Tail gas waste heat recovery device in drying equipment

Abstract

The utility model belongs to the technical field of drying equipment, and particularly relates to a tail gas waste heat recovery device in the drying equipment, which comprises a heat exchange box, a heat exchange tube, a waste heat recovery device and a heat exchange pipe, the left end of the bottom and the right end of the top of the heat exchange pipe penetrate through the left inner wall and the right inner wall of the heat exchange box correspondingly and extend out of the heat exchange box. The right side of the filter box is fixedly communicated with the left end of the heat exchange pipe; the right end of the sealing door is hinged to the front side of the filtering box, the left end of the sealing door and the filtering box are clamped, and the smoke outlet is connected with a pipe. According to the smoke waste heat recycling device, smoke exhausted by drying equipment is filtered through a simple structure, waste heat is recycled, and heat pollution and heat energy waste are avoided; and harmful substances in the flue gas are filtered and removed, so that air pollution can be avoided, the environmental protection property is improved, and the practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a tail gas waste heat recovery device in drying equipment. Background Art

[0002] China is rich in solid fuel resources, and solid fuels account for the largest proportion of our energy consumption. However, solid fuels often contain a certain amount of moisture. Direct transportation increases transportation costs, while direct use reduces thermal efficiency. Therefore, solid fuels are typically dried using drying equipment to remove some of the moisture before reuse.

[0003] In the prior art, a Chinese patent document with application number: 201821334904.8 discloses a drying device. It can improve the operating stability and service life of the drying equipment. The embodiment of the utility model provides a drying device, comprising: a shell, the shell comprises an insulation layer and a heat-conducting layer from the outside to the inside; wherein the heat-conducting layer is a silicon carbide refractory material layer; the shell is used to pass the material to be dried and the heat medium, so that the water in the material to be dried evaporates under the heating or heat exchange action of the heat medium to dry the material to be dried. The setting of the structure of the utility model prevents the condensation of steam in the shell from causing corrosion and wear of the equipment by the dust-containing corrosive medium, thereby improving the thermal efficiency of the system. The embodiment of the utility model is used for coal powder drying.

[0004] However, in the above technical solution, the flue gas containing SO2, SO3 and dust generated during the drying process of the material to be dried is directly discharged to the outside through the flue gas outlet. This process not only causes thermal pollution and waste of heat energy, but also the harmful substances in the flue gas will cause significant pollution to the air, and the environmental protection is poor. Therefore, we propose a tail gas waste heat recovery device in the drying equipment to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the prior art in that the flue gas containing SO2, SO3 and dust generated during the drying process of the material to be dried is directly discharged to the outside through the flue gas outlet, which not only causes heat pollution and waste of heat energy, but also the harmful substances in the flue gas also cause great pollution to the air, and has poor environmental protection. A tail gas waste heat recovery device is proposed in the drying equipment.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A tail gas waste heat recovery device in a drying device includes a heat exchange box, and the waste heat recovery device also includes:

[0008] The heat exchange tube is arranged inside the heat exchange box, and the bottom left end and the top right end of the heat exchange tube respectively penetrate the left inner wall and the right inner wall of the heat exchange box and extend to the outside of the heat exchange box;

[0009] A filter box, the right side of which is fixedly connected to the left end of the heat exchange tube;

[0010] A sealing door, wherein the right end of the sealing door is hinged to the front side of the filter box, and the left end of the sealing door is clamped between the filter box;

[0011] a flue gas outlet connecting pipe, the right end of which is fixedly connected to the right side of the filter box;

[0012] A filter assembly, comprising: a dust-proof filter layer, a soda-lime filter layer, and an activated carbon filter layer; the dust-proof filter layer, the soda-lime filter layer, and the activated carbon filter layer are all detachably plugged into the interior of the filter box; sliders are fixedly installed on the left and right sides of the dust-proof filter layer, the left and right sides of the soda-lime filter layer, and the left and right sides of the activated carbon filter layer; slide grooves are provided on the left and right inner walls of the filter box; there are six slide grooves; the sliders are slidably connected in the corresponding slide grooves; the front ends of the dust-proof filter layer, the soda-lime filter layer, and the activated carbon filter layer are all in contact with the rear side of the sealed door;

[0013] The stirring component is arranged inside the heat exchange box and is used to stir the water.

[0014] As a preferred solution of the present invention, a water inlet is provided on the left side of the heat exchange box, and a drain outlet is provided on the right side of the heat exchange box.

[0015] As a preferred solution of the present invention, a fan is fixedly installed on the right end of the heat exchange tube.

[0016] As a preferred solution of the present invention, an observation window is provided on the sealed door.

[0017] As a preferred solution of the present invention, the stirring assembly includes a motor, a rotating shaft and a stirring rod. The motor is fixedly mounted on the top of the heat exchange box. The output shaft of the motor passes through the top of the heat exchange box and extends to the interior of the heat exchange box. The output shaft of the motor is fixedly mounted on the top of the rotating shaft. Multiple stirring rods are fixedly mounted on the rotating shaft.

[0018] As a preferred solution of the present invention, a plurality of through holes are provided on the stirring rod.

[0019] Beneficial effects:

[0020] 1. Connect the flue gas outlet connecting pipe to the flue gas outlet of the drying equipment. At this time, the flue gas can enter the interior of the filter box through the flue gas outlet connecting pipe, and then pass through the dust-proof filter layer to preliminarily filter the dust in the flue gas. Then, when the filtered flue gas passes through the soda-lime filter layer, the SO3 in the flue gas will react with the alkaline substances in the soda-lime filter layer and be absorbed by the soda-lime filter layer. Finally, the flue gas will pass through the activated carbon filter layer and adsorb the SO2 in the flue gas through the activated carbon filter layer, thereby achieving harmless filtration treatment of the flue gas. Finally, the filtered flue gas will enter the interior of the heat exchange box through the heat exchange pipe. At this time, the heat in the flue gas will be transferred to the water inside the heat exchange box through the heat exchange pipe, thereby realizing heat exchange operation and achieving flue gas waste heat recovery operation. This method avoids heat pollution and heat energy waste, and by filtering and removing harmful substances in the flue gas, it can also avoid air pollution and improve environmental protection.

[0021] 2. By starting the motor, the shaft and multiple stirring rods can be driven to rotate, which can achieve the stirring of the water, thereby realizing the circulation of water inside the heat exchange box, improving the efficiency and effect of water absorbing heat, thereby improving the efficiency and effect of heat exchange;

[0022] The utility model realizes filtering the flue gas discharged by the drying equipment and recovering the waste heat through a simple structure, thus avoiding heat pollution and waste of heat energy. It also avoids air pollution by filtering and removing harmful substances in the flue gas, thus improving environmental protection and having strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional main view of the structure of the utility model;

[0024] Figure 2 This is a three-dimensional rear view of the structure of the utility model;

[0025] Figure 3 A three-dimensional diagram of the structure of the heat exchange tube, rotating shaft, stirring rod and through hole of the utility model;

[0026] Figure 4 This is a structural sectional view of the filter box of the present invention.

[0027] In the figure: 1. Heat exchange box; 2. Heat exchange tube; 3. Filter box; 4. Flue gas outlet connecting pipe; 5. Sealing door; 6. Observation window; 7. Dust-proof filter layer; 8. Soda lime filter layer; 9. Activated carbon filter layer; 10. Slider; 11. Chute; 12. Fan; 13. Water inlet; 14. Drain outlet; 15. Motor; 16. Rotating shaft; 17. Stirring rod; 18. Through hole. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Example

[0030] Reference Figure 1-Figure 4 A waste heat recovery device for tail gas in a drying device includes a heat exchange box 1, and the waste heat recovery device also includes:

[0031] The heat exchange tube 2 is disposed inside the heat exchange box 1. The bottom left end and the top right end of the heat exchange tube 2 respectively penetrate the left inner wall and the right inner wall of the heat exchange box 1 and extend to the outside of the heat exchange box 1.

[0032] Filter box 3, the right side of the filter box 3 is fixedly connected to the left end of the heat exchange tube 2;

[0033] Sealing door 5, the right end of the sealing door 5 is hinged to the front side of the filter box 3, and the left end of the sealing door 5 is clamped between the filter box 3;

[0034] The right end of the smoke outlet connecting pipe 4 is fixedly connected to the right side of the filter box 3;

[0035] The filter assembly includes: a dust-proof filter layer 7, a soda-lime filter layer 8 and an activated carbon filter layer 9. The dust-proof filter layer 7, the soda-lime filter layer 8 and the activated carbon filter layer 9 can all be detachably inserted into the interior of the filter box 3. Sliders 10 are fixedly installed on the left and right sides of the dust-proof filter layer 7, the left and right sides of the soda-lime filter layer 8 and the left and right sides of the activated carbon filter layer 9. Sliders 11 are provided on the left and right inner walls of the filter box 3. There are six slides 11. The slides 10 are slidably connected in the corresponding slides 11. The front ends of the dust-proof filter layer 7, the soda-lime filter layer 8 and the activated carbon filter layer 9 are in contact with the rear side of the sealing door 5.

[0036] The stirring component is arranged inside the heat exchange box 1 and is used to stir the water.

[0037] By means of the above structure: the flue gas outlet connecting pipe 4 is connected to the flue gas outlet of the drying equipment, and the flue gas can enter the interior of the filter box 3 through the flue gas outlet connecting pipe 4, and then pass through the dustproof filter layer 7 to preliminarily filter the dust in the flue gas. Then, when the filtered flue gas passes through the soda lime filter layer 8, the SO3 in the flue gas will react with the alkaline substances in the soda lime filter layer 8, and thus be absorbed by the soda lime filter layer 8. Finally, the flue gas will pass through the activated carbon filter layer 9 and the SO2 in the flue gas will be adsorbed by the activated carbon filter layer 9, thereby achieving harmless filtration treatment of the flue gas. Finally, the filtered flue gas will enter the interior of the heat exchange box 1 through the heat exchange pipe 2. At this time, the heat in the flue gas will be transferred to the water inside the heat exchange box 1 through the heat exchange pipe 2, thereby realizing heat exchange operation, and achieving flue gas waste heat recovery operation. In this way, thermal pollution and heat energy waste are avoided, and by filtering and removing harmful substances in the flue gas, air pollution can also be avoided, thereby improving environmental protection.

[0038] As a preferred solution of the present invention, a water inlet 13 is provided on the left side of the heat exchange box 1, and a drain outlet 14 is provided on the right side of the heat exchange box 1. By setting the water inlet 13, water can be added to the interior of the heat exchange box 1, and by setting the drain outlet 14, the heated water can be discharged for use.

[0039] As a preferred solution of the present invention, a fan 12 is fixedly installed at the right end of the heat exchange tube 2. The fan 12 can provide power for the transportation of the flue gas.

[0040] As a preferred solution of the present invention, an observation window 6 is provided on the sealed door 5. The observation window 6 allows personnel to easily check the usage of the dustproof filter layer 7, the soda lime filter layer 8 and the activated carbon filter layer 9, so as to facilitate timely cleaning and replacement.

[0041] As a preferred solution of the present invention, the stirring assembly includes a motor 15, a rotating shaft 16 and a stirring rod 17. The motor 15 is fixedly mounted on the top of the heat exchange box 1. The output shaft of the motor 15 passes through the top of the heat exchange box 1 and extends to the interior of the heat exchange box 1. The output shaft of the motor 15 is fixedly mounted on the top of the rotating shaft 16. Multiple stirring rods 17 are fixedly mounted on the rotating shaft 16. By starting the motor 15, the rotating shaft 16 and the multiple stirring rods 17 can be driven to rotate. At this time, the water can be stirred, thereby realizing the circulation of water inside the heat exchange box 1, improving the efficiency and effect of water absorbing heat, thereby improving the heat exchange efficiency and effect.

[0042] As a preferred solution of the present invention, a plurality of through holes 18 are provided on the stirring rod 17 . The through holes 18 can reduce the resistance of water to the stirring rod 17 .

[0043] It should be noted that the specific type of motor 15 to be used is a matter for those skilled in the art to select, and the above-mentioned motor 15 belongs to the existing technology and will not be elaborated in this solution.

[0044] The working principle of the present invention is as follows: when in use, the smoke outlet connecting pipe 4 is first connected to the smoke outlet of the drying equipment, and then the smoke can enter the interior of the filter box 3 through the smoke outlet connecting pipe 4, and then the dust in the smoke is preliminarily filtered through the dustproof filter layer 7, and then when the filtered smoke passes through the soda lime filter layer 8, the SO3 in the smoke will react with the alkaline substances in the soda lime filter layer 8, and thus be absorbed by the soda lime filter layer 8, and finally the smoke will pass through the activated carbon filter layer 9 and the SO2 in the smoke will be adsorbed by the activated carbon filter layer 9, thereby achieving harmless filtration treatment of the smoke, and finally the filtered smoke It will enter the interior of the heat exchange box 1 through the heat exchange tube 2. At this time, the heat in the flue gas will be transferred to the water inside the heat exchange box 1 through the heat exchange tube 2, thereby realizing the heat exchange operation and achieving the flue gas waste heat recovery operation. In this way, thermal pollution and heat energy waste are avoided, and by filtering and removing harmful substances in the flue gas, air pollution can also be avoided, thereby improving environmental protection. In addition, by starting the motor 15, the rotating shaft 16 and multiple stirring rods 17 can be driven to rotate, and the water can be stirred, thereby realizing the circulation of water inside the heat exchange box 1, improving the water's heat absorption efficiency and effect, thereby improving the heat exchange efficiency and effect.

[0045] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A tail gas waste heat recovery device in a drying device, comprising a heat exchange box (1), characterized in that: The waste heat recovery device also includes: A heat exchange tube (2), wherein the heat exchange tube (2) is arranged inside the heat exchange box (1), and the bottom left end and the top right end of the heat exchange tube (2) respectively penetrate the left inner wall and the right inner wall of the heat exchange box (1) and extend to the outside of the heat exchange box (1); A filter box (3), the right side of which is fixedly connected to the left end of the heat exchange tube (2); A sealing door (5), wherein the right end of the sealing door (5) is hinged to the front side of the filter box (3), and the left end of the sealing door (5) is clamped to the filter box (3); a smoke outlet connecting pipe (4), the right end of which is fixedly connected to the right side of the filter box (3); A filter assembly, the filter assembly comprising: a dustproof filter layer (7), an alkali lime filter layer (8) and an activated carbon filter layer (9); the dustproof filter layer (7), the alkali lime filter layer (8) and the activated carbon filter layer (9) can all be detachably inserted into the interior of the filter box (3); sliders (10) are fixedly installed on the left and right sides of the dustproof filter layer (7), the left and right sides of the alkali lime filter layer (8) and the left and right sides of the activated carbon filter layer (9); a slide groove (11) is provided on the left inner wall and the right inner wall of the filter box (3); the number of the slide grooves (11) is six; the sliders (10) are slidably connected in the corresponding slide grooves (11); the front ends of the dustproof filter layer (7), the alkali lime filter layer (8) and the activated carbon filter layer (9) are in contact with the rear side of the sealing door (5); A stirring component is provided inside the heat exchange box (1), and is used to stir water.

2. The tail gas waste heat recovery device in a drying device according to claim 1, characterized in that: A water inlet (13) is provided on the left side of the heat exchange box (1), and a water outlet (14) is provided on the right side of the heat exchange box (1).

3. The tail gas waste heat recovery device in a drying device according to claim 1, characterized in that: A fan (12) is fixedly mounted on the right end of the heat exchange tube (2).

4. The tail gas waste heat recovery device in a drying device according to claim 1, characterized in that: The sealing door (5) is provided with an observation window (6).

5. The tail gas waste heat recovery device in a drying device according to claim 1, characterized in that: The stirring assembly comprises a motor (15), a rotating shaft (16) and a stirring rod (17); the motor (15) is fixedly mounted on the top of the heat exchange box (1); the output shaft of the motor (15) passes through the top of the heat exchange box (1) and extends into the interior of the heat exchange box (1); the output shaft of the motor (15) is fixedly mounted on the top of the rotating shaft (16); and a plurality of stirring rods (17) are fixedly mounted on the rotating shaft (16).

6. The tail gas waste heat recovery device in a drying device according to claim 5, characterized in that: The stirring rod (17) is provided with a plurality of through holes (18).

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