Thermal management system for chlor-alkali equipment

Abstract

The invention discloses a thermal management system for a chlor-alkali device, the chlor-alkali device comprises a rectification device, a hot water tank and a cold device, the first inlet and the first outlet of the hot water tank are connected to the rectification device through a circulation pipeline, the thermal management system comprises a converter and an absorption refrigerator; the hot water outlet of the converter is connected to the second inlet of the hot water tank through a first pipeline, the hot water inlet of the converter is connected to the second outlet of the hot water tank through a second pipeline; the generator of the absorption refrigerator is provided with a first hot water inlet and a first hot water outlet which are connected to each other, the first hot water inlet and the first hot water outlet are connected in series on the second pipeline, and the evaporator of the absorption refrigerator is connected to the cold device through a circulation pipeline. The thermal management system uses the hot water discharged from the converter to heat the distillation device and also to cool the cold device, so that the heat released by the converter can be fully utilized, thereby improving the thermal efficiency of the chlor-alkali device and reducing the operating cost of the chlor-alkali device.

Description

Technical Field

[0001] The invention relates to the technical field of chlor-alkali equipment, and in particular to a thermal management system of chlor-alkali equipment. Background Art

[0002] Chlor-alkali equipment includes distillation equipment, hot water tank, converter, cooling equipment and other components. The converter is also called a synthesis reactor, which will discharge high-temperature hot water during its operation. During the distillation process, it is necessary to ensure that the distillation equipment maintains the predetermined operating temperature.

[0003] The existing chlor-alkali equipment uses the converter to provide heat to the hot water tank, and the hot water tank to provide heat to the distillation device, so as to ensure that the distillation device maintains a predetermined operating temperature. At the same time, an electric refrigerator is used to provide cooling capacity to the cooling device. The existing chlor-alkali equipment has low thermal efficiency and high operating costs.

[0004] In view of this, how to improve the thermal efficiency of chlor-alkali equipment and reduce the operating cost of chlor-alkali equipment is a technical problem that technical personnel in this field need to solve. Summary of the invention

[0005] To solve the above technical problems, the present invention provides a thermal management system for a chlor-alkali equipment, the chlor-alkali equipment comprising a distillation device, a hot water tank and a cold-using device, the first inlet and the first outlet of the hot water tank being connected to the distillation device through a circulation pipeline, characterized in that the thermal management system comprises a converter and an absorption refrigerator; the hot water outlet of the converter is connected to the second inlet of the hot water tank through a first pipeline, and the hot water inlet of the converter is connected to the second outlet of the hot water tank through a second pipeline; the generator of the absorption refrigerator is provided with a first hot water inlet and a first hot water outlet which are connected to each other, the first hot water inlet and the first hot water outlet are connected in series on the second pipeline, and the evaporator of the absorption refrigerator is connected to the cold-using device through a circulation pipeline.

[0006] This thermal management system utilizes the hot water discharged from the converter to provide heat for the distillation device. At the same time, the hot water discharged from the converter is used as the refrigerant of the absorption refrigerator. The absorption refrigerator is used to replace the electric refrigerator to provide cooling for the refrigeration equipment, so that the heat released by the converter can be fully utilized, thereby improving the thermal efficiency of the chlor-alkali equipment and reducing the operating cost of the chlor-alkali equipment.

[0007] Optionally, the generator of the absorption refrigeration machine is further provided with a second hot water inlet and a second hot water outlet which are interconnected, and the second hot water inlet and the second hot water outlet are connected in series to the first pipeline.

[0008] Optionally, the hot water outlet and the hot water inlet of the converter are connected through a third pipeline, the third pipeline is connected in parallel with the hot water tank, and the generator of the absorption refrigeration machine is also provided with a second hot water inlet and a second hot water outlet that are connected to each other, and the second hot water inlet and the second hot water outlet are connected in series to the third pipeline.

[0009] Optionally, the third pipeline is connected to the hot water outlet of the converter through a partial section of the first pipeline, and the third pipeline is connected to the hot water inlet of the converter through a partial section of the second pipeline.

[0010] Optionally, the thermal management system further comprises a cooler, which is connected in series to a connecting pipe section between the first hot water outlet and the hot water inlet of the converter.

[0011] Optionally, a partition is provided in the hot water tank, which divides the hot water tank into a first chamber and a second chamber, and a gap is formed between the top surface of the partition and the top wall of the hot water tank, the first chamber and the second chamber are connected through the gap, the first inlet and the first outlet of the hot water tank are correspondingly arranged in the first chamber, and the second inlet and the second outlet of the hot water tank are correspondingly arranged in the second chamber.

[0012] Optionally, a bypass pipeline is provided between the interconnected hot water outlet and hot water inlet of the generator of the absorption refrigeration machine, and a regulating valve is provided on the bypass pipeline.

[0013] Optionally, the regulating valve is integrated inside the absorption refrigerator.

[0014] Optionally, the thermal management system further comprises a temperature sensor, and the temperature sensor is used to monitor the water temperature at the first outlet of the hot water tank.

[0015] Optionally, the regulating valve is an electric regulating valve, and the thermal management system also includes a controller, which is communicated with the temperature sensor and the electric regulating valve and is configured as follows: when the water temperature at the first outlet of the hot water tank is lower than a preset lower limit temperature, the controller automatically increases the opening of the electric regulating valve; when the water temperature at the first outlet of the hot water tank is higher than a preset upper limit temperature, the controller automatically decreases the opening of the electric regulating valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a first specific embodiment of a thermal management system for a chlor-alkali plant provided by the present invention;

[0017] Figure 2 A schematic diagram of a second specific embodiment of a thermal management system for a chlor-alkali plant provided by the present invention;

[0018] Figure 3A schematic diagram of a third specific embodiment of a thermal management system for a chlor-alkali plant provided by the present invention;

[0019] Figure 4 A schematic diagram of a fourth specific embodiment of a thermal management system for a chlor-alkali plant provided by the present invention;

[0020] Figure 5 A schematic diagram of a fifth specific embodiment of a thermal management system for a chlor-alkali plant provided by the present invention;

[0021] Figure 6 A schematic diagram of a sixth specific embodiment of a thermal management system for a chlor-alkali plant provided by the present invention;

[0022] The following are the descriptions of the reference numerals:

[0023] 1 distillation device, 2 hot water tank, 201 partition, 202 first chamber, 203 second chamber, 3 cooling device, 4 converter, 5 absorption refrigerator, a first hot water inlet, b first hot water outlet, c second hot water inlet, d second hot water outlet, 6 first pipeline, 7 second pipeline, 8 third pipeline, 9 regulating valve, 10 cooler, 11 temperature sensor. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0025] like Figure 1 As shown, the chlor-alkali equipment includes a distillation device 1. The distillation device 1 can only operate stably within a specific temperature range. Too high or too low a temperature is not conducive to the stable operation of the distillation device 1.

[0026] It also includes a hot water tank 2 , a first inlet and a first outlet of the hot water tank 2 are connected to the distillation device 1 through a circulation pipeline, so that the hot water tank 2 supplies heat to the distillation device 1 .

[0027] The heat management system is also included, and the heat management system includes a converter 4 and an absorption refrigerator 5. The converter 4 is used as a synthesis reactor, and high-temperature hot water is discharged during operation. The absorption refrigerator 5 is a common refrigeration equipment, which can be a lithium bromide absorption refrigerator or an ammonia absorption refrigerator. The absorption refrigerator 5 includes components such as an evaporator, a condenser, a generator and an absorber.

[0028] As shown in the figure, the hot water outlet of the converter 4 is connected to the second inlet of the hot water tank 2 through the first pipeline 6, and the hot water inlet of the converter 4 is connected to the second outlet of the hot water tank 2 through the second pipeline 7, so that the hot water discharged from the converter 4 flows through the hot water tank 2 and then returns to the converter 4, so that the converter 4 provides heat to the hot water tank 2. In the figure, the first pipeline 6 and the second pipeline 7 are both provided with a delivery pump.

[0029] like Figure 1 As shown, the generator of the absorption refrigerator 5 is provided with a first hot water inlet a and a first hot water outlet b which are interconnected. The first hot water inlet a and the first hot water outlet b are connected in series on the second pipeline 7, so that the hot water flows through the hot water tank 2 and then flows through the generator of the absorption refrigerator 5 and then returns to the converter 4, and the hot water discharged from the converter 4 is used as the refrigerant of the absorption refrigerator 5. The evaporator of the absorption refrigerator 5 is connected with the refrigerant inlet and the refrigerant outlet of the cold-using device 3 through a circulation pipeline, so that the absorption refrigerator provides cold capacity to the cold-using device 3. Cooling water is introduced into the condenser and absorber of the absorption refrigerator 5.

[0030] As configured above, the hot water discharged from the converter 4 provides heat for the distillation device, and at the same time, the hot water discharged from the converter 4 also provides cooling for the cooling device 3, so that the heat released by the converter 4 can be fully utilized, thereby improving the thermal efficiency of the chlor-alkali equipment. In the past, the chlor-alkali equipment used an electric refrigerator to provide cooling for the cooling device 3. In comparison, the present application uses the hot water discharged from the converter 4 as the refrigerant of the absorption refrigerator 5, and uses the absorption refrigerator 5 to replace the electric refrigerator to provide cooling for the cooling device, which greatly reduces the operating cost of the chlor-alkali equipment.

[0031] Specifically, a partition 201 is provided in the hot water tank 2, and the partition 201 divides the hot water tank 2 into a first chamber 202 and a second chamber 203. A gap is formed between the top surface of the partition 201 and the top wall of the hot water tank 2, and the first chamber 202 and the second chamber 203 are interconnected through the gap. The first inlet and the second outlet are correspondingly provided in the first chamber 202, and the second inlet and the second outlet are correspondingly provided in the second chamber 203. Usually, the temperature of the hot water discharged from the converter 4 is higher than the temperature required for the stable operation of the distillation device 1. By arranging the hot water tank 2 in this way, the water temperature in the first chamber 202 can be lower than the water temperature in the second chamber 203, and the low-temperature hot water in the first chamber 202 is used to heat the distillation device 1, which is conducive to the stable operation of the distillation device 1.

[0032] Figure 2 Program and Figure 3 Program and Figure 1 One difference of the solution is that the generator of the absorption refrigeration machine 5 is also provided with a second hot water inlet c and a second hot water outlet d.

[0033] Figure 2 In the embodiment, the second hot water inlet c and the second hot water outlet d are connected in series to the first pipeline 6. In this arrangement, the hot water discharged from the converter 4 first flows through the absorption refrigerator 5 and then flows through the hot water tank 2 to provide heat for the distillation device 1. Since the hot water is cooled to a certain extent when flowing through the absorption refrigerator 5, the problem that the hot water temperature exceeds the required operating temperature of the distillation device 1 can be alleviated to a certain extent.

[0034] Figure 3 In the embodiment, the hot water outlet of the converter 4 is connected to the hot water inlet through the third pipeline 8. Specifically, the third pipeline 8 is connected to the hot water outlet of the converter 4 through a part of the first pipeline 6, and the third pipeline 8 is connected to the hot water inlet of the converter 4 through a part of the second pipeline 7. That is to say, the third pipeline 8 shares a part of the first pipeline 6 and a part of the second pipeline 7. A delivery pump is provided on the third pipeline 8. The third pipeline 8 is connected in parallel with the hot water tank 2, and the second hot water inlet c and the second hot water outlet d are connected in series to the third pipeline 8. In this way, the hot water discharged from the converter 4 is divided into two paths. The first path first flows through the hot water tank 2 and then flows through the generator of the absorption refrigeration machine 5. The second path directly flows through the generator of the absorption refrigeration machine 5 without flowing through the hot water tank 2. Finally, both paths return to the converter 4. Since the diversion reduces the amount of hot water flowing through the hot water tank 2, the heat supply to the hot water tank 2 is reduced, thereby alleviating the problem that the hot water temperature exceeds the required operating temperature of the rectification device 1 to a certain extent.

[0035] Further, such as Figure 4 , Figure 5 and Figure 6 As shown, the thermal management system further includes a cooler 10, Figure 4 , Figure 5 , Figure 6 Compared Figure 1 , Figure 2 , Figure 3 The difference between the two is that an additional cooler 10 is provided, and the other structures are the same.

[0036] The cooler 10 is provided with a heat medium inlet and a heat medium outlet which are interconnected. The heat medium inlet and the heat medium outlet are connected in series to the connecting pipe section of the first hot water outlet b of the absorption refrigerator 5 and the hot water inlet of the converter 4. In the cooler 10, the hot water and the cooling water exchange heat, and the cooling water takes away the heat of the hot water. With such an arrangement, once the absorption refrigerator 5 fails or is under maintenance, the cooler 10 can cool down the hot water. During normal operation, the absorption refrigerator 5 and the cooler 10 can also be operated in coordination to reduce the load of the absorption refrigerator 5.

[0037] Further, such as Figure 1-Figure 6As shown, a bypass pipeline is provided between the interconnected hot water outlet and hot water inlet of the generator of the absorption refrigeration machine 5, and a regulating valve 9 is provided on the bypass pipeline. In the figure, a bypass pipeline is respectively connected between the first hot water inlet a and the second hot water outlet d, and between the second hot water inlet c and the second refrigeration outlet. With this arrangement, the hot water is divided into two paths after being discharged from the hot water tank 2. The first path first flows through the generator of the absorption refrigeration machine 5 and then returns to the converter 4. The second path directly returns to the converter 4 without flowing through the generator of the absorption refrigeration machine 5. By adjusting the opening of the regulating valve 9 on the bypass pipeline, the amount of hot water flowing through the generator of the absorption refrigeration machine 5 can be changed, thereby changing the heat supply to the hot water tank 2.

[0038] In the figure, the regulating valve 9 is integrated in the absorption refrigerator 5. In addition, the absorption refrigerator 5 can also be integrated with a delivery pump and a softened water replenisher.

[0039] Furthermore, the thermal management system further comprises a temperature sensor, which is used to monitor the water temperature at the first outlet of the hot water tank 2. In this way, the opening of the regulating valve 9 can be reasonably adjusted according to the water temperature at the first outlet of the hot water tank 2.

[0040] Furthermore, the thermal management system further includes a controller (not shown in the figure), in which a lower limit temperature and an upper limit temperature are preset, and the preset lower limit temperature and the preset upper limit temperature can be flexibly set according to actual needs, and the preset lower limit temperature can be 89° C. The regulating valve 9 is an electric regulating valve, and the controller is connected in communication with the temperature sensor and the electric regulating valve to automatically adjust the opening of the electric regulating valve according to the detection signal of the temperature sensor to realize automatic control.

[0041] The specific control process is as follows: when the judgment unit of the controller judges that the water temperature at the first outlet of the hot water tank 2 is lower than the preset lower limit temperature, the command module of the controller sends a control signal for increasing the opening to the electric regulating valve 9. When the judgment unit of the controller judges that the water temperature at the first outlet of the hot water tank 2 is higher than the preset upper limit temperature, the command module of the controller sends a control signal for decreasing the opening to the electric regulating valve 9.

[0042] The above is a detailed introduction to the thermal management system of the chlor-alkali equipment provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A thermal management system for a chlor-alkali equipment, the chlor-alkali equipment comprising a distillation device (1), a hot water tank (2) and a cooling device (3), wherein a first inlet and a first outlet of the hot water tank (2) are connected to the distillation device (1) through a circulation pipeline, characterized in that: The thermal management system comprises a converter (4) and an absorption refrigeration machine (5); the hot water outlet of the converter (4) is connected to the second inlet of the hot water tank (2) through a first pipeline (6), and the hot water inlet of the converter (4) is connected to the second outlet of the hot water tank (2) through a second pipeline (7); the generator of the absorption refrigeration machine (5) is provided with a first hot water inlet (a) and a first hot water outlet (b) which are connected to each other, the first hot water inlet (a) and the first hot water outlet (b) are connected in series to the second pipeline (7), and the evaporator of the absorption refrigeration machine (5) is connected to the cold-using device (3) through a circulation pipeline.

2. The thermal management system according to claim 1, characterized in that: The generator of the absorption refrigeration machine (5) is also provided with a second hot water inlet (c) and a second hot water outlet (d) which are interconnected, and the second hot water inlet (c) and the second hot water outlet (d) are connected in series to the first pipeline (6).

3. The thermal management system according to claim 1, characterized in that: The hot water outlet and the hot water inlet of the converter (4) are connected via a third pipeline (8), and the third pipeline (8) is connected in parallel with the hot water tank (2). The generator of the absorption refrigeration machine (5) is also provided with a second hot water inlet (c) and a second hot water outlet (d) which are connected to each other, and the second hot water inlet (c) and the second hot water outlet (d) are connected in series to the third pipeline (8).

4. The thermal management system according to claim 3, characterized in that: The third pipeline (8) is connected to the hot water outlet of the converter (4) through a partial section of the first pipeline (6), and the third pipeline (8) is connected to the hot water inlet of the converter (4) through a partial section of the second pipeline (7).

5. The thermal management system according to any one of claims 1 to 4, characterized in that: The thermal management system further comprises a cooler (10), which is connected in series to a connecting pipe section between the first hot water outlet (b) and the hot water inlet of the converter (4).

6. The thermal management system according to any one of claims 1 to 4, characterized in that: A partition (201) is provided inside the hot water tank (2), and the partition (201) divides the hot water tank (2) into a first chamber (202) and a second chamber (203); a gap is formed between the top surface of the partition (201) and the top wall of the hot water tank (2); the first chamber (202) and the second chamber (203) are connected via the gap; a first inlet and a first outlet of the hot water tank (2) are correspondingly arranged in the first chamber (202), and a second inlet and a second outlet of the hot water tank (2) are correspondingly arranged in the second chamber (203).

7. The thermal management system according to any one of claims 1 to 4, characterized in that: A bypass pipeline is provided between the hot water outlet and the hot water inlet of the generator of the absorption refrigeration machine (5), which are connected to each other, and a regulating valve (9) is provided on the bypass pipeline.

8. The thermal management system according to claim 7, characterized in that: The regulating valve (9) is integrated inside the absorption refrigeration machine (5).

9. The thermal management system according to claim 7, characterized in that: The thermal management system further comprises a temperature sensor, which is used to monitor the water temperature at the first outlet of the hot water tank (2).

10. The thermal management system according to claim 9, characterized in that: The regulating valve (9) is an electric regulating valve. The thermal management system further comprises a controller, which is in communication with the temperature sensor and the electric regulating valve and is configured such that: when the water temperature at the first outlet of the hot water tank (2) is lower than a preset lower limit temperature, the controller automatically increases the opening of the electric regulating valve; when the water temperature is higher than a preset upper limit temperature, the controller automatically decreases the opening of the electric regulating valve.

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