CN218721620U

CN218721620U - Waste heat recovery device for heat supply boiler

Info

Publication number: CN218721620U
Application number: CN202222479599.4U
Authority: CN
Inventors: 王松
Original assignee: Beijing Beihuo Lvgu Heating Technology Development Co ltd
Current assignee: Beijing Beihuo Lvgu Heating Technology Development Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-03-24
Anticipated expiration: 2032-09-19

Abstract

The utility model relates to a boiler waste heat recovery technical field specifically discloses a heat recovery device for heating boiler, including first casing and second casing, the inner chamber of first casing and second casing is linked together, upper and lower both ends in the first casing are equipped with first top chamber and first bottom chamber respectively, be connected with a plurality of first heat exchange tubes between first top chamber and the first bottom chamber, the outside of steam pipe is equipped with presss from both sides the cover, the top that presss from both sides the cover is connected with the outlet pipe, the sub-unit connection who presss from both sides the cover has the oral siphon, the bottom of first casing is connected with first inlet tube, upper and lower both ends in the second casing are equipped with second top chamber and second bottom chamber respectively, be connected with a plurality of second heat exchange tubes between second top chamber and the second bottom chamber, the top of second casing is connected with the drain pipe, drain pipe and oral siphon intercommunication, the bottom of second casing is connected with the second inlet tube, the utility model discloses the structure is ingenious, can effectively utilize boiler tail gas's waste heat.

Description

Waste heat recovery device for heat supply boiler

Technical Field

The utility model relates to a boiler waste heat recovery technical field especially relates to a waste heat recovery device for heating boiler.

Background

The boiler is a device for heating water through fuel combustion to produce high-temperature steam, the combusted tail gas of the boiler contains a large amount of heat, in order to improve the energy utilization rate, the prior art generally recovers the waste heat of the tail gas, but in actual use, the recovery efficiency of a single heat exchanger is low, and the economical efficiency is poor.

In order to solve the problems, the conventional scheme is to use a plurality of heat exchangers in a matched manner to improve the heat exchange efficiency, and a specific method is to pass tail gas combusted by a boiler through the plurality of heat exchangers in sequence to improve the cooling time of the tail gas, so that the heat exchange efficiency is improved, but some problems also exist in application.

SUMMERY OF THE UTILITY MODEL

For solving the problem mentioned in the background art, the utility model aims to provide a waste heat recovery device for heat supply boiler.

In order to realize the above object, the technical scheme of the utility model is that:

the utility model provides a waste heat recovery device for heat supply boiler, includes first casing and the second casing that arranges along the horizontal direction, first casing and second casing are connected and the inner chamber of first casing and second casing is linked together, the upper and lower both ends in the first casing are equipped with first top chamber and first bottom chamber respectively, be connected with a plurality of first heat exchange tubes between first top chamber and the first bottom chamber, the both ends of first heat exchange tube communicate with first top chamber and first bottom chamber respectively, the top of first casing is connected with the steam pipe, the steam pipe with first top chamber intercommunication, the outside of steam pipe is equipped with presss from both sides the cover, the top that presss from both sides the cover is connected with the outlet pipe, the sub-unit connection that presss from both sides the cover has the oral siphon, outlet pipe and oral siphon all with the inner chamber intercommunication that presss from both sides the cover, the bottom of first casing is connected with first inlet tube, first inlet tube and first bottom chamber intercommunication, the upper and lower both ends in the second casing are equipped with second top chamber and second bottom chamber respectively, be connected with a plurality of second top chamber and second bottom chamber between second top chamber and second bottom chamber, the inlet pipe intercommunication of second shell, the top pipe and the lateral part of second shell is equipped with the outlet of second end of second heat exchange tube, the top pipe and the top pipe intercommunication of second shell, the top pipe is equipped with the outlet pipe, the outlet pipe is connected with the second shell, the inlet pipe is connected with the tail gas outlet pipe, the inlet pipe is connected with the second shell.

Furthermore, the first heat exchange tube and the second heat exchange tube are finned tubes.

Further, upper and lower both ends in the first casing rigid coupling respectively have first hood and first end cover, the inner wall of first hood and the interior roof of first casing form first overhead chamber, the inner wall of first end cover and the interior bottom wall of first casing form first end chamber, the both ends of first heat exchange tube rigid coupling respectively are in on first hood and the first end cover, upper and lower both ends in the second casing rigid coupling respectively have second hood and second end cover, the inner wall of second hood and the interior top wall of second casing form second overhead chamber, the inner wall of second end cover and the interior bottom wall of second casing form second end chamber, the both ends of second heat exchange tube rigid coupling respectively are in on second hood and the second end cover.

The utility model has the advantages that: the first heat exchange tubes and the second heat exchange tubes are arranged, so that the heat of the tail gas can be fully absorbed, and the heat exchange efficiency is ensured; the water through first heat exchange tube forms steam, and the water through the second heat exchange tube can become hot water, and hot water enters into and presss from both sides the cover in alright play the heat preservation effect to the steam pipe, can effectively avoid the steam condensation in the steam pipe, both effectually utilized the heat that gives off in the hot water transmission course, need not set up the heat preservation intermediate layer in the outside of steam pipe again, and the utilization ratio of tail gas waste heat improves greatly, has effectively practiced thrift the maintenance cost of steam pipe again.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention.

Description of the figure numbering: 1. the first shell, 11, the first top cavity, 12, the first bottom cavity, 13, the first heat exchange tube, 131, the first top cover, 132, the first bottom cover, 14, the steam tube, 15, the jacket, 151, the cavity, 152, the outlet pipe, 153, the inlet pipe, 16, the first inlet pipe, 17, the tail gas import, 2, the second shell, 21, the second top cavity, 22, the second bottom cavity, 23, the second heat exchange tube, 231, the second top cover, 232, the second bottom cover, 24, the drain pipe, 25, the second inlet pipe, 26, the tail gas export.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in fig. 1-2, a waste heat recovery device for a heating boiler comprises a first shell 1 and a second shell 2 which are arranged on the left and right, the first shell 1 and the second shell 2 are both in a square tube shape, the first shell 1 and the second shell 2 are butted through flanges, a first top cavity 11 and a first bottom cavity 12 are respectively arranged at the upper end and the lower end in the first shell 1, a plurality of first heat exchange tubes 13 are connected between the first top cavity 11 and the first bottom cavity 12, the first heat exchange tubes 13 are vertically arranged, all the first heat exchange tubes 13 are arranged in a rectangular shape, two ends of the first heat exchange tubes 13 are respectively communicated with the first top cavity 11 and the first bottom cavity 12, a steam tube 14 is welded at the top of the first shell 1, the steam tube 14 is vertically arranged, the steam tube 14 is communicated with the first top cavity 11, a jacket 15 is arranged outside the steam tube 14, the jacket 15 is in a cylindrical structure with an opening at the top end, the length of the jacket 15 is slightly smaller than that of the jacket 15, the bottom of the jacket 15 is welded on the first shell 1, the bottom of the jacket 15, the steam tube 14 penetrates through the jacket 15, a second jacket 15, a water inlet tube 153 is welded at the top end of the top of the second jacket 21, a second shell 21 and a second water inlet tube 21, a second water inlet tube 21 is welded at the top of the second jacket 2, a plurality of the second water inlet tube 21 is welded with the second water inlet tube 21, a plurality of the second water inlet tube 21, a second water inlet tube 21 and a second water inlet tube 21 are welded at the top cavity 21, drain pipe 24 and second top chamber 21 intercommunication, the mouth of pipe butt joint of flange and oral siphon 153 is passed through to the one end that drain pipe 24 kept away from second top chamber 21, and the bottom welding of second casing 2 has second inlet tube 25, and second inlet tube 25 and second bottom chamber 22 intercommunication, and one side that first casing 1 deviates from second casing 2 is tail gas inlet 17, and one side that second casing 2 deviates from first casing 1 is tail gas outlet 26.

In this embodiment, the first heat exchange tube 13 and the second heat exchange tube 23 are both finned tubes, and the finned tubes are used, so that the contact area between the finned tubes and the combustion exhaust gas of the boiler is large, and the heat exchange efficiency can be effectively improved.

In this embodiment, the upper end and the lower end of the first casing 1 are welded with the first top cover 131 and the first bottom cover 132 respectively, the inner wall of the first top cover 131 and the inner top wall of the first casing 1 form the first top cavity 11, the inner wall of the first bottom cover 132 and the inner bottom wall of the first casing 1 form the first bottom cavity 12, the two ends of the first heat exchange tube 13 are welded on the first top cover 131 and the first bottom cover 132 respectively, the upper end and the lower end of the second casing 2 are welded with the second top cover 231 and the second bottom cover 232 respectively, the inner wall of the second top cover 231 and the inner top wall of the second casing 2 form the second top cavity 21, the inner wall of the second bottom cover 232 and the inner bottom wall of the second casing 2 form the second bottom cavity 22, and the two ends of the second heat exchange tube 23 are welded on the second top cover 231 and the second bottom cover 232 respectively, and the structural design is reasonable, and the processing is convenient.

When the boiler is used, the first water inlet pipe 16 and the second water inlet pipe 25 are both connected with a water supply source (not released in the figure), the steam pipe 14 is connected with equipment (not released in the figure) needing steam, the water outlet pipe 152 is connected with a hot water collecting device (not released in the figure), combustion tail gas of the boiler is introduced into the first shell 1 through the tail gas inlet 17, water is continuously supplied to the first water inlet pipe 16 and the second water inlet pipe 25, the temperature of the tail gas is reduced after heat exchange through the plurality of first heat exchange pipes 13, water passing through the first heat exchange pipes 13 is changed into steam and is discharged through the steam pipe 14, the tail gas with the reduced temperature enters the second shell 2, the tail gas is discharged through the tail gas outlet 26 after passing through the plurality of second heat exchange pipes 23 and enters a post-process, water in the second heat exchange pipes 23 can be heated under the residual heat of the tail gas to form hot water, the hot water can play a heat preservation effect on the steam pipe 14 after entering the cavity 151, condensation of the steam in the steam pipe 14 is effectively avoided, and the heat emitted in the transmission process of the hot water is effectively utilized.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A waste heat recovery device for a heating boiler comprises a first shell and a second shell which are arranged along the horizontal direction, wherein the first shell and the second shell are connected, and the inner cavities of the first shell and the second shell are communicated, the waste heat recovery device is characterized in that the upper end and the lower end in the first shell are respectively provided with a first top cavity and a first bottom cavity, a plurality of first heat exchange tubes are connected between the first top cavity and the first bottom cavity, the two ends of each first heat exchange tube are respectively communicated with the first top cavity and the first bottom cavity, the top of the first shell is connected with a steam tube, the steam tube is communicated with the first top cavity, the outside of the steam tube is provided with a jacket, the top of the jacket is connected with a water outlet tube, the lower part of the jacket is connected with a water inlet tube, and the water inlet tube and the water outlet tube are both communicated with the inner cavity of the jacket, the bottom of first casing is connected with first inlet tube, first inlet tube and first bottom chamber intercommunication, upper and lower both ends in the second casing are equipped with second top chamber and second bottom chamber respectively, be connected with a plurality of second heat exchange tubes between second top chamber and the second bottom chamber, the both ends of second heat exchange tube communicate with second top chamber and second bottom chamber respectively, the top of second casing is connected with the drain pipe, drain pipe and second top chamber intercommunication, the one end and the oral siphon intercommunication in second top chamber are kept away from to the drain pipe, the bottom of second casing is connected with the second inlet tube, second inlet tube and second bottom chamber intercommunication, the lateral part of first casing is equipped with the tail gas import, the lateral part of second casing is equipped with the tail gas export.

2. A heat recovery device for a heating boiler according to claim 1, wherein the first heat exchange tube and the second heat exchange tube are finned tubes.

3. A heat recovery device for a heating boiler, according to claim 1, characterized in that the upper and lower ends in the first housing are respectively and fixedly connected with a first top cover and a first bottom cover, the inner wall of the first top cover and the inner top wall of the first housing form a first top cavity, the inner wall of the first bottom cover and the inner bottom wall of the first housing form a first bottom cavity, the two ends of the first heat exchange tube are respectively and fixedly connected to the first top cover and the first bottom cover, the upper and lower ends in the second housing are respectively and fixedly connected with a second top cover and a second bottom cover, the inner wall of the second top cover and the inner top wall of the second housing form a second top cavity, the inner wall of the second bottom cover and the inner bottom wall of the second housing form a second bottom cavity, and the two ends of the second heat exchange tube are respectively and fixedly connected to the second top cover and the second bottom cover.