CN117883804A - Concentrated distillation production system - Google Patents

Abstract

The present disclosure provides a concentrated distillation production system. The concentrating and distilling production system comprises a concentrating device, wherein the concentrating device comprises a mother solution storage tank, distilling reaction kettles and vacuum pumps, the feeding end of each distilling reaction kettle is communicated with the discharging end of the mother solution storage tank, the vacuum pumps are communicated with the air outlet ends of each distilling reaction kettle, and the concentrating device also comprises a plurality of vacuum valves which are arranged on the air outlet ends of the distilling reaction kettles in a one-to-one correspondence manner; the concentrated distillation production system is produced by a concentrated distillation method, and the concentrated distillation method comprises the following steps: storing the mother liquor into a mother liquor storage tank; mother liquor of the mother liquor storage tank is conveyed into each distillation reaction kettle; heating the corresponding mother liquor through each distillation reaction kettle; starting a vacuum pump; when the mother liquor temperature of each distillation reaction kettle is kept at a preset temperature, a corresponding vacuum valve is opened, so that the vacuum degree of each distillation reaction kettle is kept at the preset vacuum degree. Thus, the quality stability of the purified product is improved.

Description

Concentrated distillation production system

Technical Field

The disclosure relates to the technical field of distillation, in particular to a concentrated distillation production system.

Background

Distillation is a thermodynamic separation process that utilizes the difference in boiling points of the components of a mixed liquid or liquid-solid system to vaporize the lower boiling components and recondensing to separate the entire components, a combination of both the vaporizing and condensing unit operations.

In the production of industrial salt, it is common to vacuum distill the mother liquor to a distillation production process, distill the mother liquor by a distillation apparatus to obtain a concentrated mother liquor, and then vacuum distill the concentrated mother liquor by a subsequent separation treatment to obtain industrial salt, for example, using a vacuum distillation system disclosed in document CN204219820U to obtain industrial salt.

In the related art, in order to improve the production efficiency of industrial salt, vacuum distillation is generally performed using a plurality of distillation apparatuses, for example, a vacuum distillation system used in the production of titanium sponge disclosed in CN 201915135U.

However, since each distillation apparatus operates independently, the concentration of the purified product obtained by each distillation apparatus is slightly different, resulting in unstable quality of the purified product.

In order to improve the quality stability of the purified product, for example, in a vacuum distillation system disclosed in document CN114042331a, a suction system makes the vacuum degree of a plurality of distillation apparatuses substantially uniform via a main pipe and a plurality of branch pipes, so that the product quality of the substance purified by the plurality of distillation apparatuses is substantially uniform in the case where the plurality of distillation apparatuses purify the same substance in a vacuum state, thereby improving the stability of the quality of the substance purified by the plurality of distillation apparatuses.

The technical scheme disclosed in the above-mentioned reference document does improve the quality stability of the purified product, but because the mother liquor content in different distillation apparatuses is slightly different, the heating rates of different distillation apparatuses are not consistent, so that the initial distillation temperatures of different distillation apparatuses are different, that is, in the initial stage of distillation, the distillation temperatures of different distillation apparatuses are different, so that the concentration of the purified product obtained by different distillation apparatuses is still different, and the quality stability of the purified product still has room for improvement.

Disclosure of Invention

The aim of the present disclosure is to overcome the shortcomings in the prior art and provide a concentrated distillation production system with more stable quality of the purified product.

The aim of the disclosure is achieved by the following technical scheme:

a concentrating and distilling production system comprises a concentrating device, wherein the concentrating device comprises a mother solution storage tank, a distilling reaction kettle and a vacuum pump, the feeding end of each distilling reaction kettle is communicated with the discharging end of the mother solution storage tank, the vacuum pump is communicated with the air outlet end of each distilling reaction kettle,

the concentration device further comprises a plurality of vacuum valves, and the vacuum valves are arranged on the air outlet ends of the distillation reaction kettles in a one-to-one correspondence manner; the concentrated distillation production system is produced by a concentrated distillation method comprising the steps of:

storing mother liquor into the mother liquor storage tank;

the mother liquor of the mother liquor storage tank is conveyed into each distillation reaction kettle;

heating the corresponding mother liquor through each distillation reaction kettle;

starting the vacuum pump;

when the mother liquor temperature of each distillation reaction kettle is kept at a preset temperature, opening the corresponding vacuum valve to keep the vacuum degree of each distillation reaction kettle at the preset vacuum degree, so that each distillation reaction kettle is subjected to distillation.

In one embodiment, the concentrated distillation production system further comprises a solid-liquid separation device, wherein the solid-liquid separation device is communicated with the discharge end of each distillation reaction kettle.

In one embodiment, the solid-liquid separation device comprises a thickener, and the feeding end of the thickener is communicated with the discharging end of each distillation reaction kettle.

In one embodiment, the solid-liquid separation device further comprises a centrifuge, wherein the feeding end of the centrifuge is communicated with the discharging end of the thickener, and the centrifuge is provided with a solid finished product outlet and a mother liquor outlet.

In one embodiment, the solid-liquid separation device further comprises a ton barrel, which is in communication with the solid product discharge outlet.

In one embodiment, the solid-liquid separation device further comprises a mother liquor returning tank, wherein the feeding end of the mother liquor returning tank is communicated with the mother liquor discharge port, and the discharging end of the mother liquor returning tank is communicated with the feeding end of each distillation reaction kettle.

In one embodiment, the concentrated distillation production system further comprises a heat sink disposed on the input pipe of the vacuum pump.

In one embodiment, the concentrated distillation production system further comprises a vacuum buffer tank having a buffer air inlet, a buffer air outlet and a buffer drain outlet, the buffer air inlet is in communication with the output of the heat sink, and the buffer air outlet is in communication with the input of the vacuum pump.

In one embodiment, the concentrated distillation production system further comprises a condensing tank, an input end of the condensing tank being in communication with an output end of the vacuum pump.

In one embodiment, the concentrated distillation production system further comprises a condensate storage tank in communication with the condensate tank;

the condensed water storage tank is also communicated with the buffer drain outlet.

Compared with the prior art, the method has at least the following advantages:

each distillation reaction kettle heats the mother liquor, when the temperature of the mother liquor of each distillation reaction kettle reaches a preset temperature, a corresponding vacuum valve is opened, so that a vacuum pump vacuumizes the corresponding distillation reaction kettle, and the corresponding distillation reaction kettle is kept at the preset vacuum degree; because the air outlet end of each distillation reaction kettle is communicated with the vacuum pump, namely the plurality of distillation reaction kettles share a vacuum air source, after all the vacuum valves are opened, the vacuum degree of the plurality of distillation reaction kettles can be kept consistent in a shorter time, so that the plurality of distillation reaction kettles distill under the same vacuum degree and the same temperature; because the distillation reaction kettles can be distilled under the same vacuum degree and the same temperature, the concentration consistency of the purified matters, namely the concentrate, obtained by each distillation reaction kettle is higher, and the quality stability of the purified matters is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present disclosure and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.

FIG. 1 is a schematic diagram of a concentrated distillation production system according to an embodiment;

fig. 2 is a schematic view showing a partial structure of the concentration distillation production system shown in fig. 1.

Reference numerals: 10 a concentrated distillation production system; 100 concentrating devices; 110 mother liquor storage tanks; 120 distillation reaction kettle; 130 vacuum pump; 140 vacuum valve; 200 solid-liquid separation device; 210 a thickener; 220 centrifuges; 230 ton barrels; 240 mother liquor return tank; 300 a heat sink; 310 a cooling tower; 320 cooling tanks; 330 plate radiator; 400 vacuum buffer tanks; 500 condensing tanks; 600 condensate storage tanks; 610 cleaning the valve; 700 sewage purifying device; 710 a sewage temporary storage tank; 720 a sewage neutralization tank; 730 reverse osmosis tank; 740 adsorption module; 750 a sewage tank.

Detailed Description

In order that the disclosure may be understood, a more complete description of the disclosure will be rendered by reference to the appended drawings. Preferred embodiments of the present disclosure are shown in the drawings. This disclosure may, however, be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used in the description of the disclosure herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The utility model provides a concentrated distillation production system includes enrichment facility, enrichment facility include mother liquor holding vessel, distillation reation kettle and vacuum pump, have stored the mother liquor in the mother liquor holding vessel, and the feed end of each distillation reation kettle is linked together with the discharge end of mother liquor holding vessel, and the vacuum pump is linked together with the end of giving vent to anger of each distillation reation kettle, and enrichment facility still includes a plurality of vacuum valves, and a plurality of vacuum valves one-to-one set up on the end of giving vent to anger of a plurality of distillation reation kettles.

The present disclosure also provides a concentration distillation method by which a concentration distillation production system is produced, the concentration distillation method comprising the steps of: storing the mother liquor into a mother liquor storage tank; mother liquor of the mother liquor storage tank is conveyed into each distillation reaction kettle; heating the corresponding mother liquor through each distillation reaction kettle; starting a vacuum pump; when the mother liquor temperature of each distillation reaction kettle is kept at a preset temperature, a corresponding vacuum valve is opened, so that the vacuum degree of each distillation reaction kettle is kept at the preset vacuum degree, and each distillation reaction kettle is subjected to distillation.

According to the concentrating and distilling production system and the concentrating and distilling method, each distilling reaction kettle heats the mother liquor, when the temperature of the mother liquor of each distilling reaction kettle reaches the preset temperature, the corresponding vacuum valve is opened, so that the corresponding distilling reaction kettle is vacuumized by the vacuum pump, and the corresponding distilling reaction kettle is kept at the preset vacuum degree; because the air outlet end of each distillation reaction kettle is communicated with the vacuum pump, namely the plurality of distillation reaction kettles share a vacuum air source, after all the vacuum valves are opened, the vacuum degree of the plurality of distillation reaction kettles can be kept consistent in a shorter time, so that the plurality of distillation reaction kettles distill under the same vacuum degree and the same temperature; because the distillation reaction kettles can be distilled under the same vacuum degree and the same temperature, the concentration consistency of the purified matters, namely the concentrate, obtained by each distillation reaction kettle is higher, and the quality stability of the purified matters is improved.

In order to better understand the technical scheme and beneficial effects of the present disclosure, the following further details are described in conjunction with specific embodiments:

as shown in fig. 1, the concentrating and distilling production system 10 of an embodiment includes a concentrating device 100, the concentrating device 100 includes a mother liquor storage tank 110, distillation reaction kettles 120, and a vacuum pump 130, a mother liquor is stored in the mother liquor storage tank 110, a feed end of each distillation reaction kettles 120 is communicated with a discharge end of the mother liquor storage tank 110, the vacuum pump 130 is communicated with an air outlet end of each distillation reaction kettles 120, the concentrating device 100 further includes a plurality of vacuum valves 140, and the plurality of vacuum valves 140 are disposed on the air outlet ends of the plurality of distillation reaction kettles 120 in a one-to-one correspondence. In this embodiment, when the vacuum pump 130 is turned on, the respective distillation reaction kettles 120 are vacuumized by opening the respective vacuum valves 140, so that each distillation reaction kettles 120 distills, that is, the distillation reaction kettles 120 heat the mother liquor at a predetermined vacuum degree, and the gas separated by distillation is discharged through the vacuum pipe under the suction of the vacuum pump 130, so that the mother liquor in the distillation reaction kettles 120 is concentrated or purified.

As shown in fig. 1, further, the condensed distillation production system 10 is produced by a condensed distillation method including the steps of:

s100: the mother liquor is stored into the mother liquor storage tank 110.

In this example, the mother liquor is aqueous waste water, which is used to prepare industrial salts.

S300: the mother liquor of the mother liquor storage tank 110 is transferred into each distillation reactor 120.

In this embodiment, the mother liquor storage tanks 110 are respectively connected to the feeding ends of the distillation reaction kettles 120 through pipes, and the mother liquor in the mother liquor storage tanks 110 is respectively transferred to the distillation reaction kettles 120, so that the distillation reaction kettles 120 can subsequently distill the mother liquor.

S500: the corresponding mother liquor is heated by each distillation reactor 120.

In this embodiment, the distillation reactor 120 is provided with a heating element, and the distillation reactor 120 heats the mother liquor to make the temperature of the mother liquor reach the boiling point of the substance to be separated under the preset vacuum degree. It is understood that the boiling point of the substance to be separated is smaller than that of the purified substance, and the substance to be separated can be separated by distillation.

S700: the vacuum pump 130 is turned on.

In this embodiment, the vacuum pump 130 is turned on, and at this time, each vacuum valve 140 is in a closed state, so that the vacuum pump 130 is in a state of being capable of evacuating the distillation reactor 120 at any time.

S900: when the mother liquor temperature of each distillation reaction kettle 120 is maintained at a preset temperature, the corresponding vacuum valve 140 is opened to maintain the vacuum degree of each distillation reaction kettle 120 at the preset vacuum degree.

In this embodiment, when the mother liquor temperature of each distillation reaction kettle 120 reaches the preset temperature, the corresponding vacuum valve 140 is opened to enable the vacuum pump 130 to vacuumize the corresponding distillation reaction kettle 120, so that the corresponding distillation reaction kettle 120 maintains the preset vacuum degree. Because the air outlet end of each distillation reaction kettle 120 is communicated with the vacuum pump 130, that is, the plurality of distillation reaction kettles 120 share a vacuum air source, after all the vacuum valves 140 are opened, the vacuum degree of the plurality of distillation reaction kettles 120 can be kept consistent in a shorter time, so that the plurality of distillation reaction kettles 120 can carry out distillation under the same vacuum degree and the same temperature.

In the concentrated distillation production system 10, each distillation reaction kettle 120 heats the mother liquor, and when the temperature of the mother liquor of each distillation reaction kettle 120 reaches a preset temperature, a corresponding vacuum valve 140 is opened to enable a vacuum pump 130 to vacuumize the corresponding distillation reaction kettle 120, so that the corresponding distillation reaction kettle 120 maintains a preset vacuum degree; because the air outlet end of each distillation reaction kettle 120 is communicated with the vacuum pump 130, that is, the plurality of distillation reaction kettles 120 share a vacuum air source, after all the vacuum valves 140 are opened, the vacuum degree of the plurality of distillation reaction kettles 120 can be kept consistent in a shorter time, so that the plurality of distillation reaction kettles 120 distill under the same vacuum degree and the same temperature; because the distillation reaction kettles 120 can be distilled under the condition of keeping the same vacuum degree and the same temperature, the concentration consistency of the purified matters, namely the concentrate, obtained by each distillation reaction kettle 120 is higher, and the quality stability of the purified matters is improved.

In one embodiment, the preset temperature is 60 ℃ to 75 ℃. Further, the preset temperature is 60 ℃, 68 ℃ or 75 ℃.

In one embodiment, the preset vacuum is 0.88 to 0.1MPa. Further, the vacuum degree is preset to be 0.88MPa, 0.90MPa or 0.1MPa.

As shown in fig. 1, in one embodiment, the concentrated distillation production system 10 further includes a solid-liquid separation device 200, where the solid-liquid separation device 200 is connected to the discharge end of each distillation reactor 120, and the solid-liquid separation device 200 is used for performing solid-liquid separation on the purified product obtained by each distillation reactor 120 to obtain industrial salt.

In one embodiment, as shown in fig. 1, the solid-liquid separation device 200 includes a thickener 210, and a feed end of the thickener 210 is communicated with a discharge end of each distillation reactor 120. In this embodiment, the purified product obtained by distillation in each distillation reaction kettle 120 is conveyed into the thickener 210, and the purified product is temporarily stored in the thickener 210, so that the purified product is concentrated, and the convenience of further processing of the purified product is improved. By stirring and heating the purification product by the thickener 210, fluidity of the purification product is improved for subsequent processing of the purification product.

As shown in fig. 1 and 2, in one embodiment, the solid-liquid separation device 200 further includes a centrifuge 220, wherein a feed end of the centrifuge 220 is in communication with a discharge end of the thickener 210, and the centrifuge 220 has a solid product discharge port and a mother liquor discharge port. In this embodiment, the purified product in the thickener 210 still contains more liquid, so that the purified product cannot be sold directly, and therefore, the solid-liquid separation is performed on the purified product discharged from the thickener 210 by the centrifuge 220 to separate the industrial salt from the liquid in the purified product, the separated industrial salt is discharged from the outlet of the solid product, the separated industrial salt can be sold directly, and the separated liquid is discharged from the outlet of the mother liquor.

As shown in fig. 1 and 2, in one embodiment, the solid-liquid separation device 200 further includes a ton tank 230, and the ton tank 230 is in communication with the solid product outlet. In this embodiment, the industrial salt discharged from the solid product discharge outlet falls into the ton barrel 230.

As shown in fig. 1 and 2, in one embodiment, the solid-liquid separation device 200 further includes a mother liquor return tank 240, a feed end of the mother liquor return tank 240 is connected to a mother liquor discharge port, and a discharge end of the mother liquor return tank 240 is connected to a feed end of each distillation reactor 120. In this embodiment, the liquid separated by the centrifuge 220 is mother liquor, so that the liquid discharged from the mother liquor discharge port is conveyed to the mother liquor returning tank 240 for storage, and the liquid stored in the mother liquor returning tank 240 is conveyed back to each distillation reaction kettle 120 for distillation, thereby improving the utilization rate of raw materials and reducing the waste of raw materials.

As shown in fig. 1, in one embodiment, the concentrated distillation production system 10 further includes a heat sink 300, the heat sink 300 being disposed on the input pipe of the vacuum pump 130. In this embodiment, the gas in the transport pipe of the vacuum pump 130 is the exhaust gas separated from each distillation reactor 120. Since the temperature of the exhaust gas separated from each distillation reactor 120 is high, a heat sink 300 is provided on the vacuum pump 130, and the temperature of the exhaust gas is absorbed by the heat sink 300 so that the exhaust gas is condensed later.

As shown in fig. 1, in one embodiment, the heat dissipating device 300 includes a cooling tower 310, a cooling tank 320, and a plate radiator 330, the cooling tank 320 is located at the lower side of the cooling tower 310, cooling water cooled by the cooling tower 310 is discharged into the cooling tank 320, a cooling water inlet of the plate radiator 330 is communicated with the cooling tank 320, a cooling water outlet of the plate radiator 330 is communicated with the cooling tower 310, an exhaust gas inlet of the plate radiator 330 is communicated with an air outlet end of each distillation reaction kettle 120, and an exhaust gas outlet of the plate radiator 330 is communicated with the vacuum pump 130.

In one embodiment, as shown in fig. 1, the concentrating and distilling production system 10 further comprises a vacuum buffer tank 400, wherein the vacuum buffer tank 400 has a buffer air inlet, a buffer air outlet and a buffer water outlet, the buffer air inlet is in communication with the output end of the heat sink 300, and the buffer air outlet is in communication with the input end of the vacuum pump 130. In this embodiment, the vacuum buffer tank 400 is used to buffer the pressure fluctuation of the exhaust gas, so that the condensation process of the subsequent exhaust gas is more stable. Since the exhaust gas is cooled by the heat sink 300, condensed water is formed in the vacuum buffer tank 400, and the condensed water is discharged through the buffer drain port. Further, the exhaust gas outlet of the plate radiator 330 is directly communicated with the buffer inlet of the vacuum buffer tank 400, so that the exhaust gas outlet of the plate radiator 330 is communicated with the vacuum pump 130 through the vacuum buffer tank 400.

As shown in FIG. 1, in one embodiment, the concentrated distillation production system 10 further comprises a condensing tank 500, an input of the condensing tank 500 being in communication with an output of the vacuum pump 130. In the present embodiment, the offgas passing through the vacuum buffer tank 400 and the vacuum pump 130 is subjected to a condensation process by the condensation tank 500 such that the offgas is condensed in the condensation tank 500.

As shown in fig. 1, in one embodiment, the condensed distillation production system 10 further includes a condensed water storage tank 600, the condensed water storage tank 600 being in communication with the condensed water tank 500, condensed water obtained by the condensed water tank 500 being discharged into the condensed water storage tank 600. The condensed water storage tank 600 is also communicated with the buffer drain port so that condensed water discharged from the buffer drain port is stored in the condensed water storage tank 600. In this embodiment, the condensed water is stored in the condensed water storage tank 600, improving convenience in use and handling of the condensed water.

In one embodiment, as shown in fig. 1, the condensate storage tank 600 has a purge valve 610, the purge valve 610 being in communication with each distillation still 120. In this embodiment, after the production of the condensed distillation production system 10 is stopped, the cleaning valve 610 is opened to enable the condensed water to clean each distillation reaction kettle 120, so that the condensed distillation production system 10 has self-cleaning capability, and the convenience of cleaning the condensed distillation production system 10 is improved.

As shown in fig. 1, in one embodiment, the concentrating and distilling production system 10 further includes a sewage purifying device 700, where the sewage purifying device 700 is in communication with the condensed water storage tank 600, and the sewage purifying device 700 is used for purifying sewage to reduce the pollution level of the sewage.

As shown in fig. 1, in one embodiment, the sewage purification apparatus 700 includes a sewage temporary storage tank 710, a sewage neutralization tank 720, a reverse osmosis tank 730, an adsorption module 740, and a sewage storage tank 750, which are sequentially communicated, wherein the sewage temporary storage tank 710 is communicated with a condensate storage tank 600. In this embodiment, the condensed water stored in the condensed water storage tank 600 is transported to the sewage temporary storage tank 710 for temporary storage, the sewage in the sewage temporary storage tank 710 is transported to the sewage neutralization tank 720, and the sewage neutralization tank 720 performs neutralization treatment on the sewage to adjust the pH value of the sewage to be neutral, so that the corrosiveness of the sewage is reduced. The sewage treated in the sewage neutralization tank 720 is transferred to the reverse osmosis tank 730 for reverse osmosis treatment to remove part of the organic particles in the sewage, the sewage from which part of the organic particles are removed is transferred to the adsorption module 740, part of the pollutants in the sewage is adsorbed by the adsorption module 740 to further purify the sewage, and the sewage adsorbed by the adsorption module 740 is transferred to the sewage storage tank 750. After the sewage storage tank 750 is filled, it is pumped out by an external tank truck and transported to the outside for further treatment.

Further, as shown in fig. 1, the adsorption module 740 is an activated carbon adsorption treatment module, and part of pollutants in the sewage is adsorbed by activated carbon in the adsorption module 740. In other embodiments, the adsorption module 740 may also be a graphene adsorption module or other existing adsorption modules.

In one embodiment, after the step of "when the mother liquor temperature of each distillation reaction kettle 120 is maintained at a preset temperature, opening the corresponding vacuum valve 140 to maintain the vacuum degree of each distillation reaction kettle 120 at a preset vacuum degree so that each distillation reaction kettle performs distillation", the concentration distillation method further comprises: the exhaust gas discharged from each distillation reactor 120 is condensed. In this embodiment, the waste gas discharged from each distillation reaction kettle 120 has high heat, and the waste gas is condensed to form condensed water by condensation treatment.

Further, the step of condensing the exhaust gas discharged from each distillation reactor 120 includes: the waste gas discharged from each distillation reaction kettle 120 is subjected to cooling treatment through a heat radiating device 400; the waste gas is buffered by the vacuum buffer tank 400; the exhaust gas is condensed by the condensing tank 500; the condensed water formed in the condensed water tank 500 and the vacuum buffer tank 400 is transferred into the condensed water storage tank 600.

In this embodiment, the exhaust gas is cooled by the heat dissipating device 400, so that the temperature of the exhaust gas is greatly reduced, the exhaust gas is condensed subsequently, the pressure fluctuation of the exhaust gas is buffered by the vacuum buffer tank 400, the subsequent exhaust gas is condensed more stably, and the exhaust gas passing through the vacuum buffer tank 400 and the vacuum pump 130 is condensed by the condensation tank 500, so that the exhaust gas is condensed in the condensation tank 500, and condensed water in the condensation tank 500 is conveyed to the condensed water storage tank 600 for storage.

In one embodiment, after the step of condensing the exhaust gas discharged from each distillation reactor 120, the concentration distillation method further includes: the condensed water in the condensed water tank 600 is purified by the sewage purification apparatus 700. In this embodiment, the condensed water in the condensed water storage tank 600 is sewage, and thus the sewage purification device 700 is required to purify the condensed water.

Further, the step of purifying the condensed water in the condensed water tank 600 by the sewage purifying device 700 includes: delivering the condensed water in the condensed water storage tank 600 into the sewage temporary storage tank 710 for temporary storage; delivering the sewage in the sewage temporary storage tank 710 to the sewage neutralization tank 720 for neutralization treatment; delivering the sewage in the sewage neutralization tank 720 to the reverse osmosis tank 730 for reverse osmosis treatment; delivering the sewage in the reverse osmosis tank 730 to an adsorption module 740 for adsorption treatment; the sewage outputted from the adsorption module 740 is transferred to the sewage storage tank 750 for storage. In this embodiment, the condensed water stored in the condensed water storage tank 600 is transported to the sewage temporary storage tank 710 for temporary storage, the sewage in the sewage temporary storage tank 710 is transported to the sewage neutralization tank 720, and the sewage neutralization tank 720 performs neutralization treatment on the sewage to adjust the pH value of the sewage to be neutral, so that the corrosiveness of the sewage is reduced. The sewage treated in the sewage neutralization tank 720 is transferred to the reverse osmosis tank 730 for reverse osmosis treatment to remove part of the organic particles in the sewage, the sewage from which part of the organic particles are removed is transferred to the adsorption module 740, part of the pollutants in the sewage is adsorbed by the adsorption module 740 to further purify the sewage, and the sewage adsorbed by the adsorption module 740 is transferred to the sewage storage tank 750. After the sewage storage tank 750 is filled, it is pumped out by an external tank truck and transported to the outside for further treatment.

In one embodiment, after the step of "when the mother liquor temperature of each distillation reaction kettle 120 is maintained at a preset temperature, opening the corresponding vacuum valve 140 to maintain the vacuum degree of each distillation reaction kettle 120 at a preset vacuum degree so that each distillation reaction kettle 120 performs distillation", the concentration distillation method further includes: the purified product obtained by distillation in each distillation reactor 120 is sent to a thickener 210. In this embodiment, the purified product obtained by distillation in each distillation reaction kettle 120 is conveyed into the thickener 210, and the purified product is temporarily stored in the thickener 210, so that the purified product is concentrated, and the convenience of further processing of the purified product is improved. In addition, the flowability of the purified product is improved by stirring and heating the purified product by the thickener 210.

In one embodiment, in the step of "feeding the purified product obtained by distillation in each distillation reactor 120 to the thickener 210", the concentration distillation method further comprises: the purified product in the thickener 210 is fed into the centrifuge 220 so that the centrifuge 220 performs solid-liquid separation of the purified product. In this embodiment, the purified product in the thickener 210 still contains more liquid, so that the purified product cannot be sold, and therefore, the solid-liquid separation is performed on the purified product discharged from the thickener 210 by the centrifuge 220, so as to separate the industrial salt from the liquid in the purified product, the separated industrial salt is discharged from the outlet of the solid product, and the separated liquid is discharged from the outlet of the mother liquor.

In one embodiment, in the step of turning on the vacuum pump 130, the heat dissipating device 300 is also turned on, so that the heat dissipating device 300 is in a state of dissipating heat at any time, and further, the efficiency of cooling the exhaust gas is improved.

Compared with the prior art, the method has at least the following advantages:

each distillation reaction kettle 120 heats the mother liquor, and when the temperature of the mother liquor of each distillation reaction kettle 120 reaches a preset temperature, a corresponding vacuum valve 140 is opened to enable a vacuum pump 130 to vacuumize the corresponding distillation reaction kettle 120, so that the corresponding distillation reaction kettle 120 keeps a preset vacuum degree; because the air outlet end of each distillation reaction kettle 120 is communicated with the vacuum pump 130, that is, the plurality of distillation reaction kettles 120 share a vacuum air source, after all the vacuum valves 140 are opened, the vacuum degree of the plurality of distillation reaction kettles 120 can be kept consistent in a shorter time, so that the plurality of distillation reaction kettles 120 distill under the same vacuum degree and the same temperature; because the distillation reaction kettles 120 can be distilled under the condition of keeping the same vacuum degree and the same temperature, the concentration consistency of the purified matters, namely the concentrate, obtained by each distillation reaction kettle 120 is higher, and the quality stability of the purified matters is improved.

The foregoing examples represent only a few embodiments of the present disclosure, which are described in more detail and detail, but are not to be construed as limiting the scope of the disclosure. It should be noted that variations and modifications can be made by those skilled in the art without departing from the spirit of the disclosure, which are within the scope of the disclosure. Accordingly, the scope of protection of the present disclosure should be determined by the following claims.

Claims (10)

1. The concentrating and distilling production system comprises a concentrating device, wherein the concentrating device comprises a mother solution storage tank, distilling reaction kettles and vacuum pumps, the feed end of each distilling reaction kettle is communicated with the discharge end of the mother solution storage tank, the vacuum pumps are communicated with the air outlet end of each distilling reaction kettle,

the concentration device further comprises a plurality of vacuum valves, and the vacuum valves are arranged on the air outlet ends of the distillation reaction kettles in a one-to-one correspondence manner; the concentrated distillation production system is produced by a concentrated distillation method comprising the steps of:

storing mother liquor into the mother liquor storage tank;

the mother liquor of the mother liquor storage tank is conveyed into each distillation reaction kettle;

heating the corresponding mother liquor through each distillation reaction kettle;

starting the vacuum pump;

when the mother liquor temperature of each distillation reaction kettle is kept at a preset temperature, opening the corresponding vacuum valve to keep the vacuum degree of each distillation reaction kettle at the preset vacuum degree, so that each distillation reaction kettle is subjected to distillation.

2. The concentrating and distillative production system of claim 1 further comprising a solid-liquid separation device in communication with the discharge end of each distillation reactor.

3. The concentrating and distilling production system according to claim 2, wherein the solid-liquid separation device comprises a thickener, and a feed end of the thickener is communicated with a discharge end of each distillation reaction kettle.

4. The concentrating and distillation production system according to claim 3 wherein the solid-liquid separation device further comprises a centrifuge, the feed end of the centrifuge being in communication with the discharge end of the thickener, the centrifuge having a solid product discharge outlet and a mother liquor discharge outlet.

5. The concentrating and distillation production system of claim 4 wherein the solid-liquid separation device further comprises a ton tank in communication with the solid product discharge outlet.

6. The concentrated distillation production system according to claim 4, wherein the solid-liquid separation device further comprises a mother liquor return tank, a feed end of the mother liquor return tank is communicated with the mother liquor discharge port, and a discharge end of the mother liquor return tank is communicated with a feed end of each distillation reactor.

7. The concentrating and distillation production system of claim 1 further comprising a heat sink disposed on an input pipe of the vacuum pump.

8. The concentrating and distillative production system of claim 7, further comprising a vacuum buffer tank having a buffer air inlet in communication with the output of the heat sink, a buffer air outlet in communication with the input of the vacuum pump, and a buffer drain.

9. The concentrating and distillative production system of claim 8, further comprising a condensing tank, an input of said condensing tank being in communication with an output of said vacuum pump.

10. The concentrating and distillative production system of claim 9, further comprising a condensate storage tank, said condensate storage tank in communication with said condensate tank;

the condensed water storage tank is also communicated with the buffer drain outlet.