A heating, insulation and conveying system for raw anode asphalt

Abstract

This utility model discloses a heating, insulation, and conveying system for raw anode asphalt, relating to the field of asphalt conveying technology. It includes an asphalt storage tank and a conveying pipeline. The asphalt storage tank is connected to the conveying pipeline. A sleeve is provided around the outer periphery of the conveying pipeline. The inner circumferential wall of the sleeve and the outer circumferential wall of the conveying pipeline are spaced apart to form an annular cavity. The annular cavity is connected to a steam supply device. The sleeve is provided with a condensate drain outlet and a steam drain outlet. This utility model utilizes a jacketed design to supply steam into the asphalt conveying system for heating and insulation of the asphalt. Compared to using heat transfer oil, this reduces production costs and is less prone to leakage, coking, and oxidation problems, thus avoiding environmental pollution, improving production safety, and ensuring the production efficiency of prebaked anodes.

Description

Technical Field

[0001] This utility model relates to the field of asphalt conveying technology, and in particular to a green anode asphalt heating and insulation conveying system. Background Technology

[0002] The production process of anodes (prebaked anodes) is an important part of the aluminum electrolysis industry. During the production process, coal tar pitch needs to be supplied as a binder to the equipment using the pitch. During the transportation of coal tar pitch, it needs to be heated and kept warm to prevent it from sticking together.

[0003] The applicant's known method for heating and insulating asphalt is as follows: using a heat transfer oil system to transfer heat to the asphalt conveying system. The heat transfer oil system consists of several main parts, including a heat transfer oil boiler, heat transfer oil, conveying pipelines, and heat-using equipment. It utilizes the waste heat from the tail gas of kilns such as calcining furnaces and rotary kilns, or the combustion heat of fuels such as natural gas and heavy oil as heat sources. The heat transfer oil is heated in the heat transfer oil boiler, and the heated oil is conveyed to the asphalt conveying system through oil pumps and conveying pipelines. However, this method has the disadvantages of large heat transfer oil consumption, high production costs, and the problem of easy leakage, coking, and oxidation of the heat transfer oil due to the long pipelines. When leaking, it pollutes the surrounding environment and affects production safety. At the same time, maintenance after coking and oxidation affects production efficiency.

[0004] Therefore, there is an urgent need for a low-cost, environmentally friendly, safe, and efficient anode asphalt heating, insulation, and conveying system. Utility Model Content

[0005] The purpose of this invention is to provide a heating and insulation conveying system for raw anode asphalt to solve the problems existing in the prior art. By using steam heating and insulation instead of heat transfer oil heating and insulation, costs can be reduced, safety can be improved, and production efficiency can be guaranteed.

[0006] To achieve the above objectives, the present invention provides the following solution: The present invention provides a raw anode asphalt heating and insulation conveying system, including an asphalt storage tank and a conveying pipeline. The asphalt storage tank is connected to the conveying pipeline. The outer periphery of the conveying pipeline is covered with a sleeve. The inner peripheral wall of the sleeve and the outer peripheral wall of the conveying pipeline are spaced apart to form an annular cavity. The annular cavity is connected to a steam supply device. The sleeve is provided with a condensate drain outlet and a steam drain outlet.

[0007] Preferably, a heating pipe is spirally arranged around the outer periphery of the asphalt storage tank, and the heating pipe is connected to the steam supply equipment.

[0008] Preferably, the heating pipe has a semi-circular cross-section, and the flat end of the heating pipe is attached to the outer peripheral wall of the asphalt storage tank.

[0009] Preferably, both the asphalt storage tank and the outer periphery of the casing are provided with a heat insulation layer.

[0010] Preferably, the insulation layer includes a rock wool layer and a stainless steel outer layer arranged sequentially from the inside to the outside.

[0011] Preferably, both the asphalt storage tank and the conveying pipeline are equipped with thermometers for detecting the temperature of the asphalt.

[0012] Preferably, multiple asphalt storage tanks are provided, and the multiple asphalt storage tanks are arranged in parallel.

[0013] Preferably, the delivery pipeline is equipped with an elevated asphalt storage tank.

[0014] Preferably, multiple high-level asphalt storage tanks are provided, and the multiple high-level asphalt storage tanks are arranged in parallel.

[0015] Preferably, the end of the delivery pipeline is connected to the asphalt application equipment.

[0016] The present invention achieves the following main technical effects compared to the prior art: By utilizing a jacketed design, steam is supplied into the asphalt conveying system to heat and maintain the asphalt. Compared with the use of heat transfer oil, this reduces production costs and is less prone to leakage, coking, and oxidation problems, thus avoiding environmental pollution, improving production safety, and ensuring the production efficiency of prebaked anodes.

[0017] The other solutions of this utility model achieve the following technical effects compared to the prior art: The installation of heating pipelines can directly heat and insulate the asphalt storage tank, improving the heating and insulation effect of asphalt in the overall transportation system. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a system diagram of the raw anode asphalt heating, insulation, and conveying system in an embodiment of this utility model; Figure 2 This is a schematic diagram of the conveying pipeline and sleeve in an embodiment of this utility model; Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle; The components include: 1. Asphalt storage tank; 2. Conveying pipeline; 3. Casing; 4. Heating pipeline; 5. Thermometer; 6. High-level asphalt storage tank; 7. Asphalt application equipment; and 8. Unloading pipeline. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] The purpose of this invention is to provide a heating and insulation conveying system for raw anode asphalt to solve the problems existing in the prior art. By using steam heating and insulation instead of heat transfer oil heating and insulation, costs can be reduced, safety can be improved, and production efficiency can be guaranteed.

[0022] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] Please refer to the following: Figures 1-3 As shown, a heating and insulation conveying system for raw anode asphalt is provided, including an asphalt storage tank 1 and a conveying pipeline 2. The asphalt storage tank 1 is connected to the conveying pipeline 2. The outer periphery of the conveying pipeline 2 is covered with a sleeve 3, forming a jacketed design. The inner peripheral wall of the sleeve 3 and the outer peripheral wall of the conveying pipeline 2 are spaced apart to form an annular cavity. The annular cavity is connected to a steam supply device. The sleeve 3 is provided with a condensate outlet and a steam outlet. The conveying pipeline 2 can conduct heat. The steam supply device mainly includes a boiler containing water. The heat source of the boiler comes from the waste heat of the tail gas of kilns such as calcining furnaces and rotary kilns, or the combustion heat of fuels such as natural gas and heavy oil. After absorbing heat, the water evaporates to produce the required steam. The steam can be conveyed to the sleeve 3 through the conveying pipeline and conveying pump to heat and insulate the asphalt in the conveying pipeline 2.

[0024] When starting production, the amount of steam supplied must be greater than the amount of steam supplied during normal production.

[0025] Medium-temperature, low-pressure steam can be selected, as it is suitable for transporting asphalt.

[0026] The pipeline 2 is formed by connecting multiple pipe sections, and each pipe section is fitted with a sleeve 3.

[0027] This solution can be achieved by installing a sleeve 3 on the existing conveying pipeline 2. The two ends of the sleeve 3 are welded to the pipeline. After welding, an airtightness test should be performed. Alternatively, the steam jacketed pipe 3 can be directly used as the conveying pipeline 2 on the new production line.

[0028] A heating pipe 4 is coiled around the outer periphery of the asphalt storage tank 1. The outer shell of the asphalt storage tank 1 can conduct heat. The heating pipe 4 is connected to the steam supply equipment. The heating pipe 4 directly heats and insulates the asphalt storage tank 1, improving the heating and insulation effect of the asphalt in the overall conveying system.

[0029] In one embodiment, the cross-section of the heating pipe 4 can be designed as a semi-circle, and the flat end of the heating pipe 4 is attached to the outer peripheral wall of the asphalt storage tank 1 to increase the contact area between the heating pipe 4 and the asphalt storage tank 1 and improve the heating and heat preservation effect.

[0030] To improve the insulation effect, insulation layers are provided on the outer periphery of the asphalt storage tank 1 and the casing 3. When the heating pipe 4 is designed for the asphalt storage tank 1, the insulation layer is located on the outside of the heating pipe 4 to prevent excessive heat from being transferred to the external environment.

[0031] In one embodiment, the insulation layer includes a rock wool layer and a stainless steel outer layer arranged sequentially from the inside to the outside. The rock wool layer mainly provides insulation, while the stainless steel outer layer mainly improves service life. Of course, other insulation layers that can achieve insulation effects can also be selected.

[0032] The asphalt storage tank 1 and the conveying pipeline 2 are both equipped with thermometers 5 for detecting the temperature of asphalt. The temperature of the asphalt in the asphalt storage tank 1 and the asphalt in the conveying pipeline 2 can be obtained in real time so that the staff can observe the temperature changes. If the temperature is low, the amount of steam input can be increased to improve the heating effect on the asphalt.

[0033] In one embodiment, multiple asphalt storage tanks 1 are provided, and the multiple asphalt storage tanks 1 are connected in parallel. The asphalt storage tanks 1 and the conveying pipeline 2 are controlled by valves. By designing multiple asphalt storage tanks 1, after the asphalt in one asphalt storage tank 1 has been transported, another asphalt storage tank 1 can be started to transport asphalt, thereby improving the continuity of asphalt transportation in the system.

[0034] In one embodiment, an elevated asphalt storage tank 6 is provided on the delivery pipeline 2. The elevated asphalt storage tank 6 mainly serves to store and buffer asphalt, and achieves a stable, timely, accurate and efficient supply of asphalt through the principle of gravity, so as to ensure product quality and improve production efficiency.

[0035] Along the conveying direction of the conveying pipeline 2, the diameter of the pipeline in front of the high-level asphalt storage tank 6 is larger than the diameter of the pipeline behind the high-level asphalt storage tank 6, realizing the coarse pipe inlet and the fine pipe outlet. The purpose of the coarse pipe inlet is to efficiently charge the energy and improve the economic efficiency of the conveying, while the purpose of the fine pipe outlet is to accurately release the energy and improve the process control precision and quality. This design ensures the high efficiency of the system while ensuring the accuracy of the final product (asphalt mixture) proportion and the uniformity of the mixing, thereby improving the intelligence and precision of the entire set of equipment.

[0036] Multiple high-level asphalt storage tanks 6 are provided, and multiple high-level asphalt storage tanks 6 are connected in parallel.

[0037] Heating pipes can also be coiled around the outer perimeter of the high-level asphalt storage tank 6, and an insulation layer can be installed on the outside of the heating pipes to improve the heating and insulation effect.

[0038] The end of the delivery pipeline 2 is connected to the asphalt application equipment 7.

[0039] The asphalt storage tank 1 is also connected to a discharge pipeline 8, which is equipped with a conveying pump and valves. By opening the conveying pump and valves, the asphalt in the asphalt storage tank 1 can be discharged.

[0040] In actual use, asphalt is transported from the asphalt storage tank 1 through the conveying pipeline 2 and the high-level asphalt storage tank 6 to the asphalt use equipment 7 to produce prebaked anodes. During the asphalt transportation process, it is heated and kept warm by steam to prevent it from cooling and sticking.

[0041] Any adaptive changes made according to actual needs are within the protection scope of this utility model.

[0042] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0043] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A heating, insulation, and conveying system for raw anode asphalt, characterized in that, The device includes an asphalt storage tank and a conveying pipeline. The asphalt storage tank is connected to the conveying pipeline. The outer periphery of the conveying pipeline is covered by a sleeve. The inner peripheral wall of the sleeve and the outer peripheral wall of the conveying pipeline are spaced apart to form an annular cavity. The annular cavity is connected to a steam supply device. The sleeve is provided with a condensate drain outlet and a steam drain outlet.

2. The raw anode asphalt heating, insulation, and conveying system according to claim 1, characterized in that, Heating pipes are spirally arranged around the outer periphery of the asphalt storage tank, and the heating pipes are connected to the steam supply equipment.

3. The raw anode asphalt heating, insulation, and conveying system according to claim 2, characterized in that, The heating pipe has a semi-circular cross-section, and the flat end of the heating pipe is attached to the outer peripheral wall of the asphalt storage tank.

4. The raw anode asphalt heating, insulation, and conveying system according to claim 1, characterized in that, Both the asphalt storage tank and the outer periphery of the casing are provided with a heat insulation layer.

5. The raw anode asphalt heating, insulation, and conveying system according to claim 4, characterized in that, The insulation layer includes a rock wool layer and a stainless steel outer layer arranged sequentially from the inside to the outside.

6. The raw anode asphalt heating, insulation, and conveying system according to claim 1, characterized in that, The asphalt storage tank and the pipeline of the conveying line are both equipped with thermometers for detecting the temperature of the asphalt.

7. The raw anode asphalt heating, insulation, and conveying system according to claim 1, characterized in that, Multiple asphalt storage tanks are provided, and the multiple asphalt storage tanks are arranged in parallel.

8. The raw anode asphalt heating, insulation, and conveying system according to claim 1, characterized in that, An elevated asphalt storage tank is installed on the delivery pipeline.

9. The raw anode asphalt heating, insulation, and conveying system according to claim 8, characterized in that, Multiple high-level asphalt storage tanks are provided, and the multiple high-level asphalt storage tanks are connected in parallel.

10. The raw anode asphalt heating, insulation, and conveying system according to claim 1, characterized in that, The end of the delivery pipeline is connected to the asphalt application equipment.

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