CN210012779U - MVR-based low-concentration ethanol recovery device - Google Patents
MVR-based low-concentration ethanol recovery device Download PDFInfo
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- CN210012779U CN210012779U CN201920271695.5U CN201920271695U CN210012779U CN 210012779 U CN210012779 U CN 210012779U CN 201920271695 U CN201920271695 U CN 201920271695U CN 210012779 U CN210012779 U CN 210012779U
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Abstract
A low concentration ethanol recovery device based on MVR comprises a low concentration ethanol recovery device body provided with a falling film heat exchanger (2) connected with a rectifying tower (1) and a reboiler (8) connected with the rectifying tower (1), a separator (3) connected with the falling film heat exchanger (2) and used for extracting steam, a compressor unit connected with the separator (3) and the reboiler (8) respectively and used for increasing the temperature of the steam, rectifying the low-concentration ethanol raw material by a low-concentration ethanol recovery device body to obtain an ethanol finished product, separating the ethanol finished product by a separator (3) and a compressor unit, the steam after rectification is heated and then serves as a heating source of the rectifying tower (1), so that the matching of single-tower ethanol distillation and MVR evaporation technologies is realized, the reutilization rate of heat energy is improved, and the consumption of the heat energy is reduced.
Description
Technical Field
The utility model relates to a low concentration ethanol recovery unit and method, especially a low concentration ethanol recovery unit based on MVR.
Background
The low-concentration ethanol is recovered, so that the yield of the ethanol is improved, therefore, the low-concentration ethanol recovery device and the low-concentration ethanol recovery method are important rectification devices and methods, and in the existing low-concentration ethanol recovery device and method, no low-concentration ethanol recovery device based on MVR exists, so that the matching of single-tower ethanol distillation and MVR evaporation technologies is realized.
Disclosure of Invention
The utility model discloses an object is a low concentration ethanol recovery unit based on MVR.
In order to overcome the technical defect, the utility model aims at providing a low concentration ethanol recovery unit based on MVR consequently realizes the matching of single tower ethanol distillation and MVR evaporation technique, has improved the reuse rate of heat energy and has reduced the consumption of heat energy.
In order to achieve the purpose, the utility model adopts the technical proposal that:
the utility model provides a low concentration ethanol recovery unit based on MVR, includes and has the falling film heat exchanger that sets up to hookup with the rectifying column and set up to the low concentration ethanol recovery unit body of the reboiler that couples with the rectifying column, set up to couple and be used for extracting the separator of steam with the falling film heat exchanger, set up to couple and be used for promoting the compressor unit of steam temperature with separator and reboiler respectively.
Because the separator, the compressor unit and the low-concentration ethanol recovery device body are designed, the low-concentration ethanol raw material is rectified by the low-concentration ethanol recovery device body to obtain an ethanol finished product, condensed liquid condensed by a heat source is subjected to flash evaporation, compression and temperature rise through the separator and the compressor unit and then is used as a heating source of the rectifying tower, so that the single-tower ethanol distillation and MVR evaporation technology is matched, the heat energy reutilization rate is improved, and the heat energy consumption is reduced.
The utility model designs a, according to promote tail emission steam temperature's mode again and interconnect separator, compressor unit and low concentration ethanol recovery unit body.
The utility model discloses a, according to the mode that promotes tail emission steam temperature through MVR to this body hookup of separator and compressor unit and low concentration ethanol recovery unit.
The utility model discloses a, compressor unit sets up to include first compressor and second compressor.
The utility model discloses a, low concentration ethanol recovery unit body sets up to still include first circulating pump, buffer tank, backwash pump, second circulating pump, vacuum pump, first pre-heater, second pre-heater, condensation water pitcher and condensate pump.
The utility model designs a raw material tank of low-concentration ethanol is connected with the input port of a rectifying tower through a first preheater and a second preheater, the output port of the rectifying tower is connected with a finished product tank of ethanol through a falling film heat exchanger, the liquid output port of the falling film heat exchanger is connected with the input port of a buffer tank and the output port of the buffer tank is connected with the reflux port of the rectifying tower through a reflux pump, the steam output port of the falling film heat exchanger is connected with the first input port of a separator and the output port of the separator is respectively connected with the second input port of a reboiler through a first compressor and a second compressor, the second output port of the reboiler is respectively connected with the heat exchange input port of the first preheater and the heat exchange input port of the second preheater, the heat exchange output port portion of the second preheater is set to be connected with the input port portion of the condensed water tank, the first output port portion of the condensed water tank is set to be connected with the third input port portion of the reboiler, the second output port portion of the condensed water tank is set to be connected with the second input port portion of the separator through the condensed water pump, the first input port portion of the reboiler is set to be communicated with saturated steam of the heat source, the first output port portion of the reboiler is set to be connected with the heating source of the rectifying tower, a first circulating pump is arranged on the falling film heat exchanger, and a second circulating pump and a vacuum pump are respectively arranged on the reboiler.
The utility model discloses a, first pre-heater and second pre-heater set up to plate heat exchanger and the material input oral area of first pre-heater sets up to the head tank hookup with low concentration ethanol, the material output oral area of first pre-heater sets up to the material input oral area hookup with the second pre-heater, the material output oral area of second pre-heater sets up to the material input oral area hookup with the rectifying column, the heat exchange input oral area of first pre-heater sets up to the output oral area hookup with the second circulating pump and the heat exchange output oral area of first pre-heater sets up to the hookup with the waste water pipe, the heat exchange input oral area of second pre-heater sets up to the lower extreme output oral area hookup with the reboiler and the heat exchange output oral area of second pre-heater sets.
The utility model discloses a, the rectifying column sets up to the cylindricality column form body and the state of rectifying column sets up to atmospheric distillation, be provided with material input oral area at the middle part of rectifying column and the material input oral area of rectifying column sets up to hookup with the second pre-heater, top portion at the rectifying column is provided with output oral area and backward flow port portion respectively and the output oral area of rectifying column sets up to hookup with falling liquid film heat exchanger, the backward flow port portion of rectifying column sets up to hookup with the backwash pump, lower tip at the rectifying column is provided with respectively and adds heat exchange tube and the input oral area of the heat exchange tube of rectifying column sets up to hookup with the reboiler, the output oral area of the heat exchange tube of rectifying column sets up to hookup with the second circulating pump.
The utility model discloses a, falling liquid film heat exchanger's state sets up to the negative pressure, falling liquid film heat exchanger's upper end port portion sets up to the output oral area hookup with first circulating pump and falling liquid film heat exchanger's lower extreme port portion sets up to the input oral area hookup with first circulating pump, be provided with the input oral area and falling liquid film heat exchanger's input oral area sets up to hookup with the rectifying column in falling liquid film heat exchanger's upper end, be provided with liquid output oral area and falling liquid film heat exchanger's liquid output oral area sets up to hookup with the buffer tank in falling liquid film heat exchanger's bottom, be provided with steam output oral area and falling liquid film heat exchanger's steam output oral area sets up to hook.
The utility model discloses a, first circulating pump sets up to the high-temperature pump and first circulating pump sets up the utility model designs a, the buffer tank sets up to the cylindricality canning body, is provided with the input oral area in the upper end of buffer tank and the input oral area of buffer tank sets up to hookup with falling liquid film heat exchanger, is provided with the output oral area in the bottom of buffer tank and the output oral area of buffer tank sets up to hookup with the backwash pump.
The utility model discloses a, the input oral area of backwash pump sets up to hookup with the buffer tank and the input oral area of backwash pump sets up respectively to hookup with the finished product jar of rectifying column and ethanol.
The utility model discloses a, the separator sets up to vapour and liquid separator, be provided with first input oral area and second input oral area and the first input oral area of separator sets up to hookup with falling liquid film heat exchanger, the second input oral area of separator sets up to hookup with the condensate pump, be provided with the output oral area and the output oral area of separator sets up to hookup with first compressor on the top of separator, be provided with the liquid output oral area and the liquid output oral area of separator sets up to hookup with first circulating pump in the bottom of separator.
The utility model discloses a, first compressor and second compressor set up to be the serial-type hookup and the input oral area of first compressor sets up to hookup with the separator, and the output oral area of first compressor sets up to hookup with the input oral area of second compressor and the output oral area of second compressor sets up to hookup with the reboiler.
The utility model discloses a, the state of reboiler sets up to the ordinary pressure, the upper end port portion of reboiler sets up to the output port portion hookup with the second circulating pump and the lower end port portion of reboiler sets up to the input port portion hookup with the second circulating pump, the intermediate part at the reboiler is provided with vacuum port portion and third input port portion respectively and the vacuum port portion of reboiler sets up to hookup with the vacuum pump, the third input port portion of reboiler sets up to hookup with the condensate tank, be provided with first input port portion and second input port portion respectively and the first input port portion of reboiler sets up to the saturated steam intercommunication with the heat source in the upper end of reboiler, the second input port portion of reboiler sets up to hookup with the second compressor, be provided with first output port portion and second output port portion respectively and the first output port portion of reboiler sets up to hookup with the rectifying column, the reboiler, The second output port of the reboiler is configured to be coupled to a second preheater.
The utility model discloses a, the second circulating pump sets up to the high temperature pump and the input oral area of second circulating pump sets up respectively to be coupleed with rectifying column and reboiler, and the output oral area of second circulating pump sets up to be coupleed with the reboiler.
The utility model relates to a, the vacuum pump setting is on the reboiler.
The utility model discloses a, the condensation water pitcher sets up to the cylindricality canning, is provided with the input oral area and the input oral area of condensation water pitcher sets up to coupleing with the second pre-heater at the intermediate part of condensation water pitcher, is provided with first output oral area and the first output oral area of condensation water pitcher sets up to coupleing with the reboiler on the top of condensation water pitcher, is provided with second output oral area and the second output oral area of condensation water pitcher sets up to coupleing with the condensate water pump in the bottom of condensation water pitcher.
The utility model designs a, condensate pump's input oral area sets up to hookup and condensate pump's output oral area to hookup with the separator with the condensation water pitcher.
The utility model discloses a, rectifying column, falling liquid film heat exchanger, first circulating pump, buffer tank, backwash pump, reboiler, second circulating pump, vacuum pump, first pre-heater, second pre-heater, condensation water pitcher and condensate pump and separator, first compressor and second compressor set up to distribute according to the mode of intensification again.
In the technical scheme, the low-concentration ethanol is ethanol with the concentration of 25-80 ℃.
In the technical scheme, the separator, the compressor unit and the low-concentration ethanol recovery device body which raise the temperature of the tail discharge steam are important technical features, and in the technical field of the low-concentration ethanol recovery device based on MVR, the low-concentration ethanol recovery device has novelty, creativity and practicability, and the terms in the technical scheme can be explained and understood by using patent documents in the technical field.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Figure 1 is a schematic view of the present invention,
the system comprises a rectifying tower-1, a falling film heat exchanger-2, a first circulating pump-21, a separator-3, a first compressor-4, a second compressor-5, a buffer tank-6, a reflux pump-7, a reboiler-8, a second circulating pump-81, a vacuum pump-82, a first preheater-9, a second preheater-91, a condensate water tank-92 and a condensate water pump-93.
Detailed Description
Terms such as "having," "including," and "comprising," as used herein with respect to the present invention, are to be understood as not specifying the presence or addition of one or more other elements or combinations thereof.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, the technical features mentioned in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other, and unless otherwise specified, the equipment and materials used in the following examples are commercially available, and if the processing conditions are not specified, please refer to the purchased product specification or follow the conventional method in the art.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Fig. 1 is a first embodiment of the present invention, which is specifically described with reference to the accompanying drawings, and comprises a rectifying tower 1, a falling film heat exchanger 2, a first circulating pump 21, a separator 3, a first compressor 4, a second compressor 5, a buffer tank 6, a reflux pump 7, a reboiler 8, a second circulating pump 81, a vacuum pump 82, a first preheater 9, a second preheater 91, a condensed water tank 92 and a condensed water pump 93,
a raw material tank of low-concentration ethanol is connected with an input port part of a rectifying tower 1 through a first preheater 9 and a second preheater 91, an output port part of the rectifying tower 1 is connected with a finished product tank of ethanol through a falling film heat exchanger 2, a liquid output port part of the falling film heat exchanger 2 is connected with an input port part of a buffer tank 6, an output port part of the buffer tank 6 is connected with a reflux port part of the rectifying tower 1 through a reflux pump 7, a steam output port part of the falling film heat exchanger 2 is connected with a first input port part of a separator 3, an output port part of the separator 3 is respectively connected with a second input port part of a reboiler 8 through a first compressor 4 and a second compressor 5, a second output port part of the reboiler 8 is respectively connected with a heat exchange input port part of the first preheater 9 and a heat exchange input port part of the second preheater 91, the heat exchange output port of the second preheater 91 is set to be coupled to the input port of the condensed water tank 92, the first output port of the condensed water tank 92 is set to be coupled to the third input port of the reboiler 8 and the second output port of the condensed water tank 92 is set to be coupled to the second input port of the separator 3 through the condensed water pump 93, the first input port of the reboiler 8 is set to be communicated to the saturated steam of the heat source and the first output port of the reboiler 8 is set to be coupled to the heating source of the rectifying tower 1, the falling film heat exchanger 2 is provided with the first circulation pump 21 and the reboiler 8 is provided with the second circulation pump 81 and the vacuum pump 82, respectively.
In this embodiment, the first preheater 9 and the second preheater 91 are plate heat exchangers and the material input port of the first preheater 9 is configured to be coupled to a raw material tank of low concentration ethanol, the material output port of the first preheater 9 is configured to be coupled to the material input port of the second preheater 91, the material output port of the second preheater 91 is configured to be coupled to the material input port of the rectifying tower 1, the heat exchange input port of the first preheater 9 is configured to be coupled to the output port of the second circulating pump 81 and the heat exchange output port of the first preheater 9 is configured to be coupled to a wastewater pipe, the heat exchange input port portion of the second preheater 91 is provided to be coupled with the lower end output port portion of the reboiler 8 and the heat exchange output port portion of the second preheater 91 is provided to be coupled with the middle input port portion of the condensed water tank 92.
Through first pre-heater 9 and second pre-heater 91, formed the support tie point to rectifying column 1, reboiler 8, second circulating pump 81 and condensation water pitcher 92, by second pre-heater 91, realized being connected with rectifying column 1, realized being connected with reboiler 8, realized being connected with condensation water pitcher 92, by first pre-heater 9, realized being connected with second circulating pump 81, its technical aim at: the method is used for realizing preheating treatment on the low-concentration ethanol raw material.
In this embodiment, the rectifying tower 1 is set to be a cylindrical tower-shaped body and the state of the rectifying tower 1 is set to be atmospheric distillation, the middle part of the rectifying tower 1 is provided with a material input port part and the material input port part of the rectifying tower 1 is set to be coupled with the second preheater 91, the top end part of the rectifying tower 1 is respectively provided with an output port part and a reflux port part and the output port part of the rectifying tower 1 is set to be coupled with the falling film heat exchanger 2, the reflux port part of the rectifying tower 1 is set to be coupled with the reflux pump 7, the lower end part of the rectifying tower 1 is respectively provided with a heating exchange tube and the input port part of the heating exchange tube of the rectifying tower 1 is set to be coupled with the reboiler 8, and the output port part of the heating exchange tube of the rectifying tower 1 is set to be coupled.
Through rectifying column 1, formed the support tie point to second pre-heater 91, falling liquid film heat exchanger 2, backwash pump 7, reboiler 8 and second circulating pump 81, by rectifying column 1, realized being connected with second pre-heater 91, realized being connected with falling liquid film heat exchanger 2, realized being connected with backwash pump 7, realized being connected with reboiler 8, realized being connected with second circulating pump 81, its technical aim at: is used for realizing steam heating treatment on the low-concentration ethanol raw material.
In this embodiment, the state of the falling film heat exchanger 2 is set to a negative pressure, the upper end port of the falling film heat exchanger 2 is set to be coupled to the output port of the first circulation pump 21 and the lower end port of the falling film heat exchanger 2 is set to be coupled to the input port of the first circulation pump 21, the upper end of the falling film heat exchanger 2 is provided with the input port and the input port of the falling film heat exchanger 2 is set to be coupled to the rectifying tower 1, the bottom of the falling film heat exchanger 2 is provided with the liquid output port and the liquid output port of the falling film heat exchanger 2 is set to be coupled to the buffer tank 6, the lower end of the falling film heat exchanger 2 is provided with the steam output port and the steam output port of the falling film heat exchanger 2 is set.
Through falling liquid film heat exchanger 2, formed the support tie point to first circulating pump 21, rectifying column 1, buffer tank 6 and separator 3, by falling liquid film heat exchanger 2, realized being connected with first circulating pump 21, realized being connected with rectifying column 1, realized being connected with buffer tank 6, realized being connected with separator 3, its technical aim at: the method is used for carrying out liquefaction treatment on the steam of the low-concentration ethanol.
In the present embodiment, the first circulation pump 21 is provided as a high temperature pump and the first circulation pump 21 is provided on the falling film heat exchanger 2.
Through first circulating pump 21, formed the support tie point to falling film heat exchanger 2, by first circulating pump 21, realized being connected with falling film heat exchanger 2, its technical aim at: used for material circulation treatment of the falling film heat exchanger 2.
In the present embodiment, the buffer tank 6 is provided as a cylindrical tank-shaped body, an input port portion is provided at the upper end of the buffer tank 6 and the input port portion of the buffer tank 6 is provided to be coupled with the falling film heat exchanger 2, an output port portion is provided at the bottom end of the buffer tank 6 and the output port portion of the buffer tank 6 is provided to be coupled with the reflux pump 7.
Through buffer tank 6, formed the support tie point to falling film heat exchanger 2 and backwash pump 7, by buffer tank 6, realized being connected with falling film heat exchanger 2, realized being connected with backwash pump 7, its technical aim at: the method is used for storing the finished product of the liquid ethanol.
In the present embodiment, the inlet port portion of the reflux pump 7 is provided to be coupled with the buffer tank 6 and the inlet port portions of the reflux pump 7 are provided to be coupled with the rectifying tower 1 and the finished product tank of ethanol, respectively.
Through reflux pump 7, formed the support tie point to buffer tank 6 and rectifying column 1, by reflux pump 7, realized being connected with buffer tank 6, realized being connected with rectifying column 1, its technical aim at: used for outputting the finished product of the liquid ethanol.
In the present embodiment, the separator 3 is provided as a gas-liquid separator, the first input port portion and the second input port portion are provided in the middle portion of the separator 3 and the first input port portion of the separator 3 is provided to be coupled to the falling film heat exchanger 2, the second input port portion of the separator 3 is provided to be coupled to the condensate pump 93, the output port portion is provided at the top end of the separator 3 and the output port portion of the separator 3 is provided to be coupled to the first compressor 4, the liquid output port portion is provided at the bottom end of the separator 3 and the liquid output port portion of the separator 3 is provided to be coupled to the first circulation pump 21.
Through separator 3, formed the support tie point to falling liquid film heat exchanger 2, first circulating pump 21, first compressor 4 and condensate pump 93, by separator 3, realized being connected with falling liquid film heat exchanger 2, realized being connected with first circulating pump 21, realized being connected with first compressor 4, realized being connected with condensate pump 93, its technical aim at: for the separation of liquid and vapour.
In the present embodiment, the first compressor 4 and the second compressor 5 are arranged in series connection and the input port of the first compressor 4 is arranged to be coupled with the separator 3, the output port of the first compressor 4 is arranged to be coupled with the input port of the second compressor 5 and the output port of the second compressor 5 is arranged to be coupled with the reboiler 8.
Through first compressor 4 and second compressor 5, formed the support connection point to separator 3 and reboiler 8, realized by first compressor 4 and second compressor 5 with separator 3's connection, realized with reboiler 8's connection, its technical aim is: used for heating the steam.
In the present embodiment, the state of the reboiler 8 is set to normal pressure, the upper end port of the reboiler 8 is set to be coupled to the output port of the second circulation pump 81 and the lower end port of the reboiler 8 is set to be coupled to the input port of the second circulation pump 81, the middle part of the reboiler 8 is provided with a vacuum port and a third input port respectively and the vacuum port of the reboiler 8 is set to be coupled to the vacuum pump 82, the third input port of the reboiler 8 is set to be coupled to the condensate tank 92, the upper end of the reboiler 8 is provided with a first input port and a second input port respectively and the first input port of the reboiler 8 is set to be communicated with the saturated steam of the heat source, the second input port of the reboiler 8 is set to be coupled to the second compressor 5, the lower end of the reboiler 8 is provided with a first output port and a second output port respectively and the first output port of the reboiler 8 is set to be coupled to the, A second outlet port of the reboiler 8 is provided in connection with the second preheater 91.
Through reboiler 8, formed rectifying column 1, second preheater 91, second compressor 5, second circulating pump 81, the support tie point of vacuum pump 82 and condensation water pitcher 92, by reboiler 8, realized being connected with rectifying column 1, realized being connected with second preheater 91, realized being connected with second compressor 5, realized being connected with second circulating pump 81, realized being connected with vacuum pump 82, realized being connected with condensation water pitcher 92, its technical aim at: for supplying heating gas to the rectifying tower 1 and the second preheater 91.
In the present embodiment, the second circulation pump 81 is provided as a high temperature pump and the inlet port of the second circulation pump 81 is provided to be coupled to the rectifying tower 1 and the reboiler 8, respectively, and the outlet port of the second circulation pump 81 is provided to be coupled to the reboiler 8.
Through second circulating pump 81, formed the support tie point to rectifying column 1 and reboiler 8, by second circulating pump 81, realized being connected with rectifying column 1, realized being connected with reboiler 8, its technical aim at: for material recycling treatment of the reboiler 8.
In the present embodiment, the vacuum pump 82 is provided on the reboiler 8.
Through vacuum pump 82, formed the support tie point to reboiler 8, realized being connected with reboiler 8 by vacuum pump 82, its technical aim at: for negative pressure treatment of the reboiler 8.
In the present embodiment, the condensed water tank 92 is provided as a cylindrical tank body, an input port portion is provided at the middle portion of the condensed water tank 92 and the input port portion of the condensed water tank 92 is provided to be coupled to the second preheater 91, a first output port portion is provided at the top end of the condensed water tank 92 and the first output port portion of the condensed water tank 92 is provided to be coupled to the reboiler 8, and a second output port portion is provided at the bottom end of the condensed water tank 92 and the second output port portion of the condensed water tank 92 is provided to be coupled to the condensed water pump 93.
Through condensation water pitcher 92, formed the support tie point to second pre-heater 91, reboiler 8 and condensate pump 93, by condensation water pitcher 92, realized being connected with second pre-heater 91, realized being connected with reboiler 8, realized being connected with condensate pump 93, its technical aim at: for storage of liquid and vapour.
In the present embodiment, an input port portion of the condensed water pump 93 is provided to be coupled with the condensed water tank 92 and an output port portion of the condensed water pump 93 is provided to be coupled with the separator 3.
Through condensate pump 93, formed the support tie point to separator 3 and condensate water pitcher 92, by condensate pump 93, realized being connected with separator 3, realized being connected with condensate water pitcher 92, its technical aim at: for feeding steam into the separator 3.
In the present embodiment, the rectifying tower 1, the falling film heat exchanger 2, the first circulation pump 21, the buffer tank 6, the reflux pump 7, the reboiler 8, the second circulation pump 81, the vacuum pump 82, the first preheater 9, the second preheater 91, the condensed water tank 92, and the condensed water pump 93 are disposed to be distributed in a manner of reheating with the separator 3, the first compressor 4, and the second compressor 5.
The second embodiment of the present invention connects the separator 3, the compressor unit and the low concentration ethanol recovery unit body to each other in such a manner as to raise the temperature of the exhaust steam again.
In the present embodiment, the separator 3 and the compressor group are coupled to the low concentration ethanol recovery apparatus body in such a manner that the temperature of the tail discharge vapor is raised by MVR.
In the present embodiment, the compressor group is configured to include the first compressor 4 and the second compressor 5.
In this embodiment, the low concentration ethanol recovery apparatus body is configured to further include a first circulation pump 21, a buffer tank 6, a reflux pump 7, a second circulation pump 81, a vacuum pump 82, a first preheater 9, a second preheater 91, a condensed water tank 92, and a condensed water pump 93.
The second embodiment of the present invention is based on the first embodiment.
The recovery method comprises the following steps: raw materials in a raw material tank of low-concentration ethanol enter a first preheater 9 and then enter a second preheater 91, preheating treatment is carried out in the first preheater 9 and the second preheater 91 to obtain raw materials with the temperature of 65-70 ℃, the raw materials are injected into a rectifying tower 1 through a material input port part of the rectifying tower 1, the raw materials with the temperature of 65-75 ℃ are heated in the rectifying tower 1 to form ethanol steam, the ethanol steam enters a falling film heat exchanger 2 through an output port part of the rectifying tower 1 and an input port part of the falling film heat exchanger 2, cooling treatment is carried out in the falling film heat exchanger 2, the temperature of the falling film heat exchanger 2 is kept to be 72-74 ℃, the vacuum degree of the falling film heat exchanger 2 is set to be-0.062 MPa to-0.067 MPa, the ethanol steam is formed into ethanol liquid, the ethanol liquid is injected into a buffer tank 6 through a liquid output end part of the falling film heat exchanger 2 and an input port part of the buffer tank 6, injecting one part of ethanol liquid into an ethanol finished product tank through a reflux pump 7, injecting the other part of the ethanol liquid into the rectifying tower 1 through a reflux port part of the rectifying tower 1, injecting liquid and steam of the falling film heat exchanger 2 into the separator 3 through a steam output port part of the falling film heat exchanger 2 and a first input port part of the separator 3, processing tail discharge steam of the separator 3 through a first compressor 4 and a second compressor 5 to obtain steam with the temperature of 108- At-80.5 ℃, heating steam is injected into the second preheater 91 through the second output port of the reboiler 8, liquid of the heating exchange tube of the rectifying tower 1 and liquid of the reboiler 8 are respectively injected into the first preheater 9 and reflows to the reboiler 8 through the second circulating pump 81, the liquid of the first preheater 9 is discharged through a waste water pipeline, the liquid of the second preheater 91 is injected into the condensate water tank 92, steam of the condensate water tank 92 is injected into the reboiler 8 through the third input port of the reboiler 8, the liquid of the condensate water tank 92 is injected into the separator 3 through the condensate water pump 93, the first circulating pump 21 circulates the liquid of the falling film heat exchanger 2 in the falling film heat exchanger 2, and the vacuum pump 82 extracts and evacuates non-condensable gas of the reboiler 8.
The brief description is: a falling film heat exchanger 2 for converting ethanol vapor generated by the rectifying tower 1 into ethanol liquid, a reboiler 8 for heating the rectifying tower 1 to keep the temperature of the lower end part of the rectifying tower 1 at 103-105 ℃ and the temperature of the upper end part of the rectifying tower 1 at 78.5-80.5 ℃, a separator 3 for extracting tail discharge vapor from the falling film heat exchanger 2, a separator for heating the extracted tail discharge vapor and keeping the temperature of the tail discharge vapor at 108-110 ℃, and the tail discharge vapor is injected into the reboiler 8.
The utility model has the characteristics of down:
1. because the separator 3, the compressor unit and the low-concentration ethanol recovery device body are designed, the raw material of the low-concentration ethanol is rectified by the low-concentration ethanol recovery device body to obtain an ethanol finished product, and the steam subjected to rectification treatment is heated by the separator 3 and the compressor unit and then serves as a heating source of the rectifying tower 1, so that the single-tower ethanol distillation and MVR evaporation technology are matched, the heat energy reutilization rate is improved, and the heat energy consumption is reduced.
2. Because the first compressor 4 and the second compressor 5 are designed, the steam heating effect of the rectification treatment is improved through the series unit.
3. Due to the design of the first circulating pump 21, the buffer tank 6, the reflux pump 7, the second circulating pump 81, the vacuum pump 82, the first preheater 9, the second preheater 91, the condensed water tank 92 and the condensed water pump 93, the single-tower rectification treatment is realized.
4. Owing to designed the utility model discloses a technical characteristic, in technical characteristic's the effect alone and mutual set, through experimental demonstration, the utility model discloses an each item performance index is 1.7 times at least for current each item performance index, has fine market value through the aassessment.
Still other features associated with the separator 3 for re-elevating the temperature of the tail gas discharge vapor, the compressor unit and the low ethanol concentration recovery device body are all embodiments of the present invention, and the features of the above-described embodiments can be combined arbitrarily, and in order to meet the requirements of patent laws, patent practice rules and examination guidelines, all possible combinations of the features of the above-described embodiments will not be described again.
Above-mentioned embodiment is only the utility model provides a low concentration ethanol recovery unit's a realization form based on MVR, according to the utility model provides a scheme other warp, increase or reduce wherein composition or step, perhaps will the utility model is used for other with the utility model discloses the technical field who is close all belongs to the utility model discloses a protection scope.
Claims (8)
1. The utility model provides a low concentration ethanol recovery unit based on MVR, characterized by: comprises a low-concentration ethanol recovery device body provided with a falling film heat exchanger (2) connected with a rectifying tower (1) and a reboiler (8) connected with the rectifying tower (1), a separator (3) connected with the falling film heat exchanger (2) and used for extracting steam, and a compressor unit connected with the separator (3) and the reboiler (8) respectively and used for increasing the temperature of the steam.
2. The MVR-based low concentration ethanol recovery device of claim 1, wherein: and the separator (3), the compressor unit and the low-concentration ethanol recovery device body are connected with each other in a way of raising the temperature of tail discharge steam.
3. The MVR-based low concentration ethanol recovery device of claim 2, wherein: the separator (3) and the compressor set are connected with the low-concentration ethanol recovery device body in a mode of increasing the temperature of tail discharge steam through MVR.
4. The MVR-based low concentration ethanol recovery device of claim 1, wherein: the compressor unit is provided with a first compressor (4) and a second compressor (5),
or, the low-concentration ethanol recovery device body is arranged to further comprise a first circulating pump (21), a buffer tank (6), a reflux pump (7), a second circulating pump (81), a vacuum pump (82), a first preheater (9), a second preheater (91), a condensed water tank (92) and a condensed water pump (93).
5. The MVR-based low concentration ethanol recovery device of claim 4, wherein: the raw material tank of low-concentration ethanol is connected with the input port of the rectifying tower (1) through a first preheater (9) and a second preheater (91), the output port of the rectifying tower (1) is connected with the finished product tank of ethanol through a falling film heat exchanger (2), the liquid output port of the falling film heat exchanger (2) is connected with the input port of the buffer tank (6) and the output port of the buffer tank (6) is connected with the reflux port of the rectifying tower (1) through a reflux pump (7), the steam output port of the falling film heat exchanger (2) is connected with the first input port of the separator (3) and the output port of the separator (3) is respectively connected with the second input port of the reboiler (8) through a first compressor (4) and a second compressor (5), and the second output port of the reboiler (8) is respectively connected with the heat exchange port of the first preheater (9) and the second input port of the second preheater (9) and the second output port of the reboiler (8) The heat exchange input port portion hookup of pre-heater (91), the heat exchange output port portion of second pre-heater (91) sets up to the input port portion hookup with condensate water pitcher (92), the first output port portion of condensate water pitcher (92) sets up to the third input port portion hookup with reboiler (8) and the second output port portion of condensate water pitcher (92) sets up to the second input port portion hookup through condensate water pump (93) and separator (3), the first input port portion of reboiler (8) sets up to the saturated steam intercommunication with the heat source and the first output port portion of reboiler (8) sets up to the heating source hookup with rectifying column (1), be provided with first circulating pump (21) on falling liquid film heat exchanger (2) and be provided with second circulating pump (81) and vacuum pump (82) respectively on reboiler (8).
6. The MVR-based low concentration ethanol recovery device of claim 5, wherein: the separator (3) is set as a gas-liquid separator, a first input port part and a second input port part are arranged in the middle part of the separator (3), the first input port part of the separator (3) is connected with the falling film heat exchanger (2), the second input port part of the separator (3) is connected with a condensate water pump (93), an output port part is arranged at the top end of the separator (3) and the output port part of the separator (3) is connected with the first compressor (4), a liquid output port part is arranged at the bottom end of the separator (3) and the liquid output port part of the separator (3) is connected with the first circulating pump (21),
or the first compressor (4) and the second compressor (5) are connected in series, the input port of the first compressor (4) is connected with the separator (3), the output port of the first compressor (4) is connected with the input port of the second compressor (5), and the output port of the second compressor (5) is connected with the reboiler (8).
7. The MVR-based low concentration ethanol recovery device of claim 5, wherein: the first preheater (9) and the second preheater (91) are arranged to be plate heat exchangers, the material input port of the first preheater (9) is arranged to be connected with a raw material tank of low-concentration ethanol, the material output port of the first preheater (9) is arranged to be connected with the material input port of the second preheater (91), the material output port of the second preheater (91) is arranged to be connected with the material input port of the rectifying tower (1), the heat exchange input port of the first preheater (9) is arranged to be connected with the output port of the second circulating pump (81) and the heat exchange output port of the first preheater (9) is arranged to be connected with a waste water pipeline, the heat exchange input port of the second preheater (91) is arranged to be connected with the lower end output port of the reboiler (8) and the heat exchange output port of the second preheater (91) is arranged to be connected with the middle input port of the condensed water tank (92),
or, the rectifying tower (1) is set to be a cylindrical tower body and the state of the rectifying tower (1) is set to be atmospheric distillation, the middle part of the rectifying tower (1) is provided with a material input port part and the material input port part of the rectifying tower (1) is set to be connected with the second preheater (91), the top end part of the rectifying tower (1) is respectively provided with an output port part and a reflux port part and the output port part of the rectifying tower (1) is set to be connected with the falling film heat exchanger (2), the reflux port part of the rectifying tower (1) is set to be connected with the reflux pump (7), the lower end part of the rectifying tower (1) is respectively provided with a heating exchange tube and the input port part of the heating exchange tube of the rectifying tower (1) is set to be connected with the reboiler (8), the output port part of the heating exchange tube of the rectifying tower (1) is set to be connected with the second circulating pump (81),
or, the state of the falling film heat exchanger (2) is set to negative pressure, the upper end port part of the falling film heat exchanger (2) is set to be connected with the output port part of the first circulating pump (21) and the lower end port part of the falling film heat exchanger (2) is set to be connected with the input port part of the first circulating pump (21), the upper end of the falling film heat exchanger (2) is provided with an input port part and the input port part of the falling film heat exchanger (2) is set to be connected with the rectifying tower (1), the bottom of the falling film heat exchanger (2) is provided with a liquid output port part and the liquid output port part of the falling film heat exchanger (2) is set to be connected with the buffer tank (6), the lower end of the falling film heat exchanger (2) is provided with a steam output port part and the steam output port part of the falling film heat exchanger (,
or the first circulating pump (21) is set as a high temperature pump and the first circulating pump (21) is set in the utility model, the buffer tank (6) is set as a cylindrical tank body, the upper end of the buffer tank (6) is provided with an input port part and the input port part of the buffer tank (6) is set to be connected with the falling film heat exchanger (2), the bottom end of the buffer tank (6) is provided with an output port part and the output port part of the buffer tank (6) is set to be connected with the reflux pump (7),
or the inlet of the reflux pump (7) is connected with the buffer tank (6) and the inlet of the reflux pump (7) is connected with the rectifying tower (1) and the finished product tank of ethanol,
or, the state of the reboiler (8) is set to normal pressure, the upper end port of the reboiler (8) is set to be connected with the output port of the second circulating pump (81) and the lower end port of the reboiler (8) is set to be connected with the input port of the second circulating pump (81), the middle part of the reboiler (8) is respectively provided with a vacuum port and a third input port and the vacuum port of the reboiler (8) is set to be connected with the vacuum pump (82), the third input port of the reboiler (8) is set to be connected with the condensed water tank (92), the upper end of the reboiler (8) is respectively provided with a first input port and a second input port and the first input port of the reboiler (8) is set to be communicated with the saturated steam of the heat source, the second input port of the reboiler (8) is set to be connected with the second compressor (5), the lower end of the reboiler (8) is respectively provided with a first output port part and a second output port part, the first output port part of the reboiler (8) is connected with the rectifying tower (1), the second output port part of the reboiler (8) is connected with the second preheater (91),
or the second circulating pump (81) is set as a high-temperature pump, the inlet port of the second circulating pump (81) is respectively connected with the rectifying tower (1) and the reboiler (8), the outlet port of the second circulating pump (81) is connected with the reboiler (8),
or the vacuum pump (82) is arranged on the reboiler (8),
or, the condensed water tank (92) is set to be a cylindrical tank body, an input port part is arranged at the middle part of the condensed water tank (92) and the input port part of the condensed water tank (92) is set to be connected with the second preheater (91), a first output port part is arranged at the top end of the condensed water tank (92) and the first output port part of the condensed water tank (92) is set to be connected with the reboiler (8), a second output port part is arranged at the bottom end of the condensed water tank (92) and the second output port part of the condensed water tank (92) is set to be connected with the condensed water pump (93),
or the inlet port of the condensed water pump (93) is connected with the condensed water tank (92) and the outlet port of the condensed water pump (93) is connected with the separator (3).
8. The MVR based low concentration ethanol recovery device of any one of claims 1 to 7, wherein: the system comprises a rectifying tower (1), a falling film heat exchanger (2), a first circulating pump (21), a buffer tank (6), a reflux pump (7), a reboiler (8), a second circulating pump (81), a vacuum pump (82), a first preheater (9), a second preheater (91), a condensed water tank (92), a condensed water pump (93), a separator (3), a first compressor (4) and a second compressor (5), wherein the condensed water tank and the condensed water pump are distributed in a manner of reheating.
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| CN201920271695.5U CN210012779U (en) | 2019-03-05 | 2019-03-05 | MVR-based low-concentration ethanol recovery device |
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| CN201920271695.5U CN210012779U (en) | 2019-03-05 | 2019-03-05 | MVR-based low-concentration ethanol recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879722A (en) * | 2019-03-05 | 2019-06-14 | 肥城金塔机械有限公司 | Low-concentration ethanol recyclable device and method based on MVR |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109879722A (en) * | 2019-03-05 | 2019-06-14 | 肥城金塔机械有限公司 | Low-concentration ethanol recyclable device and method based on MVR |
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Address after: 271608 71 Kang Hui Street, hi tech Industrial Development Zone, Feicheng, Tai'an, Shandong Patentee after: Shandong Jinta Machinery Group Co., Ltd Address before: 271608 71 Kang Hui Street, hi tech Industrial Development Zone, Feicheng, Tai'an, Shandong Patentee before: FEICHENG PYRAMID MACHINERY Co.,Ltd. |
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