CN210813998U - Rectification separation system - Google Patents
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- CN210813998U CN210813998U CN201921230670.7U CN201921230670U CN210813998U CN 210813998 U CN210813998 U CN 210813998U CN 201921230670 U CN201921230670 U CN 201921230670U CN 210813998 U CN210813998 U CN 210813998U
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Abstract
The utility model belongs to the technical field of chemical industry equipment. The utility model discloses a rectification separation system, which consists of a dehydration system, a de-weighting system, a phenol rectification system, an o-cresol separation system, an o-cresol rectification system, a cresol separation system, a cresol rectification system and a recovery system; the dehydration system includes a crude phenol storage tank, a dehydration column, and the like, the de-heaving system includes a de-heaving column, and the like, the phenol rectification system includes a phenol column, and the like, the o-cresol separation system includes an o-cresol dehydrogenation column, and the like, the o-cresol rectification system includes an o-cresol column, and the like, the cresol separation system includes a cresol dehydrogenation column, and the like, the cresol rectification system includes a cresol column, and the like, and the recovery system includes a recovery column, and the like. The utility model discloses can realize the separation and purification of various phenols in the crude phenol high-efficiently, separate and retrieve phenol, o-cresol and cresol etc. wherein, it can also reduce poisonous and harmful substance such as tail gas, waste water and discharge to improve the rate of recovery of phenols, reduce energy consumption and cost.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry equipment technique and specifically relates to a rectification piece-rate system is related to.
Background
The separation and rectification treatment of mixed phenol is an important process step in the production process of cresol and the like, but a system specially used for the separation and rectification of mixed phenol is not available in the prior art, and most of the existing treatments adopt equipment of similar processes for treatment, so that the conditions of high energy consumption, poor pertinence and low separation and rectification efficiency exist.
Disclosure of Invention
In order to solve the problem, the utility model provides a rectification separation system with low energy consumption and high separation efficiency.
In order to achieve the above object, the utility model adopts the following technical scheme:
a rectification separation system comprises a dehydration system, a de-weighting system, a phenol rectification system, an o-cresol separation system, an o-cresol rectification system, a cresol separation system, a cresol rectification system and a recovery system;
the crude phenol storage tank, the dehydration tower, the condenser, the reflux tank and the reflux pump in the dehydration system are sequentially connected, the bottom of the dehydration tower is connected with the reboiler and then connected to the middle of the dehydration tower, the bottom of the reflux tank is connected with the wastewater pond, and the bottom of the dehydration tower is connected with the liquid pump and then connected with the heavy component removal tower in the heavy component removal system;
a de-heavy tower, a condenser, a reflux tank and a reflux pump in the de-heavy system are sequentially connected, the bottom of the de-heavy tower is connected with a reboiler and then connected to the middle of the de-heavy tower, the reflux pump is connected with the de-heavy tower and a phenol tower in a phenol rectification system, and the bottom of the de-heavy tower is connected with a liquid pump and then connected with a residue phenol tank;
a phenol tower, a condenser, a reflux tank and a reflux pump in a phenol rectification system are sequentially connected, the bottom of the phenol tower is connected with a reboiler and then connected to the middle of the phenol tower, the reflux pump is connected with the phenol tower and a phenol tank, and the bottom of the phenol tower is connected with a liquid pump and then connected with an o-cresol dehydrogenation tower in an o-cresol separation system;
an o-cresol dehydrogenation tower, a condenser, a reflux tank and a reflux pump in the o-cresol separation system are sequentially connected, the bottom of the o-cresol dehydrogenation tower is connected with a reboiler and then connected to the middle of the o-cresol dehydrogenation tower, the reflux pump is connected with the o-cresol dehydrogenation tower and a phenol tower, and the bottom of the o-cresol dehydrogenation tower is connected with a liquid pump and then connected with the o-cresol tower in an o-cresol rectification system;
an o-cresol tower, a condenser, a reflux tank and a reflux pump in an o-cresol rectification system are sequentially connected, the bottom of the o-cresol tower is connected with a reboiler and then connected to the middle of the o-cresol tower, the reflux pump is connected with the o-cresol tower and an o-cresol tank, and the bottom of the o-cresol tower is connected with a liquid pump and then connected with a cresol dehydrogenation tower in a cresol separation system;
the cresol separation system comprises a cresol dehydrogenation tower, a condenser, a reflux tank and a reflux pump, wherein the cresol dehydrogenation tower, the condenser, the reflux tank and the reflux pump are sequentially connected in the cresol separation system;
a cresol tower, a condenser, a reflux tank and a reflux pump in the cresol rectification system are sequentially connected, the bottom of the cresol tower is connected with a reboiler and then connected to the middle of the cresol tower, the reflux pump is connected with the cresol tower and a cresol tank, and the bottom of the cresol tower is connected with a liquid pump and then connected with a recovery tower in an adjacent recovery system;
recovery tower, condenser, reflux tank, backwash pump link to each other in proper order among the recovery system, and the recovery tower bottom links to each other with the reboiler back and connects at the recovery tower middle part, and the backwash pump links to each other with recovery tower, cresol tower, and it links to each other with mixed miscellaneous phenol jar after being connected with the liquid pump to retrieve hydrogen tower bottom.
Preferably, the reboiler is connected with a heat-conducting oil return tank and a heat-conducting oil feeding tank, a flow valve and a flow meter are arranged between the heat-conducting oil feeding tank and the reboiler, and a heat-insulating layer is arranged on the surface of the reboiler.
Preferably, the condenser is connected with the vent pipe, the condenser is connected with the upper water tank of the circulating cooling water and the return water tank of the circulating cooling water, a filter and a butterfly valve are arranged between the condenser and the upper water tank of the circulating cooling water, and the butterfly valve is arranged between the condenser and the return water tank of the circulating cooling water.
Preferably, the reflux tank is respectively connected with the vacuum pipe, the emptying pipe and the nitrogen tank, and is provided with a thermometer, a pressure gauge and a liquid level gauge.
Preferably, a filter is provided before the reflux pump, and a check valve is provided after the reflux pump.
Preferably, a filter is arranged before the liquid pump, and a check valve, a liquid level valve and a flow meter are arranged after the liquid pump
Preferably, in the dehydration tower, the de-heavy tower, the phenol tower, the o-cresol dehydrogenation tower, the o-cresol tower, the cresol dehydrogenation tower, the cresol tower and the recovery tower, the lower parts are all provided with liquid level meters, the upper parts and the middle parts are provided with pressure meters, and the tower body is provided with a plurality of thermometers from top to bottom.
Preferably, a flow meter and a flow valve are further arranged between the reflux pump and the dehydration tower in the dehydration system, the flow meter and the flow valve are further arranged between the reflux pump and the de-weighting tower in the de-weighting system, the flow meter and the flow valve are further arranged between the reflux pump and the phenol tower in the phenol rectification system, the flow meter and the flow valve are further arranged between the reflux pump and the o-cresol dehydrogenation tower in the o-cresol separation system, the flow meter and the flow valve are further arranged between the reflux pump and the o-cresol tower in the o-cresol rectification system, the flow meter and the flow valve are further arranged between the reflux pump and the cresol dehydrogenation tower in the cresol separation system, the flow meter and the flow valve are further arranged between the reflux pump and the cresol tower in the cresol rectification system, and the flow meter and the.
Preferably, a liquid level valve is further arranged between the reflux pump and the phenol tower in the de-weighting system, a liquid level valve is further arranged between the reflux pump and the phenol tank in the phenol rectification system, a liquid level valve is further arranged between the reflux pump and the phenol tower in the o-cresol separation system, a liquid level valve is further arranged between the reflux pump and the o-cresol tank in the o-cresol rectification system, a liquid level valve is further arranged between the reflux pump and the o-cresol tower in the cresol separation system, a liquid level valve is further arranged between the reflux pump and the cresol tank in the cresol rectification system, and a liquid level valve is further arranged between the reflux pump and the cresol tower in the recovery system.
Preferably, the outer surfaces of the dehydration tower, the de-heavy tower, the phenol tower, the o-cresol dehydrogenation tower, the o-cresol tower, the cresol dehydrogenation tower, the cresol tower and the recovery tower are all provided with heat insulation layers.
Dewatering and deslagging:
pumping the crude phenol to the middle part of a dehydration tower from a crude phenol storage tank, simultaneously starting a vacuum system for vacuumizing (under the normal working state, the top pressure of the dehydration tower is 15kPa, the temperature is 55.8 ℃, the pressure of a tower kettle is 16kPa, and the temperature is 132.6 ℃), and heating the bottom of the dehydration tower by adopting a reboiler (the heating medium of the reboiler is heat conducting oil, the feeding temperature of the heat conducting oil is 300 ℃, and the discharging temperature is 250 ℃); the light crude phenol (water, neutral oil, and a small amount of phenol) in the crude phenol comes out from the top of the dehydration tower, is condensed by a dehydration tower condenser (the cooling medium is circulating water inlet temperature is 32 ℃, and the water outlet temperature is 37 ℃) and then enters a dehydration tower reflux tank through a pipeline, the water phase in the reflux tank is discharged intermittently, and the rest liquid is pumped to the top of the dehydration tower through the dehydration tower reflux pump to be used as reflux liquid. And the tower kettle material of the dehydration tower is pumped to the de-heavy tower by a dehydration tower kettle liquid pump.
The material from the liquid pump of the dehydration tower kettle is sent to the middle part of the heavy component removal tower, the pressure at the top of the tower is 15kPa, the temperature is 129.6 ℃, the pressure at the bottom of the tower is 16kPa, the temperature is 158 ℃, and the bottom of the tower is heated by a reboiler (the heating medium of the reboiler is heat conducting oil, the feeding temperature of the heat conducting oil is 300 ℃, and the discharging temperature is 250 ℃) under the normal working state of the heavy component removal tower. Heavy components (slag phenol) are obtained from the tower kettle of the de-heavy tower and are sent to a slag phenol tank for temporary storage; all materials except the residual phenol are extracted from the tower top, the materials at the tower top are sent to a condenser at the tower top of the de-heavy tower through a pipeline (the cooling medium is the circulating water inlet temperature is 32 ℃, and the water outlet temperature is 37 ℃) for condensation and then enter a reflux tank of the de-heavy tower through the pipeline, the materials in the reflux tank are extracted by a reflux pump of the de-heavy tower and then are divided into two strands, one strand is used as reflux liquid at the tower top of the de-heavy tower, and the other strand is sent to the phenol tower for further rectification.
The dehydration and the deslagging are carried out under negative pressure, and in order to keep the tower top vacuum degrees of the dehydration tower and the heavy component removal tower, the tower top pressure and a regulating valve on a vacuum pipeline form a pressure control loop for regulation. The temperature of the tower kettle is controlled by a cascade loop formed by the temperature of the lowest tower plate in the tower and a flow regulating loop of a heat conducting oil inlet pipeline of the reboiler.
A phenol rectification separation unit:
the method comprises the following steps that materials from a reflux pump of a de-weighting tower enter the middle part of a phenol tower, the pressure at the top of the phenol tower is 15kPa under the normal working state of the phenol tower, the temperature is 123.8 ℃, the pressure at the bottom of the phenol tower is 16kPa, the temperature is 140 ℃, and a reboiler is adopted at the bottom of the phenol tower (the heating medium of the reboiler is heat conduction oil, the feeding temperature of the heat conduction oil is 300 ℃, and the discharging temperature is 250 ℃); finished phenol is extracted from the top of the phenol tower and is sent to a condenser (the cooling medium is circulating water with the inflow temperature of 32 ℃ and the outflow temperature of 37 ℃) at the top of the phenol tower through a pipeline to be condensed and then enters a phenol tower reflux tank through the pipeline, the material in the reflux tank is pumped out by a phenol tower reflux pump and then is divided into two parts, one part is used as phenol tower top reflux liquid, and the other part is sent to the phenol tank for temporary storage; the phenol tower bottom material is pumped out by a phenol tower bottom liquid pump and sent to an o-cresol light component removal tower for further rectification.
The phenol rectification is carried out under negative pressure, and in order to maintain the tower top vacuum degree of the phenol tower, the tower top pressure and a regulating valve on a vacuum pipeline form a pressure control loop for regulation. The temperature of the tower kettle is controlled by a cascade loop formed by the temperature of the lowest tower plate in the tower and a flow regulating loop of a heat conducting oil inlet pipeline of the reboiler.
An o-cresol rectification separation unit:
because the material in the bottom of the phenol tower also contains a small amount of phenol, in order to ensure the quality of the o-cresol, the material is rectified in an o-cresol lightness-removing tower before entering an o-cresol rectifying tower so as to further remove the residual phenol in the material.
The method comprises the following steps that materials from a liquid pump of a phenol tower kettle enter the middle part of an o-cresol light-removing tower, the pressure of the top of the o-cresol light-removing tower is 15kPa under the normal working state, the temperature is 127 ℃, the pressure of the tower kettle is 17kPa, the temperature is 142.3 ℃, and a reboiler is adopted at the bottom of the tower (the heating medium of the reboiler is heat conduction oil, the feeding temperature of the heat conduction oil is 300 ℃, and the discharging temperature is 250 ℃); residual phenol is extracted from the top of the o-cresol lightness-removing tower and carries a small amount of o-cresol, the phenol is sent to a condenser at the top of the cresol lightness-removing tower through a pipeline (the cooling medium is the inlet temperature of circulating water is 32 ℃, the outlet temperature is 37 ℃) and condensed, then the condensed phenol enters a reflux tank of the o-cresol lightness-removing tower through a pipeline, the material in the reflux tank is pumped out by a reflux pump of the o-cresol lightness-removing tower and then is divided into two strands, one strand is used as reflux liquid at the top of the o-cresol lightness-removing tower, and the other strand returns to a feeding pipeline of the phenol tower through a; the material in the bottom of the o-cresol lightness-removing tower is pumped out by a liquid pump in the bottom of the o-cresol lightness-removing tower and is sent to the o-cresol tower for further rectification.
The material pumped out by the liquid pump of the o-cresol lightness removing tower kettle enters the middle part of the o-cresol tower, the pressure at the top of the tower is 15kPa, the temperature is 130.2 ℃, the pressure at the bottom of the tower is 16kPa, the temperature is 143.7 ℃, and the bottom of the tower is heated by a reboiler (the heating medium of the reboiler is heat conducting oil, the feeding temperature of the heat conducting oil is 300 ℃, and the discharging temperature is 250 ℃) under the normal working state of the o-cresol tower. Collecting finished o-cresol from the top of the o-cresol tower, condensing the finished o-cresol by a pipeline, conveying the condensed o-cresol to a condenser (the cooling medium is circulating water with the water inlet temperature of 32 ℃ and the water outlet temperature of 37 ℃) at the top of the o-cresol tower, and then conveying the condensed o-cresol into a o-cresol tower reflux tank by a pipeline, wherein the material in the reflux tank is pumped by a o-cresol tower reflux pump and then divided into two parts, one part is used as o-cresol tower top reflux liquid, and the other part is conveyed to the o; the material in the o-cresol tower kettle is pumped out by an o-cresol tower kettle liquid pump and sent to a cresol lightness-removing tower for further rectification.
The o-cresol rectification is carried out under negative pressure, and in order to keep the vacuum degrees of the tops of the o-cresol lightness-removing tower and the o-cresol tower, the pressure of the top of the tower and a regulating valve on a vacuum pipeline form a pressure control loop for regulation. The temperature of the tower kettle is controlled by a cascade loop formed by the temperature of the lowest tower plate in the tower and a flow regulating loop of a heat conducting oil inlet pipeline of the reboiler.
A cresol rectification separation unit:
because the material in the tower bottom of the o-cresol tower also contains a small amount of o-cresol, in order to ensure the quality of the cresol, the material is rectified in a cresol lightness-removing tower before entering a cresol rectifying tower so as to further remove the residual o-cresol in the material.
The method comprises the following steps that materials from an o-cresol tower kettle liquid pump enter the middle part of a cresol lightness-removing tower, the pressure at the top of the cresol lightness-removing tower is 15kPa under the normal working state, the temperature is 140.8 ℃, the pressure at the bottom of the cresol lightness-removing tower is 16kPa, the temperature is 143.7 ℃, and a reboiler is adopted at the bottom of the cresol lightness-removing tower (the heating medium of the reboiler is heat conduction oil, the feeding temperature of the heat conduction oil is 300 ℃, and the discharging temperature is 250 ℃); residual o-cresol is extracted from the top of a cresol lightness-removing tower and carries a small amount of cresol, the o-cresol is sent to a condenser at the top of the cresol lightness-removing tower through a pipeline (the cooling medium is circulating water with the water inlet temperature of 32 ℃ and the water outlet temperature of 37 ℃) and condensed, then the condensed o-cresol enters a cresol lightness-removing tower reflux tank through a pipeline, the material in the reflux tank is pumped out by a cresol lightness-removing tower reflux pump and then divided into two parts, one part is used as the cresol lightness-removing tower top reflux liquid, and the other part returns to a feeding pipeline of the o-cresol tower through a pipeline for rectification separation; the material in the bottom of the cresol lightness-removing tower is pumped out by a liquid pump in the bottom of the cresol lightness-removing tower and is sent to the cresol tower for further rectification.
The method comprises the following steps that materials pumped out by a liquid pump at the bottom of a cresol lightness removing tower enter the middle part of a cresol tower, the pressure at the top of the cresol tower is 50kPa under the normal working state of the cresol tower, the temperature is 177 ℃, the pressure at the bottom of the cresol tower is 51kPa under the temperature of 178.9 ℃, and a reboiler is adopted at the bottom of the cresol tower (the heating medium of the reboiler is heat conduction oil, the feeding temperature of the heat conduction oil is 300 ℃, and the discharging temperature is 250 ℃); collecting finished cresol from the top of a cresol tower, condensing the finished cresol by a condenser (the cooling medium is circulating water with the inlet water temperature of 32 ℃ and the outlet water temperature of 37 ℃) at the top of the cresol tower through a pipeline, and then feeding the condensed finished cresol into a cresol tower reflux tank through the pipeline, wherein the material in the reflux tank is pumped out by a cresol tower reflux pump and then divided into two parts, one part is used as cresol tower top reflux liquid, and the other part is sent to the cresol tank for temporary storage; the cresol tower kettle material is pumped out by a cresol tower kettle liquid pump and sent to a recovery tower.
The material pumped out by the cresol tower kettle liquid pump enters the middle part of the recovery tower, the pressure at the top of the tower is 50kPa, the temperature is 177.1 ℃, the pressure at the bottom of the tower is 52kPa, the temperature is 181.1 ℃ and the bottom of the tower is heated by a reboiler (the heating medium of the reboiler is heat-conducting oil, the feeding temperature of the heat-conducting oil is 300 ℃, and the discharging temperature is 250 ℃) under the normal working state of the recovery tower. Residual cresol is extracted from the top of the recovery tower and is sent to a condenser (the cooling medium is circulating water with the water inlet temperature of 32 ℃ and the water outlet temperature of 37 ℃) at the top of the recovery tower through a pipeline to be condensed and then enters a reflux tank of the recovery tower, the material in the reflux tank is pumped out by a reflux pump of the recovery tower and then is divided into two strands, one strand is used as reflux liquid at the top of the recovery tower, and the other strand is returned to a feed pipeline of the cresol tower to be rectified again. The material (mixed impure phenol) at the bottom of the recovery tower is pumped out by a liquid pump at the bottom of the recovery tower and sent to a mixed impure phenol tank for temporary storage.
The cresol rectification is carried out under negative pressure, and in order to maintain the top vacuum degree of the cresol lightness-removing column and the cresol column, the top pressure and a regulating valve on a vacuum pipeline form a pressure control loop for regulation. The temperature of the tower kettle is controlled by a cascade loop formed by the temperature of the lowest tower plate in the tower and a flow regulating loop of a heat conducting oil inlet pipeline of the reboiler.
The utility model discloses well each equipment is connected through the pipeline, can set up the play of corresponding kind and quantity as required on the pipeline between equipment the utility model discloses well valve pointed out.
Therefore, the utility model discloses following beneficial effect has:
the utility model discloses can realize the separation and purification of various phenols in the crude phenol high-efficiently, separate and retrieve phenol, o-cresol and cresol etc. wherein, it can also reduce poisonous and harmful substance such as tail gas, waste water and discharge to improve the rate of recovery of phenols, reduce energy consumption and cost.
Drawings
FIG. 1 is a schematic view of a rectification separation system in example 1;
in the figure: a crude phenol storage tank 10, a dehydrating tower 11, a de-heavy tower 12, a phenol tower 13, an o-cresol dehydrogenation tower 14, an o-cresol tower 15, a cresol dehydrogenation tower 16, a cresol tower 17 and a recovery tower 18;
a condenser 21, a reflux tank 22, a reflux pump 23, a reboiler 24, and a liquid pump 25;
a waste water tank 31, a residual phenol tank 32, a phenol tank 33, an o-cresol tank 34, a cresol tank 35 and a mixed impure phenol tank 36;
a flow meter 41, a pressure gauge 42, a thermometer 43 and a liquid level meter 44;
flow valve 51, level valve 52, filter 53, butterfly valve 54, check valve 55;
the device comprises a heat insulation layer 61, a heat conduction oil return tank 62, a heat conduction oil feeding tank 63, a vent pipe 64, a circulating cooling water upper water tank 65, a circulating cooling water return tank 66, a vacuum pipe 67 and a nitrogen tank 68.
Detailed Description
The technical solution of the present invention will be further described with reference to the following embodiments.
It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the present invention, all the equipments and materials are commercially available or commonly used in the industry, and the methods in the following examples are conventional in the art unless otherwise specified.
Example 1
As shown in fig. 1, a rectification separation system is composed of a dehydration system, a de-heavy system, a phenol rectification system, an o-cresol separation system, an o-cresol rectification system, a cresol separation system, a cresol rectification system and a recovery system;
a crude phenol storage tank 10, a dehydration tower 11, a condenser 21, a reflux tank 22 and a reflux pump 23 in the dehydration system are sequentially connected, the bottom of the dehydration tower is connected with a reboiler 24 and then connected to the middle of the dehydration tower, the bottom of the reflux tank is connected with a wastewater pond 31, and the bottom of the dehydration tower is connected with a liquid pump 25 and then connected with a heavy component removal tower in the heavy component removal system; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the dehydration tower;
a heavy component removal tower 12, a condenser 21, a reflux tank 22 and a reflux pump 23 in the heavy component removal system are sequentially connected, the bottom of the heavy component removal tower is connected with a reboiler 24 and then connected to the middle of the heavy component removal tower, the reflux pump 23 is connected with the heavy component removal tower and a phenol tower 13 in a phenol rectification system, and the bottom of the heavy component removal tower is connected with a liquid pump 25 and then connected with a residue phenol tank 32; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the de-weighting tower, and a liquid level valve 52 is arranged between the reflux pump and the phenol tower;
a phenol tower 13, a condenser 21, a reflux tank 22 and a reflux pump 23 in a phenol rectification system are sequentially connected, the bottom of the phenol tower is connected with a reboiler 24 and then connected to the middle of the phenol tower, the reflux pump is connected with the phenol tower and a phenol tank 33, and the bottom of the phenol tower is connected with a liquid pump 25 and then connected with an o-cresol dehydrogenation tower 14 in an o-cresol separation system; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the phenol tower, and a liquid level valve 52 is arranged between the reflux pump and the phenol tank;
an o-cresol dehydrogenation tower 14, a condenser 21, a reflux tank 22 and a reflux pump 23 in an o-cresol separation system are sequentially connected, the bottom of the o-cresol dehydrogenation tower is connected with a reboiler 24 and then connected to the middle of the o-cresol dehydrogenation tower, the reflux pump is connected with the o-cresol dehydrogenation tower 14 and a phenol tower 13, and the bottom of the o-cresol dehydrogenation tower is connected with a liquid pump 25 and then connected with an o-cresol tower 15 in an o-cresol rectification system; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the o-cresol dehydrogenation tower, and a liquid level valve 52 is arranged between the reflux pump and the phenol tower;
an o-cresol tower 15, a condenser 21, a reflux tank 22 and a reflux pump 23 in an o-cresol rectification system are sequentially connected, the bottom of the o-cresol tower is connected with a reboiler 24 and then connected to the middle of the o-cresol tower, the reflux pump is connected with the o-cresol tower and an o-cresol tank 34, and the bottom of the o-cresol tower is connected with a liquid pump 25 and then connected with a cresol dehydrogenation tower 16 in a cresol separation system; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the o-cresol tower, and a liquid level valve 52 is arranged between the reflux pump and the o-cresol tank;
a cresol dehydrogenation tower 16, a condenser 21, a reflux tank 22 and a reflux pump 23 in the cresol separation system are sequentially connected, the bottom of the cresol dehydrogenation tower is connected with a reboiler 24 and then connected to the middle of the cresol dehydrogenation tower, the reflux pump is connected with the cresol dehydrogenation tower and an o-cresol tower, and the bottom of the cresol dehydrogenation tower is connected with a liquid pump 25 and then connected with the cresol tower in a cresol rectification system; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the cresol dehydrogenation tower, and a liquid level valve 52 is arranged between the reflux pump and the o-cresol tower;
a cresol tower 17, a condenser 21, a reflux tank 22 and a reflux pump 23 in the cresol rectifying system are sequentially connected, the bottom of the cresol tower is connected with a reboiler 24 and then connected to the middle of the cresol tower, the reflux pump is connected with the cresol tower and a cresol tank 35, and the bottom of the cresol tower is connected with a liquid pump 25 and then connected with a recovery tower 18 in an adjacent recovery system; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the cresol tower, and a liquid level valve 52 is arranged between the reflux pump and the cresol tank;
a recovery tower 18, a condenser 21, a reflux tank 22 and a reflux pump 23 in the recovery system are sequentially connected, the bottom of the recovery tower is connected with a reboiler 24 and then connected to the middle of the recovery tower, the reflux pump is connected with the recovery tower and a cresol tower, and the bottom of the recovery hydrogen tower is connected with a liquid pump 25 and then connected with a mixed impure phenol tank 36; a flow meter 41 and a flow valve 51 are arranged between the reflux pump and the recovery tower, and a liquid level valve 52 is arranged between the reflux pump and the cresol tower.
The lower parts of the dehydration tower, the de-heavy tower, the phenol tower, the o-cresol dehydrogenation tower, the o-cresol tower, the cresol dehydrogenation tower, the cresol tower and the recovery tower are all provided with liquid level gauges 44, the upper parts and the middle parts of the dehydration tower, the phenol tower, the o-cresol dehydrogenation tower, the cresol tower and the recovery tower are provided with pressure gauges 42, the tower body is provided with 7 thermometers 43 at equal intervals from top to bottom, and the outer surfaces of the dehydration tower; the reboiler is connected with a heat-conducting oil return tank 62 and a heat-conducting oil feeding tank 63, a flow valve 51 and a flow meter 41 are arranged between the heat-conducting oil feeding tank and the reboiler, and a heat-insulating layer 61 is arranged on the surface of the reboiler; the condenser is connected with an emptying pipe 64, the condenser is connected with a circulating cooling water upper water tank 65 and a circulating cooling water return tank 66, a filter 53 and a butterfly valve 54 are arranged between the condenser and the circulating cooling water upper water tank, and the butterfly valve 54 is arranged between the condenser and the circulating cooling water return tank; the reflux tank is respectively connected with a vacuum pipe 67, an emptying pipe 64 and a nitrogen tank 68, and is provided with a thermometer 43, a pressure gauge 42 and a liquid level gauge 44;
a filter 53 is arranged in front of the reflux pump, and a check valve 55 is arranged behind the reflux pump; the liquid pump is preceded by a filter 53 and followed by a check valve 55, a level valve 52 and a flow meter 41.
It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A rectification separation system is characterized in that:
the system consists of a dehydration system, a de-heavy system, a phenol rectification system, an o-cresol separation system, an o-cresol rectification system, a cresol separation system, a cresol rectification system and a recovery system;
in the dehydration system, a crude phenol storage tank, a dehydration tower, a condenser, a reflux tank and a reflux pump are connected, the bottom of the dehydration tower is connected with a reboiler and then connected with the middle of the dehydration tower, the reflux tank is connected with a wastewater pond, and the dehydration tower is connected with a liquid pump and a heavy component removal tower;
in the heavy component removal system, a heavy component removal tower, a condenser, a reflux tank and a reflux pump are connected, the bottom of the heavy component removal tower is connected with a reboiler and then connected with the middle part of the heavy component removal tower, the reflux pump is connected with the heavy component removal tower and a phenol tower, and the heavy component removal tower is connected with a liquid pump and a residue phenol tank;
in the phenol rectification system, a phenol tower, a condenser, a reflux tank and a reflux pump are connected, the bottom of the phenol tower is connected with a reboiler and then connected with the middle of the phenol tower, the reflux pump is connected with the phenol tower and a phenol tank, and the phenol tower is connected with a liquid pump and an o-cresol dehydrogenation tower;
an o-cresol dehydrogenation tower, a condenser, a reflux tank and a reflux pump in the o-cresol separation system are connected, the bottom of the o-cresol dehydrogenation tower is connected with a reboiler and then connected with the middle of the o-cresol dehydrogenation tower, the reflux pump is connected with the o-cresol dehydrogenation tower and a phenol tower, and the o-cresol dehydrogenation tower is connected with a liquid pump and the o-cresol tower;
an o-cresol tower, a condenser, a reflux tank and a reflux pump in the o-cresol rectification system are connected, the bottom of the o-cresol tower is connected with a reboiler and then connected with the middle of the o-cresol tower, the reflux pump is connected with the o-cresol tower and an o-cresol tank, and the o-cresol tower is connected with a liquid pump and a cresol dehydrogenation tower;
a cresol dehydrogenation tower, a condenser, a reflux tank and a reflux pump in the cresol separation system are connected, the bottom of the cresol dehydrogenation tower is connected with a reboiler and then connected with the middle of the cresol dehydrogenation tower, the reflux pump is connected with the cresol dehydrogenation tower and an o-cresol tower, and the cresol dehydrogenation tower is connected with a liquid pump and the cresol tower;
a cresol tower, a condenser, a reflux tank and a reflux pump in the cresol rectification system are connected, the bottom of the cresol tower is connected with a reboiler and then connected with the middle of the cresol tower, the reflux pump is connected with the cresol tower and a cresol tank, and the cresol tower is connected with a liquid pump and a recovery tower;
recovery tower, condenser, reflux tank, backwash pump link to each other among the recovery system, and recovery tower bottom links to each other with the reboiler back and is connected with the recovery tower middle part, and the backwash pump links to each other with recovery tower, cresol tower, and recovery hydrogen tower links to each other with liquid pump, mixed miscellaneous phenol jar.
2. A rectification separation system in accordance with claim 1, wherein:
the reboiler links to each other with conduction oil return tank and conduction oil oiling jar, the conduction oil go up and be equipped with flow valve and flow meter between oil tank and the reboiler, the reboiler surface be equipped with the heat preservation.
3. A rectification separation system in accordance with claim 1, wherein:
the condenser links to each other with the blow-down pipe, the condenser links to each other with circulative cooling water pitcher and circulative cooling water return jar, be equipped with filter and butterfly valve between condenser and the circulative cooling water pitcher, be equipped with the butterfly valve between condenser and the circulative cooling water return jar.
4. A rectification separation system in accordance with claim 1, wherein:
the reflux tank is connected with the vacuum tube, the emptying pipe and the nitrogen tank respectively, and is provided with a thermometer, a pressure gauge and a liquid level gauge.
5. A rectification separation system in accordance with claim 1, wherein:
a filter is arranged in front of the backflow pump, and a check valve is arranged behind the backflow pump.
6. A rectification separation system in accordance with claim 1, wherein:
the liquid pump is provided with a filter in front of the liquid pump, and the liquid pump is provided with a check valve, a liquid level valve and a flow meter behind the liquid pump.
7. A rectification separation system in accordance with claim 1, wherein:
in dehydration tower, heavy tower, phenol tower, o-cresol dehydrogenation tower, o-cresol tower, cresol dehydrogenation tower, cresol tower and the recovery tower, the lower part all is equipped with the liquid level table, and upper portion and middle part are equipped with the manometer, and the body of the tower from top to bottom is equipped with a plurality of thermometers.
8. A rectification separation system according to claim 5, characterized in that:
still be equipped with flow meter and flow valve between backwash pump and the dehydration tower among the dewatering system, it still is equipped with flow meter and flow valve between backwash pump and the heavy tower of heavy-duty to take off among the heavy-duty system, still be equipped with flow meter and flow valve between backwash pump and the phenol tower among the phenol rectification system among the phenol separation system, still be equipped with flow meter and flow valve between backwash pump and the o-cresol dehydrogenation tower among the o-cresol piece-rate system, still be equipped with flow meter and flow valve between backwash pump and the o-cresol tower among the o-cresol rectification system, still be equipped with flow meter and flow valve between backwash pump and the cresol dehydrogenation tower among the cresol separation system, still be equipped with flow meter and flow valve between backwash pump and the cresol tower among the cresol rectification system, still be equipped with flow meter and flow valve between recovery system backwash pump.
9. A rectification separation system according to claim 5, characterized in that:
still be equipped with the liquid level valve between backwash pump and the phenol tower in the heavy system of taking off, still be equipped with the liquid level valve between backwash pump and the phenol jar in the phenol rectification system, still be equipped with the liquid level valve between backwash pump and the phenol tower in the o-cresol separation system, still be equipped with the liquid level valve between backwash pump and the o-cresol jar in the o-cresol rectification system, still be equipped with the liquid level valve between backwash pump and the o-cresol tower in the cresol separation system, still be equipped with the liquid level valve between backwash pump and the cresol jar in the cresol rectification system, still be equipped with the liquid level valve between recovery system backwash pump and the cresol tower.
10. A rectification separation system in accordance with claim 1, wherein:
and the outer surfaces of the dehydration tower, the de-heavy tower, the phenol tower, the o-cresol dehydrogenation tower, the o-cresol tower, the cresol dehydrogenation tower, the cresol tower and the recovery tower are all provided with heat preservation layers.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114436784A (en) * | 2022-01-27 | 2022-05-06 | 平罗县晟华工贸有限公司 | Cresol antioxidant color fixing production method and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114436784A (en) * | 2022-01-27 | 2022-05-06 | 平罗县晟华工贸有限公司 | Cresol antioxidant color fixing production method and system |
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