Advanced control system for flow of carbon black additive

Abstract

The utility model relates to the technical field of carbon black production, and discloses a carbon black additive flow advanced control system, which is characterized in that a raw oil pipeline is connected onto a raw oil tank, an additive pipeline is connected onto an additive tank, and a raw oil pump and an additive variable frequency pump are respectively mounted on the raw oil pipeline and the additive pipeline; the raw oil pipeline and the additive pipeline are converged and connected with the carbon black reaction furnace through a main pipe, a raw oil flowmeter and a raw oil flow regulating valve are mounted on the raw oil pipeline, and a flow transmitter and a raw oil flow regulator are electrically connected between the raw oil flowmeter and the raw oil flow regulating valve; an additive flow meter is mounted on the additive pipeline; a rotating speed regulator and an additive flow regulator are electrically connected between the additive flow meter and the additive variable-frequency pump; and a ratio regulator is electrically connected between the raw oil flow regulator and the additive flow regulator. According to the system, detection is timely, synchronous adjustment is achieved, the phenomenon that adjustment of the oil absorption value lags behind is avoided, defective products are reduced, and the production cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon black production, in particular to a carbon black additive flow advance control system. Background Art

[0002] In the field of carbon black production, the raw materials for carbon black production are aromatic oils such as coal tar, anthracene oil, and ethylene tar. The reaction process uses raw oil to be sprayed into a high-temperature reactor through multiple oil gun nozzles for cracking. The production process includes reaction, collection, crushing, granulation, drying, storage, and packaging. The entire production process uses a DCS system for remote operation and control. The reaction process uses an additive containing potassium ions. The potassium ions in the additive can effectively inhibit the formation of carbon black structure, thereby affecting the oil absorption value index in the carbon black product. However, the determination of carbon black oil absorption value is in the drying process. It takes 2 hours from the reaction process to the drying process. When the oil absorption value is found to be unqualified through detection means, it has caused the production of unqualified products for at least 2 hours. Therefore, when the raw oil flow or additive flow in the reaction process is abnormal, it cannot be adjusted in time, resulting in unqualified carbon black products and a large number of defective products, which invisibly increases production and operation costs. Summary of the Invention

[0003] In order to solve the problem that in the current carbon black product production process, the carbon black oil absorption value determination process is carried out later, and the abnormal raw oil flow or additive flow in the reaction process cannot be detected in time, which leads to the production of a large number of unqualified products. The utility model provides a carbon black additive flow advance control system.

[0004] The utility model is implemented by the following technical solutions:

[0005] A carbon black additive flow advance control system comprises a raw oil tank and an additive tank, wherein the raw oil tank is connected to a raw oil pipeline, the additive tank is connected to an additive pipeline, the raw oil pipeline and the additive pipeline are respectively installed with a raw oil pump and an additive frequency conversion pump, the raw oil pipeline and the additive pipeline are merged and connected to a carbon black reactor through a main pipe, a raw oil flow meter and a raw oil flow regulating valve are installed on the raw oil pipeline, a flow transmitter and a raw oil flow regulator are electrically connected between the raw oil flow meter and the raw oil flow regulating valve; an additive flow meter is installed on the additive pipeline, a speed regulator and an additive flow regulator are electrically connected between the additive flow meter and the additive frequency conversion pump; and a ratio regulator is electrically connected between the raw oil flow regulator and the additive flow regulator.

[0006] During implementation, it includes a raw oil tank and an additive tank. The raw oil tank is connected to a raw oil pipeline, and the additive tank is connected to an additive pipeline. The raw oil pipeline and the additive pipeline are respectively installed with a raw oil pump and an additive variable frequency pump. The raw oil pipeline and the additive pipeline are merged and connected to the carbon black reactor through a main pipe.

[0007] The crude oil closed-loop control system includes a crude oil flow meter, a crude oil flow regulating valve, a crude oil flow regulator, and a flow transmitter; the crude oil flow meter and the crude oil flow regulating valve are installed on the crude oil pipeline, and the flow transmitter and the crude oil flow regulator are electrically connected between the crude oil flow meter and the crude oil flow regulating valve; specifically, the signal of the crude oil flow meter is connected to the input end of the crude oil flow regulator through the flow transmitter, and the signal output end of the crude oil flow regulator is connected to the crude oil flow regulating valve, forming a single-loop control to automatically control the flow of crude oil entering the furnace.

[0008] The additive closed-loop control system includes an additive variable frequency pump, an additive flow meter, a speed regulator, and an additive flow regulator; an additive flow meter is installed on the additive pipeline, and the speed regulator and the additive flow regulator are electrically connected between the additive flow meter and the additive variable frequency pump; specifically, the signal of the crude oil flow meter is connected to the input end of the crude oil flow regulator through a flow transmitter, and the signal output end of the crude oil flow regulator is connected to the crude oil flow regulating valve, forming a single-loop control to automatically control the additive flow.

[0009] The intermediate connection control system includes a ratio regulator and a weight regulator; the ratio regulator is electrically connected between the raw oil flow regulator and the additive flow regulator; the additive flow rate is automatically adjusted as the raw oil flow rate fluctuates; when the potassium ion content of the products is the same, the ratio regulator is set to a fixed value; the ratio regulator is controlled by the weight regulator on the additive tank and is suitable for various models of products containing different potassium ion concentrations.

[0010] When in use, the operator inputs the actual additive preparation weight into the weight regulator and adjusts the setting parameters of the ratio regulator. Under normal circumstances, the ratio regulator is set to a fixed value.

[0011] When the crude oil flow rate increases or decreases, the crude oil flow meter collects the flow signal and feeds it back to the crude oil regulator through the flow transmitter. The crude oil regulator outputs the increase or decrease and feeds it back to the crude oil flow control valve to adjust the flow in the crude oil pipeline to achieve closed-loop control;

[0012] When the additive flow in the additive pipeline fluctuates, the output signal of the raw oil regulator and the flow signal collected by the additive flow meter are used as the input of the additive flow regulator through the ratio regulator to control the proportional operation of the additive variable frequency pump, adjust the additive flow in the additive pipeline, and adjust the additive addition amount in advance, thereby adjusting the oil absorption value of the carbon black product to avoid the occurrence of unqualified oil absorption value.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] The utility model provides a carbon black additive flow advance control system, which changes the previous method of adjusting the additive flow based on the oil absorption value detection result, and adopts cascade control of the raw oil process flow and the additive flow. The additive flow is automatically adjusted as the raw oil flow changes. The detection is timely, the results are accurate, and the adjustment is synchronized, which avoids the phenomenon of lagging oil absorption value adjustment, greatly reduces the production of defective products, saves production costs, and improves economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram showing the overall structure of the present invention.

[0016] In the figure: 1-raw oil tank, 11-raw oil pipeline, 101-raw oil pump, 102-raw oil flow meter, 103-raw oil flow regulating valve, 104-raw oil flow regulator, 105-flow transmitter;

[0017] 2-additive tank, 22-additive pipeline, 201-additive variable frequency pump, 202-additive flow meter, 203-speed regulator, 204-additive flow regulator;

[0018] 205-ratio regulator, 206-weight regulator. DETAILED DESCRIPTION

[0019] The specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0020] A carbon black additive flow advance control system, such as Figure 1 As shown: it includes a raw oil tank 1 and an additive tank 2, the raw oil tank 1 is connected to a raw oil pipeline 11, the additive tank 2 is connected to an additive pipeline 22, the raw oil pipeline 11 and the additive pipeline 22 are respectively installed with a raw oil pump 101 and an additive frequency conversion pump 201, the raw oil pipeline 11 and the additive pipeline 22 are merged and connected to the carbon black reactor 3 through a main pipe.

[0021] The crude oil closed-loop control system includes a crude oil flow meter 102, a crude oil flow regulating valve 103, a crude oil flow regulator 104, and a flow transmitter 105; the crude oil flow meter 102 and the crude oil flow regulating valve 103 are installed on the crude oil pipeline 11, and the flow transmitter 105 and the crude oil flow regulator 104 are electrically connected between the crude oil flow meter 102 and the crude oil flow regulating valve 103; specifically, the signal of the crude oil flow meter 102 is connected to the input end of the crude oil flow regulator 104 through the flow transmitter 105, and the signal output end of the crude oil flow regulator 104 is connected to the crude oil flow regulating valve 103, forming a single-loop control to automatically control the flow of crude oil entering the furnace.

[0022] The additive closed-loop control system includes an additive variable frequency pump 201, an additive flow meter 202, a speed regulator 203, and an additive flow regulator 204; the additive flow meter 202 is installed on the additive pipeline 22, and the speed regulator 203 and the additive flow regulator 204 are electrically connected between the additive flow meter 202 and the additive variable frequency pump 201; specifically, the signal of the crude oil flow meter 102 is connected to the input end of the crude oil flow regulator 104 through the flow transmitter 105, and the signal output end of the crude oil flow regulator 104 is connected to the crude oil flow control valve 103, forming a single-loop control to automatically control the additive flow.

[0023] The intermediate connection control system includes a ratio regulator 205 and a weight regulator 206; the ratio regulator 205 is electrically connected between the raw oil flow regulator 104 and the additive flow regulator 204; the additive flow rate is automatically adjusted as the raw oil flow rate fluctuates; when the potassium ion content of the product is the same, the ratio regulator 205 is set to a fixed value; the ratio regulator 205 is controlled by the weight regulator 206 on the additive tank 2, and is suitable for various models of products containing different potassium ion concentrations.

[0024] When in use, the operator inputs the actual additive preparation weight into the weight regulator 206 and adjusts the setting parameters of the ratio regulator 205. Under normal circumstances, the ratio regulator 205 is set to a fixed value;

[0025] When the crude oil flow rate increases or decreases, the crude oil flow meter collects the flow signal and feeds it back to the crude oil regulator 104 through the flow transmitter 105. The crude oil regulator 104 outputs the increase or decrease feedback to the crude oil flow control valve 103, which adjusts the flow in the crude oil pipeline 11 to achieve closed-loop control;

[0026] When the flow of additive in the additive pipeline 22 fluctuates, the output signal of the raw oil regulator 104 and the flow signal collected by the additive flow meter 202 are calculated by the ratio regulator 205 as the input of the additive flow regulator 204 to control the proportional operation of the additive variable frequency pump 201, adjust the flow of additive in the additive pipeline 22, adjust the amount of additive added in advance, and then adjust the oil absorption value of the carbon black product, thereby avoiding the occurrence of unqualified oil absorption value.

[0027] The scope of protection claimed by the present invention is not limited to the above specific embodiments. For those skilled in the art, the present invention may have various deformations and changes. Any modifications, improvements and equivalent substitutions made within the concept and principle of the present invention should be included in the scope of protection of the present invention.

Claims

1. A carbon black additive flow advance control system, comprising a raw oil tank (1) and an additive tank (2), wherein the raw oil tank (1) is connected to a raw oil pipeline (11), and the additive tank (2) is connected to an additive pipeline (22), wherein a raw oil pump (101) and an additive variable frequency pump (201) are respectively installed on the raw oil pipeline (11) and the additive pipeline (22), and the raw oil pipeline (11) and the additive pipeline (22) are connected to a carbon black reactor (3) through a main pipe at the junction thereof, characterized in that: A raw oil flow meter (102) and a raw oil flow regulating valve (103) are installed on the raw oil pipeline (11), and a flow transmitter (105) and a raw oil flow regulator (104) are electrically connected between the raw oil flow meter (102) and the raw oil flow regulating valve (103); An additive flow meter (202) is installed on the additive pipeline (22), and a speed regulator (203) and an additive flow regulator (204) are electrically connected between the additive flow meter (202) and the additive variable frequency pump (201); A ratio regulator (205) is electrically connected between the raw oil flow regulator (104) and the additive flow regulator (204).

2. A carbon black additive flow advance control system according to claim 1, characterized in that: The ratio regulator (205) is controlled by a weight regulator (206) on the additive tank (2).

3. A carbon black additive flow advance control system according to claim 1, characterized in that: The signal of the crude oil flow meter (102) is connected to the input end of the crude oil flow regulator (104) through the flow transmitter (105), and the signal output end of the crude oil flow regulator (104) is connected to the crude oil flow regulating valve (103).

4. A carbon black additive flow advance control system according to claim 1, characterized in that: The signal of the additive flow meter (202) is connected to the input ends of the additive flow regulator (204) and the speed regulator (203), and the signal output ends of the additive flow regulator (204) and the speed regulator (203) are connected to the additive variable frequency pump (201).

Images