Flue gas waste heat recovery device for combined heat and power generation

Abstract

The utility model relates to a flue gas waste heat recovery device for combined heat and power generation, and aims to solve the problems that the existing flue gas waste heat recovery device generally conducts flue gas waste heat to water to recover and reuse the heat, in order to increase the heat exchange efficiency, a heat exchange pipe is usually made into a multi-bending shape, and the heat exchange efficiency is poor. The technical problems that smoke dust is prone to being left in a multi-bent heat exchange pipe, smoke dust in the heat exchange pipe of an integrated structure is not prone to being cleaned, and the heat exchange efficiency is prone to being affected after a long time are solved in the prior art are solved, an adjusting mechanism is arranged outside the treatment box, and a heat exchange assembly is erected in the adjusting mechanism; heat exchange is carried out between high-heat flue gas and cold water in the treatment box through the copper snakelike bent pipe, flue gas waste heat recycling is achieved, the snakelike bent pipe is formed by combining the first snakelike bent half pipe and the second snakelike bent half pipe, the movable pipe is separated from the threaded arc-shaped plate by screwing the movable pipe, and the heat exchange efficiency is improved. And the snake-shaped bent half pipe I and the snake-shaped bent half pipe II can be separated, so that the cleaning is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas waste heat recovery for cogeneration of heat and power, in particular to a flue gas waste heat recovery device for cogeneration of heat and power. Background Art

[0002] The high-temperature flue gas discharged from the operating furnace used in the cogeneration project often takes away 20-50% of the heat supplied by the operating furnace. In order to improve thermal efficiency and reduce energy consumption, recovering the flue gas waste heat through the flue gas waste heat recovery device is an important energy-saving way.

[0003] Existing flue gas waste heat recovery devices generally transfer the flue gas waste heat to water to recover and reuse the heat. In order to increase the heat exchange efficiency, the heat exchange tubes are often made into a multi-bend shape. However, smoke and dust are easily retained inside the multi-bend heat exchange tubes, and the smoke and dust inside the heat exchange tubes with an integrated structure are difficult to clean, which can easily affect the heat exchange efficiency over time. In view of this, we propose a flue gas waste heat recovery device for cogeneration of heat and power. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology, meet the actual needs, and provide a flue gas waste heat recovery device for cogeneration of heat and power, so as to solve the technical problem that the current existing flue gas waste heat recovery device generally transfers the flue gas waste heat to water to recover and reuse the heat. In order to increase the heat exchange efficiency, the heat exchange tube is often made into a multi-bend shape. However, the multi-bend heat exchange tube is prone to smoke and dust residue inside, and the smoke and dust inside the heat exchange tube with an integrated structure is difficult to clean, which can easily affect the heat exchange efficiency over a long period of time.

[0005] In order to achieve the purpose of the utility model, the technical solution adopted by the utility model is as follows: a flue gas waste heat recovery device for cogeneration of heat and power is designed, including a processing box, a regulating mechanism is provided on the outside of the processing box, a heat exchange component is mounted inside the regulating mechanism, the left end of the heat exchange component is connected to a flue gas outlet pipe, and the lower end of the flue gas outlet pipe is connected to a cogeneration boiler;

[0006] The heat exchange assembly includes an air intake pipe, an exhaust pipe is symmetrically arranged on the right side of the air intake pipe, a limiting ring frame is fixed to the outside of the air intake pipe and the exhaust pipe, and a movable pipe is clamped at the bottom end of the air intake pipe and the exhaust pipe, a serpentine bent half-tube 1 is attached to the front side of the bottom of the movable tube, and a serpentine bent half-tube 2 is attached to the rear side of the bottom of the movable tube, threaded arc plates are provided on both sides of the top of the serpentine bent half-tube 1 and the serpentine bent half-tube 2, and a plurality of guide rods are fixed on the surface of the serpentine bent half-tube 2.

[0007] Preferably, the serpentine-bent half-tube 1 and the serpentine-bent half-tube 2 are symmetrical to each other, and the serpentine-bent half-tube 1 and the serpentine-bent half-tube 2 are both made of metallic copper.

[0008] Preferably, the threaded arc plates fitted on the same side of the top of the serpentine bending half-tube 1 and the serpentine bending half-tube 2 are threadedly connected, and the movable tube is threadedly connected to a group of fitted threaded arc plates.

[0009] Preferably, a guide groove matching the guide rod is provided on the inner side of the serpentine-bent half-tube 1, and the serpentine-bent half-tube 2 forms a snap-fit structure with the serpentine-bent half-tube 1 through the guide rod.

[0010] Preferably, the adjustment mechanism includes a fixed slot frame, and two groups of the fixed slot frames are embedded with multi-stage hydraulic cylinders. The movable ends of the multi-stage hydraulic cylinders are connected to protrusions, and a sealing cover plate is provided on one side of the protrusion.

[0011] Preferably, the protrusion and the sealing cover plate are integrally formed, and the sealing cover plate forms a lifting structure through the protrusion, a multi-stage hydraulic cylinder and a fixed groove frame.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The utility model introduces the flue gas generated by the cogeneration boiler into the serpentine bent tube through the flue gas outlet pipe and the air inlet pipe. The copper serpentine bent tube effectively exchanges heat between the high-temperature flue gas and the cold water inside the treatment box, thereby heating the cold water inside the treatment box and realizing the recovery and utilization of the waste heat of the flue gas. The cooled flue gas is discharged through the exhaust pipe. Since the serpentine bent tube is composed of a serpentine bent half-tube one and a serpentine bent half-tube two, when cleaning is required later, the heat exchange component is moved up until it is moved out of the treatment box, and the movable tube is screwed to separate it from the threaded arc plate, so that the serpentine bent half-tube one and the serpentine bent half-tube two can be separated, which is convenient for cleaning.

[0014] 2. The utility model uses a multi-stage hydraulic cylinder to effectively drive the protrusion and the sealing cover to move up and down, thereby realizing the opening and closing of the top of the processing box. When the sealing cover moves up, it can drive the heat exchange component mounted on its inner side to move up, thereby facilitating the partial disassembly of the heat exchange component. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the adjustment state structure of the adjustment mechanism of the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the heat exchange component of the present utility model;

[0018] Figure 4 This is a schematic diagram of the disassembled structure of the heat exchange component of the present utility model;

[0019] Figure 5For the utility model Figure 4 A schematic diagram of the partially enlarged structure at center A;

[0020] In the figure: 1. Processing box; 2. Adjustment mechanism; 3. Heat exchange component; 4. Flue gas outlet pipe; 5. Cogeneration boiler;

[0021] 201, fixed trough frame; 202, multi-stage hydraulic cylinder; 203, bump; 204, sealing cover plate;

[0022] 301. Intake pipe; 302. Exhaust pipe; 303. Limiting ring frame; 304. Movable pipe; 305. Serpentine-bend half-pipe 1; 306. Serpentine-bend half-pipe 2; 307. Threaded arc plate; 308. Guide rod. DETAILED DESCRIPTION

[0023] The present invention is further described below with reference to the accompanying drawings and embodiments:

[0024] A flue gas waste heat recovery device for cogeneration of heat and power, see Figures 1 to 5 , comprising a processing box 1, an adjusting mechanism 2 is provided on the outside of the processing box 1, a heat exchange component 3 is mounted inside the adjusting mechanism 2, a flue gas outlet pipe 4 is connected to the left end of the heat exchange component 3, and a cogeneration boiler 5 is connected to the lower end of the flue gas outlet pipe 4;

[0025] The heat exchange component 3 includes an air inlet pipe 301, an exhaust pipe 302 is symmetrically arranged on the right side of the air inlet pipe 301, and a limiting ring frame 303 is fixed on the outside of the air inlet pipe 301 and the exhaust pipe 302. The bottom ends of the air inlet pipe 301 and the exhaust pipe 302 are both clamped with a movable pipe 304, and the front side of the bottom of the movable pipe 304 is attached to the serpentine bent half-tube 1 305, and the rear side of the bottom of the movable pipe 304 is attached to the serpentine bent half-tube 2 306. Among them, the serpentine bent half-tube 1 305 and the serpentine bent half-tube 2 306 are symmetrical to each other, and the material of the serpentine bent half-tube 1 305 and the serpentine bent half-tube 2 306 are both metal copper. Threaded arc plates 307 are provided on both sides of the top of 305 and the serpentine bending half-tube 306. Furthermore, the threaded arc plates 307 that are in contact with each other on the same side of the top of the serpentine bending half-tube 1 305 and the serpentine bending half-tube 2 306 are threadedly connected, and the movable tube 304 is threadedly connected to a group of threaded arc plates 307 that are in contact with each other. A plurality of guide rods 308 are fixed on the surface of the serpentine bending half-tube 306. Furthermore, a guide groove that matches the guide rod 308 is provided on the inner side of the serpentine bending half-tube 1 305, and the serpentine bending half-tube 2 306 forms a locking structure with the serpentine bending half-tube 1 305 through the guide rod 308. The utility model introduces the flue gas generated by the cogeneration boiler 5 into the serpentine bent tube through the flue gas outlet pipe 4 and the air inlet pipe 301. The copper serpentine bent tube effectively exchanges heat between the high-temperature flue gas and the cold water inside the treatment box 1, thereby heating the cold water inside the treatment box 1 and realizing the recovery and utilization of the waste heat of the flue gas. The cooled flue gas is discharged through the exhaust pipe 302. Since the serpentine bent tube is composed of a serpentine bent half-tube 1 305 and a serpentine bent half-tube 2 306, when cleaning is required later, the heat exchange component 3 is moved up until it is moved out of the treatment box 1, and the movable tube 304 is screwed to separate it from the threaded arc plate 307, so that the serpentine bent half-tube 1 305 and the serpentine bent half-tube 2 306 can be separated for easy cleaning.

[0026] It is worth noting that the adjustment mechanism 2 includes a fixed slot frame 201, and two sets of fixed slot frames 201 are embedded with multi-stage hydraulic cylinders 202. The movable end of the multi-stage hydraulic cylinder 202 is connected to a protrusion 203, and a sealing cover plate 204 is provided on one side of the protrusion 203. The protrusion 203 and the sealing cover plate 204 are integrally formed. The sealing cover plate 204 forms a lifting structure through the protrusion 203, the multi-stage hydraulic cylinder 202, and the fixed slot frame 201. The utility model effectively drives the protrusion 203 and the sealing cover plate 204 up and down through the multi-stage hydraulic cylinder 202, thereby achieving the opening and closing of the top of the processing box 1. When the sealing cover plate 204 moves upward, it can also drive the heat exchange assembly 3 mounted therein to move upward, thereby facilitating the partial disassembly of the heat exchange assembly 3.

[0027] Working principle: The flue gas generated by the cogeneration boiler 5 is introduced into the serpentine bending pipe through the flue gas outlet pipe 4 and the air inlet pipe 301. The copper serpentine bending pipe exchanges heat between the high-temperature flue gas and the cold water inside the treatment box 1, thereby heating the cold water inside the treatment box 1 and realizing the recovery and utilization of the flue gas waste heat. The cooled flue gas is discharged through the exhaust pipe 302. When the serpentine bending pipe needs to be cleaned later, the flue gas outlet pipe 4 is first separated from the air inlet pipe 301, and then the flue gas is discharged through the exhaust pipe 302. The stage hydraulic cylinder 202 drives the protrusion 203 and the sealing cover plate 204 to move upward, thereby driving the heat exchange component 3 mounted on the inner side of the sealing cover plate 204 to move upward. Since the limiting ring frame 303 and the sealing cover plate 204 are fixedly connected, the intake pipe 301 and the exhaust pipe 302 can remain stationary. Then, the movable pipe 304 is screwed to separate it from the threaded arc plate 307, so that the serpentine half-pipe 1 305 can be separated from the serpentine half-pipe 2 306 for easy cleaning.

[0028] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A flue gas waste heat recovery device for cogeneration of heat and power, comprising a processing box (1), characterized in that: The treatment box (1) is provided with an adjustment mechanism (2) on the outside, a heat exchange component (3) is provided inside the adjustment mechanism (2), a flue gas outlet pipe (4) is connected to the left end of the heat exchange component (3), and a cogeneration boiler (5) is connected to the lower end of the flue gas outlet pipe (4); The heat exchange component (3) includes an air inlet pipe (301), an exhaust pipe (302) is symmetrically arranged on the right side of the air inlet pipe (301), and a limiting ring frame (303) is fixed on the outside of the air inlet pipe (301) and the exhaust pipe (302). The bottom ends of the air inlet pipe (301) and the exhaust pipe (302) are both clamped with a movable pipe (304), the front side of the bottom of the movable pipe (304) is attached with a serpentine bent half-pipe 1 (305), and the rear side of the bottom of the movable pipe (304) is attached with a serpentine bent half-pipe 2 (306). Threaded arc plates (307) are provided on both sides of the top of the serpentine bent half-pipe 1 (305) and the serpentine bent half-pipe 2 (306), and a plurality of guide rods (308) are fixed on the surface of the serpentine bent half-pipe 2 (306).

2. The flue gas waste heat recovery device for cogeneration of heat and power according to claim 1, characterized in that: The serpentine bending half-tube one (305) and the serpentine bending half-tube two (306) are symmetrical to each other, and the materials of the serpentine bending half-tube one (305) and the serpentine bending half-tube two (306) are both metal copper.

3. The flue gas waste heat recovery device for cogeneration of heat and power according to claim 1, characterized in that: The threaded arc plates (307) that fit on the same side of the top of the serpentine bending half-tube 1 (305) and the serpentine bending half-tube 2 (306) are threadedly connected, and the movable tube (304) is threadedly connected to the set of threaded arc plates (307) that fit.

4. The flue gas waste heat recovery device for cogeneration of heat and power according to claim 1, characterized in that: The inner side of the serpentine bending half-tube (305) is provided with a guide groove matching the guide rod (308), and the serpentine bending half-tube (306) forms a locking structure with the serpentine bending half-tube (305) through the guide rod (308).

5. The flue gas waste heat recovery device for cogeneration of heat and power according to claim 1, characterized in that: The adjustment mechanism (2) comprises a fixed slot frame (201), wherein two groups of the fixed slot frames (201) are embedded with a multi-stage hydraulic cylinder (202), the movable end of the multi-stage hydraulic cylinder (202) is connected to a protrusion (203), and a sealing cover plate (204) is provided on one side of the protrusion (203).

6. The flue gas waste heat recovery device for cogeneration of heat and power according to claim 5, characterized in that: The protrusion (203) and the sealing cover plate (204) are integrally formed, and the sealing cover plate (204) forms a lifting structure through the protrusion (203), the multi-stage hydraulic cylinder (202) and the fixed slot frame (201).

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