Loop reactor feeding device

Abstract

The utility model discloses a feeding device of a loop reactor, and belongs to the technical field of asphalt feeding. Comprising a tank body, a raw material inlet and a nitrogen inlet are formed in the top of the tank body, a bottom outlet is formed in the bottom of the tank body, and a heater is arranged outside the tank body; the raw material inlet is connected with a raw material inlet line; the nitrogen inlet is connected with a nitrogen line; the bottom outlet is connected with an inlet of a bottom outlet line, and a pump and a pump circulation line are arranged on the bottom outlet line; an outlet of the bottom outlet line is connected with an inlet of a return line, and an outlet of the return line is connected with the raw material inlet line. Through heating of the raw material tank and high-position feeding of the pump, the kinematic viscosity of the materials is reduced, the flowing performance is improved, the kinematic resistance is reduced, and high-viscosity material feeding is efficiently achieved; the problem of material layering is effectively solved through a reflux process; and through nitrogen sealing, the safety risk in the feeding process is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of asphalt feeding and relates to a feeding device for a loop tube reactor. Background Art

[0002] The raw materials of mesophase asphalt and general-purpose asphalt include petroleum asphalt, coal tar asphalt, catalytic oil slurry, residual oil, etc. There are two main ways to feed asphalt: "upper feeding" and "lower feeding". "Upper feeding" is feeding from the top nozzle of the storage tank, while "lower feeding" is feeding from the bottom nozzle of the storage tank. However, from a safety perspective, liquid asphalt adopts the conventional "upper feeding" feeding method. Since the temperature of liquid asphalt is generally above 90°C, a large amount of flammable and explosive light component gas will escape when it falls from a high altitude, and liquid asphalt falling rapidly from a high altitude is prone to static electricity, which poses a great safety hazard. More importantly, the raw materials used for mesophase asphalt and general-purpose asphalt are often very viscous, and even need to be heated before they can enter the reactor normally for reaction, and the materials inside the storage tank are prone to stratification problems.

[0003] In order to solve the problem of feeding high-viscosity and high-temperature materials, the utility model provides a feeding device for a ring tube reactor. Utility Model Content

[0004] In order to overcome the shortcomings of the above-mentioned prior art, the purpose of the utility model is to provide a feeding device for a loop tube reactor, which reduces the kinematic viscosity of the material, increases the flow performance, reduces the movement resistance, and efficiently solves the problem of feeding high-viscosity materials through heating the raw material tank and high-position feeding by pump; effectively solves the problem of material stratification through the reflux process; and reduces the safety risks in the feeding process through nitrogen sealing.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a feeding device for a loop reactor, comprising a tank body, wherein a raw material inlet and a nitrogen inlet are provided on the top of the tank body, a bottom outlet is provided on the bottom of the tank body, and a heater is provided on the outside of the tank body;

[0007] The raw material inlet is connected to a raw material inlet line; the nitrogen inlet is connected to a nitrogen line;

[0008] The bottom outlet is connected to the inlet of the bottom outlet line, and a pump and a pump circulation line are arranged on the bottom outlet line; the outlet of the bottom outlet line is connected to the inlet of the reflux line, and the outlet of the reflux line is connected to the raw material inlet line.

[0009] In a specific implementation process, the outlet of the bottom outlet line is also connected to the inlet of the system inlet line.

[0010] In the specific implementation process, the pump is a high-temperature gear pump, an axial flow pump or a plunger pump.

[0011] In the specific implementation process, electric heating components are arranged outside the pipelines of the raw material inlet line, the nitrogen line, the bottom outlet line, the pump circulation line and the reflux line.

[0012] In a specific implementation process, the electric heating component includes an electric heating belt or an electric heating wire.

[0013] In the specific implementation process, a pump input valve and a pump output valve are sequentially arranged on the bottom outlet line along the internal medium flow direction thereof; and a pump circulation line is arranged on the bottom outlet line between the pump input valve and the pump output valve.

[0014] In the specific implementation process, a pump circulation line regulating valve is arranged on the pump circulation line.

[0015] In the specific implementation process, a return line regulating valve is arranged on the return line.

[0016] In the specific implementation process, a raw material regulating valve is arranged at the position after the outlet of the reflux line is connected to the raw material inlet line.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The utility model provides a feeding device for an annular tube reactor, which heats the raw material tank and uses a pump to feed the material at a high position, thereby reducing the kinematic viscosity of the material, increasing the flow performance, reducing the movement resistance, and efficiently solving the problem of feeding high-viscosity materials; and by adding a reflux process, a pump and a pump circulation line, effectively solving the problem of material stratification; asphalt is introduced from the top of the storage tank through the raw material inlet line, and nitrogen sealing is provided through the nitrogen line to ensure that the pipeline has good sealing performance, reduce the safety risk in the feeding process, prevent asphalt leakage and flammable gas escape, and also prevent asphalt from generating static electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a feeding device for a loop tube reactor of the utility model;

[0020] Figure 2 This is a schematic diagram of a feeding device for a loop reactor according to Example 5 of the utility model;

[0021] Among them: 1-nitrogen line; 2-pressure gauge; 3-raw material inlet; 4-reflux line; 5-system inlet line; 6-pump circulation line; 7-pump; 8-tank; 9-liquid level display device; 10-heater; 11-bottom outlet line; 12-nitrogen line inlet valve; 13-nitrogen line outlet valve; 14-raw material inlet valve; 15-raw material regulating valve; 16-raw material outlet valve; 17-reflux line regulating valve; 18-pump input valve; 19-check valve; 20-pump output valve; 21-pump circulation line regulating valve; 22-system inlet valve. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] The utility model is further described in detail below with reference to the accompanying drawings:

[0025] See also Figure 1 The utility model provides a feeding device for a loop reactor, which includes a tank body 8, a pump 7, a nitrogen line 1, a raw material inlet line, a reflux line 4, a pump circulation line 6, a system inlet line 5 and a bottom outlet line 11. The pump 7, the pump circulation line 6, the reflux line 4 and the system inlet line 5 are used to realize system feeding and material reflux.

[0026] In the specific implementation process, the top of the tank body 8 is provided with a raw material inlet and a nitrogen inlet, the bottom is provided with a bottom outlet, and a heater 10 is provided outside. The raw material inlet is connected to the raw material inlet line; the nitrogen inlet is connected to the nitrogen line 1; the bottom outlet is connected to the inlet of the bottom outlet line 11; the outlet of the bottom outlet line 11 is also connected to the inlet of the reflux line 4 and the inlet of the system inlet line 5. Specifically, the tank body 8 is a high-temperature and high-pressure tank, and the tank body 8 is provided with a liquid level display device 9, a pressure gauge 2, and a heater 10 for realizing raw material preheating and nitrogen protection.

[0027] A liquid level display device 9 is arranged on the upper part of the tank body 8, a pressure gauge 2 is arranged on the top, and a heater 10 can be arranged on the outside; further, the tank body 8 is connected to a DCS control system to realize temperature control and circulation control.

[0028] Among them, introducing nitrogen into the tank body 8 through the nitrogen line 1 can prevent the oil from generating static sparks, thereby avoiding explosion. In addition, nitrogen is a dry gas without moisture. When used as the working medium of the static eliminator, it can effectively eliminate static electricity and avoid the influence of moisture.

[0029] In the specific implementation process, the pump 7 and the pump circulation line 6 are arranged on the bottom outlet line 11. The pump 7 can preferably be a high-temperature gear pump (high-temperature variable frequency pump), an axial flow pump or a plunger pump. The inlet of the reflux line 4 is connected to the outlet of the bottom outlet line 11, and the outlet of the reflux line 4 is connected to the raw material inlet line. The raw material circulates between the tank body 8 and the pump 7 through the reflux line 4, and is fully and evenly heated to prevent the raw material from stratification. The pump circulation line 6 can also regulate the flow rate and protect the pump motor.

[0030] The pump 7 is preferably a high-temperature gear pump, which is a pump used to transport high-temperature media and is usually composed of gears, shafts, bearings, seals, and the like.

[0031] Another feeding method can be used in the feeding device of the loop reactor, which is to feed nitrogen by pressure difference, or to feed by height difference from high to low.

[0032] In the specific implementation process, all pipelines of the entire device are equipped with electric heating components, which are arranged outside the pipelines of the raw material inlet line, nitrogen line 1, bottom outlet line 11, pump circulation line 6 and return line 4. The electric heating components include electric heating belts or electric heating wires. Electric heating is an effective way to keep the pipeline warm, especially suitable for occasions where it is necessary to prevent the medium in the pipeline from solidifying or becoming viscous due to low temperature. Electric heating is arranged in the pipeline, and the medium in the pipeline can be heated by installing electric heating belts or electric heating wires outside the pipeline, thereby ensuring the fluidity of the medium and preventing blockage or solidification.

[0033] During the specific implementation process, a pump input valve 18 and a pump output valve 20 are sequentially arranged on the bottom outlet line 11 along the internal medium flow direction thereof; the pump circulation line 6 is arranged on the bottom outlet line 11 between the pump input valve 18 and the pump output valve 20, and more specifically, the outlet and the inlet of the pump circulation line 6 are respectively arranged close to the pump input valve 18 and the pump output valve 20.

[0034] The implementation of the above-mentioned loop reactor feeding device is as follows:

[0035] (1) Feeding step:

[0036] In the first step, the heater 10 is turned on to preheat the raw material; in the second step, nitrogen enters the tank body 8 through the nitrogen line 1, which plays a nitrogen sealing and stripping role, and at the same time increases the pressure in the tank body 8 and reduces the burden of the pump 7; in the third step, the raw material enters the tank body 8 from the raw material inlet 3 through the raw material inlet line and the raw material inlet; in the fourth step, the raw material is pumped from the bottom outlet line 11 into the system inlet line 5 by the pump 7, and the raw material enters the system through the liquid level difference;

[0037] (2) Reflux Step:

[0038] The raw material circulates between the tank 8 and the pump 7 through the reflux line 4 and is heated fully and evenly.

[0039] (3) Fully automatic feeding steps:

[0040] In the first step, when the liquid level in the tank body 8 is lower than the set value, the raw material inlet 3 is opened to replenish the raw material into the tank body 8; in the second step, the replenished raw material is circulated with the original material.

[0041] Example 1

[0042] The present embodiment provides a feeding device for a loop reactor, comprising a tank body 8, a raw material inlet and a nitrogen inlet are provided at the top of the tank body 8, a bottom outlet is provided at the bottom of the tank body 8, and a heater 10 is arranged outside the tank body 8; the raw material inlet is connected to the raw material inlet line; the nitrogen inlet is connected to the nitrogen line 1; the bottom outlet is connected to the inlet of the bottom outlet line 11, and a pump 7 and a pump circulation line 6 are arranged on the bottom outlet line 11; the outlet of the bottom outlet line 11 is connected to the inlet of the reflux line 4, and the outlet of the reflux line 4 is connected to the raw material inlet line.

[0043] Pump 7 is used to load materials at a high position, thereby reducing the kinematic viscosity of the materials, increasing the flow performance, reducing the movement resistance, and efficiently solving the problem of feeding high-viscosity materials. The asphalt is introduced from the top of the storage tank through the raw material inlet line, and nitrogen is provided through the nitrogen line 1 to ensure the good sealing of the pipeline, reduce the safety risks during the feeding process, prevent asphalt leakage and flammable gas escape, and prevent asphalt from generating static electricity.

[0044] Example 2

[0045] The present embodiment provides a feeding device for a loop reactor, comprising a tank body 8, a raw material inlet and a nitrogen inlet are provided at the top of the tank body 8, a bottom outlet is provided at the bottom of the tank body 8, and a heater 10 is arranged outside the tank body 8; the raw material inlet is connected to the raw material inlet line; the nitrogen inlet is connected to the nitrogen line 1; the bottom outlet is connected to the inlet of the bottom outlet line 11, and a pump 7 and a pump circulation line 6 are arranged on the bottom outlet line 11; the outlet of the bottom outlet line 11 is connected to the inlet of the reflux line 4, and the outlet of the reflux line 4 is connected to the raw material inlet line.

[0046] Among them, see Figure 1 The tank body 8 is a high-temperature and high-pressure tank. A heater 10 is arranged outside the tank body 8. A pressure gauge 2 is arranged on the top of the tank body 8. A liquid level display device 9 is arranged on the upper part of the tank body 8. The tank body 8 is connected to a DCS control system.

[0047] Example 3

[0048] The present embodiment provides a feeding device for a loop reactor, comprising a tank body 8, a raw material inlet and a nitrogen inlet are provided at the top of the tank body 8, a bottom outlet is provided at the bottom of the tank body 8, and a heater 10 is arranged outside the tank body 8; the raw material inlet is connected to the raw material inlet line; the nitrogen inlet is connected to the nitrogen line 1; the bottom outlet is connected to the inlet of the bottom outlet line 11, and a pump 7 and a pump circulation line 6 are arranged on the bottom outlet line 11; the outlet of the bottom outlet line 11 is connected to the inlet of the reflux line 4, the outlet of the reflux line 4 is connected to the raw material inlet line, and the outlet of the bottom outlet line 11 is also connected to the inlet of the system inlet line 5.

[0049] The raw material circulates between the tank 8 and the pump 7 through the reflux line 4 and is fully and evenly heated. The pump circulation line 6 can regulate the flow rate and protect the motor of the pump 7, thereby increasing the reflux process and effectively solving the problem of material stratification.

[0050] Example 4

[0051] The present embodiment provides a feeding device for a loop reactor, comprising a tank body 8, a raw material inlet and a nitrogen inlet are provided at the top of the tank body 8, a bottom outlet is provided at the bottom of the tank body 8, and a heater 10 is arranged outside the tank body 8; the raw material inlet is connected to the raw material inlet line; the nitrogen inlet is connected to the nitrogen line 1; the bottom outlet is connected to the inlet of the bottom outlet line 11, and a pump 7 and a pump circulation line 6 are arranged on the bottom outlet line 11; the outlet of the bottom outlet line 11 is connected to the inlet of the reflux line 4, and the outlet of the reflux line 4 is connected to the raw material inlet line.

[0052] Electric heating components are provided outside the pipelines of the raw material inlet line, the nitrogen line 1, the bottom outlet line 11, the pump circulation line 6 and the reflux line 4.

[0053] Preferably, the electric heating component is an electric heating belt or electric heating wire. The electric heating belt or electric heating wire is installed to heat the medium in the pipeline, thereby ensuring the fluidity of the medium and preventing blockage or solidification.

[0054] Example 5

[0055] The present embodiment provides a feeding device for a loop reactor, comprising a tank body 8, a raw material inlet and a nitrogen inlet are provided at the top of the tank body 8, a bottom outlet is provided at the bottom of the tank body 8, and a heater 10 is arranged outside the tank body 8; the raw material inlet is connected to the raw material inlet line; the nitrogen inlet is connected to the nitrogen line 1; the bottom outlet is connected to the inlet of the bottom outlet line 11, and a pump 7 and a pump circulation line 6 are arranged on the bottom outlet line 11; the outlet of the bottom outlet line 11 is connected to the inlet of the reflux line 4, the outlet of the reflux line 4 is connected to the raw material inlet line, and the outlet of the bottom outlet line 11 is also connected to the inlet of the system inlet line 5.

[0056] Among them, see Figure 2 The outlet and inlet of the pump circulation line 6 are respectively arranged before and after the pump 7. A pump input valve 18 and a pump output valve 20 are sequentially arranged on the bottom outlet line 11 along the medium flow direction; the outlet and inlet of the pump circulation line 6 are connected to the bottom outlet line 11 between the pump input valve 18 and the pump output valve 20, and the outlet and inlet of the pump circulation line 6 are respectively arranged close to the pump input valve 18 and the pump output valve 20.

[0057] A raw material regulating valve 15 is provided at a position where the outlet of the reflux line 4 is connected to the raw material inlet line.

[0058] A nitrogen line inlet valve 12 and a nitrogen line outlet valve 13 are respectively provided near the inlet and outlet of the nitrogen line 1 .

[0059] A raw material inlet valve 14 and a raw material outlet valve 16 are respectively arranged on the raw material inlet line close to the raw material inlet 3 and the raw material inlet of the tank body 8 .

[0060] A return line regulating valve 17 is provided on the return line 4. A check valve 19 is provided on the bottom outlet line 11 between the pump 7 and the pump circulation line 6. A pump circulation line regulating valve 21 is provided on the pump circulation line 6. A system inlet valve 22 is provided near the outlet of the system inlet line 5.

[0061] The utility model provides a feeding device for a loop tube reactor, which reduces the kinematic viscosity of the material, increases the flow performance, reduces the movement resistance, and efficiently solves the problem of feeding high-viscosity materials through heating the raw material tank and high-position feeding of the pump 7; effectively solves the problem of material stratification through the reflux process; and reduces the safety risk in the feeding process through nitrogen sealing.

[0062] The above content is only for explaining the technical idea of ​​the utility model and cannot be used to limit the protection scope of the utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the utility model shall fall within the protection scope of the claims of the utility model.

Claims

1. A feeding device for a loop reactor, It is characterized in that It comprises a tank body (8), the top of the tank body (8) is provided with a raw material inlet and a nitrogen inlet, the bottom of the tank body (8) is provided with a bottom outlet, and a heater (10) is arranged outside the tank body (8); The raw material inlet is connected to a raw material inlet line; the nitrogen inlet is connected to a nitrogen line (1); The bottom outlet is connected to the inlet of a bottom outlet line (11), and a pump (7) and a pump circulation line (6) are arranged on the bottom outlet line (11); the outlet of the bottom outlet line (11) is connected to the inlet of a reflux line (4), and the outlet of the reflux line (4) is connected to a raw material inlet line.

2. The loop reactor feeding device according to claim 1, It is characterized in that The outlet of the bottom outlet line (11) is also connected to the inlet of the system inlet line (5).

3. The loop reactor feeding device according to claim 1, It is characterized in that The pump (7) is a high-temperature gear pump, an axial flow pump or a plunger pump.

4. The loop reactor feeding device according to claim 1, It is characterized in that The pipelines of the raw material inlet line, the nitrogen line (1), the bottom outlet line (11), the pump circulation line (6) and the return line (4) are all provided with electric heating components outside.

5. The loop reactor feeding device according to claim 4, It is characterized in that The electric heating component includes an electric heating belt or an electric heating wire.

6. The loop reactor feeding device according to claim 1, It is characterized in that A pump inlet valve (18) and a pump outlet valve (20) are sequentially arranged on the bottom outlet line (11) along the flow direction of the internal medium of the bottom outlet line (11).

7. The loop reactor feeding device according to claim 6, It is characterized in that The pump circulation line (6) is arranged on the bottom outlet line (11) between the pump inlet valve (18) and the pump outlet valve (20).

8. The loop reactor feeding device according to claim 1, It is characterized in that The pump circulation line (6) is provided with a pump circulation line regulating valve (21).

9. The loop reactor feeding device according to claim 1, It is characterized in that The return line (4) is provided with a return line regulating valve (17).

10. The loop reactor feeding device according to claim 1, It is characterized in that A raw material regulating valve (15) is provided at the position where the outlet of the reflux line (4) is connected to the raw material inlet line.

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