Tetrafluoroethylene production waste heat recycling system

Abstract

The utility model discloses a tetrafluoroethylene production waste heat recycling system, which relates to the technical field of waste heat recovery, and comprises a water storage tank, the water storage tank comprises a water inlet and a water outlet, the water outlet is connected with at least one first production device, the first production device is connected with a condenser, the condenser is connected with at least one reboiler, and the reboiler is connected with a second production device. The reboiler is connected with a second production device and is connected with the water inlet; according to the tetrafluoroethylene production waste heat recycling system, hot water by-produced by a condenser in a tetrafluoroethylene device serves as a heating source of a reboiler in hexafluoropropylene production, waste heat generated in the production process is efficiently recycled and utilized, the energy utilization efficiency is improved, use of steam and circulating water is reduced, the production cost is reduced, and the tetrafluoroethylene production waste heat recycling system is suitable for industrial production. Meanwhile, the influence on the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery, in particular to a waste heat recovery and utilization system for tetrafluoroethylene production. Background Art

[0002] In current chemical production, hexafluoropropylene production typically relies on efficient separation in distillation towers, where the reboiler consumes large amounts of steam to maintain the vaporization cycle of the material within the tower. Traditionally, the reboiler in hexafluoropropylene distillation towers is heated with 0.3MPa steam. This high steam consumption not only increases production costs, but also increases energy consumption and carbon emissions.

[0003] At the same time, during the Teflon production process on the same production line or within a chemical park, the graphite condenser, after efficient condensation, produces a large amount of hot water at around 50°C as a byproduct. This hot water is not only used by the Teflon plant itself, but also often leaves a significant surplus. Under traditional treatment methods, this excess hot water is typically cooled through a circulating water system and then directly discharged, resulting in energy waste and potential environmental thermal pollution risks. Utility Model Content

[0004] The purpose of the utility model is to provide a tetrafluoroethylene production waste heat recovery and utilization system. The tetrafluoroethylene production waste heat recovery and utilization system uses the hot water produced as a by-product of the condenser in the tetrafluoroethylene device as a heating source for the reboiler in the hexafluoropropylene production, thereby realizing efficient recovery and utilization of the waste heat generated in the production process, improving energy utilization efficiency, reducing the use of steam and circulating water, reducing production costs, and reducing the impact on the environment.

[0005] The above-mentioned optimized structure of the present invention is achieved through the following technical solutions: a tetrafluoroethylene production waste heat recovery and utilization system, comprising a water storage tank, the water storage tank comprising a water inlet and a water outlet, the water outlet being connected to at least one first production device, the first production device being connected to a condenser, the condenser being connected to at least one reboiler, the reboiler being connected to a second production device, and the reboiler being connected to the water inlet.

[0006] In some embodiments, the condenser is connected to a first three-way valve, one side of the first three-way valve is connected to the reboiler, and a heating device is connected between the other side of the first three-way valve and the reboiler.

[0007] In some embodiments, the first three-way valve is an electromagnetic three-way valve.

[0008] In some embodiments, a temperature measuring device is connected between the condenser and the three-way valve.

[0009] In some embodiments, a second three-way valve is connected between the condenser and the first three-way valve, and a cooler is connected between the second three-way valve and the water outlet.

[0010] In some embodiments, the first production device is a tetrafluoroethylene production device, and the second production device is a hexafluoropropylene distillation tower.

[0011] In some embodiments, the reboiler includes a liquid inlet, a liquid outlet, a fluid inlet, and a fluid outlet, the second production device is connected between the liquid inlet and the liquid outlet, the fluid inlet is connected to the condenser, and the fluid outlet is connected to the water inlet.

[0012] In some embodiments, the condenser is a graphite condenser.

[0013] In some embodiments, a control system is further included, and the control system is electrically connected to the temperature measuring device, the first three-way valve, and the heating device.

[0014] In summary, the present invention has the following beneficial effects:

[0015] The utility model connects the condenser in the tetrafluoroethylene device with the reboiler in the hexafluoropropylene production, and passes the hot water produced as a by-product in the condenser into the reboiler to serve as a heat source for vaporization in the reboiler, thereby realizing efficient recovery and utilization of waste heat in the tetrafluoroethylene production process, improving energy utilization efficiency, reducing the use of steam and circulating water, lowering production costs, and reducing thermal pollution to the environment.

[0016] The utility model arranges a first three-way valve, a second three-way valve and a heating device between the condenser and the reboiler, so that when tetrafluoroethylene production is stopped, the water storage tank is directly connected to the heating device to ensure the normal operation of the reboiler.

[0017] The utility model provides a temperature measuring device between the condenser and the reboiler, and electrically connects the temperature measuring device with the first three-way valve and the heating device, so as to measure the temperature of the by-product hot water of the condenser. When the temperature of the by-product hot water does not meet the standard, the heating device is started to heat the by-product hot water so that it meets the temperature requirement of the reboiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of the present utility model.

[0019] In the figure: 1. Water storage tank; 2. Condenser; 3. Reboiler; 4. Heating device; 5. Cooler; 6. First three-way valve; 7. Second three-way valve. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] Example 1:

[0022] refer to Figure 1 A tetrafluoroethylene production waste heat recovery and utilization system includes a water storage tank 1, which stores cold water. The water storage tank 1 includes a water inlet and a water outlet. The water outlet is connected to at least one first production device. A delivery pump is connected between the water outlet and the first production device to provide power for the cold water in the water storage tank 1 to flow into the first production device. The first production device is a tetrafluoroethylene production device. The tetrafluoroethylene production device is a prior art and will not be described here. The first production device is connected to a condenser 2, which can be a graphite condenser, which can cool and liquefy the high-temperature gas in the tetrafluoroethylene production process, and release a large amount of heat energy as a by-product of hot water.

[0023] The condenser 2 is connected to at least one reboiler 3, which is connected to a second production unit. The second production unit is a hexafluoropropylene distillation tower. The hexafluoropropylene distillation tower is a prior art and will not be described in detail here. The reboiler 3 is used to provide heat energy to maintain the vaporization cycle of the material in the tower. The reboiler 3 receives the hot water produced as a by-product of the condenser 2 and acts as a heat source for the vaporization of the reboiler, thereby achieving efficient recovery and utilization of waste heat in the tetrafluoroethylene production process, improving energy efficiency, reducing or even avoiding the use of steam and circulating water, reducing production costs, and reducing thermal pollution to the environment. The reboiler 3 is connected to the water inlet and collects the cooled by-product hot water in the water storage tank 1, forming a recycled by-product hot water, further improving energy efficiency.

[0024] In some embodiments, the condenser 2 is connected to a first three-way valve 6, which is used to control the flow direction of the by-product hot water of the condenser 2. One side of the first three-way valve 6 is connected to the reboiler 3 for introducing hot water into the reboiler for heat energy exchange; a heating device 4 is connected between the other side of the first three-way valve 6 and the reboiler 3 as a backup heat source path. The heating device 4 can be a hot water heater. When the temperature of the by-product hot water of the condenser 2 is not sufficient to meet the vaporization demand of the reboiler 3, the by-product hot water can be heated before entering the reboiler 3 to ensure the normal operation of the reboiler 3, thereby ensuring the stability of the hexafluoropropylene production process.

[0025] In some embodiments, the first three-way valve 6 may be an electromagnetic three-way valve, which can switch the flow direction of hot water according to a control signal to increase the switching speed.

[0026] In some embodiments, a temperature measuring device is connected between the condenser 2 and the three-way valve. The temperature measuring device may be a wireless thermometer for monitoring the temperature of the hot water produced by the condenser 2 in real time.

[0027] In some embodiments, the reboiler 3 includes a liquid inlet, a liquid outlet, a fluid inlet, and a fluid outlet, a second production device is connected between the liquid inlet and the liquid outlet, the fluid inlet is connected to the condenser 2, and the fluid outlet is connected to the water inlet to form a closed-loop circulation system.

[0028] In some embodiments, a control system is also included, which is electrically connected to the temperature measuring device, the first three-way valve 6, and the heating device 4. The control system automatically adjusts the working status of the first three-way valve 6 and the heating device 4 according to the data feedback from the temperature measuring device to ensure stable operation of the system and maximize the recovery and utilization of thermal energy.

[0029] Specifically, when the temperature measuring device measures that the temperature of the by-product hot water of condenser 2 meets the standard, the first three-way valve 6 directly connects the condenser 2 with the reboiler 3; when the temperature measuring device measures that the temperature of the by-product hot water of condenser 2 does not meet the standard, the first three-way valve 6 connects the condenser 2 with the heating device 4, and then connects it with the reboiler 3. At the same time, the heating device 4 is started to heat the by-product hot water flowing through so that it reaches the vaporization temperature of the reboiler 3.

[0030] The specific working principle is as follows:

[0031] During the tetrafluoroethylene production process, cold water from water tank 1 enters condenser 2, where it undergoes heat exchange with the hot gas entering condenser 2, producing hot water as a byproduct. A temperature measuring device monitors the hot water temperature in real time and transmits the signal to the control system. Based on the hot water temperature, the control system determines whether to activate heating device 4.

[0032] If the hot water temperature is high enough, the hot water is directly introduced into the reboiler 3 through the first three-way valve 6 to provide heat energy for the hexafluoropropylene distillation tower; if the hot water temperature is insufficient, the heating device 4 is turned on for auxiliary heating, and the hot water enters the reboiler 3 after being heated.

[0033] After the heat energy exchange, the by-product hot water in the reboiler 3 is cooled and turned into cold water, which is returned to the water inlet of the water storage tank 1 through the fluid outlet, forming a closed-loop circulation to achieve continuous recovery and utilization of waste heat.

[0034] Example 2:

[0035] The difference from Example 1 is that:

[0036] A second three-way valve 7 is connected between the condenser 2 and the first three-way valve 6 , and a cooler 5 is connected between the second three-way valve 7 and the water outlet. The cooler 5 is prior art and will not be described in detail here.

[0037] When the production of hexafluoropropylene is stopped, the second three-way valve 7 connects the condenser 2 to the water inlet through the cooler 5, and the by-product hot water is directly cooled by the cooler 5 and flows into the water storage tank 1, thereby realizing the recycling of the by-product hot water.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A system for recovering waste heat from tetrafluoroethylene production, characterized by: The invention comprises a water storage tank (1), wherein the water storage tank (1) comprises a water inlet and a water outlet, wherein the water outlet is connected to at least one first production device, wherein the first production device is connected to a condenser (2), wherein the condenser (2) is connected to at least one reboiler (3), wherein the reboiler (3) is connected to a second production device, and wherein the reboiler (3) is connected to the water inlet.

2. The tetrafluoroethylene production waste heat recovery system according to claim 1, characterized in that: The condenser (2) is connected to a first three-way valve (6), one side of the first three-way valve (6) is connected to the reboiler (3), and a heating device (4) is connected between the other side of the first three-way valve (6) and the reboiler (3).

3. The tetrafluoroethylene production waste heat recovery system according to claim 2, characterized in that: The first three-way valve (6) is an electromagnetic three-way valve.

4. The tetrafluoroethylene production waste heat recovery system according to claim 3, characterized in that: A temperature measuring device is connected between the condenser (2) and the three-way valve.

5. The tetrafluoroethylene production waste heat recovery system according to claim 2, characterized in that: A second three-way valve (7) is connected between the condenser (2) and the first three-way valve (6), and a cooler (5) is connected between the second three-way valve (7) and the water outlet.

6. The tetrafluoroethylene production waste heat recovery system according to claim 1, characterized in that: The first production device is a tetrafluoroethylene production device, and the second production device is a hexafluoropropylene distillation tower.

7. The tetrafluoroethylene production waste heat recovery system according to claim 1, characterized in that: The reboiler (3) includes a liquid inlet, a liquid outlet, a fluid inlet, and a fluid outlet. The second production device is connected between the liquid inlet and the liquid outlet. The fluid inlet is connected to the condenser (2), and the fluid outlet is connected to the water inlet.

8. The tetrafluoroethylene production waste heat recovery system according to claim 1, characterized in that: The condenser (2) is a graphite condenser.

9. The tetrafluoroethylene production waste heat recovery system according to claim 4, characterized in that: It also includes a control system, which is electrically connected to the temperature measuring device, the first three-way valve (6), and the heating device (4).

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