed bed form.Then it is cooled down, gasifies cold indirectly by liquefied ammonia in gasification condenser 10
Refrigerant used is liquefied ammonia in condenser 10, and cooling temperature is -15 DEG C.Ammonia after gasification enters SCR workshop section, low temperature sulfur dioxide into
It further liquefies after entering compressor 11, then passes in sulfur dioxide liquid storage tank 12 and store.Compressor 11 uses non lubricant oil
Structure.
Embodiment 2:
As shown in Fig. 2, absorption tower uses two-stage series connection structure, i.e. absorption tower 4 and absorption tower 41 is connected.Two absorption towers point
Not Lian Jie an absorbing liquid storage tank 6, lean/rich liquid heat exchanger 7 is connected by circulating pump 5, the lean/rich connection of liquid heat exchanger 7 solution
It inhales tower 8 and constitutes rich solution access.Reboiler 2 connects lean/rich liquid heat exchanger 7 by circulating pump 51, and lean/rich liquid heat exchanger 7 connects
It connects absorbing liquid storage tank 61 and connects absorption tower 4 and absorption tower 41 by two circulating pumps (circulating pump 52 and circulating pump 53) respectively.Tail
Content of sulfur dioxide is lower than 20mg/Nm in gas3.Remaining structure is the same as embodiment 1.
Embodiment 3:
It is recycled after returning to the liquefaction of freezing workshop section from the ammonia that gasification condenser 10 comes out in embodiment 1.Remaining knot
Structure is the same as embodiment 1.
The foregoing is merely preferable combination implementation examples of the invention, are not intended to limit the invention, all of the invention
Within spirit and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (8)
1. a kind of high temperature sulphur-containing exhaust gas prepares liquid sulfur dioxide device, which is characterized in that including filter (1), reboiler
(2), phase-change condenser (3), absorption tower (4), lean/rich liquid heat exchanger (7), desorber (8), drier (9), gasification condenser
(10), compressor (11) and sulfur dioxide liquid storage tank (12),
The filter (1), reboiler (2), phase-change condenser (3), absorption tower (4), lean/rich liquid heat exchanger (7), desorber
(8), drier (9), gasification condenser (10), compressor (11) and sulfur dioxide liquid storage tank (12) are sequentially connected；Absorption tower
(4) it is connected by rich solution pipeline with lean 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) connection；The reboiler (2) uses coiled indirect heating, and pipe inner heat source is high temperature sulphur-containing exhaust gas
And supplement steam, two heat sources are independent each other, and coil pipe is arranged using alternating expression.
2. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that including circulating pump
With absorbing liquid storage tank, circulating pump and absorbing liquid storage tank are sequentially connected and are mounted on absorption tower (4) and lean/rich liquid heat exchanger (7)
Rich solution access and lean solution access in.
3. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that including successively phase
Multistage absorption tower (4) even, absorption tower (4) export content of sulfur dioxide and are lower than 20mg/Nm3。
4. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that the filter
(1) temperature in is 350-450 DEG C.
5. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that the phase turns cold
Condenser (3) is plate-type condenser or shell-and-tube heat exchanger, and phase-change condenser (3) uses plural parallel stage, phase-change condenser (3) outlet
Temperature is 70-90 DEG C.
6. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that the drier
(9) desiccant in uses solid acid desiccant or the concentrated sulfuric acid, and desiccant is filled using packed bed form.
7. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that the gasification is cold
Refrigerant used is liquefied ammonia in condenser (10), and cooling temperature is -15 DEG C.
8. high temperature sulphur-containing exhaust gas as described in claim 1 prepares liquid sulfur dioxide device, which is characterized in that the compressor
(11) non lubricant oil structure is used.
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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 |
| 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 |
| CN112370856B (en) * | 2020-11-10 | 2022-06-14 | 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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| CN206172978U (en) * | 2016-09-14 | 2017-05-17 | 北京清新环境技术股份有限公司 | High temperature contains sulphur waste gas preparation liquid sulfur dioxide device |
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| PE20140441A1 (en) * | 2010-10-29 | 2014-04-14 | Mecs Inc | REGENERATIVE RECOVERY OF SULFUR DIOXIDE FROM EFFLUENT GASES |
| CN102327726B (en) * | 2011-07-15 | 2013-06-12 | 攀钢集团有限公司 | Method for dewatering desorption gas for flue gas desulfurization and recycling condensate |
| CN104226096B (en) * | 2014-09-25 | 2017-02-08 | 长沙华时捷环保科技发展股份有限公司 | Multi-flow-path circulating desulfurization system and multi-flow-path circulating desulfurization method |
| CN104208985B (en) * | 2014-09-29 | 2016-08-24 | 长沙华时捷环保科技发展股份有限公司 | Fume desulphurization method and system |
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