CN106362565A - Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method - Google Patents
Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method Download PDFInfo
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- CN106362565A CN106362565A CN201510433719.9A CN201510433719A CN106362565A CN 106362565 A CN106362565 A CN 106362565A CN 201510433719 A CN201510433719 A CN 201510433719A CN 106362565 A CN106362565 A CN 106362565A
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- oxidant
- tail gas
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Abstract
The invention discloses a dimethyl sulfide-containing tail gas absorption method, wherein sulfur-containing substances are subjected to oxidation degradation with an economic oxidizing agent. The method specifically comprises: 1, adding a degradation oxidizing agent into a gas scrubber; 2, introducing borane dimethyl sulfide reaction tail gas or dimethyl sulfide tail gas into the gas scrubber of the step 1; and 3, in the gas scrubber, carrying out an oxidation degradation reaction on the borane dimethyl sulfide reaction tail gas or dimethyl sulfide tail gas and the degradation oxidizing agent to achieve the emission standard. The present invention further discloses a dimethyl sulfide-containing tail gas absorption apparatus. According to the present invention, with the method and the apparatus, the odor and toxic gas emission is controlled and the environment is protected while the raw material consumption is reduced so as to achieve the sustainable development.
Description
Technical field
The present invention relates to a kind of absorption process of the tail gas containing dimethyl sulphide, oxidizing process degraded borane dimethylsulf iotade is specifically adopted to use
During the material such as dimethyl sulphide in tail gas；Moreover, it relates to a kind of absorption plant of the tail gas containing dimethyl sulphide.
Background technology
Dimethyl sulphide (dimethyl sulfide) is simplest thioether, the sulfur analogs of methyl ether.Dimethyl sulphide steam has and makes us
Offending abnormal smells from the patient, irritant to nose, larynx, cause cough and chest uncomfortable.Continue or high concentration suck occur headache,
Nausea and vomiting.Liquid or mist are irritant to eye, can cause dermatitis.
Borane dimethylsulfide ether complexes, as a kind of reducing agent, are a kind of convenience and stable borine source, for hydroboration,
Chemoselective reduction of alpha-hydroxy esters etc..In the chemical reaction process using borane dimethylsulf iotade, typically such reaction can be produced
The gases such as raw hydrogen, and only 38 DEG C of dimethyl sulphide boiling point at ambient pressure, tail gas are directly discharged, can contain diformazan in tail gas
Thioether, causes tail gas discharge beyond standards, makes laboratory or producing region abnormal smells from the patient larger.Which has limited the application of borane dimethylsulf iotade.
Therefore, a kind of device for absorbing tail gas containing dimethyl sulphide of research and development and method are needed badly.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of tail gas absorption method containing dimethyl sulphide, and oxidoreduction is applied to
Using on the tail gas absorption of borane dimethylsulf iotade it is achieved that dimethyl sulphide tail gas absorption efficiency reaches 95%, by reducing or eliminating
Dimethyl sulphide composition in tail gas, is controlling sulfurous gas discharge, reduces cost while environmental protection, is accomplishing sustainable development.
For this reason, the present invention also provides a kind of device for absorbing tail gas containing dimethyl sulphide.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
In one aspect of the invention, provide a kind of tail gas absorption method containing dimethyl sulphide, comprise the steps:
Step one: oxidant of degrading adds in air-washer；
Step 2: borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas are passed in the air-washer described in step one；
Step 3: in air-washer, borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas are aoxidized with degraded oxidant
Degradation reaction, reaches discharge standard.
As currently preferred technical scheme, increase following steps: air-washer bottom after step 3 oxidative degradation
Remaining degraded oxidant passes through to circulate pump circulation, and is passed through again by condenser cooling (being preferably cooled to less than 35 DEG C)
Air-washer recycles, and the degraded oxidant failing is discharged by the waste liquid discharge pipe being connected with condenser.
As currently preferred technical scheme, described air-washer can be the device such as pickling tower, reactor, storage tank.Step
In two, borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas are passed into washing described in step one by drying tower, anti-tank switching
In device of air.
As currently preferred technical scheme, in step 3, described borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas with
Degraded oxidant is sufficiently mixed in air-washer, carries out oxidative degradation；Described degraded oxidant and described borane dimethylsulfide
The weight of ether reaction end gas or dimethyl sulphide tail gas is 100:1～5:1 than scope, and reaction temperature is 5～35 DEG C.
As currently preferred technical scheme, described degraded oxidant is the economic oxidant referring to cacodyl oxide thioether, bag
Include 5%～10% aqueous sodium hypochlorite solution or alcoholic solution；2%～10% calcium hypochlorite aqueous solution or alcoholic solution, aqueous hydrogen peroxide solution.
Wherein, preferably 5%～10% aqueous sodium hypochlorite solution or alcoholic solution.Degraded oxidant with the weight of dimethyl sulphide tail gas than scope is:
100:1～5:1.The mechanism of its oxidative degradation is as follows:
Dimethyl sulphide tail gas is fully aoxidized with degraded by the mode such as spraying, stirring in the devices such as pickling tower, reactor, storage tank
Agent mixes, and reacts rapidly, and release heat at 5～35 DEG C, reaches the purpose of degraded dimethyl sulphide.
In another aspect of this invention, provide a kind of device for absorbing tail gas containing dimethyl sulphide, comprising: dimethyl sulphide offgas duct,
Air-washer, gas-liquid separator, exhaustor, degraded oxidant input pipe；Described dimethyl sulphide offgas duct, described degraded oxidation
Agent input pipe and described exhaustor are connected with described air-washer respectively, are provided with institute between described exhaustor and described air-washer
State gas-liquid separator.
As currently preferred technical scheme, led to by feed pump by the degraded oxidant that described degraded oxidant input pipe is passed through
Enter described air-washer；The remaining degraded in described air-washer bottom oxidant passes through to circulate pump circulation, and is lowered the temperature by condenser
It is passed through air-washer again to recycle；Dimethyl sulphide tail gas in described dimethyl sulphide offgas duct passes through drying tower, anti-tank switching leads to
Enter in air-washer.
As currently preferred technical scheme, described air-washer is pickling tower, reactor or storage tank；Described degraded oxidation
Agent is the economic oxidant referring to cacodyl oxide thioether, comprising: 5%～10% aqueous sodium hypochlorite solution or alcoholic solution, 2%～10%
Calcium hypochlorite aqueous solution or alcoholic solution, aqueous hydrogen peroxide solution.
It is an advantage of the current invention that:
1st, pass through oxidation degradation method it is achieved that the absorption efficiency of dimethyl sulphide tail gas 95%, reduce two in tail gas containing dimethyl sulphide
The content of methyl sulfide composition, makes exhaust emissions reach discharge standard, accomplishes environmental protection, sustainable development, and promotes borine two
The application of methyl sulfide.
2nd, degraded oxidant is economic oxidant, reduces the cost processing tail gas.
3rd, the inventive method produces borane dimethylsulf iotade, application borane dimethylsulf iotade synthesis r/s-1- phenylethanol, ammonia borane, boron
Alkanamine derivatives, Ezetimibe crude drug, Entecavir crude drug etc., have reached good dimethyl sulphide degradation effect.
Brief description
Fig. 1 is the structural representation of the device for absorbing tail gas that the present invention contains dimethyl sulphide.
In figure description of reference numerals is as follows:
1 is dimethyl sulphide offgas duct；
2 is pickling tower；
3 is gas-liquid separator；
4 is exhaustor；
5 is degraded oxidant input pipe；
6 is feed pump；
7 is circulating pump；
8 is condenser；
9 is waste liquid discharge pipe.
Specific embodiment
The present invention is explained in greater detail below with reference to embodiment, embodiments of the invention are merely to illustrate the technical side of the present invention
Case, and the essence of the non-limiting present invention.
In addition, the reagent being related in following examples is if not otherwise specified, then for commercially produced product.
Embodiment 1
As shown in figure 1, the invention discloses a kind of device for absorbing tail gas containing dimethyl sulphide, comprising: dimethyl sulphide offgas duct 1,
Pickling tower 2, gas-liquid separator 3, exhaustor 4, degraded oxidant input pipe 5, feed pump 6, circulating pump 7, condenser 8；
Dimethyl sulphide offgas duct 1, degraded oxidant input pipe 5 and exhaustor 4 are connected with pickling tower 2, respectively in exhaustor 4 and acid
Wash and between tower 2, be provided with gas-liquid separator 3；It is passed through by feed pump 6 by the degraded oxidant that degraded oxidant input pipe 5 is passed through
Pickling tower 2；Pickling tower 2 bottom remaining degraded oxidant is circulated by circulating pump 7, and is lowered the temperature by condenser 8 and lead to again
Enter pickling tower 2 to recycle, the degraded oxidant failing is discharged by the waste liquid discharge pipe 9 being connected with condenser 8.
Concrete absorption process is: the tail gas containing dimethyl sulphide producing during producing borane dimethylsulf iotade (is examined before vent gas treatment
Survey, dynamic content 0.1kg/m of dimethyl sulphide3～0.3kg/m3, tail gas flow velocity 0.8m3/ h) (passed through by dimethyl sulphide offgas duct 1
Drying tower, anti-tank switching) it is passed through pickling tower 2,10% aqueous sodium hypochlorite solution or alcoholic solution are as degraded oxidant, degraded oxidant
Pickling tower 2 is passed through by degraded oxidant input pipe 5 and feed pump 6, pickling tower 2 bottom remaining degraded oxidant passes through to follow
Ring pump 7 circulates, and is cooled to 35 DEG C by condenser 8 and is passed through pickling tower 2 again below and recycle, in pickling tower 2,
Tail gas containing dimethyl sulphide through degraded oxidant absorb after (described degraded oxidant with the weight ratio of the tail gas containing dimethyl sulphide be
100:1, reaction temperature is 5 DEG C～15 DEG C), carry out gas-liquid separation through gas-liquid separator 3, gas is discharged by exhaustor 4.
By exhaustor expellant gas, dimethyl sulphide content is less than 0.003kg/m after testing3, discharging dynamic range is
0.0002～0.003kg/h, the 0.33～0.52kg/h specifying far below gb14554-93 " emission standard for odor pollutants ", meet
Discharge standard.Dimethyl sulphide removal efficiency reaches more than 96%.
Embodiment 2
In catecholborane production process, make reducing agent using borane dimethylsulf iotade, in course of reaction, produce hydrogen, hydrogen simultaneously
Form tail gas with dimethyl sulphide steam, detect before vent gas treatment, dynamic content 0.1kg/m of dimethyl sulphide3～0.3kg/m3, tail
Gas velocity 0.8m3/h.The above-mentioned tail gas containing dimethyl sulphide is passed through the reactor with stirring, 2%～10% calcium hypochlorite aqueous solution is made
For oxidant of degrading, breather is passed through below liquid level, and is lowered the temperature by temperature-reducing medium, and the tail gas containing dimethyl sulphide is through degraded oxygen
After agent absorbs (for 10:1, reaction temperature is 25 DEG C～35 DEG C to the weight of described degraded oxidant and the tail gas containing dimethyl sulphide ratio),
Discharged by exhaustor.By exhaustor expellant gas, dimethyl sulphide content is less than 0.005kg/m after testing3, discharge dynamic model
Enclose for 0.0004～0.005kg/h, the 0.33～0.52kg/h specifying far below gb14554-93 " emission standard for odor pollutants ",
Meet discharge standard.Dimethyl sulphide removal efficiency reaches more than 95%.
Embodiment 3
In catecholborane production process, make reducing agent using borane dimethylsulf iotade, in course of reaction, produce hydrogen, hydrogen simultaneously
Form tail gas with dimethyl sulphide steam, detect before vent gas treatment, dynamic content 0.1kg/m of dimethyl sulphide3～0.3kg/m3, tail
Gas velocity 0.8m3/h.Tail gas containing dimethyl sulphide is passed through storage tank, aqueous hydrogen peroxide solution is passed through as degraded oxidant, breather
Below liquid level, and lowered the temperature by temperature-reducing medium, (the described degraded oxidation after degraded oxidant absorbs of the tail gas containing dimethyl sulphide
For 5:1, reaction temperature is 15 DEG C～25 DEG C to the weight of agent and the tail gas containing dimethyl sulphide ratio), discharged by exhaustor.By row
Dimethyl sulphide content is less than 0.003kg/m to trachea expellant gas after testing3, discharge dynamic range is 0.0002～0.003kg/h,
0.33～the 0.52kg/h specifying far below gb14554-93 " emission standard for odor pollutants ", meets discharge standard.Dimethyl sulphide
Removal efficiency reaches more than 96%.
Claims (10)
1. a kind of tail gas absorption method containing dimethyl sulphide is it is characterised in that comprise the steps:
Step one: oxidant of degrading adds in air-washer；
Step 2: borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas are passed in the air-washer described in step one；
Step 3: in air-washer, borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas are aoxidized with degraded oxidant
Degradation reaction, reaches discharge standard.
2. the method for claim 1 is it is characterised in that increase following steps after step 3 oxidative degradation:
Air-washer bottom remaining degraded oxidant pass through circulate pump circulation, and lower the temperature by condenser be passed through again air-washer circulate
Using the degraded oxidant failing is discharged by the waste liquid discharge pipe being connected with condenser.
3. method as claimed in claim 2 is it is characterised in that described be cooled to 35 DEG C by condenser and be passed through again below
Air-washer recycles.
4. the method for claim 1 is it is characterised in that described air-washer is pickling tower, reactor or storage tank；
In step 2, borane dimethylsulf iotade reaction end gas or dimethyl sulphide tail gas are passed into described in step one by drying tower, anti-tank switching
Air-washer in.
5. the method for claim 1 is it is characterised in that in step 3, described borane dimethylsulf iotade reaction end gas or two
Methyl sulfide tail gas is sufficiently mixed in air-washer with degraded oxidant, carries out oxidative degradation；Described degraded oxidant and institute
Stating borane dimethylsulf iotade reaction end gas or the weight of dimethyl sulphide tail gas is 100:1～5:1 than scope, and reaction temperature is 5～35 DEG C.
6. the method for claim 1 is it is characterised in that described degraded oxidant is the warp referring to cacodyl oxide thioether
Ji oxidant, comprising: 5%～10% aqueous sodium hypochlorite solution or alcoholic solution, 2%～10% calcium hypochlorite aqueous solution or alcoholic solution, double
Oxygen water aqueous solution.
7. method as claimed in claim 6 is it is characterised in that described degraded oxidant is 5%～10% aqueous sodium hypochlorite solution
Or alcoholic solution.
8. a kind of device for absorbing tail gas containing dimethyl sulphide of employing claim 1 methods described is it is characterised in that include: two
Methyl sulfide offgas duct, air-washer, gas-liquid separator, exhaustor, degraded oxidant input pipe；Described dimethyl sulphide offgas duct,
Described degraded oxidant input pipe and described exhaustor are connected with described air-washer respectively, in described exhaustor and described gas washing dress
It is provided with described gas-liquid separator between putting.
9. device as claimed in claim 8 is it is characterised in that by the described degraded degraded oxidant that is passed through of oxidant input pipe
Described air-washer is passed through by feed pump；The remaining degraded in described air-washer bottom oxidant passes through to circulate pump circulation, and leads to
Cross condenser cooling to be passed through air-washer again and recycle；Dimethyl sulphide tail gas in described dimethyl sulphide offgas duct passes through drying
Tower, anti-tank switching are passed in air-washer.
10. device as claimed in claim 8 is it is characterised in that described air-washer is pickling tower, reactor or storage tank；
Described degraded oxidant is the economic oxidant referring to cacodyl oxide thioether, comprising: 5%～10% aqueous sodium hypochlorite solution or alcohol
Solution, 2%～10% calcium hypochlorite aqueous solution or alcoholic solution, aqueous hydrogen peroxide solution.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510433719.9A CN106362565A (en) | 2015-07-22 | 2015-07-22 | Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510433719.9A CN106362565A (en) | 2015-07-22 | 2015-07-22 | Dimethyl sulfide-containing tail gas absorption apparatus and dimethyl sulfide-containing tail gas absorption method |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331075A (en) * | 2013-07-12 | 2013-10-02 | 湖北兴发化工集团股份有限公司 | Tail gas absorption method and tail gas absorption device of dimethyl sulfide |
| CN104292239A (en) * | 2014-09-30 | 2015-01-21 | 大连九信生物化工科技有限公司 | Method for removing by-product dimethyl sulfide in moxidectin production process |
-
2015
- 2015-07-22 CN CN201510433719.9A patent/CN106362565A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103331075A (en) * | 2013-07-12 | 2013-10-02 | 湖北兴发化工集团股份有限公司 | Tail gas absorption method and tail gas absorption device of dimethyl sulfide |
| CN104292239A (en) * | 2014-09-30 | 2015-01-21 | 大连九信生物化工科技有限公司 | Method for removing by-product dimethyl sulfide in moxidectin production process |
Non-Patent Citations (1)
| Title |
|---|
| 龚元新: "二甲硫醚废气的综合处理技术", 《宁波化工》 * |
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Inventor after: Zhao Hui Inventor after: Zhang Xu Inventor before: Zhao Hui Inventor before: Zhang Xu Inventor before: Li Kai |
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Application publication date: 20170201 |