CN201496986U

CN201496986U - Energy-saving anti-clogging air heater

Info

Publication number: CN201496986U
Application number: CN2009200307423U
Authority: CN
Inventors: 黄新元; 田鹏; 卢艳龙
Original assignee: SHANDONG HONGAO ELECTRIC POWER TECHNOLOGY Co Ltd
Current assignee: SHANDONG HONGAO ELECTRIC POWER TECHNOLOGY Co Ltd
Priority date: 2009-07-30
Filing date: 2009-07-30
Publication date: 2010-06-02
Anticipated expiration: 2019-07-30

Abstract

The utility model relates to an energy-saving anti-clogging air heater which belongs to the device which is applicable to the boiler in a heat power plant, which consists of a rotating disc, a labyrinth seal, a heat conduction pipe bundle, a pipe bundle self-stabilizing structure and a double-heat-expansion self-absorption structure, and overcomes the defects that the air heater blocks the ash, the weld seam is cracked, the pipe is leaked, the air heater which is arranged inside an air course produces resistant force when not in use and the power consumption is large. The heat conduction pipe bundle rotates for 90 degrees with an air inlet pipe and a water outlet pipe of the air heater as a rotating shaft under the stabilizing and supporting effect of the pipe bundle self-stabilizing structure, so the resistant force which is produced when in work can be reduced; the rotating disc is provided with the labyrinth seal, so the pressure steam can be ensured not to be leaked; and the heat conduction pipes are lined up sparsely, so the distance of the fins, the longitudinal distance and the transverse distance are increased, and the problem that the heat conduction pipe blocks ash and stops the foreign matters can be solved; and moreover, the double-heat-expansion self-absorption structure prevents the cracking of the weld seam and the leakage of the pipe of the air heater.

Description

Energy-conservation block-proof type steam air heater

Technical field:

The utility model belongs to heat power equipment, the energy-conservation block-proof type steam air heater that is particularly suited for using in heat power plant boiler.

Background technology:

Steam air heater be northern thermal power plant the auxiliary equipment that must use.Steam air heater had only about 90 days in its running time in 1 year, but between lay-off period, steam air heater still places the air channel, the boiler air-supply still will be passed through steam air heater, pressure fan expends a large amount of electric energy and makes idle work, because improper (the fin tube structure densification of design, tube pitch is too little, flowing resistance is big) thus domestic steam air heater mostly have more serious clogging phenomenon, can't carry out on-line cleaning behind the stifled ash of steam air heater, can only wait long unit outage chance, not only make the blower fan power consumption skyrocketing, and cause the burner hearth air-supply not enough when serious, even be forced to the load down operation, also exist because phenomenons such as weld cracking that the thermal expansion inequality causes and pipe leakages in addition.

Chinese patent 9822036705 has provided a kind of rotatable steam air heater, and it is intended to make steam air heater to revolve to turn 90 degrees, thereby reduces steam air heater idle the time and the resistance that produces.Its structure includes rotating actuator, heat transfer tube group.The two ends of heat transfer tube group are in addition in parallel and be fixed on the rotation transmission axis by the collection case respectively, and rotating actuator is finished 90 degree rotations by a connecting rod axis.But this steam air heater that revolves is not suitable for safe and reliable rotation under the spinning obstacle that brings thus at the heat-transfer pipe gravity deformation, is not suitable under the boiler room environment safe and reliable rotation under the hot and grey attitude of steam air heater yet.

Summary of the invention:

The purpose of this utility model be exactly for overcome the stifled ash of steam air heater in the above-mentioned prior art, weld cracking, pipe is revealed and steam air heater the time spent does not place the air channel and the generation resistance expends the shortcoming of a large amount of electric energy.

To achieve these goals, technical solution of the present utility model is:

A kind of boiler is with energy-conservation block-proof type steam air heater, be to constitute by rotating disc, labyrinth sealing, heating surface bank, tube bank self-stabilization structure, it is characterized in that: heating surface bank is uniform by the parallel layering of several isodiametric pipes, heat-transfer pipe is by tube bank self-stabilization structure firm support in addition, the two ends of tube bank self-stabilization structure and vapour, the water collection case at heating surface bank two ends are rotatable and are connected, connecting portion at its two collection case has rotating disc, and rotating disc is equipped with the labyrinth sealing system.

The purpose of this utility model can also be by following other technologies solution:

Adopt the proprietary structure of dual thermal expansion self-absorption, heating surface bank is sparse arrangement, spacing of fin, horizontal spacing, longitudinal pitch increase, by the tube bank self-stabilization structure heat-transfer pipe of firm support in addition, form venetian blind type assembly rotating mechanism with steam inlet pipe and drain pipe, rotating shaft is the steam inlet pipe and the drain pipe of steam air heater heat transfer tube group, and rotating mechanism adopts electronic rocker-arm transmission mechanism to be rotated.

The temperature that enters air preheater gas has been improved in the sealing air channel during the utility model work; When not working, by the self-stabilization structure in addition the heating surface bank of firm support be that rotating shaft revolves and turn 90 degrees with air inlet, the outlet pipe of heat-transfer pipe, thereby reduce the resistance that produces when not working; Rotating disc is equipped with labyrinth sealing, can guarantee that like this band presses steam not leak in the heat-transfer pipe; Adopt the proprietary structure of dual thermal expansion self-absorption, heating surface bank is sparse arrangement, spacing of fin, horizontal spacing, longitudinal pitch and all increases than steam air heater of the prior art, so just solve the problem of stifled ash of tube bank and obstruction foreign material substantially, thereby eliminated the phenomenon that steam air heater run duration resistance increases, consumes the blower fan electric energy rapidly; Tube bank self-stabilization structure can prevent the heating surface bank gravity deformation and the spinning obstacle that brings thus, guarantees the safe and reliable rotation of steam air heater; Steam air heater is equipped with the proprietary structure of dual thermal expansion self-absorption, can prevent that the steam air heater pipe from revealing and snap.

Description of drawings

The utility model is described in further detail below by accompanying drawing:

1. 2. rotating disc restrains the self-stabilization structure, 3. heating surface bank, 4. vapour, water collection case, 5. labyrinth sealing, 6. rotating shaft, 7. air inlet, outlet pipe.

Accompanying drawing 1 places the front view in air channel for steam air heater.

Accompanying drawing 2 is the steam air heater partial enlarged drawing.

Accompanying drawing 3 is the cutaway view of steam air heater duty.

The specific embodiment:

A kind of boiler is with energy-conservation block-proof type steam air heater, tube bank self-stabilization structure two ends and the 3. vapour at two ends of heating surface bank 2., 4. water collection case is rotatable connection, there is rotating disc 1. at its rotation position, 5. 1. rotating disc be equipped with labyrinth sealing, by tube bank self-stabilization structure 2. in addition the heating surface bank of firm support 3. with air inlet, 7. outlet pipe turn 90 degrees for 6. rotating shaft revolves, reduce the resistance that produces when steam air heater is not worked, adopt the proprietary structure of dual thermal expansion self-absorption, 3. heating surface bank takes sparse arrangement, spacing of fin, horizontal spacing, longitudinal pitch all increases than steam air heater of the prior art, has so just solved the stifled ash of tube bank substantially, the problem of blocking foreign material and weld cracking.

Claims

1. a boiler is with energy-conservation block-proof type steam air heater, be to constitute by rotating disc, labyrinth sealing, heating surface bank, tube bank self-stabilization structure, it is characterized in that: heating surface bank is uniform by the parallel layering of several isodiametric pipes, heat-transfer pipe is by tube bank self-stabilization structure firm support in addition, the two ends of tube bank self-stabilization structure and vapour, the water collection case at heating surface bank two ends are rotatable and are connected, connecting portion at its two collection case has rotating disc, and rotating disc is equipped with the labyrinth sealing system.

2. boiler according to claim 1 is with energy-conservation block-proof type steam air heater, and it is characterized in that: adopt the proprietary structure of dual thermal expansion self-absorption, heating surface bank is sparse arrangement, and spacing of fin, horizontal spacing, longitudinal pitch increase.

3. boiler according to claim 1 and 2 is characterized in that with energy-conservation block-proof type steam air heater: by the tube bank self-stabilization structure heat-transfer pipe of firm support in addition, form venetian blind type assembly rotating mechanism with steam inlet pipe and drain pipe.

4. boiler according to claim 3 is with energy-conservation block-proof type steam air heater, and it is characterized in that: the rotating shaft of rotating mechanism is the steam inlet pipe and the drain pipe of steam air heater heat transfer tube group.

5. boiler according to claim 4 is characterized in that: rotating mechanism employing electric/manual rocker-arm transmission mechanism with energy-conservation block-proof type steam air heater.