Comprehensive training equipment for synthesis and hydrolysis of ethyl acetate

Comprehensive training equipment for synthesis and hydrolysis of ethyl acetate

1Technical characteristics of the device

1Innovative operating mode of the device

The overall configuration of this device can meet two operating modes:

1) Intermittent reaction continuous distillation mode: The device can operate independently as an intermittent esterification reaction and refining equipment to complete the synthesis reaction and refining of ethyl acetate.

2) Fixed bed continuous reaction continuous distillation mode: The device can operate independently as a fixed bed continuous esterification reaction and refining equipment to complete the synthesis reaction and refining of ethyl acetate.

3) Hydrolysis mode: The device can operate as an independent hydrolysis and separation equipment to complete the hydrolysis reaction and product separation of ethyl acetate.

2Diversity of device functions

1) The device has functions of practical training, assessment, competition, and research.

2) Compliant withNational Vocational Skills Standards for Chemical Control WorkersMeet the requirements for training and assessment of intermediate and senior workers, technicians, and senior technicians.

3) The device is designed and manufactured according to industrial standards, close to the actual situation of the factory, and provides an industrial training, assessment, competition, and research platform.

4) Multi professional sharing, availableMeet the needs of chemical engineering, chemical processes, and machineryInstrumentation and AnalysiswaitmajorPractical training and internship.

5) The device can provide training on occupational awareness, knowledge, and skills related to safety, health, and environmental protection.

3Overall design description of the device

1) The synthesis and hydrolysis of the device adopt a production process combining kettle type intermittent reaction, fixed bed catalytic reaction, and continuous distillation. It can continuously produce ethyl acetate using ethanol and acetic acid as raw materials and solid acid as catalyst.

2) The design and manufacturing of the device comply with the requirements of relevant standards such as HG/T 20519-2009 "Chemical Process Design Standard", HG/T20546-2009 "Design Regulations for Equipment Layout of Chemical Plants", HG/T20636-1998 "Design Management Regulations for Automation", HG/T 20508-2014 "Design Specification for Control Room", etc.

3) Main design parameters of the device

The industrial design of the device takes into account various requirements such as process, energy consumption, material consumption, operation, safety, environmental protection, and health. The main equipment, technical parameters, and indicators are shown in the table below (see "Device Configuration List" for details).

4）Device control system

The device control system consists ofComposed of PLC system and on-site operation console, located in the physical device area, it can achieve operation control of the device on site.

5) Plant utilities

The public works are divided into four parts: circulating cooling water system, air blowing system, waste gas and wastewater discharge system, and tank area.

（1）Circulating cooling water system

equipment1: Pure water machine 1m³/One unit, one water storage tank, and one circulating pump.

The cooling water from the water storage tank is pumped into the water separator through a circulation pump, and then sent to the cooling water inlet of each cooler in each device for heat exchange inside the cooler; The cooling water at the outlet of the cooler enters the cooling water main pipeline after passing through the check valve, and is sent to the outdoor heat exchanger for cooling before returning to the water storage tank.

equipment2: Chiller unit

Device power:1.5kw， The pump head is 10m, the circulating water volume is 3 cubic meters per hour, and the temperature range is 5-room temperature.

（2）Air blowing system:

Equipment: Air compressor 1.5kW， air buffer tank.

（3）Exhaust gas and water discharge system:

Equipment: Axial flow fan 250mm， Motor 110W.

An exhaust hood is installed at the top of each device to draw exhaust gas into the exhaust manifold and discharge it outdoors, and the manifold is equipped with a windproof cap.

6) Anti corrosion measures for the device

（1) Process anti-corrosion measures

By adopting appropriate raw material ratios, process routes, and operating parameters, the conversion rate of acetic acid can be controlled and improved, the equipment and concentration of acetic acid flow in the system can be reduced, and the goal of avoiding and mitigating corrosion can be achieved.

（2）Equipment material anti-corrosion measures

Stainless steel is used according to different types of equipment (static equipment, dynamic equipment, valves, pipelines, sensors), material composition, usage environment, and functions316L、 Various corrosion-resistant materials and anti-corrosion measures such as glass, fluorine lining on the inner wall, and increased wall thickness.

（3) Equipment maintenance and anti-corrosion measures

The utility system of the device is equipped with a dedicated cleaning and blowing system (see utility configuration for details), which can clean, replace, and blow the device during long-term parking, regular maintenance, and daily upkeep, avoiding corrosive materials from coming into contact with the equipment for a long time during device shutdown and achieving anti-corrosion purposes.

7) Equipment safety, environmental protection, and health measures

（1) A tail gas exhaust manifold is installed in the public works of the device, which is discharged outdoors in accordance with relevant safety and environmental standards.

（2) Wastewater tanks are installed in the public works of the device, which can be used for hydrolysis operations

Used as raw material during production; The discharged water is discharged from the closed main pipe in the trench to the sewage collection well, avoiding contact between the discharged water and indoor air.

（3) The device is equipped with a circulating cooling water system (see utility configuration for details), which is beneficial for water conservation and consumption reduction.

（4) The device is equipped with toxic gas and flammable gas alarms, fire extinguishers, eye washers and other safety equipment, as well as acid resistant gloves, work shoes, safety helmets, goggles, gas masks and other specialized security, fire and labor protection supplies. Please refer to the device configuration list for details.

（5) Through the construction of HSE culture, the device is equipped with relevant warning signs, symbols, slogans, operating norms, and behavioral standards to create an HSE atmosphere, instill HSE concepts, and train HSE skills.

IIDevice Process Overview

Overview of Production Process

1.1 Overview of Production Process

Catalytic synthesis of ethyl acetate from raw materials acetic acid and ethanol at high temperature in a fixed bed reactor, followed by1^#Separate crude ethyl acetate from the distillation tower, and then pass it through2^#The refined product obtained by distillation tower is ethyl acetate.

The hydrolysis process of ethyl acetate involves the hydrolysis reaction of raw materials ethyl acetate and water in a fixed bed containing a catalyst, followed by1^#Distillation tower2^#Distillation tower is used to separate acetic acid and ethanol.

1.2Production process description:

1.2.1 Synthesis of ethyl acetate

1）In advance1^#Add a certain amount of acetic acid to the distillation tower, turn on the heater and temperature controller, and wait for the preheater, vaporizer1^#After the temperature of the distillation tower kettle and reactor has stabilized at the specified temperature, open them1^#Distillation tower kettle reflux pump, to make acetic acid flow at a certain rateLHSV along vaporizer, reactor, 1^#The distillation tower kettle is circulated. Then start the acetic acid pump and ethanol pump, add acetic acid and ethanol to the preheater in a certain molar ratio, mix the raw materials with the circulating kettle liquid in the preheater, enter the vaporizer, and then enter the reactor for reaction.

2）The mixture after the reaction contains acetic acid, ethyl acetate, water, and a small amount of ethanol1^#At the bottom of the distillation tower kettle, lower boiling point ethyl acetate, water, and a small amount of ethanol rise along the distillation tower and enter1^#The condenser at the top of the distillation tower enters after cooling1^#The top of the distillation tower is further cooled, and the cooled mixture enters1^#Separators, a portion of the organic phase in the upper part of the separator is passed through as reflux liquid1^#The reflux pump at the top of the distillation tower returns from the upper part of the tower1^#In the distillation tower; The other part is passed through2^#Inject the feed pump into the distillation tower2^#Refine in the distillation tower. Water phase in the lower part of the separator1^#The middle tank.

3）Crude ethyl acetate enters from the middle and upper part of the tower2^#Distillation tower, light components along2^#The distillation tower rises and passes through2^#After cooling the condenser at the top of the distillation tower, it enters2^#The organic phase in the upper part of the separator is all used as reflux liquid2^#The reflux pump at the top of the distillation tower returns from the upper part of the tower2^#In the distillation tower, the lower water phase of the separator is sent to the sewage treatment system. Ethyl acetate product, from2^#Extract from an appropriate position below the middle of the distillation tower, and pass through2^#After cooling the product condenser in the distillation tower, it enters the ethyl acetate product tank.

1.2.2 Hydrolysis of ethyl acetate

1）Ethyl acetate is fed into the hydrolysis feed pump through1^#After being heated by the hydrolysis feed heater, it enters the reactor containing the catalyst, and the raw water passes through2^#After the hydrolysis feed heater is heated, it enters the reactor, where ethyl acetate and water undergo hydrolysis reaction under the action of the catalyst, producing acetic acid and ethanol.

2）The mixture after the reaction contains acetic acid, ethanol, ethyl acetate, and water3^#In the distillation tower, ethyl acetate, water, and a small amount of ethanol with lower boiling points rise along the tower and enter3^#The condenser at the top of the distillation tower enters after cooling3^#Separators, a portion of the organic phase in the upper part of the separator is passed through as reflux liquid3^#The reflux pump at the top of the distillation tower returns from the upper part of the tower3^#In the distillation tower, the lower water phase of the separator is sent to the sewage treatment system.3^#The distillation tower kettle liquid is a mixture of acetic acid and ethanol, which enters the intermediate storage tank after passing through the reboiler.

3）The mixture of acetic acid and ethanol in the intermediate storage tank passes through4^#Introduction of feed pump for distillation tower4^#In the distillation tower, ethanol, as a light component, rises along the tower and passes through4^#After cooling the condenser at the top of the distillation tower, it enters4^#A separator, where a portion of the organic phase in the upper part of the separator is used as reflux liquid4^#The reflux pump at the top of the distillation tower returns from the upper part of the tower4^#In the distillation tower; The other part is stored as ethanol product in the ethanol product tank. The lower water phase of the separator is sent to the sewage treatment system.4^#The distillation tower kettle mainly contains acetic acid solution4^#After cooling the condenser of the distillation tower kettle, it enters the acetic acid product tank.