Liquid feeding device for horizontal flash tank

Abstract

The utility model belongs to the technical field of chemical equipment, and relates to a liquid feeding device for a horizontal flash drum, which is characterized by comprising a liquid feeding pipe component fixed on a drum body of the flash drum and a liquid distribution tank component fixed inside the flash drum, a liquid feeding pipe of the liquid feeding pipe assembly penetrates through the flash tank barrel and is fixed on the flash tank barrel, a flange is arranged at one end, outside the flash tank, of the liquid feeding pipe, and one end, extending into the flash tank, of the liquid feeding pipe is connected with a horn mouth; the liquid distribution tank assembly comprises a conical tank body and supporting channel steel, the two ends of the supporting channel steel are fixedly connected with the flash tank barrel, and the conical tank body is fixed to the supporting channel steel; and the horn mouth is suspended on the conical groove body. The flash tank is reasonable in design, simple in structure and capable of effectively avoiding the problems that high-pressure large-flow liquid directly washes the tank body, corrosivity of the liquid to the tank body is increased, and even the flash tank vibrates. The retention time of the liquid is prolonged, and gas-liquid entrainment caused by insufficient flash evaporation of the solution in the gas-liquid separation process is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical equipment and relates to a liquid feeding device, more specifically to a liquid feeding device for a horizontal flash tank. Background Art

[0002] Flash tank is a commonly used gas-liquid separation equipment in chemical production. Its working principle is that high-pressure liquid or gas-liquid mixture mixed with gas suddenly enters the low-pressure flash tank. Due to the sudden drop in pressure, the boiling point of the liquid also decreases, causing the liquid to flash and separate into low-pressure liquid and gas. Usually, the liquid is discharged from the bottom of the tank to form a product, and the gas is separated from the flash tank, thereby achieving gas-liquid separation and liquefaction, cooling and purification of the mixture. For horizontal flash tanks, the existing structure is mostly that the liquid directly enters the tank from the top. This structure will firstly lead to insufficient flash evaporation of the liquid during the gas-liquid separation process, resulting in gas-liquid entrainment; secondly, the high-pressure and large-flow liquid directly flushes the tank body, increasing the corrosiveness of the liquid to the tank body, and also causing vibration of the flash tank and other problems, reducing the service life of the flash tank body. Based on the above reasons, it is necessary to improve the structure of the liquid feed pipe. Summary of the invention

[0003] The utility model aims to provide a liquid feeding device for a horizontal flash tank, so as to solve the technical problems mentioned in the background technology mentioned above, such as insufficient gas-liquid flash evaporation and reduced service life of the flash tank body caused by direct feeding of liquid from the top of the horizontal flash tank.

[0004] The utility model is mainly solved by the following technical solutions:

[0005] A liquid feeding device for a horizontal flash tank, characterized in that it comprises a liquid feeding pipe assembly fixed on the flash tank cylinder and a liquid distribution tank assembly fixed inside the flash tank; the liquid feeding pipe of the liquid feeding pipe assembly passes through the flash tank cylinder and is fixed on the flash tank cylinder, the liquid feeding pipe is provided with a flange at one end outside the flash tank, and the end extending into the flash tank is connected to a bell mouth; the liquid distribution tank assembly comprises a conical tank body and a supporting channel steel, the two ends of the supporting channel steel are fixedly connected to the flash tank cylinder, and the conical tank body is fixed on the supporting channel steel; the bell mouth is suspended on the conical tank body.

[0006] Preferably, the large opening of the bell mouth is opposite to the large opening of the conical trough body.

[0007] Preferably, the extended length of the liquid feed pipe is determined according to the insulation thickness of the equipment, and is more preferably 150-250 mm.

[0008] Preferably, the length of the liquid feed pipe extending into the flash tank is equal to the outer diameter of the liquid feed pipe.

[0009] Preferably, the flare cone angle α is 90°.

[0010] Preferably, the depth of the bell mouth is 1 to 1.5 times the outer diameter of the liquid feed pipe.

[0011] Preferably, the diameter of the bottom plate of the conical trough body is 2 to 3 times the outer diameter of the liquid feed pipe.

[0012] Preferably, the cone angle β of the conical trough body is 60°.

[0013] When the horizontal flash tank of the utility model is adopted, liquid enters through the liquid feed pipe during feeding, flows into the liquid distribution tank through the bell mouth, and then overflows into the horizontal flash tank, which can ensure that the liquid is fully flashed and achieve the purpose of gas-liquid separation.

[0014] In the utility model, the spacing of the supporting channel steels can be determined by the designer according to the size of the tapered groove.

[0015] The depth of the conical tank in the utility model can be determined by the designer according to the calculation of the liquid flow rate.

[0016] The connection of the components in the utility model can be fixed by welding.

[0017] Beneficial technical effects of the utility model:

[0018] The utility model provides a liquid feeding device for a horizontal flash tank, which has a reasonable design and a simple structure. Compared with the prior art, the horizontal flash tank can effectively avoid problems such as high-pressure and high-flow liquid directly flushing the tank body, increasing the corrosiveness of the liquid to the tank body, and even causing vibration of the flash tank by setting an inner-extending liquid feeding pipe; by setting a liquid distribution tank component, the residence time of the liquid is increased, and gas-liquid entrainment due to insufficient flash evaporation of the solution during gas-liquid separation is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of a liquid feeding device for a horizontal flash tank according to an embodiment of the utility model.

[0020] Figure 2 for Figure 1 Center A view.

[0021] In the figure, 1-connecting flange, 2-liquid feed pipe, 3-bell mouth, 4-liquid distribution trough, 5-support channel steel. DETAILED DESCRIPTION

[0022] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods. Example

[0023] The structure of the liquid feeding device for the horizontal flash tank is as follows: Figure 1 and Figure 2 As shown, it mainly includes a connecting flange 1, a liquid feed pipe 2, a bell mouth 3, a liquid distribution trough 4, and a supporting channel steel 5.

[0024] A hole is opened at the feed port position on the top of the horizontal flash tank, and a liquid feed pipe is welded. A connecting flange 1 is welded on one end outside the flash tank for connecting with an external process pipeline, and one end extending into the flash tank is connected with a bell mouth 3.

[0025] The liquid distribution tank assembly fixed inside the flash tank includes a liquid distribution tank 4 and a supporting channel steel 5. Both ends of the supporting channel steel 5 are welded to the flash tank cylinder. The liquid distribution tank 4 is a conical tank body, which is placed on the supporting channel steel 5 and welded to it.

[0026] In the embodiment, the large opening of the bell mouth 3 is opposite to the large opening of the conical trough body and is suspended on the conical trough body.

[0027] The extension length of the liquid feed pipe 2 is determined according to the insulation thickness of the equipment, which is 150-250 mm; the length of the liquid feed pipe 2 extending into the flash tank is equal to the outer diameter of the liquid feed pipe 2.

[0028] The cone angle α of the bell mouth 3 is 90°; the depth of the bell mouth 3 is 1 to 1.5 times the outer diameter of the liquid feed pipe.

[0029] The diameter of the bottom plate of the conical tank body is 2 to 3 times the outer diameter of the liquid feed pipe 2; the cone angle β of the conical tank body is 60°.

[0030] In the embodiment, the spacing of the supporting channel steels 5 can be determined by the designer according to the size of the tapered groove; the depth of the tapered groove body can be determined by the designer according to the liquid flow calculation.

[0031] When the horizontal flash tank is fed, the liquid enters through the liquid feed pipe 2, flows into the liquid distribution tank 4 through the bell mouth 3, and then overflows into the horizontal flash tank, which can ensure that the liquid is fully flashed to achieve the purpose of gas-liquid separation.

[0032] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A liquid feeding device for a horizontal flash tank, characterized in that It includes a liquid feed pipe assembly fixed on the flash tank cylinder and a liquid distribution tank assembly fixed inside the flash tank; the liquid feed pipe of the liquid feed pipe assembly passes through the flash tank cylinder and is fixed on the flash tank cylinder, the liquid feed pipe is provided with a flange at one end outside the flash tank, and the end extending into the flash tank is connected to a bell mouth; the liquid distribution tank assembly includes a conical tank body and a supporting channel steel, the two ends of the supporting channel steel are fixedly connected to the flash tank cylinder, and the conical tank body is fixed on the supporting channel steel; the bell mouth is suspended on the conical tank body.

2. The liquid feeding device for a horizontal flash tank according to claim 1, characterized in that The extension length of the liquid feed pipe is determined according to the insulation thickness of the equipment.

3. The liquid feeding device for a horizontal flash tank as claimed in claim 2, characterized in that The extension length of the liquid feed pipe is 150~250mm.

4. The liquid feeding device for a horizontal flash tank according to claim 1, characterized in that The large opening of the bell mouth is opposite to the large opening of the conical trough body.

5. The liquid feeding device for a horizontal flash tank according to claim 1, characterized in that The length of the liquid feed pipe extending into the flash tank is equal to the outer diameter of the liquid feed pipe.

6. The liquid feeding device for a horizontal flash tank according to claim 1 or 4, characterized in that The cone angle α of the flare is 90°.

7. The liquid feeding device for a horizontal flash tank according to claim 6, characterized in that The depth of the bell mouth is 1 to 1.5 times the outer diameter of the liquid feed pipe.

8. The liquid feeding device for a horizontal flash tank according to claim 1 or 4, characterized in that The diameter of the bottom plate of the conical tank is 2 to 3 times the outer diameter of the liquid feed pipe.

9. The liquid feeding device for a horizontal flash tank according to claim 8, characterized in that The cone angle β of the conical tank body is 60°.

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