Vinyl chloride converter device applied to novel heat removal medium of gold-based mercury-free catalyst

Abstract

The utility model relates to the technical field of mercury-free catalysts, in particular to a vinyl chloride converter device applied to a novel heat removal medium of a gold-based mercury-free catalyst, which comprises a premixer, a waste heat boiler, a conduction oil storage tank, a foreground converter, a background converter, a crude vinyl chloride demister and a flash tank, the front stage converter comprises a first upper sealing head, a first lower sealing head and a first shell, the first upper sealing head, the first shell and the first lower sealing head are sequentially and fixedly communicated from top to bottom, the back stage converter comprises a second upper sealing head, a second lower sealing head and a second shell, and the second upper sealing head, the second shell and the second lower sealing head are sequentially and fixedly communicated from top to bottom. The pressure vessel is reasonable and compact in structure and convenient to use, can efficiently remove reaction heat of the gold-based catalyst, solves the limitation of the conventional pressure vessel, reduces the cost and safety risk, improves the operation stability of a converter, prolongs the service life of the catalyst, and has the characteristics of safety, labor saving, simplicity, convenience and high efficiency.

Description

Technical Field

[0001] This utility model relates to the field of mercury-free catalyst technology, and is a vinyl chloride converter device applied to a novel heat-relief medium based on gold-based mercury-free catalyst. Background Technology

[0002] The core reaction in the gold-based catalyst synthesis of vinyl chloride is the hydrochlorination of acetylene (C2H2) and hydrogen chloride (HCl), and the reaction temperature typically needs to be maintained within the range of 200℃ to 230℃. Using heat transfer oil as the heat exchange medium, the reactor temperature is precisely regulated through a circulation system, ensuring efficient utilization of the catalyst's active sites and preventing catalyst deactivation due to localized overheating.

[0003] The high specific heat capacity (1.8 kJ / kg·K to 2.5 kJ / kg·K) and low viscosity (kinematic viscosity at 40℃ is 40 mm² / s to 70 mm² / s) of heat transfer oils result in better fluidity and higher heat transfer efficiency. Furthermore, the viscosity of heat transfer oils remains relatively constant at high temperatures, making them safer than steam heating (which requires a high-pressure system) and exhibiting smaller temperature fluctuations (within ±2℃), which is beneficial for improving reaction selectivity and conversion rate.

[0004] In my country, 73% of PVC production uses the calcium carbide process. Traditional mercury catalysts cause serious pollution due to mercury vapor volatilization and have been listed as phased out under the Minamata Convention. While gold-based mercury-free catalysts solve the mercury pollution problem, their reaction temperature is as high as 200℃ to 280℃, significantly higher than the 120℃ to 180℃ of mercury catalysts. This leads to a surge in reaction heat load and places higher demands on the heat dissipation system.

[0005] Current heat removal technologies include hot water heat removal and heptane heat removal.

[0006] (1) Hot water heat removal: Traditional process uses hot water circulation for heat removal, but hot water has a low boiling point (100℃ at normal pressure), which cannot meet the high temperature reaction requirements, and the heat utilization rate is low (only 60%). It requires a lithium bromide refrigeration system, which consumes a lot of energy.

[0007] (2) Heptane heat removal: Heptane has a high boiling point (98.5℃) and can be used to produce steam by flash evaporation, but a pressure vessel type converter is required.

[0008] Meanwhile, the heptane heat removal technology also has the following problems:

[0009] Equipment requirements: Requires a pressure vessel, which is difficult to modify; Heat removal efficiency: Single-pass heat removal, temperature control accuracy ±5℃; Operating costs: Requires a high-pressure pump, which consumes a lot of energy; Safety: Risks associated with high temperature and high pressure; Scope of application: Only suitable for new equipment.

[0010] Given the problems of large equipment investment, long transformation cycle, and poor system compatibility of existing technologies, as well as their incompatibility with the company's existing non-pressure vessel type converters, there is an urgent need to develop a new heat dissipation device. Summary of the Invention

[0011] This invention provides a vinyl chloride converter device for a novel heat-removing medium based on a mercury-free gold catalyst, which overcomes the shortcomings of the prior art and can effectively solve the problems of low heat utilization, high energy consumption, large investment, long transformation cycle and poor system compatibility of existing mercury-free gold catalyst heat removal systems.

[0012] The technical solution of this utility model is achieved through the following measures: A vinyl chloride converter device applied to a novel heat-removing medium based on a mercury-free catalyst, comprising a premixer, a waste heat boiler, a thermal oil storage tank, a front-end converter, a back-end converter, a crude vinyl chloride demister, and a flash tank. A first mixed gas supply pipeline is fixedly connected between the top outlet of the premixer and the top inlet of the front-end converter. A second mixed gas supply pipeline is fixedly connected between the bottom outlet of the front-end converter and the top inlet of the back-end converter. A crude vinyl chloride delivery pipeline is fixedly connected between the outlet of the back-end converter and the inlet of the crude vinyl chloride demister. A first thermal oil supply pipeline is fixedly connected between the bottom outlet of the thermal oil storage tank and the lower inlet of the front-end converter. The oil inlet pipeline is connected to the first heat transfer oil inlet pipeline and the second heat transfer oil inlet pipeline is fixedly connected to the lower oil inlet of the back-end converter. The upper oil outlet of the front-end converter is fixedly connected to the top inlet of the waste heat boiler and the first heat transfer oil outlet pipeline. The upper oil outlet of the back-end converter is fixedly connected to the first heat transfer oil outlet pipeline and the second heat transfer oil outlet pipeline. The bottom oil outlet of the waste heat boiler is fixedly connected to the top oil inlet of the heat transfer oil storage tank and the heat transfer oil return pipeline. The lower water outlet of the flash tank is fixedly connected to the top water inlet of the waste heat boiler and the hot water inlet pipeline. The top air outlet of the waste heat boiler is fixedly connected to the upper air inlet of the flash tank and the steam output pipeline. The top outlet of the flash tank is fixedly connected to the steam to the external network pipeline.

[0013] The following are further optimizations and / or improvements to the above-mentioned utility model technical solution:

[0014] The aforementioned front-end converter includes a first upper end cap, a first lower end cap, and a first housing. The first upper end cap, the first housing, and the first lower end cap are fixedly connected from top to bottom. The back-end converter includes a second upper end cap, a second lower end cap, and a second housing. The second upper end cap, the second housing, and the second lower end cap are fixedly connected from top to bottom. A first mixed gas inlet pipeline is fixedly connected between the top outlet of the premixer and the inlet of the first upper end cap. A second mixed gas inlet pipeline is fixedly connected between the outlet of the first lower end cap and the inlet of the second upper end cap. A crude vinyl chloride delivery pipeline is fixedly connected between the outlet of the second lower end cap and the inlet of the crude vinyl chloride demister.

[0015] A first thermal oil inlet pipeline is fixedly connected between the bottom oil outlet of the aforementioned thermal oil storage tank and the lower oil inlet of the first shell. A second thermal oil inlet pipeline is fixedly connected between the first thermal oil inlet pipeline and the lower oil inlet of the second shell. A first thermal oil outlet pipeline is fixedly connected between the upper oil outlet of the first shell and the top inlet of the waste heat boiler. A second thermal oil outlet pipeline is fixedly connected between the upper oil outlet of the second shell and the first thermal oil outlet pipeline.

[0016] A first heat transfer circulation pump is fixedly installed on the first heat transfer oil inlet pipeline between the aforementioned heat transfer oil storage tank and the second heat transfer oil inlet pipeline.

[0017] A backup heat transfer oil inlet pipeline is fixedly connected between the first heat transfer oil inlet pipeline between the heat transfer oil storage tank and the first heat transfer circulation pump and the first heat transfer oil inlet pipeline between the first heat transfer circulation pump and the front-end converter. A second heat transfer circulation pump is fixedly installed on the backup heat transfer oil inlet pipeline.

[0018] The first heat transfer oil output pipeline between the second heat transfer oil output pipeline and the waste heat boiler is fixedly connected to the heat transfer oil storage tank by a heat transfer oil return pipeline, and a first regulating valve is fixedly installed on the heat transfer oil return pipeline.

[0019] Both the first and second heat transfer circulation pumps mentioned above are variable frequency pumps.

[0020] A second regulating valve is fixedly installed on the first heat transfer oil output pipeline between the second heat transfer oil inlet pipeline and the front-end converter, and a third regulating valve is fixedly installed on the second heat transfer oil inlet pipeline.

[0021] The aforementioned front-end converter and back-end converter are equipped with a first temperature detector, a second temperature detector, and a third temperature detector, arranged sequentially from top to bottom.

[0022] The above also includes a controller, and the first temperature detector, the second temperature detector, the third temperature detector, the second regulating valve, and the third regulating valve are all electrically connected to the controller.

[0023] This utility model has a reasonable and compact structure and is easy to use. It can achieve efficient removal of the heat of reaction of gold-based catalysts, overcome the limitations of existing pressure vessels, reduce costs and safety risks, improve the operational stability of converters, and extend the service life of catalysts. It is safe, labor-saving, simple and efficient. Attached Figure Description

[0024] Appendix Figure 1 This is a schematic diagram of the process flow of this utility model.

[0025] Appendix Figure 1The codes in the diagram are as follows: 1 for premixer, 2 for waste heat boiler, 3 for thermal oil storage tank, 4 for first upper head, 5 for first lower head, 6 for crude vinyl chloride demister, 7 for flash tank, 8 for first mixed gas inlet pipeline, 9 for second mixed gas inlet pipeline, 10 for crude vinyl chloride delivery pipeline, 11 for first thermal oil inlet pipeline, 12 for second thermal oil inlet pipeline, 13 for first thermal oil outlet pipeline, 14 for second thermal oil outlet pipeline, and 15 for thermal oil return pipeline. 16 is the hot water inlet pipeline, 17 is the steam outlet pipeline, 18 is the first shell, 19 is the second upper head, 20 is the second lower head, 21 is the second shell, 22 is the first heat transfer circulation pump, 23 is the second heat transfer circulation pump, 24 is the standby heat transfer oil inlet pipeline, 25 is the first regulating valve, 26 is the second regulating valve, 27 is the third regulating valve, 28 is the first temperature detector, 29 is the second temperature detector, 30 is the third temperature detector, and 31 is the heat transfer oil return pipeline. Detailed Implementation

[0026] This utility model is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this utility model and the actual situation.

[0027] Unless otherwise specified, all equipment and devices used in this invention are existing and commonly known in the art. For example, the premixer 1, waste heat boiler 2, thermal oil storage tank 3, front-end converter, back-end converter, crude vinyl chloride demister 6, and flash tank 7 are all existing and commonly known equipment in the art.

[0028] In this utility model, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as the positional relationships of front, back, top, bottom, left, and right, which are based on the instructions attached. Figure 1 The orientation of the layout is determined by the direction of the map.

[0029] The present invention will be further described below with reference to the embodiments and accompanying drawings:

[0030] Example 1: As shown in the attached document Figure 1As shown, the vinyl chloride converter device applied to the novel heat-removing medium of gold-based mercury-free catalyst includes a premixer 1, a waste heat boiler 2, a heat transfer oil storage tank 3, a front-end converter, a back-end converter, a crude vinyl chloride demister 6, and a flash tank 7. A first mixed gas inlet pipeline 8 is fixedly connected between the top outlet of the premixer 1 and the top inlet of the front-end converter. A second mixed gas inlet pipeline 9 is fixedly connected between the bottom outlet of the front-end converter and the top inlet of the back-end converter. A crude vinyl chloride delivery pipeline 10 is fixedly connected between the outlet of the back-end converter and the inlet of the crude vinyl chloride demister 6. A first heat transfer oil inlet pipeline 11 is fixedly connected between the bottom outlet of the heat transfer oil storage tank 3 and the lower inlet of the front-end converter. A second heat transfer oil inlet pipeline 12 is fixedly connected between the bottom oil inlet of the back-end converter and the top oil inlet of the waste heat boiler 2. A first heat transfer oil outlet pipeline 13 is fixedly connected between the top oil outlet of the front-end converter and the top inlet of the waste heat boiler 2. A second heat transfer oil outlet pipeline 14 is fixedly connected between the top oil outlet of the back-end converter and the first heat transfer oil outlet pipeline 13. A heat transfer oil return pipeline 15 is fixedly connected between the bottom oil outlet of the waste heat boiler 2 and the top oil inlet of the heat transfer oil storage tank 3. A hot water inlet pipeline 16 is fixedly connected between the bottom water outlet of the flash tank 7 and the top water inlet of the waste heat boiler 2. A steam outlet pipeline 17 is fixedly connected between the top air outlet of the waste heat boiler 2 and the top air inlet of the flash tank 7. A steam to external network pipeline 32 is fixedly connected to the top outlet of the flash tank 7.

[0031] In application, this utility model, through the heat transfer oil heat removal process, is compatible with existing non-pressure vessels in terms of equipment requirements, requiring minimal modification; in terms of heat removal efficiency, through multi-stage heat exchange, the temperature control accuracy is ±2℃; in terms of operating costs, through atmospheric pressure circulation, energy consumption is reduced by 30%; in terms of safety, atmospheric pressure operation results in a low risk of leakage; and in terms of applicability, it is compatible with existing devices and has strong scalability.

[0032] In this invention, the heat transfer oil is first added by heating the heat transfer oil in the heat transfer oil storage tank 3 to 150°C to 160°C through the waste heat boiler 2. Then, it is pumped to the front-end converter and the back-end converter by the heat transfer circulation pump. After absorbing the heat generated by the reaction, the output heat transfer oil temperature is 160°C to 170°C. It is then transported to the waste heat boiler 2 to exchange heat with the external hot water to form steam, which is supplied to downstream users, so that the heat can be reused.

[0033] The above-mentioned vinyl chloride converter device applied to the novel heat-relief medium based on gold-based mercury-free catalyst can be further optimized and / or improved according to actual needs:

[0034] Example 2: Its difference from Example 1 is as follows: (See attached) Figure 1As shown, the front-end converter includes a first upper end cap 4, a first lower end cap 5, and a first housing 18. The first upper end cap 4, the first housing 18, and the first lower end cap 5 are fixedly connected from top to bottom. The back-end converter includes a second upper end cap 19, a second lower end cap 20, and a second housing 21. The second upper end cap 19, the second housing 21, and the second lower end cap 20 are fixedly connected from top to bottom. A first mixed gas inlet pipeline 8 is fixedly connected between the top outlet of the premixer 1 and the inlet of the first upper end cap 4. A second mixed gas inlet pipeline 9 is fixedly connected between the outlet of the first lower end cap 5 and the inlet of the second upper end cap 19. A crude vinyl chloride delivery pipeline 10 is fixedly connected between the outlet of the second lower end cap 20 and the inlet of the crude vinyl chloride demister 6.

[0035] Example 3: Its difference from Examples 1 to 2 is as follows: (See attached) Figure 1 As shown, a first heat transfer oil inlet pipeline 11 is fixedly connected between the bottom oil outlet of the heat transfer oil storage tank 3 and the lower oil inlet of the first shell 18. A second heat transfer oil inlet pipeline 12 is fixedly connected between the first heat transfer oil inlet pipeline 11 and the lower oil inlet of the second shell 21. A first heat transfer oil outlet pipeline 13 is fixedly connected between the upper oil outlet of the first shell 18 and the top inlet of the waste heat boiler 2. A second heat transfer oil outlet pipeline 14 is fixedly connected between the upper oil outlet of the second shell 21 and the first heat transfer oil outlet pipeline 13.

[0036] First, heat transfer oil possesses excellent thermal conductivity, enabling it to quickly absorb the heat generated during converter operation and promptly transfer it away, ensuring stable operation of the converter at a suitable temperature and improving conversion efficiency and product quality. Simultaneously, heat transfer oil exhibits relatively stable chemical properties, exhibiting low corrosiveness to equipment and adaptability to converters and related equipment made of various materials, extending equipment lifespan and reducing maintenance costs. Furthermore, its lower operating pressure allows it to operate at atmospheric or low pressure, offering greater safety and lower pressure resistance requirements compared to some cooling media that require high pressure. Moreover, heat transfer oil can be circulated within a closed system, reducing the consumption and replacement of cooling media, increasing byproduct steam, and lowering production costs and environmental impact.

[0037] Secondly, the heat transfer oil can maintain a stable liquid state over a wide temperature range, facilitating precise temperature control. It can achieve relatively accurate temperature regulation according to the actual needs of the vinyl chloride converter, avoiding adverse effects of temperature fluctuations on the conversion process, which is particularly important for some temperature-sensitive chemical reactions.

[0038] Furthermore, heat transfer oil, with its high specific heat capacity, experiences a relatively small temperature rise when absorbing the same amount of heat. This reduces energy loss during heat transfer, improves energy efficiency, achieves energy conservation and emission reduction, and lowers the production and operating costs of enterprises.

[0039] In this invention, as needed, heat transfer oil is filled into the shell side of the front-end converter and the back-end converter. The heat transfer oil is forced to circulate through an external heat transfer circulation pump. The flow rate of the heat transfer oil is adjusted by the frequency converter of the heat transfer circulation pump to reduce the response time.

[0040] On the other hand, the heat transfer oil absorbs heat generated by the reaction in the front-end and back-end converters, causing its temperature to rise. The high-temperature heat transfer oil then enters the waste heat boiler 2, which contains pressurized water. The high-temperature heat transfer oil transfers heat to the water in the boiler through heat exchange, causing the water to vaporize and generate steam. At the same time, the temperature of the heat transfer oil itself decreases. The cooled heat transfer oil then circulates back to the front-end and back-end converters to continue absorbing heat. This cycle repeats continuously, achieving continuous heat transfer and steam as a byproduct. The steam generated by the waste heat boiler 2 is returned to the steam main and supplied to downstream users.

[0041] Based on our company's investment calculations, the renovation of a 10,000-ton gold-based catalyst converter requires 8.4 million yuan. The current national production capacity of calcium carbide method is approximately 21.64 million tons, which could save the industry a total of 18.2 billion yuan. If all of these are changed to heat transfer oil as the heat removal medium, the above-mentioned investment can be reduced.

[0042] Example 4: Its difference from Examples 1 to 3 is as follows: (See attached) Figure 1 As shown, a first heat transfer circulation pump 22 is fixedly installed on the first heat transfer oil inlet pipeline 11 between the heat transfer oil storage tank 3 and the second heat transfer oil inlet pipeline 12.

[0043] Example 5: It differs from Examples 1 to 4 in that, as shown in the appendix... Figure 1 As shown, a backup heat transfer oil inlet pipeline 24 is fixedly connected between the first heat transfer oil inlet pipeline 11 between the heat transfer oil storage tank 3 and the first heat transfer circulation pump 22 and the first heat transfer oil inlet pipeline 11 between the first heat transfer circulation pump 22 and the front-end converter. A second heat transfer circulation pump 23 is fixedly installed on the backup heat transfer oil inlet pipeline 24.

[0044] Example 6: Its difference from Examples 1 to 5 is as follows: (See attached) Figure 1 As shown, a heat transfer oil return pipeline 31 is fixedly connected between the first heat transfer oil output pipeline 13 between the second heat transfer oil output pipeline 14 and the waste heat boiler 2 and the heat transfer oil storage tank 3. A first regulating valve 25 is fixedly installed on the heat transfer oil return pipeline 31.

[0045] Example 7: Its difference from Examples 1 to 6 is as follows: (See attached) Figure 1 As shown, both the first heat transfer circulation pump 22 and the second heat transfer circulation pump 23 are variable frequency pumps.

[0046] Example 8: It differs from Examples 1 to 7 in that: as shown in the appendix Figure 1 As shown, a second regulating valve 26 is fixedly installed on the first heat transfer oil output pipeline 13 between the second heat transfer oil inlet pipeline 12 and the front-end converter, and a third regulating valve 27 is fixedly installed on the second heat transfer oil inlet pipeline 12.

[0047] Example 9: It differs from Examples 1 to 8 in that: as shown in the appendix Figure 1 As shown, the front-end converter and the back-end converter are equipped with a first temperature detector 28, a second temperature detector 29 and a third temperature detector 30, respectively, from top to bottom.

[0048] Example 10: It differs from Examples 1 to 9 in that, as shown in the appendix... Figure 1 As shown, it also includes a controller, and the first temperature detector 28, the second temperature detector 29, the third temperature detector 30, the first regulating valve 25, the second regulating valve 26 and the third regulating valve 27 are all electrically connected to the controller.

[0049] Depending on the requirements, the pipelines and equipment of this vinyl chloride converter unit, which uses a novel heat-removing medium based on a mercury-free catalyst, may also be equipped with conventional valves, thermometers, and pressure gauges known in the art, according to production needs. The controller is a PLC controller, and the PLC controller model can be GL-FJ-XL01. This PLC controller is equipped with a Yokogawa CS3000DCS control system.

[0050] This invention uses a PLC controller to monitor the bed temperature of the front-end converter and the back-end converter in real time. The PLC controller also uses the second regulating valve 26 and the third regulating valve 27 to adjust the flow rate of the circulating pump and the flow rate of the heat exchanger heat transfer oil in real time for precise temperature control. Furthermore, the first regulating valve 25 is used to adjust the flow rate of the heat transfer oil in different zones to achieve axial temperature gradient control.

[0051] Meanwhile, this utility model, by modifying the main structure of the existing non-pressure vessel type converter, only makes adaptive modifications to the inlet and outlet pipes and heat exchange system, which not only achieves efficient removal of the heat of reaction of gold-based catalyst, but also solves the limitation of the existing heptane heat removal requiring a pressure vessel, and reduces equipment modification costs and safety risks.

[0052] The above technical features constitute the embodiments of this utility model, which have strong adaptability and implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

[0053] The usage process of this utility model embodiment:

[0054] First, the mixed gas from premixer 1 is fed into a front-end converter equipped with a gold-based mercury-free catalyst for reaction. Then, the reaction gas is fed into a back-end converter equipped with a gold-based mercury-free catalyst to produce crude vinyl chloride (the front-end converter and the back-end converter can also be combined into one unit according to production needs).

[0055] Then, the crude vinyl chloride enters the crude vinyl chloride demister 6, and the heat released during the reaction is forcibly circulated through the heat transfer oil;

[0056] Next, the heat transfer oil from the front-end converter and the back-end converter first exchanges heat with the external hot water through the waste heat boiler 2;

[0057] Finally, the heat transfer oil after heat exchange enters the heat transfer oil storage tank 3 for recirculation before entering the front-end converter and the back-end converter. The hot water after heat exchange forms steam and is sent to the steam pipeline network for reuse through the flash tank 7.

Claims

1. A new heat removal medium for vinyl chloride converters applied to gold-based mercury-free catalysts, characterized by The system includes a premixer, a waste heat boiler, a thermal oil storage tank, a front-end converter, a back-end converter, a crude vinyl chloride demister, and a flash tank. A first mixed gas feed pipeline is fixedly connected between the top outlet of the premixer and the top inlet of the front-end converter. A second mixed gas feed pipeline is fixedly connected between the bottom outlet of the front-end converter and the top inlet of the back-end converter. A crude vinyl chloride delivery pipeline is fixedly connected between the outlet of the back-end converter and the inlet of the crude vinyl chloride demister. A first thermal oil inlet pipeline is fixedly connected between the bottom outlet of the thermal oil storage tank and the lower inlet of the front-end converter. The first thermal oil inlet pipeline is connected to the lower inlet of the back-end converter. A second heat transfer oil inlet pipeline is fixedly connected between the oil inlets and outlets. A first heat transfer oil outlet pipeline is fixedly connected between the upper oil outlet of the front-end converter and the top inlet of the waste heat boiler. A second heat transfer oil outlet pipeline is fixedly connected between the upper oil outlet of the back-end converter and the first heat transfer oil outlet pipeline. A heat transfer oil return pipeline is fixedly connected between the bottom oil outlet of the waste heat boiler and the top oil inlet of the heat transfer oil storage tank. A hot water inlet pipeline is fixedly connected between the lower water outlet of the flash tank and the top water inlet of the waste heat boiler. A steam outlet pipeline is fixedly connected between the top air outlet of the waste heat boiler and the upper air inlet of the flash tank. A steam to external network pipeline is fixedly connected to the top outlet of the flash tank.

2. The vinyl chloride converter device according to claim 1, applied to a novel heat-removing medium based on a gold-based mercury-free catalyst, is characterized in that the front end... The converter includes a first upper head, a first lower head, and a first housing. The first upper head, the first housing, and the first lower head are fixedly connected from top to bottom. The back-end converter includes a second upper head, a second lower head, and a second housing. The second upper head, the second housing, and the second lower head are fixedly connected from top to bottom. A first mixed gas supply pipeline is fixedly connected between the top outlet of the premixer and the inlet of the first upper head. A second mixed gas supply pipeline is fixedly connected between the outlet of the first lower head and the inlet of the second upper head. A crude vinyl chloride delivery pipeline is fixedly connected between the outlet of the second lower head and the inlet of the crude vinyl chloride demister.

3. The vinyl chloride converter apparatus applied to the new heat removal medium for gold-based mercury-free catalyst according to claim 2, characterized in that A first thermal oil inlet pipeline is fixedly connected between the bottom oil outlet of the thermal oil storage tank and the lower oil inlet of the first shell. A second thermal oil inlet pipeline is fixedly connected between the first thermal oil inlet pipeline and the lower oil inlet of the second shell. A first thermal oil outlet pipeline is fixedly connected between the upper oil outlet of the first shell and the top inlet of the waste heat boiler. A second thermal oil outlet pipeline is fixedly connected between the upper oil outlet of the second shell and the first thermal oil outlet pipeline.

4. The vinyl chloride converter apparatus applied to the new heat removal medium for gold-based mercury-free catalyst according to claim 3, characterized in that A first heat transfer circulation pump is fixedly installed on the first heat transfer oil inlet pipeline between the heat transfer oil storage tank and the second heat transfer oil inlet pipeline.

5. The vinyl chloride converter apparatus applied to the new heat removal medium for gold-based mercury-free catalysts according to claim 4, characterized in that A backup heat transfer oil inlet pipeline is fixedly connected between the first heat transfer oil inlet pipeline between the heat transfer oil storage tank and the first heat transfer circulation pump and the first heat transfer oil inlet pipeline between the first heat transfer circulation pump and the front-end converter. A second heat transfer circulation pump is fixedly installed on the backup heat transfer oil inlet pipeline.

6. The vinyl chloride converter device according to claim 4 or 5, applied to a novel heat-removing medium based on a gold-based mercury-free catalyst, is characterized in that... A heat transfer oil return pipeline is fixedly connected between the first heat transfer oil output pipeline and the waste heat boiler, and a first regulating valve is fixedly installed on the heat transfer oil return pipeline.

7. The vinyl chloride converter apparatus applied to the new heat removal medium for gold-based mercury-free catalyst according to claim 5, characterized in that Both the first and second heat transfer circulation pumps are variable frequency pumps.

8. The vinyl chloride converter apparatus for a new heat removal medium for gold-based mercury-free catalysts according to claim 1 or 2 or 3 or 4 or 5 or 7, characterized in that A second regulating valve is fixedly installed on the first heat transfer oil output pipeline between the second heat transfer oil inlet pipeline and the front-end converter, and a third regulating valve is fixedly installed on the second heat transfer oil inlet pipeline.

9. The vinyl chloride converter device according to claim 8, applied to a novel heat-removing medium based on a gold-based mercury-free catalyst, is characterized in that... Both the front-end converter and the back-end converter are equipped with a first temperature detector, a second temperature detector, and a third temperature detector, arranged sequentially from top to bottom.

10. The vinyl chloride converter apparatus for a new heat removal medium for gold-based mercury-free catalysts according to claim 9, characterized in that It also includes a controller, a first temperature detector, a second temperature detector, a third temperature detector, a second regulating valve, and a third regulating valve, all of which are electrically connected to the controller.

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