CN102836674B - Automatic filling method of catalyst - Google Patents

Abstract

The invention discloses a catalyst automatic filling method. The filling device includes two parts: a filling device and a control system. The method includes: firstly, obtaining relevant filling parameters through an experimental method, inputting them into the control system, and calculating the obtained parameters by the control system. It can output the required filling speed and drive the motor of the loader to work, and automatically correct the motor speed according to the filling situation to obtain the best filling effect. The catalyst automatic filling method is applicable to dense-phase filling of different reaction vessels and different types of catalysts, has high operability and precise control, can meet the needs of different filling environments, and can realize continuous, automatic and intelligent filling processes.

Description

Catalyst Autoloading Method

Technical field:

The invention relates to an automatic filling method for the catalyst dense-phase filling process of reaction equipment in the petrochemical industry.

Background technique:

The packing of granular materials, especially the packing of catalyst particles, has been paid more and more attention in its related fields. At present, the catalyst packing technology commonly used at home and abroad is a dense phase packing technology, which can maximize the performance of the catalyst in the reactor. Existing dense-phase filling equipment for granular materials generally includes a barrel, a distributor and its driving device. When working, the dense-phase filling device is installed on the top of the container (reactor or silo), and the distributor is driven by the driving device. Rotating around the shaft, the material enters the distributor through the barrel, and the material is evenly scattered by the distributor. The purpose is to scatter the granular materials into a number of concentric rings in the cylindrical silo or reactor and accumulate them layer by layer, so as to achieve the purpose of uniform loading as much as possible.

When the existing dense-phase filling device works, it refers to the actual situation of the filling site and determines an initial filling speed based on experience. After pre-filling for a period of time, stop the machine to check the filling effect, then adjust the speed to continue working, and then stop the machine after a period of time. effect, adjust the speed and continue to work, and so on. This not only affects the filling efficiency, but also affects the filling levelness and filling density. Therefore, it is necessary to realize the automation of the filling process, but due to the harsh environment of the filling site and the complicated filling process, it is difficult to realize intelligent and automated continuous filling.

Invention content:

The technical problem to be solved by the present invention is to propose an automatic filling method for catalyst dense-phase filling, which can make the filling process continuous, intelligent and automatic, reduce manual intervention in the filling process, and greatly improve the filling efficiency and filling effect.

The technical scheme adopted in the invention is: an automatic catalyst filling method, the filling device of which comprises two parts of a filling device and a control system. The filler is composed of a barrel, a driving motor, a transmission mechanism, and a distributor. The motor is installed on the top of the barrel, and the distributor is installed at the lower end of the barrel. The two are connected by a transmission mechanism, and the transmission mechanism is installed inside the barrel; the control system It at least includes a touch screen capable of inputting control commands and a controller that receives the control commands and is electrically connected with the motor. It is characterized in that the automatic filling method comprises the following steps in sequence:

-Take a number of catalyst samples to be loaded, and use the loader to carry out a filling experiment to determine the relationship between the opening of the flow regulating valve and the feeding speed, as well as the relationship between the speed of the distributor and the filling density;

- Determine the diameter of the distributor and the corresponding feeding speed according to the proposed packing density of the catalyst;

-Input the filling parameters to the control system through the touch screen, including the diameter of the dispenser, filling density, feeding speed, filling height, structural size of the reaction equipment, etc.;

-The controller of the control system calculates the initial speed required by the distributor and issues instructions to drive the motor to run;

- The controller of the control system automatically calculates the change in the height of the packed bed, and drives the motor to change the speed from time to time;

-After filling for a period of time, stop the machine for detection, find out the deviation between the actual filling situation and the expected value, and determine the correction coefficient;

- Input the correction coefficient through the touch screen to re-determine the speed;

- The filling device continues to run for automatic filling;

- Calculate the filling height, and when the preset value is reached, the device will stop and complete the entire filling.

The present invention has the following beneficial effects: the catalyst automatic filling method can be applied to dense-phase filling of different reaction vessels and different types of catalysts, has high operability, precise control, can meet the needs of different filling environments, and can realize the smoothness of the filling process. Continuous, automated, intelligent,

Detailed ways

With the popularization and application of the dense-phase packing method in the catalyst packing industry, more and more reaction equipment catalysts are required to adopt this dense-phase packing method. Due to the complexity of various reaction processes, a wide variety of catalysts, and various filling requirements, it is difficult to use all kinds of filling devices. Therefore, the present invention designs the following filling method. The filling device distributors are made into various series with different diameters, which are simply replaced according to different needs during application, and a set of automatic filling methods are formulated to meet different filling needs:

Preliminary preparation: First, obtain some catalyst samples to be loaded from the customer, conduct physical property analysis, and use the filling machine to conduct filling experiments to determine relevant filling parameters, such as the relationship between the opening of the flow regulating valve and the feeding speed, the speed of the distributor and the filling speed. The relationship between density, the relationship between filling height and filling radius, etc. Then, according to the customer's requirements such as filling density, determine the appropriate distributor, and at the same time determine the appropriate feeding speed. This work is done in the laboratory and then loaded on site.

On-site filling: install the loader on the top of the reaction vessel, connect the control system, and input the filling parameters through the touch screen, including the diameter of the distributor, filling density, feeding speed, filling height, structural size of the reaction equipment, etc.; the equipment runs automatically and determines the initial speed , and drive the distributor to start rotating, and at the same time, the material is conveyed into the barrel of the filler, and moves down to the distributor by gravity, and the material is thrown out by the rotating distributor. As the height of the material surface continues to increase, the control system automatically calculates the required speed of the distributor and drives the motor to automatically change the speed. After filling for a period of time, stop filling and conduct a ready-made inspection to find out the deviation between the actual filling effect and the expected value, determine the correction coefficient and input it into the system, and the control system will re-determine the motor speed and speed change rate according to the new program. As the material rises, the motor speed increases gradually. When the material level reaches the predetermined filling height, the equipment stops and the entire filling process is completed.

Data collation: After the filling is completed, check the entire filling effect, record the filling data, accumulate experience, make appropriate corrections to the relevant procedures, and continuously improve the filling system.

Claims (1)

1. a catalyst automatic filling method, its filling device comprises two parts of filler and control system, it is characterized in that described automatic filling method comprises the following steps successively: -Take a number of catalyst samples to be loaded, and use the loader to carry out a filling experiment to determine the relationship between the opening of the flow regulating valve and the feeding speed, as well as the relationship between the speed of the distributor and the filling density; - Determine the diameter of the distributor and the corresponding feeding speed according to the proposed packing density of the catalyst; -Input the filling parameters into the control system through the touch screen, including the diameter of the dispenser, filling density, feeding speed, filling height and structural size of the reaction equipment; -The controller of the control system calculates the initial speed required by the distributor and issues instructions to drive the motor to run; - The controller of the control system automatically calculates the change in the height of the packed bed, and drives the motor to change the speed in real time; -After filling for a period of time, stop the machine for detection, find out the deviation between the actual filling situation and the expected value, and determine the correction coefficient; - Input the correction coefficient through the touch screen to re-determine the speed; - The filling device continues to run for automatic filling; - Calculate the filling height, and when the preset value is reached, the device will stop and complete the entire filling.