WO2021174972A1

WO2021174972A1 - Inlet flow mixing pipe for desulphurization tower

Info

Publication number: WO2021174972A1
Application number: PCT/CN2020/140261
Authority: WO
Inventors: 李勇杰; 陆佳; 王永强; 陈建银; 杨阳; 陈俊耿
Original assignee: 中船黄埔文冲船舶有限公司; 广州文冲船厂有限责任公司
Priority date: 2020-03-04
Filing date: 2020-12-28
Publication date: 2021-09-10
Also published as: CN111086618A

Abstract

An inlet flow mixing pipe for a desulphurization tower, comprising a bottom sealing plate (1) and a connecting plate (2) located above the bottom sealing plate (1); the bottom sealing plate (1) and the connecting plate (2) are integrally connected by means of a peripheral plate, and the bottom sealing plate (1), the connecting plate (2) and the peripheral plate enclose an internal space into which exhaust gas is discharged; the bottom sealing plate (1) is provided with a generator air inlet hole, a main machine air inlet hole and a boiler air inlet hole, an air outlet hole is provided on the connecting plate (2), and an air inlet pipe (3) is provided at each of the generator air inlet hole, the main machine air inlet hole and the boiler air inlet hole, an air outlet pipe (4) is provided at the air outlet hole, and the center of the main machine air inlet hole, the center of the air inlet pipe (3) provided at the main machine air inlet hole, the center of the air outlet hole on the connection plate (2) and the center of the air outlet pipe (4) are all on the same straight line. The inlet flow mixing pipe for a desulphurization tower has a small backpressure, discharges gas smoothly, occupies a small space, and has a simple structure.

Description

Inlet mixed flow pipe of desulfurization tower

This application claims the priority of the Chinese patent application whose application date is March 4, 2020 and the application number is 202010143070.8. The entire content of this application is incorporated into this application by reference.

Technical field

This application relates to the inlet mixed flow pipe of the desulfurization tower on the ship.

Background technique

With the implementation of the MARPOL Convention, more and more ships have installed desulfurization towers to reduce the emission of sulfide in the exhaust gas in recent years. It is difficult to realize the confluence of exhaust gas from the main engine, generator and boiler to the intake pipe inlet of the desulfurization tower in the limited space of the pipe. In the industry, branch pipes are usually set on a main pipe that is connected to the intake pipe of the desulfurization tower, and the main engine exhaust pipe, generator exhaust pipe and boiler exhaust pipe are connected to the corresponding branch pipes to make the exhaust gas flow into the main pipe. In the air intake pipe of the desulfurization tower, the main pipe is discharged from the main pipe. Because there are more branch pipes, it occupies a larger space. The branch pipes are complicatedly arranged when entering the main pipe, which produces a large back pressure on the exhaust gas emission and affects the main engine. And the generator works normally.

Summary of the invention

The present application provides an inlet mixed flow pipe of a desulfurization tower with low back pressure, stable exhaust, small space occupation, and simple structure.

The inlet mixed flow pipe of a desulfurization tower described in the present application includes a bottom sealing plate and a connecting plate located above the bottom sealing plate. The bottom sealing plate and the connecting plate are connected as a whole through a peripheral plate. The bottom sealing plate, The connecting plate and the peripheral plate enclose the internal space for the exhaust gas to be discharged; the generator air inlet, the main engine air inlet and the boiler air inlet are arranged on the bottom sealing plate, and the air outlet is arranged on the connecting plate for the power generation The air inlet of the main engine, the air inlet of the main engine and the air inlet of the boiler are all provided with an air inlet pipe, and an air outlet pipe is arranged at the air outlet. The center, the center of the air outlet on the connecting plate, and the center of the air outlet pipe are all on the same straight line.

In the inlet mixed flow pipe of a desulfurization tower described in this application, the exhaust pipe of the main engine, the exhaust pipe of the generator, and the exhaust pipe of the boiler respectively correspond to the intake pipe at the intake port of the main engine and the intake pipe at the intake port of the generator. The inlet pipe and the inlet pipe at the boiler inlet are connected, and the outlet pipe on the connecting plate is connected with the inlet pipe of the desulfurization tower. The exhaust gas produced by the main engine, generator and boiler will enter the inlet of the desulfurization tower through each inlet pipe In the internal space of the mixed flow pipe, and enter the desulfurization tower from the outlet pipe on the connecting plate through the inlet pipe of the desulfurization tower, because the exhaust pipes of the main engine, generator and boiler are all passed through the holes in the bottom sealing plate. It merges into the internal space enclosed by the bottom sealing plate, the connecting plate and the peripheral plate, avoiding the installation of branch pipes, thus greatly reducing the volume of the inlet mixed flow pipe of the desulfurization tower, reducing the space occupied by it, and avoiding opening The branch pipes are connected in a more concise and beautiful manner; and the center of the air inlet of the host, the center of the air inlet pipe arranged at the air inlet of the host, the center of the air outlet on the connecting plate, and the center of the air outlet are all on the same straight line Therefore, the back pressure of the exhaust gas discharge is reduced, and the exhaust gas is more stable; in addition, the inlet mixed flow pipe of the desulfurization tower has a simple structure and convenient connection, so it is convenient to install and maintain.

Description of the drawings

Figures 1 and 2 are schematic diagrams of the three-dimensional structure of the application.

Fig. 3 is a left side view of Fig. 1.

Detailed ways

An inlet mixed flow pipe of a desulfurization tower, as shown in Figures 1 to 3, includes a bottom sealing plate 1 and a connecting plate 2 located above the bottom sealing plate 1. The bottom sealing plate 1 and the connecting plate 2 pass through the periphery The plates are connected as a whole, the bottom sealing plate 1, the connecting plate 2 and the peripheral plate enclose the internal space for exhaust gas to be discharged; the bottom sealing plate 1 is provided with generator air inlets, main engine air inlets and boiler air inlets , The connecting plate 2 is provided with an air outlet, an air inlet pipe 3 is provided at the generator air inlet, the main engine air inlet and the boiler air inlet, and an air outlet pipe 4 is provided at the air outlet, and the main engine air inlet The center of the hole, the center of the air inlet pipe 3 arranged at the air inlet of the main engine, the center of the air outlet hole on the connecting plate 2 and the center of the air outlet pipe 4 are all on the same straight line. A flange is provided at the inlet end of each intake pipe 3, which is connected with the nozzle flange of the generator exhaust pipe, the nozzle flange of the main engine exhaust pipe, and the nozzle flange of the boiler exhaust pipe through the flange. , A flange is provided at the outlet end of the outlet pipe 4, and the outlet pipe 4 is connected with the flange at the mouth of the inlet pipe of the desulfurization tower through the flange; the flange end face on the inlet end of the inlet pipe 3 is at the bottom sealing plate 1 The distance between φ and the flange end face of the gas outlet pipe 4 and the connecting plate 2 are both 120 mm, which meets the space requirement for welding and saves materials.

There are multiple generator air inlets, and the multiple generator air inlets and boiler air inlets are arranged on the bottom sealing plate 1 at even intervals, as shown in Fig. 2, to further exhaust the generator and the boiler. When it flows into the main pipe, it is stable and does not produce turbulence.

The peripheral plate has a tapered structure converging from the bottom sealing plate 1 to the connecting plate 2, as shown in Figs.

The edge of the bottom sealing plate 1 is in an irregular prismatic structure, and further includes a plurality of lower border plates 5 of vertical bottom sealing plate, and the bottom end of each lower border plate 5 corresponds to the edge of the bottom sealing plate 1. The edges of the length are connected as a whole, the adjacent ends of the adjacent lower edge panels 5 are connected as a whole, and the bottom end of the peripheral plate is connected with the top ends of the plurality of lower edge panels 5 as a whole, through the connecting plate 2, the peripheral plate , A plurality of lower side panels 5 and bottom sealing panel 1 enclose the internal space into which exhaust gas is discharged.

The peripheral board includes a plurality of panels 6, the bottom end of each panel 6 is connected with a corresponding length of the lower side panel 5 as a whole, the adjacent ends of adjacent panels 6 are connected as a whole, and a plurality of panels The top end of 6 is connected to the connecting plate 2 as a whole, and the inner space for exhaust gas to be discharged is enclosed by the connecting plate 2, multiple jigsaw panels 6, multiple lower edge panels 5 and bottom sealing plate 1 to facilitate the use of The inlet mixed flow tube forms a convergent structure as a whole to further realize the smooth and smooth confluence.

As shown in Figure 3, a manhole 7 is provided on the side adjacent to the air inlet of the host and on the peripheral plate, a manhole cover flange 9 is provided at the manhole 7, and a manhole cover is provided on the manhole cover flange 9 Board 8. The manhole 7 is square, and the manhole cover plate 8 and the manhole cover flange 9 on it are also square; a sealing gasket is arranged between the manhole cover plate 8 and the manhole cover flange 9 to facilitate The mixed flow pipe is cleaned and maintained. The manhole cover flange 9 and the manhole cover plate 8 are fixed with bolts to achieve the purpose of sealing.

A handle 10 is provided on the manhole cover 8 to facilitate opening the manhole cover 8.

The size of the generator air inlet, the size of the main engine air inlet, and the boiler air inlet are 5mm larger than the outer diameter of the air inlet pipe 3 inside, and the air outlet is larger than the outer diameter of the air outlet pipe 4. The diameter is 5mm larger to facilitate the welding of the bottom sealing plate 1 and the intake pipe 3.

The length of the air inlet pipe 3 is 150 mm, and the length of the air outlet pipe 4 is 135 mm, which facilitates the double-sided welding of the air inlet pipe 3 and the bottom sealing plate 1 to meet the welding space requirement and save materials.

Claims

An inlet mixed flow pipe of a desulfurization tower, comprising a bottom sealing plate (1) and a connecting plate (2) located above the bottom sealing plate (1), the bottom sealing plate (1) and the connecting plate (2) pass through The peripheral plate is connected as a whole. The bottom sealing plate (1), the connecting plate (2) and the peripheral plate enclose the internal space for exhaust gas to enter; the bottom sealing plate (1) is provided with the generator air inlet and the main engine inlet The air holes and the boiler air inlets are provided with air outlets on the connecting plate (2), and air inlet pipes (3) are arranged at the generator air inlets, the main engine air inlets and the boiler air inlets, at the air outlets An air outlet pipe (4) is provided, the center of the air inlet hole of the main engine, the center of the air inlet pipe (3) arranged at the air inlet hole of the main engine, the center of the air outlet hole on the connecting plate (2), and the air outlet pipe (4) The centers are all on the same straight line.
The inlet mixed flow pipe of a desulfurization tower according to claim 1, wherein: the center of the air inlet of the main engine, the center of the air inlet pipe (3) arranged at the air inlet of the main engine, and the connecting plate (2) The center of the air outlet hole and the center of the air outlet pipe (4) are on the same straight line.
The inlet mixed flow pipe of a desulfurization tower according to claim 2, wherein: the generator inlet has a plurality of inlets, and the plurality of generator inlets and the boiler inlets are arranged on the bottom sealing plate at even intervals (1) On.
The inlet mixed flow pipe of a desulfurization tower according to any one of claims 1 to 3, wherein: the peripheral plate has a conical structure converging from the bottom sealing plate (1) to the connecting plate (2).
The inlet mixed flow pipe of a desulfurization tower according to claim 4, wherein: the edge of the bottom sealing plate (1) is in an irregular prismatic structure, and further includes a plurality of lower edge plates of vertical bottom sealing plates (5), the bottom end of each lower side panel (5) is connected with the edge of the corresponding length of the bottom sealing plate (1) as a whole, and the adjacent ends of the adjacent lower side panels (5) are connected as a whole , The bottom end of the peripheral board is connected to the top end of the plurality of lower peripheral boards (5) as a whole, through the connecting plate (2), the peripheral board, the plurality of lower peripheral boards (5) and the bottom sealing board (1) Enclose the internal space into which the exhaust gas is discharged.
The inlet mixed flow pipe of a desulfurization tower according to claim 5, wherein: the peripheral plate includes a plurality of panels (6), and the bottom end of each panel (6) is connected to a lower peripheral edge of a corresponding length. The boards (5) are connected as a whole, the adjacent ends of adjacent splicing boards (6) are connected as a whole, and the top ends of a plurality of splicing boards (6) are all connected with the connecting board (2) as a whole.
The inlet mixed flow pipe of a desulfurization tower according to any one of claims 1-6, wherein: a manhole (7) is provided on the side adjacent to the air inlet of the main engine and on the peripheral plate, and a manhole (7) is provided in the manhole (7). ) Is provided with a manhole cover flange (9), and a manhole cover plate (8) is provided on the manhole cover flange (9).
The inlet mixed flow pipe of a desulfurization tower according to claim 7, wherein a handle (10) is provided on the manhole cover (8).
The inlet mixed flow pipe of a desulfurization tower according to claim 1, wherein: the size of the air inlet of the generator, the size of the air inlet of the main engine, and the size of the air inlet of the boiler are respectively larger than those of the air inlet pipe therein. The outer diameter of (3) is 5mm larger, and the size of the air outlet is 5mm larger than the outer diameter of the air outlet pipe (4).
The inlet mixed flow pipe of a desulfurization tower according to claim 9, wherein the length of the inlet pipe (3) is 150 mm, and the length of the outlet pipe (4) is 135 mm.