CN206199286U - The process units and its production system of Sodium Dimethyldithiocarbamate - Google Patents
The process units and its production system of Sodium Dimethyldithiocarbamate Download PDFInfo
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- CN206199286U CN206199286U CN201621304041.0U CN201621304041U CN206199286U CN 206199286 U CN206199286 U CN 206199286U CN 201621304041 U CN201621304041 U CN 201621304041U CN 206199286 U CN206199286 U CN 206199286U
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides the process units and its production system of a kind of Sodium Dimethyldithiocarbamate, belongs to chemical products preparation field.The process units includes：Reactor, reactor have relatively closed reaction chamber, reactor have optionally connected with reaction chamber for accessing CS2First interface, the second interface for accessing NaOH solution, the 3rd interface for accessing dimethylamine, for accessing N2The 4th interface and discharge gate；Agitating device, the stirring structure of agitating device is arranged in reaction chamber；With the cooling device for cooling down reactor.The production system includes above-mentioned process units and automation control system.This process units and production system, safety and environmental protection, energy consumption are low.
Description
Technical field
The utility model is related to chemical products preparation field, a kind of process units in particular to Sodium Dimethyldithiocarbamate and its
Production system.
Background technology
Sodium Dimethyldithiocarbamate (Sodium Dimethyldithiocarbamate, SDD), solid product is two hydrates, molecule
Formula is (CH3)2NC(S)SNa·2H2O, chemical name is SDD.Sodium Dimethyldithiocarbamate is widely used, such as exists
Rubber industry is used as terminator, the vulcanization accelerator of rubber of emulsion polymerized styrene butadiene rubber or styrene-butadiene latex；In Treatment of Industrial Water
In can be used as Biocidal algae-killing agent and heavy metal chelating agent；It is used as Biocidal algae-killing agent in oil and paper industry；It is used in agricultural
Production insecticide such as thiram, ziram etc.；It is used as the ore dressing medicine of zinc, the removal of impurities of manganese hydrometallurgy, copper mine, kustelite etc. in mining industry
Agent.Additionally, Sodium Dimethyldithiocarbamate is also a kind of heavy metal precipitator for commonly using, be widely used in the Industrial Waste Water Treatments containing heavy metal,
The harmless treatment of city garbage burning flying ash, the heavy metal stabilization treatment of solid waste, the soil remediation of heavy metal pollution
Deng, therefore Sodium Dimethyldithiocarbamate is a kind of very important thiocarbamate veriety.
At present, Sodium Dimethyldithiocarbamate mainly uses following technique productions：By CS2It is added dropwise in 40% dimethylamine (DMA) solution, 30-
Synthetic reaction is carried out in the mixture of 50%NaOH solution compositions and obtains the Sodium Dimethyldithiocarbamate aqueous solution.This traditional handicraft is generally using spacious
The enamel or stainless steel stirred autoclave of open type, produce Sodium Dimethyldithiocarbamate at ambient pressure.In this traditional handicraft, easily cause volatile
Dimethylamine and CS2Etc. inflammable and explosive toxic gas leakage in atmosphere, air pollution is caused, while there is also greatly peace
Full hidden danger.
Utility model content
The utility model provides the process units and its production system of a kind of Sodium Dimethyldithiocarbamate, it is intended to improves Sodium Dimethyldithiocarbamate and produced
The problem of safety problem and environmental pollution in journey.
What the utility model was realized in：
A kind of process units of Sodium Dimethyldithiocarbamate, it includes：
Reactor, reactor has relatively closed reaction chamber, and reactor has the use for optionally being connected with reaction chamber
In access CS2First interface, the second interface for accessing NaOH solution, the 3rd interface for accessing dimethylamine, be used for
Access N2The 4th interface and discharge gate；
Agitating device, the stirring structure of agitating device is arranged in reaction chamber；
With the cooling device for cooling down reactor.
A kind of production system of Sodium Dimethyldithiocarbamate, the production system includes automation control system and above-mentioned process units.
The beneficial effects of the utility model are：
The process units that the utility model is obtained by above-mentioned design, by accessing diformazan in the reaction chamber to reactor
Amine, CS2And NaOH solution, these three raw materials is reacted as follows in reaction chamber：
(CH3)2NH+NaOH+CS2=(CH3)2NC(S)SNa+H2O(Ⅰ)
This process units reaction chamber during reaction is in relative air-tight state, so as to avoid the CS in raw material2With
Dimethylamine volatilizees and excessive into air because temperature is high, due to gaseous CS2Being with dimethylamine inflammable and explosive has poison gas
Body, therefore use the process units, can significantly reduce the problem of environmental pollution produced in Sodium Dimethyldithiocarbamate production process, and avoid by
In CS2It is excessive with dimethylamine and trigger security incident.Meanwhile, the reaction I is reacted for very exothermic, is passed through in the reaction unit
The setting of agitating device and cooling device, effectively can remove the reaction heat in reactor, it is ensured that production can enter safely
OK.
During being produced using the carrying out of this process units, by regulating and controlling dimethylamine, CS2And NaOH solution this
The order of addition and addition of three kinds of raw materials control reaction speed, because reaction I is carried out under air-tight state, the synthesis
Reaction is substantially quantitatively carried out, and high income is up to more than 99%.Whole course of reaction is all in N2Carried out under protection, reaction temperature
Up to 95 DEG C of degree, steady safety.Simultaneously as reaction temperature is high, even in reaction chamber in last resulting synthesis material
The mass fraction of Sodium Dimethyldithiocarbamate is up to more than 70%, there will not be the precipitation of Sodium Dimethyldithiocarbamate crystal and prevents reaction from being smoothed out.Additionally, highly concentrated
The synthesis material of degree by way of being concentrated by evaporation this power consumption, and only by direct crystallisation by cooling, need not just can obtain purity high
Up to more than 96% Sodium Dimethyldithiocarbamate solid product.
Brief description of the drawings
In order to illustrate more clearly of the technical scheme of the utility model implementation method, below will be to being wanted needed for implementation method
The accompanying drawing for using is briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore not
The restriction to scope is should be considered as, for those of ordinary skill in the art, on the premise of not paying creative work,
Other related accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the process units of the first Sodium Dimethyldithiocarbamate that the utility model implementation method is provided；
Fig. 2 is the structural representation of the process units of second Sodium Dimethyldithiocarbamate that the utility model implementation method is provided；
Fig. 3 is the structural representation of the process units of the third Sodium Dimethyldithiocarbamate that the utility model implementation method is provided；
Fig. 4 is the 4th kind of structural representation of the process units of Sodium Dimethyldithiocarbamate that the utility model implementation method is provided.
Icon：100- process units；110- reactors；111- reaction chambers；112- first interfaces；113- second interfaces；
The interfaces of 114- the 3rd；The interfaces of 115- the 4th；116- discharge gates；117- liquid distribution troughs；118- blow-down pipes；120- agitating devices；
121- stirring structures；130- cooling devices；131- chucks；133- coil pipes；134- coolant inlets；135- cooling liquid outlets；
140- synthesis material collecting tanks；150- delivery pumps；160- valve bodies；200- process units；250- mother liquor fluid reservoirs；300- production dresses
Put；360- exhaust treatment systems；361- tail gas absorption tanks；362- agitators；363- drains；364- blast pipes；365- gases
Distributor；400- process units；470- mother liquor fluid reservoirs；The drainage conduits of 471- first；480- exhaust treatment systems；481- tail gas is inhaled
Closed cans；The drainage conduits of 482- second.
Specific embodiment
To make the purpose, technical scheme and advantage of the utility model implementation method clearer, below in conjunction with this practicality
Accompanying drawing in new implementation method, is clearly and completely described to the technical scheme in the utility model implementation method, shows
So, described implementation method is a part of implementation method of the utility model, rather than whole implementation methods.Based on this practicality
Implementation method in new, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Implementation method, belongs to the scope of the utility model protection.Therefore, implementation of the present utility model below to providing in the accompanying drawings
The detailed description of mode is not intended to limit claimed scope of the present utility model, but is merely representative of of the present utility model
Selected implementation method.Based on the implementation method in the utility model, those of ordinary skill in the art are not making creative labor
The every other implementation method obtained under the premise of dynamic, belongs to the scope of the utility model protection.
In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outward ",
The orientation or position relationship of the instructions such as " clockwise ", " counterclockwise " be based on orientation shown in the drawings or position relationship, be only for
Be easy to description the utility model and simplify describe, rather than indicate imply signified equipment or element must have it is specific
Orientation, with specific azimuth configuration and operation, therefore it is not intended that to limitation of the present utility model.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In description of the present utility model, " multiple " is meant that two or two
More than, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integrally；Can be
Mechanically connect, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or two interaction relationships of element.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature second feature it " on " or it
D score can include the first and second feature directly contacts, it is also possible to including the first and second features not be directly contact but logical
The other characterisation contact crossed between them.And, fisrt feature second feature " on ", " top " and " above " include the
One feature is directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.First is special
Levy second feature " under ", " lower section " and " below " include fisrt feature immediately below second feature and obliquely downward, or only
Represent that fisrt feature level height is less than second feature.
Embodiment 1, referring to figs. 1 to shown in Fig. 4,
The present embodiment provides a kind of process units 100 of Sodium Dimethyldithiocarbamate, as shown in figure 1, the process units 100 is used for diformazan
Amine, CS2And NaOH solution these three raw materials input reaction, the Sodium Dimethyldithiocarbamate high to obtain purity.
The process units 100 includes reactor 110, and reactor 110 has relatively closed reaction chamber 111, and generation good fortune is beautiful
What the reaction of sodium was just carried out in reaction chamber 111.Reactor 110 has four interfaces being connected with reaction chamber 111, that is, be used for
Access CS2First interface 112, the second interface 113 for accessing NaOH solution, the 3rd interface for accessing dimethylamine
114 and for accessing N2The 4th interface 115.Wherein, first interface 112 need to be inserted into reaction chamber 111 below liquid level.Together
When, also there is discharge gate 116 on reactor 110, the synthesis material that will can be obtained in reaction chamber 111 by discharge gate 116 is discharged.
Valve body 160 is mounted on this four interfaces and discharge gate 116, the shape that can be carried out according to reaction by valve body 160
State carrys out selective make this four interfaces and discharge gate 116 and is in unlatching or closure state, and reaction chamber 111 is made with this anti-
Relatively closed state is presented during answering.3rd interface 114 is, for accessing dimethylamine, generally to react the dimethylamine for using
Be in a liquid state shape, can be in N2Pressure under be passed through in reaction chamber 111, CS2It is liquid, reaction directly can be accessed to by delivery pump 150
In chamber 111.Additionally, the mass fraction of NaOH is 50% in the NaOH solution for using in the present reaction, also can directly by conveying
Pump 150 is accessed in reaction chamber 111.In order to optimize the pipe design in the process units 100, the 3rd interface 114 is arranged at
The bottom of reactor 110, while first interface 112, the interface 115 of second interface 113 and the 4th may be contained within into reactor 110
Top.Additionally, the top of reactor 110 is additionally provided with the blow-down pipe 118 connected with the selectivity of reaction chamber 111, for that will react
Gauge pressure in kettle 110 is down to below 0.01Mpa.
Preferably, the process units 100 also includes synthesis material collecting tank 140, synthesis material collecting tank 140 and reactor 110
It is connected, i.e., the entrance of synthesis material collecting tank 140 is connected with the discharge gate 116 of reactor 110.After the completion of question response, will react
The synthesis material formed in chamber 111 is drained into synthesis material collecting tank 140 by discharge gate 116, then carries out cooling knot to synthesis material
Crystalline substance, Sodium Dimethyldithiocarbamate solid product (purity of Sodium Dimethyldithiocarbamate is more than 96%) and the crystalline mother solution (matter of Sodium Dimethyldithiocarbamate are obtained by separation of solid and liquid
60%) amount fraction is about.
Process units 100 also includes agitating device 120, and agitating device 120 is used to that reaction mass to be well mixed and be accelerated
The radiating rate of reaction heat.Agitating device 120 includes drive mechanism (not shown) and stirring structure 121, and stirring structure 121 is set
In in reaction chamber 111.Stirring structure 121 includes rotating shaft and stirring slurry, and in the presence of drive mechanism, rotating shaft drives stirring slurry to turn
It is dynamic, the material in reaction chamber 111 is well mixed.
Process units 100 also includes cooling device 130, and cooling device 130 is sheathed on the outer wall of reactor 110, by cold
But the reaction heat that device 130 will can be produced in synthetic reaction is quickly removed, it is ensured that reaction safety is carried out.Cooling device 130 is wrapped
Chuck 131 and coil pipe 133 are included, chuck 131 is sheathed on the outer wall of reactor 110, and between being left and the outer wall of reactor 110 between
Gap.Chuck 131 has coolant inlet 134 and cooling liquid outlet 135, while in order to improve cooling effect, the cooling of chuck 131
Height of the height of liquid entrance 134 less than cooling liquid outlet 135.Coil pipe 133 is arranged at the inwall of reactor 110, and helically
Shape is coiled along the inwall of reactor 110.Coil pipe 133 also has coolant inlet 134 and cooling liquid outlet 135.The choosing of coolant
Selecting can have various, such as refrigerated brine, cooling water or tap water at normal temperature.
The method that Sodium Dimethyldithiocarbamate is produced by process units 100 is：
First use N2Air in replacement reaction kettle 110, after opening agitating device 120 and cooling device 130, then will be a certain amount of
Mass fraction be that 40~50% dimethylamine solution is passed through in reactor 110, after dimethylamine be added to it is a certain amount of after, by CS2
It is passed through in reactor 110 and starts reaction with the dimethylamine in reactor 110, then NaOH solution is passed through in reactor 110
Reacted.
By accessing dimethylamine, CS in the reaction chamber 111 to reactor 1102And NaOH solution, these three raw materials is existed
Reacted as follows in reaction chamber 111：
(CH3)2NH+NaOH+CS2=(CH3)2NC(S)SNa+H2O(Ⅰ)
The reaction chamber 111 during reaction of process units 100 is in relative air-tight state, so as to avoid the CS in raw material2
Volatilized and excessive into air because temperature is high with dimethylamine, due to gaseous CS2It is with dimethylamine inflammable and explosive poisonous
Gas, therefore the process units 100 is used, the problem of environmental pollution produced in Sodium Dimethyldithiocarbamate production process can be significantly reduced, and
Avoid due to CS2It is excessive with dimethylamine and trigger security incident.Meanwhile, the reaction I is reacted for very exothermic, the process units
By the setting of agitating device 120 and cooling device 130 in 100, effectively the reaction heat in reactor 110 can be removed,
Ensure that production can be carried out safely.
In the production method using this process units 100, by regulating and controlling dimethylamine, CS2And NaOH solution this three
The order of addition and addition of raw material is planted to control reaction speed.It is more preferred, first it is passed through in past reaction chamber 111 a certain amount of
Dimethylamine, it is possible to increase the concentration of dimethylamine in initial reaction stage reaction system, is conducive to improving the reaction speed of initial reaction stage.Together
When, add the NaOH and CS in reactor 1102Mol ratio be 1：0.9~1.1, the mol ratio is preferably 1：1；NaOH's adds
Material speed is according to CS2Flow velocity adjust, i.e., the CS in reaction chamber 111 is added in the unit interval2It is anti-with being added in the unit interval
The mol ratio for answering the NaOH in chamber 111 is 1：0.9~1.1.The flow and flow velocity of these three materials can be by being arranged at these three
Flowmeter (not shown) in the feeding tube of material is adjusted.Additionally, the mixing velocity in order to accelerate material, production dress
Put 100 and the bottom of reaction chamber 111 is provided with liquid distribution trough 117.
In traditional open type synthesis under normal pressure production technology, synthesis reaction temperature have to be lower than 35 DEG C, this be mainly by
In dimethylamine and CS2Low boiling point, inflammable and explosive and reaction therebetween be very exothermic reaction, if using traditional handicraft
In normal pressure open type reactor 110, when temperature is more than 35 DEG C, easily trigger security incident.Meanwhile, after traditional handicraft reaction
The mass fraction of the hydrate of Sodium Dimethyldithiocarbamate two is usually less than 60% in the resulting Sodium Dimethyldithiocarbamate aqueous solution, if the aquation of Sodium Dimethyldithiocarbamate two
The mass fraction of compound is higher than 60%, then will have substantial amounts of Sodium Dimethyldithiocarbamate crystal during the course of the reaction and separate out, and is on the one hand separated out
Crystal suspension makes synthesis material be changed into thick slurry in reaction system, is unfavorable for being smoothed out for reaction；On the other hand,
The crystal of precipitation is attached to heat exchange surface, heat-transfer effect is deteriorated, or even reaction is carried out.
And the process units 100 and production method in the present embodiment are used, because reaction I is carried out under air-tight state
, the synthetic reaction is substantially quantitatively to carry out, and high income is up to more than 99%.This whole course of reaction is all in N2Enter under protection
Capable, even if up to 95 DEG C of reaction temperature, it is also possible to ensure the steady safety of production.Because the process units 100 can bear 95
DEG C reaction temperature, therefore only need to be passed through normal-temperature water toward chuck 131 and coil pipe 133 when being lowered the temperature using cooling device 130
, and without needing to can be only achieved the effect for removing reaction heat using cryogenic freezing salt solution as traditional handicraft, cancel cold
Freeze the process of mechanism cold, averagely produce about 150 degree of the power consumption that Sodium Dimethyldithiocarbamate product per ton saves refrigerator, meanwhile, through heat exchange after, it is cold
But the water temperature in device 130 at the cooling liquid outlet 135 of chuck 131 and coil pipe 133 may be up to 85 DEG C, produces Sodium Dimethyldithiocarbamate per ton and produces
Product can produce hot water 4m3, it is available for full factory domestic hot-water and winter heating, it can be seen that the energy-saving effect of process units 100 is notable.
Further, since reaction temperature is high, it is last even in reaction chamber 111 obtained by synthesis material in Sodium Dimethyldithiocarbamate quality
Fraction is up to more than 70%, there will not be Sodium Dimethyldithiocarbamate crystal and separates out the phenomenon generation for preventing reaction from being smoothed out.The conjunction of high concentration
Being concentrated by evaporation by way of this power consumption, and only by direct crystallisation by cooling, high purity 96% need not be just can obtain into material
Sodium Dimethyldithiocarbamate solid product above, the mass fraction of Sodium Dimethyldithiocarbamate can be used for 60% or so in the crystalline mother solution of remaining after crystallization
It is deployed into aqua product.Because without the condensed water for producing is concentrated by evaporation, whole technique realizes zero-emission, efficiently solves Fu Mei
Problem of environmental pollution in sodium production process.
Further, in order that with the dimethylamine of high purity 99.8%, and enter the initial reaction in the reaction system
Capable is more smooth, and further improves raw material CS2With the utilization rate of dimethylamine, while also can sufficiently utilize reaction system
The crystalline mother solution of middle generation, inventor is further optimized to the process units 100, and research and development obtain process units
200。
As shown in Fig. 2 process units 200 also includes mother liquor fluid reservoir 250, mother liquor fluid reservoir 250 is anti-with reactor 110
Chamber 111 is answered to be connected.Equipped with the material in crystalline mother solution, i.e. synthesis material collecting tank 140 through supercooling knot in mother liquor fluid reservoir 250
The crystalline mother solution collected after crystalline substance, the wherein mass fraction of Sodium Dimethyldithiocarbamate are 60% or so.
Before starting the reaction, i.e., with N2Before air in replacement reaction kettle 110, first by the mother liquor fluid reservoir of a part
Crystalline mother solution in 250 is passed through in reactor 110, and crystalline mother solution can replace water as reaction medium, by adjusting crystalline mother solution
Amount, the concentration of Sodium Dimethyldithiocarbamate in finally obtained synthesis material can be controlled.
Crystalline mother solution participates in reaction in reentering reactor 110, the dimethylamine and a small amount of CS mixed in crystalline mother solution2
Reaction can be again participated in as reactant, CS is thus improved2It is effective to improve with the utilization rate of dimethylamine, it is to avoid material waste
The utilization rate of raw material.Meanwhile, by after the circular response again of crystalline mother solution, wherein the mass fraction of Sodium Dimethyldithiocarbamate is left by 60%
Upper right is raised to 70%, is conducive to obtaining more Sodium Dimethyldithiocarbamate solid products by crystallisation by cooling, while being also avoided that crystalline mother solution
Poisonous waste water is consumed energy and produced when being concentrated by evaporation.
This process units 200 can safely and conveniently use the dimethylamine of purity 99.8% as raw material very much, and
In order to reduce the volatilization of dimethylamine, ensure the security of reaction in traditional handicraft, the dimethylamine that mass fraction is 40% can only be used
The aqueous solution is reacted.Use quality fraction is 99.8% dimethylamine and use quality fraction is 40% dimethylamine agueous solution
Than, on the one hand, considerably reduce the cost of transportation of dimethylamine；On the other hand, due to molten not with dimethylamine in reaction system
The substantial amounts of water that liquid band is come, need not be concentrated by evaporation during production Sodium Dimethyldithiocarbamate solid product, directly can obtain Sodium Dimethyldithiocarbamate by crystallisation by cooling
Solid product.The standard coal that Sodium Dimethyldithiocarbamate solid product per ton can save 0.7 ton is produced, energy-saving effect is notable.Further, since not having
The generation of evaporation condensed water, solves the sewage handling problem in puzzlement Sodium Dimethyldithiocarbamate production.
Further, in order to solve the problems, such as the exhaust emissions in Sodium Dimethyldithiocarbamate production, zero-emission is achieved, while improving former
The utilization rate of material, inventor is further optimized to the process units 100, and research and development have obtained process units 300.
Process units 300 is additionally arranged exhaust treatment system 360.Exhaust treatment system 360 includes tail gas absorption tank 361 and row
Tracheae 364.Tail gas absorption tank 361 has drain 363, and drain 363 causes that tail gas absorption tank 361 is connected with ambient atmosphere
It is logical.Tail gas absorption liquid is housed in tail gas absorption tank 361.The arrival end of blast pipe 364 is connected with the reaction chamber 111 of reactor 110
Logical, the port of export of blast pipe 364 is connected with tail gas absorption tank 361, i.e., tail gas absorption tank 361 passes through blast pipe 364 and reaction chamber
111 are connected.
After the completion of question response, the synthesis material in reactor 110 is delivered in synthesis material collecting tank 140, is now reacted
The pressure of kettle 110 is about 0.2Mpa；Then make the gas being located in reactor 110, tail gas absorption liquid is passed through by blast pipe 364
In carry out vent gas treatment.After the gauge pressure of reactor 110 is down to below 0.01Mpa, illustrate that the tail gas in reactor 110 has been discharged
Completely, vent gas treatment terminates.After tail gas in reactor 110 is through treatment, dimethylamine therein and CS2Inhaled by tail gas absorption liquid
Receive, finally only contain nitrogen from the tail gas of the discharge of drain 363, efficiently solve the problems, such as tail gas pollution environment.
Agitator 362 and gas distributor 365 are provided with order to improve in the absorption efficiency of tail gas, tail gas absorption tank 361.
Preferably, tail gas absorption tank 361 is a stainless steel cauldron equipped with agitator 362, is offered on tail gas absorption tank 361 and put
Eat dishes without rice or wine 363, and blast pipe 364 is installed, the inside of tail gas absorption tank 361 is equipped with gas distributor 365.Opening blast pipe
Before 364, first agitator 362 and gas distributor 365 are opened, so that the CS in reactor 1102Quickly dissolved with dimethylamine
In tail gas absorption liquid, vent gas treatment efficiency is improved.By this exhaust treatment system 360, the volatilization in reaction can be avoided
Dimethylamine and CS2Entered in air Deng toxic gas, realize zero-emission, solve the environmental pollution in puzzlement Sodium Dimethyldithiocarbamate production
Problem.
Further, for the CS in making full use of crystalline mother solution and tail gas2And dimethylamine, inventor is to the production
Device 300 is further optimized, and research and development have obtained process units 400.
Process units 400 is provided with exhaust treatment system 480 and mother liquor fluid reservoir 470 simultaneously, and in exhaust treatment system
480 and mother liquor fluid reservoir 470 directly form Recycling Mother Solution loop, i.e. mother liquor fluid reservoir 470 by the first drainage conduit 471 and tail gas
The charging aperture connection of tourie 481, tail gas absorption tank 481 is connected by the second drainage conduit 482 with the charging aperture of mother liquor fluid reservoir 470
It is logical.Tail gas absorption liquid in tail gas absorption tank 481 is crystalline mother solution.
Before starting the reaction, i.e., with N2Before air in replacement reaction kettle 110, first the crystalline mother solution of a part is passed through
In reactor 110, synthetic reaction is participated in as the bed material of initial reaction stage, then the crystalline mother solution of another part is passed through tail gas absorption
Used as tail gas absorption liquid in tank 481.
Crystalline mother solution participates in reaction in reentering reactor 110, the dimethylamine and a small amount of CS mixed in crystalline mother solution2
Reaction can be again participated in as reactant, CS is thus improved2It is effective to improve with the utilization rate of dimethylamine, it is to avoid material waste
The utilization rate of raw material.
Before starting the reaction, the crystalline mother solution in mother liquor fluid reservoir 250 is drained into tail gas absorption by the first drainage conduit 471
In tank 481, the CS in tail gas is absorbed as tail gas absorption liquid2And dimethylamine；Gauge pressure in question response kettle 110 is down to
Below 0.01MPa, then illustrate that the tail gas in reactor 110 is emptied substantially, now again that the crystallization in tail gas absorption tank 481 is female
Liquid is entered in mother liquor fluid reservoir 470 by the second drainage conduit 482, and the crystalline mother solution in mother liquor fluid reservoir 470 just can enter next
In the reaction system of batch, so as to by the CS in tail gas2Also it is reintroduced back to dimethylamine in reactor 110 and is reacted, by thing
The utilization rate of material brings up to more than 99%.
For the ease of control CS2, dimethylamine and NaOH solution these three materials enter the amount and speed of reaction system, should
Process units 100 also includes dimethylamine fluid reservoir (not shown), CS2Fluid reservoir (not shown) and NaOH fluid reservoir (not shown).
Wherein, dimethylamine fluid reservoir is connected with the 3rd interface 114, is entered in reactor 110 by the 3rd interface 114；NaOH liquid storages
Tank is connected with second interface 113, and interior, CS in reactor 110 is entered by second interface 1132Fluid reservoir and first interface 112
It is connected, is entered in reactor 110 by first interface 112, is reacted.
Dimethylamine fluid reservoir, CS2Fluid reservoir and NaOH fluid reservoirs these three fluid reservoirs can be measuring tank, in order to more
Flow is accurately controlled, liquid level gauge is mounted in these three fluid reservoirs.Preferably, pacify in the discharge line of these three materials
Can be mass flowmenter or volume flowmeter equipped with flowmeter, dimethylamine, CS are regulated and controled by flowmeter2With adding for NaOH
Enter amount and charging rate, reaction speed is controlled with this.
The utility model additionally provides a kind of production system of Sodium Dimethyldithiocarbamate, and production system includes automation control system and upper
State process units 100,200,300,400.By automation control system, dimethylamine, CS are accurately measured using three flowmeters2
With the addition and charging rate of NaOH, the reaction speed in circulating reaction system is controlled with this.Additionally, Automated condtrol system
System can also regulate and control reaction temperature and pressure and other parameters.
Preferred embodiment of the present utility model is the foregoing is only, the utility model is not limited to, for
For those skilled in the art, the utility model can have various modifications and variations.It is all in spirit of the present utility model and former
Within then, any modification, equivalent substitution and improvements made etc. should be included within protection domain of the present utility model.
Claims (10)
1. a kind of process units of Sodium Dimethyldithiocarbamate, it is characterised in that it includes：
Reactor, the reactor have relatively closed reaction chamber, the reactor have optionally with the reaction chamber
Connection for accessing CS2First interface, the second interface for accessing NaOH solution, connect for accessing the 3rd of dimethylamine the
Mouthful, for accessing N2The 4th interface and discharge gate；
Agitating device, the stirring structure of the agitating device is arranged in the reaction chamber；
With the cooling device for cooling down the reactor.
2. the process units of Sodium Dimethyldithiocarbamate according to claim 1, it is characterised in that the cooling device includes chuck and disk
Pipe, the chuck is sheathed on the outer wall of the reactor, and the coil pipe is arranged at the inwall of the reactor, the chuck and institute
State coil pipe and be respectively provided with coolant inlet and cooling liquid outlet.
3. the process units of Sodium Dimethyldithiocarbamate according to claim 1, it is characterised in that the bottom of the reaction chamber is provided with liquid
Body distributor, the 3rd interface is arranged at the bottom of the reactor, the first interface, the second interface and described
Four interfaces may be contained within the top of the reactor.
4. the process units of Sodium Dimethyldithiocarbamate according to claim 1, it is characterised in that the process units is also stored up including mother liquor
Flow container, the mother liquor fluid reservoir is connected with the reactor.
5. the process units of Sodium Dimethyldithiocarbamate according to claim 3, it is characterised in that the process units also includes synthesis material
Collecting tank, the synthesis material collecting tank is connected with the discharge gate.
6. the process units of Sodium Dimethyldithiocarbamate according to claim 4, it is characterised in that the process units also includes at tail gas
Reason system, the exhaust treatment system includes tail gas absorption tank and blast pipe, the arrival end of the blast pipe and the reactor
It is connected, the port of export of the blast pipe is connected with the tail gas absorption tank.
7. the process units of Sodium Dimethyldithiocarbamate according to claim 6, it is characterised in that be provided with the tail gas absorption tank and stirred
Mix device and gas distributor.
8. the process units of Sodium Dimethyldithiocarbamate according to claim 7, it is characterised in that the mother liquor fluid reservoir and the tail gas
Tourie is connected.
9. the process units of Sodium Dimethyldithiocarbamate according to claim 8, it is characterised in that the mother liquor fluid reservoir by with its bottom
The first drainage conduit that portion is connected is connected with the charging aperture of tail gas absorption tank, and the tail gas absorption pipe is connected by with its bottom
The second drainage conduit connected with the charging aperture of the mother liquor fluid reservoir, form Recycling Mother Solution loop.
10. a kind of production system of Sodium Dimethyldithiocarbamate, it is characterised in that the production system includes automation control system, Yi Jiquan
Profit requires the process units any one of 1-9.
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| CN106423027A (en) * | 2016-11-30 | 2017-02-22 | 湖南福尔程环保科技有限公司 | Production device and production method for sodium dimethyl dithiocarbamate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106423027A (en) * | 2016-11-30 | 2017-02-22 | 湖南福尔程环保科技有限公司 | Production device and production method for sodium dimethyl dithiocarbamate |
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