Catalyst extraction control system of chemical device
Patent Information
- Application Number
- CN202422891900.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-26
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-11-26
AI Technical Summary
In the prior art, the concentration of catalysts in chemical production is too high due to continuous addition, resulting in deposition and blocking production pipelines, affecting the production system, and stopping the production catalyst will cause time and economic losses, which poses safety risks.
The combination of time sequence control and pressure control is adopted to achieve continuous production and production of catalysts through the electrical connection between the catalyst production valve, nitrogen control valve and pressure detection sensor and the controller, and avoid system blockage and parking.
The continuous production of catalysts is achieved, the continuous production is ensured, and the system parking and congestion caused by catalyst deposition are avoided, thus reducing safety risks and economic losses.
Smart Images
Figure CN223282914U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of chemical production auxiliary equipment, in particular to a catalyst extraction control system for a chemical plant. Background Art
[0002] Currently, in the field of petrochemical production, in order to improve catalytic efficiency, the catalytic reaction is often carried out by continuously adding catalyst. Since the catalyst will be partially deactivated as the reaction continues, catalyst addition is required. The continuous addition of catalyst will cause the catalyst concentration to be too high. When it exceeds the limit that the solvent can carry, the catalyst will deposit. The deposited catalyst will clog the production pipeline, further affecting the entire production system, so the catalyst needs to be continuously extracted. If the production is stopped to extract the catalyst, it will cause loss of production time and economic losses, and will also create corresponding safety risks. Therefore, a catalyst extraction control system that can continuously extract catalysts without interrupting continuous production is needed. Summary of the Invention
[0003] The technical problem to be solved by the utility model is to provide a catalyst extraction control system for a chemical plant, which realizes the extraction of catalyst from a non-stop production device through time control, sequence control and pressure control of corresponding valves.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is:
[0005] A catalyst extraction control system for a chemical plant includes a catalyst extraction valve connected to a catalyst discharge port of a production system. The catalyst extraction valve is connected to a catalyst extraction tank via a pipeline. A catalyst discharge pipe is provided at the bottom of the catalyst extraction tank. The top of the catalyst extraction tank is connected to a nitrogen buffer tank via a nitrogen discharge pipe. A nitrogen control valve is provided on the nitrogen discharge pipe.
[0006] Preferably, a catalyst discharge valve is provided on the catalyst discharge pipe.
[0007] Preferably, a pressure detection sensor is provided on the top of the catalyst extraction tank.
[0008] Preferably, the catalyst extraction valve, the nitrogen control valve and the catalyst discharge valve are all electromagnetic on-off valves.
[0009] Preferably, the catalyst extraction valve, the nitrogen control valve, the catalyst discharge valve and the pressure detection sensor are electrically connected to the controller.
[0010] The utility model can achieve the following beneficial effects:
[0011] The utility model can continuously extract the catalyst in the production system without stopping the production device through the output of sequential control and pressure control, thereby realizing continuous production in the production link, avoiding system shutdown caused by catalyst failure, and avoiding production system blockage caused by excessive catalyst, which in turn causes system shutdown. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments:
[0013] Figure 1 This is the system structure diagram of the utility model.
[0014] In the figure: production system catalyst unloading port 1, catalyst extraction valve 2, catalyst extraction tank 3, nitrogen buffer tank 4, nitrogen control valve 5, catalyst discharge valve 6, pressure detection sensor 7. DETAILED DESCRIPTION
[0015] The preferred solution is Figure 1 As shown, a catalyst extraction control system for a chemical plant includes a catalyst extraction valve 2 connected to a catalyst discharge port 1 of a production system. The catalyst extraction valve 2 is connected to a catalyst extraction tank 3 via a pipeline. A catalyst discharge pipe is provided at the bottom of the catalyst extraction tank 3. The top of the catalyst extraction tank 3 is connected to a nitrogen buffer tank 4 via a nitrogen discharge pipe. A nitrogen control valve 5 is provided on the nitrogen discharge pipe. A catalyst discharge valve 6 is provided on the catalyst discharge pipe. A pressure sensor 7 is provided on the top of the catalyst extraction tank 3. The catalyst extraction valve 2, nitrogen control valve 5, and catalyst discharge valve 6 are all electromagnetic on / off valves. The catalyst extraction valve 2, nitrogen control valve 5, catalyst discharge valve 6, and pressure sensor 7 are electrically connected to a controller.
[0016] The controller is a DCS system, which is equipped with a time sequence control. When the time is reached, the catalyst extraction valve 2 is opened, and the suspension containing the catalyst enters the catalyst extraction tank; when the extraction time is reached, the catalyst extraction valve 2 is closed and the catalyst discharge valve is opened. When the pressure of the pressure detection sensor 7 reaches the limit, the catalyst extraction valve 2 is opened. When the pressure at the pressure detection point drops to the limit, the catalyst discharge valve 6 and the nitrogen control valve 5 are closed at the same time; when the above two valves are closed, the timing is started, and when the time reaches the limit, the next extraction control cycle is entered.
[0017] The control method of the utility model requires a combination of time sequence control and pressure control to realize the extraction of the catalyst.
[0018] The control method of the present invention requires the use of time sequence control to open the catalyst extraction valve 2.
[0019] The control method of the utility model needs to use the pressure limit detected by the pressure detection sensor 7 to set the opening of the nitrogen control valve 5:
[0020] The control method of the utility model needs to use the pressure limit value detected by the pressure detection sensor 7 to set the management and close the catalyst extraction valve 2 and the catalyst discharge valve 6 at the same time.
[0021] The control method of the present invention needs to utilize time sequence control to set up and start the next cycle of the above steps.
[0022] Example 1:
[0023] like Figure 1 As shown, a catalyst extraction control system for a chemical plant is started when the catalyst of the production system needs to be extracted; a time sequence is set on the DCS system, and when the time is reached, the catalyst extraction valve 2 is opened, and the suspension containing the catalyst enters the catalyst extraction tank; when the extraction time is reached, the catalyst extraction valve 2 is closed and the catalyst discharge valve is opened; when the pressure of the pressure detection sensor 7 reaches the limit, the catalyst extraction valve 2 is opened; when the pressure at the pressure detection point drops to the limit, the catalyst discharge valve 6 and the nitrogen control valve 5 are closed at the same time; when the above two valves are closed, the timer is started, and when the time reaches the limit, the next extraction control cycle is entered.
[0024] Working principle:
[0025] When the catalyst needs to be extracted, start the catalyst extraction control program in the control system or set a timer in the system to start for 2 hours;
[0026] When the catalyst withdrawal control program is started, the catalyst withdrawal valve opens.
[0027] In a preferred solution, the catalyst withdrawal valve reaches a time of 2 minutes and is closed.
[0028] In a preferred embodiment, the catalyst extraction valve is closed while the catalyst discharge valve is opened.
[0029] In a preferred embodiment, when the pressure detected is less than 0.2 MPa, the nitrogen control valve is opened and the catalyst extraction valve is closed at the same time.
[0030] In the priority solution, when the pressure detection is less than 0.42MPa, close the nitrogen control valve.
[0031] In a preferred embodiment, when the nitrogen control valve is closed, the catalyst discharge valve is opened at the same time, and the next program cycle is entered.
[0032] The working principle of the present utility model is a catalyst extraction control method for a chemical plant. When the catalyst of the production system needs to be extracted or the program sets a timer, the catalyst extraction control program is started; a time sequence is set on the DCS system, and when the time is reached, the catalyst extraction valve 2 is opened, and the suspension containing the catalyst enters the catalyst extraction tank; when the extraction time is reached, the catalyst extraction valve 2 is closed and the catalyst discharge valve is opened; when the pressure of the pressure detection sensor 7 reaches the limit, the catalyst extraction valve 2 is opened; when the pressure at the pressure detection point drops to the limit, the catalyst discharge valve 6 and the nitrogen control valve 5 are closed at the same time; when the above two valves are closed, the timing is started, and when the time reaches the limit, the next extraction control cycle is entered. The control logic is shown in Table 1.
[0033] Table 1 Control logic table
[0034] step Control conditions Catalyst extraction valve (2) Nitrogen control valve (5) Catalyst drain valve (6) first step Time limit open close close Step 2 Time limit close close open Step 3 Pressure limit close open open Step 4 Pressure limit close close close
[0035] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.
Claims
1. A catalyst extraction control system for a chemical plant, characterized by: The catalyst extraction valve (2) is connected to a catalyst discharge port (1) of a production system. The catalyst extraction valve (2) is connected to a catalyst extraction tank (3) through a pipeline. A catalyst discharge pipe is provided at the bottom of the catalyst extraction tank (3). The top of the catalyst extraction tank (3) is connected to a nitrogen buffer tank (4) through a nitrogen discharge pipe. A nitrogen control valve (5) is provided on the nitrogen discharge pipe.
2. A catalyst extraction control system for a chemical plant according to claim 1, characterized in that: A catalyst discharge valve (6) is provided on the catalyst discharge pipe.
3. A catalyst extraction control system for a chemical plant according to claim 2, characterized in that: A pressure detection sensor (7) is provided on the top of the catalyst extraction tank (3).
4. A catalyst extraction control system for a chemical plant according to claim 3, characterized in that: The catalyst extraction valve (2), the nitrogen control valve (5) and the catalyst discharge valve (6) are all electromagnetic on / off valves.
5. A catalyst extraction control system for a chemical plant according to claim 4, characterized in that: The catalyst extraction valve (2), the nitrogen control valve (5), the catalyst discharge valve (6) and the pressure detection sensor (7) are electrically connected to the controller.