Asphalt storage tank heating device for phthalic anhydride production
Through the use of heat -conducting oil -changing devices during the production of benitude, combined with high -pressure steam and electric heating, the exhaust emissions and safety hazards caused by gas heating were solved, and efficient and safe heating effects were achieved.
Patent Information
- Application Number
- CN202421203869.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-29
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-05-29
AI Technical Summary
The prior art uses coal gas to heat the thermal oil in the production process of phthalic anhydride, resulting in large exhaust gas emissions, affecting environmental safety, and posing major safety hazards.
The heating system is used to use the heating system in the form of high -pressure steam and electric heating combinations to replace gas heating, reduce exhaust emissions, and improve heating efficiency.
Achieve efficient heating, replace gas use, reduce exhaust emissions, and ensure the safety of production and environment.
Smart Images
Figure CN222409460U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of tar distillation equipment, and in particular relates to an asphalt storage tank heating device for phthalic anhydride production. Background Art
[0002] In the production process of phthalic anhydride, raw material asphalt is usually needed. Asphalt needs to be in a liquid state before entering the production process, which requires heating and insulation of the asphalt storage tank to keep the asphalt in a liquid state; the existing production process is to set up a thermal oil heating furnace, use the gas generated by the coke oven in the process to heat the thermal oil heating furnace, and let the heated thermal oil go to the asphalt storage tank for heat exchange. However, using gas for heating will have a certain impact on the environment due to the large amount of waste gas emissions; and using gas to heat the thermal oil furnace also has a large safety hazard. Summary of the invention
[0003] The technical problem to be solved by the utility model is to provide a heating device for an asphalt storage tank for tar distillation, which overcomes the defects of the prior art, has good heating effect, can replace coal gas, reduces waste gas emissions, and ensures production and environmental safety.
[0004] In order to solve the above technical problems, the technical solution of the utility model is:
[0005] A heating device for an asphalt storage tank used in phthalic anhydride production comprises an asphalt storage tank provided with a heat transfer oil heat exchange device, the heat transfer oil heat exchange device is provided with a hot oil inlet and a cold oil outlet, the cold oil outlet is connected to an electric heater and a steam heat exchanger in sequence through a cold oil pipeline and a circulation pump, the steam heat exchanger is connected to the hot oil inlet of the heat transfer oil heat exchange device through a hot oil pipeline; the cold oil pipeline between the asphalt storage tank and the electric heater is connected to a high-level tank through a first oil pump and a valve, the hot oil pipeline between the steam heat exchanger and the asphalt storage tank is connected to the high-level tank through a second oil pump and a valve; the high-level tank is connected to a low-level tank through a pipeline and a refueling pump.
[0006] Preferably, the steam inlet of the steam heat exchanger is connected to a high-pressure steam generating device in the production process through a pipeline, and the steam outlet is connected to a steam recovery device through a pipeline.
[0007] Preferably, the electric heater is of model BGY-380 / 750, and the manufacturer is Zhenjiang Yutai Explosion-proof Electric Heater Co., Ltd. The steam heat exchanger is of model R2022-007, and the manufacturer is Shandong Wansheng Construction Engineering Co., Ltd.
[0008] Preferably, the circulating pump and the refueling pump are both model WRY125-100-240B, and the manufacturer is Changzhou Wulin Hot Oil Pump Co., Ltd.
[0009] Preferably, the high-level tank and the low-level tank are both heat transfer oil storage tanks; the low-level tank is arranged on the first-floor platform (ground) of the phthalic anhydride workshop, and the high-level tank is arranged on the fourth-floor platform of the phthalic anhydride workshop.
[0010] Preferably, the high-level tank is provided with a drain port and an exhaust port. Only when the operation is started, the water and gas accumulated in the system are transported to the high-level tank through the hot oil pipeline and the pump, and discharged through the high-level tank. Then, the high-level tank is filled with cold heat transfer oil, and when the oil needs to be supplemented, it is transported to the cold oil pipeline.
[0011] Preferably, the feed port of the low-level tank is connected to an external heat transfer oil storage tank through a pipeline and a pump. Cold heat transfer oil is added to the low-level tank and then transported to the high-level tank to replenish the system with heat transfer oil.
[0012] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0013] The utility model makes full use of the high-pressure steam generated in the production process to heat the heat transfer oil, and uses a heating system in the form of a combination of steam heating and electric heating. First, it can digest the surplus steam in the production process. When the steam is insufficient in winter, electric heating can be used at the same time, which replaces the use of gas and the emission of waste gas, and ensures production and environmental safety.
[0014] In short, the utility model has good heating effect, can replace gas, reduce exhaust gas emissions, and ensure production and environmental safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic diagram of the process of the utility model;
[0016] In the figure, 1. Asphalt storage tank; 2. Cold oil pipeline; 3. Circulation pump; 4. Electric heater; 5. Steam heat exchanger; 6. Hot oil pipeline; 7. High-level tank; 8. Gasoline pump; 9. Low-level tank. DETAILED DESCRIPTION
[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.
[0018] Embodiment 1:
[0019] like Figure 1As shown, a heating device for an asphalt storage tank for phthalic anhydride production comprises an asphalt storage tank 1 provided with a heat transfer oil heat exchange device (not marked), the heat transfer oil heat exchange device is provided with a hot oil inlet (not marked) and a cold oil outlet (not marked), the cold oil outlet is connected to an electric heater 4 and a steam heat exchanger 5 in sequence through a cold oil pipeline 2 and a circulation pump 3, the steam heat exchanger 5 is connected to the hot oil inlet of the heat transfer oil heat exchange device through a hot oil pipeline 6; the cold oil pipeline 2 between the asphalt storage tank 1 and the electric heater 4 is connected to a high-level tank 7 through a first oil pump (not marked) and a valve (not marked), the hot oil pipeline 6 between the steam heat exchanger 5 and the asphalt storage tank 1 is connected to the high-level tank 7 through a second oil pump (not marked) and a valve; the high-level tank 7 is connected to a low-level tank 9 through a pipeline and a refueling pump 8.
[0020] In actual production, when starting work, the cold heat transfer oil in the external heat transfer oil storage tank (not shown) is first transported to the low-level tank 9, and the oil is pumped into the high-level tank 7 through the refueling pump 8. Then, the whole system is filled with heat transfer oil through the high-level tank 7. Because water and gas will accumulate in the system during the process of filling the oil, the oil is pumped into the high-level tank 7 for dehydration and degassing through the second oil delivery pump and valve arranged on the hot oil delivery pipe 6. After the dehydration and degassing are completed, the second oil delivery pump and valve are closed; the heating device is turned on to heat the asphalt storage tank 1. Heating, because it uses the surplus steam in the production process, the steam temperature is about 330℃, which can basically heat the heat transfer oil to 240℃ or above, which can meet the use of asphalt storage tank 1. However, in the cold winter, due to the large demand for insulation, heating the heat transfer oil to 240℃ cannot meet the use of asphalt storage tank 1. Therefore, it is necessary to add an electric heater 4 to heat the heat transfer oil first, and then use the surplus steam to heat it. In this way, the temperature of the heated heat transfer oil can reach about 280℃, which can meet the insulation demand of asphalt storage tank 1. The heat transfer oil system will cause the loss of heat transfer oil during the circulation process, and the heat transfer oil needs to be replenished. The heat transfer oil in the high-level tank 7 can be transported to the cold oil pipeline 2 through the first oil pump and valve for replenishment.
[0021] It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.
Claims
1. A heating device for an asphalt storage tank for phthalic anhydride production, characterized in that: It comprises an asphalt storage tank provided with a heat transfer oil heat exchange device, wherein the heat transfer oil heat exchange device is provided with a hot oil inlet and a cold oil outlet, the cold oil outlet is connected to an electric heater and a steam heat exchanger in sequence through a cold oil pipeline and a circulation pump, the steam heat exchanger is connected to the hot oil inlet of the heat transfer oil heat exchange device through a hot oil pipeline; the cold oil pipeline between the asphalt storage tank and the electric heater is connected to a high-level tank through a first oil pump and a valve, the hot oil pipeline between the steam heat exchanger and the asphalt storage tank is connected to the high-level tank through a second oil pump and a valve; the high-level tank is connected to a low-level tank through a pipeline and a refueling pump.
2. The asphalt storage tank heating device for phthalic anhydride production according to claim 1, characterized in that: The steam inlet of the steam heat exchanger is connected to a high-pressure steam generating device in the production process through a pipeline, and the steam outlet is connected to a steam recovery device through a pipeline.
3. The asphalt storage tank heating device for phthalic anhydride production according to claim 1, characterized in that: The high-level tank and the low-level tank are both heat transfer oil storage tanks; the low-level tank is arranged on the first-floor platform of the phthalic anhydride workshop, and the high-level tank is arranged on the fourth-floor platform of the phthalic anhydride workshop.
4. The asphalt storage tank heating device for phthalic anhydride production according to claim 1, characterized in that: The high-level tank is provided with a drain outlet and an exhaust outlet.
5. The asphalt storage tank heating device for phthalic anhydride production according to claim 1, characterized in that: The feed port of the low-level tank is connected to an external heat transfer oil storage tank through a pipeline and a pump.