CN211060451U - Waste heat recovery device in xylose production - Google Patents
Waste heat recovery device in xylose production Download PDFInfo
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- CN211060451U CN211060451U CN201922281273.9U CN201922281273U CN211060451U CN 211060451 U CN211060451 U CN 211060451U CN 201922281273 U CN201922281273 U CN 201922281273U CN 211060451 U CN211060451 U CN 211060451U
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Abstract
The utility model belongs to the technical field of xylose production, and discloses a waste heat recovery device in xylose production; including flash distillation plant, the evaporimeter, the surface condenser, hybrid condenser and vacuum pump, flash distillation plant is three groups, three steam outlet of flash distillation plant of group and the steam inlet of evaporimeter are connected, the steam outlet of evaporimeter and the steam inlet intercommunication of surface condenser, the steam outlet and the hybrid condenser of surface condenser are connected, the vacuum pump is connected to hybrid condenser one side, the evaporimeter bottom is provided with the condensate pipe, condensate pipe and the condensate water outlet pipe intercommunication of surface condenser, the feed inlet of evaporimeter is connected with the charge-in pipeline that runs through the surface condenser, be provided with cooling water inlet tube and outlet pipe on the surface condenser, the cooling water outlet pipe with the hybrid condenser is connected. The utility model relates to a rationally, compact structure, continuous stable, can carry out effective recycle to the waste heat in the higher preliminary treatment liquid of temperature, washing liquid and the hydrolysate in the xylose production.
Description
Technical Field
The utility model belongs to the technical field of xylose production, concretely relates to waste heat recovery device in xylose production.
Background
Xylose is pentose, has 70% of sweetness of sucrose, is often used as a sweetener and an additive, and is widely applied to the fields of food, chemical industry, medicine and the like. In industrial production, it is made up by using corn cob and bagasse as raw material through the processes of hydrolysis, purification, evaporation, crystallization, centrifugation and drying. Because it is extracted from the plant waste, in order to reduce the impurity content in the xylose liquid, the raw material is generally required to be pretreated and washed before hydrolysis, and a large amount of pretreatment liquid and washing waste liquid with the temperature of 115 plus 125 ℃ are generated in the process, if the pretreatment liquid and the washing waste liquid are directly discharged, a large amount of heat energy loss and energy waste are caused, and the waste liquid is easy to generate a natural flash evaporation phenomenon in the discharging process, and flash evaporation gas enters the atmosphere, so that the environment pollution is further caused; in addition, the hydrolyzed hydrolysate has a high temperature, and in actual production, because the temperature of the hydrolysate needs to be reduced to below 75 ℃ during subsequent decolorization treatment, a large amount of underground water is needed to be used for cooling the high-temperature hydrolysate, so that the production cost is further increased. Therefore, how to effectively recycle the residual heat in the xylose production process has become an obstacle to the development of low consumption and low energy consumption of xylose production.
In recent years, although there are some reports about waste heat recovery devices in xylose production, most of the existing waste heat recovery devices have single structure and low efficiency, so that the waste heat of waste liquid in xylose production is difficult to be effectively utilized, and the production requirements of energy conservation and emission reduction are not met. Therefore, the development and design of the device capable of fully recycling the waste heat in the xylose production waste liquid have very important practical significance.
Disclosure of Invention
To the problem that exists among the prior art, the utility model aims at providing a waste heat recovery device in xylose production of recovery efficiency height, stable performance, energy-concerving and environment-protective.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a waste heat recovery device in xylose production comprises a flash evaporation device, an evaporator, a surface condenser, a mixed condenser and a vacuum pump, wherein the flash evaporation device comprises three groups, namely a pretreatment liquid flash evaporation device, a washing water flash evaporation device and a hydrolysate flash evaporation device in sequence, the steam outlet of the three groups of flash evaporation devices is connected with the steam inlet of the evaporator, the steam outlet of the evaporator is communicated with the steam inlet of the surface condenser, the steam outlet of the surface condenser is connected with the mixed condenser, one side of the mixed condenser is connected with the vacuum pump through a pipeline, the bottom of the evaporator is provided with a condensate pipe, the condensate pipe is communicated with a condensate water outlet pipeline of the surface condenser, the feed inlet of the evaporator is connected with a feed pipeline which runs through the surface condenser, and the discharge outlet of the evaporator is connected with the next process, and the surface condenser is also provided with a cooling water inlet pipe and a cooling water outlet pipe, and the cooling water outlet pipe is connected with the hybrid condenser.
Further, the three flash evaporation devices are all four-stage flash evaporation and comprise a first-stage flash evaporator, a second-stage flash evaporator, a third-stage flash evaporation tank and a fourth-stage flash evaporator which are connected in series in a stepped manner from top to bottom.
Further, the evaporimeter be the first effect evaporimeter, two effect evaporimeters, three effect evaporimeters and the four effect evaporimeters of establishing ties each other, every effect evaporimeter is including the heating chamber and the disengagement chamber that communicate each other, the steam outlet of one-level flash vessel is connected with the steam inlet of one effect evaporimeter heating chamber, the steam outlet of second grade flash vessel is connected with the steam inlet of two effect evaporimeter heating chamber, the steam outlet of tertiary flash vessel is connected with the steam inlet of three effect evaporimeter heating chamber, the steam outlet of level four flash vessel is connected with the steam inlet of four effect evaporimeter heating chamber.
Furthermore, a steam outlet of the first-effect separation chamber is communicated with a steam inlet of the second-effect evaporator, a steam outlet of the second-effect separation chamber is communicated with a steam inlet of the third-effect evaporator, a steam outlet of the third-effect separation chamber is communicated with a steam inlet of the fourth-effect evaporator, and a steam outlet of the fourth-effect separation chamber is communicated with a steam inlet of the surface condenser.
Further, the feed inlet at one-effect evaporator heating chamber top with run through surface condenser's charge-in pipeline is connected, the bottom discharge gate of one-effect evaporator heating chamber and separator is connected to the feed inlet at two-effect heating chamber top through one-effect material pump, the bottom discharge gate of two-effect evaporator heating chamber and separator is connected to the feed inlet at three-effect heating chamber top through two-effect material pump, the bottom discharge gate of three-effect evaporator heating chamber and separator is connected to the feed inlet at four-effect heating chamber top through three-effect material pump, the bottom discharge gate of four-effect evaporator heating chamber and separator passes through four-effect material pump and connects next process.
Further, each effect of evaporator heating chamber bottom is provided with the condensate pipe, the condensate pipe that first effect of evaporator heating chamber bottom set up is connected with second effect of evaporator heating chamber bottom, the condensate pipe that second effect of evaporator heating chamber bottom set up is connected with third effect of evaporator heating chamber bottom, the condensate pipe that third effect of evaporator heating chamber bottom set up is connected with fourth effect of evaporator heating chamber bottom, the condensate pipe that fourth effect of evaporator heating chamber bottom set up with surface condenser's condensate water outlet pipe intercommunication.
Furthermore, the vacuum pump is also connected with the heating chambers of the evaporator respectively through pipelines.
Compared with the prior art, the utility model has the advantages that:
1. the utility model provides a waste heat recovery device in xylose production reasonable in design, compact structure, it is continuous stable, can be to the higher preliminary treatment liquid of temperature in the xylose production, waste heat in wash water liquid and the hydrolyzate effectively retrieves, be used for carrying out evaporative concentration to the material, heat energy loss and energy waste have not only been reduced, and the production cost is reduced, and the consumption of coal and steam has been saved greatly, every retrieves the above-mentioned solution waste heat of a ton, can reduce the consumption of 0.86 ton 140 ℃ 0.4 megapascal vapor, and is more energy-concerving and environment-protective.
2. The utility model provides a waste heat recovery device adopts four-stage flash distillation cooperation four-effect evaporator to carry out waste heat recovery in the xylose production, the feed liquid series connection of flash vessel at different levels, the secondary steam pipe of every level flash vessel is connected with the heating chamber of corresponding four-effect evaporator respectively, not only make each group's flash distillation plant's ejection of compact temperature lower, release more waste heat, heat energy obtains abundant recycle, and be provided with filter equipment at each group's flash distillation plant's charge-in pipeline, can effectively prevent pretreatment liquid, the residue among wash water liquid and the hydrolysate gets into and blocks up the vapour flash distillation, more can guarantee the continuous steady operation of device.
3. The utility model provides a waste heat recovery device in xylose production carries out waste heat recovery to the hydrolysate, and the hydrolysate is concentrated too, and the hydrolysate temperature drops to below 60 ℃, thereby saves the step that need add water to the hydrolysate and cool down before the decoloration treatment in traditional xylose production, has greatly reduced the consumption of industrial water; and the condensed water with certain temperature generated in the evaporator is merged with the condensed water generated in the surface condenser through the condensed water pipe and then recycled for hydrolysis, thereby being more beneficial to saving water and steam consumption.
4. The utility model provides a four-effect evaporator still is connected with surface condenser, mixing condenser, vapour and liquid separator and vacuum pump among the waste heat recovery device in the xylose production, and the material inlet pipe passes surface condenser and is connected with the preheating chamber of evaporimeter, the design makes the secondary steam and the material that four-effect evaporator separating chamber produced carry out the heat transfer in surface condenser like this, carry out waste heat recovery more fully, be convenient for moreover with the noncondensable gas in the secondary steam from liquid quick separation, separation back water carries out recycle.
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.
FIG. 1 is a schematic structural view of the waste heat recovery device in xylose production.
Fig. 2 is an enlarged schematic view of a local connection structure of an evaporator according to the present invention.
In the figure: 1-surface condenser, 2-mixing condenser, 3-vacuum pump, 4-steam inlet, 5-condensate pipe, 6-condensate water outlet pipe, 7-feeding pipe, 8-water inlet pipe, 9-water outlet pipe, 10-first stage flash evaporator, 11-second stage flash evaporator, 12-third stage flash evaporator, 13-fourth stage flash evaporator, 14-pretreatment liquid feeding pipe, 15-washing water feeding pipe, 16-hydrolysate feeding pipe, 17-filtering device, 18-discharging pipe, 19-first effect evaporator, 20-second effect evaporator, 21-third effect evaporator, 22-fourth effect evaporator, 23-first effect evaporator heating chamber, 24-second effect evaporator heating chamber, 25-third effect evaporator heating chamber, 26-fourth effect evaporator heating chamber, 27-steam boiler, 28-single-effect evaporator separating chamber, 29-double-effect evaporator separating chamber, 30-triple-effect evaporator separating chamber, 31-four-effect evaporator separating chamber, 32-feed inlet, 33-single-effect material pump, 34-double-effect material pump, 35-triple-effect material pump, 36-four-effect material pump, 37-single-effect evaporator preheating chamber, 38-double-effect evaporator preheating chamber, 39-triple-effect evaporator preheating chamber, 40-four-effect evaporator preheating chamber, 41-feed pump, 42-single-effect preheating chamber condensate water outlet pipe, 43-double-effect preheating chamber condensate water outlet pipe, 44-triple-effect preheating chamber condensate water outlet pipe, 45-four-effect preheating chamber condensate water outlet pipe, 46-material circulation return pipeline, 47-single-effect heating chamber condensate water pipe, 48-two-effect heating chamber condensate pipe, 49-three-effect heating chamber condensate pipe, 50-four-effect heating chamber condensate pipe, 51-condensate pump, 52-vacuum pipeline and 53-gas-liquid separator.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to specific embodiments. It is to be understood that the embodiments described are only some embodiments of the invention, and 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.
A waste heat recovery device in xylose production comprises three groups of flash evaporation devices, an evaporator, a surface condenser 1, a mixed condenser 2 and a vacuum pump 3, wherein the three groups of flash evaporation devices are a pretreatment liquid flash evaporation device, a washing water flash evaporation device and a hydrolysate flash evaporation device in sequence; the steam outlets of the three groups of flash evaporation devices are connected with the steam inlet of the evaporator, the steam outlet of the evaporator is communicated with the steam inlet 4 of the surface condenser 1, the steam outlet 4 of the surface condenser 1 is connected with the mixing condenser 2, one side of the mixing condenser 2 is connected with the vacuum pump 3 through a pipeline, a condensate pipe 5 is arranged at the bottom of the evaporator, the condensate pipe 5 is communicated with a condensate water outlet pipeline 6 of the surface condenser 1, the feed inlet of the evaporator is connected with a feed pipeline 7 which runs through the surface condenser, the discharge outlet of the evaporator is connected with the next working procedure, still be provided with cooling water inlet tube 8 and cooling water outlet pipe 9 on the surface condenser 1, cooling water outlet pipe 9 with hybrid condenser 2 is connected, is convenient for carry out circulation recycle to the cooling water.
Further, the three groups of flash evaporation devices are four-stage flash evaporation and comprise a first-stage flash evaporator 10, a second-stage flash evaporator 11, a third-stage flash evaporation tank 12 and a fourth-stage flash evaporator 13 which are connected in series in a stepped manner from top to bottom, each group of first-stage flash evaporators 10 are respectively connected with a corresponding pretreatment liquid feeding pipe 14, a washing water feeding pipe 15 and a hydrolysate feeding pipe 16, each feeding pipe is provided with a filtering device 17, each filtering device 17 is a screen filter or a screen basket filter to prevent liquid residues from entering each feeding pipe to block flash evaporation steam, and the bottom of each group of fourth-stage flash evaporators is provided with a discharging pipe 18.
Further, the evaporimeter be the first effect evaporimeter 19, two effect evaporimeter 20, three effect evaporimeter 21 and the four effect evaporimeter 22 of establishing ties each other, every effect evaporimeter all includes heating chamber and the disengagement chamber of intercommunication each other, the steam outlet of one-level flash vessel 10 is connected with the steam inlet of one effect evaporimeter 19 heating chamber 23, the steam outlet of second grade flash vessel 11 is connected with the steam inlet of two effect evaporimeter 20 heating chamber 24, the steam outlet of tertiary flash vessel 12 is connected with the steam inlet of three effect evaporimeter 21 heating chamber 25, the steam outlet of level four flash vessel 13 is connected with the steam inlet of four effect evaporimeter 22 heating chamber 26.
Furthermore, a steam boiler 27 is connected to one side of the heating chamber 23 of the one-effect evaporator 19 through a pipeline, so that steam is provided in an auxiliary manner according to the entering amount of specific materials to be produced, and the evaporation and concentration of the evaporated materials are ensured to be more thorough.
Further, a steam outlet of a separation chamber 28 of the first-effect evaporator 19 is communicated with a steam inlet of a heating chamber 24 of the second-effect evaporator 20, a steam outlet of a separation chamber 29 of the second-effect evaporator 20 is communicated with a steam inlet of a heating chamber 25 of the third-effect evaporator 21, a steam outlet of a separation chamber 30 of the third-effect evaporator 21 is communicated with a steam inlet of a heating chamber 26 of the fourth-effect evaporator 22, and a steam outlet of a separation chamber 31 of the fourth-effect evaporator 22 is communicated with a steam inlet of the surface condenser 1.
Further, a feed inlet 32 at the top of a heating chamber 23 of the first-effect evaporator 19 is connected with a feed pipeline 7 penetrating through the surface condenser 1, bottom discharge outlets of the heating chamber 23 of the first-effect evaporator 19 and a separation chamber 28 are connected to a feed inlet at the top of a heating chamber 24 of the second-effect evaporator 20 through a first-effect material pump 33, bottom discharge outlets of the heating chamber 24 of the second-effect evaporator 20 and a separation chamber 29 are connected to a feed inlet at the top of a heating chamber 25 of the third-effect evaporator 21 through a second-effect material pump 34, bottom discharge outlets of the heating chamber 25 of the third-effect evaporator 21 and a separation chamber 30 are connected to a feed inlet at the top of a heating chamber 26 of the fourth-effect evaporator 22 through a third-effect material pump 35, and bottom discharge outlets of the heating chamber 26 of the.
Further, each effect evaporator still include the preheating chamber that preheats the material, each effect evaporator preheating chamber passes through pipeline and each effect evaporator heating chamber intercommunication, the discharge gate of one effect evaporator 19 preheating chamber 37 and the feed inlet at one effect evaporator 19 heating chamber 23 top intercommunication, the feed inlet of one effect evaporator 19 preheating chamber 37 with the discharge gate of two effect evaporator 20 preheating chamber 38 intercommunication, the feed inlet of two effect evaporator 20 preheating chamber 38 with the discharge gate of three effect evaporator 21 preheating chamber 39 intercommunication, the feed inlet of three effect evaporator 21 preheating chamber 39 with the discharge gate of four effect evaporator 22 preheating chamber 40 intercommunication, four effect evaporator 22 preheating chamber 40 feed inlet with run through the charge-in pipeline 7 of surface condenser 1 is connected, charge-in pipeline 7 is connected with charge-in pump 41.
Furthermore, a condensate water outlet pipe is arranged at the bottom of each preheating chamber of the single-effect evaporators, a condensate water outlet pipe 42 arranged at the bottom of the preheating chamber 37 of the single-effect evaporator 19 is connected with the bottom of the preheating chamber 38 of the second-effect evaporator 20, a condensate water outlet pipe 43 arranged at the bottom of the preheating chamber 38 of the second-effect evaporator 20 is connected with the bottom of the preheating chamber 39 of the third-effect evaporator 21, a condensate water outlet pipe 44 arranged at the bottom of the preheating chamber 39 of the third-effect evaporator 21 is connected with the bottom of the preheating chamber 40 of the fourth-effect evaporator 22, and a condensate water outlet pipe 45 arranged at the bottom of the preheating chamber 40 of the fourth-effect evaporator 22 is.
Furthermore, a material circulating and returning pipeline 46 is arranged between two adjacent feed inlets at the top of the heating chamber of each effect evaporator, so that the materials can be fully evaporated.
Further, each effect of evaporator heating chamber bottom is provided with the condensate pipe, the condensate pipe 47 that first effect of evaporator 19 heating chamber 23 bottom set up is connected with second effect of evaporator 20 heating chamber 24 bottom, the condensate pipe 48 that second effect of evaporator 20 heating chamber 24 bottom set up is connected with third effect of evaporator 21 heating chamber 25 bottom, the condensate pipe 49 that third effect of evaporator 21 heating chamber 25 bottom set up is connected with fourth effect of evaporator 22 heating chamber 26 bottom, the condensate pipe 50 that fourth effect of evaporator 22 heating chamber 26 bottom set up with the condensate water outlet pipe way 6 intercommunication of surface condenser 1, condensate water outlet pipe way 6 is connected with condensate water pump 51 to in the convenience will collect the condensate water and carry to other processes utilization fast.
Further, the vacuum pump 3 is a water ring vacuum pump, and the vacuum pump 3 is also connected to the heating chambers of the respective evaporators via vacuum pipes 52.
Furthermore, the vacuum pipelines are divided into two groups and are respectively arranged on the upper side wall and the lower side wall of the heating chamber of each effect evaporator, so that the effect evaporators can be vacuumized quickly, and simultaneously, the non-condensable gas generated in the heating chambers of all the stages of evaporators in the evaporation concentration process can be pumped out quickly.
Further, the mixing condenser 2 with still be provided with vapour and liquid separator 53 between the vacuum pump 3 to in from liquid quick separation with the noncondensable gas in the mixing condenser 2, 2 bottoms of mixing condenser are provided with the liquid outlet, vapour and liquid separator 53 the liquid outlet with 2 liquid outlet intercommunication of mixing condenser.
The working principle of the utility model is as follows:
the pretreatment liquid, the washing liquid and the hydrolysate are respectively filtered by a filtering device and then are pumped into a corresponding four-stage flash evaporation device which is connected in series in a step shape from top to bottom through a pretreatment liquid feeding pipe 14, a washing water feeding pipe 15 and a hydrolysate feeding pipe 16, first-stage flash evaporation steam of the pretreatment liquid, the washing liquid and the hydrolysate is combined and then enters a heating chamber 23 of a first-effect evaporator 19 as a heat source, second-stage flash evaporation steam is combined and then enters a heating chamber 24 of a second-effect evaporator 20 as a heat source, third-stage flash evaporation steam is combined and then enters a heating chamber 25 of a third-effect evaporator 21 as a heat source, and fourth-; the material is pumped into a feeding pipeline 7 by a feeding pump 41, enters a four-effect evaporator preheating chamber after heat exchange with secondary steam from a separating chamber 31 of a four-effect evaporator 22 in a surface condenser 1, then sequentially passes through a three-effect evaporator 21 preheating chamber 39, a two-effect evaporator 20 preheating chamber 38 and a one-effect evaporator 19 preheating chamber 37 for preheating, condensed water generated in the preheating process flows out from a condensed water outlet pipe at the bottom of each-effect preheating chamber, after the preheating is finished, the material enters the one-effect evaporator from a feeding hole at the top of a heating chamber 23 of the one-effect evaporator 19 for primary evaporation concentration, after the concentration is finished, material liquid flows out from a heating chamber 23 of the one-effect evaporator 19 and a bottom discharging hole of the separating chamber 28, one part of the material liquid is pumped into the two-effect evaporator 20 for secondary evaporation concentration by a one-effect material pump 33, and the other part of the material flows, and the secondary steam generated by the separation chamber 28 of the first-effect evaporator 19 flows into the heating chamber 24 of the second-effect evaporator 20 to be used as a heat source, and so on, after the material liquid is evaporated and concentrated by the fourth-effect evaporator 22, the material liquid flows into the next process by the four-effect material pump 36 through the heating chamber 26 of the fourth-effect evaporator 22 and the bottom discharge port of the separation chamber 31, the condensed water generated by each-effect evaporator flows out from the condensed water pipe at the bottom of each-effect heating chamber to be combined with the condensed water generated in the surface condenser 1 for recycling, the secondary steam generated by the separation chamber 31 of the fourth-effect evaporator 22 flows into the surface condenser 1 to exchange heat with the material in the feeding pipeline 7 for cooling, the steam after heat exchange enters the mixing condenser 2 and the gas-liquid separator 53 connected with the mixing condenser for gas-liquid separation, and the condensed water.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A waste heat recovery device in xylose production is characterized in that: including flash distillation plant, evaporimeter, surface condenser, hybrid condenser and vacuum pump, flash distillation plant be three groups, be pretreatment liquid flash distillation plant, wash water flash distillation plant and hydrolysate flash distillation plant in proper order, the steam outlet of three flash distillation plant of group is connected with the steam inlet of evaporimeter, the steam outlet of evaporimeter with the steam inlet intercommunication of surface condenser, the steam outlet of surface condenser with hybrid condenser connects, hybrid condenser one side pass through the pipeline with vacuum pump connection, the evaporimeter bottom is provided with the condensate pipe, the condensate pipe with the condensate water outlet pipe intercommunication of surface condenser, the feed inlet of evaporimeter is connected with the charge-in pipeline that runs through surface condenser, next process is connected to the discharge gate of evaporimeter, still be provided with cooling water inlet tube and cooling water outlet pipe on the surface condenser, and the cooling water outlet pipe is connected with the mixing condenser.
2. The apparatus for recovering waste heat in xylose production according to claim 1, wherein: three flash distillation plant of group be the level four flash distillation, be one-level flash vessel, second grade flash vessel, tertiary flash tank ware and the level four flash vessel of echelonment series connection including top-down, each group of one-level flash vessel is connected with corresponding pretreatment liquid inlet pipe, wash water inlet pipe and hydrolyzate inlet pipe respectively, is provided with filter equipment on each inlet pipe, each group of level four flash vessel bottom is provided with the discharging pipe.
3. The apparatus for recovering waste heat in xylose production according to claim 1, wherein: the evaporator comprises a first-effect evaporator, a second-effect evaporator, a third-effect evaporator and a fourth-effect evaporator which are connected in series, each effect evaporator comprises a heating chamber and a separation chamber which are communicated with each other, a steam outlet of the first-stage flash evaporator is connected with a steam inlet of the heating chamber of the first-effect evaporator, a steam outlet of the second-stage flash evaporator is connected with a steam inlet of the heating chamber of the second-effect evaporator, a steam outlet of the third-stage flash evaporator is connected with a steam inlet of the heating chamber of the third-effect evaporator, and a steam outlet of the fourth-stage flash evaporator is connected with a steam inlet of the heating chamber of the fourth; the steam outlet of the first-effect evaporator separating chamber is communicated with the steam inlet of the second-effect evaporator heating chamber, the steam outlet of the second-effect evaporator separating chamber is communicated with the steam inlet of the third-effect evaporator heating chamber, the steam outlet of the third-effect evaporator separating chamber is communicated with the steam inlet of the fourth-effect evaporator heating chamber, and the steam outlet of the fourth-effect evaporator separating chamber is communicated with the steam inlet of the surface condenser.
4. The apparatus for recovering waste heat in xylose production according to claim 3, wherein: the feed inlet at one effect evaporimeter heating chamber top with run through surface condenser's charge-in pipeline is connected, the bottom discharge gate of one effect evaporimeter heating chamber and separator is connected to the feed inlet at two effect heating chamber tops through an effect material pump, the bottom discharge gate of two effect evaporimeter heating chamber and separator is connected to the feed inlet at three effect heating chamber tops through two effect material pumps, the bottom discharge gate of three effect evaporimeter heating chamber and separator is connected to the feed inlet at four effect heating chamber tops through three effect material pumps, the bottom discharge gate of four effect evaporimeter heating chamber and separator passes through four effect material pumps and connects next process.
5. The apparatus for recovering waste heat in xylose production according to claim 4, wherein: each effect evaporimeter still include the preheating chamber that preheats the material, each effect evaporimeter preheating chamber passes through pipeline and each effect evaporimeter heating chamber intercommunication, the discharge gate of one effect evaporimeter preheating chamber and the feed inlet at one effect evaporimeter heating chamber top intercommunication, the feed inlet of one effect evaporimeter preheating chamber with the discharge gate intercommunication of two effect evaporimeter preheating chamber, the feed inlet of two effect evaporimeter preheating chamber with the discharge gate intercommunication of three effect evaporimeter preheating chamber, the feed inlet of three effect evaporimeter preheating chamber with the discharge gate intercommunication of four effect evaporimeter preheating chamber, four effect evaporimeter preheating chamber feed inlet with run through the charge-in pipeline of surface condenser is connected, charge-in pipeline is connected with the charge-in pump.
6. The apparatus for recovering waste heat in xylose production according to claim 5, wherein: the device comprises a plurality of effect evaporator preheating chambers, wherein each effect evaporator preheating chamber is provided with a condensate water outlet pipe at the bottom, the condensate water outlet pipe arranged at the bottom of the effect evaporator preheating chamber is connected with the bottom of the second effect evaporator preheating chamber, the condensate water outlet pipe arranged at the bottom of the second effect evaporator preheating chamber is connected with the bottom of the third effect evaporator preheating chamber, the condensate water outlet pipe arranged at the bottom of the third effect evaporator preheating chamber is connected with the bottom of the fourth effect evaporator preheating chamber, and the condensate water outlet pipe arranged at the bottom of the fourth effect evaporator preheating chamber is communicated with the condensate water outlet pipeline of a surface.
7. The apparatus for recovering waste heat in xylose production according to claim 4, wherein: and a material circulating and refluxing pipeline is also arranged between two adjacent feed inlets at the top of the heating chamber of each effect evaporator.
8. The apparatus for recovering waste heat in xylose production according to claim 3, wherein: each effect evaporator heating chamber bottom is provided with the condensate pipe, the condensate pipe that one effect evaporator heating chamber bottom set up is connected with two effect evaporator heating chamber bottom, the condensate pipe that two effect evaporator heating chamber bottom set up is connected with three effect evaporator heating chamber bottom, the condensate pipe that three effect evaporator heating chamber bottom set up is connected with four effect evaporator heating chamber bottom, the condensate pipe that four effect evaporator heating chamber bottom set up with surface condenser's condensate water outlet pipe way intercommunication, condensate water outlet pipe way is connected with condensate pump.
9. The apparatus for recovering waste heat in xylose production according to claim 1, wherein: the vacuum pump is a water ring vacuum pump, and is also respectively connected with the heating chambers of the evaporators through pipelines.
10. The apparatus for recovering waste heat in xylose production according to claim 1, wherein: the mixing condenser with still be provided with vapour and liquid separator between the vacuum pump, the mixing condenser bottom is provided with the liquid outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922281273.9U CN211060451U (en) | 2019-12-18 | 2019-12-18 | Waste heat recovery device in xylose production |
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| CN201922281273.9U CN211060451U (en) | 2019-12-18 | 2019-12-18 | Waste heat recovery device in xylose production |
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| CN211060451U true CN211060451U (en) | 2020-07-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181582A (en) * | 2022-07-07 | 2022-10-14 | 华北电力大学（保定） | Two-stage hydrothermal liquefaction waste heat utilization system and method |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115181582A (en) * | 2022-07-07 | 2022-10-14 | 华北电力大学（保定） | Two-stage hydrothermal liquefaction waste heat utilization system and method |
| CN115181582B (en) * | 2022-07-07 | 2023-06-16 | 华北电力大学（保定） | Two-stage hydrothermal liquefaction waste heat utilization system and method |
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Address after: 456150 middle section of Zhongpin Avenue, Tangyin County, Anyang City, Henan Province Patentee after: Henan Yuxin sugar alcohol Co.,Ltd. Address before: 456150 Changhong Road, Tangyin County, Anyang City, Henan Province Patentee before: ANYANG CITY YUXIN XYLITOL TECHNOLOGY Co.,Ltd. |