CN216654563U - Pigment yellow 12 production system - Google Patents
Pigment yellow 12 production system Download PDFInfo
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- CN216654563U CN216654563U CN202220076412.3U CN202220076412U CN216654563U CN 216654563 U CN216654563 U CN 216654563U CN 202220076412 U CN202220076412 U CN 202220076412U CN 216654563 U CN216654563 U CN 216654563U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A20/124—Water desalination
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Abstract
The utility model provides a pigment yellow 12 production system, and belongs to the technical field of fine chemical equipment. The system comprises a diazo reaction device, a coupling liquid configuration device, a coupling reaction device, a filter press and a wastewater treatment device, wherein the wastewater treatment device comprises a filtrate pool, a filtrate pump, a concentration tank, a condensate tank and a desalination assembly. And (3) performing coupling reaction on the diazo liquid and the coupling liquid in a coupling reaction device, filtering the obtained pigment yellow 12 slurry by using a filter press, and washing and drying the solid phase to obtain the product pigment yellow 12. And discharging the filtrate of the filter press into a filtrate tank, pumping the filtrate into a concentration tank by a filtrate pump for evaporation and concentration, and storing the condensate extracted from the top of the concentration tank into a condensate tank for reuse as clean water or for preparing a reaction reagent. And (3) cooling the concentrated solution extracted from the bottom of the concentration tank, sending the cooled concentrated solution into a desalting component, and separating to obtain waste salt and wastewater. And part of the wastewater is recycled, and most of solid-phase insoluble substances and salts contained in the wastewater are separated in advance, so that the difficulty in wastewater treatment is reduced.
Description
Technical Field
The utility model belongs to the technical field of fine chemical equipment, and particularly relates to a pigment yellow 12 production system.
Background
Pigment Yellow 12 (Pigment Yellow 12), also known as benzidine Yellow, has excellent brilliance, strong tinctorial strength, good light fastness, and better transparency and hiding power, and is often used for coloring ink, paint, rubber, plastics, Pigment printing paste, and cultural and educational products.
The production process of pigment yellow 12 comprises: diazotizing 3, 3' -dichlorobenzidine, coupling with acetoacetanilide, and filtering, drying and other treatment processes to prepare the product. In the prior art, for example, chinese utility model patent No. 202021091331.8 discloses a pigment yellow 12 synthesis apparatus, which includes a diazo kettle, a dissolution kettle, a coupling kettle and related accessory pipes and equipment. However, in the synthesis process of fuel yellow 12, the generated wastewater is mainly concentrated and discharged through a filter press, and the wastewater is high in nitrogen content, salt content and COD content, and is directly discharged, so that the difficulty of wastewater treatment is increased, and water resource waste is caused.
SUMMERY OF THE UTILITY MODEL
Based on the technical scheme, the utility model provides a pigment yellow 12 production system, which aims to solve the technical problems of high wastewater treatment difficulty and water resource waste in the pigment yellow production process in the prior art.
The technical scheme for solving the technical problems is as follows:
a pigment yellow 12 production system comprises a diazo reaction device, a coupling liquid preparation device, a coupling reaction device, a filter press and a wastewater treatment device;
the diazo reaction device is used for obtaining diazo liquid;
the coupling liquid preparation device is used for preparing coupling liquid;
the feed end of the coupling reaction device is respectively connected with the discharge ends of the diazo reaction device and the coupling liquid preparation device; performing coupling reaction on the diazo liquid and the coupling liquid in the coupling reaction device to obtain pigment yellow 12 slurry;
the feed end of the filter press is connected with the discharge end of the coupling reaction device;
the wastewater treatment device is connected with a filtrate discharge end of the filter press; the wastewater treatment device comprises a filtrate tank, a filtrate pump, a concentration tank, a condensate tank and a desalination assembly, wherein the filtrate tank is connected with a filtrate discharge end of the filter press; the condensate tank is connected with a condensate discharge end of the concentration tank, and the desalination assembly is connected with a concentrate discharge end of the concentration tank; the discharge end of the condensate tank is connected with the diazo reaction device and/or the coupling liquid preparation device, and the desalting component is provided with a waste salt extraction pipe and a waste water extraction pipe.
Preferably, the condensate tank is further connected with a reagent feeding pipe for configuring the reagent for the diazo reaction device and/or the coupling solution configuration device.
Preferably, an inlet of the filtrate pump is provided with a supernatant feeding pipe and a bottom slag feeding pipe, and inlets of the supernatant feeding pipe and the bottom slag feeding pipe are respectively arranged at the middle part and the bottom of the filtrate tank; the outlet of the filtrate pump is also connected with the inlet end of the filter press.
Preferably, the diazo reaction device comprises a diazo reaction kettle, a decolorizing agent filter and a diazo liquid tank which are connected in sequence, and the diazo reaction kettle is provided with a first water-cooling jacket and a steam feeding pipe.
Preferably, a steam distributor is arranged in the diazo reaction kettle, and the steam distributor is arranged in a cross shape.
Preferably, the diazo reaction kettle is also provided with an ice water feeding pipe.
Preferably, the coupling liquid preparation device comprises a preparation tank, and a second water-cooling jacket is arranged on the preparation tank.
Preferably, the coupling reaction device comprises a coupling reaction kettle, and a third water-cooling jacket is arranged on the coupling reaction kettle.
Preferably, the pigment yellow 12 production system further comprises an alkali absorption tower, and a gas-phase feed end of the alkali absorption tower is connected with the diazo reaction device, the coupling liquid preparation device and a gas-phase discharge end of the coupling reaction device.
Compared with the prior art, the utility model has at least the following advantages:
the method comprises the steps of arranging a wastewater treatment device comprising a filtrate tank, a filtrate pump, a concentration tank, a condensate tank and a desalination assembly, carrying out coupling reaction on diazo liquid and coupling liquid in a coupling reaction device, filtering the obtained pigment yellow 12 slurry by the filter press, and washing and drying a solid phase to obtain the product pigment yellow 12. And discharging the filtrate of the filter press into the filtrate tank, then pumping the filtrate into the concentration tank through the filtrate pump for evaporation and concentration, and storing the condensate extracted from the top of the concentration tank into the condensate tank for reuse as clean water or for preparing a reaction reagent. And cooling the concentrated solution extracted from the bottom of the concentration tank, sending the cooled concentrated solution into the desalting component, and separating to obtain waste salt and wastewater.
Through setting up waste water treatment device, on the one hand the produced waste water of recycle part production pigment yellow 12 in-process reduces the waste water discharge, realizes waste water resource utilization. On the other hand, most solid-phase insoluble substances and salts contained in the wastewater are separated in advance, so that the nitrogen content and the salt content of the wastewater are reduced, the wastewater treatment difficulty is reduced, and the wastewater is conveniently subjected to centralized treatment.
Drawings
FIG. 1 is a schematic flow chart of an apparatus of a system for producing pigment yellow 12 according to an embodiment.
In the figure: pigment yellow 12 production system 10, diazo reaction kettle 110, first water-cooling jacket 111, vapor feed pipe 112, vapor distributor 113, ice water feed pipe 114, decolorizing agent filter 120, diazo liquid tank 130, preparation tank 210, second water-cooling jacket 211, coupling reaction kettle 310, third water-cooling jacket 311, filter press 400, filtrate tank 510, filtrate pump 520, supernatant feed pipe 521, bottom sediment feed pipe 522, concentration tank 530, condensate tank 540, reagent feed pipe 541, desalination component 550, waste salt production pipe 551, waste water production pipe 552 and alkali absorption tower 600.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The technical solutions of the present invention will be further described below with reference to the drawings of the embodiments of the present invention, and the present invention is not limited to the following specific embodiments.
It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar parts. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "front", "rear", "left", "right", "top", "bottom", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the patent, and the specific meanings of the terms will be understood by those skilled in the art according to specific situations.
In one embodiment, referring to fig. 1, a pigment yellow 12 production system 10 includes a diazo reaction device, a coupling solution preparation device, a coupling reaction device, a filter press 400, and a wastewater treatment device. The diazo reaction device is used for obtaining diazo liquid, the coupling liquid preparation device is used for preparing coupling liquid, the feeding end of the coupling reaction device is respectively connected with the discharging ends of the diazo reaction device and the coupling liquid preparation device, and the diazo liquid and the coupling liquid are subjected to coupling reaction in the coupling reaction device to obtain pigment yellow 12 slurry. The feed end of the filter press 400 is connected with the discharge end of the coupling reaction device, and the wastewater treatment device is connected with the filtrate discharge end of the filter press 400.
The wastewater treatment device comprises a filtrate tank 510, a filtrate pump 520, a concentration tank 530, a condensate tank 540 and a desalination assembly 550, wherein the filtrate tank 510 is connected with the filtrate discharge end of the filter press 400, the inlet of the filtrate pump 520 is connected with the filtrate tank 510, and the outlet of the filtrate pump is connected with the concentration tank 530. The condensate tank 540 is connected to the condensate outlet of the concentration tank 530, and the desalination assembly 550 is connected to the concentrate outlet of the concentration tank 530. The discharge end of the condensate tank 540 is connected with the diazo reaction device and/or the coupling liquid preparation device, and the desalination component 550 is provided with a waste salt extraction pipe 551 and a waste water extraction pipe 552.
And performing coupling reaction on the diazo liquid and the coupling liquid in the coupling reaction device to obtain pigment yellow 12 slurry, filtering the pigment yellow 12 slurry by using the filter press 400, and washing and drying the solid phase to obtain the product pigment yellow 12. The filtrate of the filter press 400 is discharged into the filtrate tank 510, and then is sent into the concentration tank 530 through the filtrate pump 520 for evaporation and concentration, and the condensate liquid extracted from the top of the concentration tank 530 is stored in the condensate tank 540, and is recycled as clean water or used for preparing reaction reagents. The concentrated solution extracted from the bottom of the concentration tank 530 is cooled and sent to the desalination assembly 550, and waste salt and wastewater are obtained through separation.
In the above embodiment, by providing the wastewater treatment device, on one hand, part of wastewater generated in the process of producing pigment yellow 12 is recycled, the wastewater discharge amount is reduced, and the wastewater resource utilization is realized. On the other hand, most solid-phase insoluble substances and salts contained in the wastewater are separated in advance, so that the nitrogen content and the salt content of the wastewater are reduced, the wastewater treatment difficulty is reduced, and the wastewater is conveniently subjected to centralized treatment.
Specifically, the diazo reaction device is used for carrying out diazo reaction to obtain diazo liquid. For example, the diazo reaction device comprises a diazo reaction kettle 110, a decolorizing agent filter 120 and a diazo liquid tank 130 which are connected in sequence, wherein the diazo reaction kettle 110 is provided with a first water-cooling jacket 111 and a vapor feeding pipe 112. When diazotization reaction is carried out, firstly, hydrochloric acid is added into the diazotization reaction kettle 110, then 3, 3' -dichlorobenzidine is added under the stirring state, steam is introduced into the diazotization reaction kettle 110 through the steam feed pipe 112 to raise the temperature to the process temperature, and the temperature is kept for a preset time. After the heat preservation is finished, the steam feed pipe 112 is closed, frozen brine is introduced into the first water-cooling jacket 111, the liquid phase temperature is reduced to the process temperature, and then sodium nitrite solution is added for diazotization. After the reaction is finished, activated clay is added into the diazo reaction kettle 110 for decolorization, and the obtained diazo liquid after decolorization is stored in the diazo liquid tank 130 for later use.
The coupling liquid configuration device is used for configuring a coupling liquid, for example, the coupling liquid configuration device includes a preparation tank 210, and a second water-cooling jacket 211 is disposed on the preparation tank 210. When the coupling solution is prepared, firstly, adding liquid alkali and water into the preparation tank 210, adding acetoacetanilide under stirring to dissolve the acetoacetanilide, then adding a buffer solution, introducing frozen saline into the second water-cooling jacket 211, and cooling to a process temperature to obtain the coupling solution for later use.
The coupling reaction device is used for coupling reaction, for example, the coupling reaction device comprises a coupling reaction kettle 310, and a third water-cooling jacket 311 is arranged on the coupling reaction kettle 310. During the coupling reaction, firstly, the coupling solution is introduced into the coupling reaction kettle 310, and the frozen brine is introduced into the third water-cooling jacket 311, so that the temperature in the coupling reaction kettle 310 reaches the process temperature. And then dripping heavy nitrogen liquid into the coupling reaction kettle 310, and after finishing dripping, preserving the heat for a preset time, finishing the coupling reaction to obtain pigment yellow 12 slurry.
And conveying the pigment yellow 12 slurry to the filter press 400, filtering, washing a filter cake with water, and drying to obtain a pigment yellow 12 product. After the pigment yellow 12 slurry is filtered by the filter press 400, the obtained filtrate is discharged to the filtrate tank for reduction and recycling.
It should be noted that, during the diazo reaction, the coupling solution preparation and the coupling reaction, when the temperature rise is involved, the temperature rise is performed by introducing low-pressure steam into the diazo reaction kettle 110, the preparation tank 210 and the coupling reaction kettle 310, so as to improve the temperature rise efficiency. When the temperature is reduced, the temperature is reduced by introducing chilled brine into the first water-cooling jacket 111, the second water-cooling jacket 211 and the third water-cooling jacket 311, so that the temperature reduction efficiency is improved, and the temperature reduction by adding ice water into the diazo reaction kettle 110, the preparation tank 210 and the coupling reaction kettle 310 is avoided, thereby reducing the discharge amount of wastewater.
Preferably, a reagent feeding pipe 541 is further connected to the condensate tank 540 for disposing a reagent for the diazo reaction apparatus and/or the coupling solution disposing apparatus. For example, the reagent feeding pipe 541 is used to add high concentration sodium nitrite, hydrochloric acid or liquid caustic to the condensate tank 540 to prepare the corresponding reagent of process concentration.
In one preferred embodiment, the inlet of the filtrate pump 520 is provided with a supernatant feeding pipe 521 and a bottom slag feeding pipe 522, and the inlets of the supernatant feeding pipe 521 and the bottom slag feeding pipe 522 are respectively arranged at the middle part and the bottom part of the filtrate tank 510. The outlet of the filtrate pump 520 is also connected to the inlet end of the filter press 400. After being filtered by the filter press 400, the pigment yellow 12 slurry enters the filtrate tank 510 and is settled and separated in the filtrate tank 510. The supernatant is sent to the concentration tank 530, evaporated and concentrated, and separated to obtain clear water, waste salt and wastewater, and the bottom turbid liquid can be returned to the inlet of the filter press 400 together with the pigment yellow 12 slurry, filtered, and part of the pigment yellow 12 product in the turbid liquid settled at the bottom of the filtrate tank 510 is recovered, thereby improving the product yield.
In some embodiments, in order to improve the uniformity of heat exchange and avoid local overheating, a vapor distributor 113 is disposed in the diazo reaction kettle 110, and the vapor distributor 113 is disposed in a cross shape.
In some embodiments, the diazo reaction kettle 110 is further provided with a frozen water feeding pipe 114. In the diazotization reaction process, the reaction temperature needs to be controlled to be about 0 ℃, the temperature is reduced by only using frozen saline water, when the temperature is reduced to be below 10 ℃, the temperature reduction rate is slow, the temperature reduction efficiency is low, and at the moment, ice blocks or ice water can be added into the diazotization reaction kettle 110 to accelerate the temperature reduction and improve the temperature reduction effect.
In some embodiments, the pigment yellow 12 production system 10 further comprises an alkali absorption tower 600, and a gas-phase feed end of the alkali absorption tower 600 is connected to the diazo reaction device, the coupling liquid configuration device, and a gas-phase discharge end of the coupling reaction device. During the diazotization reaction and the coupling reaction, the dissipated gas phase contains a small amount of HCl and NOxAnd gas is purified and discharged through the alkali absorption tower 600, so that the pollution of tail gas to the workshop environment is reduced, and the workshop environment is improved.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A pigment yellow 12 production system is characterized by comprising a diazo reaction device, a coupling liquid preparation device, a coupling reaction device, a filter press and a wastewater treatment device;
the diazo reaction device is used for obtaining diazo liquid;
the coupling liquid preparation device is used for preparing coupling liquid;
the feed end of the coupling reaction device is respectively connected with the discharge ends of the diazo reaction device and the coupling liquid preparation device; performing coupling reaction on the diazo liquid and the coupling liquid in the coupling reaction device to obtain pigment yellow 12 slurry;
the feed end of the filter press is connected with the discharge end of the coupling reaction device;
the wastewater treatment device is connected with a filtrate discharge end of the filter press; the wastewater treatment device comprises a filtrate tank, a filtrate pump, a concentration tank, a condensate tank and a desalination assembly, wherein the filtrate tank is connected with a filtrate discharge end of the filter press; the condensate tank is connected with a condensate discharge end of the concentration tank, and the desalination assembly is connected with a concentrate discharge end of the concentration tank; the discharge end of the condensate tank is connected with the diazo reaction device and/or the coupling liquid preparation device, and the desalting component is provided with a waste salt extraction pipe and a waste water extraction pipe.
2. The pigment yellow 12 production system of claim 1, wherein a reagent feeding pipe is further connected to the condensate tank for preparing the reagent for the diazo reaction device and/or the coupling solution preparing device.
3. The pigment yellow 12 production system of claim 1, wherein an inlet of the filtrate pump is provided with a supernatant feeding pipe and a bottom slag feeding pipe, and inlets of the supernatant feeding pipe and the bottom slag feeding pipe are respectively arranged at the middle part and the bottom part of the filtrate tank; the outlet of the filtrate pump is also connected with the inlet end of the filter press.
4. The pigment yellow 12 production system of claim 1, wherein the diazo reaction device comprises a diazo reaction kettle, a decolorizer filter and a diazo liquid tank which are connected in sequence, and the diazo reaction kettle is provided with a first water-cooling jacket and a vapor feeding pipe.
5. The pigment yellow 12 production system of claim 4, wherein a vapor distributor is arranged in the diazo reaction kettle, and the vapor distributor is arranged in a cross shape.
6. The pigment yellow 12 production system of claim 4, wherein the diazo reaction kettle is further provided with an iced water feeding pipe.
7. The pigment yellow 12 production system of claim 1, wherein the coupling liquid preparation device comprises a preparation tank, and a second water-cooling jacket is arranged on the preparation tank.
8. The pigment yellow 12 production system of claim 1, wherein the coupling reaction device comprises a coupling reaction kettle, and a third water-cooling jacket is arranged on the coupling reaction kettle.
9. The pigment yellow 12 production system of claim 1, further comprising an alkali absorption tower, wherein a gas phase feed end of the alkali absorption tower is connected with the diazo reaction device, the coupling liquid preparation device and a gas phase discharge end of the coupling reaction device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220076412.3U CN216654563U (en) | 2022-01-12 | 2022-01-12 | Pigment yellow 12 production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220076412.3U CN216654563U (en) | 2022-01-12 | 2022-01-12 | Pigment yellow 12 production system |
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| CN216654563U true CN216654563U (en) | 2022-06-03 |
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| CN202220076412.3U Active CN216654563U (en) | 2022-01-12 | 2022-01-12 | Pigment yellow 12 production system |
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