Chloroform retrieving arrangement in a kind of 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride production process
Technical field
The utility model relates to a kind of chloroform retrieving arrangement, the retrieving arrangement of the chloroform that uses when reclaim producing cleaning catalyst in 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride process.
Background technology
Chloroform is a kind of organic solvent commonly used in the industrial production, under illumination, can produce the phosgene of severe toxicity.If directly enter environment, can cause great pollution.But lack retrieving arrangement and treatment process at present to chloroform.There is document to point out and to reclaim chloroform with the distillatory method, can reaches good effect.A kind of water distilling apparatus commonly used in the enterprise is a water distillation apparatus, is used for making zero(ppm) water.The catalyzer of producing in 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride process is recycle, need clean catalyzer with chloroform in the working cycle, and chloroform has severe toxicity, if directly be discharged in the environment, can cause very big pollution.
Summary of the invention
The device that the utility model provides can distill recovery to the chloroform after using, and reduces the pollution to environment.
The utility model solves the technical scheme that its technical problem adopted: chloroform retrieving arrangement in a kind of 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride production process comprises water distilling apparatus and collection device.Water distilling apparatus comprises liquid separatnig tube, water distillation apparatus, chloroform outlet, wastewater outlet, nichrome wire,, thermopair, temperature controller, viewing window, first step condensation, second stage condensation, cooling water outlet, cooling water inlet and condensate outlet.Collection device comprises phlegma inlet, receiving flask and tail gas bottle.Liquid separatnig tube links to each other with water distillation apparatus through the chloroform outlet, and there is a wastewater outlet liquid separatnig tube below.Nichrome wire and thermopair are equipped with in the water distillation apparatus bottom.Thermopair links to each other with temperature controller.Viewing window is arranged on the water distillation apparatus.The water distillation apparatus top is connected with first step condensation and second stage condensation.Condensing water inlet and condensation-water drain are arranged in the first step condensation; Condensing water inlet and condensation-water drain are arranged in the condensation of the second stage.Second stage condensation end is a condensate outlet, and condensate outlet links to each other with the phlegma inlet, is connected with receiving flask and tail gas bottle behind the phlegma inlet.In the tail gas bottle water is housed.
The beneficial effect of the utility model is, realized the recovery to chloroform, reduced the pollution to environment, also practiced thrift cost simultaneously.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is the structural representation of water distilling apparatus.
Fig. 2 is the structural representation of collection device.
1 is liquid separatnig tube among the figure, and 2 are the chloroform outlet, and 3 is wastewater outlet, and 4 is nichrome wire, and 5 is thermopair; 6 is temperature controller, and 7 is viewing window, and 8 is first step condensation, and 9 is second stage condensation; 10 and 12 is cooling water outlet, and 11 and 13 is the cooling water inlet, and 14 is condensate outlet, and 15 are the phlegma inlet; 16 is receiving flask, 17 tail gas bottles, and 18 is water, 19 is water distillation apparatus.
Embodiment
Liquid separatnig tube 1 links to each other with water distillation apparatus 19 through chloroform outlet 2, and a wastewater outlet 3 is arranged below the liquid separatnig tube.Nichrome wire 4 and thermopair 5 are equipped with in water distillation apparatus 19 bottoms.Thermopair 5 links to each other with temperature controller 6.Viewing window 7 is arranged on the water distillation apparatus 19.Water distillation apparatus 19 tops are connected with first step condensation 8 and second stage condensation 9.Condensing water inlet 11 is arranged, condensation-water drain 10 in the first step condensation 8; Condensing water inlet 13 and condensation-water drain 12 are arranged in the second stage condensation 9.Condensation 9 ends in the second stage are condensate outlets 14, and condensate outlet 14 links to each other with phlegma inlet 15, is connected with receiving flask 16 and tail gas bottle 17 behind the phlegma inlet 15.Water 18 is housed in the tail gas bottle 17.
Workflow:
Chloroform after the use at first gets into liquid separatnig tube 1, in liquid separatnig tube 1 behind the standing demix, opens chloroform outlet 2, lets chloroform flow into water distillation apparatus, and 4 pairs of chloroforms of nichrome wire heat then, by temperature in thermopair 5 and the temperature controller 6 control water distillation apparatuss at 70 oC.Can observe the height of chloroform liquid level in the water distillation apparatus through viewing window 7.The steam that chloroform produces after heating at first gets into first step condensation 8, in first step condensation 8, becomes liquid state by gaseous state.Get into second stage condensation 9 then, in first step condensation 8, do not have the chloroform vapor liquefaction of liquefaction, the chloroform temperature that has liquefied further reduces.Lower temperature can reduce the volatilization of chloroform, more helps follow-up collection.Get into receiving flask 16 from condensate outlet 14 effusive chloroforms through phlegma inlet 15.The chloroform vapor of liquefaction and evaporable chloroform do not get into tail gas bottle 17, owing in the tail gas bottle 17 a large amount of water is arranged, so in this condensation, and awash, be unlikely to evaporate in the air and go.
Chloroform after the use is by water, the mixture that impurity constitutes.In producing 3-chloro-2-hydroxypropyl-trimethyl ammonium chloride process, after catalyzer cleaned, main impurity be pair quaternized products and 1 in the chloroform, 3-two chloro-2-propyl alcohol.Wherein two quaternized products chemical formulas are C
9H
24N
2CL
2, relative molecular mass is 231.1,3-two chloro-2-propyl alcohol chemical formulas are C
3H
6CL
2, relative molecular mass 113, boiling point 172-176 oC.And the boiling point of chloroform is 61~62 ℃, because the boiling point temperature difference of chloroform and impurity is very big, so take to distill the recovery that just can realize chloroform for about 70 ℃ in the temperature more than the chloroform boiling point.Basis is novel reequips water distillation apparatus, on the heating unit of water distillation apparatus, has adorned a thermopair and temperature control device, and temperature is 70 ℃ in the control water distillation apparatus.Because chloroform volatilizees easily, be difficult for condensation, so adopted the secondary cooling, at the condensing and recycling Guan Houjia of water distillation apparatus a B-grade condensation TFL.Because chloroform has photosensitivity and easy volatile, again specially designed a kind of tail gas that prevents get into the collection device of air.Because the specific density of chloroform is 1.48, and water insoluble, can make chloroform and water sepn through separatory, so before chloroform gets into water distillation apparatus, added a liquid separatnig tube earlier by chloroform and water sepn.