Tertiary butyl phenol outfeed packaging system

Abstract

The utility model relates to tertiary butyl phenol production technical field, concretely is tertiary butyl phenol discharge packing system. Tertiary butyl phenol discharge packing system, including renewable molecular sieve tank, renewable molecular sieve tank is connected with raw material tank through pressure stabilizing tank, and raw material tank is connected with storage temporary storage tank through backwashing filter, and storage temporary storage tank is connected with conveyer belt through scraper forming machine, and conveyer belt is connected with nitrogen replacement temporary storage bin through vacuum nitrogen filling packing machine, and backwashing filter is connected with flushing water storage tank. The system is through renewable molecular sieve tank deep drying nitrogen, inert gas atmosphere whole process protection (raw material tank pre-charging nitrogen, storage temporary storage tank micro positive pressure control, vacuum nitrogen filling packing), from the source isolates oxygen, significantly reduces tertiary butyl phenol oxidation risk, stabilizes product colority and chemical purity.

Description

Technical Field

[0001] This utility model relates to the field of tert-butylphenol production technology, specifically to a tert-butylphenol discharge and packaging system. Background Technology

[0002] tert-Butylphenol is an important phenolic compound widely used in pharmaceutical intermediates, resin synthesis, antioxidant production, and other fields. It is chemically reactive and readily undergoes oxidation reactions with oxygen in the air, generating colored impurities such as quinones, which leads to a darker color in the product and affects the purity requirements of downstream applications.

[0003] The existing equipment has several problems during the production, discharge, and packaging of tert-butylphenol in the workshop. Incomplete isolation between the production system and air, unstable nitrogen purity (oxygen and moisture content) and large pressure fluctuations in the nitrogen protection scheme can easily cause air backflow, leading to tert-butylphenol oxidation and a decline in product quality. Tert-butylphenol has a certain viscosity and easily solidifies at low temperatures; furthermore, solid impurities such as coking particles may be mixed in the raw materials, easily clogging conveying pipes or scraping equipment and causing production interruptions. The waste heat generated during nitrogen drying and purification is not utilized and is directly discharged after inert solvent cleaning, increasing energy consumption and production costs. After production stops, residual tert-butylphenol on the inner walls of pipes and equipment is prone to oxidation and scaling; manual cleaning is inefficient and difficult to completely remove, affecting the purity of materials in subsequent production. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a tert-butylphenol discharge and packaging system. Through the deep drying of nitrogen in a renewable molecular sieve tank and the full protection of an inert gas atmosphere (pre-filling nitrogen in the raw material tank, micro-positive pressure control in the storage tank, and vacuum nitrogen filling packaging), oxygen is isolated from the source, significantly reducing the risk of tert-butylphenol oxidation and stabilizing the product color and chemical purity.

[0005] This utility model is achieved using the following technical solution:

[0006] The aforementioned tert-butylphenol discharge and packaging system includes a regenerable molecular sieve tank, which is connected to a raw material tank via a pressure stabilizing tank. The raw material tank is connected to a storage tank via a backwash filter. The storage tank is connected to a conveyor belt via a scraper forming machine. The conveyor belt is connected to a nitrogen replacement storage chamber via a vacuum nitrogen-filling packaging machine. A flushing water storage tank is connected to the backwash filter.

[0007] The regenerable molecular sieve tank contains a regenerable molecular sieve, is wrapped with an external insulation layer, and has an internal cooling coil. Regeneration gas (hot nitrogen) can be introduced through an inert gas inlet pipe. The molecular sieve is deeply dried with nitrogen (water removal efficiency ≥99%) and can be reused through regeneration (reducing consumable costs). The cooling coil recovers waste heat from the regeneration stage to preheat the flushing water, achieving energy savings.

[0008] The regenerable molecular sieve tank is connected to an inert gas inlet pipe, and the pressure stabilizing tank is connected to the storage tank via a pipe. The storage tank is equipped with a pressure sensor.

[0009] The regenerable molecular sieve tank is equipped with a cooling coil inside, and a cooling liquid inlet pipe is connected to the cooling coil. The flushing water storage tank is equipped with a flushing water storage tank coil inside, and the cooling coil is connected to the flushing water storage tank coil through a heating pipe.

[0010] The backwash filter has a screen pore size of ≤0.5mm and is equipped with an automatic backwash valve that is linked to the backwash water storage tank. It can efficiently intercept solid impurities in raw materials (interception efficiency ≥99%), and the filter screen can be automatically cleaned through backwashing, reducing manual maintenance and preventing equipment blockage.

[0011] A circulating discharge pump is provided between the raw material tank and the backwash filter. The bottom of the raw material tank is connected to the inlet of the circulating discharge pump through a pipe, and the circulating discharge pump is connected to the top of the raw material tank through a circulating pipe.

[0012] The tert-butylphenol discharge and packaging system also includes an inert solvent storage tank, which is connected to a circulating discharge pump via an inert solvent inlet pipe, and a valve is provided on the inert solvent inlet pipe.

[0013] The circulation pipeline is connected to the flushing liquid recovery tank via an inert solvent recovery pipeline, and the inert solvent recovery pipeline is equipped with a valve.

[0014] The working principle of this utility model is as follows:

[0015] Nitrogen pretreatment stage: Inert gas (such as nitrogen) is introduced into the regenerable molecular sieve tank via an inert gas pipeline. The molecular sieve operates at a temperature of 20-40℃, drying the nitrogen (dew point ≤ -40℃). The treated nitrogen then enters a pressure stabilizing tank, maintaining an internal pressure of 0.05-0.1MPa for stable output. After drying in the regenerable molecular sieve tank, a portion of the nitrogen is piped into the raw material tank, maintaining a slight positive pressure (0.01-0.03MPa) to create a pre-protective atmosphere. The remaining portion is piped to a temporary storage tank to compensate for pressure losses during storage.

[0016] Raw material conveying and pretreatment stage: Tert-butylphenol in the raw material tank is maintained in a molten state (temperature 60-70℃, controlled by jacket heating); the speed of the circulating discharge pump is adjusted to 50-100 r / min to ensure uniform material conveying. The tert-butylphenol in the raw material tank enters the circulating discharge pump through the bottom pipe. A portion passes through the backwash filter (screen mesh size ≤0.5mm) and enters the temporary storage tank, while the other portion flows back to the top of the raw material tank through the circulation pipe, forming a dynamic circulation and preventing material from solidifying. The backwash filter automatically starts backwashing every 2 hours: water in the flushing water storage tank (temperature 40-50℃, preheated by the residual heat of the molecular sieve through the flushing water storage tank coil) enters the filter through the pipe, backwashing the filter screen and removing trapped impurities.

[0017] Flake and Packaging Stage: Pressure in the storage tank is monitored in real-time by a pressure sensor to maintain a slight positive pressure (0.02-0.04 MPa). If the pressure falls below the threshold, the pressure stabilizing tank automatically replenishes nitrogen. The flake forming machine operates at a temperature of 50-60℃ to ensure material flowability. Tert-butylphenol in the storage tank enters the flake forming machine, where it is processed into flakes or granules and conveyed to the vacuum nitrogen-filled packaging machine. The vacuum nitrogen-filled packaging machine first evacuates the vacuum (residual pressure ≤1 kPa), then fills it with high-purity nitrogen (oxygen content ≤10 ppm), and subsequently seals the packaging. The packaged product then enters a nitrogen-purified storage chamber (maintaining a slight positive pressure of 0.01-0.02 MPa) for temporary storage.

[0018] Shutdown and cleaning phase: Inert solvent (e.g., isopropanol) temperature 30-40℃, circulating flushing pressure 0.2-0.3MPa. Close the raw material delivery valve. The solvent in the inert solvent storage tank enters the circulating discharge pump through the inert solvent inlet pipeline, sequentially flushing the raw material tank, backwash filter, storage tank, and connecting pipelines. The flushing waste liquid enters the flushing liquid recovery tank through the inert solvent recovery pipeline, and can be reused after distillation and purification; finally, purge the pipeline with nitrogen for 20-30 minutes to ensure no solvent residue.

[0019] Compared with the prior art, the beneficial effects of this utility model are:

[0020] (1) Through the deep drying of nitrogen in the renewable molecular sieve tank and the full protection of the inert gas atmosphere (pre-filling nitrogen in the raw material tank, micro-positive pressure control in the storage tank, and vacuum nitrogen filling packaging), oxygen is isolated from the source, significantly reducing the risk of oxidation of tert-butylphenol and stabilizing the color and chemical purity of the product.

[0021] (2) The backwash filter can intercept solid impurities in the raw materials and, in conjunction with the dynamic circulation of the circulating discharge pump, prevent the pipes and scraper forming machine from getting clogged; the pressure stabilizing tank stabilizes the nitrogen pressure, reduces protection failures caused by gas source fluctuations, and ensures continuous production operation.

[0022] (3) The cooling coil of the regenerable molecular sieve tank and the flushing water storage tank coil are linked by the heating pipeline to realize waste heat recovery (the high temperature heat after molecular sieve regeneration is used to preheat the flushing water) and reduce energy consumption; the inert solvent circulation flushing and recovery system reduces solvent waste and lowers production costs.

[0023] (4) The backwash filter can be automatically cleaned by the backwash water storage tank. In conjunction with the linkage between the inert solvent storage tank and the circulating discharge pump, the automatic flushing of the pipe and equipment inner wall can be achieved, avoiding the oxidation and scaling of residual materials and reducing manual maintenance costs. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the tert-butylphenol discharge and packaging system of this utility model;

[0025] In the diagram: 1. Renewable molecular sieve tank; 2. Pressure stabilizing tank; 3. Raw material tank; 4. Backwash filter; 5. Temporary storage tank; 6. Scraper forming machine; 7. Conveyor belt; 8. Vacuum nitrogen-filled packaging machine; 9. Nitrogen replacement temporary storage silo; 10. Inert solvent storage tank; 11. Rinse fluid recovery tank; 12. Cooling coil; 13. Rinse water storage tank; 14. Rinse water storage tank coil; 15. Pressure sensor; 16. Circulating discharge pump; 17. Heating pipe; 18. Inert solvent inlet pipe; 19. Inert solvent recovery pipe; 20. Circulation pipe; 21. Inert gas inlet pipe; 22. Cooling liquid inlet pipe. Detailed Implementation

[0026] To make the objectives and technical solutions of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] Example 1

[0028] like Figure 1As shown, the tert-butylphenol discharge and packaging system includes a regenerable molecular sieve tank 1. The regenerable molecular sieve tank 1 is connected to a raw material tank 3 via a pressure stabilizing tank 2. The raw material tank 3 is connected to a storage tank 5 via a backwash filter 4. The storage tank 5 is connected to a conveyor belt 7 via a scraper forming machine 6. The conveyor belt 7 is connected to a nitrogen replacement storage chamber 9 via a vacuum nitrogen-filling packaging machine 8. A flushing water storage tank 13 is connected to the backwash filter 4. An inert gas inlet pipe 21 is connected to the regenerable molecular sieve tank 1. The pressure stabilizing tank 2 is connected to the storage tank 5 via a pipe. A pressure sensor 15 is installed on the storage tank 5. A cooling coil 12 is installed inside the regenerable molecular sieve tank 1. A cooling liquid inlet pipe 22 is connected to the cooling coil 12. A flushing water storage tank coil 14 is installed inside the flushing water storage tank 13. The cooling coil 12 is connected to the flushing water storage tank coil 14 via a heating pipe 17. A circulating discharge pump 16 is installed between the raw material tank 3 and the backwash filter 4. The bottom of the raw material tank 3 is connected to the inlet of the circulating discharge pump 16 via a pipe, and the circulating discharge pump 16 is connected to the top of the raw material tank 3 via a circulating pipe 20. The circulating discharge pump 16 adopts a gear pump structure, is made of corrosion-resistant material, and has one-way valves at both the inlet and outlet, and is linked with the circulating pipe 20 and the inert solvent inlet pipe 18. This integrates the dynamic circulation of materials (to prevent solidification) with the inert solvent rinsing function, improving equipment utilization and simplifying the cleaning process. An inert solvent storage tank 10 is also included. The inert solvent storage tank 10 is connected to the circulating discharge pump 16 via the inert solvent inlet pipe 18, which is equipped with a valve. The circulating pipe 20 is connected to the rinsing liquid recovery tank 11 via the inert solvent recovery pipe 19, which is equipped with a valve.

[0029] The above-mentioned tert-butylphenol discharge and packaging system includes the following steps during operation:

[0030] (1) Inert gas enters the regenerable molecular sieve tank 1 through inert gas inlet pipe 21. The working temperature of the molecular sieve is 20-40℃, and the nitrogen is dried. The treated nitrogen enters the pressure stabilizing tank 2 to maintain the pressure inside the tank at 0.05-0.1MPa and output stably. After the nitrogen is dried in the regenerable molecular sieve tank, part of it enters the raw material tank 3 through the pipe to maintain a slight positive pressure inside the raw material tank and form a pre-protective atmosphere. The other part is connected to the storage tank 5 through the pipe to supplement the pressure loss during the storage process. (2) The tert-butylphenol in the raw material tank 3 is kept in a molten state. The speed of the circulating discharge pump 16 is adjusted to 50-100r / min to ensure uniform material delivery. The tert-butylphenol in the raw material tank enters the circulating discharge pump 16 through the bottom pipe. Part of it is filtered by the backwash filter 4 and enters the storage tank 5. The other part flows back to the top of the raw material tank through the circulating pipe 20 to form a dynamic circulation and avoid the material from solidifying. The backwash filter automatically starts backwashing every 2 hours: the water in the backwash water storage tank 13 enters the filter through the pipeline to backwash the filter screen and remove the trapped impurities. (3) The pressure in the storage tank 5 is monitored in real time by the pressure sensor 15 to maintain a slight positive pressure. If the pressure is lower than the threshold, the pressure stabilizing tank automatically replenishes nitrogen. The working temperature of the scraper forming machine 6 is 50-60℃ to ensure the fluidity of the material. The tert-butylphenol in the storage tank enters the scraper forming machine 6 and is processed into thin sheets or granules. It is then conveyed to the vacuum nitrogen-filling packaging machine 8 by the conveyor belt 7. The vacuum nitrogen-filling packaging machine first draws a vacuum, then fills in high-purity nitrogen, and then seals the packaging. The packaged product enters the nitrogen replacement storage chamber 9 for temporary storage. (4) The inert solvent temperature is 30-40℃ and the circulating flushing pressure is 0.2-0.3MPa. The raw material conveying valve is closed, and the solvent in the inert solvent storage tank 10 enters the circulating discharge pump 16 through the inert solvent entry pipeline 18 to flush the raw material tank, backwash filter, storage tank and connecting pipeline in sequence. The waste liquid after rinsing enters the rinsing liquid recovery tank 11 through the inert solvent recovery pipe 19. After distillation and purification, it can be reused. Finally, the pipe is purged with nitrogen for 20-30 minutes to ensure that there is no solvent residue.

Claims

1. A tert-butylphenol discharging and packaging system, characterized in that, It includes a regenerable molecular sieve tank (1), which is connected to the raw material tank (3) via a pressure stabilizing tank (2). The raw material tank (3) is connected to the storage tank (5) via a backwash filter (4). The storage tank (5) is connected to the conveyor belt (7) via a scraper forming machine (6). The conveyor belt (7) is connected to the nitrogen replacement storage chamber (9) via a vacuum nitrogen filling packaging machine (8). A flushing water storage tank (13) is connected to the backwash filter (4).

2. The tert-butylphenol discharging and packaging system according to claim 1, characterized in that, The regenerable molecular sieve tank (1) is connected to an inert gas inlet pipe (21), and the pressure stabilizing tank (2) is connected to the storage tank (5) through a pipe. The storage tank (5) is equipped with a pressure sensor (15).

3. The tert-butylphenol discharge and packaging system according to claim 1, characterized in that, The regenerable molecular sieve tank (1) is equipped with a cooling coil (12) inside, and a cooling liquid inlet pipe (22) is connected to the cooling coil (12). The flushing water storage tank (13) is equipped with a flushing water storage tank coil (14) inside, and the cooling coil (12) is connected to the flushing water storage tank coil (14) through a heating pipe (17).

4. The tert-butylphenol discharging and packaging system according to claim 1, characterized in that, A circulating discharge pump (16) is provided between the raw material tank (3) and the backwash filter (4). The bottom of the raw material tank (3) is connected to the inlet of the circulating discharge pump (16) through a pipe, and the circulating discharge pump (16) is connected to the top of the raw material tank (3) through a circulating pipe (20).

5. The tert-butylphenol discharge and packaging system according to claim 4, characterized in that, It also includes an inert solvent storage tank (10), which is connected to a circulating discharge pump (16) via an inert solvent inlet pipe (18), and a valve is provided on the inert solvent inlet pipe (18).

6. The tert-butylphenol discharge and packaging system according to claim 4, characterized in that, The circulation pipeline (20) is connected to the flushing liquid recovery tank (11) through the inert solvent recovery pipeline (19), and the inert solvent recovery pipeline (19) is equipped with a valve.

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