Vacuum equipment waste heat recycling structure for sintering machine

Abstract

The utility model discloses a vacuum equipment waste heat recycling structure for a sintering machine, which comprises a frame body, the top of the frame body is connected with an air inlet pipe in a penetrating way, partition plates are symmetrically arranged at the upper part in the frame body, air suction pipes are symmetrically arranged at the two sides in the frame body, and the air suction pipes are connected with the partition plates in a penetrating way; the air conditioner further comprises barrels fixedly installed below the exteriors of the two exhaust pipes, the barrels are fixedly connected with the frame body, heat exchange pipes are arranged outside the exhaust pipes, one ends of the heat exchange pipes penetrate through the barrels and the frame body to be connected with an air inlet cover in a penetrating mode, and a second fan is fixedly installed in the air inlet cover. The other end of the heat exchange tube penetrates through the barrel and the frame body and is connected with a high-temperature-resistant hose in a penetrating manner; according to the flue gas waste heat recovery device, when waste heat recovery is conducted on flue gas exhausted by vacuum equipment of the sintering machine, the flue gas can be purified, the situation that the working environment is affected after the flue gas is exhausted is prevented, cleaning is convenient, and practicability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sintering machines, in particular to a waste heat recovery and utilization structure for a vacuum device of a sintering machine. Background Technique

[0002] Sintering machines are applicable to the sintering operations of large-scale ferrous metallurgy sintering plants, and are mainly applicable to the sintering treatment of iron ore powder in large and medium-sized sintering plants.

[0003] Publication No. CN213021032U discloses a high-efficiency waste heat recovery and utilization device for sintering machine flue gas. In this patent, a centrifugal fan pumps high-temperature flue gas into an "L"-shaped air duct, and at the same time, an axial flow fan pumps air into a funnel-shaped air collecting hood. Then, in a heat preservation cylinder, a spiral heat exchange tube directly contacts and replaces the heat in the flue gas, uses the waste heat to heat cold air, and the cooled flue gas is then horizontally blown to the top of the impeller, so that the roller shaft between the bearing seats rotates driven by the impeller, and then drives a permanent magnet generator to generate electricity and outputs the electric energy to a storage battery as a power source, thereby comprehensively improving the utilization rate of waste heat flue gas. However, the following problems still exist in the actual use of this patent:

[0004] A centrifugal fan pumps high-temperature flue gas into an "L"-shaped air duct, and at the same time, an axial flow fan pumps air into a funnel-shaped air collecting hood. Then, in a heat preservation cylinder, a spiral heat exchange tube directly contacts and replaces the heat in the flue gas, uses the waste heat to heat cold air. However, in actual use, after the flue gas enters the frame, the flue gas discharged from sintering contains a certain amount of dust and harmful gases. During the waste heat recovery process, the flue gas is directly discharged after heat exchange, which will cause the flue gas to diffuse, so that the flue gas is discharged without being treated, affecting the working environment.

[0005] A waste heat recovery and utilization structure for a vacuum device of a sintering machine is proposed to solve the problems mentioned above. Content of the Utility Model

[0006] The purpose of the utility model is to provide a waste heat recovery and utilization structure for a vacuum device of a sintering machine to solve the problem that currently a centrifugal fan pumps high-temperature flue gas into an "L"-shaped air duct, and at the same time, an axial flow fan pumps air into a funnel-shaped air collecting hood. Then, in a heat preservation cylinder, a spiral heat exchange tube directly contacts and replaces the heat in the flue gas, uses the waste heat to heat cold air. However, in actual use, after the flue gas enters the frame, the flue gas discharged from sintering contains a certain amount of dust and harmful gases. During the waste heat recovery process, the flue gas is directly discharged after heat exchange, which will cause the flue gas to diffuse, so that the flue gas is discharged without being treated, affecting the working environment as mentioned in the above background technique.

[0007] To achieve the above object, the present utility model provides the following technical solutions: A waste heat recovery and utilization structure for a vacuum device of a sintering machine, including a frame body;

[0008] An air inlet pipe is connected through the top of the frame body, and partition plates are symmetrically installed above the interior of the frame body. Moreover, air extraction pipes are symmetrically arranged on both sides inside the frame body, and the air extraction pipes are connected through the partition plates;

[0009] It further includes:

[0010] Cylinders are fixedly installed below the outer parts of the two air extraction pipes, and the cylinders are fixedly connected to the frame body. Moreover, a heat exchange pipe is arranged outside the air extraction pipe, and one end of the heat exchange pipe passes through the cylinder and is connected through the frame body with an air inlet hood. And a second blower is fixedly installed inside the air inlet hood;

[0011] Wherein, the other end of the heat exchange pipe passes through the cylinder and the frame body and is connected through a high-temperature resistant hose. And one ends of the two high-temperature resistant hoses are connected through an air outlet pipe. Moreover, several air outlet ports are connected through the inner side of the air outlet pipe. And filter components are symmetrically arranged above the interior of the frame body;

[0012] Wherein, the filter component includes filter boxes symmetrically inserted above the interior of the frame body. And positioning strips are symmetrically installed below the two filter boxes inside the frame body. Moreover, a cover plate is arranged on the top of the filter box, and a sealing ring is fixedly installed at the bottom of the cover plate.

[0013] Preferably, two groups of limiting strips are symmetrically installed at the bottom of the cover plate and the bottom end inside the filter box respectively. And a filter layer and an activated carbon layer are respectively arranged between the two groups of limiting strips. Moreover, two groups of rotating rods are symmetrically rotatably connected on both sides of the two cover plates at the top of the frame body.

[0014] Preferably, telescopic springs are sleeved above the outer parts of the two groups of rotating rods. And a movable frame is movably connected below the telescopic springs on the outer part of the rotating rod. And two ends of the telescopic spring are respectively fixedly connected with the movable frame and the rotating rod.

[0015] Preferably, a positioning block is fixedly installed at the bottom of the movable frame above the cover plate. And two groups of positioning grooves are symmetrically opened on the top of the cover plate. And the positioning block is engaged with the positioning groove.

[0016] Preferably, fixed covers are fixedly installed below the cylinder body on the outer sides of the two air extraction pipes, a first fan is fixedly installed inside the fixed covers, an exhaust pipe penetrates and is connected to the lower side of one side of the fixed covers, and the exhaust pipe penetrates and is connected to the frame body. First bevel gears are fixedly installed on the outer sides of the output ends of the two first fans, a support frame is fixedly installed on the inner bottom end of the frame body on one side of the first fan, a rotating shaft is rotatably connected to the upper part inside the support frame, a second bevel gear is fixedly installed at one end of the rotating shaft, and the second bevel gear is meshed with the first bevel gear.

[0017] Preferably, the rotating shaft is rotatably connected to the fixed cover and the frame body, a rotating gear is fixedly installed at the other end of the rotating shaft, a driven gear is meshed with the outside of the rotating gear, one side of the driven gear is rotatably connected to the frame body, moving frames are symmetrically installed below the two sides of the outside of the air outlet pipe, sliding grooves are formed on the side of the moving frame close to the driven gear, a column block is fixedly installed on one side of the driven gear, and the column block is slidably connected to the sliding groove.

[0018] Preferably, mounting frames are symmetrically installed above the two sides of the air outlet pipe, support rods are symmetrically and slidably connected inside the two mounting frames, connecting frames are fixedly installed at both ends of the two support rods, and the connecting frames are fixedly connected to the frame body.

[0019] Compared with the prior art, the beneficial effects of the present utility model are as follows: For the waste heat recovery and utilization structure of the vacuum equipment of the sintering machine, when recovering the waste heat of the flue gas discharged from the vacuum equipment of the sintering machine, the flue gas can be purified to prevent the flue gas from affecting the working environment after being discharged, and it is convenient to clean, improving the practicability. The specific content is as follows:

[0020] 1. When recovering the waste heat of the flue gas discharged by the vacuum equipment of the sintering machine, the flue gas is introduced into the interior of the frame through the intake pipe. At the same time, two first blowers and two second blowers are driven. The first blower can extract air from the extraction pipe. Through grooves are provided on both sides of the filter box, and the flue gas can enter the filter box, filter dust through the filter layer, and absorb harmful substances through the activated carbon layer. Then the flue gas can enter the extraction pipe. The second blower can extract external air into the heat exchange pipe. The heat exchange pipe is evenly wound outside the extraction pipe, so that while the flue gas passes through the extraction pipe, the cold air in the heat exchange pipe can exchange heat. After the air in the heat exchange pipe exchanges heat, it passes through the high-temperature resistant hose into the outlet pipe. When the sintered material is located below the inner side of the frame, the outlet pipe can continuously spray the heat-exchanged gas to heat the material, so as to recover the waste heat of the discharged flue gas, and the waste heat of the flue gas can preheat the material. When it is necessary to clean or replace the filter layer or the activated carbon layer, move the movable frame upward so that the positioning block is separated from the positioning groove, and the rotating rod loses its limit. The rotating rod can be rotated to stagger the positioning block and the positioning groove, and the movable frame no longer blocks the cover plate, so that the cover plate can be removed, and the filter layer and the activated carbon layer can be cleaned. When recovering the waste heat of the flue gas discharged by the vacuum equipment of the sintering machine, the flue gas can be purified, preventing the flue gas from affecting the working environment after being discharged, and being convenient for cleaning, thus improving the practicability;

[0021] 2. While the two first blowers are operating, they can drive two rotating shafts to rotate synchronously in the same direction through the connection of the first bevel gear and the second bevel gear. Then, the rotating gear meshes with the driven gear to drive the column block to rotate circularly. While the column block rotates circularly, it slides in the sliding groove on the moving frame. Through the continuous rotation of the column block, the moving frame can be driven to move reciprocally, so that while recovering the waste heat of the flue gas, the outlet pipe can move reciprocally, and thus different positions of the material can be fully preheated, improving the preheating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic cross-sectional structure diagram of the present utility model;

[0023] Figure 2 is a schematic side structure diagram of the present utility model;

[0024] Figure 3 is the present utility model Figure 1 the enlarged structure diagram of area A in;

[0025] Figure 4 is the present utility model Figure 1 the enlarged structure diagram of area B in;

[0026] Figure 5 is the three-dimensional structure diagram of the outlet pipe of the present utility model;

[0027] Figure 6 This is a schematic cross-sectional structure diagram of the driven gear of the present utility model.

[0028] In the figure: 1. Frame body; 101. Air inlet pipe; 102. Partition board; 103. Air extraction pipe; 104. Fixed cover; 105. Exhaust pipe; 106. First blower; 107. Heat exchange pipe; 108. Air inlet hood; 109. Second blower; 110. High-temperature resistant hose; 111. Air outlet pipe; 112. First bevel gear; 113. Support frame; 114. Rotating shaft; 115. Second bevel gear; 116. Rotating gear; 117. Driven gear; 118. Column block; 119. Moving frame; 120. Sliding groove; 121. Mounting frame; 122. Support rod; 123. Connecting frame; 2. Filter assembly; 201. Filter box; 202. Positioning strip; 203. Cover plate; 204. Limiting strip; 205. Filter layer; 206. Activated carbon layer; 207. Rotating rod; 208. Telescopic spring; 209. Movable frame; 210. Positioning block; 211. Positioning groove. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying 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.

[0030] Please refer to Figures 1-6, the present utility model provides a technical solution: a waste heat recovery and utilization structure for a vacuum device of a sintering machine, including a frame body 1. An air inlet pipe 101 penetrates through the top of the frame body 1. Partition plates 102 are symmetrically installed above the interior of the frame body 1. Air extraction pipes 103 are symmetrically arranged on both sides inside the frame body 1, and the air extraction pipes 103 penetrate through the partition plates 102. It further includes: Cylinders are fixedly installed below the outer parts of the two air extraction pipes 103, and the cylinders are fixedly connected to the frame body 1. A heat exchange pipe 107 is arranged outside the air extraction pipe 103. One end of the heat exchange pipe 107 passes through the cylinder and penetrates through the frame body 1 to be connected with an air inlet hood 108. A second fan 109 is fixedly installed inside the air inlet hood 108. Among them, the other end of the heat exchange pipe 107 passes through the cylinder and the frame body 1 and is connected with a high-temperature resistant hose 110. One ends of the two high-temperature resistant hoses 110 are connected with an air outlet pipe 111. A number of air outlet openings are penetrated and connected to the inner side of the air outlet pipe 111. Filter assemblies 2 are symmetrically arranged above the interior of the frame body 1. Among them, the filter assembly 2 includes filter boxes 201 symmetrically inserted above the interior of the frame body 1. Positioning strips 202 are symmetrically installed below the two filter boxes 201 inside the frame body 1. A cover plate 203 is arranged on the top of the filter box 201. A sealing ring is fixedly installed at the bottom of the cover plate 203, so that when recovering waste heat from the flue gas discharged by the vacuum device of the sintering machine, the flue gas can be purified, preventing the flue gas from affecting the working environment after being discharged, and being convenient for cleaning, thus improving the practicability.

[0031] On the bottom of the cover plate 203 and the inner bottom end of the filter box 201, two groups of limiting strips 204 are symmetrically installed. Between the two groups of limiting strips 204, a filter layer 205 and an activated carbon layer 206 are respectively arranged. And on the top of the frame 1, two groups of rotating rods 207 are symmetrically and rotatably connected on both sides of the two cover plates 203, which can purify the flue gas. On the upper part of the outer part of the two rotating rods 207, two telescopic springs 208 are sleeved. And on the outer part of the rotating rod 207, below the telescopic spring 208, a movable frame 209 is movably connected. And the two ends of the telescopic spring 208 are respectively fixedly connected with the movable frame 209 and the rotating rod 207, so that the movable frame 209 can automatically reset after moving. On the bottom of the movable frame 209, above the cover plate 203, a positioning block 210 is fixedly installed. And on the top of the cover plate 203, two groups of positioning grooves 211 are symmetrically opened. And the positioning block 210 is engaged with the positioning groove 211, which can position the cover plate 203. On the outer part of the two exhaust pipes 103, below the cylinder body, two fixed covers 104 are fixedly installed. And inside the fixed cover 104, a first fan 106 is fixedly installed. And on one side below the fixed cover 104, an exhaust pipe 105 is penetrated and connected. And the exhaust pipe 105 is penetrated and connected with the frame 1. And on the outer part of the output end of the two first fans 106, two first bevel gears 112 are fixedly installed. And on the inner bottom end of the frame 1, on one side of the first fan 106, a support frame 113 is fixedly installed. And inside the support frame 113, above, a rotating shaft 114 is rotatably connected. And on one end of the rotating shaft 114, a second bevel gear 115 is fixedly installed. And the second bevel gear 115 is meshed with the first bevel gear 112, so that when the first fan 106 operates, it can drive the rotating shaft 114 to rotate. The rotating shaft 114 is rotatably connected with the fixed cover 104 and the frame 1. And on the other end of the rotating shaft 114, a rotating gear 116 is fixedly installed. And on the outer part of the rotating gear 116, a driven gear 117 is meshed. And on one side of the driven gear 117, it is rotatably connected with the frame 1. And on the outer sides below the two sides of the air outlet pipe 111, two movable frames 119 are symmetrically installed. And on the side of the movable frame 119 close to the driven gear 117, a sliding groove 120 is opened. And on one side of the driven gear 117, a column block 118 is fixedly installed. And the column block 118 is slidably connected with the sliding groove 120, so that the rotation of the rotating shaft 114 can drive the column block 118 to rotate in a circle, so that the air outlet pipe 111 reciprocates. On the upper sides of the two sides of the air outlet pipe 111, two mounting frames 121 are symmetrically installed. And inside the two mounting frames 121, two support rods 122 are symmetrically slidably connected. And on both ends of the two support rods 122, a connecting frame 123 is fixedly installed. And the connecting frame 123 is fixedly connected with the frame 1 to limit the movement of the air outlet pipe 111.

[0032] Working principle: Before using this structure for heat recovery and utilization of the waste heat of the vacuum equipment for the sintering machine, it is necessary to first check the overall situation of the device to determine that it can work normally. According to Figure 1 -Figure 6 As shown in the figure, when recovering the waste heat of the flue gas discharged by the sintering machine vacuum equipment, the flue gas enters the inside of the frame body 1 through the air inlet pipe 101. At the same time, two first blowers 106 and two second blowers 109 are driven. The first blower 106 can extract air from the air extraction pipe 103. Through grooves are formed on both sides of the filter box 201, and the flue gas can enter the filter box 201, filter dust through the filter layer 205, and absorb harmful substances through the activated carbon layer 206. Then the flue gas can enter the air extraction pipe 103. The second blower 109 can extract external air into the heat exchange pipe 107. The heat exchange pipe 107 is evenly wound outside the air extraction pipe 103, so that while the flue gas passes through the air extraction pipe 103, the cold air in the heat exchange pipe 107 can exchange heat. After the air in the heat exchange pipe 107 exchanges heat, it passes through the high-temperature resistant hose 110 and enters the air outlet pipe 111. When the sintered material is located below the inner side of the frame body 1, the air outlet pipe 111 can continuously eject the heated gas to heat the material, so as to recover the waste heat of the discharged flue gas and preheat the material with the waste heat of the flue gas. When it is necessary to clean or replace the filter layer 205 or the activated carbon layer 206, move the movable frame 209 upward so that the positioning block 210 is separated from the positioning groove 211, and the rotating rod 207 loses its limit. The rotating rod 207 can be rotated to stagger the positioning block 210 and the positioning groove 211, and the movable frame 209 no longer blocks the cover plate 203, so that the cover plate 203 can be removed, and the filter layer 205 and the activated carbon layer 206 can be cleaned. When recovering the waste heat of the flue gas discharged by the vacuum equipment of the sintering machine, the flue gas can be purified, preventing the flue gas from affecting the working environment after being discharged, and being convenient for cleaning, thus improving the practicability;

[0033] While the two first blowers 106 are operating, the two rotating shafts 114 can be driven to rotate in the same direction and synchronously by connecting the first bevel gear 112 and the second bevel gear 115. Then, the column block 118 is driven to rotate in a circle by the meshing of the rotating gear 116 and the driven gear 117. While the column block 118 rotates in a circle, it slides in the sliding groove 120 on the moving frame 119. By continuously rotating the column block 118, the moving frame 119 can be driven to move reciprocally, so that while recovering the waste heat of the flue gas, the air outlet pipe 111 can move reciprocally, and thus different positions of the material can be fully preheated, improving the preheating efficiency.

[0034] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waste heat recovery structure for a vacuum device of a sintering machine, comprising a frame body (1); An air inlet pipe (101) is connected through the top of the frame body (1), and partition plates (102) are symmetrically installed above the interior of the frame body (1). Air extraction pipes (103) are symmetrically arranged on both sides inside the frame body (1), and the air extraction pipes (103) are connected through the partition plates (102); It is characterized in that It further includes: Cylinders are fixedly installed below the outer parts of both air extraction pipes (103), and the cylinders are fixedly connected to the frame body (1). A heat exchange pipe (107) is arranged outside the air extraction pipes (103). One end of the heat exchange pipe (107) passes through the cylinder and is connected through the frame body (1) to an air inlet hood (108), and a second fan (109) is fixedly installed inside the air inlet hood (108); Wherein, the other end of the heat exchange pipe (107) passes through the cylinder and the frame body (1) and is connected through a high-temperature resistant hose (110). One ends of the two high-temperature resistant hoses (110) are connected through an air outlet pipe (111), and several air outlet openings are connected through the inner side of the air outlet pipe (111). Filter components (2) are symmetrically arranged above the interior of the frame body (1); Wherein, the filter component (2) includes filter boxes (201) symmetrically inserted above the interior of the frame body (1). Positioning bars (202) are symmetrically installed below the two filter boxes (201) inside the frame body (1). A cover plate (203) is arranged on the top of the filter box (201), and a sealing ring is fixedly installed at the bottom of the cover plate (203).

2. The waste heat recovery and utilization structure of the vacuum equipment for a sintering machine according to claim 1, characterized in that: Two groups of limiting bars (204) are symmetrically installed at the bottom of the cover plate (203) and the inner bottom end of the filter box (201). A filter layer (205) and an activated carbon layer (206) are respectively arranged between the two groups of limiting bars (204). Two groups of rotating rods (207) are symmetrically rotatably connected to both sides of the two cover plates (203) at the top of the frame body (1).

3. The waste heat recovery and utilization structure of the vacuum device for a sintering machine according to claim 2, wherein: Two telescopic springs (208) are sleeved above the outer parts of the two groups of rotating rods (207). An activity frame (209) is movably connected below the telescopic springs (208) on the outer part of the rotating rod (207). Both ends of the telescopic spring (208) are fixedly connected to the activity frame (209) and the rotating rod (207) respectively.

4. The waste heat recovery and utilization structure of the vacuum equipment for a sintering machine according to claim 3, characterized in that: A positioning block (210) is fixedly installed at the bottom of the activity frame (209) above the cover plate (203). Two groups of positioning grooves (211) are symmetrically opened on the top of the cover plate (203), and the positioning block (210) is engaged with the positioning groove (211).

5. The waste heat recovery and utilization structure of the vacuum device for a sintering machine according to claim 1, characterized in that: Below the cylinder body, fixed covers (104) are fixedly installed outside both of the two air extraction pipes (103). A first fan (106) is fixedly installed inside the fixed cover (104). A exhaust pipe (105) penetrates and is connected below one side of the fixed cover (104). The exhaust pipe (105) is penetratively connected with the frame body (1). On the outside of the output ends of both first fans (106), first bevel gears (112) are fixedly installed. At the bottom end inside the frame body (1), a support frame (113) is fixedly installed on one side of the first fan (106). Above the inside of the support frame (113), a rotating shaft (114) is rotatably connected. At one end of the rotating shaft (114), a second bevel gear (115) is fixedly installed. The second bevel gear (115) is meshed and connected with the first bevel gear (112).

6. The waste heat recovery and utilization structure of the vacuum equipment for a sintering machine according to claim 5, characterized in that: The rotating shaft (114) is rotatably connected with the fixed cover (104) and the frame body (1). At the other end of the rotating shaft (114), a rotating gear (116) is fixedly installed. A driven gear (117) is meshed outside the rotating gear (116). One side of the driven gear (117) is rotatably connected with the frame body (1). On the lower sides of both outer sides of the air outlet pipe (111), moving brackets (119) are symmetrically installed. A sliding groove (120) is formed on one side of the moving bracket (119) close to the driven gear (117). On one side of the driven gear (117), a column block (118) is fixedly installed. The column block (118) is slidably connected with the sliding groove (120).

7. The waste heat recovery and utilization structure of the vacuum equipment for a sintering machine according to claim 6, characterized in that: On the upper sides of both sides of the air outlet pipe (111), mounting brackets (121) are symmetrically installed. Inside both mounting brackets (121), support rods (122) are symmetrically and slidably connected. At both ends of both support rods (122), connecting brackets (123) are fixedly installed. The connecting brackets (123) are fixedly connected with the frame body (1).

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