A n-butane evaporator

Abstract

This invention discloses a n-butane evaporator, relating to the technical field of evaporator equipment. It includes a first tank, a second tank, and heat exchange piping. The first tank has a first inlet at its bottom and a first outlet at its top. The second tank has a second inlet and a second outlet at its top, with a flow pipe connecting the first outlet and the second inlet. The heat exchange piping includes a first heat exchange flow path and a second heat exchange flow path that are interconnected. The first heat exchange flow path extends from the bottom into the first tank, extends upward, bends downward at a predetermined height, and exits from the bottom of the first tank. The second heat exchange flow path is wrapped around the outer wall of the flow pipe. The first end of the first heat exchange flow path is connected to a medium inlet, and the second end is connected to a medium outlet. The second tank is connected to a pressure system used to reduce the internal pressure of the second tank. This invention has the advantages of good evaporation effect and energy saving.

Description

Technical Field

[0001] This invention relates to the field of evaporator equipment technology, and specifically to a n-butane evaporator. Background Technology

[0002] n-Butane, mixed with propane, is widely used as liquefied petroleum gas for home heating, cooking, and industrial heating. It is also extensively used as a raw material in organic synthesis; for example, dehydrogenation produces butene and butadiene, isomerization produces isobutane, and catalytic oxidation produces maleic anhydride, acetic acid, and acetaldehyde. It is also used in organic synthesis and ethylene production, as a raw material for synthetic rubber and high-octane liquid fuels, as a household fuel, solvent, refrigerant, and for instrument calibration. One of the large pieces of equipment used in the synthesis and use of n-butane is the n-butane evaporator. The evaporator vaporizes the n-butane feedstock under low pressure and ambient or high temperature conditions, allowing it to participate in subsequent production processes. However, current evaporators have a simple structure and poor evaporation efficiency. To increase the evaporation rate, a large amount of energy is input, resulting in the evaporation of various components in the n-butane feedstock. The evaporated n-butane mixes with some components from the evaporated n-butane feedstock, affecting subsequent production processes. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention provides a n-butane evaporator.

[0004] A n-butane evaporator includes a first tank, a second tank, and heat exchange piping. The first tank has a first inlet at its bottom and a first outlet at its top. The second tank has a second inlet and a second outlet at its top. A flow pipe connects the first outlet and the second inlet. The heat exchange piping includes a first heat exchange path and a second heat exchange path that are interconnected. The first heat exchange path extends from the bottom into the first tank, extends upward, bends downward at a predetermined height, and exits from the bottom of the first tank. The second heat exchange path is wrapped around the outer wall of the flow pipe. The first end of the first heat exchange path is connected to a medium inlet, and the second end is connected to a medium outlet. The second tank is connected to a pressure system for reducing the internal pressure of the second tank. Water or other heat exchange media at temperatures above room temperature is introduced into the medium inlet and flows sequentially through the first heat exchange path, the second heat exchange path, and the medium outlet. In the entire evaporator, the first tank and the second tank are connected by a flow pipe. The first tank is fed with n-butane feedstock. Under the heat exchange action of the first heat exchange path, the heat exchange medium fully heats the first tank, causing the n-butane and other components with vaporization potential to absorb heat, boil, and vaporize, forming a vapor mass. This vapor mass is discharged from the first discharge port and enters the flow pipe. Due to the large amount of heat released by the heat exchange medium in the first heat exchange path, the temperature drops sharply. When the heat exchange medium flows into the second heat exchange path, the vapor mass temperature is higher than the heat exchange medium, allowing it to continue exchanging heat with the vapor mass in the flow pipe. This causes the vapor mass to release heat, and the components with higher boiling points in the vapor mass will directly condense. After the condensed liquid and vapor mass flow into the second tank, the pressure system keeps the second tank at low pressure, allowing the condensed liquid to continue vaporizing at room temperature, achieving secondary vaporization. This improves the vaporization quality of the n-butane and thus enhances the evaporation effect.

[0005] Preferably, the first heat exchange flow path includes a distribution box connected to the medium inlet and multiple flow pipes. The flow pipes extend from the bottom into the first tank, extend upwards, bend downwards at a predetermined height, and exit from the bottom of the first tank. The distribution box allows the heat exchange medium to flow into the multiple flow pipes separately, thereby increasing the heat exchange area of ​​the first heat exchange flow path and improving heat exchange efficiency and effect.

[0006] Preferably, a reinforcing plate is fixed inside the first tank, and the flow tube passes through the reinforcing plate. The reinforcing plate can improve the structural strength of multiple flow tubes.

[0007] Preferably, multiple reinforcing plates are provided. Similarly, the provision of multiple reinforcing plates can further improve the structural strength of multiple flow pipes.

[0008] Preferably, the second heat exchange flow path includes a heat exchange sleeve, the top and bottom of which are sealed, a flow pipe passing through the center of the heat exchange sleeve, the bottom of the heat exchange sleeve being connected to the flow pipe, and the top of the heat exchange sleeve being connected to the medium outlet. The heat exchange medium flows inside the heat exchange sleeve, thereby ensuring full contact with the outer wall of the flow pipe, improving the heat exchange effect and efficiency.

[0009] Preferably, an observation port is provided at the top of the first tank. The observation port allows for observation of the n-butane feedstock inside the first tank.

[0010] Preferably, a discharge pipe is connected to the bottom of the second tank. The discharge pipe allows the non-vaporizable fluid components in the second tank to be discharged.

[0011] Preferably, the bottom of the first tank is provided with a removable base plate, and the bottom surface of the removable base plate is provided with supporting flanges fixed to the first tank around its perimeter. The supporting flanges can be disassembled, allowing the removable base plate to be separated from the bottom of the first tank, thereby improving maintenance efficiency.

[0012] Preferably, a first regulating valve is provided between the first discharge port and the flow pipeline. The first regulating valve can adjust the opening and closing state of the first discharge port.

[0013] Preferably, a second regulating valve is provided between the second feed inlet and the flow pipeline. Similarly, the second regulating valve can adjust the opening and closing state of the second feed inlet.

[0014] The beneficial effects of this invention are reflected in:

[0015] In the entire evaporator of this invention, the first tank and the second tank are connected by a flow pipe. n-Butane feedstock is introduced into the first tank. Under the heat exchange action of the first heat exchange flow path, the heat exchange medium fully heats the first tank, causing n-butane and other components with vaporization conditions in the n-butane feedstock to absorb heat, boil, and vaporize, forming a vapor mass. The vapor mass is discharged from the first discharge port and enters the flow pipe. Due to the large amount of heat released by the heat exchange medium in the first heat exchange flow path, the temperature drops sharply. When the heat exchange medium flows into the second heat exchange flow path, because the temperature of the vapor mass is higher than that of the heat exchange medium, it can continue to exchange heat with the vapor mass in the flow pipe, causing the vapor mass to release heat. Components with higher boiling points in the vapor mass will directly condense. After the condensed liquid and vapor mass flow into the second tank, the pressure system keeps the second tank at low pressure, allowing the condensed liquid to continue vaporizing at room temperature, achieving secondary vaporization. This saves a significant amount of energy for secondary vaporization, thereby improving the vaporization quality of n-butane and thus improving the evaporation effect. Attached Figure Description

[0016] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention.

[0018] Figure label:

[0019] 1-First tank body, 11-First feed inlet, 12-First discharge outlet, 13-Reinforcing plate, 14-Observation port, 15-Removable bottom plate, 2-Second tank body, 21-Second feed inlet, 22-Second discharge outlet, 23-Discharge pipeline, 3-Flow pipeline, 4-Heat exchange pipeline, 41-First heat exchange flow path, 411-Diverter box, 412-Flow pipeline, 42-Second heat exchange flow path, 421-Heat exchange jacket, 43-Media input port, 44-Media output port, 5-Pressure system, 6-First regulating valve, 7-Second regulating valve. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0022] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0024] like Figure 1 As shown, a n-butane evaporator includes a first tank 1, a second tank 2, and a heat exchange pipeline 4. The bottom of the first tank 1 is connected to a first inlet 11, and the top of the first tank 1 is connected to a first outlet 12. The top of the second tank 2 is provided with a second inlet 21 and a second outlet 22. A flow pipeline 3 is provided between the first outlet 12 and the second inlet 21. The heat exchange pipeline 4 includes a first heat exchange flow path 41 and a second heat exchange flow path 42 that are connected to each other. The first heat exchange flow path 41 extends into the first tank 1 from the bottom, extends upward, bends downward at a preset height, and extends out from the bottom of the first tank 1. The second heat exchange flow path 42 is wrapped around the outer wall of the flow pipeline 3. The first end of the first heat exchange flow path 41 is connected to a medium inlet 43, and the second heat exchange flow path 42 is connected to a medium outlet 44. The second tank 2 is connected to a pressure system 5, which is used to reduce the internal pressure of the second tank 2.

[0025] In this embodiment, it should be noted that water or other heat exchange medium at a temperature higher than normal is introduced into the medium inlet 43, and flows sequentially through the first heat exchange path 41, the second heat exchange path 42 and the medium outlet 44. In the entire evaporator, the first tank 1 and the second tank 2 are connected by a flow pipe 3. n-Butane feedstock is introduced into the first tank 1. Under the heat exchange action of the first heat exchange flow path 41, the heat exchange medium fully heats the first tank 1, causing n-butane and other components with vaporization potential in the n-butane feedstock to absorb heat, boil, and vaporize, forming a vapor mass. The vapor mass is discharged from the first discharge port 12 and enters the flow pipe 3. Due to the large amount of heat released by the heat exchange medium in the first heat exchange flow path 41, the temperature drops sharply. When the heat exchange medium flows to the second heat exchange flow path 42, it can continue to exchange heat with the vapor mass in the flow pipe 3. Because the temperature of the vapor mass is higher than that of the heat exchange medium, the vapor mass releases heat, and the components with higher boiling points in the vapor mass will directly condense. After the condensed liquid and vapor mass flow into the second tank 2, the pressure system 5 keeps the second tank 2 at low pressure, allowing the condensed liquid to continue vaporizing at room temperature, achieving secondary vaporization, thereby improving the vaporization quality of n-butane and thus improving the evaporation effect.

[0026] Specifically, the first heat exchange flow path 41 includes a distribution box 411, which is connected to a medium inlet 43. The distribution box 411 is connected to multiple flow pipes 412, which extend from the bottom into the first tank 1, extend upward and bend downward at a preset height, and exit from the bottom of the first tank 1.

[0027] In this embodiment, it should be noted that the flow box 411 allows the heat exchange medium to flow into multiple flow pipes 412 respectively, thereby increasing the heat exchange area of ​​the first heat exchange flow path 41 and improving the heat exchange efficiency and heat exchange effect.

[0028] Specifically, a reinforcing plate 13 is fixed inside the first tank 1, and a flow pipe 412 passes through the reinforcing plate 13.

[0029] In this embodiment, it should be noted that the reinforcing plate 13 can improve the structural strength of the multiple flow pipes 412.

[0030] Specifically, multiple reinforcing plates 13 are provided.

[0031] In this embodiment, it should be noted that, similarly, the arrangement of multiple reinforcing plates 13 can further improve the structural strength of the multiple flow pipes 412.

[0032] Specifically, the second heat exchange flow path 42 includes a heat exchange sleeve 421, the top and bottom of the heat exchange sleeve 421 are sealed, a flow pipe 3 is passed through the center of the heat exchange sleeve 421, the bottom of the heat exchange sleeve 421 is connected to a flow pipe 412, and the top of the heat exchange sleeve 421 is connected to a medium outlet 44.

[0033] In this embodiment, it should be noted that the heat exchange medium flows inside the heat exchange sleeve 421, thereby fully contacting the outer wall of the flow pipe 3, improving the heat exchange effect and heat exchange efficiency.

[0034] Specifically, an observation port 14 is provided on the top of the first tank 1.

[0035] In this embodiment, it should be noted that the observation port 14 is capable of observing the n-butane raw material inside the first tank 1.

[0036] Specifically, the bottom of the second tank 2 is connected to a discharge pipe 23.

[0037] In this embodiment, it should be noted that the discharge pipe 23 can discharge the non-vaporizable fluid components in the second tank 2.

[0038] Specifically, a detachable bottom plate 15 is provided at the bottom of the first tank 1, and support flanges fixed to the first tank 1 are provided around the bottom surface of the detachable bottom plate 15.

[0039] In this embodiment, it should be noted that the support flange is detachable, allowing the removable base plate 15 to be separated from the bottom of the first tank body 1, thereby improving maintenance efficiency.

[0040] Specifically, a first regulating valve 6 is provided between the first discharge port 12 and the flow pipeline 3.

[0041] In this embodiment, it should be noted that the first regulating valve 6 can regulate the opening and closing state of the first discharge port 12.

[0042] Specifically, a second regulating valve 7 is provided between the second feed inlet 21 and the flow pipeline 3.

[0043] In this embodiment, it should be noted that, similarly, the second regulating valve 7 can regulate the opening and closing state of the second feed port 21.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A n-butane evaporator, characterized by The system includes a first tank, a second tank, and heat exchange piping. The first tank has a first inlet at its bottom and a first outlet at its top. The second tank has a second inlet and a second outlet at its top. A flow pipe connects the first outlet and the second inlet. The heat exchange pipeline includes a first heat exchange flow path and a second heat exchange flow path that are connected to each other. The first heat exchange flow path extends from the bottom into the first tank body, extends upward and bends downward at a preset height, and extends out from the bottom of the first tank body. The second heat exchange flow path is wrapped around the outer wall of the flow pipeline. The first end of the first heat exchange flow path is connected to a medium inlet, into which water at a temperature higher than room temperature is introduced. The second heat exchange flow path is connected to a medium outlet at its end. The second tank is connected to a pressure system, which is used to reduce the internal air pressure of the second tank.

2. The n-butane evaporator according to claim 1, characterized in that The first heat exchange flow path includes a flow distribution box, which is connected to the medium inlet. The flow distribution box is connected to multiple flow pipes, which extend from the bottom into the first tank, extend upward, bend downward at a preset height, and exit from the bottom of the first tank.

3. The n-butane evaporator of claim 2, wherein, A reinforcing plate is fixed inside the first tank, and the flow pipe passes through the reinforcing plate.

4. The n-butane evaporator of claim 3, wherein, Multiple reinforcing plates are provided.

5. The n-butane evaporator of claim 2, wherein, The second heat exchange flow path includes a heat exchange sleeve, the top and bottom of which are sealed, a flow pipe passing through the center of the heat exchange sleeve, the bottom of which is connected to the flow pipe, and the top of which is connected to the medium outlet.

6. The n-butane evaporator of claim 1, wherein, An observation port is provided on the top of the first tank.

7. The n-butane evaporator of claim 1, wherein, The bottom of the second tank is connected to a discharge pipe.

8. The n-butane evaporator of claim 1, wherein, The bottom of the first tank is provided with a detachable base plate, and the bottom surface of the detachable base plate is provided with supporting flanges fixed to the first tank.

9. The n-butane evaporator of claim 1, wherein, A first regulating valve is provided between the first discharge port and the flow pipeline.

10. The n-butane evaporator of claim 1, wherein, A second regulating valve is provided between the second feed inlet and the flow pipeline.

Images