CN210951367U

CN210951367U - Boiler flue gas waste heat recovery device

Info

Publication number: CN210951367U
Application number: CN201921642698.1U
Authority: CN
Inventors: 张明; 饶长宁; 汤恺南
Original assignee: Nanjing Energy Corp
Current assignee: Nanjing Energy Corp
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-07-07
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses a boiler flue gas waste heat recovery device, including the under casing, the flue gas inlet has been seted up to the one end surface of under casing, the exhanst gas outlet has been seted up to the other end surface of under casing, the upper end fixed surface of under casing installs the water tank, the water tank comprises urceolus, inner tube and heat preservation, the inner tube is located the inside of urceolus, the fixed position that the one end of water tank is located the top of exhanst gas outlet installs cold water inlet, the fixed position that the other end of water tank is located the top of exhanst gas inlet installs the drain, the fixed position that the other end of water tank is located the top of drain installs hot water outlet, the fixed mounting in inside of under casing has the hot plate, the hot plate comprises metal frame, heat-collecting. The utility model discloses can improve the recovery efficiency of boiler flue gas waste heat to can improve waste heat recovery device's result of use, have the practicality.

Description

Boiler flue gas waste heat recovery device

Technical Field

The utility model relates to a waste heat recovery device technical field especially relates to a boiler flue gas waste heat recovery device.

Background

The waste of the energy can be caused by the direct emission of the flue gas, the waste heat in the boiler flue gas is fully utilized, the waste heat of the boiler flue gas is generally recovered by a waste heat recovery device at present, and then the cold water is heated by the waste heat of the boiler flue gas, so that the waste heat of the boiler flue gas can be fully utilized.

But current boiler flue gas waste heat recovery device has certain defect when using, and when the device utilized the waste heat to cold water heating, the heat in the heating process water tank gived off very fast, and cold water can not quick heating, and the hot plate among the current waste heat recovery device adopts plate-type structure moreover, and heat-conduction efficiency is low, causes waste heat recovery efficiency not high, has brought certain influence for the use, consequently, makes the improvement to boiler flue gas waste heat recovery device now.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a boiler flue gas waste heat recovery device.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a boiler flue gas waste heat recovery device comprises a bottom box, wherein a flue gas inlet is formed in the outer surface of one end of the bottom box, a flue gas outlet is formed in the outer surface of the other end of the bottom box, a water tank is fixedly arranged on the outer surface of the upper end of the bottom box, the water tank is composed of an outer barrel, an inner barrel and a heat insulation layer, the inner barrel is positioned in the outer barrel, the heat insulation layer is filled in a position between the outer barrel and the inner barrel, a cold water inlet is fixedly arranged in a position, above the flue gas outlet, at one end of the water tank, a sewage discharge port is fixedly arranged in a position, above the flue gas inlet, at the other end of the water tank, a hot water outlet is fixedly arranged in a position, above the sewage discharge port, at the other end of the water tank, a heating plate is fixedly arranged in the, the heating pipe is fixedly connected to the upper end of the metal frame.

Preferably, the metal frame is located inside the bottom box, the heating pipe is located inside the water tank, the heating pipe is of an annular structure, and the heating pipe is made of copper.

Preferably, the heat-insulating layer is made of polyurethane foam, and the outer cylinder and the inner cylinder are both made of alloy steel plates.

Preferably, the outer surface of the upper end of the water tank is fixedly provided with a steam outlet, and the position of the upper end of the water tank, which is positioned on one side of the steam outlet, is fixedly provided with a pressure gauge.

Preferably, the number of the heating plates is a plurality of groups, and the heating plates are distributed in the bottom box in parallel with the smoke inlet and the smoke outlet.

Preferably, the heat collecting net is formed by alternately weaving a plurality of groups of copper wires, and the heating plate is fixedly connected with the bottom box through a metal frame.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, the outer cylinder, the inner cylinder and the heat preservation layer are arranged, so that the heat loss in the water tank can be avoided when the waste heat is recycled and heated, thereby preventing the heat loss and improving the use effect of the flue gas recovery device;

2. in the utility model, through the metal frame, the heat collecting net and the heating pipe, the heating pipe adopts a copper annular structure, the heating pipe can not influence the flow of water in the water tank, the resistance area is reduced, and the heating pipe can be fully contacted with water, the heat conduction efficiency is improved, the flue gas waste heat can quickly heat the cold water in the water tank, and the waste heat recovery efficiency is improved;

to sum up, the utility model discloses can improve the recovery efficiency of boiler flue gas waste heat to can improve waste heat recovery device's result of use, have the practicality.

Drawings

Fig. 1 is a schematic view of the overall structure of a boiler flue gas waste heat recovery device provided by the present invention;

FIG. 2 is a structural composition diagram of a water tank of the boiler flue gas waste heat recovery device provided by the present invention;

fig. 3 is the utility model provides a structural schematic diagram of a heating plate of a boiler flue gas waste heat recovery device.

In the figure: 1 bottom box, 2 flue gas inlets, 3 flue gas outlets, 4 water tanks, 5 outer cylinders, 6 inner cylinders, 7 heat preservation layers, 8 cold water inlets, 9 sewage outlets, 10 hot water outlets, 11 steam outlets, 12 heating plates, 13 metal frames, 14 heat collecting nets and 15 heating pipes.

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.

Referring to fig. 1-3, a boiler flue gas waste heat recovery device comprises a bottom case 1, a flue gas inlet 2 is arranged on the outer surface of one end of the bottom case 1, a flue gas outlet 3 is arranged on the outer surface of the other end of the bottom case 1, a water tank 4 is fixedly arranged on the outer surface of the upper end of the bottom case 1, the water tank 4 is composed of an outer cylinder 5, an inner cylinder 6 and a heat insulation layer 7, the inner cylinder 6 is positioned inside the outer cylinder 5, the heat insulation layer 7 is filled in the position between the outer cylinder 5 and the inner cylinder 6, a cold water inlet 8 is fixedly arranged on the position, which is positioned above the flue gas outlet 3, of one end of the water tank 4, a sewage discharge outlet 9 is fixedly arranged on the position, which is positioned above the flue gas inlet 2, of the other end of the water tank 4, a hot water outlet 10 is fixedly arranged on the position, which, the heat collecting net 14 is positioned inside the metal frame 13, and the heating pipe 15 is fixedly connected to the upper end of the metal frame 13.

Metal frame 13 is located the inside of under casing 1, heating pipe 15 is located the inside of water tank 4, heating pipe 15 is the loop configuration, the material of heating pipe 15 is copper, the material of heat preservation 7 is polyurethane foam, urceolus 5 is the alloy steel board with the material of inner tube 6, the upper end external fixed surface of water tank 4 installs steam outlet 11, the fixed position that the upper end of water tank 4 is located one side of steam outlet 11 installs the manometer, the quantity of hot plate 12 is a plurality of groups, a plurality of groups hot plate 12 are parallel distribution in under casing 1's inside and flue gas inlet 2 and exhanst gas outlet 3, heat-collecting net 14 is alternately woven by a plurality of groups copper wire and constitutes, hot plate 12 passes through metal frame 13 and under casing 1 fixed connection.

The working principle is as follows: cold water is injected into the water tank 4 through the cold water inlet 8, smoke discharged by the boiler is sent into the bottom tank 1 through the smoke inlet 2, the smoke with waste heat is fully contacted with the heat collecting net 14 on the heating plate 12, the smoke waste heat heats the heat collecting net 14, the heat collecting net 14 transfers heat to the heating pipe 15 in the water tank 4 through the metal frame 13, the heating pipe 15 generates high temperature, the cold water in the water tank 4 is fully contacted with the heating pipe 15, then the heating pipe 15 heats the cold water, the heat collecting net 14 and the heating pipe 15 are both made of copper, good heat transfer can be carried out, the smoke waste heat is quickly transferred into the water tank 4 through the heating pipe 15, the heating pipe 15 is in an annular structure, the flowing of the water in the water tank 4 cannot be obstructed, the heated hot water is discharged for use through the hot water outlet 10, dirty impurities and the like in the water tank 4 are discharged through the sewage discharge port 9, and cold water steam is generated when the, steam is discharged through a steam outlet 11 on the water tank 4, so that the water tank 4 is prevented from being broken due to overlarge air pressure in the water tank 4, smoke passes through the pair of heating plates 12 and transfers heat to the water tank 4 through the heating plates 12, then the smoke is discharged through the smoke outlet 3, the water tank 4 consists of an outer cylinder 5 and an inner cylinder 6, and a heat insulation layer 7 is filled between the outer cylinder 5 and the inner cylinder 6 in a refilling mode, so that the heat loss in the water tank 4 can be avoided, and the using effect of the smoke waste heat recovery device is improved; the utility model discloses can improve the recovery efficiency of boiler flue gas waste heat to can improve waste heat recovery device's result of use, have the practicality.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a boiler flue gas waste heat recovery device, includes under casing (1), its characterized in that, flue gas inlet (2) have been seted up to the one end surface of under casing (1), exhanst gas outlet (3) have been seted up to the other end surface of under casing (1), the upper end external surface fixed mounting of under casing (1) has water tank (4), water tank (4) comprise urceolus (5), inner tube (6) and heat preservation (7), inner tube (6) are located the inside of urceolus (5), the position between urceolus (5) and inner tube (6) is filled in heat preservation (7), the fixed position that the one end of water tank (4) is located the top of exhanst gas outlet (3) installs cold water inlet (8), the fixed position that the other end of water tank (4) is located the top of flue gas inlet (2) has drain (9), the fixed position that the other end of water tank (4) is located the top of drain (9) installs hot water outlet (10) The heating plate (12) is fixedly mounted inside the bottom box (1), the heating plate (12) is composed of a metal frame (13), a heat collecting net (14) and a heating pipe (15), the heat collecting net (14) is located inside the metal frame (13), and the heating pipe (15) is fixedly connected to the upper end of the metal frame (13).

2. The boiler flue gas waste heat recovery device according to claim 1, wherein the metal frame (13) is located inside the bottom box (1), the heating pipe (15) is located inside the water tank (4), the heating pipe (15) is of an annular structure, and the heating pipe (15) is made of copper.

3. The boiler flue gas waste heat recovery device according to claim 1, wherein the heat insulation layer (7) is made of polyurethane foam, and the outer cylinder (5) and the inner cylinder (6) are both made of alloy steel plates.

4. The boiler flue gas waste heat recovery device according to claim 1, wherein a steam outlet (11) is fixedly installed on the outer surface of the upper end of the water tank (4), and a pressure gauge is fixedly installed at a position, located on one side of the steam outlet (11), of the upper end of the water tank (4).

5. The boiler flue gas waste heat recovery device according to claim 1, wherein the number of the heating plates (12) is a plurality of groups, and the groups of the heating plates (12) are distributed in parallel with the flue gas inlet (2) and the flue gas outlet (3) in the bottom box (1).

6. The boiler flue gas waste heat recovery device according to claim 1, wherein the heat collecting net (14) is formed by weaving a plurality of groups of copper wires in a crossed manner, and the heating plate (12) is fixedly connected with the bottom box (1) through a metal frame (13).