CN203413665U

CN203413665U - Steam air heater single fin of rotary steam air heater

Info

Publication number: CN203413665U
Application number: CN201320465660.8U
Authority: CN
Inventors: 陆昕; 周立锋
Original assignee: WUXI CITY HUA TONG ELECTRIC POWER EQUIPMENT (ENGINEERING) Ltd Co
Current assignee: WUXI CITY HUA TONG ELECTRIC POWER EQUIPMENT (ENGINEERING) Ltd Co
Priority date: 2013-07-31
Filing date: 2013-07-31
Publication date: 2014-01-29
Anticipated expiration: 2023-07-31

Abstract

The utility model relates to a steam air heater single fin of a rotary steam air heater. The single fin is characterized by comprising a front shaft, a back shaft, an inlet steam header, a plurality of heat transfer tube bundles, a tube bundle fixing plate and a drain header, wherein the heat transfer tube bundles are arranged in parallel and fixed through the tube bundle fixing plate; two ends of the heat transfer tube bundles are respectively communicated with the inlet steam header and the drain header; the front shaft is arranged at the vertical mean axis position of the inlet steam header; the front shaft is hollow and communicated with the inlet steam header; the front shaft is used for connecting a steam inlet pipe through a rotary connector; the back shaft is arranged at the vertical mean axis position of the drain header; the back shaft is hollow and communicated with the drain header; and a drain connector for connecting a drain pipe is arranged on the back shaft. The single fin disclosed by the utility model has the advantages of ingenious structure, reasonable design, good heat transfer effect, energy conservation, environmental protection, high reliability, good practicality and capability of reducing the maintenance charge and overcoming the problems of existing steam air heater single fins that heat transfer tube bundles are not uniform in thermal expansion, weak weld joints are easily cracked and the phenomena of leaking, ash clogging and the like happen.

Description

The steam air heater monolithic of rotary air heater

Technical field

The utility model relates to the appurtenances on steam air heater, specifically a kind of steam air heater monolithic being applied on rotary air heater.

Background technology

Steam air heater is the boiler auxiliaries of northern China thermal power plant indispensability, is the heat transmission equipment of cold air that heating enters air preheater, and large-sized station boiler divides wind steam air heater and Secondary Air steam air heater, and its structure is identical with principle.Thermal power plant generally adopts the steam air heater that puts into operation to improve the wind-warm syndrome that enters air preheater winter, prevent the cold end corrosion that air preheater cold-end air generation sulfuric acid dewfall causes, cause the stifled ash of air preheater cold-end air heating surface, and then cause the unfavorable operating modes such as increase, the decline of air preheater heat exchange efficiency and exhaust gas temperature rising of suction, fan resistance.

Heat power plant boiler when operation be general to be adopted low-pressure steam to draw gas air preheater entrance wind and Secondary Air are carried out to preheating heating, the arrangement of steam air heater in air channel is generally fixed, steam air heater generally comprises a framework and is arranged on a plurality of steam air heater monolithics in framework, framework is that integral body is fixed on air preheater porch, between steam air heater monolithic, leaves space.Because steam air heater mainly moves during low temperature in the winter time, running time is short, and other times raise because of environment temperature, and steam air heater is stopped transport; But steam air heater is still placed in air channel during stopping transport, wind and Secondary Air resistance that air washes away that steam air heater tube bank causes still exist, and have increased station service.

Steam air heater monolithic is the vitals in steam air heater, whether the quality of its heat transfer property is directly connected to the efficiency of steam air heater, there is the easy drawing crack in inhomogeneous, the weak commissure of heating surface bank thermal expansion in existing steam air heater monolithic, thereby reveal, block up the problems such as ash, cause the operational reliability of steam air heater not reach expection requirement, maintenance maintenance cost is high.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of steam air heater monolithic of rotary air heater is provided, and its structure is ingenious, reasonable in design, and heat-transfer effect is good, energy-conserving and environment-protective, and reliability is strong, minimizing maintenance cost, more practical.

The technical scheme providing according to the utility model: the steam air heater monolithic of rotary air heater, is characterized in that: comprise front axle, rear axle, inlet steam header, heating surface bank, tube bank fixed head and hydrophobic header; Several heating surface banks are arranged in parallel and fix by tube bank fixed head, and the two ends of heating surface bank are connected and communicate with hydrophobic header with inlet steam header respectively; Described front axle is arranged on the vertical central axis position of inlet steam header, front axle inner hollow and with inlet steam header internal communication, front axle is for being connected with steam steam inlet pipe by swivel joint; Described rear axle is arranged on the vertical central axis position of hydrophobic header, rear axle inner hollow and with hydrophobic header internal communication, rear axle is provided with for connecting the hydrophobic joint of drainpipe.

As further improvement of the utility model, described inlet steam header is mainly comprised of half sheet seamless steel pipe, end plate and tube sheet, half sheet seamless steel pipe is connected sealing along the both sides of axis direction and the both sides of tube sheet, the two ends of half sheet seamless steel pipe and tube sheet seal by end plate, tube sheet is provided with the through hole consistent with heating surface bank quantity, and heating surface bank is inner to be connected with the through hole on tube sheet; The structure of described hydrophobic header is identical with inlet steam header.

As further improvement of the utility model, the connecting portion of the connecting portion of described front axle and inlet steam header, rear axle and hydrophobic header is provided with stiffening ring.

As further improvement of the utility model, described stiffening ring is that cross section is half sheet pipe of circular arc, and central angle corresponding to half sheet pipe dual-side is 120 °.

As further improvement of the utility model, the periphery wall of described heating surface bank is provided with a plurality of helical fins of evenly arranging along heating surface bank axis direction.

As further improvement of the utility model, described heating surface bank adopts steel combined with aluminum material to make.

compared with prior art, advantage is the utility model:the utility model structure is ingenious, reasonable in design, overcome the problems such as the leakage that existing steam air heater monolithic exists the easy drawing crack in inhomogeneous, the weak commissure of heating surface bank thermal expansion to cause, stifled ash, heat-transfer effect is good, energy-conserving and environment-protective, reliability is strong, minimizing maintenance cost, more practical.

Accompanying drawing explanation

Fig. 1 is the structural front view of the utility model embodiment steam air heater monolithic.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the top view of Fig. 1.

Fig. 4 is that A-A in Fig. 1 is to partial sectional view.

Fig. 5 is that B-B in Fig. 1 is to cutaway view.

The specific embodiment

Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.

As shown in Fig. 1 ~ Fig. 5, the steam air heater monolithic of the rotary air heater in embodiment is mainly comprised of front axle 1, rear axle 2, inlet steam header 5, heating surface bank 6, tube bank fixed head 7 and hydrophobic header 8; Several heating surface banks 6 are arranged in parallel and pass through tube bank fixed head 7 and fix, and the two ends of heating surface bank 6 are connected and communicate with hydrophobic header 8 with inlet steam header 5 respectively, and front axle 1 is for being connected with steam steam inlet pipe by swivel joint 3; Described front axle 1 is arranged on the vertical central axis position of inlet steam header 5, front axle 1 inner hollow and with inlet steam header 5 internal communication; Described rear axle 2 is arranged on the vertical central axis position of hydrophobic header 8, rear axle 2 inner hollow and with hydrophobic header 8 internal communication, rear axle 2 is provided with for connecting the hydrophobic joint 3 of drainpipe.

As shown in Figure 1, in the utility model embodiment, described inlet steam header 5 is mainly comprised of half sheet seamless steel pipe 4a, end plate 4c and tube sheet 4b, half sheet seamless steel pipe 4a is connected sealing along the both sides of axis direction and the both sides of tube sheet 4b, the two ends of half sheet seamless steel pipe 4a and tube sheet 4b seal by end plate 4c, tube sheet 4b is provided with the through hole consistent with heating surface bank 6 quantity, and heating surface bank 6 is inner to be connected with the through hole on tube sheet 4b; The structure of described hydrophobic header 8 is identical with inlet steam header 5, so locate do not repeating.

In order to improve the structural strength of steam air heater monolithic, described front axle 1 is provided with stiffening ring 4 with connecting portion, the rear axle 2 of inlet steam header 5 with the connecting portion of hydrophobic header 8.Described stiffening ring 4 is that cross section is half sheet pipe of circular arc, and central angle corresponding to half sheet pipe dual-side is 120 °.

In order to ensure the heat transfer efficiency of steam air heater monolithic, the periphery wall of described heating surface bank 6 is provided with a plurality of helical fins 9 of evenly arranging along heating surface bank 6 axis directions.And heating surface bank 6 preferably adopts steel combined with aluminum material to make.

Claims

1. the steam air heater monolithic of rotary air heater, is characterized in that: comprise front axle (1), rear axle (2), inlet steam header (5), heating surface bank (6), tube bank fixed head (7) and hydrophobic header (8); Several heating surface banks (6) are arranged in parallel and pass through tube bank fixed head (7) and fix, and the two ends of heating surface bank (6) are connected and communicate with hydrophobic header (8) with inlet steam header (5) respectively; Described front axle (1) is arranged on the vertical central axis position of inlet steam header (5), front axle (1) inner hollow and with inlet steam header (5) internal communication, front axle (1) is for being connected with steam steam inlet pipe by swivel joint (3); Described rear axle (2) is arranged on the vertical central axis position of hydrophobic header (8), rear axle (2) inner hollow and with hydrophobic header (8) internal communication, rear axle (2) is provided with for connecting the hydrophobic joint (3) of drainpipe.

2. the steam air heater monolithic of rotary air heater as claimed in claim 1, it is characterized in that: described inlet steam header (5) is mainly comprised of half sheet seamless steel pipe (4a), end plate (4c) and tube sheet (4b), half sheet seamless steel pipe (4a) is connected sealing along the both sides of axis direction with the both sides of tube sheet (4b), the two ends of half sheet seamless steel pipe (4a) and tube sheet (4b) are by end plate (4c) sealing, tube sheet (4b) is provided with the through hole consistent with heating surface bank (6) quantity, and heating surface bank (6) is inner to be connected with the through hole on tube sheet (4b); The structure of described hydrophobic header (8) is identical with inlet steam header (5).

3. the steam air heater monolithic of rotary air heater as claimed in claim 1, is characterized in that: described front axle (1) is provided with stiffening ring (4) with connecting portion, the rear axle (2) of inlet steam header (5) with the connecting portion of hydrophobic header (8).

4. the steam air heater monolithic of rotary air heater as claimed in claim 3, is characterized in that: described stiffening ring (4) is that cross section is half sheet pipe of circular arc, and central angle corresponding to half sheet pipe dual-side is 120 °.

5. the steam air heater monolithic of rotary air heater as claimed in claim 1, is characterized in that: the periphery wall of described heating surface bank (6) is provided with a plurality of helical fins (9) of evenly arranging along heating surface bank (6) axis direction.

6. the steam air heater monolithic of rotary air heater as claimed in claim 1, is characterized in that: described heating surface bank (6) adopts steel combined with aluminum material to make.