CN220582477U

CN220582477U - Flue gas waste heat recovery heat exchanger of thermal power plant

Info

Publication number: CN220582477U
Application number: CN202322245204.9U
Authority: CN
Inventors: 陈飞; 陈刚
Original assignee: Anhui Qirui Control Equipment Co ltd
Current assignee: Anhui Qirui Control Equipment Co ltd
Priority date: 2023-08-21
Filing date: 2023-08-21
Publication date: 2024-03-12
Anticipated expiration: 2033-08-21

Abstract

The utility model discloses a flue gas waste heat recovery heat exchanger of a thermal power plant, which relates to the technical field of heat exchangers and comprises a barrel assembly, wherein a plurality of groups of heat exchange assemblies are installed on the side wall of the barrel assembly at equal intervals, a water inlet pipe is commonly connected above the inlet ends of the plurality of groups of heat exchange assemblies, a water outlet pipe is commonly connected below the outlet ends of the plurality of groups of heat exchange assemblies, the barrel assembly comprises a barrel, a plurality of groups of through grooves are formed in the side wall of the barrel at equal intervals, bolts are connected to the side surface of the barrel and the corner corresponding to each group of through grooves, nuts are connected to the external threads of each group of bolts, the heat exchange assembly comprises a mounting plate, a tube is commonly connected with the top and the bottom of the mounting plate in a penetrating manner, a baffle plate is connected to the side surface of the mounting plate and is positioned on one side of the tube, and the barrel assembly and the plurality of groups of heat exchange assemblies are provided with a detachable structure, so that the disassembly, the fin walls and the baffle plate are convenient to disassemble, overhaul and clean after long-time use.

Description

Flue gas waste heat recovery heat exchanger of thermal power plant

Technical Field

The utility model relates to the technical field of heat exchangers, in particular to a heat exchanger for recovering flue gas waste heat of a thermal power plant.

Background

At present, the waste heat of the flue gas of a boiler of a thermal power plant is rarely used for recycling, and the flue gas loss has the largest proportion in the heat loss of the boiler, so that if the waste heat can be recycled and used for central heating, the heating capacity of the thermal power plant can be improved on the premise of not consuming more coal, thereby achieving the purposes of energy conservation and emission reduction;

through retrieval, a heat exchanger (publication number: CN 217541561U) for efficiently recycling waste heat of flue gas is disclosed, cold water enters a tube array from a water inlet pipe through a branch pipe, the tube array with surrounding fin walls can accelerate the absorption of gas temperature, the purpose of heating the cold water is achieved, thereby achieving the heating requirement by using hot water, promoting the energy saving and consumption reduction of enterprises, and improving the waste heat recovery rate;

however, the inlet end and the outlet end of the tube array and the side wall of the baffle plate are connected, and because the heat exchanger is used for a long time, the foreign matters such as greasy dirt and oil dirt carried by the smoke are attached to the surfaces of the tube array and the baffle plate.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides a heat exchanger for recovering flue gas waste heat of a thermal power plant, which solves the problems in the background art.

In order to achieve the above purpose, the utility model is realized by the following technical scheme: the utility model provides a flue gas waste heat recovery heat exchanger of steam power plant, includes barrel subassembly, the equidistant multiunit heat transfer subassembly of installing of lateral wall of barrel subassembly, multiunit heat transfer subassembly's entrance point top is connected with the inlet tube jointly, multiunit heat transfer subassembly's exit end below is connected with the outlet pipe jointly;

the cylinder assembly comprises a cylinder, a plurality of groups of through grooves are formed in the side wall of the cylinder at equal intervals, bolts are connected to the side face of the cylinder and the corners corresponding to the through grooves of each group, and nuts are connected to the external threads of each group of bolts;

the heat exchange assembly comprises a mounting plate, the top and the bottom of the mounting plate are connected with a tube array in a penetrating manner, a baffle plate is connected to one side of the side face of the mounting plate and located on one side of the tube array, and bolt holes are formed in corners of each group of the mounting plate.

As a further technical scheme of the utility model, sealing gaskets are arranged outside the adjacent four groups of bolts and positioned on the outer side of the cylinder body.

As a further technical scheme of the utility model, the positions of each group of mounting plates and each group of through grooves are matched, each group of mounting plates is positioned outside four adjacent groups of bolts, and the side surfaces of each group of mounting plates are attached to the side surfaces of each group of sealing gaskets.

As a further technical scheme of the utility model, the middle sections of the areas of each group of the tubes are of an S-shaped structure and are positioned in the cylinder body, and a plurality of groups of surrounding fin walls are connected at equal intervals in the middle sections of the areas of each group of the tubes.

As a further technical scheme of the utility model, the inlet end and the outlet end of each group of the tubes are in an L-shaped structure and are positioned above and below one side of the cylinder.

As a further technical scheme of the utility model, a plurality of groups of baffle plates are positioned in the cylinder body, and the baffle plates are in an S-shaped structure.

Advantageous effects

The utility model provides a flue gas waste heat recovery heat exchanger of a thermal power plant. Compared with the prior art, the method has the following beneficial effects:

1. a heat exchanger for recovering flue gas waste heat of a thermal power plant is characterized in that a barrel assembly with a detachable structure and a plurality of groups of heat exchange assemblies are arranged, so that the disassembly, the overhaul and the cleaning are convenient after a tube array, a surrounding fin wall and a baffle plate are used for a long time.

2. A heat exchanger for recovering flue gas waste heat of a thermal power plant is characterized in that each group of mounting plates are arranged outside four groups of adjacent bolts, the mounting plates are further fixed outside a cylinder body through a plurality of groups of nuts, and the cylinder body and the mounting plates are enabled to have good sealing performance through the bolts, the nuts and sealing gaskets, and are convenient to detach.

Drawings

FIG. 1 is a schematic diagram of a heat exchanger for recovering flue gas waste heat in a thermal power plant;

fig. 2 is a schematic diagram of a split structure of a flue gas waste heat recovery heat exchanger of a thermal power plant;

FIG. 3 is a schematic structural view of a barrel assembly in a flue gas waste heat recovery heat exchanger of a thermal power plant;

fig. 4 is a schematic structural view of a heat exchange assembly in a flue gas waste heat recovery heat exchanger of a thermal power plant.

In the figure: 1. a barrel assembly; 11. a cylinder; 12. a through groove; 13. a bolt; 14. a sealing gasket; 15. a nut; 2. a heat exchange assembly; 21. a mounting plate; 22. a tube array; 23. surrounding the fin wall; 24. a baffle plate; 25. bolt holes; 3. a water inlet pipe; 4. and a water outlet pipe.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, the utility model provides a technical scheme of a flue gas waste heat recovery heat exchanger of a thermal power plant, which comprises the following steps: the utility model provides a flue gas waste heat recovery heat exchanger of steam power plant, includes barrel subassembly 1, and multiunit heat transfer subassembly 2 are installed to barrel subassembly 1's lateral wall equidistant, and multiunit heat transfer subassembly 2's entrance point top is connected with inlet tube 3 jointly, and multiunit heat transfer subassembly 2's exit end below is connected with outlet pipe 4 jointly.

Referring to fig. 3, the barrel assembly 1 includes a barrel 11, a plurality of groups of through grooves 12 are provided on the side wall of the barrel 11 at equal intervals, bolts 13 are connected to the sides of the barrel 11 and corresponding to the corners of each group of through grooves 12, nuts 15 are connected to the external threads of each group of bolts 13, and sealing gaskets 14 are provided on the outer sides of the adjacent four groups of bolts 13 and located on the outer sides of the barrel 11.

It should be noted that, the size of each group of through grooves 12 is slightly smaller than the size of each group of mounting plates 21, each group of sealing gaskets 14 is located between each group of mounting plates 21 and the cylinder 11, each group of mounting plates 21 is mounted outside four adjacent groups of bolts 13, then the mounting plates 21 are fixed outside the cylinder 11 through a plurality of groups of nuts 15, the cylinder 11 and the mounting plates 21 have good sealing performance through the bolts 13, the nuts 15 and the sealing gaskets 14, and the heat exchange assembly 2 is convenient to disassemble, overhaul and clean.

Referring to fig. 4, the heat exchange assembly 2 includes a mounting plate 21, the top and the bottom of the mounting plate 21 are connected with a tube array 22 in a penetrating manner, a side surface of the mounting plate 21 is connected with a baffle plate 24 on one side of the tube array 22, the corner of each group of mounting plate 21 is provided with a bolt hole 25, each group of mounting plates 21 is matched with the position of each group of through slots 12, each group of mounting plates 21 is located outside four groups of adjacent bolts 13, the side surface of each group of mounting plates 21 is attached to the side surface of each group of sealing gaskets 14, the middle section of each group of tube array 22 is in an S-shaped structure and is located inside the cylinder 11, the middle section of each group of tube array 22 is connected with a plurality of groups of surrounding fin walls 23 at equal intervals, the inlet end and the outlet end of each group of tube array 22 are in an L-shaped structure and are located above and below one side of the cylinder 11, and the plurality of groups of baffle plates 24 are located inside the cylinder 11 and the baffle plate 24 is in an S-shaped structure.

It should be noted that, the multiple groups of baffle plates 24 are distributed in the barrel 11 in an S-shaped structure, so that when the flue gas passes through the interior of the barrel 11, the flow path of the flue gas is increased, and then the heat in the flue gas is recovered by the cold water in each group of tubes 22 through multiple groups of surrounding fin walls 23;

when the mounting plate 21 is disassembled, the tube nest 22 and the baffle plate 24 can be removed from the cylinder 11, so that the tube nest 22 and the baffle plate 24 can be overhauled and cleaned conveniently.

The working principle of the utility model is as follows: when the flue gas heat recovery device is used, the flow path of the flue gas is increased through the plurality of groups of baffle plates 24 in the cylinder 11, then the water inlet pipe 3 shunts cold water into the plurality of groups of tubes 22, the cold water in each group of tubes 22 recovers heat in the flue gas through the plurality of groups of surrounding fin walls 23, and water carrying the heat is converged and discharged at the water outlet pipe 4, so that the flue gas waste heat recovery is realized;

when the tube nest 22 and the baffle plate 24 are required to be overhauled and cleaned, the four sets of nuts 15 corresponding to the mounting plate 21 are disassembled, so that the mounting plate 21 is taken down from the outer parts of the four sets of bolts 13, the tube nest 22 and the baffle plate 24 are removed from the inner part of the cylinder 11 to be overhauled and cleaned, after the overhauling and cleaning are finished, each set of mounting plate 21 is mounted on the outer parts of the four sets of bolts 13, and then the mounting plate 21 is fixed on the outer part of the cylinder 11 through the plurality of sets of nuts 15.

Claims

1. The utility model provides a flue gas waste heat recovery heat exchanger of steam power plant, its characterized in that includes barrel subassembly (1), the equidistant multiunit heat transfer subassembly (2) of installing of lateral wall of barrel subassembly (1), multiunit heat transfer subassembly (2) entrance point top is connected with inlet tube (3) jointly, multiunit heat transfer subassembly (2) exit end below is connected with outlet pipe (4) jointly;

the cylinder assembly (1) comprises a cylinder (11), a plurality of groups of through grooves (12) are formed in the side wall of the cylinder (11) at equal intervals, bolts (13) are connected to the side face of the cylinder (11) and at the corners corresponding to the through grooves (12), and nuts (15) are connected to the external threads of each group of bolts (13);

the heat exchange assembly (2) comprises a mounting plate (21), a tube array (22) is connected to the top and the bottom of the mounting plate (21) in a penetrating mode, a baffle plate (24) is connected to the side face of the mounting plate (21) and located on one side of the tube array (22), and bolt holes (25) are formed in the corners of each group of the mounting plate (21).

2. A heat exchanger for recovering flue gas waste heat of a thermal power plant according to claim 1, wherein sealing gaskets (14) are arranged outside the adjacent four groups of bolts (13) and outside the cylinder (11).

3. A heat exchanger for recovering flue gas waste heat in a thermal power plant according to claim 1, wherein the positions of each set of mounting plates (21) and each set of through grooves (12) are matched, each set of mounting plates (21) is positioned outside four adjacent sets of bolts (13), and the side surfaces of each set of mounting plates (21) are attached to the side surfaces of each set of sealing gaskets (14).

4. The heat exchanger for recovering flue gas waste heat of a thermal power plant according to claim 1, wherein the middle sections of the areas of each group of the tubes (22) are of an S-shaped structure and are positioned in the cylinder (11), and a plurality of groups of surrounding fin walls (23) are connected to the middle sections of the areas of each group of the tubes (22) at equal intervals.

5. A heat exchanger for recovering waste heat of flue gas from a thermal power plant according to claim 1, wherein the inlet and outlet ends of each group of the tubes (22) are L-shaped and are located above and below one side of the cylinder (11).

6. The heat exchanger for recovering flue gas waste heat of a thermal power plant according to claim 1, wherein a plurality of groups of baffle plates (24) are all positioned in the cylinder (11), and a plurality of groups of baffle plates (24) are in an S-shaped structure.