CN104474730A - VCM (Vinyl Chloride Monomer) rectification separation device special for high-boiling residues and separation method - Google Patents
VCM (Vinyl Chloride Monomer) rectification separation device special for high-boiling residues and separation method Download PDFInfo
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- CN104474730A CN104474730A CN201410667047.3A CN201410667047A CN104474730A CN 104474730 A CN104474730 A CN 104474730A CN 201410667047 A CN201410667047 A CN 201410667047A CN 104474730 A CN104474730 A CN 104474730A
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Abstract
The invention relates to the technical field of separation devices, and in particular relates to a VCM (Vinyl Chloride Monomer) rectification separation device special for high-boiling residues and a separation method; the VCM rectification separation device special for high-boiling residues comprises a high-boiling residue storage tank, a separation tower, an intermediate tank, a low-boiling tower, a condenser, a backflow tank and a product storage tank; a feeding pipe is fixedly connected onto the feeding end of the high-boiling residue storage tank; the discharging end of the high-boiling residue storage tank and the feeding end of the separation tower are fixedly connected together through a first pipeline; a first gas outlet pipe is fixedly connected onto the gas-liquid outlet end of the separation tower; and the liquid-phase outlet end of the separation tower and the feeding end of the intermediate tank are fixedly connected together through a second pipeline. The VCM rectification separation device special for high-boiling residues disclosed by the invention is reasonable and compact in structure and convenient to use; by means of matched use of the high-boiling residue storage tank, the separation tower, the intermediate tank, the low-boiling tower, the condenser, the backflow tank and the product storage tank, the purposes of purifying and decolourizing high-boiling residues are achieved; the VCM rectification separation device special for high-boiling residues has the characteristics of being steady to operate and good in purifying and decolourizing effect; the additional value of high-boiling residues is increased; and the environmental pollution is reduced.
Description
Technical field
the present invention relates to chemical separation device technical field, is a kind of high-boiling components special VCM rectifying separator and separation method.
Background technology
high-boiling components is distinctive organic waste in Corvic industry production process, and be also the heavy distillat that in VCM production process, vinyl chloride distillation produces, its outward appearance is yellow black flammable liquid.The main extract of high-boiling components product is 1,1-dichloroethanes, and its purposes relates generally to chemical industry, chemical industries, is mainly used as binder, coating, insulating materials, synthetic fibers, chemical intermediate or solvent, also can be used for the field such as rubber solutions or varnish.The high-boiling components that the high tower rectifier unit that boils of vinyl chloride produces clearly is listed in " National Hazard refuse register " the 11st class, and refuse classification belongs to " HW11 essence (steaming) heats up in a steamer residue ".A certain proportion of high-boiling components will be produced in carbide pvc production process, usually by not purifying, the high-boiling components product of desolventing technology, the downstream unit reclaiming qualification is just simply sent to carry out low price recycling according to environmental requirement, and the gas phase vinyl chloride gas containing 51.17% in high-boiling components is discharged in atmospheric environment, causes pollution to environment.The method has certain limitation, is vulnerable to the restriction of the production and processing ability of downstream producer.Intermittent duty is operated to due to former vinyl chloride high-boiling components rectifier unit and three towers, so the quality of rectifying product is lower, the vcm of high-boiling components product, moisture and impurity content thereof are higher, the content of its main component 1,1 dichloroethanes is lower, average out to 41.13%, the gas phase vinyl chloride rate of recovery reclaimed is lower, the rate of recovery is less than 30%, and reclaims unstable, cannot meet the needs of high yield consecutive production.
Summary of the invention
the invention provides a kind of high-boiling components special VCM rectifying separator and separation method, overcome the deficiency of above-mentioned prior art, it can effectively solve, and existing high-boiling components impurity content is high can only be recycled at a low price, and have pollution containing vinyl chloride gas to environment in high-boiling components, cannot meet the problem of high yield consecutive production needs.
one of technical scheme of the present invention is realized by following measures: a kind of high-boiling components special VCM rectifying separator, comprises high-boiling components storage tank, knockout tower, pans, the low tower that boils, condenser, return tank and product storage tank, the feed end of high-boiling components storage tank is fixedly connected with feed pipe, the discharge end of high-boiling components storage tank and the feed end of knockout tower are fixed together by the first pipeline, the gaseous phase outlet end of knockout tower is fixedly connected with the first escape pipe, the liquid-phase outlet end of knockout tower and the feed end of pans are fixed together by the second pipeline, the discharge end of pans and the feed end of the low tower that boils are fixed together by the 3rd pipeline, the gaseous phase outlet end of the low tower that boils and the feed end of condenser are fixed together by the 4th pipeline, the gaseous phase outlet end of condenser is fixedly connected with the second escape pipe, the liquid-phase outlet end of condenser and the feed end of return tank are fixed together by the 5th pipeline, the discharge end of return tank and the feed end of product storage tank are fixed together by the 6th pipeline, the 7th pipeline is fixedly connected with between the 6th pipeline and the refluxing opening end of the low tower that boils, first pipeline and the 3rd pipeline are installed with pump respectively, first escape pipe, the second escape pipe, the 6th pipeline and the 7th pipeline are installed with valve respectively.
here is the further optimization and/or improvements to one of foregoing invention technical scheme:
there is raffinate storage tank in the above-mentioned outside at the low tower that boils, the liquid-phase outlet end of the low tower that boils and the feed end of raffinate storage tank are fixed together by the 8th pipeline, second escape pipe is fixedly connected with blow-down pipe, the condensed water entrance point of condenser is fixedly connected with condensed water water inlet pipe, on the condensed water of condenser answers back end, is fixedly connected with condensate ruturn pipe; The outlet end of product storage tank is fixedly connected with the 9th pipeline, the 9th pipeline is installed with pump, blow-down pipe and the 9th pipeline are installed with valve respectively.
above-mentioned knockout tower comprises knockout tower base, the first tower bottom reboiler, the first tower body, the second tower body and overhead condenser; First tower bottom reboiler is fixedly mounted on knockout tower base, the top of the first tower bottom reboiler is provided with entrance point, the lower end of the first tower body and the entrance point of the first tower bottom reboiler are fixedly installed togather, the upper end of the first tower body and the lower end of the second tower body are fixedly installed togather, the upper end of the second tower body and the entrance point of overhead condenser are fixedly installed togather, and the port of export of overhead condenser is installed with the first end socket; Bottom in the first tower body and middle part are installed with supporting screening plate respectively, in the second tower body, interval is installed with at least three supporting screening plates from bottom to up, be installed with gas-liquid separator above the supporting screening plate of the top in the second tower body, each supporting screening plate of the first tower body and the second tower body is filled with filler respectively; On the top of the first tower body, feed end is set, the discharge end of high-boiling components storage tank and the feed end of the first tower body are fixed together by the first pipeline, the top of the first end socket is provided with gaseous phase outlet end, the gaseous phase outlet end of the first end socket is fixedly connected with the first escape pipe.
the above-mentioned bottom at the first tower bottom reboiler is respectively arranged with hot water inlet end and hot water outlet end, the hot water inlet end of the first tower bottom reboiler is fixedly connected with the first hot water inlet pipe, the hot water outlet end of the first tower bottom reboiler is fixedly connected with the first hot water return pipe, the bottom of the first tower bottom reboiler is provided with outlet end, and the outlet end of the first tower bottom reboiler and the feed end of pans are fixed together by the second pipeline; Be respectively arranged with chilled water entrance point and chilled water outlet end in the upper and lower of overhead condenser, the chilled water entrance point and chilled water outlet end of overhead condenser are fixedly connected with chilled water water inlet pipe and chilled water return pipe respectively.
the above-mentioned low tower that boils comprises the low tower base that boils, the second tower bottom reboiler and tower body; Second tower bottom reboiler is fixedly mounted on and lowly boils on tower base, the top of the second tower bottom reboiler is provided with entrance point, the lower end of tower body and the entrance point of the second tower bottom reboiler are fixedly installed togather, the second end socket is installed with in the upper end of tower body, in tower body, interval is installed with at least three supporting screening plates from bottom to up, and each supporting screening plate of tower body is filled with filler respectively; At the middle part of tower body, feed end is set, the discharge end of pans and the feed end of tower body are fixed together by the 3rd pipeline, the top of the second end socket is provided with gaseous phase outlet end, and the gaseous phase outlet end of the second end socket and the feed end of condenser are fixed together by the 4th pipeline.
the above-mentioned bottom at the second tower bottom reboiler is respectively arranged with hot water inlet end and hot water outlet end, the hot water inlet end of the second tower bottom reboiler is fixedly connected with the second hot water inlet pipe, the hot water outlet end of the second tower bottom reboiler is fixedly connected with the second hot water return pipe, the bottom of the second tower bottom reboiler is provided with outlet end, and the outlet end of the second tower bottom reboiler and the feed end of raffinate storage tank are fixed together by the 8th pipeline.
the above-mentioned top at the first tower bottom reboiler is respectively arranged with pressure balance mouth end and pressure surveys mouth end, first tower bottom reboiler is respectively arranged with liquid level and surveys mouth end and temperature survey mouth end, be provided with temperature on the top of the first tower body and survey mouth end, be provided with temperature at the middle part of the second tower body and survey mouth end, the second tower body above gas-liquid separator is provided with temperature and surveys mouth end, be provided with temperature at the top of the first end socket and survey mouth end, be provided with pressure at the top of the second tower bottom reboiler and survey mouth end, second tower bottom reboiler is respectively arranged with liquid level and surveys mouth end and temperature survey mouth end, be provided with temperature at the middle part of tower body and survey mouth end, be provided with temperature at the top of the second end socket and survey mouth end, the pressure balance mouth end of the first tower bottom reboiler is fixedly connected with balance pipe, survey on mouth end at the pressure survey mouth end of the first tower bottom reboiler and the pressure of the second tower bottom reboiler and be installed with pressure transmitter respectively, survey on mouth end at the liquid level survey mouth end of the first tower bottom reboiler and the liquid level of the second tower bottom reboiler and be installed with fluid level transmitter respectively, mouth end is surveyed in the temperature of the first tower bottom reboiler, the temperature of the first tower body surveys mouth end, the middle portion temperature of the second tower body surveys mouth end, temperature on the second tower body above gas-liquid separator surveys mouth end, the temperature of the first end socket surveys mouth end, the temperature of the second tower bottom reboiler surveys mouth end, the temperature survey mouth end of tower body and the temperature of the second end socket are surveyed on mouth end and are installed with temperature transmitter respectively, or/and, filler is Pall ring filler, distance in first tower body between two supporting screening plates is 1500 millimeters, distance in second tower body between adjacent two supporting screening plates is 1500 millimeters, the internal diameter of the first tower body and the second tower body is 530 millimeters, distance in tower body between adjacent two supporting screening plates is 1500 millimeters, and the internal diameter of tower body is 530 millimeters, or/and, be fixedly installed togather by ring flange between first tower bottom reboiler and the first tower body, be fixedly installed togather by ring flange between first tower body and the second tower body, be fixedly installed togather by ring flange between second tower body and overhead condenser, be fixedly installed togather by ring flange between overhead condenser and the first end socket, be fixedly installed togather by ring flange between second tower bottom reboiler and tower body, be fixedly installed togather by ring flange between tower body and the second end socket, at feed pipe, first pipeline, second pipeline, 3rd pipeline, 4th pipeline, 5th pipeline, 8th pipeline is installed with valve respectively.
two of technical scheme of the present invention is realized by following measures: the separation method of a kind of high-boiling components special VCM rectifying separator, carry out as follows: the first step, high-boiling components in high-boiling components storage tank is by the first pipeline, the feed end of pump and knockout tower enters in the first tower bottom reboiler and heats, the temperature of the first tower bottom reboiler of knockout tower is 73 DEG C to 77 DEG C, the filler of light component in high-boiling components in the first tower body, filler in second tower body, after gas-liquid separator and overhead condenser, gas holder is entered finally by the first escape pipe, high-boiling components after being separated is stayed in the first tower bottom reboiler, second step, high-boiling components in first tower bottom reboiler after being separated enters pans by the second pipeline, being entered by the 3rd pipeline and pump lowlyer boils in tower, high-boiling components after being separated heats in the second tower bottom reboiler of the low tower that boils, the temperature of the second tower bottom reboiler of the low tower that boils is 60 DEG C to 65 DEG C, the filler of the light component of high-boiling components after being separated in tower body and the 4th pipeline enter in condenser, the light component of the high-boiling components after being separated obtains liquid and gas after condenser condenses, gas phase enters gas holder or emptying by the second escape pipe, liquid phase enters in return tank by the 5th pipeline, a liquid phase part in return tank enters in product storage tank, liquid phase another part in return tank enters in tower body, 3rd step, the heavy constituent of the high-boiling components in the second tower bottom reboiler after being separated regularly is entered in raffinate storage tank by the 8th pipeline.
here is the further optimization and/or improvements to foregoing invention technical scheme two:
the liquid level of above-mentioned high-boiling components storage tank is 50% to 75%, and the pressure of high-boiling components storage tank is 0.15MPa to 0.25MPa; Or/and the liquid level of the first tower bottom reboiler of knockout tower is 55% to 70%, and the tower top pressure of knockout tower is 0.10MPa to 0.20MPa, the tower top temperature of knockout tower is 10 DEG C to 20 DEG C; Or/and the pressure of pans is 0.049MPa to 0.051MPa, the liquid level of pans is 30% to 60%; Or/and the liquid level of the second tower bottom reboiler of the low tower that boils is 55% to 75%, the tower top temperature of the low tower that boils is 10 DEG C to 20 DEG C, and the reflux ratio of the low tower that boils is 1 to 3, and the tower pressure of the low tower that boils is 0.008MPa to 0.010MPa; Or/and 1.1-dichloroethanes average purity>=85% in the liquid of return tank, the pressure of return tank is 0.049MPa to 0.051MPa.
the above-mentioned tower top pressure when the low tower that boils carries out emptying process when being greater than 0.012MPa; Content of vinylchloride in the gas phase of the second escape pipe is greater than 70%, enter gas holder when being less than 3% containing oxygen.
reasonable and compact in structure of the present invention, easy to use, by high-boiling components storage tank, knockout tower, pans, the low tower that boils, condenser, return tank and product storage tank with the use of, realize the object that high-boiling components is purified and decoloured, have stable, purify and the feature of good decolorizing effect, improve the added value of high-boiling components, reduce environmental pollution.
Accompanying drawing explanation
accompanying drawing 1 is process flow diagram of the present invention.
accompanying drawing 2 is that the master of knockout tower in the present invention looks structure for amplifying schematic diagram.
accompanying drawing 3 is that the master of the low tower that boils in the present invention looks structure for amplifying schematic diagram.
coding in accompanying drawing is respectively: 1 is high-boiling components storage tank, 2 is knockout tower, 3 is pans, 4 is the low tower that boils, 5 is condenser, 6 is return tank, 7 is product storage tank, 8 is feed pipe, 9 is the first pipeline, 10 is the first escape pipe, 11 is the second pipeline, 12 is the 3rd pipeline, 13 is the 4th pipeline, 14 is the second escape pipe, 15 is the 5th pipeline, 16 is the 6th pipeline, 17 is the 7th pipeline, 18 is pump, 19 is raffinate storage tank, 20 is the 8th pipeline, 21 is blow-down pipe, 22 is condensed water water inlet pipe, 23 is condensate ruturn pipe, 24 is the 9th pipeline, 25 is knockout tower base, 26 is the first tower bottom reboiler, 27 is the first tower body, 28 is the second tower body, 29 is overhead condenser, 30 is the first end socket, 31 is supporting screening plate, 32 is gas-liquid separator, 33 is filler, 34 is the first hot water inlet pipe, 35 is the first hot water return pipe, 36 is chilled water water inlet pipe, 37 is chilled water return pipe, 38 is the low tower base that boils, 39 is the second tower bottom reboiler, 40 is tower body, 41 is the second end socket, 42 is the second hot water inlet pipe, 43 is the second hot water return pipe, 44 is ring flange.
Detailed description of the invention
the present invention by the restriction of following embodiment, can not determine concrete embodiment according to technical scheme of the present invention and actual conditions.
in the present invention, for convenience of description, the description of the relative position relation of each parts is all be described according to the Butut mode of Figure of description 1, as: the position relationship of forward and backward, upper and lower, left and right etc. determines according to the Butut direction of Figure of description 1.
below in conjunction with embodiment and accompanying drawing, the invention will be further described:
embodiment 1, as shown in Figure 1, this high-boiling components special VCM rectifying separator comprises high-boiling components storage tank 1, knockout tower 2, pans 3, the low tower 4 that boils, condenser 5, return tank 6 and product storage tank 7, the feed end of high-boiling components storage tank 1 is fixedly connected with feed pipe 8, the discharge end of high-boiling components storage tank 1 and the feed end of knockout tower 2 are fixed together by the first pipeline 9, the gaseous phase outlet end of knockout tower 2 is fixedly connected with the first escape pipe 10, the liquid-phase outlet end of knockout tower 2 and the feed end of pans 3 are fixed together by the second pipeline 11, the discharge end of pans 3 and the feed end of the low tower 4 that boils are fixed together by the 3rd pipeline 12, the low gaseous phase outlet end of the tower 4 that boils and the feed end of condenser 5 are fixed together by the 4th pipeline 13, the gaseous phase outlet end of condenser 5 is fixedly connected with the second escape pipe 14, the liquid-phase outlet end of condenser 5 and the feed end of return tank 6 are fixed together by the 5th pipeline 15, the discharge end of return tank 6 and the feed end of product storage tank 7 are fixed together by the 6th pipeline 16, the 7th pipeline 17 is fixedly connected with between the 6th pipeline 16 and the refluxing opening end of the low tower 4 that boils, first pipeline 9 and the 3rd pipeline 12 are installed with pump 18 respectively, first escape pipe 10, second escape pipe 14, the 6th pipeline 16 and the 7th pipeline 17 are installed with valve respectively.
according to actual needs, above-described embodiment 1 can be made further optimization and/or improvements:
as shown in Figure 1, raffinate storage tank 19 is had in low outside of boiling tower 4, the low liquid-phase outlet end of the tower 4 that boils and the feed end of raffinate storage tank 19 are fixed together by the 8th pipeline 20, second escape pipe 14 is fixedly connected with blow-down pipe 21, the condensed water entrance point of condenser 5 is fixedly connected with condensed water water inlet pipe 22, on the condensed water of condenser 5 answers back end, is fixedly connected with condensate ruturn pipe 23; The outlet end of product storage tank 7 is fixedly connected with the 9th pipeline 24, the 9th pipeline 24 is installed with pump 18, blow-down pipe 21 and the 9th pipeline 24 are installed with valve respectively.Like this, can by product loading by the 9th pipeline 24 and pump 18.
as shown in accompanying drawing 1,2, knockout tower 2 comprises knockout tower base 25, first tower bottom reboiler 26, first tower body 27, second tower body 28 and overhead condenser 29; First tower bottom reboiler 26 is fixedly mounted on knockout tower base 25, the top of the first tower bottom reboiler 26 is provided with entrance point, the lower end of the first tower body 27 and the entrance point of the first tower bottom reboiler 26 are fixedly installed togather, the upper end of the first tower body 27 and the lower end of the second tower body 28 are fixedly installed togather, the upper end of the second tower body 28 and the entrance point of overhead condenser 29 are fixedly installed togather, and the port of export of overhead condenser 29 is installed with the first end socket 30; Bottom in the first tower body 27 and middle part are installed with supporting screening plate 31 respectively, in the second tower body 28, interval is installed with at least three supporting screening plates 31 from bottom to up, be installed with gas-liquid separator 32 above the supporting screening plate 31 of the top in the second tower body 28, each supporting screening plate 31 of the first tower body 27 and the second tower body 28 is filled with filler 33 respectively; On the top of the first tower body 27, feed end is set, the discharge end of high-boiling components storage tank 1 and the feed end of the first tower body 27 are fixed together by the first pipeline 9, the top of the first end socket 30 is provided with gaseous phase outlet end, the gaseous phase outlet end of the first end socket 30 is fixedly connected with the first escape pipe 10.In the second tower body 28, interval is installed with five supporting screening plates 31 from bottom to up.
as shown in accompanying drawing 1,2, hot water inlet end and hot water outlet end is respectively arranged with in the bottom of the first tower bottom reboiler 26, the hot water inlet end of the first tower bottom reboiler 26 is fixedly connected with the first hot water inlet pipe 34, the hot water outlet end of the first tower bottom reboiler 26 is fixedly connected with the first hot water return pipe 35, the bottom of the first tower bottom reboiler 26 is provided with outlet end, and the outlet end of the first tower bottom reboiler 26 and the feed end of pans 3 are fixed together by the second pipeline 11; Be respectively arranged with chilled water entrance point and chilled water outlet end in the upper and lower of overhead condenser 29, the chilled water entrance point and chilled water outlet end of overhead condenser 29 are fixedly connected with chilled water water inlet pipe 36 and chilled water return pipe 37 respectively.Like this, during work, in the first hot water inlet pipe 34, pass into the conversion hot water of 90 DEG C; The chilled water of 7 DEG C is passed in chilled water water inlet pipe 36.
as shown in accompanying drawing 1,3, the low tower 4 that boils comprises low tower base 38, second tower bottom reboiler 39 and the tower body 40 of boiling; Second tower bottom reboiler 39 is fixedly mounted on and lowly boils on tower base 38, the top of the second tower bottom reboiler 39 is provided with entrance point, the lower end of tower body 40 and the entrance point of the second tower bottom reboiler 39 are fixedly installed togather, the second end socket 41 is installed with in the upper end of tower body 40, in tower body 40, interval is installed with at least three supporting screening plates 31 from bottom to up, and each supporting screening plate 31 of tower body 40 is filled with filler 33 respectively; At the middle part of tower body 40, feed end is set, the discharge end of pans 3 and the feed end of tower body 40 are fixed together by the 3rd pipeline 12, the top of the second end socket 41 is provided with gaseous phase outlet end, and the gaseous phase outlet end of the second end socket 41 and the feed end of condenser 5 are fixed together by the 4th pipeline 13.In tower body 40, interval is installed with five supporting screening plates 31 from bottom to up.
as shown in accompanying drawing 1,2, hot water inlet end and hot water outlet end is respectively arranged with in the bottom of the second tower bottom reboiler 39, the hot water inlet end of the second tower bottom reboiler 39 is fixedly connected with the second hot water inlet pipe 42, the hot water outlet end of the second tower bottom reboiler 39 is fixedly connected with the second hot water return pipe 43, the bottom of the second tower bottom reboiler 39 is provided with outlet end, and the outlet end of the second tower bottom reboiler 39 and the feed end of raffinate storage tank 19 are fixed together by the 8th pipeline 20.Like this, during work, in the second hot water inlet pipe 42, pass into the conversion hot water of 90 DEG C.
as accompanying drawing 1, 2, shown in 3, pressure balance mouth end and pressure survey mouth end is respectively arranged with at the top of the first tower bottom reboiler 26, first tower bottom reboiler 26 is respectively arranged with liquid level and surveys mouth end and temperature survey mouth end, be provided with temperature on the top of the first tower body 27 and survey mouth end, be provided with temperature at the middle part of the second tower body 28 and survey mouth end, the second tower body 28 above gas-liquid separator 32 is provided with temperature and surveys mouth end, be provided with temperature at the top of the first end socket 30 and survey mouth end, be provided with pressure at the top of the second tower bottom reboiler 39 and survey mouth end, second tower bottom reboiler 39 is respectively arranged with liquid level and surveys mouth end and temperature survey mouth end, be provided with temperature at the middle part of tower body 40 and survey mouth end, be provided with temperature at the top of the second end socket 41 and survey mouth end, the pressure balance mouth end of the first tower bottom reboiler 26 is fixedly connected with balance pipe, survey on mouth end at the pressure survey mouth end of the first tower bottom reboiler 26 and the pressure of the second tower bottom reboiler 39 and be installed with pressure transmitter respectively, survey on mouth end at the liquid level survey mouth end of the first tower bottom reboiler 26 and the liquid level of the second tower bottom reboiler 39 and be installed with fluid level transmitter respectively, mouth end is surveyed in the temperature of the first tower bottom reboiler 26, the temperature of the first tower body 27 surveys mouth end, the middle portion temperature of the second tower body 28 surveys mouth end, temperature on the second tower body 28 above gas-liquid separator 32 surveys mouth end, the temperature of the first end socket 30 surveys mouth end, the temperature of the second tower bottom reboiler 39 surveys mouth end, the temperature survey mouth end of tower body 40 and the temperature of the second end socket 41 are surveyed on mouth end and are installed with temperature transmitter respectively, or/and, filler 33 is Pall ring filler, distance in first tower body 27 between two supporting screening plates 31 is 1500 millimeters, distance in second tower body 28 between adjacent two supporting screening plates 31 is 1500 millimeters, the internal diameter of the first tower body 27 and the second tower body 28 is 530 millimeters, distance in tower body 40 between adjacent two supporting screening plates 31 is 1500 millimeters, and the internal diameter of tower body 40 is 530 millimeters, or/and, be fixedly installed togather by ring flange 44 between first tower bottom reboiler 26 and the first tower body 27, be fixedly installed togather by ring flange 44 between first tower body 27 and the second tower body 28, be fixedly installed togather by ring flange 44 between second tower body 28 and overhead condenser 29, be fixedly installed togather by ring flange 44 between overhead condenser 29 and the first end socket 30, be fixedly installed togather by ring flange 44 between second tower bottom reboiler 39 and tower body 40, be fixedly installed togather by ring flange 44 between tower body 40 and the second end socket 41, at feed pipe 8, first pipeline 9, second pipeline 11, 3rd pipeline 12, 4th pipeline 13, 5th pipeline 15, 8th pipeline 20 is installed with valve respectively.Like this, be convenient to installation and removal by ring flange 44, valve is convenient to control flow.
embodiment 2, as shown in Figure 1, the separation method of this high-boiling components special VCM rectifying separator carries out as follows: the first step, high-boiling components in high-boiling components storage tank 1 is by the first pipeline 9, the feed end of pump 18 and knockout tower 2 enters in the first tower bottom reboiler 26 and heats, the temperature of the first tower bottom reboiler 26 of knockout tower 2 is 73 DEG C to 77 DEG C, the filler 33 of light component in high-boiling components in the first tower body 27, filler 33 in second tower body 28, after gas-liquid separator 32 and overhead condenser 29, gas holder is entered finally by the first escape pipe 10, high-boiling components after being separated is stayed in the first tower bottom reboiler 26, second step, high-boiling components in first tower bottom reboiler 26 after being separated enters pans 3 by the second pipeline 11, being entered by the 3rd pipeline 12 and pump 18 lowlyer boils in tower 4, high-boiling components after being separated heats in the second tower bottom reboiler 39 of the low tower 4 that boils, the temperature of the second tower bottom reboiler 39 of the low tower 4 that boils is 60 DEG C to 65 DEG C, the filler 33 of the light component of high-boiling components after being separated in tower body 40 and the 4th pipeline 13 enter in condenser 5, the light component of the high-boiling components after being separated obtains liquid and gas after condenser 5 condensation, gas phase enters gas holder or emptying by the second escape pipe 14, liquid phase enters in return tank 6 by the 5th pipeline 15, a liquid phase part in return tank 6 enters in product storage tank 7, liquid phase another part in return tank 6 enters in tower body 40, 3rd step, the heavy constituent of the high-boiling components in the second tower bottom reboiler 39 after being separated regularly is entered in raffinate storage tank 19 by the 8th pipeline 20.Like this, Pall ring filler increases gas liquid interfacial area, improves mass tranfer coefficient; The distance of adjacent two supporting screening plates 31 can reach good mass transfer, heat-transfer effect; In the gas phase of the first escape pipe 10, vinyl chloride average purity is more than or equal to 90%; The liquid phase that the light component of the high-boiling components after being separated obtains after condenser 5 condensation is colourless transparent liquid, in colourless transparent liquid 1,1 dichloroethanes average purity is more than or equal to 85%, high-boiling components after initial gross separation price per ton is only 500 yuan, the colourless transparent liquid price per ton obtained after being again separated the high-boiling components after initial gross separation is 2800 yuan, substantially increase the added value of high-boiling components, and in colourless transparent liquid, the content of vinyl chloride gas is very low, reduces environmental pollution.
according to actual needs, above-described embodiment 2 can be made further optimization and/or improvements:
as required, the liquid level of high-boiling components storage tank 1 is 50% to 75%, and the pressure of high-boiling components storage tank 1 is 0.15MPa to 0.25MPa; Or/and the liquid level of the first tower bottom reboiler 26 of knockout tower 2 is 55% to 70%, and the tower top pressure of knockout tower 2 is 0.10MPa to 0.20MPa, the tower top temperature of knockout tower 2 is 10 DEG C to 20 DEG C; Or/and the pressure of pans 3 is 0.049MPa to 0.051MPa, the liquid level of pans 3 is 30% to 60%; Or/and the liquid level of the second tower bottom reboiler 39 of the low tower 4 that boils is 55% to 75%, the tower top temperature of the low tower 4 that boils is 10 DEG C to 20 DEG C, and the reflux ratio of the low tower 4 that boils is 1 to 3, and the tower pressure of the low tower 4 that boils is 0.008MPa to 0.010MPa; Or/and 1.1-dichloroethanes average purity>=85% in the liquid of return tank 6, the pressure of return tank 6 is 0.049MPa to 0.051MPa.
as required, emptying process is carried out when the low tower top pressure boiling tower 4 is greater than 0.012MPa; Content of vinylchloride in the gas phase of the second escape pipe 14 is greater than 70%, enter gas holder when being less than 3% containing oxygen.
respectively at the bottom of knockout tower tower, knockout tower tower top, low column overhead and the return tank of boiling carry out its average purity of sample analysis, as shown in table 1.
table 1
| Each sample point sample average purity | (liquid phase) at the bottom of knockout tower tower | Knockout tower tower top (gas phase) | Low column overhead of boiling (gas phase) | Return tank (liquid phase) |
| 1,1 dichloroethanes (%) | 85% | — | 10 to 20% | ≥85% |
| Vinyl chloride (%) | 5% | ≥90% | 70% | 5% |
| Apparent colour | Yellow black, muddiness | — | — | Colourless, transparent |
as can be seen from Table 1, by the separation method of the high-boiling components of embodiment 2, in the liquid phase of return tank 61, the average purity of 1 dichloroethanes is more than or equal to 85%, and is water white transparency, and the average purity of the vinyl chloride of knockout tower 2 tower top is more than or equal to 90%, make 1 in high-boiling components, 1 dichloroethanes and vinyl chloride obtain effective separation, improve the added value of high-boiling components, reduce environmental pollution.
above technical characteristic constitutes embodiments of the invention, and it has stronger adaptability and implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (10)
1. a high-boiling components special VCM rectifying separator, is characterized in that comprising high-boiling components storage tank, knockout tower, pans, the low tower that boils, condenser, return tank and product storage tank, the feed end of high-boiling components storage tank is fixedly connected with feed pipe, the discharge end of high-boiling components storage tank and the feed end of knockout tower are fixed together by the first pipeline, the gaseous phase outlet end of knockout tower is fixedly connected with the first escape pipe, the liquid-phase outlet end of knockout tower and the feed end of pans are fixed together by the second pipeline, the discharge end of pans and the feed end of the low tower that boils are fixed together by the 3rd pipeline, the gaseous phase outlet end of the low tower that boils and the feed end of condenser are fixed together by the 4th pipeline, the gaseous phase outlet end of condenser is fixedly connected with the second escape pipe, the liquid-phase outlet end of condenser and the feed end of return tank are fixed together by the 5th pipeline, the discharge end of return tank and the feed end of product storage tank are fixed together by the 6th pipeline, the 7th pipeline is fixedly connected with between the 6th pipeline and the refluxing opening end of the low tower that boils, first pipeline and the 3rd pipeline are installed with pump respectively, first escape pipe, the second escape pipe, the 6th pipeline and the 7th pipeline are installed with valve respectively.
2. high-boiling components according to claim 1 special VCM rectifying separator, it is characterized in that there is raffinate storage tank in the outside of the low tower that boils, the liquid-phase outlet end of the low tower that boils and the feed end of raffinate storage tank are fixed together by the 8th pipeline, second escape pipe is fixedly connected with blow-down pipe, the condensed water entrance point of condenser is fixedly connected with condensed water water inlet pipe, on the condensed water of condenser answers back end, is fixedly connected with condensate ruturn pipe; The outlet end of product storage tank is fixedly connected with the 9th pipeline, the 9th pipeline is installed with pump, blow-down pipe and the 9th pipeline are installed with valve respectively.
3. high-boiling components according to claim 1 and 2 special VCM rectifying separator, is characterized in that knockout tower comprises knockout tower base, the first tower bottom reboiler, the first tower body, the second tower body and overhead condenser; First tower bottom reboiler is fixedly mounted on knockout tower base, the top of the first tower bottom reboiler is provided with entrance point, the lower end of the first tower body and the entrance point of the first tower bottom reboiler are fixedly installed togather, the upper end of the first tower body and the lower end of the second tower body are fixedly installed togather, the upper end of the second tower body and the entrance point of overhead condenser are fixedly installed togather, and the port of export of overhead condenser is installed with the first end socket; Bottom in the first tower body and middle part are installed with supporting screening plate respectively, in the second tower body, interval is installed with at least three supporting screening plates from bottom to up, be installed with gas-liquid separator above the supporting screening plate of the top in the second tower body, each supporting screening plate of the first tower body and the second tower body is filled with filler respectively; On the top of the first tower body, feed end is set, the discharge end of high-boiling components storage tank and the feed end of the first tower body are fixed together by the first pipeline, the top of the first end socket is provided with gaseous phase outlet end, the gaseous phase outlet end of the first end socket is fixedly connected with the first escape pipe.
4. high-boiling components according to claim 3 special VCM rectifying separator, it is characterized in that the bottom of the first tower bottom reboiler is respectively arranged with hot water inlet end and hot water outlet end, the hot water inlet end of the first tower bottom reboiler is fixedly connected with the first hot water inlet pipe, the hot water outlet end of the first tower bottom reboiler is fixedly connected with the first hot water return pipe, the bottom of the first tower bottom reboiler is provided with outlet end, and the outlet end of the first tower bottom reboiler and the feed end of pans are fixed together by the second pipeline; Be respectively arranged with chilled water entrance point and chilled water outlet end in the upper and lower of overhead condenser, the chilled water entrance point and chilled water outlet end of overhead condenser are fixedly connected with chilled water water inlet pipe and chilled water return pipe respectively.
5. the special VCM rectifying of the high-boiling components according to claim 3 or 4 separator, is characterized in that the low tower that boils comprises the low tower base that boils, the second tower bottom reboiler and tower body; Second tower bottom reboiler is fixedly mounted on and lowly boils on tower base, the top of the second tower bottom reboiler is provided with entrance point, the lower end of tower body and the entrance point of the second tower bottom reboiler are fixedly installed togather, the second end socket is installed with in the upper end of tower body, in tower body, interval is installed with at least three supporting screening plates from bottom to up, and each supporting screening plate of tower body is filled with filler respectively; At the middle part of tower body, feed end is set, the discharge end of pans and the feed end of tower body are fixed together by the 3rd pipeline, the top of the second end socket is provided with gaseous phase outlet end, and the gaseous phase outlet end of the second end socket and the feed end of condenser are fixed together by the 4th pipeline.
6. high-boiling components according to claim 5 special VCM rectifying separator, it is characterized in that the bottom of the second tower bottom reboiler is respectively arranged with hot water inlet end and hot water outlet end, the hot water inlet end of the second tower bottom reboiler is fixedly connected with the second hot water inlet pipe, the hot water outlet end of the second tower bottom reboiler is fixedly connected with the second hot water return pipe, the bottom of the second tower bottom reboiler is provided with outlet end, and the outlet end of the second tower bottom reboiler and the feed end of raffinate storage tank are fixed together by the 8th pipeline.
7. high-boiling components according to claim 6 special VCM rectifying separator, it is characterized in that the top of the first tower bottom reboiler is respectively arranged with pressure balance mouth end and pressure surveys mouth end, first tower bottom reboiler is respectively arranged with liquid level and surveys mouth end and temperature survey mouth end, be provided with temperature on the top of the first tower body and survey mouth end, be provided with temperature at the middle part of the second tower body and survey mouth end, the second tower body above gas-liquid separator is provided with temperature and surveys mouth end, be provided with temperature at the top of the first end socket and survey mouth end, be provided with pressure at the top of the second tower bottom reboiler and survey mouth end, second tower bottom reboiler is respectively arranged with liquid level and surveys mouth end and temperature survey mouth end, be provided with temperature at the middle part of tower body and survey mouth end, be provided with temperature at the top of the second end socket and survey mouth end, the pressure balance mouth end of the first tower bottom reboiler is fixedly connected with balance pipe, survey on mouth end at the pressure survey mouth end of the first tower bottom reboiler and the pressure of the second tower bottom reboiler and be installed with pressure transmitter respectively, survey on mouth end at the liquid level survey mouth end of the first tower bottom reboiler and the liquid level of the second tower bottom reboiler and be installed with fluid level transmitter respectively, mouth end is surveyed in the temperature of the first tower bottom reboiler, the temperature of the first tower body surveys mouth end, the middle portion temperature of the second tower body surveys mouth end, temperature on the second tower body above gas-liquid separator surveys mouth end, the temperature of the first end socket surveys mouth end, the temperature of the second tower bottom reboiler surveys mouth end, the temperature survey mouth end of tower body and the temperature of the second end socket are surveyed on mouth end and are installed with temperature transmitter respectively, or/and, filler is Pall ring filler, distance in first tower body between two supporting screening plates is 1500 millimeters, distance in second tower body between adjacent two supporting screening plates is 1500 millimeters, the internal diameter of the first tower body and the second tower body is 530 millimeters, distance in tower body between adjacent two supporting screening plates is 1500 millimeters, and the internal diameter of tower body is 530 millimeters, or/and, be fixedly installed togather by ring flange between first tower bottom reboiler and the first tower body, be fixedly installed togather by ring flange between first tower body and the second tower body, be fixedly installed togather by ring flange between second tower body and overhead condenser, be fixedly installed togather by ring flange between overhead condenser and the first end socket, be fixedly installed togather by ring flange between second tower bottom reboiler and tower body, be fixedly installed togather by ring flange between tower body and the second end socket, at feed pipe, first pipeline, second pipeline, 3rd pipeline, 4th pipeline, 5th pipeline, 8th pipeline is installed with valve respectively.
8. the separation method of the high-boiling components special VCM rectifying separator according to claim 5 or 6 or 7, it is characterized in that carrying out as follows: the first step, high-boiling components in high-boiling components storage tank is by the first pipeline, the feed end of pump and knockout tower enters in the first tower bottom reboiler and heats, the temperature of the first tower bottom reboiler of knockout tower is 73 DEG C to 77 DEG C, the filler of light component in high-boiling components in the first tower body, filler in second tower body, after gas-liquid separator and overhead condenser, gas holder is entered finally by the first escape pipe, high-boiling components after being separated is stayed in the first tower bottom reboiler, second step, high-boiling components in first tower bottom reboiler after being separated enters pans by the second pipeline, being entered by the 3rd pipeline and pump lowlyer boils in tower, high-boiling components after being separated heats in the second tower bottom reboiler of the low tower that boils, the temperature of the second tower bottom reboiler of the low tower that boils is 60 DEG C to 65 DEG C, the filler of the light component of high-boiling components after being separated in tower body and the 4th pipeline enter in condenser, the light component of the high-boiling components after being separated obtains liquid and gas after condenser condenses, gas phase enters gas holder or emptying by the second escape pipe, liquid phase enters in return tank by the 5th pipeline, a liquid phase part in return tank enters in product storage tank, liquid phase another part in return tank enters in tower body, 3rd step, the heavy constituent of the high-boiling components in the second tower bottom reboiler after being separated regularly is entered in raffinate storage tank by the 8th pipeline.
9. the separation method of high-boiling components according to claim 8 special VCM rectifying separator, it is characterized in that the liquid level of high-boiling components storage tank is 50% to 75%, the pressure of high-boiling components storage tank is 0.15MPa to 0.25MPa; Or/and the liquid level of the first tower bottom reboiler of knockout tower is 55% to 70%, and the tower top pressure of knockout tower is 0.10MPa to 0.20MPa, the tower top temperature of knockout tower is 10 DEG C to 20 DEG C; Or/and the pressure of pans is 0.049MPa to 0.051MPa, the liquid level of pans is 30% to 60%; Or/and the liquid level of the second tower bottom reboiler of the low tower that boils is 55% to 75%, the tower top temperature of the low tower that boils is 10 DEG C to 20 DEG C, and the reflux ratio of the low tower that boils is 1 to 3, and the tower pressure of the low tower that boils is 0.008MPa to 0.010MPa; Or/and 1.1-dichloroethanes average purity >=85% in the liquid of return tank, the pressure of return tank is 0.049MPa to 0.051MPa.
10. the separation method of high-boiling components special VCM rectifying separator according to claim 8 or claim 9, is characterized in that carrying out emptying process when the tower top pressure of the low tower that boils is greater than 0.012MPa; Content of vinylchloride in the gas phase of the second escape pipe is greater than 70%, enter gas holder when being less than 3% containing oxygen.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501039A (en) * | 2017-07-28 | 2017-12-22 | 石河子开发区天业化工有限责任公司 | A kind of control method of vinyl chloride high boiling tower blowdown and recovery |
| CN110115850A (en) * | 2019-04-22 | 2019-08-13 | 宁夏凤城装备制造有限公司 | A kind of raffinate steams tower |
| CN111961205A (en) * | 2020-08-13 | 2020-11-20 | 江西蓝星星火有机硅有限公司 | Process for continuously producing various low-viscosity methyl silicone oils by comprehensively utilizing methyl silicone oil polymerization material |
| CN113171584A (en) * | 2021-04-26 | 2021-07-27 | 天津海成能源工程技术有限公司 | Iron removing liquid and method for removing iron ions of high-boiling residues of VCM device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5122235A (en) * | 1989-04-28 | 1992-06-16 | Mitsui Toatsu Chemicals, Incorporated | Process for the removal of chloroprene from, 1,2-dichloroethane |
| CN101912691A (en) * | 2010-08-20 | 2010-12-15 | 湖北兴发化工集团股份有限公司 | Method and device for performing refined separation on high-purity yellow phosphorous |
| CN102267865A (en) * | 2011-05-30 | 2011-12-07 | 新疆天业（集团）有限公司 | Method for purifying dichloroethane from vinyl chloride rectification residual liquid |
| CN202246101U (en) * | 2011-09-16 | 2012-05-30 | 沁阳市瑞元物资有限公司 | Trichlorosilane separation device for purification of substance with high/low boiling point |
| CN102863314A (en) * | 2011-07-06 | 2013-01-09 | 北京先锋创新科技发展有限公司 | Refining method for vinyl chloride in production of polrvinyl chloride |
| CN104211563A (en) * | 2014-07-21 | 2014-12-17 | 山东新龙科技股份有限公司 | Technology and device for recycling chloroethylene high-boiling substance |
-
2014
- 2014-11-20 CN CN201410667047.3A patent/CN104474730B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5122235A (en) * | 1989-04-28 | 1992-06-16 | Mitsui Toatsu Chemicals, Incorporated | Process for the removal of chloroprene from, 1,2-dichloroethane |
| CN101912691A (en) * | 2010-08-20 | 2010-12-15 | 湖北兴发化工集团股份有限公司 | Method and device for performing refined separation on high-purity yellow phosphorous |
| CN102267865A (en) * | 2011-05-30 | 2011-12-07 | 新疆天业（集团）有限公司 | Method for purifying dichloroethane from vinyl chloride rectification residual liquid |
| CN102863314A (en) * | 2011-07-06 | 2013-01-09 | 北京先锋创新科技发展有限公司 | Refining method for vinyl chloride in production of polrvinyl chloride |
| CN202246101U (en) * | 2011-09-16 | 2012-05-30 | 沁阳市瑞元物资有限公司 | Trichlorosilane separation device for purification of substance with high/low boiling point |
| CN104211563A (en) * | 2014-07-21 | 2014-12-17 | 山东新龙科技股份有限公司 | Technology and device for recycling chloroethylene high-boiling substance |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107501039A (en) * | 2017-07-28 | 2017-12-22 | 石河子开发区天业化工有限责任公司 | A kind of control method of vinyl chloride high boiling tower blowdown and recovery |
| CN110115850A (en) * | 2019-04-22 | 2019-08-13 | 宁夏凤城装备制造有限公司 | A kind of raffinate steams tower |
| CN111961205A (en) * | 2020-08-13 | 2020-11-20 | 江西蓝星星火有机硅有限公司 | Process for continuously producing various low-viscosity methyl silicone oils by comprehensively utilizing methyl silicone oil polymerization material |
| CN111961205B (en) * | 2020-08-13 | 2021-12-14 | 江西蓝星星火有机硅有限公司 | Process for continuously producing various low-viscosity methyl silicone oils by comprehensively utilizing methyl silicone oil polymerization material |
| CN113171584A (en) * | 2021-04-26 | 2021-07-27 | 天津海成能源工程技术有限公司 | Iron removing liquid and method for removing iron ions of high-boiling residues of VCM device |
| CN113171584B (en) * | 2021-04-26 | 2022-07-01 | 天津海成能源工程技术有限公司 | Iron removing liquid and method for removing iron ions of high-boiling residues of VCM device |
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| CN104474730B (en) | 2016-09-21 |
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