Boiler flue gas heat recovery and heat exchange device

Abstract

The invention relates to a boiler flue gas heat recovery and heat exchange device which comprises a boiler. A multi-fold metal pipeline is arranged in the heating box; a pure water heat exchange cavity is formed in the constant temperature box; a plurality of heat conduction columns are arranged at the bottom in the constant temperature box; the heat insulation columns are arranged at the tops of the corresponding heat conduction columns; pure water circulates in the pure water heat exchange cavity and the heating box, heat exchange of the pure water is achieved through the multi-fold metal pipeline by means of heat generated by smoke, the pure water after heat exchange enters the pure water heat exchange cavity, liquid needing to be heated is placed in the constant temperature box, and when the liquid needs to be heated, the pure water heat exchange cavity is controlled by the lifting mechanism to descend, so that the liquid needs to be heated. The pure water heat exchange cavity is in contact with the heat conduction column, heat of pure water passes through the heat conduction column to heat liquid, after the liquid is heated to the preset temperature, the pure water heat exchange cavity is in contact with the heat insulation column, continuous temperature rise of the liquid is avoided, the liquid is finally discharged from the second water pipe, and the purpose of heating the liquid to the preset temperature is achieved.

Description

Technical Field

[0001] The invention relates to the field of heat exchange devices, and in particular to a boiler flue gas heat recovery heat exchange device. Background Art

[0002] Heat recovery is an energy recovery technology. In many industrial processes, building environmental control, etc., a large amount of waste heat is generated. Heat recovery is to collect this waste heat and then use it in other links that require heat.

[0003] In factories, some production equipment (such as boilers) will generate high-temperature exhaust gas during operation. The heat recovery system can transfer the heat in the exhaust gas to materials that need to be preheated or used for heating buildings, etc., thereby improving energy utilization and reducing the additional energy consumed to meet heat needs.

[0004] However, heat recovery usually only collects heat, but cannot provide heat to directly heat the heated liquid to a solution of a preset temperature;

[0005] In summary, how to achieve heat exchange of liquid and heat the liquid to a preset temperature has become an urgent problem that researchers in this field need to solve. Summary of the invention

[0006] The technical problem to be solved by the present invention is: how to realize heat exchange of liquid and heat the liquid to a preset temperature;

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0008] The present invention is a boiler flue gas heat recovery and heat exchange device, comprising: a boiler; a heating box, wherein a multi-fold metal pipe is arranged inside, wherein the inlet of the boiler is connected to one end of the multi-fold metal pipe through a first flue gas furnace pipe, and the other end of the multi-fold metal pipe is connected through a second flue gas furnace pipe; a constant temperature box having a first water pipe and a second water pipe, wherein a pure water heat exchange chamber with a serpentine structure controlled by a lifting mechanism is arranged inside, wherein the water outlet of the pure water heat exchange chamber is connected to the water inlet of the heating box through a pure water inlet pipe, and the water inlet of the pure water heat exchange chamber is connected to the water outlet of the heating box through a pure water outlet pipe; a plurality of heat-conducting columns, which are arranged at the bottom of the constant temperature box; and an insulating column, which is arranged at the corresponding positions of the heat-conducting columns. The top of the column; the water to be heated is introduced into the constant temperature box through the first water pipe, the boiler introduces the flue gas into the multi-fold metal pipe through the first flue gas furnace pipe, and exchanges heat with the pure water in the heating box. The flue gas after heat exchange is discharged from the second flue gas furnace pipe, and the pure water heated in the heating box is introduced into the pure water heat exchange chamber through the pure water outlet pipe. The pure water after heat exchange is re-introduced into the heating box through the pure water inlet pipe, and the pure water heat exchange chamber is driven downward by the lifting mechanism, and the pure water heat exchange chamber is switched from contacting with the adiabatic column to contacting with the heat conducting column, and the water in the constant temperature box is heated by the heat conducting column, and is discharged through the second water pipe after heating.

[0009] In this scheme, the boiler and the heating box are connected through the first smoke furnace pipe, and the heating box and the constant temperature box are connected through the pure water outlet pipe and the pure water inlet pipe. The constant temperature box has a first water pipe as an inlet and a second water pipe as an outlet;

[0010] Pure water is circulated in the pure water heat exchange chamber and the heating box. The heat generated by the flue gas is used to exchange heat with the pure water through the multi-fold metal pipe. The pure water after the heat exchange enters the pure water heat exchange chamber. The liquid to be heated is placed in the constant temperature box. When the liquid needs to be heated, the pure water heat exchange chamber is controlled to descend by the lifting mechanism, and the pure water heat exchange chamber is brought into contact with the heat-conducting column. The heat of the pure water is used to heat the liquid through the heat-conducting column. When the liquid is heated to the preset temperature, the pure water heat exchange chamber is brought into contact with the insulating column to prevent the liquid from continuing to heat up. The liquid is finally discharged from the second water pipe, thereby achieving the purpose of heating the liquid to the preset temperature.

[0011] The structural design of the multi-fold metal pipe can improve the heat exchange efficiency between pure water and flue gas.

[0012] In order to illustrate the specific structure of the lifting mechanism, the lifting mechanism used in the present invention includes: a fixed seat, which is fixed to the inner wall of the constant temperature box; a support plate, which is fixed to the outer wall of the pure water heat exchange chamber; a hydraulic cylinder, whose fixed end is connected to the fixed seat and whose movable end is connected to the support plate;

[0013] The extension and retraction of the hydraulic cylinder realizes the lifting and lowering of the pure water heat exchange chamber relative to the constant temperature box.

[0014] In order to realize the circulation of pure water in the heating box and the pure water heat exchange chamber, the present invention adopts a water pump for pure water circulation provided on the pure water outlet pipe;

[0015] The water pump provides power to circulate pure water in a one-way manner in the heating box and the pure water heat exchange chamber.

[0016] In order to achieve the heat preservation of the pure water heat exchange cavity and facilitate the contact between the heat exchange cavity and the heat-conducting column or the insulation column, the present invention adopts that the outer wall of the pure water heat exchange cavity is covered with a heat-insulating layer, and the pure water heat exchange cavity forms a heat exchange gap for the heat-conducting column and the insulation column to be inserted;

[0017] The heat loss in the pure water heat exchange chamber during the heat exchange process is avoided by setting a thermal insulation layer. Since the pure water heat exchange chamber has a serpentine structure, the pure water heat exchange chamber forms a heat exchange gap for inserting the heat conducting column and the insulation column.

[0018] Beneficial effects of the present invention: The present invention is a boiler flue gas heat recovery heat exchange device, which circulates pure water in a pure water heat exchange chamber and a heating box. The heat generated by the flue gas is used to exchange heat with the pure water through a multi-fold metal pipe. The pure water after the heat exchange enters the pure water heat exchange chamber, and the liquid to be heated is placed in a constant temperature box. When the liquid needs to be heated, the pure water heat exchange chamber is controlled to descend by a lifting mechanism, and the pure water heat exchange chamber is contacted with a heat-conducting column. The heat of the pure water is used to heat the liquid through the heat-conducting column. When the liquid is heated to a preset temperature, the pure water heat exchange chamber is contacted with an insulating column to prevent the liquid from continuing to heat up. The liquid is finally discharged from the second water pipe, thereby achieving the purpose of heating the liquid to a preset temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 is a cross-sectional view of the present invention;

[0022] In the figure: 1-boiler, 11-first smoke furnace pipe, 12-second smoke furnace pipe, 13-pure water inlet pipe, 14-pure water outlet pipe, 15-water pump, 2-heating box, 21-multi-fold metal pipe, 3-constant temperature box, 31-first water pipe, 32-second water pipe, 33-pure water heat exchange cavity, 34-heat conducting column, 35-insulating column, 36-insulating layer, 37-heat exchange gap, 41-fixed seat, 42-support plate, 43-hydraulic cylinder. DETAILED DESCRIPTION

[0023] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0024] like Figure 1-2 As shown, the present invention is a boiler flue gas heat recovery and heat exchange device, comprising: a boiler 1; a heating box 2, wherein a multi-fold metal pipe 21 is arranged inside, wherein the inlet of the boiler 1 is connected to one end of the multi-fold metal pipe 21 through a first flue gas furnace pipe 11, and the other end of the multi-fold metal pipe 21 is connected through a second flue gas furnace pipe 12; a constant temperature box 3 having a first water pipe 31 and a second water pipe 32, wherein a pure water heat exchange chamber 33 of a serpentine structure controlled by a lifting mechanism is arranged inside, wherein the water outlet of the pure water heat exchange chamber 33 is connected to the water inlet of the heating box 2 through a pure water inlet pipe 13, and the water inlet of the pure water heat exchange chamber 33 is connected to the water outlet of the heating box 2 through a pure water outlet pipe 14; a plurality of heat-conducting columns 34, which are arranged at the bottom of the constant temperature box 3; and an insulating column 35, which is arranged at the corresponding The top of the heat-conducting column 34; the water to be heated is introduced into the constant temperature box 3 through the first water pipe 31, the boiler 1 introduces the flue gas into the multi-fold metal pipe 21 through the first flue gas furnace pipe 11, and exchanges heat with the pure water in the heating box 2. The flue gas after heat exchange is discharged from the second flue gas furnace pipe 12, and the heated pure water in the heating box 2 is introduced into the pure water heat exchange chamber 33 through the pure water outlet pipe 14. The pure water after heat exchange is re-introduced into the heating box 2 through the pure water inlet pipe 13, and the pure water heat exchange chamber 33 is driven downward by the lifting mechanism, and the pure water heat exchange chamber 33 is switched from contacting with the insulating column 35 to contacting with the heat-conducting column 34, and the water in the constant temperature box 3 is heated by the heat-conducting column 34, and is discharged through the second water pipe 32 after heating.

[0025] In this solution, the boiler 1 and the heating box 2 are connected via a first smoke furnace pipe 11, and the heating box 2 and the constant temperature box 4 are connected via a pure water outlet pipe 14 and a pure water inlet pipe 13. The constant temperature box 3 has a first water pipe 31 as an inlet and a second water pipe 32 as an outlet.

[0026] Pure water is circulated in the pure water heat exchange chamber 33 and the heating box 2. The heat generated by the flue gas is used to exchange heat with the pure water through the multi-fold metal pipe 21. The pure water after heat exchange enters the pure water heat exchange chamber 33. The liquid to be heated is placed in the constant temperature box 3. When the liquid needs to be heated, the pure water heat exchange chamber 33 is controlled to descend by the lifting mechanism, and the pure water heat exchange chamber 33 is brought into contact with the heat conducting column 34. The heat of the pure water is used to heat the liquid through the heat conducting column 34. When the liquid is heated to the preset temperature, the pure water heat exchange chamber 33 is brought into contact with the insulating column 35 to prevent the liquid from continuing to heat up. The liquid is finally discharged from the second water pipe 32, thereby achieving the purpose of heating the liquid to the preset temperature.

[0027] The structural design of the multi-fold metal pipe 31 can improve the heat exchange efficiency between pure water and flue gas.

[0028] like Figure 1-2 As shown, in order to illustrate the specific structure of the lifting mechanism, the lifting mechanism adopted by the present invention includes: a fixed seat 41, which is fixed to the inner wall of the constant temperature box 3; a support plate 42, which is fixed to the outer wall of the pure water heat exchange chamber 33; a hydraulic cylinder 43, whose fixed end is connected to the fixed seat 41, and whose movable end is connected to the support plate 42;

[0029] The extension and retraction of the hydraulic cylinder 43 realizes the lifting and lowering of the pure water heat exchange chamber 33 relative to the constant temperature box 3 .

[0030] like Figure 1-2 As shown, in order to realize the circulation of pure water in the heating box and the pure water heat exchange chamber, the present invention adopts that a water pump 15 for pure water circulation is provided on the pure water outlet pipe 14;

[0031] The water pump 15 provides power to circulate the pure water in a one-way manner in the heating box 2 and the pure water heat exchange chamber 33 .

[0032] like Figure 1-2 As shown, in order to achieve the heat preservation of the pure water heat exchange cavity and facilitate the contact between the heat exchange cavity and the heat-conducting column or the insulation column, the present invention adopts that the outer wall of the pure water heat exchange cavity 33 is covered with a heat-insulating layer 36, and the pure water heat exchange cavity 33 forms a heat exchange gap 37 for the heat-conducting column 34 and the insulation column 35 to be inserted;

[0033] The heat loss of the pure water heat exchange chamber 33 during the heat exchange process is avoided by providing the heat insulation layer 36. Since the pure water heat exchange chamber 33 is a serpentine structure, the pure water heat exchange chamber 33 forms a heat exchange gap 37 for the heat conductive column 34 and the insulation column 35 to be inserted.

[0034] In addition, using pure water as the intermediate medium in the heat exchange process can effectively ensure that the water to be heated is not affected by the flue gas, and can also increase the service life of the heat exchange device.

[0035] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A boiler flue gas heat recovery and heat exchange device, characterized in that: include: boiler; A heating box is provided with a multi-fold metal pipe inside, the inlet of the boiler is connected to one end of the multi-fold metal pipe through a first smoke furnace pipe, and the other end of the multi-fold metal pipe is connected through a second smoke furnace pipe; A constant temperature box having a first water pipe and a second water pipe, wherein a pure water heat exchange chamber with a serpentine structure is arranged, the water outlet of the pure water heat exchange chamber is connected to the water inlet of the heating box through a pure water inlet pipe, and the water inlet of the pure water heat exchange chamber is connected to the water outlet of the heating box through a pure water outlet pipe; A plurality of heat-conducting columns are arranged at the bottom of the constant temperature box; and an insulating column, which is arranged on the top of the corresponding heat-conducting column; The water to be heated is introduced into the constant temperature box through the first water pipe, and the boiler introduces the flue gas into the multi-fold metal pipe through the first flue gas furnace pipe to exchange heat with the pure water in the heating box. The flue gas after heat exchange is discharged from the second flue gas furnace pipe, and the heated pure water in the heating box is introduced into the pure water heat exchange chamber through the pure water outlet pipe. The pure water after heat exchange is re-introduced into the heating box through the pure water inlet pipe, and the pure water heat exchange chamber is driven downward by the lifting mechanism to switch the contact between the pure water heat exchange chamber and the heat conductive column from the insulating column to the heat conductive column. The water in the constant temperature box is heated by the heat conductive column and is discharged through the second water pipe after heating.

2. A boiler flue gas heat recovery and heat exchange device according to claim 1, characterized in that: The lifting mechanism comprises: A fixing seat, which is fixed to the inner wall of the constant temperature box; A support plate fixed to the outer wall of the pure water heat exchange chamber; A hydraulic cylinder, a fixed end of which is aligned with the fixing seat, and a movable end of which is connected with the supporting plate.

3. The boiler flue gas heat recovery and heat exchange device according to claim 1, characterized in that: The pure water outlet pipe is provided with a water pump for pure water circulation.

4. The boiler flue gas heat recovery and heat exchange device according to claim 1, characterized in that: The outer wall of the pure water heat exchange chamber is covered with a heat insulation layer, and the pure water heat exchange chamber forms a heat exchange gap for the heat conductive column and the insulation column to be inserted.

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