WO2022040839A1

WO2022040839A1 - Hazardous gas reaction vessel

Info

Publication number: WO2022040839A1
Application number: PCT/CN2020/110696
Authority: WO
Inventors: 李恭辉
Original assignee: 南京溧水高新创业投资管理有限公司
Priority date: 2020-08-24
Filing date: 2020-08-24
Publication date: 2022-03-03

Abstract

A hazardous gas reaction vessel, comprising a reaction vessel body. The middle part of the reaction vessel body is fixed by a middle flange. A material outlet is provided at the lower end of the reaction vessel and connected to the external environment via a material outlet pipe. A liquid crystal display device, a leakage alarm sensor, and a temperature sensor are sequentially provided above the reaction vessel and connected to a power supply. A material inlet is connected to the upper half of the reaction vessel; moreover, the material inlet is provided with a sealing ring and a sealing cover. A stirring apparatus is provided in the middle of the upper part of the reaction vessel. The stirring apparatus is connected to an electric motor and a stirring blade via a stirring rod. A vacuum valve is provided on the reaction vessel body and is connected to a vacuuming pump via a vacuuming pipe. The reaction vessel is covered on all sides by a jacket. A jacket temperature sensor and a jacket pressure sensor are provided on the jacket. A PLN and a touchscreen connected to each other are mounted on the body of the reaction vessel. This allows the real-time monitoring of the temperature of the reaction vessel, a leakage alarm, a liquid surface display, real-time feedback, and risk aversion.

Description

A hazardous gas reactor

technical field

The application belongs to the technical field of reaction kettles, and in particular relates to a hazardous chemical gas reaction kettle.

Background technique

Reactor is a kind of reaction equipment, which is widely used in petroleum, chemical, rubber, pesticide, dye, medicine, food, and is used to complete the process of vulcanization, nitration, hydrogenation, alkylation, polymerization, condensation and other pressure vessels, such as reactors , reaction pot, decomposition pot, polymerization kettle, etc.; the materials are generally carbon-manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel, Inconel) alloys and other composite materials.

As a high temperature and high pressure equipment, the reaction kettle is prone to explosion and other dangers during use. There are many cases of reactor explosion accidents in my country. The following is an accident case in a chemical plant in my country: an explosion accident occurred in the chemical plant during the commissioning stage. The explosion caused the reactor cover to break and penetrated from the ceiling in the workshop. However, given that the explosion occurred at lunchtime, there were no casualties. Through investigation and evidence collection, the reason for the explosion of the reaction kettle is that there are a large number of suspended solids and pharmaceutical reagents in the chemical products. Under the strong acid state of the reaction kettle, the temperature of these organic compounds will rise. It produces chemical decomposition and enters the gas phase after evaporation, sulfur dioxide and alkyl compounds, both of which are flammable and explosive. If there are more than two gas-phase combustibles in the kettle, it will cause an explosion. In the process of production and operation, in the process of reactor packing, the order of packing, the amount of packing, the speed of packing, etc. may cause the reaction in the reactor to produce violent explosion. Especially the rapid heat generation, the rapid increase of explosive gas is the main factor for the explosion.

In addition, the material in the reaction kettle is not uniform during the feeding process, and the rapid reaction of local materials causes the temperature in the reaction kettle to rise rapidly, the material boils in a short time, and the violent reaction causes the material in the reaction kettle to gasify and the pressure rises rapidly . The occurrence of the explosion is related to the irregular operation of the operator. Correspondingly, during the unloading process, the phenomenon of local temperature rise is easy to occur.

When carrying out dangerous gas reactions, not only the above points should be kept in mind, but also the leakage of dangerous gases should be paid attention to.

Application content

In order to solve the problems existing in the above background technology, a hazardous gas reaction kettle is provided, which can monitor the temperature, leakage warning and liquid level display of the reaction kettle in real time, and provide feedback in time to avoid risks.

This application is implemented as follows:

A hazardous chemical gas reaction kettle, comprising a reaction kettle body; the middle part of the reaction kettle body is fixed by an intermediate flange, and a discharge port is arranged at the lower end of the reaction kettle; it is connected with the outside world through a discharge pipeline; the upper part of the reaction kettle is provided with a sensor module , the sensor module includes a liquid level display device, a leakage warning sensor and a temperature sensor; the liquid level display device, the leakage warning sensor and the kettle body temperature sensor are sequentially arranged on the upper part of the reactor and connected to the power supply, and the feed port is connected to the reactor of the reactor. The upper part, and the feeding port is provided with a sealing ring and a sealing cover; a stirring device is arranged in the middle of the upper part of the reaction kettle, and the stirring device is connected to the motor and the stirring blade through a stirring rod. The vacuum valve port is arranged on the reactor body, and is connected with the vacuum pump through a vacuum pipeline. The reactor is covered with a jacket around it, and a jacket temperature sensor and a jacket pressure sensor are arranged on the jacket. Installed with interconnected PLC and touch screen.

Further, an electric heating rod is arranged inside the jacket.

Further, the explosion-proof valve arranged on the top of the reactor body can be integrated with the manhole.

Further, the discharge port, the vacuum valve port and the feed port are all provided with sealing valves.

Further, the reactor body is a cylindrical tank body.

Further, the external pipes connected with the reactor body can be disassembled.

Further, the reactor body has multiple layers, including an inner layer, a middle layer and an outer layer, a hollow layer is formed between the inner layer and the middle layer, and a thermal insulation layer is arranged between the middle layer and the outer layer.

Further, the material of the reactor body is 316L stainless steel.

Further, the jacket is wrapped around the periphery of the lower half of the reactor body.

Further, the discharge port is provided with a dangerous gas concentration sensor.

The beneficial effects brought by this application are:

1. The device has a simple structure, and through the setting of multiple sensors, it can give timely feedback to the reaction situation in the reactor, help the staff to monitor in real time, and prevent the occurrence of dangerous situations.

2. This set of equipment has strong reliability, fast processing speed and strong safety. The control scheme is flexible, the working pressure and temperature of the reactor can be changed according to the actual situation, the control progress is high, and the performance is stable.

Description of drawings

Fig. 1 is the structural representation of this application;

Among them, 1-reactor body; 2-sensor module; 21-liquid level display device; 22-leakage warning sensor; 23-temperature sensor; 24-vacuum valve port; 241-vacuum pipeline; 25-feed port; 251 - sealing ring; 252- sealing cover; 26- motor; 27- intermediate flange; 28- vacuum pump; 3- jacket; 31- left jacket; 32- right jacket; 33- jacket temperature sensor; 34- clip Set of pressure sensor; 4-discharge port; 41-dangerous gas concentration sensor; 5-stirring rod; 6-PLC; 7-touch screen.

detailed description

The present application will be further described below with reference to the accompanying drawings. The following examples are only used to more clearly illustrate the technical solutions of the present application, and cannot be used to limit the protection scope of the present application.

A hazardous chemical gas reaction kettle, which is characterized in that it includes a reaction kettle body 1; the middle part of the reaction kettle body 1 is fixed by an intermediate flange 27, and the discharge port 4 is arranged at the lower end of the reaction kettle; connection; the upper part of the reaction kettle is provided with a sensor module 2, the sensor module 2 includes a liquid level display device 21, a leakage warning sensor 22 and a temperature sensor; the liquid level display device 21, the leakage warning sensor 22 and the kettle body temperature sensor 23 are sequentially arranged in the reactor The upper part of the kettle is connected to the power supply, the feeding port 25 is connected to the upper half of the reaction kettle, and the feeding port 25 is provided with a sealing ring 251 and a sealing cover 252; a stirring device is arranged in the middle of the upper part of the reactor, and the stirring device passes through the stirring rod. 5 Connect the motor 26 and the stirring blade. The vacuum valve port 24 is arranged on the reactor body 1, and is connected with the vacuum pump 28 through the vacuum pipeline 241. The reactor is surrounded by a jacket, and the jacket is provided with a jacket temperature sensor 33 and a jacket pressure sensor 34, so The main body of the reaction kettle is equipped with a PLC6 and a touch screen 7 which are connected to each other. An electric heating rod is arranged inside the jacket. The explosion-proof valve arranged at the top of the reactor body 1 can be integrated with the manhole. The discharge port 4, the vacuum valve port 24 and the feed port 25 are all provided with sealing valves. The reactor body is a cylindrical tank. The external pipes connected to the reactor body 1 can be disassembled. The reactor body 1 has multiple layers, including an inner layer, a middle layer and an outer layer, a hollow layer is formed between the inner layer and the middle layer, and a thermal insulation layer is arranged between the middle layer and the outer layer. The material of the reactor body 1 is 316L stainless steel. The jacket is wrapped around the periphery of the lower half of the reactor body 1 . A dangerous gas concentration sensor 41 is arranged on the discharge port 4 .

First, the intermediate flange 27 is tightened, and the power supply is turned on; the vacuum valve port 24 is connected with the vacuum pipeline 241, and the vacuum pump 28 is opened, the vacuum valve port 24 is opened, and the vacuum pump 28 is started to extract the air in the reactor body 1 to form a vacuum; Close the air-sealing valve port, and open the feed port 25, so that the reaction material is quickly poured into the reactor body 1 according to the negative pressure difference formed in the reactor body 1 and the effect of gravity. The liquid level displayed by the level detection and display device can be used to know the amount of reactants in the tank. When the empty reactant reaches the required amount, stop feeding. After receiving the materials, close the sealing valve of the feeding port 25 and disconnect the vacuum valve port 24. , the reactants are enclosed in the reactor body 1. Turn on the motor 26 to drive the stirring rod 5 to accelerate the reaction. During the reaction process, the temperature and leakage in the kettle should be detected through the temperature detection and display device and the leakage warning device.

In the present application, the signals of pressure and temperature sensors are used, and the temperature and pressure inside the reactor body 11 can be maintained to change according to appropriate values through PID operation. An electric heater is provided in the jacket 3, and the safety of the temperature increase in the reactor can be maintained.

The pressure sensor of the reactor body 1 sends the pressure value to the PLC6 for simulation. After PID operation, the current output signal is adjusted to control the pressure regulation inside the reactor body 11; through the touch screen 7, the staff and the internal pressure settings can be communicated . The staff can preset the PID operation control parameters before the reactor works, so as to control the pressure change in the reactor.

After the jacket temperature sensor 3334 transmits the temperature signal to the input module, it also undergoes PID operation to control the average power of the electric heating rod and the temperature of the electric heating rod through the output voltage signal, thereby controlling the temperature inside the reactor body 11. control. Through the touch screen 7, the staff and the setting of the internal pressure can be communicated. The staff can preset the PID operation control parameters before the reactor works, so as to control the temperature change in the reactor.

When the reaction kettle body 11 is reacting, if a gas leak occurs, if the leak point is located in the upper part of the reaction kettle, the leakage warning sensor 22 located at the upper part of the reaction kettle will send the signal to the PLC6, and the collected gas concentration and the staff are on the touch screen. The preset gas concentration on 7 is compared, and if the collected signal concentration is higher than the set concentration, an alarm will be issued, allowing the staff to respond in time to ensure the safety of the experiment. If the leak point is located in the lower half of the reactor, the dangerous gas concentration sensor 41 will respond in time, send the signal to the PLC 6, and compare the collected gas concentration with the gas concentration preset by the staff on the touch screen 7. If If the collected signal concentration is higher than the set concentration, an alarm will be issued, allowing the staff to respond in time to ensure the safety of the experiment.

Compared with the prior art, the hazardous gas reaction kettle of the present application has the characteristics of high reliability, fast processing speed, strong safety, and personalized customized control scheme, etc., and can be widely used in the hazardous gas reaction process. The glass-lined treatment of the sensors and the interior of the reactor can also be used for the production of corrosive gases and liquids, and can be extended to other environments, such as the production process of strong corrosive media. Through the touch screen 7 during use, the operator and the reactor can have direct feedback, which saves a lot of training and learning costs. Operators only need simple training and can be used on the job. The operator sets the pressure and temperature in the reactor through the touch screen 7, and monitors them in real time, and can change the working pressure and temperature in the reactor in real time according to the actual situation, and adjust the changing curve. On the one hand, the accuracy of the reaction is significantly improved, and on the other hand, the safety of the working environment can be guaranteed. If the temperature and pressure in the reaction kettle change abnormally, or the dangerous gas leaks, the operator can detect it in time, respond in time, and reduce the probability of danger.

It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation are intended to encompass non-exclusive inclusion such that a process, method, article or device that includes a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus.

The above are only the preferred embodiments of the present application. It should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, several improvements and modifications can also be made. These improvements and modifications It should also be regarded as the protection scope of this application.

Claims

A hazardous chemical gas reaction kettle, characterized in that it comprises a reaction kettle body (1); the middle part of the reaction kettle body (1) is fixed by an intermediate flange (27), and a discharge port (4) is arranged at the lower end of the reaction kettle, connected with the outside world through a discharge pipeline; a sensor module is arranged on the upper part of the reactor, and the sensor module includes a liquid level display device (21), a leakage warning sensor (22) and a temperature sensor; a liquid level display device (21), a leakage warning device The sensor (22) and the temperature sensor (23) of the kettle body are arranged on the upper part of the reaction kettle in turn, and are connected with the power supply, the feeding port (25) is connected to the upper half of the reaction kettle, and the feeding port (25) is provided with a sealing ring (251). ) and a sealing cover (252); a stirring device is arranged in the middle of the upper part of the reaction kettle, and the stirring device is connected to the motor (26) and the stirring blade through the stirring rod (5). The vacuum valve port (24) is arranged on the reactor body (1), and is connected to the vacuum pump (28) through a vacuum pipeline (241), and a jacket (3) is covered around the reactor, and the jacket (3) is provided with A jacket temperature sensor (33) and a jacket pressure sensor (34) are provided, and a PLC (6) and a touch screen (7) connected to each other are installed on the main body of the reaction kettle.
The hazardous chemical gas reactor according to claim 1, characterized in that, an electric heating rod is arranged inside the jacket (3).
A hazardous gas reaction kettle according to claim 1, characterized in that the explosion-proof valve arranged on the top of the reaction kettle body (1) can be integrated with the manhole.
A hazardous chemical gas reaction kettle according to claim 1, characterized in that, the discharge port (4), the vacuum valve port (24), and the feed port (25) are all provided with sealing valves.
The hazardous chemical gas reactor according to claim 1, characterized in that, the reactor body (1) is a cylindrical tank.
The hazardous chemical gas reactor according to claim 1, characterized in that the external pipeline connected to the reactor body (1) can be disassembled.
The hazardous chemical gas reactor according to any one of claims 1-5, wherein the reactor body (1) has multiple layers, including an inner layer, a middle layer and an outer layer, and the inner layer and all the A hollow layer is formed between the middle layers, and a thermal insulation layer is arranged between the middle layer and the outer layer.
The hazardous chemical gas reactor according to any one of claims 1-5, characterized in that, the material of the reactor body (1) is 316L stainless steel.
The hazardous chemical gas reactor according to any one of claims 1-5, characterized in that, the jacket (3) is wrapped around the periphery of the lower half of the reactor body (1).
The hazardous gas reaction kettle according to any one of claims 1-5, characterized in that a hazardous gas concentration sensor (41) is arranged on the discharge port (4). .