Waste heat utilization device of flue gas heat exchanger

Abstract

The utility model relates to the technical field of waste heat utilization equipment, and discloses a waste heat utilization device of a flue gas heat exchanger, which comprises a flue gas heat exchanger casing, a connecting groove communicated with the inside of the flue gas heat exchanger casing is arranged on the outer surface of the flue gas heat exchanger casing, and a plurality of heat conduction pipes are fixedly sleeved on the flue gas heat exchanger casing. The surface of the front side of the flue gas heat exchanger shell is fixedly connected with a flue gas inlet communicated with the interior of the flue gas heat exchanger shell, a cleaning mechanism is arranged on the flue gas heat exchanger shell, and according to the waste heat utilization device of the flue gas heat exchanger, the scraping frame moves up and down to scrape the inner wall of the flue gas heat exchanger shell up and down, so that dust in the flue gas heat exchanger shell is cleaned; dust after cleaning falls out through the connecting groove, cleaning is convenient and fast, manpower is saved, resource waste is avoided, the utilization efficiency of smoke waste heat is guaranteed, the heating efficiency of the heat conduction pipe is guaranteed, and then the practicability of the device is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization equipment technology, specifically a waste heat utilization device for a flue gas heat exchanger. Background Technology

[0002] In recent years, with the continuous and effective development and utilization of natural gas resources in my country, a large number of oil and gas field stations have been equipped with natural gas generator sets. The flue gas generated by these generator sets can reach temperatures as high as 500℃. It is estimated that of the energy generated by the natural gas consumed by these generator sets, only about 35% is converted into electricity, while about 30% is discharged with the exhaust gas.

[0003] Existing public patent: CN201420748217.6 A heat exchanger for a device that uses waste heat from flue gas to heat hot water. In this device, after the flue gas enters the flue box from the inlet, it flows along the flue formed by the flue box and the baffle plate under the action of the axial flow fan at the outlet, and is finally discharged from the outlet. The high-temperature flue gas conducts heat out of the flue box through the baffle plate, the box body and the heat conduction pipe in the flue, realizing the utilization of waste heat from flue gas and heat exchange.

[0004] However, because the flue gas contains soot and dust, a large amount of dust will accumulate on the inner wall of the heat exchanger after a period of use. The accumulation of dust to a certain thickness will affect the heat conversion, thereby affecting the heating efficiency of the heat pipe and the efficiency of the device, resulting in a waste of resources. Manual cleaning is laborious and difficult, which reduces the practicality of the device. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a waste heat utilization device for flue gas heat exchangers. It features a scraper frame that moves up and down to scrape the inner wall of the flue gas heat exchanger shell, thereby cleaning the dust inside the shell. The cleaned dust falls out through a connecting groove, making cleaning convenient and quick, saving manpower, avoiding resource waste, ensuring efficient utilization of flue gas waste heat, ensuring heating efficiency of the heat pipes, and thus ensuring the practicality of the device. This invention solves the problem that because flue gas contains soot and dust, a large amount of dust accumulates on the inner wall of the heat exchanger after a period of use. A certain thickness of dust accumulation affects heat conversion, thus affecting the heating efficiency of the heat pipes and consequently the efficiency of the device, leading to resource waste. Manual cleaning is laborious and difficult, reducing the practicality of the device.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a waste heat utilization device for a flue gas heat exchanger, comprising a flue gas heat exchanger shell, wherein a connecting groove communicating with the interior is provided on the outer surface of the flue gas heat exchanger shell;

[0009] Multiple heat-conducting tubes are fixedly sleeved on the shell of the flue gas heat exchanger;

[0010] The front surface of the flue gas heat exchanger shell is fixedly connected to a flue gas inlet that communicates with its interior.

[0011] The flue gas heat exchanger shell is equipped with a cleaning mechanism.

[0012] Preferably, the cleaning mechanism includes a smoke outlet, which is fixedly connected to the rear surface of the flue gas heat exchanger shell;

[0013] The flue gas outlet is connected to the inside of the flue gas heat exchanger shell;

[0014] A motor is fixedly connected to the upper surface of the flue gas heat exchanger shell.

[0015] Preferably, the rotation output shaft of the motor is fixedly connected to a threaded rod;

[0016] Among them, a fixing plate is threaded on the outer surface of the threaded rod;

[0017] The upper surface of the flue gas heat exchanger shell has two sliding grooves that extend out of its lower surface.

[0018] Preferably, a sliding rod is slidably connected within the sliding groove, and a sealing ring is provided between the sliding rod and the sliding groove;

[0019] The lower end of the sliding rod extends into the flue gas heat exchanger housing through a sliding groove, and the upper end of the sliding rod extends out of the upper surface of the flue gas heat exchanger housing through a sliding groove.

[0020] The upper ends of the two sliding rods are fixedly connected to the lower surface of the fixed plate.

[0021] Preferably, a sealing plate is provided on the casing of the flue gas heat exchanger, and a sealing block is fixedly connected to the sealing plate, with the sealing block slidably connected to the connecting groove.

[0022] The sealing plate is equipped with a sealing gasket;

[0023] The sealing plate is fitted with bolts that serve a fixing function, and the outer surface of the flue gas heat exchanger shell is provided with threaded holes. The sealing plate is fixedly connected to the flue gas heat exchanger shell by bolts.

[0024] Preferably, a scraper frame is slidably sleeved inside the flue gas heat exchanger housing;

[0025] The outer surface of the heat pipe is fitted with a fixing ring;

[0026] Among them, a second connecting rod is provided between the fixed rings and between the fixed ring and the scraper frame, and the second connecting rod is fixedly connected to the fixed ring and the scraper frame.

[0027] Preferably, a cleaning wire brush is fixedly sleeved inside the fixing ring, and the cleaning wire brush is in contact with the outer surface of the heat-conducting pipe;

[0028] Among them, two first connecting rods are fixedly connected between the fixed ring and the scraper frame, and the lower ends of the two sliding rods are fixedly connected to the two first connecting rods.

[0029] (III) Beneficial Effects

[0030] Compared with the prior art, the present invention provides a waste heat utilization device for a flue gas heat exchanger, which has the following beneficial effects:

[0031] 1. The waste heat utilization device for the flue gas heat exchanger uses a threaded rod that rotates synchronously to drive the fixed plate, sliding rod, first connecting rod, scraper frame, and cleaning wire brush to move up and down. The scraper frame moves up and down to scrape the inner wall of the flue gas heat exchanger shell, thereby cleaning the dust inside the shell. The cleaned dust falls out through the connecting groove, making cleaning convenient and quick, saving manpower, avoiding resource waste, ensuring the efficiency of flue gas waste heat utilization, ensuring the heating efficiency of the heat pipe, and thus ensuring the practicality of the device.

[0032] 2. The waste heat utilization device of this flue gas heat exchanger allows for the installation and disassembly of the sealing plate by tightening and loosening the bolts. The disassembly is convenient and quick, thereby increasing the practicality of the device.

[0033] 3. The waste heat utilization device of the flue gas heat exchanger achieves heat conduction when the high-temperature flue gas passes through the shell of the flue gas heat exchanger in the flue, thereby heating the liquid in the heat conduction tube, thus realizing the utilization and heat exchange of the waste heat of the flue gas, which is more energy-saving and more environmentally friendly, and thus increases the practicality of the device. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the overall structure of a waste heat utilization device for a flue gas heat exchanger according to the present invention.

[0035] Figure 2 This is a cross-sectional view of the flue gas heat exchanger of this utility model;

[0036] Figure 3 This is a schematic diagram of the scraper frame structure of this utility model.

[0037] In the diagram: 1. Flue gas heat exchanger shell; 2. Flue gas inlet; 3. Flue gas outlet; 4. Scraper frame; 5. First connecting rod; 6. Second connecting rod; 7. Fixing ring; 8. Cleaning wire brush; 9. Heat conduction pipe; 10. Sliding rod; 11. Fixing plate; 12. Connecting groove; 13. Sealing block; 14. Sealing plate; 15. Bolt; 16. Motor; 17. Threaded rod. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] Please see Figure 1-3 This utility model provides a new technical solution: a waste heat utilization device for a flue gas heat exchanger, including a flue gas heat exchanger shell 1, and a connecting groove 12 communicating with the interior of the flue gas heat exchanger shell 1 on its outer surface.

[0040] Multiple heat-conducting pipes 9 are fixedly sleeved on the shell 1 of the flue gas heat exchanger;

[0041] Among them, the front surface of the flue gas heat exchanger shell 1 is fixedly connected to the flue gas inlet 2, which communicates with its interior;

[0042] The flue gas heat exchanger shell 1 is equipped with a cleaning mechanism.

[0043] Furthermore, the cleaning mechanism includes a smoke outlet 3, which is fixedly connected to the rear surface of the flue gas heat exchanger shell 1;

[0044] Among them, the flue gas outlet 3 is connected to the interior of the flue gas heat exchanger shell 1;

[0045] The upper surface of the flue gas heat exchanger shell 1 is fixedly connected to a motor 16.

[0046] Furthermore, the rotation output shaft of the motor 16 is fixedly connected to a threaded rod 17;

[0047] Among them, the outer surface of the threaded rod 17 is threaded with a fixing plate 11;

[0048] The upper surface of the flue gas heat exchanger shell 1 has two sliding grooves that extend out of its lower surface.

[0049] Furthermore, a sliding rod 10 is slidably connected inside the sliding groove, and a sealing ring is provided between the sliding rod 10 and the sliding groove;

[0050] The lower end of the sliding rod 10 extends into the flue gas heat exchanger housing 1 through the sliding groove, and the upper end of the sliding rod 10 extends out of the upper surface of the flue gas heat exchanger housing 1 through the sliding groove.

[0051] The upper ends of the two sliding rods 10 are fixedly connected to the lower surface of the fixed plate 11.

[0052] Furthermore, a sealing plate 14 is provided on the flue gas heat exchanger shell 1, and a sealing block 13 is fixedly connected to the sealing plate 14. The sealing block 13 is slidably connected to the connecting groove 12.

[0053] A sealing gasket is provided on the sealing plate 14;

[0054] Among them, the sealing plate 14 is slidably fitted with bolts 15 for fixing, and the outer surface of the flue gas heat exchanger shell 1 is provided with threaded holes. The sealing plate 14 is fixedly connected to the flue gas heat exchanger shell 1 by bolts 15.

[0055] Furthermore, a scraper frame 4 is slidably fitted inside the flue gas heat exchanger shell 1;

[0056] Among them, a fixing ring 7 is sleeved on the outer surface of the heat pipe 9;

[0057] Among them, a second connecting rod 6 is provided between the fixed rings 7 and between the fixed rings 7 and the scraper frame 4, and the second connecting rod 6 is fixedly connected to the fixed rings 7 and the scraper frame 4.

[0058] Furthermore, a cleaning wire brush 8 is fixedly sleeved inside the fixing ring 7, and the cleaning wire brush 8 contacts the outer surface of the heat-conducting pipe 9;

[0059] Among them, two first connecting rods 5 are fixedly connected between the fixed ring 7 and the scraper frame 4, and the lower ends of the two sliding rods 10 are fixedly connected to the two first connecting rods 5.

[0060] Furthermore, an axial flow fan is installed inside the flue gas outlet 3. The axial flow fan, the flue gas heat exchanger shell 1, and the heat pipe 9 are all existing technologies in the heat exchanger of a device that uses waste heat from flue gas to heat hot water, as disclosed in the existing patent CN201420748217.6. They will not be described in detail here.

[0061] Furthermore, the flue gas enters the flue gas heat exchanger shell 1 through the flue gas inlet 2, and is then discharged through the flue gas outlet 3 under the action of the axial flow fan. The high-temperature flue gas achieves heat conduction when passing through the flue gas heat exchanger shell 1 in the flue, thereby heating the liquid in the heat conduction tube 9, thus realizing the utilization and heat exchange of the waste heat of the flue gas, which is more energy-saving and more environmentally friendly, and thus increases the practicality of the device.

[0062] Furthermore, during installation, the connecting groove 12 needs to face downwards. When it is necessary to clean the inside of the flue gas heat exchanger shell 1, the motor 16 needs to be started. The motor 16 drives the threaded rod 17 to rotate. The rotation of the threaded rod 17 synchronously drives the fixed plate 11, sliding rod 10, first connecting rod 5, scraper frame 4, and cleaning wire brush 8 to move up and down. The scraper frame 4 moves up and down to scrape the inner wall of the flue gas heat exchanger shell 1, thereby cleaning the dust inside the flue gas heat exchanger shell 1. The cleaned dust falls out through the connecting groove 12. The cleaning is convenient and quick, saves manpower, avoids resource waste, ensures the efficiency of flue gas waste heat utilization, ensures the heating efficiency of heat pipe 9, and thus ensures the practicality of the device.

[0063] Furthermore, by tightening and unscrewing the bolts 15, the sealing plate 14 can be installed and removed, making disassembly convenient and quick, thereby increasing the practicality of the device.

[0064] Working principle: When using this device, during installation, the connecting groove 12 needs to face downwards. When cleaning the inside of the flue gas heat exchanger shell 1, the motor 16 needs to be started. The motor 16 drives the threaded rod 17 to rotate. The rotation of the threaded rod 17 synchronously drives the fixed plate 11, sliding rod 10, first connecting rod 5, scraper frame 4, and cleaning wire brush 8 to move up and down. The up and down movement of the scraper frame 4 scrapes the inner wall of the flue gas heat exchanger shell 1, thereby cleaning the dust inside the flue gas heat exchanger shell 1. The cleaned dust falls out through the connecting groove 12. Cleaning is convenient and quick, saves manpower, avoids resource waste, ensures the efficiency of flue gas waste heat utilization, ensures the heating efficiency of heat pipe 9, and thus ensures the practicality of the device.

[0065] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat utilization device for a flue gas heat exchanger, comprising a flue gas heat exchanger shell (1), characterized in that: The outer surface of the flue gas heat exchanger shell (1) is provided with a connecting groove (12) that communicates with its interior; Among them, multiple heat-conducting tubes (9) are fixedly sleeved on the shell (1) of the flue gas heat exchanger; Among them, the front surface of the flue gas heat exchanger shell (1) is fixedly connected to the flue gas inlet (2) which communicates with its interior; The flue gas heat exchanger shell (1) is equipped with a cleaning mechanism.

2. The waste heat utilization device for a flue gas heat exchanger according to claim 1, characterized in that: The cleaning mechanism includes a smoke outlet (3), which is fixedly connected to the rear surface of the flue gas heat exchanger shell (1); Among them, the flue gas outlet (3) is connected to the inside of the flue gas heat exchanger shell (1); Among them, a motor (16) is fixedly connected to the upper surface of the flue gas heat exchanger shell (1).

3. The waste heat utilization device for a flue gas heat exchanger according to claim 2, characterized in that: The rotation output shaft of the motor (16) is fixedly connected to a threaded rod (17); Among them, the outer surface of the threaded rod (17) is threaded with a fixing plate (11); The upper surface of the flue gas heat exchanger shell (1) has two sliding grooves extending from its lower surface.

4. The waste heat utilization device for a flue gas heat exchanger according to claim 3, characterized in that: A sliding rod (10) is slidably connected inside the sliding groove, and a sealing ring is provided between the sliding rod (10) and the sliding groove; The lower end of the sliding rod (10) extends into the flue gas heat exchanger housing (1) through the sliding groove, and the upper end of the sliding rod (10) extends out of the upper surface of the flue gas heat exchanger housing (1) through the sliding groove. The upper ends of the two sliding rods (10) are fixedly connected to the lower surface of the fixed plate (11).

5. The waste heat utilization device for a flue gas heat exchanger according to claim 4, characterized in that: A sealing plate (14) is provided on the casing (1) of the flue gas heat exchanger, and a sealing block (13) is fixedly connected to the sealing plate (14). The sealing block (13) is slidably connected to the connecting groove (12). Among them, a sealing gasket is provided on the sealing plate (14); Among them, the sealing plate (14) is slidably fitted with bolts (15) for fixing, and the outer surface of the flue gas heat exchanger shell (1) is provided with threaded holes. The sealing plate (14) is fixedly connected to the flue gas heat exchanger shell (1) by bolts (15).

6. The waste heat utilization device for a flue gas heat exchanger according to claim 1, characterized in that: A scraper frame (4) is slidably sleeved inside the casing (1) of the flue gas heat exchanger; Among them, a fixing ring (7) is fitted on the outer surface of the heat pipe (9); Among them, a second connecting rod (6) is provided between the fixed rings (7) and between the fixed rings (7) and the scraper frame (4), and the second connecting rod (6) is fixedly connected to the fixed rings (7) and the scraper frame (4).

7. A waste heat recovery device for a flue gas heat exchanger according to claim 6, characterized in that: A cleaning wire brush (8) is fixedly sleeved inside the fixing ring (7), and the cleaning wire brush (8) is in contact with the outer surface of the heat-conducting pipe (9). Among them, two first connecting rods (5) are fixedly connected between the fixed ring (7) and the scraper frame (4), and the lower ends of the two sliding rods (10) are fixedly connected to the two first connecting rods (5).

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