Styrene storage tank cooling system

Abstract

The utility model discloses a styrene storage tank cooling system, relates to the technical field of styrene storage tank temperature control systems, and can utilize liquid nitrogen needing to be vaporized and stored to vaporize to absorb heat, cool a styrene storage tank, reduce the temperature of the styrene storage tank and improve the cooling efficiency. A styrene storage tank cooling system comprises a styrene storage tank, a styrene heat exchanger, a styrene cooling circulating water pipeline, a liquid nitrogen conversion pipeline and a water bath vaporization heat exchanger. Styrene in the styrene storage tank enters the styrene heat exchanger to be circulated, and the styrene cooling circulating water pipeline exchanges heat with the styrene through the styrene heat exchanger, so that the temperature of the styrene in the styrene storage tank is reduced. Heat can be absorbed when liquid nitrogen in the liquid nitrogen conversion pipeline is converted into nitrogen, heat exchange between the styrene cooling circulating water pipeline and the liquid nitrogen conversion pipeline is achieved through the water bath vaporization heat exchanger, the medium temperature in the styrene cooling circulating water pipeline is further reduced, and the cooling efficiency of the system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of styrene storage tank temperature control systems, in particular to a styrene storage tank cooling system. Background Art

[0002] Styrene undergoes a slow polymerization reaction at ambient temperature, and this process is exothermic. As heat accumulates and the temperature rises, the reaction rate accelerates, making "violent polymerization" more likely. Under storage conditions, styrene self-polymerizes slowly, but the rate accelerates with increasing temperature, significantly increasing inhibitor consumption and significantly shortening the storage life of styrene. Among the many factors that must be controlled during styrene storage, temperature is the most critical. Therefore, styrene storage tanks must be cooled and insulated to keep the styrene temperature low.

[0003] However, due to the influence of foreign styrene production and storage requirements and sea transportation, the unloading temperature of foreign styrene is usually high, about 29-31°C, which is higher than the current domestic styrene storage temperature requirements. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a styrene storage tank cooling system that can utilize the vaporization of liquid nitrogen that needs to be vaporized and stored to absorb heat, thereby cooling the styrene storage tank, reducing the temperature of the styrene storage tank, and improving the cooling efficiency.

[0005] The utility model provides a styrene storage tank cooling system, comprising a styrene storage tank, a styrene heat exchanger, a styrene cooling circulating water pipeline, a liquid nitrogen conversion pipeline and a water bath vaporization heat exchanger, wherein the styrene heat exchanger is connected to the styrene storage tank and is used to cool the styrene in the styrene storage tank, the styrene cooling circulating water pipeline is connected to the styrene heat exchanger and can exchange heat with the styrene heat exchanger, the liquid nitrogen conversion pipeline can reduce the temperature of the styrene cooling circulating water pipeline, and the water bath vaporization heat exchanger is arranged on the styrene cooling circulating water pipeline and the liquid nitrogen conversion pipeline, and can realize heat exchange between the liquid nitrogen conversion pipeline and the styrene cooling circulating water pipeline.

[0006] A styrene storage tank cooling system according to an embodiment of the present invention has at least the following beneficial effects: a styrene storage tank cooling system includes a styrene storage tank, a styrene heat exchanger, a styrene cooling circulating water pipeline, a liquid nitrogen conversion pipeline, and a water bath vaporization heat exchanger. The styrene heat exchanger is connected to the styrene storage tank. The styrene heat exchanger is used to cool the styrene in the styrene storage tank. The styrene cooling circulating water pipeline is connected to the styrene heat exchanger. The styrene cooling circulating water pipeline can exchange heat with the styrene heat exchanger. The liquid nitrogen conversion pipeline can reduce the temperature of the styrene cooling circulating water pipeline. The water bath vaporization heat exchanger is arranged on the styrene cooling circulating water pipeline and the liquid nitrogen conversion pipeline. The water bath vaporization heat exchanger can realize heat exchange between the liquid nitrogen conversion pipeline and the styrene cooling circulating water pipeline. The styrene in the styrene storage tank enters the styrene heat exchanger for circulation, and the styrene cooling circulating water pipeline exchanges heat with the styrene through the styrene heat exchanger, thereby reducing the temperature of the styrene in the styrene storage tank. When liquid nitrogen in the liquid nitrogen conversion pipeline is converted into nitrogen gas, it absorbs heat. A water bath vaporization heat exchanger is used to achieve heat exchange between the styrene cooling circulating water pipeline and the liquid nitrogen conversion pipeline. The heat absorbed during nitrogen conversion is used to further reduce the medium temperature in the styrene cooling circulating water pipeline, thereby improving the cooling efficiency of the system.

[0007] According to the styrene storage tank cooling system described in the utility model, the styrene cooling circulating water pipeline includes a chilled water circulation unit and a circulating water main, and the circulating water main is connected to the chilled water circulation unit and the styrene heat exchanger.

[0008] According to the styrene storage tank cooling system described in the utility model, the liquid nitrogen conversion pipeline includes a liquid nitrogen storage tank, a liquid nitrogen main pipe, a liquid nitrogen regulating valve, an air temperature vaporizer and a nitrogen storage tank. The two ends of the liquid nitrogen main pipe are respectively connected to the liquid nitrogen storage tank and the nitrogen storage tank. The liquid nitrogen regulating valve and the air temperature vaporizer are arranged on the liquid nitrogen main pipe.

[0009] According to the styrene storage tank cooling system described in the utility model, the styrene cooling circulating water pipeline also includes a liquid nitrogen cooling branch pipe, a pipeline pump and a circulation branch pipe regulating valve. One end of the liquid nitrogen cooling branch pipe is connected to the input end of the styrene heat exchanger, and the other end is connected to the output end of the styrene heat exchanger. The circulation branch pipe regulating valve, the water bath vaporization heat exchanger and the pipeline pump are sequentially arranged on the liquid nitrogen cooling branch pipe along the conveying direction of the liquid nitrogen cooling branch pipe, and the liquid nitrogen main pipe is connected to the water bath vaporization heat exchanger.

[0010] According to the styrene storage tank cooling system described in the utility model, the liquid nitrogen conversion pipeline also includes a temperature control branch pipe, one end of the temperature control branch pipe is connected to the output end of the liquid nitrogen storage tank, and the other end is connected to the input end of the air temperature vaporizer, and the temperature control branch pipe is provided with a temperature control regulating valve.

[0011] According to the styrene storage tank cooling system described in the utility model, the chilled water circulation unit is started when the medium temperature of the circulating water main is higher than 7 degrees Celsius.

[0012] According to the styrene storage tank cooling system described in the utility model, the liquid nitrogen cooling branch pipe is started when the medium temperature of the circulating water main pipe is higher than 5 degrees Celsius.

[0013] According to the styrene storage tank cooling system described in the utility model, the liquid nitrogen cooling branch pipe is closed when the medium temperature of the circulating water main pipe is lower than 3 degrees Celsius.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the pipeline of a preferred embodiment of the present utility model. DETAILED DESCRIPTION

[0017] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0018] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0019] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0020] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0021] Reference Figure 1 A styrene storage tank cooling system includes a styrene storage tank 10, a styrene heat exchanger 20, a styrene cooling circulating water pipeline 30, a liquid nitrogen conversion pipeline 40, and a water bath vaporization heat exchanger 50. The styrene heat exchanger 20 is connected to the styrene storage tank 10. The styrene heat exchanger 20 is used to cool the styrene in the styrene storage tank 10. The styrene cooling circulating water pipeline 30 is connected to the styrene heat exchanger 20. The styrene cooling circulating water pipeline 30 can exchange heat with the styrene heat exchanger 20. The liquid nitrogen conversion pipeline 40 can reduce the temperature of the styrene cooling circulating water pipeline 30. The water bath vaporization heat exchanger 50 is arranged on the styrene cooling circulating water pipeline 30 and the liquid nitrogen conversion pipeline 40. The water bath vaporization heat exchanger 50 can realize heat exchange between the liquid nitrogen conversion pipeline 40 and the styrene cooling circulating water pipeline 30.

[0022] It can be understood that the styrene in the styrene storage tank 10 enters the styrene heat exchanger 20 for circulation, and the styrene cooling circulating water pipeline 30 exchanges heat with the styrene through the styrene heat exchanger 20 to reduce the temperature of the styrene in the styrene storage tank 10.

[0023] Furthermore, liquid nitrogen in the liquid nitrogen conversion pipeline 40 absorbs heat when converted into nitrogen gas. A water bath vaporization heat exchanger 50 is used to achieve heat exchange between the styrene cooling circulating water pipeline 30 and the liquid nitrogen conversion pipeline 40. The heat absorbed during nitrogen gas conversion is utilized to further reduce the medium temperature in the styrene cooling circulating water pipeline 30, thereby improving the cooling efficiency of the system.

[0024] Reference Figure 1 The styrene cooling circulating water pipeline 30 includes a chilled water circulation unit 31 and a circulating water main 32. The circulating water main 32 connects the chilled water circulation unit 31 and the styrene heat exchanger 20.

[0025] It can be understood that in the embodiment of the present invention, the chilled water circulation unit 31 can cool the heat exchange medium and drive the heat exchange medium to flow in the circulating water main 32, so that the heat exchange medium flows through the styrene heat exchanger 20 to cool the styrene in the styrene storage tank 10.

[0026] Reference Figure 1The liquid nitrogen conversion pipeline 40 includes a liquid nitrogen storage tank 41, a liquid nitrogen main line 42, a liquid nitrogen regulating valve 43, an air temperature vaporizer 44, and a nitrogen storage tank 45. The two ends of the liquid nitrogen main line 42 are connected to the liquid nitrogen storage tank 41 and the nitrogen storage tank 45 respectively. The liquid nitrogen regulating valve 43 and the air temperature vaporizer 44 are installed on the liquid nitrogen main line 42.

[0027] It is understandable that the liquid nitrogen conversion pipeline 40 absorbs a large amount of heat when converting liquid nitrogen into nitrogen gas. This characteristic can be used to cool the styrene cooling circulating water pipeline 30 and increase the cooling efficiency of the styrene cooling circulating water pipeline 30.

[0028] Reference Figure 1 The styrene cooling water circulation pipeline 30 also includes a liquid nitrogen cooling branch pipe 33, a pipeline pump 34, and a circulation branch pipe regulating valve 35. One end of the liquid nitrogen cooling branch pipe 33 is connected to the input of the styrene heat exchanger 20, and the other end is connected to the output of the styrene heat exchanger 20. The circulation branch pipe regulating valve 35, a water bath vaporizing heat exchanger 50, and the pipeline pump 34 are sequentially arranged on the liquid nitrogen cooling branch pipe 33 along its conveying direction. The liquid nitrogen main pipe 42 is connected to the water bath vaporizing heat exchanger 50.

[0029] It can be understood that the pipeline pump 34 can drive the heat exchange medium to run in the liquid nitrogen cooling branch pipe 33. When the circulation branch pipe regulating valve 35 is opened, the heat exchange medium is output from the chilled water circulation unit 31 and enters the styrene heat exchanger 20. Part of the heat exchange medium output from the styrene heat exchanger 20 returns to the input end of the chilled water circulation unit 31, and the other part enters the liquid nitrogen cooling branch pipe 33. After being cooled by the water bath vaporization heat exchanger 50, it is driven by the pipeline pump 34 and merges with the heat exchange medium output from the chilled water circulation unit 31 and enters the styrene heat exchanger 20 again.

[0030] When the circulation branch regulating valve 35 is closed, the heat exchange medium is output from the chilled water circulation unit 31 and enters the styrene heat exchanger 20 , and then the heat exchange medium output from the styrene heat exchanger 20 returns to the input end of the chilled water circulation unit 31 .

[0031] It is worth noting that in the embodiment of the present invention, the liquid nitrogen cooling branch pipe 33 can also operate independently. When the circulation branch pipe regulating valve 35 is opened and the chilled water circulation unit 31 is closed, the heat exchange medium is cooled by the water bath vaporization heat exchanger 50 and then driven by the pipeline pump 34 to enter the styrene heat exchanger 20. The heat exchange medium flowing out of the styrene heat exchanger 20 passes through the water bath vaporization heat exchanger 50 and returns to the pipeline pump 34 to complete the cycle.

[0032] Reference Figure 1The liquid nitrogen conversion pipeline 40 further includes a temperature control branch pipe 46. One end of the temperature control branch pipe 46 is connected to the output end of the liquid nitrogen storage tank 41, and the other end is connected to the input end of the air temperature vaporizer 44. A temperature control regulating valve 47 is provided on the temperature control branch pipe 46.

[0033] It can be understood that when the temperature of styrene in the styrene storage tank 10 does not reach the threshold value and the liquid nitrogen conversion pipeline 40 is not needed for auxiliary cooling, the flow of liquid nitrogen in the temperature control branch pipe 46 can be controlled by adjusting the temperature control regulating valve 47 to achieve flow control of the liquid nitrogen main pipe 42 and regulate the heat exchange efficiency of the water bath vaporization heat exchanger 50.

[0034] It is worth noting that, in some embodiments of the present invention, the chilled water circulation unit 31 is started when the medium temperature of the circulating water main 32 is higher than 7 degrees Celsius.

[0035] It is worth noting that, in some embodiments of the present invention, the liquid nitrogen cooling branch pipe 33 is started when the medium temperature of the circulating water main pipe 32 is higher than 5 degrees Celsius.

[0036] It is worth noting that, in some embodiments of the present invention, the liquid nitrogen cooling branch pipe 33 is closed when the medium temperature of the circulating water main pipe 32 is lower than 3 degrees Celsius.

[0037] It is understandable that if the temperature of the styrene in the styrene storage tank 10 is lower than 3 degrees Celsius, there is no need to open the liquid nitrogen cooling branch pipe 33 and the chilled water circulation unit 31, thereby saving energy.

[0038] When the temperature of styrene in the styrene storage tank 10 is between 3 degrees Celsius and 7 degrees Celsius, it is only necessary to open the liquid nitrogen cooling branch pipe 33 to utilize the energy of liquid nitrogen vaporization, without opening the chilled water circulation unit 31, thereby saving energy.

[0039] If the temperature of styrene in the styrene storage tank 10 is higher than 7 degrees Celsius, the liquid nitrogen cooling branch pipe 33 and the chilled water circulation unit 31 are opened at the same time to quickly cool the styrene in the styrene storage tank 10 and improve the cooling efficiency.

[0040] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A styrene storage tank cooling system, characterized in that: include: A styrene storage tank (10), a styrene heat exchanger (20), a styrene cooling circulating water pipeline (30), a liquid nitrogen conversion pipeline (40), and a water bath vaporization heat exchanger (50). The styrene heat exchanger (20) is connected to the styrene storage tank (10) and is used to cool the styrene in the styrene storage tank (10). The styrene cooling circulating water pipeline (30) is connected to the styrene heat exchanger (20) and can exchange heat with the styrene heat exchanger (20). The liquid nitrogen conversion pipeline (40) can reduce the temperature of the styrene cooling circulating water pipeline (30). The water bath vaporization heat exchanger (50) is arranged on the styrene cooling circulating water pipeline (30) and the liquid nitrogen conversion pipeline (40). The water bath vaporization heat exchanger (50) can realize heat exchange between the liquid nitrogen conversion pipeline (40) and the styrene cooling circulating water pipeline (30).

2. A styrene storage tank cooling system according to claim 1, characterized in that: The styrene cooling circulating water pipeline (30) comprises a chilled water circulating unit (31) and a circulating water main (32), and the circulating water main (32) is connected to the chilled water circulating unit (31) and the styrene heat exchanger (20).

3. A styrene storage tank cooling system according to claim 2, characterized in that: The liquid nitrogen conversion pipeline (40) comprises a liquid nitrogen storage tank (41), a liquid nitrogen main pipe (42), a liquid nitrogen regulating valve (43), an air temperature vaporizer (44), and a nitrogen storage tank (45). The two ends of the liquid nitrogen main pipe (42) are respectively connected to the liquid nitrogen storage tank (41) and the nitrogen storage tank (45). The liquid nitrogen regulating valve (43) and the air temperature vaporizer (44) are arranged on the liquid nitrogen main pipe (42).

4. A styrene storage tank cooling system according to claim 3, characterized in that: The styrene cooling circulating water pipeline (30) further comprises a liquid nitrogen cooling branch pipe (33), a pipeline pump (34) and a circulation branch pipe regulating valve (35); one end of the liquid nitrogen cooling branch pipe (33) is connected to the input end of the styrene heat exchanger (20), and the other end is connected to the output end of the styrene heat exchanger (20); the circulation branch pipe regulating valve (35), the water bath vaporizing heat exchanger (50) and the pipeline pump (34) are sequentially arranged on the liquid nitrogen cooling branch pipe (33) along the conveying direction of the liquid nitrogen cooling branch pipe (33); and the liquid nitrogen main pipe (42) is connected to the water bath vaporizing heat exchanger (50).

5. A styrene storage tank cooling system according to claim 3, characterized in that: The liquid nitrogen conversion pipeline (40) further comprises a temperature control branch pipe (46), one end of which is connected to the output end of the liquid nitrogen storage tank (41), and the other end of which is connected to the input end of the air temperature vaporizer (44), and a temperature control regulating valve (47) is provided on the temperature control branch pipe (46).

6. A styrene storage tank cooling system according to claim 2, characterized in that: The chilled water circulation unit (31) is started when the medium temperature of the circulating water main (32) is higher than 7 degrees Celsius.

7. A styrene storage tank cooling system according to claim 4, characterized in that: The liquid nitrogen cooling branch pipe (33) is started when the medium temperature of the circulating water main pipe (32) is higher than 5 degrees Celsius.

8. A styrene storage tank cooling system according to claim 4, characterized in that: The liquid nitrogen cooling branch pipe (33) is closed when the medium temperature of the circulating water main pipe (32) is lower than 3 degrees Celsius.

Images