CN210103496U - Vacuum distillation device for acid-containing wastewater concentration and reuse system - Google Patents
Vacuum distillation device for acid-containing wastewater concentration and reuse system Download PDFInfo
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- CN210103496U CN210103496U CN201920605332.0U CN201920605332U CN210103496U CN 210103496 U CN210103496 U CN 210103496U CN 201920605332 U CN201920605332 U CN 201920605332U CN 210103496 U CN210103496 U CN 210103496U
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Abstract
The utility model relates to a vacuum distillation device for containing among concentrated recycling system of acid waste water, including evaporating pot, condenser and buffer tank, the evaporating pot is connected with the vacuum pump, inside heating pipe, the bottom of being equipped with of this evaporating pot is equipped with the heating jacket, the waste liquid passes through in the waste liquid entry gets into the evaporating pot, heating steam gets into the heating pipe through steam inlet and presss from both sides the cover and heats outside waste liquid, steam becomes into water through steam outlet outflow evaporating pot, the steam after being heated in the waste water gets into in the condenser through steam outlet, the concentrated liquid recovery tank is gone into through the concentrate export by concentrated waste water concentrate after the concentration, steam is discharged into the buffer tank through the distilled water export after being condensed by the cooling water in the condenser, the distilled water is gone into upper process circulation through the positive displacement pump after stable in the buffer tank and is used. The device treats acid-containing wastewater, water can be recycled, mixed acid can approach the recycling standard, zero emission is realized, and the maximization of resource utilization is met.
Description
Technical Field
The utility model relates to a waste water treatment, concretely relates to a vacuum distillation plant for containing among acid waste water concentration recycling system.
Background
When surface treatment enterprise factory production, need use high concentration phosphoric acid and sulphuric acid (hereinafter referred to as mixed acid for short), spare and accessory are after mixing acid tank treatment, and the surface remains mixed acid, need to use industrial water to wash, and the water after washing spare and accessory has 5-10% mixed acid concentration, belongs to dangerous discarded object, and the processing method mainly has two kinds at present:
firstly, the method comprises the following steps: diluting, specially treating and conventionally treating; the processing method has the defects that: 1. the dilution must increase the new water amount; 2. the standard discharge not only has complex treatment process and working procedures and long period, but also needs to purchase a large amount of medicaments and needs a neutralization tank, a sedimentation tank and the like, so the method has large floor area, generates more wastes than the original wastes, cannot effectively utilize resources and causes a large amount of waste;
secondly, the method comprises the following steps: outsourcing treatment, namely outsourcing the high-concentration waste liquid to qualified enterprises specially treating the high-concentration waste liquid, and usually adopting a burning method for treatment; the outsourcing processing method has the defects that: 1. the outsourcing to enterprises for treatment costs a large amount of capital; 2. the resources spent on money are not recycled.
Therefore, a new acid-containing wastewater treatment device is urgently needed to overcome the defects.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model provides a vacuum distillation plant for containing among the concentrated recycling system of sour waste water utilizes the device to handle and contains sour waste water, and not only water can recycle, mixes sour also can be close the retrieval and utilization standard, realizes the zero release, accords with resource utilization's maximize.
The utility model discloses a solve the technical scheme that its technical problem adopted and be:
a vacuum distillation device used in a concentration and recycling system of acid-containing wastewater comprises an evaporation tank, a condenser and a buffer tank, wherein the evaporation tank is connected with a vacuum pump, a heating pipe is arranged in the evaporation tank, a heating jacket is arranged at the bottom of the evaporation tank, a waste liquid inlet, a concentrated solution outlet, a steam inlet, a steam water outlet and a steam water outlet are arranged outside the evaporation tank, a steam water inlet, a distilled water outlet, a cooling water inlet and a cooling water outlet are arranged outside the condenser, the waste liquid treated by the previous process enters the evaporation tank through the waste liquid inlet, heating steam enters the heating pipe and the jacket through the steam inlet to heat the external waste liquid, the steam after heat exchange is changed into water, the water flows out of the evaporation tank through the steam water outlet, the steam after heating in the waste water enters the condenser through the steam water outlet, the concentrated waste water concentrated solution is discharged into a concentrated solution recycling tank through the, and the water vapor is condensed by cooling water in the condenser and then discharged into the buffer tank through the distilled water outlet, and the distilled water is pumped into the upper process for recycling through the liquid discharge pump after being stabilized in the buffer tank.
Preferably, a metering tank is further arranged between the condenser and the buffer tank, and an automatic valve is installed between the metering tank and the buffer tank.
Preferably, the vacuum pump is a water ring vacuum pump, and the vacuum pump is communicated with the metering tank through an exhaust pipe and is communicated with the buffer tank through a water inlet pipe.
Preferably, a filter is arranged on a pipeline between the steam outlet of the evaporation tank and the steam inlet of the condenser and used for filtering impurities in the steam.
Preferably, a meter is arranged at a waste liquid inlet in the evaporation tank and used for recording the water amount.
Preferably, the inner wall of the evaporation tank is coated with a Teflon coating, and the heating pipe and the jacket are made of stainless steel, graphite or Teflon.
Preferably, the waste liquid inlet and the concentrated liquid outlet are automatically controlled through automatic control valves so as to ensure the vacuum degree inside the evaporation tank.
The utility model has the advantages that:
1) the device mainly comprises an evaporation tank, a condenser, a metering tank, a buffer tank and a vacuum pump, wherein acid-containing wastewater treated by a previous procedure enters the evaporation tank, the evaporation tank is kept in a vacuum state through the vacuum pump, water in the wastewater is heated into steam, the steam is condensed into distilled water for recycling, and the concentration of acid in the acid-containing wastewater is further increased to about 70 percent and can be directly recycled;
2) the evaporation tank in the device carries out low-temperature evaporation, the boiling point of water in the evaporation tank is reduced to 40-50 ℃, and low-temperature evaporation is carried out in the cavity, so that the concentration of waste acid in concentrated solution is improved, the corrosivity of mixed acid on the cavity can be reduced, and the service life of equipment is prolonged; one deck teflon is scribbled in the inside of evaporating pot for the contact layer of waste liquid is teflon sintering layer, can be able to bear or endure the corruption of corrosive substance such as high concentration mixed acid, and is equipped with heating jacket in the bottom of evaporating pot and has guaranteed that inside waste liquid has sufficient evaporation boiling heat source, has improved heat exchange efficiency.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a heat exchange tube of the present invention;
in the figure: 10-an evaporation tank, 11-a heating pipe, 12-a jacket, 13-a waste liquid inlet, 14-a concentrated liquid outlet, 15-a steam inlet, 16-a steam water outlet, 17-a meter, 18-a confluence plate, 20-a condenser, 21-a filter, 22-a steam inlet, 23-a distilled water outlet, 24-a cooling water inlet, 25-a cooling water outlet, 30-a metering tank, 31-an automatic valve, 40-a buffer tank, 50-a vacuum pump and 60-a drainage pump.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to 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.
Example (b): as shown in fig. 1 and 2, a vacuum distillation apparatus for an acid-containing wastewater concentration and recycling system comprises an evaporation tank 10, a condenser 20 and a buffer tank 40, wherein the evaporation tank 10 is connected with a vacuum pump 50, a heating pipe 11 is arranged inside the evaporation tank 10, a heating jacket 12 is arranged at the bottom of the evaporation tank 10, a waste liquid inlet 13, a concentrated solution outlet 14, a steam inlet 15, a steam water outlet 16 and a steam outlet are arranged outside the evaporation tank 10, a steam water inlet 22, a distilled water outlet 23, a cooling water inlet 24 and a cooling water outlet 25 are arranged outside the condenser 20, the waste liquid treated by the previous process enters the evaporation tank 10 through the waste liquid inlet 13, heating steam enters the heating pipe 11 and the jacket 12 through the steam inlet 15 to heat the external waste liquid, the steam after heat exchange is changed into water and flows out of the evaporation tank 10 through the steam water outlet, and the steam after heating in the waste water enters the condenser 20 through the steam outlet, the concentrated wastewater is discharged into a concentrated solution recovery tank through a concentrated solution outlet 14, water vapor is condensed by cooling water in a condenser 20 and then discharged into a buffer tank 40 through a distilled water outlet, and the distilled water is stable in the buffer tank 40 and then pumped into the previous process for recycling through a liquid discharge pump 60. The utility model is used for cleaning waste water's recovery system in surface treatment enterprise, mainly contain mixed spent acid such as phosphoric acid and sulphuric acid in the waste water, the concentration (mass percent) of mixed spent acid is 5-10% in the waste water, it gets into vacuum distillation device after preceding process treatment to contain sour waste water, the acid concentration in the waste water after preceding process treatment can reach 15-20%, the sour waste water that contains of this concentration further handles to improve it to about 70% with its acid concentration through vacuum distillation device, can directly retrieve, and the water of distilling out in the waste water is got back to the direct use in the last process after being cooled down, the boiling point of water among this vacuum distillation device reduces to 40-50 ℃, low temperature evaporation in the cavity, can reduce the corrosivity of mixed acid to the cavity, the extension equipment life. Therefore, when the device is used for treating acid-containing wastewater, not only can water be recycled, but also the mixed acid can approach the recycling standard, zero emission is realized, and the maximization of resource utilization is met.
A metering tank 30 is further arranged between the condenser 20 and the buffer tank 40, and an automatic valve 31 is arranged between the metering tank 30 and the buffer tank 40. Distilled water from the condenser 20 passes through the metering tank 30, and when the water level in the metering tank reaches a preset position, the automatic valve 31 is automatically opened, and the distilled water enters the buffer tank 40. The vacuum pump 50 is a water ring vacuum pump, and is communicated with the metering tank 30 through an exhaust pipe and communicated with the buffer tank 40 through an inlet pipe. The buffer tank is used for supplying water to the vacuum pump to ensure the normal operation of the vacuum pump, and the vacuum pump 50 is used for ensuring the vacuum degree in the vacuum distillation apparatus. The pipeline between the vapor outlet of the evaporation tank and the vapor inlet 22 of the condenser is provided with a filter 21 for filtering impurities in the vapor, namely filtering out particulate matters and macromolecular liquid matters contained in the vapor. A meter 17 is arranged at the waste liquid inlet 13 in the evaporation tank and is used for recording the water quantity. The waste liquid inlet 13 and the concentrated liquid outlet 14 are automatically controlled by a self-control valve to ensure the vacuum degree inside the evaporation tank 10.
The inner wall of the evaporation tank 10 is coated with a Teflon coating, and the heating pipe 11 and the jacket 12 are made of stainless steel, graphite or Teflon. A layer of Teflon is coated inside the evaporation tank, so that a contact layer of the waste liquid is a Teflon sintered layer, the corrosion of corrosive substances such as high-concentration mixed acid and the like can be resisted, and the heating jacket is arranged at the bottom of the evaporation tank, so that the internal waste liquid has a sufficient evaporation boiling heat source, and the heat exchange efficiency is improved; the material of heating pipe and clamp cover can be confirmed according to the characteristic of handling the corrosive substance in the waste water, is equipped with cylinder manifold 18 in the heating pipe and is used for carrying out central air feed and exhaust to the heating pipe.
The utility model discloses an operation process: the method comprises the following steps:
the method comprises the following steps: acid-containing wastewater flows into a wastewater collection tank, and low-concentration acid-containing wastewater in the wastewater collection tank is concentrated into medium-concentration acid-containing wastewater through a pipeline sequentially through working procedures of an ultrafiltration device, a reverse osmosis device and the like;
step two: starting a vacuum pump 50 to operate, sucking air or steam in the closed evaporation tank 10 by the vacuum pump to enable the evaporation tank to be in a vacuum state, and allowing the acid-containing wastewater with medium concentration to enter the evaporation tank 10 through a waste liquid inlet 13 under the action of vacuum suction; under the action of the vacuum pump, the boiling point of water in the evaporation tank 10 is reduced to 40-50 ℃, and the water is evaporated at low temperature in the tank body, so that the corrosivity of mixed acid on the tank body can be reduced, and the service life of equipment can be prolonged;
step three: external heating steam enters a heating pipe 11 and a jacket 12 of an evaporation tank through a self-control valve and a steam inlet to heat wastewater in the evaporation tank, steam generated by evaporation of the wastewater is discharged out of the evaporation tank 10 through a steam outlet, steam water obtained by condensation of the steam is discharged out of the evaporation tank 10 through a steam outlet, and a vacuum pump 50 is always in a working state to ensure that the evaporation tank is in a constant low-pressure state;
step four: the water vapor evaporated from the waste water is filtered by the filter 21 and then enters the condenser 20 through the water vapor inlet, the external cooling water enters the condenser through the cooling water inlet 24 to condense the water vapor, and the water vapor is condensed into distilled water and then is discharged out of the condenser 20 through the distilled water outlet 23;
step five: distilled water enters a metering tank 30, after the distilled water in the metering tank is collected to a preset water level, the distilled water is discharged into a buffer tank 40 through an automatic valve 31, the water level in the buffer tank is automatically discharged through a liquid discharge pump 60 after reaching the preset water level through liquid level control, and the discharged distilled water is collected and recycled in the previous working procedure;
step six: after the waste liquid in the evaporation tank 10 is continuously evaporated, the acid concentration in the waste liquid is continuously increased, after the acid concentration is increased to the preset concentration, the control unit controls the vacuum pump to stop running, and the concentrated liquid is discharged out of the evaporation tank through the concentrated liquid outlet 14 and collected in the concentrated liquid recovery tank for reuse. The device is automatically controlled by the control unit, and the control unit controls the automatic opening and closing of the vacuum pump, the automatic valve, the liquid discharge pump and the like, so that the automatic operation of the device is realized.
It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several changes and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (7)
1. A vacuum distillation device for acid-containing wastewater concentration and reuse system is characterized in that: comprises an evaporating pot (10), a condenser (20) and a buffer tank (40), wherein the evaporating pot (10) is connected with a vacuum pump (50), a heating pipe (11) is arranged in the evaporating pot (10), a heating jacket (12) is arranged at the bottom of the evaporating pot, a waste liquid inlet (13), a concentrated solution outlet (14), a steam inlet (15), a steam water outlet (16) and a steam water outlet are arranged outside the evaporating pot (10), a steam water inlet (22), a distilled water outlet (23), a cooling water inlet (24) and a cooling water outlet (25) are arranged outside the condenser (20), waste liquid treated by the previous process enters the evaporating pot (10) through the waste liquid inlet (13), heating steam enters the heating pipe (11) and the jacket (12) through the steam inlet (15) to heat the external waste liquid, and steam after heat exchange is changed into water and flows out of the evaporating pot (10) through the steam water outlet, the heated water vapor in the waste water enters the condenser (20) through the water vapor outlet, the concentrated waste water concentrated solution is discharged into the concentrated solution recovery tank through the concentrated solution outlet (14), the water vapor is condensed by cooling water in the condenser (20) and then is discharged into the buffer tank (40) through the distilled water outlet, and the distilled water is pumped into the upper process for recycling through the liquid discharge pump (60) after being stabilized in the buffer tank (40).
2. The vacuum distillation device for the acid-containing wastewater concentration and reuse system according to claim 1, wherein: still be equipped with metering tank (30) between condenser (20) and buffer tank (40), install automatic valve (31) between metering tank (30) and buffer tank (40).
3. The vacuum distillation device for the acid-containing wastewater concentration and reuse system according to claim 2, wherein: the vacuum pump (50) is a water ring vacuum pump, and is communicated with the metering tank (30) through an exhaust pipe and communicated with the buffer tank (40) through a water inlet pipe.
4. The vacuum distillation device for the acid-containing wastewater concentration and reuse system according to claim 1, wherein: and a filter (21) for filtering impurities in the water vapor is arranged on a pipeline between the water vapor outlet of the evaporation tank and the water vapor inlet (22) of the condenser.
5. The vacuum distillation device for the acid-containing wastewater concentration and reuse system according to claim 1, wherein: and a meter (17) is arranged at a waste liquid inlet (13) in the evaporation tank and is used for recording the water volume.
6. The vacuum distillation device for the acid-containing wastewater concentration and reuse system according to claim 1, wherein: the inner wall of the evaporation tank (10) is coated with a Teflon coating, and the heating pipe (11) and the jacket (12) are made of stainless steel, graphite or Teflon.
7. The vacuum distillation device for the acid-containing wastewater concentration and reuse system according to claim 1, wherein: the waste liquid inlet (13) and the concentrated liquid outlet (14) are automatically controlled through a self-control valve to ensure the vacuum degree in the evaporating pot (10).
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| CN201920605332.0U CN210103496U (en) | 2019-04-29 | 2019-04-29 | Vacuum distillation device for acid-containing wastewater concentration and reuse system |
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| CN201920605332.0U CN210103496U (en) | 2019-04-29 | 2019-04-29 | Vacuum distillation device for acid-containing wastewater concentration and reuse system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230192521A1 (en) * | 2021-12-20 | 2023-06-22 | Chung-Heng LIAO | Metal Surface Treatment Liquid Recycling System and Operation Method Thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230192521A1 (en) * | 2021-12-20 | 2023-06-22 | Chung-Heng LIAO | Metal Surface Treatment Liquid Recycling System and Operation Method Thereof |
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