Heat exchange equipment for pre-dedusting of high-temperature flue gas

Abstract

The utility model discloses heat exchange equipment for pre-dedusting of high-temperature flue gas, which comprises an equipment main body, the equipment main body consists of an ash hopper, a barrel and a seal head, the seal head is arranged at the top of the barrel, the ash hopper is arranged at the bottom of the barrel, the seal head consists of a high-temperature flue gas inlet, an automatic air supplement port, a manual air supplement port and an access hole, and the automatic air supplement port is arranged at the bottom of the barrel. The high-temperature flue gas inlet is formed in the top of the end socket, and the automatic air supplementing opening and the manual air supplementing opening are formed in the two sides of the end socket respectively. The flue gas heat exchange effect is strictly guaranteed, the automatic and manual air supplementing openings are formed in the upper sealing head, cold air premixing is automatically carried out, and the temperature of a flue gas outlet is accurately controlled; meanwhile, waste heat of cold air after heat exchange can be utilized for a combustion-supporting air system and the like, and energy can be greatly saved and consumption can be greatly reduced; meanwhile, the bottom ash hopper is provided with a material level sensing and anti-blocking vibration facility, so that dust in the flue gas can be efficiently recycled, the flue gas is subjected to anti-sticking pretreatment, the treatment load of a subsequent dust remover is reduced, and the flue gas purification efficiency is integrally improved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection dust removal, in particular to a heat exchange device for pre-dusting high-temperature flue gas. Background Technique

[0002] In recent years, with the increasingly wide application of sintered plate dust collectors in the field of dust collection and purification, sintered plate dust collectors have been used in various industries to replace cartridge and bag dust collectors. Especially for the flue gas of furnace smelting, the temperature is very high, and the flue gas has characteristics such as high humidity and strong corrosiveness. The normal-temperature sintered plate dust collector is no longer applicable and can no longer maintain the normal production operation of the system.

[0003] At present, sintered plate dust collectors can be divided into 70°C, 110°C, 160°C and 450°C etc. according to the temperature adaptation conditions. The 450°C dust removal filter element is made of inorganic ceramic material, with a large investment and is used more under special working conditions. For general flue gas, through a cooling heat exchange device, the flue gas temperature is reduced to the matching temperature range, and the sintered plate dust collector can meet the use conditions. Therefore, it is necessary to develop a heat exchange device for high-temperature flue gas to improve the equipment performance and ensure the dust removal efficiency of the system. Content of the Utility Model

[0004] The purpose of the utility model is to provide a heat exchange device for pre-dusting high-temperature flue gas to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A heat exchange device for pre-dusting high-temperature flue gas, including a device main body, the device main body is composed of a hopper, a cylinder body and a head, the head is installed on the top of the cylinder body, the hopper is installed at the bottom of the cylinder body, the head is composed of a high-temperature flue gas inlet, an automatic air supply port, a manual air supply port and a maintenance port, the high-temperature flue gas inlet is arranged at the top of the head, the automatic air supply port and the manual air supply port are respectively arranged on both sides of the head, the maintenance port is arranged on the front of the head, the cylinder body is composed of a shell-side outer shell and internal heat exchange tubes, the shell-side outer shell is provided with a cold air inlet, a cold air outlet and a blowdown port, and the hopper is composed of a flue gas outlet and a dust discharge port.

[0006] Preferably, the automatic air supply port and the manual air supply port are respectively provided with an automatic air supply valve and a manual air supply valve.

[0007] Preferably, a baffle is arranged inside the cylinder body.

[0008] Preferably, the flue gas outlet is arranged at the tangential position on one side of the hopper, and the dust discharge port is arranged at the bottom of the hopper.

[0009] Preferably, the inclination angle of the hopper is 55 - 65°C, and the inside of the hopper can be sprayed with Teflon. A level sensor and an anti-blocking vibrator are installed on the conical section of the hopper.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] The heat exchange effect of the flue gas is strictly guaranteed. An automatic and manual air supply opening is provided at the upper head, and cold air is pre-mixed automatically to accurately control the temperature of the flue gas outlet. At the same time, the heat-exchanged cold air can be used for waste heat utilization in the combustion-supporting air system, etc., which can greatly save energy and reduce consumption. At the same time, the bottom ash hopper is equipped with a level sensor and an anti-blocking vibration device, which can efficiently recover the dust in the flue gas, perform anti-sticking pretreatment on the flue gas, reduce the treatment load of the subsequent dust collector, and overall improve the flue gas purification efficiency. Description of the Drawings

[0012] Figure 1 It is a front view structural schematic diagram of the present utility model;

[0013] Figure 2 It is a top view structural schematic diagram of the present utility model.

[0014] In the figure: 1. Ash hopper; 2. Flue gas outlet; 3. Cold air inlet; 4. Baffle; 5. Positioning pipe; 6. Heat exchange pipe; 7. Shell; 8. Automatic air supply opening; 9. Maintenance opening; 10. Flue gas inlet; 11. Head; 12. Manual air supply opening; 13. Cold air outlet; 14. Drainage port; 15. Ash discharge port. }Detailed Embodiments

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figure 1-2The utility model provides a technical solution: a heat exchange device for high-temperature flue gas pre-dust removal, including a device body, the device body is composed of an ash hopper 1, a cylinder 7 and a head 11, the head 11 is installed at the top of the cylinder 7, the ash hopper 1 is installed at the bottom of the cylinder 7, the head 11 is composed of a high-temperature flue gas air inlet 10, an automatic air supply port 8, a manual air supply port 12 and an inspection port 9, the high-temperature flue gas air inlet 10 is arranged at the top of the head 11, the automatic air supply port 8 and the manual air supply port 12 are respectively arranged on both sides of the head 11, the inspection port 9 is arranged on the front of the head 11, the cylinder 7 is composed of a shell-side outer shell and an internal heat exchange tube 6 The shell side shell is provided with a cold air inlet 3, a cold air outlet 13 and a sewage outlet 14. The ash hopper 1 is composed of a flue gas outlet 2 and an ash discharge port 15. The high-temperature flue gas flows through the cylinder tube side from the air inlet on the top of the head and is led out from the air outlet on the side of the bottom ash hopper. The cold air countercurrently enters from the lower air inlet of the cylinder shell side and is fully heat-exchanged with the flue gas before being led out from the upper air outlet, fully ensuring the heat exchange effect of the hot flue gas; the high-temperature or corrosive flue gas is fully heat-exchanged with the external cold air from the upper head inlet through the heat exchange tube 6. A deflection baffle 4 is provided inside the cylinder 7, which can effectively stabilize the heat exchange tube 6 and also effectively improve the heat exchange efficiency of the hot and cold air.

[0017] In the present invention, the automatic air supply port 8 and the manual air supply port 12 are respectively provided with an automatic air supply valve and a manual air supply valve. If the flue gas temperature is too high, the air supply valve can be opened manually and automatically to premix the flue gas with cold air, and intelligent control can be used to reduce the source flue gas temperature.

[0018] In the present invention, a deflection baffle 4 is provided inside the cylinder 7 .

[0019] In the present invention, the smoke outlet 2 is arranged at a tangent position on one side of the ash hopper 1, which can increase the anti-sticking dust removal effect and improve the dust removal efficiency. The ash discharge port 15 is arranged at the bottom of the ash hopper 1.

[0020] In the utility model, the inclination angle of the ash hopper 1 is 55-65 degrees, and the interior of the ash hopper 1 can be sprayed with Teflon to improve the corrosion resistance and wear resistance of the equipment. The cone section of the ash hopper 1 is equipped with a material level sensor and an anti-blocking vibrator to ensure that the wall of the device does not stick to dust and efficiently collect dust.

[0021] The working principle of the utility model is as follows: high-temperature flue gas flows through the cylinder tube from the air inlet on the top of the head and is led out from the air outlet on the side of the bottom ash hopper. Cold air countercurrently enters from the lower air inlet on the shell side of the cylinder, and after sufficient heat exchange with the flue gas, it is led out from the upper air outlet, fully ensuring the heat exchange effect of the hot flue gas; high-temperature or corrosive flue gas is fully heat-exchanged with the external cold air through the inside of the heat exchange tube 6 from the upper head inlet, and a deflection baffle 4 is provided inside the cylinder 7, which can effectively stabilize the heat exchange tube 6 and also effectively improve the heat exchange efficiency of hot and cold air; the hot air passing through the cold air outlet 13 can be used for waste heat utilization, pre-combustion air system or workshop efficiency utilization, thereby comprehensively reducing energy consumption.

[0022] The content not detailedly described in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A heat exchange device for pre-dusting high-temperature flue gas, characterized in that: It includes a device main body which is composed of a hopper (1), a cylinder body (7) and a head (11). The head (11) is installed at the top of the cylinder body (7), and the hopper (1) is installed at the bottom of the cylinder body (7). The head (11) is composed of a high-temperature flue gas inlet (10), an automatic air supply port (8), a manual air supply port (12) and a maintenance port (9). The high-temperature flue gas inlet (10) is arranged at the top of the head (11), the automatic air supply port (8) and the manual air supply port (12) are respectively arranged on both sides of the head (11), and the maintenance port (9) is arranged on the front of the head (11). The cylinder body (7) is composed of a shell-side outer shell and internal heat exchange tubes (6). A cold air inlet (3), a cold air outlet (13) and a sewage outlet (14) are opened on the shell-side outer shell. The hopper (1) is composed of a flue gas outlet (2) and an ash discharge port (15).

2. The heat exchange device for pre-dust removal of high-temperature flue gas according to claim 1, wherein: An automatic air supply valve and a manual air supply valve are respectively arranged at the automatic air supply port (8) and the manual air supply port (12).

3. The heat exchange device for pre-dust removal of high-temperature flue gas according to claim 1, characterized in that: A baffle plate (4) is arranged inside the cylinder body (7).

4. The heat exchange device for pre-dusting high-temperature flue gas according to claim 1, characterized in that: The flue gas outlet (2) is arranged at the tangential position on one side of the hopper (1), and the ash discharge port (15) is arranged at the bottom of the hopper (1).

5. The heat exchange device for pre-dusting high-temperature flue gas according to claim 1, wherein: The inclination angle of the hopper (1) is 55 - 65 °C, and the inside of the hopper (1) can be sprayed with Teflon. A level sensor and an anti-blocking vibrator are installed in the conical section of the hopper (1).

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