Rapid heating device for conduction oil of polymerization system

Abstract

The utility model relates to the technical field of heat-conducting oil heating, in particular to a rapid heating device for heat-conducting oil of a polymerization system, which comprises a heat-conducting oil preheater, a natural gas boiler and a heat-conducting oil using device, the heat-conducting oil preheater is communicated with a high-pressure steam pipeline and a steam discharge pipeline, and the natural gas boiler comprises a hearth, a heating oil pipe and a chimney. The hearth is communicated with a natural gas pipeline, a first heat-conducting oil pipeline is communicated between the heat-conducting oil preheater and the heating oil pipe, a second heat-conducting oil pipeline is communicated between the heating oil pipe and the heat-conducting oil using device, and a heat-conducting oil return pipeline is communicated between the heat-conducting oil using device and the heat-conducting oil preheater. The natural gas heating device is reasonable and compact in structure and convenient to use, can reduce the use amount of natural gas for heating the heat-conducting oil, reduces the production cost for enterprises, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of heating heat-conducting oil, and is a rapid heating device for heat-conducting oil in a polymerization system. Background Art

[0002] Heat-conducting oil was formerly known as "heat carrier oil" in GB / T 4016-1983 "Nomenclature of Petroleum Products", and its English name is Heat transfer oil. It is a special type of oil with good thermal stability used for indirectly transferring heat. Heat-conducting oil has the characteristics of uniform heating, accurate temperature control, good heat transfer effect, energy saving, convenient transportation and operation, etc. In recent years, it has been widely used in various occasions, and its uses and consumption are increasing.

[0003] In a polymerization process system of a certain chemical enterprise, natural gas is used as raw material, and heat-conducting oil is heated by a natural gas boiler. The heated heat-conducting oil is used for an esterification reactor, a polycondensation reactor, and a gas-phase heat medium heating device. However, as the sole heating energy source, natural gas has a relatively high price, thus bringing a high production cost investment burden to the enterprise.

[0004] The high cost investment in heating the heat-conducting oil has become a technical problem difficult for the enterprise to overcome. Summary of the Invention

[0005] The utility model provides a rapid heating device for heat-conducting oil in a polymerization system, which overcomes the deficiencies of the above-mentioned prior art and can effectively solve the problem of high cost investment existing in the existing heating of heat-conducting oil.

[0006] The technical solution of the utility model is realized by the following measures: A rapid heating device for heat-conducting oil in a polymerization system includes a heat-conducting oil preheater, a natural gas boiler, and a heat-conducting oil using device. The top air inlet of the heat-conducting oil preheater is fixedly connected to a high-pressure steam pipeline, and the bottom air outlet of the heat-conducting oil preheater is fixedly connected to a steam discharge pipeline. The natural gas boiler includes a furnace chamber, a heating oil pipe, and a chimney. The air inlet of the furnace chamber is fixedly connected to a natural gas pipeline. A first heat-conducting oil pipeline is fixedly connected between the lower oil outlet of the heat-conducting oil preheater and the oil inlet of the heating oil pipe. A second heat-conducting oil pipeline is fixedly connected between the oil outlet of the heating oil pipe and the oil inlet of the heat-conducting oil using device. A heat-conducting oil return pipeline is fixedly connected between the oil discharge port of the heat-conducting oil using device and the upper oil inlet of the heat-conducting oil preheater.

[0007] The following is a further optimization and / or improvement of the above technical solution of the utility model:

[0008] The above-mentioned heat-conducting oil using device includes an esterification reactor, a polycondensation reactor, and a gas-phase heat medium heating device. A shunt inlet oil pipe network is fixedly connected between the outlet of the second heat-conducting oil pipeline and the inlet of the esterification reactor, the polycondensation reactor, and the gas-phase heat medium heating device. A drain oil collection pipe network is fixedly connected between the drain outlets of the esterification reactor, the polycondensation reactor, and the gas-phase heat medium heating device and the inlet of the heat-conducting oil return pipeline.

[0009] The above-mentioned device further includes a condensate flash tank. A steam discharge pipeline is fixedly connected between the bottom gas outlet of the heat-conducting oil preheater and the upper gas inlet of the condensate flash tank. The top gas outlet of the condensate flash tank is fixedly connected with a low-pressure steam pipeline, and the bottom liquid outlet of the condensate flash tank is fixedly connected with a condensate recovery pipeline.

[0010] The above-mentioned heat-conducting oil preheater includes a tube side and a shell side. The shell side gas inlet is fixedly connected with a high-pressure steam pipeline, the shell side gas outlet is fixedly connected with a steam discharge pipeline, a heat-conducting oil return pipeline is fixedly connected between the outlet of the drain oil collection pipe network and the inlet of the tube side, and a first heat-conducting oil pipeline is fixedly connected between the outlet of the tube side and the inlet of the heating oil pipe.

[0011] The inlet of the above-mentioned high-pressure steam pipeline is fixedly connected with a high-pressure steam pipe network, and the outlet of the low-pressure steam pipeline is fixedly connected with a low-pressure steam pipe network.

[0012] A first remote pressure gauge and a first control valve are successively fixedly installed on the above-mentioned high-pressure steam pipeline along the medium flow direction, and a second remote pressure gauge is fixedly installed on the low-pressure steam pipeline.

[0013] A heat-conducting oil booster pump and a third remote pressure gauge are successively fixedly installed on the above-mentioned heat-conducting oil return pipeline along the medium flow direction.

[0014] A fourth remote pressure gauge and a second control valve are successively fixedly installed on the above-mentioned natural gas pipeline along the medium flow direction.

[0015] A first remote thermometer is fixedly installed on the above-mentioned first heat-conducting oil pipeline, and a second remote thermometer is fixedly installed on the second heat-conducting oil pipeline.

[0016] The above-mentioned further includes a controller. The first remote pressure gauge, the first control valve, the second remote pressure gauge, the heat-conducting oil booster pump, the third remote pressure gauge, the fourth remote pressure gauge, the second control valve, the first remote thermometer, and the second remote thermometer are all electrically connected to the controller.

[0017] The structure of the utility model is reasonable and compact, and it is convenient to use. It uses high-pressure steam as the heating medium, preheats the heat-conducting oil through the heat-conducting oil preheater; then uses natural gas as the heating medium, and secondary-heats the heat-conducting oil through the natural gas boiler, reducing the consumption of natural gas and reducing the cost consumption for the enterprise. It has the characteristics of safety, labor-saving, simplicity, and high efficiency. Description of the Drawings

[0018] Appendix Figure 1 is a schematic process flow diagram of the present utility model.

[0019] Appendix Figure 1 The codes in it are respectively: 1 is a heat transfer oil preheater, 2 is a natural gas boiler, 3 is a high-pressure steam pipeline, 4 is a steam discharge pipeline, 5 is a furnace, 6 is a heating oil pipeline, 7 is a chimney, 8 is a natural gas pipeline, 9 is a first heat transfer oil pipeline, 10 is a second heat transfer oil pipeline, 11 is a heat transfer oil return pipeline, 12 is an esterification reactor, 13 is a polycondensation reactor, 14 is a gas-phase heat medium heating device, 15 is a shunt oil inlet pipe network, 16 is an oil discharge collection pipe network, 17 is a condensate flash tank, 18 is a low-pressure steam pipeline, 19 is a condensate recovery pipeline, 20 is a tube side, 21 is a shell side, 22 is a high-pressure steam pipe network, 23 is a low-pressure steam pipe network, 24 is a first remote pressure gauge, 25 is a first control valve, 26 is a second remote pressure gauge, 27 is a heat transfer oil booster pump, 28 is a third remote pressure gauge, 29 is a fourth remote pressure gauge, 30 is a second control valve, 31 is a first remote thermometer, 32 is a second remote thermometer. Specific Embodiment

[0020] The present utility model is not limited by the following embodiments, and the specific implementation manner can be determined according to the technical solution of the present utility model and the actual situation.

[0021] In the present utility model, unless otherwise specified, the equipment and devices used are the existing well-known and commonly used equipment and devices in the art.

[0022] In the present utility model, for the convenience of description, the description of the relative position relationship of each component is carried out according to the layout mode of the appendix of the specification Figure 1 For example, the position relationships such as front, rear, upper, lower, left, and right are determined according to the layout direction of the appendix of the specification. Figure 1

[0023] The present utility model will be further described below in conjunction with the embodiments and the drawings:

[0024] Embodiment 1: As shown in Appendix Figure 1 ​As shown in the figure, the rapid heating device for the heat transfer oil of the polymerization system includes a heat transfer oil preheater 1, a natural gas boiler 2, and a heat transfer oil using device. The top air inlet of the heat transfer oil preheater 1 is fixedly connected to a high-pressure steam pipeline 3, and the bottom air outlet of the heat transfer oil preheater 1 is fixedly connected to a steam discharge pipeline 4. The natural gas boiler 2 includes a furnace 5, a heating oil pipe 6, and a chimney 7. The air inlet of the furnace 5 is fixedly connected to a natural gas pipeline 8. There is a fixedly connected first heat transfer oil pipeline 9 between the lower oil outlet of the heat transfer oil preheater 1 and the oil inlet of the heating oil pipe 6. There is a fixedly connected second heat transfer oil pipeline 10 between the oil outlet of the heating oil pipe 6 and the oil inlet of the heat transfer oil using device. There is a fixedly connected heat transfer oil return pipeline 11 between the oil discharge port of the heat transfer oil using device and the upper oil inlet of the heat transfer oil preheater 1.

[0025] According to actual needs, the rapid heating device for the heat transfer oil of the above polymerization system can be further optimized and / or improved:

[0026] Example 2: The difference from Example 1 is that as shown in the attached Figure 1 figure, the heat transfer oil using device includes an esterification reactor 12, a polycondensation reactor 13, and a vapor heat medium heating device 14. There is a fixedly connected shunt inlet oil pipe network 15 between the outlet of the second heat transfer oil pipeline 10 and the oil inlets of the esterification reactor 12, the polycondensation reactor 13, and the vapor heat medium heating device 14. There is a fixedly connected oil discharge collection pipe network 16 between the oil discharge ports of the esterification reactor 12, the polycondensation reactor 13, and the vapor heat medium heating device 14 and the inlet of the heat transfer oil return pipeline 11.

[0027] Example 3: The difference from Examples 1 to 2 is that as shown in the attached Figure 1 figure, the device further includes a condensate flash tank 17. There is a fixedly connected steam discharge pipeline 4 between the bottom air outlet of the heat transfer oil preheater 1 and the upper air inlet of the condensate flash tank 17. The top air outlet of the condensate flash tank 17 is fixedly connected to a low-pressure steam pipeline 18. The bottom liquid outlet of the condensate flash tank 17 is fixedly connected to a condensate recovery pipeline 19.

[0028] Example 4: The difference from Examples 1 to 3 is that as shown in the attached Figure 1 figure, the heat transfer oil preheater 1 includes a tube side 20 and a shell side 21. The air inlet of the shell side 21 is fixedly connected to a high-pressure steam pipeline 3. The air outlet of the shell side 21 is fixedly connected to a steam discharge pipeline 4. There is a fixedly connected heat transfer oil return pipeline 11 between the outlet of the oil discharge collection pipe network 16 and the oil inlet of the tube side 20. There is a fixedly connected first heat transfer oil pipeline 9 between the oil outlet of the tube side 20 and the oil inlet of the heating oil pipe 6.

[0029] Example 5: The difference from Examples 1 to 4 is that as shown in the attached Figure 1 figure, the inlet of the high-pressure steam pipeline 3 is fixedly connected to a high-pressure steam pipe network 22. The outlet of the low-pressure steam pipeline 18 is fixedly connected to a low-pressure steam pipe network 23.

[0030] As required, the saturation temperature of the circulating steam in the high-pressure steam pipeline network 22 reaches 309 °C, and the maximum working pressure reaches 9.8 MPa. Using high-pressure steam as the heating medium, the heat-conducting oil is preheated by the heat-conducting oil preheater 1, and then using natural gas as the heating medium, the heat-conducting oil is reheated to the required temperature by the natural gas boiler 2, which can reduce the consumption of natural gas.

[0031] Example 6: The difference from Examples 1 to 5 is that as shown in the appendix Figure 1 As shown, a first remote pressure gauge 24 and a first control valve 25 are fixedly installed on the high-pressure steam pipeline 3 in sequence along the medium flow direction, and a second remote pressure gauge 26 is fixedly installed on the low-pressure steam pipeline 18.

[0032] Example 7: The difference from Examples 1 to 6 is that as shown in the appendix Figure 1 As shown, a heat-conducting oil booster pump 27 and a third remote pressure gauge 28 are fixedly installed on the heat-conducting oil return pipeline 11 in sequence along the medium flow direction.

[0033] Example 8: The difference from Examples 1 to 7 is that as shown in the appendix Figure 1 As shown, a fourth remote pressure gauge 29 and a second control valve 30 are fixedly installed on the natural gas pipeline 8 in sequence along the medium flow direction.

[0034] Example 9: The difference from Examples 1 to 8 is that as shown in the appendix Figure 1 As shown, a first remote thermometer 31 is fixedly installed on the first heat-conducting oil pipeline 9, and a second remote thermometer 32 is fixedly installed on the second heat-conducting oil pipeline 10.

[0035] Example 10: The difference from Examples 1 to 9 is that as shown in the appendix Figure 1 As shown, the device further includes a controller, and the first remote pressure gauge 24, the first control valve 25, the second remote pressure gauge 26, the heat-conducting oil booster pump 27, the third remote pressure gauge 28, the fourth remote pressure gauge 29, the second control valve 30, the first remote thermometer 31, and the second remote thermometer 32 are all electrically connected to the controller.

[0036] As required, on each pipeline and equipment of the rapid heating device for the heat-conducting oil of the polymerization system, conventional valves, thermometers, pressure gauges, etc. that are well-known and commonly used in the art can also be provided according to production needs. The model of the DCS controller can be the CS3000 controller produced by Yokogawa Corporation of Japan.

[0037] The utility model uses high-pressure steam as the heating medium to preheat the heat-conducting oil through a heat-conducting oil preheater; then uses natural gas as the heating medium to conduct secondary heating on the heat-conducting oil through a natural gas boiler, reducing the consumption of natural gas. The cost price of steam is lower than that of natural gas, reducing the cost consumption for enterprises.

[0038] The above technical features constitute an embodiment of the utility model, which has strong adaptability and implementation effects. Non-essential technical features can be added or reduced according to actual needs to meet the requirements of different situations.

[0039] The usage process of the embodiment of the utility model: First, the high-pressure steam in the high-pressure steam pipe network 22 enters the shell side 21 through the high-pressure steam pipeline 3. The heat-conducting oil discharged from the esterification reactor 12, polycondensation reactor 13, and gas-phase heat medium heating device 14 sequentially returns to the tube side 20 through the oil discharge collection pipe network 16 and the heat-conducting oil return pipeline 11. The high-pressure steam in the shell side 21 heats and pre-elevates the temperature of the heat-conducting oil in the tube side 20. Then, the heat-conducting oil with an elevated temperature in the tube side 20 enters the heating oil pipe 6 through the first heat-conducting oil pipeline 9, and natural gas is burned in the furnace 5 to re-elevate the temperature of the heat-conducting oil in the heating oil pipe 6. At the same time, the circulating steam in the shell side 21 enters the condensate flash tank 17 through the steam discharge pipeline 4 for flash condensation to obtain low-pressure steam and condensate. The low-pressure steam enters the low-pressure steam pipe network 23 through the low-pressure steam pipeline 18, and the condensate enters the downstream process system through the condensate recovery pipeline 19. Finally, the heat-conducting oil with a re-elevated temperature in the heating oil pipe 6 enters the esterification reactor 12, polycondensation reactor 13, and gas-phase heat medium heating device 14 through the second heat-conducting oil pipeline 10 and the shunt inlet oil pipe network 15 respectively for their use.

Claims

1. A rapid heating device for heat transfer oil in a polymerization system, characterized in that It includes a thermal oil preheater, a natural gas boiler, and a thermal oil using device. The top air inlet of the thermal oil preheater is fixedly connected to a high-pressure steam pipeline, and the bottom air outlet of the thermal oil preheater is fixedly connected to a steam exhaust pipeline. The natural gas boiler includes a furnace, a heating oil pipe, and a chimney. The furnace air inlet is fixedly connected to a natural gas pipeline, a first thermal oil pipeline is fixedly connected between the lower oil outlet of the thermal oil preheater and the oil inlet of the heating oil pipe, a second thermal oil pipeline is fixedly connected between the oil outlet of the heating oil pipe and the oil inlet of the thermal oil using device, and a thermal oil reflux pipeline is fixedly connected between the oil discharge port of the thermal oil using device and the upper oil inlet of the thermal oil preheater.

2. The rapid heating device for heat transfer oil in a polymerization system according to claim 1, characterized in that The heat transfer oil using device includes an esterification reactor, a polycondensation reactor, and a gas-phase heat medium heating device. A split oil inlet pipeline network is fixedly connected between the outlet of the second heat transfer oil pipeline and the oil inlets of the esterification reactor, the polycondensation reactor, and the gas-phase heat medium heating device. An oil discharge collection pipeline network is fixedly connected between the oil discharge ports of the esterification reactor, the polycondensation reactor, and the gas-phase heat medium heating device and the inlet of the heat transfer oil reflux pipeline.

3. The rapid heating device for heat transfer oil in a polymerization system according to claim 1 or 2, characterized in that It also includes a condensate flash tank, a steam exhaust pipeline is fixedly connected between the bottom air outlet of the thermal oil preheater and the upper air inlet of the condensate flash tank, the top air outlet of the condensate flash tank is fixedly connected to a low-pressure steam pipeline, and the bottom liquid outlet of the condensate flash tank is fixedly connected to a condensate recovery pipeline.

4. The rapid heating device for heat transfer oil in a polymerization system according to claim 3, characterized in that The heat transfer oil preheater includes a tube side and a shell side. The shell side air inlet is fixedly connected to a high-pressure steam pipeline, the shell side air outlet is fixedly connected to a steam discharge pipeline, a heat transfer oil reflux pipeline is fixedly connected between the outlet of the oil discharge collection pipeline network and the oil inlet of the tube side, and a first heat transfer oil pipeline is fixedly connected between the oil outlet of the tube side and the oil inlet of the heating oil pipe.

5. The rapid heating device for heat transfer oil in a polymerization system according to claim 4, characterized in that The inlet of the high-pressure steam pipeline is fixedly connected to the high-pressure steam pipeline network, and the outlet of the low-pressure steam pipeline is fixedly connected to the low-pressure steam pipeline network.

6. The rapid heating device for heat transfer oil in a polymerization system according to claim 4 or 5, characterized in that A first remote pressure gauge and a first control valve are fixedly installed in sequence along the medium flow direction on the high-pressure steam pipeline, and a second remote pressure gauge is fixedly installed on the low-pressure steam pipeline.

7. The rapid heating device for heat transfer oil in a polymerization system according to claim 1, 2, 4 or 5, characterized in that A thermal oil booster pump and a third remote pressure gauge are fixedly installed in sequence on the thermal oil return pipeline along the medium flow direction.

8. The rapid heating device for heat transfer oil in a polymerization system according to claim 7, characterized in that A fourth remote pressure gauge and a second control valve are fixedly installed in sequence along the medium flow direction on the natural gas pipeline.

9. The rapid heating device for heat transfer oil in a polymerization system according to claim 1, 2, 4, 5 or 8, characterized in that A first remote thermometer is fixedly installed on the first heat transfer oil pipeline, and a second remote thermometer is fixedly installed on the second heat transfer oil pipeline.

10. The rapid heating device for heat transfer oil in a polymerization system according to claim 9, characterized in that It also includes a controller, and the first remote pressure gauge, the first control valve, the second remote pressure gauge, the thermal oil booster pump, the third remote pressure gauge, the fourth remote pressure gauge, the second control valve, the first remote thermometer, and the second remote thermometer are all electrically connected to the controller.

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