CN218636670U - Benzene ring chlorination catalyst separation and recovery unit - Google Patents
Benzene ring chlorination catalyst separation and recovery unit Download PDFInfo
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- CN218636670U CN218636670U CN202222644593.8U CN202222644593U CN218636670U CN 218636670 U CN218636670 U CN 218636670U CN 202222644593 U CN202222644593 U CN 202222644593U CN 218636670 U CN218636670 U CN 218636670U
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Abstract
The utility model relates to a benzene ring chlorination catalyst separation and recovery unit belongs to chemical industry equipment technical field. Comprises a chlorination liquid raw material tank, a process water tank, a centrifugal extraction device, an extraction water phase tank, an extraction oil phase tank, an evaporation device, a centrifugal machine and a catalyst recovery tank; the method comprises the steps that a chlorinated solution raw material tank and a process water tank respectively reversely enter a centrifugal extraction device, an oil phase and a water phase are reversely mixed and extracted in centrifugal extraction equipment, two phases of substances with different densities in the centrifugal extraction equipment are separated through high-speed rotation centrifugation, a catalyst in the oil phase is extracted and enters the water phase, the oil phase organic material automatically flows into an extraction oil phase tank after centrifugal separation, the water phase material automatically flows into an extraction water phase tank, the material in the extraction water phase tank is efficiently concentrated through an MVR evaporation device, evaporated condensate water returns to the process water tank for recycling, a concentrated solution enters a centrifugal machine for solid-liquid separation to obtain a recovered catalyst, and mother liquor of the centrifugal machine returns to an evaporator inlet for continuous evaporation and concentration.
Description
Technical Field
The utility model relates to a benzene ring chlorination catalyst separation and recovery unit belongs to chemical industry equipment technical field.
Background
At present, a reaction solution after catalytic chlorination of toluene or chlorotoluene is rectified and separated after a catalyst is removed, and the traditional catalyst separation method mainly comprises the methods of filtration, evaporative concentration, liquid-liquid or liquid-solid extraction and the like, but the catalyst cannot be completely removed by filtration generally, and the traditional catalyst separation method is used for a long time, the ceramic membrane or the filter cloth is reduced in throughput, so that the ceramic membrane or the filter cloth is easily blocked, and the filter cloth needs to be forcibly cleaned or replaced, so that the separation cost is greatly increased. Domestic manufacturers generally use an evaporation concentration separation method, generally in the concentration process, high-boiling-point substances in a distillation kettle can be slowly increased, the temperature of a tower kettle is higher, the viscosity of materials is increased, the mass and heat transfer efficiency in the kettle is not high, the materials can be seriously coked, general thermosensitive substances are easily decomposed at higher temperature, and generally chlorine-containing aromatic hydrocarbon substances are thermally decomposed at higher temperature to generate hydrogen chloride, so that the materials of the tower kettle, a tower and a heat exchanger are seriously corroded; not only the yield of the target product is reduced, but also the investment of equipment is increased, a large amount of solid waste is generated, the environmental pollution is caused, the solid waste treatment cost is increased, and the production cost is greatly increased.
In view of the above-mentioned drawbacks, the present designer has made active research and innovation to create a device for separating and recovering benzene ring chlorination catalyst, so that the device has industrial value.
Disclosure of Invention
In order to solve the technical problem, the utility model aims at providing a benzene ring chlorination catalyst separation and recovery unit. The utility model discloses utilize the principle of liquid-liquid extraction or liquid-solid extraction, again according to the difference of organic phase and extractant density, the catalyst in the chlorination reaction liquid of will catalyzing separates through extraction + centrifugal mode, no waste solid, the waste liquid discharges in the separation process to utilize MVR evaporation plant to carry out high-efficient evaporative concentration to the catalyst in the extraction phase, the evaporative concentration liquid gets into centrifuge again and carries out solid-liquid separation and obtain retrieving the catalyst, the yield of target product has not only been improved, environmental protection treatment cost has still been reduced.
The utility model relates to a device for separating and recovering benzene ring chlorination catalyst, which comprises a chlorination liquid raw material tank and a process water tank;
the chlorination liquid raw material tank and the process water tank are communicated and connected with the plurality of centrifugal extraction devices, the plurality of centrifugal extraction devices are communicated and connected with an extraction water phase tank and an extraction oil phase tank, the extraction water phase and the extraction oil phase are stored in the plurality of centrifugal extraction devices, the oil phase of the two-phase substances after centrifugal separation automatically flows into the extraction oil phase tank as a heavy phase, the water phase substances automatically flows into the extraction water phase tank as a light phase, a discharge port on the right side of the extraction water phase tank is communicated and connected with the MVR evaporation device, and the materials in the extraction water phase tank can be concentrated efficiently and energy-saving through the MVR evaporation device. MVR evaporation plant still communicates with centrifuge circulation and is connected, and centrifuge bottom and catalyst accumulator intercommunication are connected. The energy of the secondary steam generated by the steam generator can be effectively utilized, so that the aim of reducing energy consumption by recycling heat energy is fulfilled.
Further, the centrifugal extraction device is formed by connecting two or more centrifugal extraction devices in series.
Further, centrifugal extraction equipment is total two, is No. 1 centrifugal extraction equipment and No. 2 centrifugal extraction equipment respectively, and chlorination liquid feed tank passes through pump export and No. 1 centrifugal extraction equipment left side feed inlet intercommunication, and the technology basin passes through pump export and No. 2 centrifugal extraction equipment right side feed inlet intercommunication.
Further, no. 1 centrifugal extraction equipment right side discharge gate and No. 2 centrifugal extraction equipment left side feed inlet intercommunication, no. 2 centrifugal extraction equipment left side discharge gate and No. 1 centrifugal extraction equipment right side feed inlet intercommunication.
Further, the discharge port on the left side of the No. 1 centrifugal extraction equipment is communicated with the extraction water phase tank, and the discharge port on the right side of the No. 2 centrifugal extraction equipment is communicated with the extraction oil phase tank. Through a plurality of centrifugal extraction devices, the catalyst in the catalytic chlorination reaction liquid in the chlorination liquid raw material tank can be extracted by water or an extracting agent in a process water tank, and the oil phase and the extracting agent have certain density difference, preferably the density difference is more than 0.05g/ml. The oil phase and the extractant with different densities reversely enter a centrifugal extraction device for mixed extraction, and two phases of substances with different densities in the centrifugal extraction device are separated by high-speed rotation centrifugation.
Further, MVR evaporation plant includes the pre-heater, extraction aqueous phase jar right side discharge gate and MVR evaporation plant's pre-heater feed inlet intercommunication.
Furthermore, the preheater is communicated with the heater and the evaporation chamber in sequence, and the top of the evaporation chamber is communicated with the compression fan and the heater in sequence. The water-phase material after centrifugal extraction is subjected to high-efficiency energy-saving evaporation concentration by an evaporation chamber of an evaporation device and then enters a centrifuge from a concentrated solution discharge port at the bottom, the evaporated condensate water can enter a process water tank again for recycling, the concentrated solution in the centrifuge is subjected to solid-liquid separation through centrifugation to obtain a recovered catalyst, the recovered catalyst enters a catalyst recovery tank, and the mother liquor of the centrifuge returns to an inlet of a preheater of the evaporation device to be subjected to evaporation concentration continuously. And the evaporation concentrated solution enters a centrifuge for solid-liquid separation to obtain a recovered catalyst, and the mother liquor of the centrifuge returns to an inlet of the evaporator for continuous evaporation and concentration.
Furthermore, the process water tank is filled with water or an extracting agent, and a density difference of more than 0.05g/mL exists between the extracting agent and the oil-phase substance to be extracted.
By the scheme, the invention at least has the following advantages:
(1) The utility model discloses a method of liquid-liquid extraction or liquid-solid extraction separates the catalyst in the catalytic chlorination reaction liquid through extraction + centrifugation, compares with the method of traditional catalyst direct filtration separation and evaporative concentration, does not have waste solid, waste liquid to discharge in the separation process, has improved the yield of target product, has reduced environmental protection treatment cost;
(2) The utility model discloses a carry out MVR energy-efficient concentration with the aqueous phase after the catalyst extraction in the chlorination liquid, realized heat energy cyclic utilization, the solid-liquid separation is realized to the concentrate rethread centrifugation and is obtained the catalyst of retrieving, has realized the circulation recycle of catalyst, greatly reduced manufacturing cost.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood and to be implemented in accordance with the content of the specification, the following detailed description is given of preferred embodiments of the present invention with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate a certain embodiment of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic structural diagram of a benzene ring chlorination catalyst separation and recovery device of the present invention;
wherein, in the figure;
1-1, a chlorination liquid raw material tank; 1-2, a process water tank;
no. 2-1, no. 1 centrifugal extraction equipment; no. 2-2 centrifugal extraction equipment;
3-1, extracting a water phase tank; 3-2, an extraction oil phase tank;
4. an MVR evaporation device; 4-1, an evaporation chamber; 4-2, a heater; 4-3, a preheater; 4-4, compressing a fan;
5. a centrifuge;
6. a catalyst recovery tank.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1, a separation and recovery device for benzene ring chlorination catalyst according to a preferred embodiment of the present invention includes a chlorination solution raw material tank 1-1 and a process water tank 1-2, and is characterized in that:
the chlorination liquid raw material tank 1-1 and the process water tank 1-2 are communicated and connected with a plurality of centrifugal extraction devices, the centrifugal extraction devices are communicated and connected with an extraction water phase tank 3-1 and an extraction oil phase tank 3-2 and used for storing water phases and oil phases extracted and separated from the centrifugal extraction devices, the oil phases of two-phase materials after centrifugal separation automatically flow into the extraction oil phase tank as heavy phases, the water phase materials automatically flow into the extraction water phase tank as light phases, a discharge port on the right side of the extraction water phase tank 3-1 is communicated and connected with an MVR evaporation device 4, and the materials in the extraction water phase tank can be efficiently concentrated in an energy-saving mode through the MVR evaporation device. MVR evaporation plant 4 still is connected with 5 circulations of centrifuge intercommunication, and 5 bottoms of centrifuge and 6 intercommunications of catalyst recovery tank are connected, can effectively utilize the energy of the secondary steam of self production to realize heat energy cyclic utilization and reduce energy resource consumption's purpose.
The device comprises two centrifugal extraction devices, namely a centrifugal extraction device No. 1 2-1 and a centrifugal extraction device No. 2-2, wherein a chlorination liquid raw material tank 1-1 is communicated with a left side feed inlet of the centrifugal extraction device No. 1 through an pump outlet, a process water tank 1-2 is communicated with a right side feed inlet of the centrifugal extraction device No. 2-2 through a pump outlet, a right side discharge outlet of the centrifugal extraction device No. 1 2-1 is communicated with a left side feed inlet of the centrifugal extraction device No. 2-2, a left side discharge outlet of the centrifugal extraction device No. 2-2 is communicated with a right side feed inlet of the centrifugal extraction device No. 1 2-1, a left side discharge outlet of the centrifugal extraction device No. 1 2-1 is communicated with an extraction water phase tank 3-1, and a right side discharge outlet of the centrifugal extraction device No. 2 is communicated with an extraction oil phase tank 3-2; through a plurality of centrifugal extraction devices, the catalyst in the catalytic chlorination reaction liquid in the chlorination liquid raw material tank can be extracted by water or an extracting agent in the process water tank, and the oil phase and the extracting agent have certain density difference, preferably the density difference is more than 0.05g/ml. The oil phase with different density and the extracting agent reversely enter a centrifugal extraction device for mixed extraction, and two phases of substances with different densities in the centrifugal extraction device are separated by high-speed rotation and centrifugation.
MVR evaporation plant 4 includes preheater 4-3, extraction aqueous phase jar 3-1 right side discharge gate and MVR evaporation plant 4's preheater 4-3 feed inlet intercommunication. The preheater 4-3 is sequentially communicated with the heater 4-2 and the evaporation chamber 4-1, the top of the evaporation chamber 4-1 is sequentially communicated with the compression fan 4-4 and the heater 4-2, the water-phase material after centrifugal extraction passes through the evaporation chamber of the evaporation device 4 for high-efficiency energy-saving evaporation concentration and then enters the centrifuge 5 from a discharge port of the concentrated solution at the bottom, the evaporated condensate water can enter the process water tank 1-2 again for recycling, the concentrated solution in the centrifuge 5 is centrifuged to realize solid-liquid separation to obtain the recycled catalyst, the recycled catalyst enters the catalyst recovery tank 6, and the mother liquor of the centrifuge 5 returns to an inlet of the preheater 4-3 of the evaporation device 4 for continuous evaporation concentration. And (4) allowing the evaporation concentrated solution to enter a centrifugal machine for solid-liquid separation to obtain a recovered catalyst, and returning the mother liquor of the centrifugal machine to an inlet of an evaporator for continuous evaporation and concentration.
The utility model discloses a theory of operation as follows:
the utility model discloses a catalyst separation and recovery unit are in the in-service use in-process, according to the principle of liquid-liquid extraction or liquid-solid extraction, catalyst in the reaction liquid is extracted and is got into in the aqueous phase, because the difference of the double-phase density of organic phase and extractant, catalyst in the chlorination reaction liquid of will catalyzing separates through extraction + centrifugal mode, no waste solid in the disengaging process, the waste liquid discharges, and utilize MVR evaporation plant to carry out high-efficient evaporative concentration to the catalyst in aqueous phase, the evaporative concentration liquid reentrant centrifuge carries out solid-liquid separation and obtains retrieving the catalyst, can iteration cycle after the catalyst simple processing of retrieving apply mechanically, the yield of target product has not only been improved, the environmental protection treatment cost has still been reduced.
The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," "connecting," and "connecting" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be directly connected, and "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed;
secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the present invention, only the structures related to the disclosed embodiments are referred to, and other structures can refer to common designs, and under the condition of no conflict, the same embodiment and different embodiments of the present invention can be combined with each other;
and finally: the above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. The utility model provides a benzene ring chlorination catalyst separation and recovery unit, includes chlorination liquid raw materials groove and technology basin, its characterized in that:
chlorination liquid raw material tank and technology basin and a plurality of centrifugal extraction equipment intercommunication are connected, and the intercommunication is connected with extraction aqueous phase jar and extraction oil phase jar on a plurality of centrifugal extraction equipment, extraction aqueous phase jar right side discharge gate and MVR evaporation plant intercommunication are connected, MVR evaporation plant still with centrifuge circulation intercommunication connection, centrifuge bottom and catalyst recovery tank intercommunication are connected.
2. The device for separating and recovering benzene ring chlorination catalyst according to claim 1, wherein: the centrifugal extraction equipment is formed by connecting two or more centrifugal extraction equipment in series.
3. The separation and recovery device of benzene ring chlorination catalyst according to claim 1, characterized in that: centrifugal extraction equipment is total two, is No. 1 centrifugal extraction equipment and No. 2 centrifugal extraction equipment respectively, and chlorination liquid raw material tank passes through pump export and No. 1 centrifugal extraction equipment left side feed inlet intercommunication, and the technology basin passes through pump export and No. 2 centrifugal extraction equipment right side feed inlet intercommunication.
4. The device for separating and recovering a benzene ring chlorination catalyst according to claim 3, wherein: no. 1 centrifugal extraction equipment right side discharge gate and No. 2 centrifugal extraction equipment left side feed inlet intercommunication, no. 2 centrifugal extraction equipment left side discharge gate and No. 1 centrifugal extraction equipment right side feed inlet intercommunication.
5. The device for separating and recovering a benzene ring chlorination catalyst according to claim 3, wherein: a discharge port on the left side of the No. 1 centrifugal extraction equipment is communicated with an extraction water phase tank, and a discharge port on the right side of the No. 2 centrifugal extraction equipment is communicated with an extraction oil phase tank.
6. The separation and recovery device of benzene ring chlorination catalyst according to claim 1, characterized in that: MVR evaporation plant includes the preheater, extraction aqueous phase jar right side discharge gate and MVR evaporation plant's preheater feed inlet intercommunication.
7. The device for separating and recovering a benzene ring chlorination catalyst according to claim 6, wherein: the preheater is communicated with the heater and the evaporation chamber in sequence, and the top of the evaporation chamber is communicated with the compression fan and the heater in sequence.
8. The device for separating and recovering benzene ring chlorination catalyst according to claim 1, wherein: the process water tank is filled with water or an extracting agent, and a density difference of more than 0.05g/mL exists between the extracting agent and an oil phase substance to be extracted.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222644593.8U CN218636670U (en) | 2022-10-09 | 2022-10-09 | Benzene ring chlorination catalyst separation and recovery unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222644593.8U CN218636670U (en) | 2022-10-09 | 2022-10-09 | Benzene ring chlorination catalyst separation and recovery unit |
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| CN218636670U true CN218636670U (en) | 2023-03-17 |
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| CN202222644593.8U Active CN218636670U (en) | 2022-10-09 | 2022-10-09 | Benzene ring chlorination catalyst separation and recovery unit |
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| CN (1) | CN218636670U (en) |
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- 2022-10-09 CN CN202222644593.8U patent/CN218636670U/en active Active
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