CN216584611U - Alcohol-soluble black production wastewater aniline recovery processing system - Google Patents
Alcohol-soluble black production wastewater aniline recovery processing system Download PDFInfo
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- CN216584611U CN216584611U CN202123393525.0U CN202123393525U CN216584611U CN 216584611 U CN216584611 U CN 216584611U CN 202123393525 U CN202123393525 U CN 202123393525U CN 216584611 U CN216584611 U CN 216584611U
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Abstract
Alcohol-soluble black production wastewater aniline recovery processing system includes: the device comprises an aniline wastewater neutralization tank, a steam generator, an azeotropic kettle, a distillation tower, a preheater, a condenser and a liquid separation tank, wherein the aniline wastewater neutralization tank is connected with the preheater through a variable-frequency material transfer pump through a pipeline; the utility model exchanges heat of the distilled wastewater by the heat conduction oil to generate steam, and then aniline is separated by the distillation tower, the condenser and the liquid separation tank; the direct injection distillation mode of the fresh steam is replaced, and the introduction of the external fresh steam (water) can be effectively reduced, so that the total amount of the distilled wastewater is reduced, and the effects of energy conservation and emission reduction are achieved.
Description
Technical Field
The utility model belongs to the technical field of aniline waste water treatment technique and specifically relates to an alcohol-soluble black production wastewater aniline recovery processing system is related to.
Background
In the production process of the alcohol-soluble black dye, a large amount of aniline wastewater is generated, a large amount of acidic high-salt wastewater is generated in the acid washing process, and alkaline high-salt wastewater is generated in the aniline distillation process, the high-salt wastewater must be strictly treated to reach the discharge standard, the production cost is invisibly increased, each ton of wastewater consumes about two to three hundred yuan, the main treatment measures are evaporation and concentration, a large amount of steam or electric energy is consumed, and the enterprise cost is increased.
At present, aiming at the aniline wastewater recovery disposal mode, domestic industrial enterprises adopt an azeotropic distillation mode for disposal, namely, fresh steam is sprayed at the bottom of a distillation tower, aniline wastewater is pumped into the tower top, and aniline and steam (1:8) are stripped after being mixed in a packing layer. The disadvantage of the fresh steam injection azeotropic distillation is that the energy consumption and the operation cost are both high; the most important point is that the external steam condensate water is brought into the sewage, and the evaporation concentration treatment cost of the high-salinity sewage is increased. According to engineering examples and literature data, the aniline wastewater recovery device consumes 0.3-0.35 ton of fresh steam per ton of sewage, simultaneously brings 0.3-0.35 ton of steam condensate water, and as aniline has certain solubility (20 ℃, 36g/L) in water, more aniline is dissolved in water after the water amount is increased, secondary pollution is brought to the environment, and the cost of tail gas treatment is increased. Therefore, by using the novel technical equipment, the distillation efficiency is improved, the sewage treatment cost is reduced, the energy conservation and emission reduction are realized, and an aniline recovery and treatment system for alcohol-soluble black production wastewater needs to be improved.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an alcohol-soluble black production wastewater aniline recovery processing system that can change azeotropic distillation heat source mode, improve distillation efficiency, optimize aniline and retrieve is provided.
For solving above-mentioned technical problem, an alcohol-soluble black production wastewater aniline recovery processing system, including aniline waste water neutralization tank, steam generator, azeotropic kettle, distillation column, pre-heater, condenser and knockout drum, aniline waste water neutralization tank through the pipeline pass through the frequency conversion material transfer pump with the pre-heater is connected, steam generator arranges in inside the azeotropic kettle, azeotropic kettle's last port with the distillation column bottom links to each other, the top of the tower of distillation column with the preheating pipe of pre-heater links to each other, the side of distillation column pass through the feed liquor pipe with the pre-heater links to each other, the pre-heater lower part pass through the pipeline in proper order with condenser, knockout drum concatenate.
Furthermore, a circulating pump a, a liquid caustic soda tank and a tail gas recovery processing device which are connected with the aniline wastewater neutralization tank are arranged outside the aniline wastewater neutralization tank.
Further, the steam generator is a heat exchanger with a U-shaped coil, and an electric valve is arranged at the inlet of the steam generator.
Furthermore, a turbulent flow pipe is arranged at the bottom in the azeotropic kettle, a gas phase balance pipe is arranged at the upper end, the middle part of the bottom is connected with the turbulent flow pipe through a pipeline matched with a circulating pump b, and one side of the bottom is connected with a waste liquid tank through an n-type liquid discharge pipe.
Further, the waste liquid tank is provided with a remote liquid level meter and a liquid discharge pump.
Further, the condenser includes 1 level condenser and 2 level condenser, 1 level condenser upper portion with the pre-heater pipeline links to each other, 1 level condenser lower part with 2 level condenser upper portion pipeline links to each other, 2 level condenser lower part with divide the liquid jar pipeline to link to each other.
Furthermore, the upper part of the liquid separating tank is connected with the aniline wastewater neutralizing tank, and the lower part of the liquid separating tank is provided with a liquid outlet.
Compared with the prior art, the utility model has the following advantage:
1. the utility model discloses pass through the distillation column air stripping with aniline waste water, azeotropic kettle secondary air stripping produces steam with the conduction oil heat transfer, stops outside steam water and gets into, has reduced sewage discharge, realizes energy saving and emission reduction simultaneously.
2. The utility model discloses well steam generator is the heat exchanger of taking U type coil pipe, with aniline waste water through the heating in the azeotropic kettle, and partial aniline is remained by secondary air stripping, has reduced aniline in the waste water.
3. The utility model prevents ferric hydroxide in the azeotropic kettle from precipitating and blocking a liquid discharge pipe by arranging a turbulent flow pipe at the bottom in the azeotropic kettle and connecting a circulating pump b outside the azeotropic kettle; the upper end of the azeotropic kettle is provided with a gas phase balance pipe connected with a U-shaped glass pipe of a control chamber, so that the condition of steam generation in the azeotropic kettle can be conveniently judged; an n-type liquid discharge pipe is arranged on the side of the azeotropic kettle and is connected with a waste liquid tank, so that 2/3 liquid level is kept in the azeotropic kettle, and the function of automatic liquid discharge can be realized.
4. The utility model discloses a set up long-range level gauge and flowing back pump for the waste liquid jar, realized the automatic flowing back function of waste liquid jar.
5. The utility model discloses a set up condenser and knockout drum, aniline and steam condensation to below 40 ℃, the condensate gets into the knockout drum, and the upper water phase is sent back neutralization pot circulating distillation in order to retrieve aniline wherein, and the aniline of lower floor is as the raw materials circulation advantage in the reaction process mutually, has effectively improved the utilization ratio of aniline waste liquid.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: 1. aniline waste water neutralization tank, 101, circulating pump a, 102, liquid caustic soda jar, 103, tail gas recovery processing device, 104, frequency conversion material transfer pump, 2, azeotropic kettle, 201, vortex pipe, 202, circulating pump b, 203, n type fluid-discharge tube, 204, vapor phase balance pipe, 3, distillation column, 4, steam generator, 401, electric valve, 5, preheater, 6, condenser, 7, divide the fluid reservoir, 8, waste liquid reservoir, 801, the flowing back pump.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in figure 1, alcohol-soluble black production wastewater aniline recovery processing system, including aniline wastewater neutralization tank 1, steam generator 4, azeotropic kettle 2, distillation column 3, pre-heater 5, condenser 6 and knockout drum 7, aniline wastewater neutralization tank 1 through the pipeline pass through frequency conversion material transfer pump 104 with pre-heater 5 connects, and inside azeotropic kettle 2 was placed in to steam generator 4, and azeotropic kettle 2's last port links to each other at the bottom of 3 towers of distillation column, and distillation column 3's top of the tower links to each other with pre-heater 5's preheating pipe, and distillation column 3's side links to each other with pre-heater 5 through the feed liquor pipe, and pre-heater 5 lower part is passed through the pipeline and is concatenated with condenser 6, knockout drum 7 in proper order.
In order to fully mix the aniline wastewater and the liquid caustic soda, a circulating pump a101, a liquid caustic soda tank 102 and a tail gas recovery processing device 103 which are connected with the aniline wastewater neutralization tank 1 are arranged outside the aniline wastewater neutralization tank.
In order to heat the aniline wastewater in the azeotropic kettle 2, part of aniline is subjected to secondary air stripping so as to reduce aniline residue in the wastewater, the steam generator 4 is a heat exchanger with a U-shaped coil, and an electric valve 401 is arranged at an inlet of the steam generator 4.
In order to enable the ferric hydroxide in the azeotropic kettle 2 to be in a suspension state, a turbulent flow pipe 201 is arranged at the bottom in the azeotropic kettle 2, a gas phase balance pipe 204 is arranged at the upper end, the middle part of the bottom end is connected with the turbulent flow pipe 201 through a pipeline matched with a circulating pump b202, in order to achieve an automatic liquid drainage function and enable the liquid level in the azeotropic kettle to be kept 2/3, one side of the bottom end of the azeotropic kettle 2 is connected with a waste liquid tank 8 through an n-shaped liquid drainage pipe 203.
In order to realize the automatic liquid discharge function of the waste liquid tank 8, the waste liquid tank 8 is provided with a remote liquid level meter and a liquid discharge pump 801.
In order to sufficiently cool the mixture of aniline and water vapor, the condenser 6 comprises a 1-stage condenser and a 2-stage condenser, wherein the upper part of the 1-stage condenser is connected with the preheater 5 through a pipeline, the lower part of the 1-stage condenser is connected with the upper part of the 2-stage condenser through a pipeline, and the lower part of the 2-stage condenser is connected with the liquid separation tank 7 through a pipeline.
In order to fully utilize the water and the aniline separated in the liquid separation tank 7, the upper part of the liquid separation tank 7 is connected with the aniline wastewater neutralization tank 1, and the lower part is provided with a liquid outlet.
The working process of the utility model is as follows:
inputting alcohol-soluble black production wastewater into a neutralization tank 1, starting a tail gas recovery treatment device 103 in advance, starting a circulating pump a101 for circulation, starting a liquid alkali tank 102 for valve flow adding of liquid alkali, wherein the circulation time is 2-4 hours, the neutralization is carried out to pH 11-12, and the liquid alkali is a mixture of distillation filter-pressing wastewater and solid flake alkali, and fresh water is not needed.
Step (2), a heat-conducting oil electric valve 401 of the steam generator 4 is started, heat source is provided by heat-conducting oil, and the distilled wastewater is heated into steam in the azeotropic kettle 2; the steam enters from the bottom of the distillation tower 3 and reversely flows upwards through the gas distributor, and the aniline wastewater distillation is started when the temperature of the top of the tower is higher than 95 ℃. The heat conducting oil electric valve 401 is controlled by the temperature of a thermometer at the top of the distillation tower 3, and when the temperature at the top of the distillation tower is higher than 95 ℃, the opening degree of the electric valve 401 is reduced.
Step (3), start 2 circulating pump b202 of azeotropic kettle, waste water gets back to in azeotropic kettle 2 through vortex pipe 201 for iron hydroxide is in the suspended state in the cauldron, and when the liquid level was higher than 2/3 of azeotropic kettle 2, can discharge to waste liquid tank 8 along with waste water from n type fluid-discharge tube 203, is provided with long-range level gauge and positive displacement pump 801 on the waste liquid tank 8, can realize automatic flowing back function.
Step (4), starting the variable-frequency material transfer pump 104, and pressing the aniline wastewater in the aniline wastewater neutralization tank 1 into the preheater 5; the frequency of the variable-frequency material transfer pump 104 is adjusted according to the temperature of the feed liquid entering the distillation tower 3, when the temperature is reduced, the operating frequency of the variable-frequency material transfer pump 104 is automatically reduced, otherwise, the operating frequency is automatically increased; the preheated feed liquid enters the distillation tower 3 from the side part of the tower top, and the aniline wastewater is uniformly distributed on the filler from top to bottom through a liquid distributor.
And (5) contacting the steam and the aniline wastewater in a packing layer of a distillation tower 3 to form an aniline and steam azeotrope, sequentially feeding the aniline and steam azeotrope (1:8) into a preheater 5, a condenser 6 and a separating tank 7 from the tower top, wherein the upper water phase of the separating tank 7 contains a small amount of aniline, overflowing the aniline back to the neutralization tank 1 for circulating distillation to recover the aniline therein, and sending the lower aniline phase to an aniline storage device or a use device through a liquid outlet.
The utility model discloses with aniline waste water through 3 air stripping of distillation column, 2 secondary air stripping of azeotropic kettle produce steam with the conduction oil heat transfer, stop outside steam water and get into, realize sewage minimizing, provide the advantage for follow-up sewage evaporation concentration, realize energy saving and emission reduction. The above description is only a preferred implementation of the present invention, and is not intended to limit the present invention in any way, but it will be obvious to those skilled in the art that modifications and improvements can be made on the basis of the present invention. Therefore, modifications or improvements made on the basis of the present invention are all within the scope of the claimed invention.
Claims (7)
1. The alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: including aniline waste water neutralization tank (1), steam generator (4), azeotropic kettle (2), distillation column (3), preheater (5), condenser (6) and branch liquid jar (7), aniline waste water neutralization tank (1) through the pipeline pass through frequency conversion material transfer pump (104) with preheater (5) are connected, steam generator (4) are arranged in inside azeotropic kettle (2), the last port of azeotropic kettle (2) with distillation column (3) tower bottom links to each other, the top of the tower of distillation column (3) with the preheating pipe of preheater (5) links to each other, the side of distillation column (3) through the feed liquor pipe with preheater (5) link to each other, preheater (5) lower part through the pipeline in proper order with condenser (6), branch liquid jar (7) concatenate.
2. The alcohol-soluble black production wastewater aniline recovery and treatment system according to claim 1, wherein the alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: and a circulating pump a (101), a liquid caustic soda tank (102) and a tail gas recovery and treatment device (103) which are connected with the aniline wastewater neutralization tank (1) are arranged outside the aniline wastewater neutralization tank.
3. The alcohol-soluble black production wastewater aniline recovery and treatment system according to claim 1, wherein the alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: the steam generator (4) is a heat exchanger with a U-shaped coil, and an electric valve (401) is arranged at the inlet of the steam generator (4).
4. The alcohol-soluble black production wastewater aniline recovery and treatment system according to claim 1, wherein the alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: the bottom in the azeotropic kettle (2) is provided with a flow disturbing pipe (201), the upper end is provided with a gas phase balance pipe (204), the middle part of the bottom end is connected with the flow disturbing pipe (201) through a pipeline matched with a circulating pump b (202), and one side of the bottom end is connected with a waste liquid tank (8) through an n-shaped liquid discharge pipe (203).
5. The alcohol-soluble black production wastewater aniline recovery and treatment system according to claim 4, wherein the alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: the waste liquid tank (8) is provided with a remote liquid level meter and a liquid discharge pump (801).
6. The alcohol-soluble black production wastewater aniline recovery and treatment system according to claim 1, wherein the alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: condenser (6) includes 1 level condenser and 2 level condenser, 1 level condenser upper portion with preheater (5) pipeline links to each other, 1 level condenser lower part with 2 level condenser upper portion pipeline links to each other, 2 level condenser lower part with branch fluid reservoir (7) pipeline links to each other.
7. The alcohol-soluble black production wastewater aniline recovery and treatment system according to claim 1, wherein the alcohol-soluble black production wastewater aniline recovery and treatment system is characterized in that: the upper part of the liquid separation tank (7) is connected with the aniline wastewater neutralization tank (1), and the lower part is provided with a liquid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123393525.0U CN216584611U (en) | 2021-12-30 | 2021-12-30 | Alcohol-soluble black production wastewater aniline recovery processing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123393525.0U CN216584611U (en) | 2021-12-30 | 2021-12-30 | Alcohol-soluble black production wastewater aniline recovery processing system |
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| Publication Number | Publication Date |
|---|---|
| CN216584611U true CN216584611U (en) | 2022-05-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123393525.0U Active CN216584611U (en) | 2021-12-30 | 2021-12-30 | Alcohol-soluble black production wastewater aniline recovery processing system |
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| CN (1) | CN216584611U (en) |
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2021
- 2021-12-30 CN CN202123393525.0U patent/CN216584611U/en active Active
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