Waste heat recovery device of novel energy-saving and environment-friendly calcium carbide furnace

Abstract

The utility model relates to the technical field of calcium carbide furnace waste heat recovery, in particular to a novel energy-saving environment-friendly calcium carbide furnace waste heat recovery device which comprises a calcium carbide furnace body, a first smoke pipe is fixedly connected to the surface of the calcium carbide furnace body, a second smoke pipe is installed at one end of the first smoke pipe, and an induced draft fan is arranged at one end of the surface of a third smoke pipe. A waste heat boiler is arranged at one end of the induced draft fan, a filter screen is fixedly connected to the surface of the fixing plate, a rotating shaft is rotationally connected to the surface of the filter screen, and a plurality of scrapers are installed on the surface of the rotating shaft; the device has the beneficial effects that the filter screen is installed on the surface of the smoke pipe, carbon deposition in high-temperature smoke can be intercepted and filtered, the energy utilization efficiency is improved, turbine blades and scrapers are arranged on the surface of the filter screen, the scrapers can clean the carbon deposition on the surface of the filter screen, and the smoothness of the filter screen is kept; the scraper can automatically adjust the distance and pressure between the scraper and the surface of the filter screen according to the thickness of the deposited carbon, and efficient cleaning of the deposited carbon with different thicknesses is achieved.

Description

Technical Field

[0001] This utility model relates to the field of waste heat recovery technology of calcium carbide furnaces, specifically a new type of energy-saving and environmentally friendly waste heat recovery device for calcium carbide furnaces. Background Technology

[0002] The high energy consumption and high pollution problems of traditional calcium carbide furnaces are becoming increasingly prominent. During the calcium carbide production process, the flue gas in the furnace usually carries a large amount of heat. If it is not recovered and utilized, it will not only cause energy waste, but also increase the burden of environmental governance.

[0003] In existing technologies, waste heat recovery from calcium carbide furnaces mainly adopts flue-type waste heat boilers. The high-temperature flue gas generated by the calcium carbide furnace is discharged through the top flue and enters the waste heat boiler equipment through an induced draft fan to generate high-pressure steam. The cooled flue gas enters the convective heat exchanger to preheat the calcium carbide raw materials. The low-temperature flue gas after waste heat recovery enters the bag filter to remove fine dust before being discharged, thereby maximizing the utilization of the energy of the calcium carbide furnace flue gas.

[0004] However, the flue gas from the calcium carbide furnace contains unburned carbon particles, tar, and dust. When these impurities enter the waste heat boiler equipment directly with the flue gas, they will cause carbon buildup on the surface of heat exchange tube bundles, pipes, and other components inside the equipment, significantly reducing heat exchange efficiency and waste heat recovery effect, resulting in energy waste. Utility Model Content

[0005] The purpose of this utility model is to provide a new type of energy-saving and environmentally friendly waste heat recovery device for calcium carbide furnaces, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a novel energy-saving and environmentally friendly waste heat recovery device for a calcium carbide furnace, comprising a calcium carbide furnace body, a first flue pipe fixedly connected to the surface of the calcium carbide furnace body, a second flue pipe installed at one end of the first flue pipe, a third flue pipe installed at one end of the second flue pipe, an induced draft fan installed at one end of the surface of the third flue pipe, a waste heat boiler installed at one end of the induced draft fan, a fixing plate snapped onto the surface of the second flue pipe, a filter screen fixedly connected to the surface of the fixing plate, a rotating shaft rotatably connected to the surface of the filter screen, and multiple scrapers installed on the surface of the rotating shaft.

[0007] Preferably, an annular groove is formed on the surface of the calcium carbide furnace body, and a first magnetic sheet is fixedly connected to the surface of the annular groove. The first magnetic sheet has an annular structure, and a fixing plate is snapped onto the surface of the annular groove. The fixing plate has an annular plate structure with an "L" cross-section.

[0008] Preferably, a sealing gasket is fixedly connected to the surface of the fixing plate. The sealing gasket has an annular structure and is sandwiched between the annular groove and the fixing plate. A second magnetic sheet is fixedly connected to one side of the surface of the fixing plate, and the first magnetic sheet and the second magnetic sheet attract and adhere to each other.

[0009] Preferably, a limiting plate is fixedly connected to the center of the filter screen surface. The limiting plate is a circular plate structure with a "T"-shaped cross section. A rotating shaft is rotatably connected to the surface of the limiting plate, and a turbine blade is installed on the surface of the end of the rotating shaft away from the filter screen.

[0010] Preferably, the surface of the rotating shaft is provided with multiple sliding grooves arranged in a circumferential array. The sliding grooves are T-shaped grooves. A guide rod is fixedly connected to the surface of the sliding groove. The guide rod has a cylindrical structure and a spring passes through its surface.

[0011] Preferably, one end of the spring is fixedly connected to the top surface of the sliding groove, and the other end of the spring is fixedly connected to a sliding plate. The sliding plate has a "T"-shaped plate structure and is slidably connected to the surface of the guide rod. The scraper is fixedly connected to the surface of the sliding plate.

[0012] Preferably, the first, second, and third smoke pipes are each provided with a flange at one end close to each other, and the flanges are connected by bolts.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The novel energy-saving and environmentally friendly waste heat recovery device for a calcium carbide furnace proposed in this utility model has a fixed plate on the surface of the flue and a filter screen installed on the surface of the fixed plate. This can intercept and filter the carbon deposits in the high-temperature flue gas, making the flue gas entering the waste heat recovery device purer, thereby improving energy utilization efficiency.

[0015] The filter screen is equipped with turbine blades and a scraper, which allows the scraper to clean the carbon deposits on the filter screen surface and maintain the filter screen's unobstructed flow. Through an automatic adjustment structure consisting of a sliding groove, guide rod, spring, and sliding plate, the scraper can automatically adjust the distance and pressure between itself and the filter screen surface according to the thickness of the carbon deposits, achieving efficient cleaning of carbon deposits of different thicknesses and improving the adaptability of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a half-sectional schematic diagram of the structure of this utility model;

[0018] Figure 3 for Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0019] Figure 4 for Figure 2 Enlarged schematic diagram of the structure at point B;

[0020] Figure 5 This is a schematic diagram of the filter screen structure of this utility model;

[0021] Figure 6 This is a schematic diagram of the scraper structure of this utility model.

[0022] In the diagram: 1. Calcium carbide furnace body; 2. First smoke pipe; 3. Second smoke pipe; 4. Third smoke pipe; 5. Induced draft fan; 6. Waste heat boiler; 7. Fixing plate; 8. Filter screen; 9. Sealing gasket; 10. First magnetic plate; 11. Second magnetic plate; 12. Turbine blade; 13. Rotating shaft; 14. Scraper; 15. Guide rod; 16. Spring; 17. Sliding plate; 18. Limiting plate; 19. Sliding groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1

[0024] Please see Figures 1 to 2 This utility model provides a technical solution: a novel energy-saving and environmentally friendly waste heat recovery device for a calcium carbide furnace, comprising a calcium carbide furnace body 1, a first flue 2 fixedly connected to the surface of the calcium carbide furnace body 1, a second flue 3 installed at one end of the first flue 2, a third flue 4 installed at one end of the second flue 3, an induced draft fan 5 provided at one end of the surface of the third flue 4, a waste heat boiler 6 provided at one end of the induced draft fan 5, a fixing plate 7 snapped onto the surface of the second flue 3, a filter screen 8 fixedly connected to the surface of the fixing plate 7, a rotating shaft 13 rotatably connected to the surface of the filter screen 8, and multiple scrapers 14 installed on the surface of the rotating shaft 13, with the blades of the scrapers 14 forming a 45° angle with the surface of the filter screen 8;

[0025] A filter screen 8 is installed on the surface of the fixed plate 7, which can intercept and filter carbon deposits in high-temperature flue gas, thereby improving energy utilization efficiency. The surface of the filter screen 8 is equipped with turbine blades 12 and scrapers 14, which enable the scrapers 14 to clean the carbon deposits on the surface of the filter screen 8 and keep the filter screen 8 unobstructed. Through the automatic adjustment structure composed of sliding groove 19, guide rod 15, spring 16 and sliding plate 17, the scrapers 14 can automatically adjust the distance and pressure between themselves and the surface of the filter screen 8 according to the thickness of the carbon deposits, thereby achieving efficient cleaning of carbon deposits of different thicknesses and improving the adaptability of the device. Example 2

[0026] Please see Figures 1 to 4Based on Embodiment 1, in order to install the filter screen 8, flanges are provided at the ends of the first smoke pipe 2, the second smoke pipe 3 and the third smoke pipe 4 that are close to each other. The flanges are connected by bolts. By providing flanges, it is convenient to disassemble the second smoke pipe 3, thereby facilitating the installation of the filter screen 8.

[0027] The surface of the calcium carbide furnace body 1 is provided with an annular groove, and a first magnetic sheet 10 is fixedly connected to the surface of the annular groove. The first magnetic sheet 10 has an annular structure. A fixing plate 7 is snapped onto the surface of the annular groove. The fixing plate 7 is clamped between the first smoke pipe 2 and the annular groove, and the fixing plate 7 is subject to secondary positioning. The fixing plate 7 has an annular plate structure with a cross-section of "L". A sealing gasket 9 is fixedly connected to the surface of the fixing plate 7. The sealing gasket 9 is made of corrosion-resistant fluorinated rubber material. The sealing gasket 9 has an annular structure and is clamped between the annular groove and the fixing plate 7. The sealing gasket 9 can improve the sealing effect between the fixing plate 7 and the second smoke pipe 3.

[0028] A second magnetic sheet 11 is fixedly connected to one side of the surface of the fixing plate 7. The first magnetic sheet 10 and the second magnetic sheet 11 attract and adhere to each other, providing additional fastening force for the fixing plate 7, making the installation of the fixing plate 7 in the annular groove more secure. The surfaces of the two magnetic sheets are provided with a high-temperature resistant silicone layer. Example 3

[0029] Please see Figures 1 to 6 Based on Embodiment 2, in order to improve the filtration performance of the filter screen 8, a limiting plate 18 is fixedly connected to the center of the surface of the filter screen 8. The filter screen 8 is a metal mesh, and the limiting plate 18 is a circular plate structure with a "T" shaped cross section. The limiting plate 18 provides a basis for the rotation of the rotating shaft 13, and the rotating shaft 13 is rotatably connected to the surface of the limiting plate 18.

[0030] Turbine blades 12 are installed on the surface of the rotating shaft 13 away from the filter screen 8. By the direction of flue gas flow and the action of the induced draft fan 5, the turbine blades 12 have strong kinetic energy to rotate, thereby driving the rotating shaft 13 and the scraper 14 to rotate.

[0031] The surface of the rotating shaft 13 is provided with multiple sliding grooves 19 arranged in a circular array. The sliding grooves 19 are T-shaped grooves and provide sliding space for the sliding plate 17. A guide rod 15 is fixedly connected to the surface of the sliding groove 19. The guide rod 15 is cylindrical and a spring 16 passes through the surface of the guide rod 15. One end of the spring 16 is fixedly connected to the top surface of the sliding groove 19, and the other end of the spring 16 is fixedly connected to the sliding plate 17. The sliding plate 17 is T-shaped and slidably connected to the surface of the guide rod 15. The scraper 14 is fixedly connected to the surface of the sliding plate 17. When the carbon deposit thickness changes, the scraper 14 slides in the sliding groove 19 through the sliding plate 17 and automatically adjusts the distance and pressure with the surface of the filter screen 8 under the action of the spring 16 to achieve efficient cleaning of carbon deposits of different thicknesses.

[0032] In actual use, firstly, the second smoke pipe 3 is removed separately, and the fixing plate 7 is snapped into the annular groove on the surface of the second smoke pipe 3. Through the mutual attraction and adhesion of the first magnetic piece 10 and the second magnetic piece 11, the fixing plate 7 is firmly fixed on the annular groove. Then, the flange on the surface of the second smoke pipe 3 is aligned with the flange on the surface of the first smoke pipe 2 and the third smoke pipe 4, and bolts are used to tighten them. The fixing plate 7 is attached to the surface of the annular groove and the first smoke pipe 2 to achieve double limiting.

[0033] When the flue gas passes through the second flue pipe 3, it impacts the turbine blades 12, causing the turbine blades 12 to drive the rotating shaft 13 to rotate. The multiple scrapers 14 installed on the rotating shaft 13 also rotate accordingly. During the rotation, the scrapers 14 clean the surface of the filter screen 8, reducing carbon deposits and impurities on the surface of the filter screen 8 and improving the filtration effect of the filter screen 8. When the carbon deposits are thick, the spring 16 is compressed, which drives the sliding plate 17 to move. The sliding plate 17 drives the scrapers 14 to expand outward, increasing the contact pressure with the carbon deposits and ensuring the cleaning effect. After the carbon deposits are cleaned, the spring 16 returns to its original state, and the scrapers 14 return to their initial position.

[0034] After prolonged use, the second smoke pipe 3 can be removed from the surface of the first smoke pipe 2 and the third smoke pipe 4, and then the filter screen 8 can be taken out for cleaning.

[0035] 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 novel energy-saving and environmentally friendly waste heat recovery device for calcium carbide furnaces, characterized in that: Including calcium carbide furnace body (1), the surface of the calcium carbide furnace body (1) is fixedly connected with first flue (2), one end of the first flue (2) is provided with second flue (3), one end of the second flue (3) is provided with third flue (4), the surface of the third flue (4) is provided with air guide fan (5) at one end, one end of the air guide fan (5) is provided with waste heat boiler (6), the surface of the second flue (3) is clamped with fixed plate (7), the surface of the fixed plate (7) is fixedly connected with filter screen (8), the surface of the filter screen (8) is rotatably connected with rotating shaft (13), the surface of the rotating shaft (13) is provided with a plurality of scrapers (14).

2. The waste heat recovery device of a novel energy-saving and environment-friendly calcium carbide furnace according to claim 1, characterized in that: The surface of the calcium carbide furnace body (1) is provided with a ring groove, the surface of the ring groove is fixedly connected with a first magnetic sheet (10), the first magnetic sheet (10) is in a ring structure, the fixed plate (7) is clamped on the surface of the ring groove, and the fixed plate (7) is in a ring plate structure with a section of "L".

3. The waste heat recovery device of a novel energy-saving and environment-friendly calcium carbide furnace according to claim 2, characterized in that: The surface of the fixed plate (7) is fixedly connected with a sealing gasket (9), the sealing gasket (9) is in a ring structure, the sealing gasket (9) is clamped between the ring groove and the fixed plate (7), and the surface of the fixed plate (7) is fixedly connected with a second magnetic sheet (11) on one side, the first magnetic sheet (10) and the second magnetic sheet (11) are attracted and combined with each other.

4. The waste heat recovery device of a novel energy-saving and environment-friendly calcium carbide furnace according to claim 1, characterized in that: The surface of the filter screen (8) is fixedly connected with a limiting plate (18) at the center position, the limiting plate (18) is in a round plate structure with a section of "T" shape, the rotating shaft (13) is rotatably connected to the surface of the limiting plate (18), and the end of the rotating shaft (13) away from the filter screen (8) is provided with a turbine blade (12) on the surface.

5. The waste heat recovery device of a novel energy-saving and environment-friendly calcium carbide furnace according to claim 1, characterized in that: The surface of the rotating shaft (13) is provided with a plurality of sliding grooves (19) arranged in a circumferential array, the sliding groove (19) is in a "T" shape groove, the surface of the sliding groove (19) is fixedly connected with a guide rod (15), the guide rod (15) is in a cylindrical structure, and the surface of the guide rod (15) penetrates through a spring (16).

6. The waste heat recovery device of a novel energy-saving and environment-friendly calcium carbide furnace according to claim 5, characterized in that: One end of the spring (16) is fixedly connected to the top surface of the sliding groove (19), the other end of the spring (16) is fixedly connected with a sliding plate (17), the sliding plate (17) is in a "T" shaped plate structure, the sliding plate (17) is slidingly connected to the surface of the guide rod (15), and the scraper (14) is fixedly connected to the surface of the sliding plate (17).

7. The waste heat recovery device of a novel energy-saving and environment-friendly calcium carbide furnace according to claim 1, characterized in that: The end of the first flue (2), the second flue (3) and the third flue (4) close to each other is provided with a flange plate, and the flange plates are connected through bolts.

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