阅读说明：本技术 一种带有扰流墙的空气预热器底座 (air preheater base with spoiler wall ) 是由 吕宏霞 崔建波 匡素丽 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种带有扰流墙的空气预热器底座,是在底座内烟气入口对面设置一个扰流墙；扰流墙正面对着烟气入口为弧形,高度与烟气入口最高点相同；该底座可有效阻止高温烟气直接冲击内壁耐火料防止耐火料局部脱落,对高温烟气进行扰动均匀分布在底座内再进入管程,保证各换热管下段受热应力均匀、防止耐火料局部脱落。(The invention discloses air preheater bases with turbulence walls, wherein turbulence walls are arranged opposite to a flue gas inlet in a base, the front side of each turbulence wall, which faces the flue gas inlet, is arc-shaped, and the height of each turbulence wall is the same as the highest point of the flue gas inlet.)

The air preheater base with the turbulence walls comprises a base (1), a cleaning port (2) and the turbulence walls (3), and is characterized in that the turbulence walls (3) are arranged opposite to a flue gas inlet in the base (1), the flue gas flow does not impact refractory materials on the inner wall of the base (1) after entering, the turbulence walls (3) are arc-shaped opposite to the flue gas inlet, the flue gas flow is uniformly distributed in the upper space of the base (1) after being deflected, and the height of the turbulence walls (3) is the same as the highest point of the flue gas inlet, so that the flue gas is enabled to be quickly disturbed and flow towards the vertical direction after entering.

2. A base for an air preheater with baffle walls as set forth in claim 1, wherein the baffle walls (3) are provided in the base (1) opposite to the flue gas inlet.

3. A base for an air preheater with baffle walls as set forth in claim 1, wherein the baffle walls (3) are curved to face the flue gas inlet at the same height as the highest point of the flue gas inlet.

Technical Field

The invention relates to a shell-and-tube air preheater base, the tube pass is the high temperature flue gas, the shell pass is the air, the high temperature flue gas enters the tube pass through the base, the cold air enters the shell pass from the upper part of the shell of the heat exchange section to exchange heat with the high temperature flue gas entering the tube pass, and then flows out from the lower part outlet, thus achieving the purpose of heating the air, the high temperature flue gas from the reaction furnace enters the side surface of the base from the horizontal direction and then vertically upwards enters the tube pass of the heat exchange section of the air preheater, and then flows out from the upper part flue gas outlet after exchanging heat with the air in the shell pass, the flue gas enters the base and then turns 90 degrees under the blockage of the inner wall to flow upwards, thus generating definite impact on the refractory material opposite to the flue gas inlet of the base, meanwhile, the flue gas flow is mainly concentrated at the position, causing the uneven distribution of the flue gas entering the tube pass, the heat exchange tubes at the flue gas concentration position are deformed and damaged first, the base can effectively prevent the high temperature flue gas from directly impacting the refractory material to prevent the local falling off, and disturb and uniformly distribute in.

Background

is widely applied to a shell-and-tube air preheater in the fields of carbon black, chemical engineering, chemical fertilizers and the like for many years, high-temperature flue gas or tail gas generated in the reaction process is mainly used for heating air, and hot air returns to a reaction furnace for combustion supporting to achieve the purpose of energy saving.

Therefore, there is a need to develop air preheater bases with baffle walls that disrupt the impact of the smoke formation and evenly distribute the smoke after it enters the base and changes direction of flow.

Disclosure of Invention

The invention aims to develop air preheater bases with spoiler walls, which effectively solve the problems of serious local deformation or damage caused by uneven heating of the lower sections of heat exchange tubes of a tube bundle of an air preheater and local falling of refractory materials of the bases.

The technical scheme adopted by the invention is as follows:

air preheater base with baffle walls comprises a base, baffle walls and a cleaning port, and is characterized in that baffle walls are arranged opposite to a flue gas inlet in the base, the front of each baffle wall is arc-shaped opposite to the flue gas inlet, the height of each baffle wall is the same as the highest point of the flue gas inlet, the cleaning port is arranged on the back of each baffle wall, and the baffle walls of the base eliminate the problems that high-temperature flue gas directly impacts a refractory material in the base and the flue gas entering a heat exchange tube is not uniformly distributed.

turbulence walls are arranged in the base, so that the impact of high-temperature flue gas on refractory materials in the base is effectively relieved.

The front surface of the turbulence wall is arc-shaped, and flue gas entering the base is uniformly distributed and enters the tube pass after being turned.

The height of the turbulence wall is the height of the highest point of the flue gas inlet.

The invention breaks the internal structure of the original base and plays an effective protection role for the tube bundle.

The air preheater base with the spoiler of the invention has the design key points that:

1. a turbulence wall is arranged in the base to protect the refractory material on the inner wall of the base from being impacted by high-temperature flue gas, and the flue gas is uniformly distributed after turning;

2. the front surface of the turbulence wall facing the flue gas inlet is arc-shaped, and the height of the turbulence wall is the highest point of the flue gas inlet;

3. the cleaning port is arranged on the back of the turbulent flow wall;

4. the base spoiler wall of the invention is arranged along the following route:

base-refractory-spoiler wall-cleaning port

The invention has the advantages that:

, the problem of deformation and damage of the lower section of the heat exchange tube of the air preheater tube bundle is solved;

secondly, the problem that the refractory material in the base is easy to fall off locally and has short service life is solved;

the turbulent wall is simple in structure, safe and reliable, has effective protection effect and great significance on the air preheater, eliminates adverse effects caused by uneven distribution of flue gas entering a high-temperature section heat exchange tube of the tube bundle of the air preheater, ensures that the tube bundle is free of distortion and deformation, and ensures the service life of the air preheater.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1 according to the present invention

The labels in the figure are: 1-base, 2-cleaning port, 3-turbulence wall and 4-tube bundle

FIG. 3 is a schematic diagram of the original structure

FIG. 4 is a schematic cross-sectional view taken along line B-B in FIG. 3

The labels in the figure are: 1-base, 2-cleaning port, 3-tube bundle

Detailed Description

A base of air preheater with baffle wall, comprises a base 1, a cleaning opening 2 and a baffle wall 3.

After the refractory material is filled in the inner cylinder of the base 1, the turbulence wall 3 is laid on the bottom plate in the base by using refractory bricks, the refractory material is filled in the turbulence wall 3 and the bottom plate , the height of the turbulence wall 3 is the highest point of the flue gas inlet, the front surface of the turbulence wall 3 opposite to the flue gas inlet is an arc-shaped front surface, the back surface is a plane, the cross section is arc-shaped, and the cleaning port 2 is positioned at the lower part of the base 1 opposite to the back surface of the turbulence.

The additionally arranged turbulence wall provides a brand new design for the base structure of the air preheater, can solve the problems of local deformation and damage of the lower-section heat exchange tubes of the tube bundle of the air preheater caused by uneven entering of high-temperature flue gas into the tube bundle for many years, and effectively solves the problem of short-term local falling of refractory materials in the base, thereby resulting in short service life of the air preheater.

When the turbulence wall is additionally arranged, the air flow is blocked,

① before the inner cylinder of the base 1 is filled with the refractory material and the bottom plate at the lower part is filled with the refractory material, building a spoiler 3 refractory brick on the bottom plate according to the figure;

② the bottom plate and the firebricks are used as refractory, the front of the spoiler wall 3 is arc-shaped, and the back is plane;

③, drying and maintaining the refractory materials of the base 1 and the spoiler wall 3 according to the process requirements;

④ is fitted with cleaning port 2.