Shell-and-tube heat exchanger capable of automatically discharging liquid

Abstract

The utility model discloses a shell-and-tube heat exchanger capable of discharging liquid automatically, which belongs to the technical field of heat exchangers and is used for solving the problem that fluid in an inner tube of a heat exchanger in the prior art is not completely discharged. The shell-and-tube heat exchanger comprises a fluid cavity, a nitrogen supply cavity, a fluid valve, an emptying valve, an air inlet valve and an inner tube, the fluid cavity comprises a cavity body and a liquid adding hopper connected with the cavity body; the fluid valve is arranged on a fluid pipeline through which the cavity is connected with the inner pipe, the emptying valve is arranged on an emptying pipeline through which the nitrogen supply cavity is connected with the inner pipe, and the air inlet valve is arranged on an air inlet pipeline above the liquid level of the nitrogen supply cavity and the cavity; if the fluid valve is opened, the air inlet valve is opened and the emptying valve is closed; if the blowoff valve is open, the fluid valve is closed and the intake valve is closed. The heat exchanger can be used for fluid heat exchange.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat exchanger technical field, especially relate to a shell and tube heat exchanger of automatic liquid discharge. BACKGROUND

[0002] The shell and tube heat exchanger is made of two different standard pipes to form a concentric circle sleeve pipe, and two different temperature fluids (fluid and hot fluid) flow in the outer pipe and the inner pipe to achieve the heat exchange effect, in order to improve the heat exchange effect, the inner pipe is usually a curved pipe (for example, a serpentine pipe).

[0003] When the heat exchanger does not work, the fluid needs to be emptied, but for the curved pipe, the fluid usually remains, causing the pipe to corrode. INNOVATION CONTENT

[0004] In view of the above analysis, the utility model aims at providing a shell and tube heat exchanger of automatic liquid discharge to solve the problem of inner pipe corrosion caused by fluid residue after the curved inner pipe is emptied.

[0005] The utility model mainly aims at realizing the following technical schemes.

[0006] The utility model provides a shell and tube heat exchanger of automatic liquid discharge, including fluid cavity, nitrogen gas supply cavity, fluid valve, emptying valve, air inlet valve and inner pipe,

[0007] The fluid cavity includes a cavity and a liquid adding hopper connected with the cavity;

[0008] The fluid valve is arranged on the fluid pipe connecting the cavity and the inner pipe, the emptying valve is arranged on the emptying pipe connecting the nitrogen gas supply cavity and the inner pipe, and the air inlet valve is arranged on the air inlet pipe above the liquid level of the nitrogen gas supply cavity and the cavity; if the fluid valve is opened, the air inlet valve is opened and the emptying valve is closed; if the emptying valve is opened, the fluid valve is closed and the air inlet valve is closed.

[0009] Further, a pressure gauge for detecting the air pressure in the air inlet pipe is arranged on the air inlet pipe.

[0010] Further, a pipe vent valve for venting the air inlet pipe is arranged on the air inlet pipe.

[0011] Further, the fluid cavity further includes a liquid adding valve, and the liquid adding hopper is communicated with the inner cavity of the cavity through the liquid adding valve.

[0012] Further, the liquid adding hopper and the liquid adding valve are arranged on the top of the cavity.

[0013] Further, the fluid cavity further includes a cavity vent valve for venting the fluid cavity.

[0014] Further, the cavity vent valves are arranged on the top of the cavity.

[0015] Further, the emptying pipeline is provided with a nitrogen filter.

[0016] Further, the installation frame is detachably fixedly connected with the fluid cavity.

[0017] Further, the installation frame comprises an upper installation ring, a lower installation ring and a connecting rod, the upper installation ring and the lower installation ring are sleeved on the outer wall of the fluid cavity and are fixedly connected with the fluid cavity, and the upper installation ring is fixedly connected with the lower installation ring through the connecting rod.

[0018] Compared with the prior art, the automatic liquid-discharging tube-shell heat exchanger provided by the present application can at least realize one of the following beneficial effects:

[0019] A) The automatic liquid-discharging tube-shell heat exchanger provided by the present application is additionally provided with an emptying pipeline parallel to the fluid pipeline, when liquid needs to be injected, the fluid valve is opened, the emptying valve is closed, and the fluid in the fluid cavity is directly supplied into the inner tube; when the tube-shell heat exchanger needs to be emptied after heat exchange is completed, the emptying valve is opened, the fluid valve is closed, the nitrogen supply cavity is connected with the inner tube, nitrogen is supplied into the inner tube, so that the fluid in the inner tube is discharged, and emptying is completed. In this way, through nitrogen purging, the fluid can be forced to be completely discharged from the inner tube, the residual fluid is reduced, corrosion of the inner tube can be avoided, and the service life of the tube-shell heat exchanger as a whole can be improved.

[0020] B) The automatic liquid-discharging tube-shell heat exchanger provided by the present application can continuously supply nitrogen above the liquid surface of the fluid cavity during liquid injection, so that the air pressure in the fluid cavity can be kept in a normal state, and the influence of excessively low air pressure on the outflow of the fluid can be avoided.

[0021] In the present application, the above technical solutions can be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent specification, and some advantages can become apparent from the specification or can be understood through implementation of the present application. The purposes and other advantages of the present application can be realized and obtained through the contents specifically indicated in the specification examples and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0022] The drawings are only used for the purpose of illustrating specific embodiments and are not considered as limiting the present application, and in the whole drawings, the same reference signs represent the same parts.

[0023] Figure 1 Structure schematic view of the automatic liquid-discharging tube-shell heat exchanger provided by the present application embodiment one;

[0024] Figure 2 Structure schematic view of the fluid cavity in the automatic liquid-discharging tube-shell heat exchanger provided by the present application embodiment one.

[0025] Reference signs:

[0026] 1 - inner tube; 2 - fluid cavity; 201 - cavity; 202 - liquid adding hopper; 203 - liquid adding valve; 204 - cavity air release valve; 3 - fluid valve; 4 - nitrogen supply cavity; 5 - emptying valve; 6 - fluid pipeline; 7 - emptying pipeline; 8 - air inlet pipeline; 9 - filling pipeline; 10 - filling filter; 11 - upper mounting ring; 12 - lower mounting ring; 13 - connecting rod; 14 - liquid discharge pipeline; 15 - liquid discharge valve; 16 - air inlet valve; 17 - pressure gauge; 18 - pipeline air release valve; 19 - nitrogen filter. DETAILED DESCRIPTION

[0027] The preferred embodiments of the present application will be described in detail below with reference to the drawings, wherein the drawings constitute a part of the present application and serve to explain the principles of the present application together with the embodiments of the present application, but are not intended to limit the scope of the present application.

[0028] Embodiment one

[0029] The present embodiment provides a tube-shell heat exchanger capable of automatically discharging liquid, which comprises a fluid cavity 2, a nitrogen supply cavity 4, a fluid valve 3, an emptying valve 5 and an inner tube 1. Figure 1 As to the structure of the fluid cavity 2, specifically referring to Figure 2 , it comprises a cavity 201, a liquid adding hopper 202 and a liquid adding valve 203, the liquid adding hopper 202 is communicated with the inner cavity of the cavity 201 through the liquid adding valve 203, and the fluid is added into the cavity 201 through the liquid adding hopper 202.

[0030] The fluid valve 3 is arranged on the fluid pipeline 6 connecting the cavity 201 and the inner tube 1, and the emptying valve 5 is arranged on the emptying pipeline 7 connecting the nitrogen supply cavity 4 and the inner tube 1. If the fluid valve 3 is in the open state and the emptying valve 5 is in the closed state, the cavity 201 is communicated with the inner tube 1, and the nitrogen supply cavity 4 is disconnected with the inner tube 1; if the emptying valve 5 is in the open state and the fluid valve 3 is in the closed state, the nitrogen supply cavity 4 is communicated with the inner tube 1, and the cavity 201 is disconnected with the inner tube 1.

[0031] During liquid injection, the air pressure in the cavity 201 will gradually decrease as the fluid flows out of the cavity 201, which may affect the smooth flow of the fluid, therefore, the above-mentioned tube-shell heat exchanger capable of automatically discharging liquid further comprises an air inlet pipeline and an air inlet valve 16 arranged on the air inlet pipeline, the nitrogen supply cavity 4 is connected with the liquid surface of the cavity 201 through the air inlet pipeline, if the fluid valve 3 is in the open state and the air inlet valve 16 is in the open state, the nitrogen supply cavity 4 is communicated with the liquid surface of the cavity 201. In this way, during the liquid injection process, the nitrogen supply cavity 4 can continuously supply nitrogen to the liquid surface of the cavity 201, so as to ensure that the air pressure in the cavity 201 is in a normal state, and avoid that the low air pressure affects the flow of the fluid.

[0032] Compared with the prior art, the shell-and-tube heat exchanger provided by the embodiment can increase the emptying pipeline 7 parallel to the fluid pipeline 6, when liquid needs to be injected, the fluid valve 3 is opened, the emptying valve 5 is closed, and the fluid in the fluid cavity 2 is directly supplied into the inner tube 1; when the shell-and-tube heat exchanger is completed, the emptying valve 5 is opened, the fluid valve 3 is closed, the nitrogen supply cavity 4 is connected with the inner tube 1, and the nitrogen is supplied into the inner tube 1, so that the fluid in the inner tube 1 is discharged, and the emptying is completed. In this way, the nitrogen blowing can force the fluid to be completely discharged from the inner tube 1, reduce the residual fluid, and thus avoid the corrosion of the inner tube 1, and further improve the service life of the shell-and-tube heat exchanger as a whole.

[0033] In order to timely release the gas in the air inlet pipeline when the air pressure exceeds the threshold value, the air inlet pipeline is further provided with a pipeline release valve 18 for adjusting the air pressure in the air inlet pipeline.

[0034] Considering that the nitrogen supply cavity 4 continuously supplies nitrogen into the cavity 201, the overall air pressure of the shell-and-tube heat exchanger for automatic liquid discharge may be too large, therefore, the air inlet pipeline is further provided with a pressure gauge 17 for detecting the air pressure in the air inlet pipeline. In this way, the pressure gauge 17 can be used to detect the pressure of the air inlet pipeline in real time, so as to ensure that the air pressure in the air inlet pipeline and the air pressure in the fluid cavity 2 are within the threshold range.

[0035] Similarly, in order to timely release the gas in the cavity 201 when the air pressure exceeds the threshold value, the fluid cavity 2 further includes a cavity release valve 204 for adjusting the air pressure in the cavity 201.

[0036] Exemplarily, from the layout point of view, the liquid filling bucket 202, the liquid filling valve 203 and the cavity release valve 204 are all arranged at the top of the cavity 201.

[0037] In order to effectively filter the fluid supplied into the inner tube 1, and avoid impurities in the fluid flowing into the inner tube 1 to cause the inner tube 1 to be blocked, the shell-and-tube heat exchanger for automatic liquid discharge further includes a filling pipeline 9, the liquid outlet end of the fluid pipeline 6 and the discharge end of the emptying pipeline 7 are both connected with the inner tube 1 through the filling pipeline 9, and the filling pipeline 9 is provided with a filling filter 10, which can filter the impurities in the fluid to avoid blocking the inner tube 1.

[0038] Similarly, in order to filter the nitrogen gas flowing out of the nitrogen supply cavity 4, and avoid impurities in the nitrogen gas flowing into the emptying pipeline 7 to cause the emptying pipeline 7 to be blocked, the emptying pipeline 7 is provided with a nitrogen filter 19, which can filter the impurities in the nitrogen gas to avoid blocking the emptying pipeline 7.

[0039] In order to realize stable installation of the fluid cavity 2, the automatic draining tube-shell heat exchanger further comprises a mounting frame, and the fluid cavity 2 is detachably fixedly connected with the mounting frame, so as to ensure stable installation of the fluid cavity 2.

[0040] For the structure of the mounting frame, specifically, the mounting frame comprises an upper mounting ring 11, a lower mounting ring 12 and a connecting rod 13, the upper mounting ring 11 and the lower mounting ring 12 are sleeved on the outer wall of the fluid cavity 2 and are fixedly connected with the fluid cavity 2, the upper mounting ring 11 is located above the lower mounting ring 12, one end of the connecting rod 13 is fixedly connected with the upper mounting ring 11, and the other end of the connecting rod 13 is fixedly connected with the lower mounting ring 12, so as to form the mounting frame with the frame structure.

[0041] It can be understood that, after fluid filling, in order to facilitate drainage of the fluid in the fluid cavity 2, the automatic draining tube-shell heat exchanger further comprises a draining pipeline 14 communicated with the liquid outlet of the fluid valve 3 and a draining valve 15 arranged on the draining pipeline 14, so that when the fluid cavity 2 needs to be drained, the fluid valve 3 and the draining valve 15 are both opened, so that the fluid in the fluid cavity 2 can be timely drained.

[0042] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A shell-and-tube heat exchanger with automatic liquid drainage, characterized in that, The fluid cavity, the nitrogen supply cavity, the fluid valve, the emptying valve, the air inlet valve and the inner tube are included. The fluid cavity includes a cavity and a liquid adding funnel connected with the cavity. The fluid valve is arranged on a fluid pipeline connecting the cavity and the inner tube, the emptying valve is arranged on an emptying pipeline connecting the nitrogen supply cavity and the inner tube, and the air inlet valve is arranged on an air inlet pipeline above the liquid surface of the nitrogen supply cavity and the cavity.

2. The automatic drainable tube-in-shell heat exchanger of claim 1, wherein, If the fluid valve is opened, the air inlet valve is opened and the emptying valve is closed.

3. The self-draining tube-in-shell heat exchanger of claim 2, wherein, A pressure gauge is arranged on the air inlet pipeline to detect the air pressure in the air inlet pipeline.

4. The self-draining tube-in-shell heat exchanger of claim 1, wherein, A pipeline air release valve is arranged on the air inlet pipeline to release the air in the air inlet pipeline.

5. The self-draining tube-in-shell heat exchanger of claim 4, wherein, The fluid cavity further includes a liquid adding valve, and the liquid adding funnel is communicated with the inner cavity of the cavity through the liquid adding valve.

6. The self-draining tube-in-shell heat exchanger of claim 1, wherein, The liquid adding funnel and the liquid adding valve are arranged on the top of the cavity.

7. The self-draining tube-in-shell heat exchanger of claim 6, wherein, The fluid cavity further includes a cavity air release valve to release the air in the fluid cavity.

8. The self-draining tube-in-shell heat exchanger of claim 1, wherein, The cavity air release valve is arranged on the top of the cavity.

9. The self-draining tube-in-shell heat exchanger of claim 1, wherein, A nitrogen filter is arranged on the emptying pipeline.

10. The self-draining tube-in-shell heat exchanger of claim 9, wherein, A mounting frame is further included, and the fluid cavity is detachably fixedly connected with the mounting frame. The mounting frame includes an upper mounting ring, a lower mounting ring and a connecting rod. The upper mounting ring and the lower mounting ring are sleeved on the outer wall of the fluid cavity and fixedly connected with the fluid cavity, and the upper mounting ring is fixedly connected with the lower mounting ring through the connecting rod.

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