Cathode carbon conduction oil heating equipment
By connecting the cathode oil return pipe to the main oil supply pipe and adjusting the pipeline structure, the problem of high oil return pressure of the cathode carbon thermal oil heating system is solved, lower oil return pressure and smoother heating flow are achieved, and the cathode is improved Carbon production efficiency and process control capabilities.
Patent Information
- Application Number
- CN202420942768.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing cathode carbon thermal oil heating system has a large oil return pressure, difficulty in heating, and difficult to control the liquid level of the expansion tank, which seriously restricts the production efficiency and process regulation of cathode carbon.
By connecting the cathode oil return pipe to the main oil supply pipe, the oil return point is located at the rear end of the oil supply point. The main oil supply pipe uses the thermal oil to enter the cathode oil supply pipe to reduce the oil pressure, and then the thermal oil is input through the cathode oil return pipe to The main oil supply pipe forms a negative pressure oil return system, combining the U-shaped expansion structure and the main oil supply pipe with a larger diameter to stabilize the flow of thermally conductive oil.
It effectively reduces the system oil return pressure, improves the heating fluidity, and reduces the oil return pressure of the cathode carbon thermal oil system from 0.83MPa to 0.70MPa, which promotes the production efficiency and process regulation of cathode carbon.
Smart Images
Figure CN222210770U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of waste heat heating equipment, in particular to cathode carbon thermal oil heating equipment. Background Art
[0002] Cathode carbon refers to the carbon material and its accessories that constitute the lining of the aluminum electrolytic cell, usually called the carbon cathode. It directly holds aluminum liquid and electrolyte, and introduces direct current into the cell, and is the most important component of the electrolytic cell. The thermal oil heating system, as an important system for cathode carbon production, is an important heat source for heating cathode carbon production materials. The heating rate of the thermal oil heating system directly affects the production efficiency of cathode carbon, and also has a great impact on the process control of cathode carbon.
[0003] However, the existing thermal oil heating system Figure 3 As shown, the cathode oil return pipe is connected to the main oil return pipe and re-enters the thermal oil furnace for heating. This oil return method makes the cathode carbon thermal oil heating system return oil pressure high, the temperature rise is difficult and the expansion tank liquid level is difficult to control. The above problems seriously restrict the production efficiency and process control of cathode carbon. Utility Model Content
[0004] The utility model aims to provide a cathode carbon thermal oil heating device which can effectively reduce the oil return pressure of the system and ensure smooth temperature rise.
[0005] The embodiment of the utility model is realized through the following technical scheme: a cathode carbon thermal oil heating equipment, comprising a waste heat thermal oil furnace and a cathode heat device, the waste heat thermal oil furnace is respectively connected to a main oil supply pipe and a main oil return pipe; it also comprises a cathode oil supply pump group and a cathode oil return pump group, the two ends of the cathode heat device are respectively connected to the cathode oil supply pump group and the cathode oil return pump group; the cathode oil supply pump group is connected to a cathode oil supply pipe, and the cathode oil return pump group is connected to a cathode oil return pipe; the cathode oil supply pipe and the cathode oil return pipe are both connected to the main oil supply pipe.
[0006] Preferably, the oil return point where the cathode oil return pipe is connected to the main oil supply pipe is located at the rear end of the oil supply point where the cathode oil supply pipe is connected to the main oil supply pipe.
[0007] Preferably, the oil supply point where the cathode oil supply pipe is connected to the main oil supply pipe is at least 100 meters away from the oil return point where the cathode oil return pipe is connected to the main oil supply pipe.
[0008] Preferably, the tail end of the main oil supply pipe is connected to an anode oil supply pipe, and the cathode oil return pipe is communicated with the anode oil supply pipe.
[0009] Preferably, the cathode oil return pipe is provided with a plurality of elbows; the elbows form a U-shaped expansion structure.
[0010] Preferably, the diameter of the total oil supply pipe is larger than the sum of the diameters of the cathode oil supply pipe and the cathode oil return pipe.
[0011] The technical solution of the embodiments of the utility model has at least the following advantages and beneficial effects: compared with the prior art, the utility model changes the cathode oil return pipe to be connected to the main oil supply pipe with a higher temperature, so that when a part of the heat transfer oil in the main oil supply pipe enters the cathode oil supply pipe, the oil pressure will be reduced, and then the cathode oil return pipe is connected to the main oil supply pipe at the rear end of the oil supply point, and the cathode oil return pipe then inputs a part of the heat transfer oil into the main oil supply pipe, thereby achieving the effect of reducing the system return oil pressure, which helps to increase the return oil temperature. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.
[0013] Figure 1 A schematic diagram of the structure of a cathode carbon thermal oil heating device provided in Example 1 of the utility model;
[0014] Figure 2 This is a schematic diagram of the structure in which the elbow in the utility model is connected to the cathode oil return pipe;
[0015] Figure 3 It is a schematic diagram of the pipeline connection of the cathode carbon thermal oil heating equipment in the prior art;
[0016] Figure 4 This is a schematic diagram of the structure of the cathode carbon thermal oil heating device in Example 2 of the utility model.
[0017] Icons: 1-waste heat thermal oil boiler, 2-main oil supply pipe, 3-main oil return pipe, 4-cathode oil supply pipe, 5-cathode oil supply pump group, 6-cathode oil return pump group, 7-cathode oil return pipe, 8-cathode heating device, 9-anode oil supply pipe, 10-anode oil return pipe, 11-elbow. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.
[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0020] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0021] Example 1
[0022] The following is further described in conjunction with specific embodiments. Figure 1-Figure 2 As shown, this embodiment is a cathode carbon thermal oil heating device, including a waste heat thermal oil furnace 1 and a cathode heat device 8, the waste heat thermal oil furnace 1 is respectively connected to a main oil supply pipe 2 and a main oil return pipe 3; it also includes a cathode oil supply pump group 5 and a cathode oil return pump group 6, and the two ends of the cathode heat device 8 are respectively connected to the cathode oil supply pump group 5 and the cathode oil return pump group 6; the cathode oil supply pump group 5 is connected to the cathode oil supply pipe 4, and the cathode oil return pump group 6 is connected to the cathode oil return pipe 7; the cathode oil supply pipe 4 and the cathode oil return pipe 7 are both connected to the main supply The oil pipe 2 is connected; specifically, the model of the waste heat thermal oil furnace 1 is Q48 / 95-12-10-300, with a rated thermal power of 12000kW, a rated working pressure of 1.0MPa, a rated outlet / inlet oil temperature of 300 / 275℃, and the flue gas after the tank furnace is used as fuel; it is equipped with a W-65№23D boiler induced draft fan (flow rate 102300m3 / h, full pressure 1500Pa, motor power 160kW, speed 740r / min) to ensure the supply of waste heat flue gas.
[0023] The main oil supply pipe 2 provides high-temperature heat transfer oil to the equipment system to be heated, such as the cathode heating device 8, which includes a vibration molding machine, an asphalt tempering system, a HP-DMH4000 dry material preheater, a V=5m3 asphalt high-level tank, an LQC1.2 asphalt scale, a Q05B kneading pot, etc.
[0024] The main oil return pipe 3 leads the low-temperature heat transfer oil after heat exchange to the waste heat heat transfer oil furnace 1 for heating; the cathode oil supply pipe 4 is orthogonally connected to the main oil supply pipe 2 to provide high-temperature heat transfer oil for the cathode carbon system equipment to be heated.
[0025] The utility model is based on the prior art (refer to Figure 3 As shown in the figure, by changing the way of connecting the cathode oil return pipe 7 with the main oil return pipe 3 to connect it with the main oil supply pipe 2, and the oil return point is located at the rear end of the oil supply point, that is, when the main oil supply pipe 2 first inputs a part of the heat transfer oil into the cathode oil supply pipe 4, the oil pressure will be reduced first, and the cathode oil return pipe 7 will input the heat transfer oil into the main oil supply pipe 2 again, so as to achieve a better performance than the conventional method. Figure 3 Effect of lower oil pressure.
[0026] Reference Figure 1 As shown, the oil return point where the cathode oil return pipe 7 and the main oil supply pipe 2 are connected in this embodiment is located at the rear end of the oil supply point where the cathode oil supply pipe 4 and the main oil supply pipe 2 are connected. Specifically, a part of the heat transfer oil in the main oil supply pipe 2 is discharged first and then the oil pressure in the pipe is reduced, and then the low-temperature heat transfer oil in the cathode oil return pipe 7 flows into the main oil supply pipe 2 again.
[0027] It should be noted that, in order to ensure a good pressure reduction effect, the oil supply point where the cathode oil supply pipe 4 is connected to the main oil supply pipe 2 is at least 100 meters away from the oil return point where the cathode oil return pipe 7 is connected to the main oil supply pipe 2.
[0028] Reference Figure 1 As shown, the tail end of the main oil supply pipe 2 in this embodiment is connected to the anode oil supply pipe 9, and the cathode oil return pipe 7 is connected to the anode oil supply pipe 9. The cathode oil return pipe 7 adopts a DN200×150 concentric reducer to reduce the diameter and then extends along the anode carbon thermal oil pipeline, and is orthogonally connected to the anode oil supply pipe 9 at a distance of 100m from the oil intake point of the cathode oil supply pipe 4. The low-temperature thermal oil after heat exchange is merged into the anode carbon high-temperature thermal oil, and enters the anode carbon heating system equipment through the anode carbon thermal oil circulation pump RY300-250-500 (flow rate 800m3 / h, head 80m, cavitation margin 6m, equipped power 250kW), and is led to the waste heat thermal oil furnace 1 for heating after secondary heat exchange, thereby acting on heating the cathode carbon and the anode carbon at the same time.
[0029] After the main oil supply pipe 2 inputs the anode oil supply pipe 9 to heat the anode carbon system equipment at high temperature, the low-temperature heat transfer oil is led along the anode return oil pipe 10 and the main oil return pipe 3 to the waste heat heat transfer oil furnace 1 for heating.
[0030] The cathode oil return pipe 7 is provided with a plurality of elbows 11; the elbows 11 form a U-shaped expansion structure, which can effectively eliminate the displacement caused by thermal expansion and contraction of the pipeline.
[0031] In addition, the diameter of the main oil supply pipe 2 is larger than the sum of the diameters of the cathode oil supply pipe 4 and the cathode oil return pipe 7 , and the main oil supply pipe 2 has a relatively larger carrying capacity.
[0032] In summary, the oil return of the cathode carbon thermal oil system changes from positive pressure oil return to negative pressure oil return, and the oil return pressure of the cathode carbon thermal oil system is reduced from 0.83MPa in the prior art to 0.70MPa in the utility model. The pressure is relatively smaller, which is conducive to flow rate and temperature rise.
[0033] Example 2
[0034] Reference Figure 4 As shown, this solution only connects the cathode carbon heating system, and the waste heat thermal oil furnace 1 is directly connected to the cathode oil supply pipe 4 and the cathode oil return pipe 7. The return oil pressure of this method is relatively Figure 3 Also smaller.
[0035] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A cathode carbon thermal oil heating device, comprising a waste heat thermal oil furnace (1) and a cathode heat device (8), Features: The waste heat thermal oil furnace (1) is respectively connected to a main oil supply pipe (2) and a main oil return pipe (3); It also includes a cathode oil supply pump group (5) and a cathode oil return pump group (6), and the two ends of the cathode heat device (8) are connected to the cathode oil supply pump group (5) and the cathode oil return pump group (6) respectively; The cathode oil supply pump group (5) is connected to a cathode oil supply pipe (4), and the cathode oil return pump group (6) is connected to a cathode oil return pipe (7); The cathode oil supply pipe (4) and the cathode oil return pipe (7) are both connected to the main oil supply pipe (2).
2. The cathode carbon thermal oil heating device according to claim 1, Features: The oil return point where the cathode oil return pipe (7) is connected to the main oil supply pipe (2) is located at the rear end of the oil supply point where the cathode oil supply pipe (4) is connected to the main oil supply pipe (2).
3. The cathode carbon thermal oil heating device according to claim 2, Features: The oil supply point where the cathode oil supply pipe (4) is connected to the main oil supply pipe (2) is at least 100 meters away from the oil return point where the cathode oil return pipe (7) is connected to the main oil supply pipe (2).
4. The cathode carbon thermal oil heating device according to claim 1, Features: The tail end of the main oil supply pipe (2) is connected to an anode oil supply pipe (9), and the cathode oil return pipe (7) is in communication with the anode oil supply pipe (9).
5. The cathode carbon thermal oil heating device according to claim 1, Features: The cathode oil return pipe (7) is provided with a plurality of elbows (11).
6. The cathode carbon thermal oil heating device according to claim 5, Features: The elbow (11) forms a U-shaped expansion structure.
7. The cathode carbon thermal oil heating device according to claim 1, Features: The diameter of the main oil supply pipe (2) is greater than the sum of the diameters of the cathode oil supply pipe (4) and the cathode oil return pipe (7).