A gas pipeline demister

Abstract

The present invention relates to a gas pipeline demister, which is arranged in a horizontal pipe section of the gas pipeline; it comprises an inlet ring plate, an outlet ring plate, a demister plate, a distance plate, a cleaning device and a liquid discharge device; the inlet ring plate and the outlet ring plate are arranged in the gas pipeline at a certain distance, the inlet ring plate is correspondingly arranged at one end of the gas inlet, and the outlet ring plate is correspondingly arranged at one end of the gas outlet; a plurality of demister plates are arranged between the inlet ring plate and the outlet ring plate, and each demister plate is arranged along the gas flow direction; a distance plate is respectively set on the inlet ring plate and the outlet ring plate, and both ends of the demister plate are connected to the distance plate and are evenly arranged through the distance plate; a cleaning device is arranged on the gas pipeline above the demister plate, and a liquid discharge device is arranged on the gas pipeline below the demister plate. The demister of the present invention can effectively remove the mist droplets entrained in the gas, and has the advantages of small resistance, simple structure and convenient cleaning.

Description

Technical Field

[0001] The invention relates to the technical field of coal gas purification, and in particular to a coal gas pipeline demister. Background Art

[0002] During the gas purification process, the gas contains droplets (such as desulfurization liquid in the gas after the desulfurization tower, and washing oil in the gas after the benzene washing tower), which affects the operation of the subsequent process. In the prior art, a cyclone plate mist collector or a labyrinth mist collector is often used to remove the droplets in the gas, but in actual operation, it is found that there is a large resistance phenomenon, which affects the operation of the entire system. Summary of the invention

[0003] The invention provides a gas pipeline demister, which can effectively remove mist droplets entrained in the gas and has the advantages of small resistance, simple structure and convenient cleaning.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A gas pipeline demister is arranged in a horizontal pipe section of the gas pipeline; it comprises an inlet ring plate, an outlet ring plate, a demister plate, a distance plate, a cleaning device and a liquid discharge device; the inlet ring plate and the outlet ring plate are arranged in the gas pipeline at a certain distance, the inlet ring plate is correspondingly arranged at one end of the gas inlet, and the outlet ring plate is correspondingly arranged at one end of the gas outlet; a plurality of demister plates are arranged between the inlet ring plate and the outlet ring plate, and each demister plate is arranged along the gas flow direction; distance plates are respectively arranged on the inlet ring plate and the outlet ring plate, and both ends of the demister plates are connected to the distance plates and are evenly arranged through the distance plates; a cleaning device is arranged on the gas pipeline above the demister plate, and a liquid discharge device is arranged on the gas pipeline below the demister plate.

[0006] The demisting plate is composed of two arc plates, two straight plates and two fins. A fin is folded outward from the middle of the arc plate. The two arc plates are arranged opposite to each other and connected end to end. The outer ends of the two arc plates are connected to the straight plates. The straight plates are respectively clamped in the spacing grooves on the corresponding end spacing plates. There is a smooth transition between the straight plate and the arc plate, and between the arc plates.

[0007] The fins are arranged obliquely, and the tips of the fins are all directed toward one end of the gas inlet.

[0008] The outer diameters of the inlet ring plate and the outlet ring plate match the inner diameter of the gas pipeline; the distance plate is arranged in the middle of the inlet ring plate and the outlet ring plate along the radial direction of the gas pipeline; the inlet ring plate and the inner wall of the gas pipeline, the outlet ring plate and the inner wall of the gas pipeline are welded and fixed; the inlet ring plate, the outlet ring plate and the corresponding distance plates are welded and fixed; the straight plate on the demisting plate is welded and fixed to the corresponding end distance plate and the corresponding parts of the inlet ring plate and the outlet ring plate.

[0009] The cleaning device consists of a cleaning liquid inlet pipe, an inlet flange and a cleaning liquid spray pipe; the cleaning liquid inlet pipe is arranged at the top of the gas pipeline, and the top of the cleaning liquid inlet pipe is provided with an inlet flange for connecting to an external cleaning liquid pipeline; the cleaning liquid spray pipe is an arc-shaped pipe, and the two ends of the arc-shaped pipe extend to the two sides of the gas pipeline respectively; a plurality of spray holes are arranged at the bottom of the cleaning liquid spray pipe, and the middle part of the cleaning liquid spray pipe is connected to the lower end of the cleaning liquid inlet pipe.

[0010] The spray holes are arranged in multiple groups along the length of the cleaning liquid spray pipe, and each group of spray holes consists of three spray holes arranged on the same cross section; the three spray holes are arranged radially, and the middle spray hole is arranged vertically; a top notch is arranged on the top of the defogger plate corresponding to the installation position of the cleaning liquid spray pipe.

[0011] The liquid discharge device consists of a liquid collecting hopper, a liquid discharge pipe and an outlet flange; a bottom notch is provided at the bottom of the demister plate, a long hole is provided at the bottom of the gas pipeline below the demister plate, a liquid collecting hopper is provided on the outside of the gas pipeline at the corresponding position, a liquid discharge pipe is provided at the bottom of the liquid collecting hopper, and an outlet flange is provided at the bottom of the liquid discharge pipe for connecting to an external gas liquid sealing tank.

[0012] The liquid collecting hopper is composed of two end plates and two inclined plates. The two inclined plates are symmetrically arranged with the axis of the gas pipeline as the symmetry axis. The two ends of the two inclined plates are connected by the end plates at the corresponding ends. The top of the inclined plate and the top of the end plate are welded and fixed to the gas pipeline respectively; the bottom of the liquid collecting hopper is provided with an opening connected to the drain pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1) It is installed in the horizontal section of the gas pipeline. After the gas enters the mist collector in the horizontal direction, it passes through multiple demister plates. Fins are provided on the demister plates. Under the action of centrifugal force, the captured liquid gathers at the fins, and then flows to the bottom of the gas pipeline under the action of gravity and is discharged through the drainage device. The multiple demister plates are arranged along the gas flow direction, with small resistance.

[0015] 2) The cleaning structure is simple, easy to clean, and not easy to be blocked;

[0016] 3) The liquid collected by the drainage device and the cleaned liquid are uniformly discharged into the gas liquid seal tank, which is safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of a gas pipeline demister according to the present invention.

[0018] Figure 2 yes Figure 1 AA view in.

[0019] Figure 3 It is a partial structural schematic diagram of the distance plate described in the present invention.

[0020] Figure 4 It is a schematic cross-sectional view of the demister plate of the present invention.

[0021] Figure 5 yes Figure 4 Front view of.

[0022] Figure 6 It is a structural schematic diagram of the cleaning device of the present invention.

[0023] Figure 7 It is a schematic cross-sectional view of the cleaning spray pipe of the present invention.

[0024] Figure 8 It is a schematic structural diagram of the liquid discharge device of the present invention.

[0025] In the figure: 1. Gas pipeline 11. Long hole 21. Inlet ring plate 22. Outlet ring plate 3. Demisting plate 31. Curved plate 32. Fin 33. Straight plate 34. Top notch 35. Bottom notch 4. Distance plate 41. Distance groove 5. Cleaning device 51. Cleaning liquid inlet pipe 52. Inlet flange 53. Cleaning liquid spray pipe 54. Spray hole 6. Drainage device 61. Liquid collecting bucket 62. Drainage pipe 63. Outlet flange DETAILED DESCRIPTION

[0026] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0027] like Figure 1 , Figure 2 As shown, a gas pipeline demister of the present invention is arranged in a horizontal pipe section of a gas pipeline 1; it comprises an inlet ring plate 21, an outlet ring plate 22, a demister plate 3, a distance plate 4, a cleaning device 5 and a liquid discharge device 6; the inlet ring plate 21 and the outlet ring plate 22 are arranged in the gas pipeline 1 at a distance, the inlet ring plate 21 is correspondingly arranged at one end of the gas inlet, and the outlet ring plate 22 is correspondingly arranged at one end of the gas outlet; a plurality of demister plates 3 are arranged between the inlet ring plate 21 and the outlet ring plate 22, and each demister plate 3 is arranged along the gas flow direction; distance plates 4 are respectively set on the inlet ring plate 21 and the outlet ring plate 22, and both ends of the demister plates 3 are connected to the distance plates 4 and are evenly spaced through the distance plates 4; a cleaning device 5 is arranged on the gas pipeline 1 above the demister plates 3, and a liquid discharge device 6 is arranged on the gas pipeline 1 below the demister plates 3.

[0028] like Figure 4 , Figure 5As shown, the demisting plate 3 is composed of two arc plates 31, two straight plates 33 and two fins 32. The middle part of the arc plate 31 is folded outward to form a fin 32. The two arc plates 31 are arranged opposite to each other and connected end to end. The outer ends of the two arc plates 31 are connected to the straight plates 33; the straight plates 33 are respectively clamped in the spacing grooves 41 on the corresponding end spacing plates 4 (as shown in FIG. Figure 3 There is a smooth transition between the straight plate 33 and the curved plate 31, and between the curved plates 31 and the curved plates 31.

[0029] The fins 32 are arranged obliquely, and the tips of the fins 32 are all facing the gas inlet end.

[0030] The outer diameters of the inlet ring plate 21 and the outlet ring plate 22 match the inner diameter of the gas pipeline 1; the distance plate 4 is arranged at the middle of the inlet ring plate 21 and the outlet ring plate 22 along the radial direction of the gas pipeline 1; the inlet ring plate 21 and the inner wall of the gas pipeline 1, and the outlet ring plate 22 and the inner wall of the gas pipeline 1 are welded and fixed; the inlet ring plate 21, the outlet ring plate 22 and the corresponding distance plate 3 are welded and fixed; the straight plate 33 on the defogger plate 3 is welded and fixed to the corresponding end distance plate 3 and the corresponding parts of the inlet ring plate 21 and the outlet ring plate 22.

[0031] like Figure 6 As shown, the cleaning device 5 consists of a cleaning liquid inlet pipe 51, an inlet flange 52 and a cleaning liquid spraying pipe 53; the cleaning liquid inlet pipe 51 is arranged at the top of the gas pipeline 1, and the top of the cleaning liquid inlet pipe 51 is provided with an inlet flange 52 for connecting an external cleaning liquid pipeline; the cleaning liquid spraying pipe 53 is an arc-shaped pipe, and both ends of the arc-shaped pipe extend to both sides of the gas pipeline 1 respectively; a plurality of spraying holes 54 are arranged at the bottom of the cleaning liquid spraying pipe 53, and the middle part of the cleaning liquid spraying pipe 53 is connected to the lower end of the cleaning liquid inlet pipe 51.

[0032] The spray holes 54 are arranged in multiple groups along the length of the cleaning liquid spray pipe 53, and each group of spray holes is composed of three spray holes 54 arranged on the same cross section; Figure 7 As shown, the three spray holes 54 are all arranged radially, and the middle spray hole 54 is arranged vertically; a top notch 34 is arranged on the top of the demister plate 3 corresponding to the installation position of the cleaning liquid spray pipe 53.

[0033] like Figure 8 As shown, the drainage device 6 consists of a liquid collecting hopper 61, a drainage pipe 62 and an outlet flange 63; a bottom notch 35 is provided at the bottom of the demister plate 3, a long hole 11 is provided at the bottom of the gas pipeline 1 below the demister plate 3, a liquid collecting hopper 61 is provided on the outside of the gas pipeline 1 at the corresponding position, a drainage pipe 62 is provided at the bottom of the liquid collecting hopper 61, and an outlet flange 63 is provided at the bottom of the drainage pipe 62 for connecting to an external gas liquid sealing tank.

[0034] The liquid collecting hopper 61 is composed of two end plates and two inclined plates. The two inclined plates are symmetrically arranged with the axis of the gas pipeline 1 as the symmetry axis. The two ends of the two inclined plates are connected by the end plates at the corresponding ends, and the top of the inclined plate and the top of the end plate are welded and fixed to the gas pipeline 1 respectively; the bottom of the liquid collecting hopper 61 is provided with an opening connected to the drain pipe 62.

[0035] The demister of the present invention is installed in the horizontal pipe section of the gas pipeline 1, and the main functional component is the demister plate 3. The demister plate 3 is formed by bending a flat plate, and its main shape is composed of two arc plates 31 connected end to end (the connection is smooth transition), the middle part of the arc plate 31 is bent outward to form a fin 32, and the tip of the fin 32 is facing the gas inlet direction; a straight plate 33 is provided at the outer end of the arc plate 31; a top notch 34 is provided in the middle position of the top of the demister plate 3 for arranging the cleaning liquid spray pipe 53 in the cleaning device 5, and a bottom notch 35 is provided in the middle position of the bottom of the demister plate 3 as a liquid channel.

[0036] The distance plate 4 is made of steel plate, and a plurality of distance grooves 41 are longitudinally provided on the distance plate 4 . The spacing of the distance grooves 41 is the spacing of the defogger plates 3 . Notches are provided at both ends of the distance plate 4 and are welded and fixed to the inlet ring plate 21 or the outlet ring plate 22 .

[0037] The cleaning device 5 is used to spray the cleaning liquid evenly onto each demister plate 3 .

[0038] The liquid discharge device 6 is used to discharge the liquid collected from the coal gas in the gas pipeline 1 and the liquid sprayed during cleaning.

[0039] The installation process of the gas pipeline demister of the present invention is as follows: a long hole 11 is opened at the bottom of the gas pipeline 1, and a cleaning device 5 is installed on the top; then a demister plate is installed; first, an inlet ring plate 21 is welded, and a corresponding distance plate 4 is welded thereon, and then the demister plate 3 is installed, and the demister plate 3 is welded and fixed to the inlet ring plate 21 and the corresponding distance plate 4 in sequence, and then the distance plate 4 and the outlet ring plate 22 are installed on the outlet ring plate 22, and the demister plate 3 is welded and fixed to the outlet ring plate 22 and the corresponding distance plate 4 in sequence. Finally, the drainage device 6 is welded.

[0040] The operation process of the gas pipeline demister described in the present invention is as follows: the gas enters the mist collector from one end of the inlet ring plate 21 in the horizontal direction, and flows between each demister plate 3. Since the demister plate 3 is provided with fins 32, under the action of centrifugal force, the liquid captured by the demister plate 3 is gathered at the fins 32, and the liquid droplets flow downward to the bottom of the gas pipeline 1 under the action of gravity. The liquid discharge device 6 discharges the collected liquid into the gas liquid seal tank. When the gas resistance increases due to the deposition of impurities at the fins 32, the cleaning device 5 is turned on to spray the cleaning liquid to wash the deposits on the demister plate 3, which can reduce the gas resistance.

[0041] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A gas pipeline demister, arranged in a horizontal pipe section of a gas pipeline; characterized in that: It comprises an inlet ring plate, an outlet ring plate, a demister plate, a distance plate, a cleaning device and a drain device; the inlet ring plate and the outlet ring plate are arranged in the gas pipeline at a certain distance, the inlet ring plate is correspondingly arranged at one end of the gas inlet, and the outlet ring plate is correspondingly arranged at one end of the gas outlet; a plurality of demister plates are arranged between the inlet ring plate and the outlet ring plate, and each demister plate is arranged along the gas flow direction; the demister plate is composed of 2 sections of arc plates, 2 sections of straight plates and 2 fins, a fin is folded outward from the middle of the arc plate, the 2 arc plates are arranged oppositely and connected end to end, and the outer ends of the 2 arc plates are connected to the straight plates; distance plates are respectively set on the inlet ring plate and the outlet ring plate, the two ends of the demister plate are connected to the distance plates and are evenly spaced through the distance plates; a cleaning device is arranged on the gas pipeline above the demister plate, and the gas pipeline below the demister plate A drainage device is provided on the top; the cleaning device consists of a cleaning liquid inlet pipe, an inlet flange and a cleaning liquid spray pipe; the cleaning liquid inlet pipe is arranged on the top of the gas pipeline, and the top of the cleaning liquid inlet pipe is provided with an inlet flange for connecting the external cleaning liquid pipeline; the cleaning liquid spray pipe is an arc-shaped pipe, and the two ends of the arc-shaped pipe extend to the two sides of the gas pipeline respectively; a plurality of spray holes are arranged at the bottom of the cleaning liquid spray pipe, and the middle part of the cleaning liquid spray pipe is connected with the lower end of the cleaning liquid inlet pipe; the spray holes are arranged in multiple groups along the length of the cleaning liquid spray pipe, and each group of spray holes consists of 3 spray holes arranged on the same cross section; the 3 spray holes are all arranged radially, and the middle one spray hole is arranged vertically; a bottom notch is arranged at the bottom of the demister plate, and a top notch is arranged at the top of the demister plate corresponding to the installation position of the cleaning liquid spray pipe.

2. A gas pipeline demister according to claim 1, characterized in that: The straight plates are respectively clamped in the distance grooves on the distance plates at the corresponding ends; there is a smooth transition between the straight plates and the arc plates, and between the arc plates.

3. A gas pipeline demister according to claim 2, characterized in that: The fins are arranged obliquely, and the tips of the fins are all directed toward one end of the gas inlet.

4. A gas pipeline demister according to claim 1, characterized in that: The outer diameters of the inlet ring plate and the outlet ring plate match the inner diameter of the gas pipeline; the distance plate is arranged in the middle of the inlet ring plate and the outlet ring plate along the radial direction of the gas pipeline; the inlet ring plate and the inner wall of the gas pipeline, the outlet ring plate and the inner wall of the gas pipeline are welded and fixed; the inlet ring plate, the outlet ring plate and the corresponding distance plates are welded and fixed; the straight plate on the demisting plate is welded and fixed to the corresponding end distance plate and the corresponding parts of the inlet ring plate and the outlet ring plate.

5. A gas pipeline demister according to claim 1, characterized in that: The drainage device consists of a liquid collecting bucket, a drainage pipe and an outlet flange; a long hole is opened at the bottom of the gas pipeline below the defogger plate, a liquid collecting bucket is arranged on the outside of the gas pipeline at the corresponding position, a drainage pipe is arranged at the bottom of the liquid collecting bucket, and an outlet flange is arranged at the bottom of the drainage pipe for connecting with the external gas liquid sealing tank.

6. A gas pipeline demister according to claim 5, characterized in that: The liquid collecting hopper is composed of two end plates and two inclined plates. The two inclined plates are symmetrically arranged with the axis of the gas pipeline as the symmetry axis. The two ends of the two inclined plates are connected by the end plates at the corresponding ends. The top of the inclined plate and the top of the end plate are welded and fixed to the gas pipeline respectively; the bottom of the liquid collecting hopper is provided with an opening connected to the drain pipe.

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