Briquette coal drying machine with waste heat recycling structure

Abstract

The utility model relates to the technical field of briquette coal drying equipment, and particularly discloses a briquette coal drying machine with a waste heat recycling structure, which comprises a drying box, a recycling pipe communicated with the drying box, a circulating pump arranged at the end part of the recycling pipe, an air inlet pipe arranged between the output end of the circulating pump and the drying box, and an auxiliary heating device arranged at the peripheral end of the air inlet pipe, a plurality of filter screens are arranged in the recycling pipe, a collecting bin located below the filter screens is arranged at the bottom of the side wall of the recycling pipe, an electrostatic electrode is arranged at the bottom of the recycling pipe, an electrostatic generator for supplying power to the electrostatic electrode is arranged in the collecting bin, and a through groove communicated with the collecting bin and a cover plate capable of covering the through groove are arranged at the bottom of the recycling pipe. A driving mechanism for driving the cover plate to move is arranged in the collecting bin, and the problem that in the traditional briquette coal drying process, hot air used for drying briquette coal is directly discharged outwards after being filtered, and heat source waste is caused is solved.

Description

Technical Field

[0001] This application relates to the technical field of briquette drying equipment, and specifically discloses a briquette dryer with a waste heat recovery and utilization structure. Background Technology

[0002] Briquettes are a type of coal product made by mixing raw materials such as pulverized coal and coal slime with binders or desulfurizing agents and then mechanically pressing them into block-shaped fuels. They have specific shapes, sizes and physical and chemical properties. Their core purpose is to overcome the natural defects of raw coal (such as high moisture content, low calorific value and high pollution) and improve the utilization efficiency and environmental performance of coal through processing.

[0003] Moisture needs to be added during the molding of coal briquettes to enhance their plasticity, but excessive moisture will reduce their cold compressive strength. Therefore, drying is necessary to reduce their moisture content. After drying, the moisture content should be controlled below 2%, which can significantly improve the mechanical strength of the coal briquettes and reduce damage during transportation and storage.

[0004] Currently, briquette drying is usually carried out using a dryer. The briquette is placed inside the dryer, and hot air is then introduced to dry it. However, during the drying process, the hot air used to dry the briquette is directly discharged after filtration, which not only wastes heat resources but also increases the external ambient temperature, making the external working environment more severe. In view of this, this utility model provides a briquette dryer with a waste heat recovery and utilization structure to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the traditional briquette drying process, the hot air used to dry the briquettes is directly discharged after being filtered, resulting in a waste of heat source.

[0006] To achieve the above objectives, the basic solution of this utility model provides a briquette dryer with a waste heat recovery and utilization structure, including a drying box, a recovery pipe connected to the drying box, a circulation pump located at the end of the recovery pipe, an air inlet pipe located between the output end of the circulation pump and the drying box, and an auxiliary heating device located at the periphery of the air inlet pipe.

[0007] The recycling pipe is equipped with several filter screens. The bottom of the side wall of the recycling pipe is equipped with a collection chamber located below the filter screens. The bottom of the recycling pipe is equipped with an electrostatic electrode. The collection chamber is equipped with an electrostatic generator that supplies power to the electrostatic electrode. The bottom of the recycling pipe is equipped with a through groove that communicates with the collection chamber and a cover plate that can cover the through groove. The collection chamber is equipped with a drive mechanism that drives the cover plate to move.

[0008] The principle and effect of this basic scheme are as follows:

[0009] Compared with existing technologies, this invention intercepts coal dust particles in the recovery pipe through a filter screen and generates static electricity on the electrostatic electrodes using an electrostatic generator to adsorb the coal dust particles, thereby filtering the hot air. The filtered coal dust particles are then collected in a collection bin, preventing coal dust leakage from affecting the service life of equipment such as the circulating pump and avoiding waste of coal dust particles. The filtered hot air is then driven into the air inlet pipe by the circulating pump, and after being reheated, it enters the drying chamber to dry the briquettes. This effectively improves the utilization of waste heat from the hot air, reduces energy waste, and avoids raising the external ambient temperature. It also solves the problem in traditional briquette drying processes where the hot air used to dry the briquettes is directly discharged after filtration, resulting in heat waste.

[0010] Furthermore, the driving mechanism includes an electromagnet disposed within the collection chamber, a magnet disposed on the cover plate and magnetically attracted to the electromagnet, and a return spring disposed between the magnet and the collection chamber. By utilizing the magnetic effect generated when the electromagnet is energized, and employing the electromagnet for mutual attraction between the magnets and the elastic potential energy of the return spring for resetting, the movement of the cover plate can be conveniently controlled. Simultaneously, the magnetic field generated when the electromagnet is energized can also attract coal dust particles within the recovery pipe, further improving the collection efficiency of the coal dust particles.

[0011] Furthermore, the driving mechanism also includes a guide rod disposed within the collection chamber and a sliding plate slidably connected to the guide rod. The magnet is disposed within the sliding plate, and the return spring is sleeved on the guide rod and located between the sliding plate and the inner wall of the collection chamber. This serves to limit and guide the movement of the cover plate.

[0012] Furthermore, the guide rod is an arc-shaped pipe adapted to the recovery pipe, which improves the sealing performance between the cover plate and the recovery pipe.

[0013] Furthermore, the cover plates are symmetrically arranged at the bottom of the recovery pipe, and each cover plate has an elastic sealing gasket on its closest side. This improves the sealing performance between the cover plates and allows coal dust particles to fall from the bottom of the recovery pipe into the collection bin.

[0014] Furthermore, the cover plate includes an inner plate located within the through groove and an outer plate connected to the inner plate and rotatably sealed to the outer wall of the recovery pipe. This further improves the sealing performance between the cover plate and the recovery pipe.

[0015] Furthermore, the auxiliary heating device includes an auxiliary heating box and an electric heating wire disposed inside the auxiliary heating box and sleeved on the air inlet pipe, so as to facilitate the reheating of the recovered hot air. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of a briquette dryer with a waste heat recovery and utilization structure according to an embodiment of this application is shown;

[0018] Figure 2 This paper shows a schematic diagram of the inside of the recovery pipe in a briquette dryer with a waste heat recovery and utilization structure according to an embodiment of this application;

[0019] Figure 3 A schematic diagram of the drive mechanism in a briquette dryer with a waste heat recovery and utilization structure proposed in an embodiment of this application is shown. Detailed Implementation

[0020] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0021] The reference numerals in the accompanying drawings include: drying box 1, filter section 2, recovery section 3, circulating pump 4, auxiliary heating device 5, support bracket 6, auxiliary exhaust fan 7, filter screen 8, cover plate 9, collection bin 10, electromagnet 11, guide rod 12, sliding plate 13, and return spring 14.

[0022] A briquette dryer with a waste heat recovery and utilization structure, implementing, for example... Figure 1 As shown: It includes a drying chamber 1, a recovery pipe connected to the side wall of the drying chamber 1 and recovering the hot air in the drying chamber 1, a circulation pump 4 located at the end of the recovery pipe, an air inlet pipe located at the output end of the circulation pump 4 and connected to the top of the drying chamber 1 to guide the hot air back to the drying chamber 1, and an auxiliary heating device 5 located at the periphery of the air inlet pipe. The drying chamber 1 has a door on the side away from the recovery pipe. The recovery pipe is U-shaped and includes a filter section 2, a vertical section and a recovery section 3 connected in sequence, so that the hot air in the drying chamber 1 can be recycled after the coal powder particles are removed by filtration. The end of the recovery section 3 near the circulation pump 4 is also provided with an air inlet branch pipe. The auxiliary heating device 5 includes an auxiliary heating box and an electric heating wire located in the auxiliary heating box and sleeved on the air inlet pipe.

[0023] like Figure 2As shown, the recovery pipe is installed and fixed by the bracket 6. The recovery pipe is equipped with an auxiliary fan 7 and several filter screens 8. The bottom of the side wall of the recovery pipe is equipped with a collection chamber 10 located below the filter screens 8. The bottom of the recovery pipe is equipped with an electrostatic electrode. The collection chamber 10 is equipped with an electrostatic generator that supplies power to the electrostatic electrode. The bottom of the recovery pipe is equipped with a through groove that communicates with the collection chamber 10 and a cover plate 9 that can cover the through groove. The collection chamber 10 is equipped with a drive mechanism that drives the cover plate 9 to move.

[0024] like Figure 3 As shown, the cover plate 9 includes an inner plate body located in the through groove, an outer plate body connected to the inner plate body and rotatably sealed to the outer wall of the recycling pipe, and a drive mechanism including a guide rod 12 located in the collection chamber 10, a sliding plate 13 slidably connected to the guide rod 12 and fixed to the cover plate 9, an electromagnet 11 located in the collection chamber 10, a magnet located in the sliding plate 13 and magnetically attracted to the electromagnet 11, and a reset spring 14 sleeved on the guide rod 12 and located between the sliding plate 13 and the collection chamber 10. The guide rod 12 is an arc-shaped pipe with the same center as the recycling pipe and a diameter larger than that of the recycling pipe. The two cover plates 9 are symmetrically arranged at the bottom of the recycling pipe and are driven by two drive mechanisms respectively. The sides of the cover plates 9 that are close to each other are provided with elastic sealing gaskets to improve the sealing performance when the two cover plates 9 are in contact.

[0025] This invention uses a filter screen 8 to intercept coal dust particles in the recovery pipe and an electrostatic generator to generate static electricity on the electrostatic electrode to adsorb the coal dust particles, thereby filtering the hot air. The filtered coal dust particles are collected in a collection bin 10, preventing coal dust leakage from affecting the service life of equipment such as the circulating pump 4 and avoiding waste of coal dust particles. The filtered hot air is then driven by the circulating pump 4 into the air inlet pipe, and after being reheated, it enters the drying chamber 1 to dry the briquettes. This effectively improves the utilization of waste heat from the hot air, reduces energy waste, and avoids an increase in the external ambient temperature. It also solves the problem in traditional briquette drying processes where the hot air used to dry the briquettes is directly discharged after filtration, resulting in heat waste.

[0026] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any indirect modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A briquette dryer with a waste heat recovery and utilization structure, characterized in that: It includes a drying chamber, a recovery pipe connected to the drying chamber, a circulation pump located at the end of the recovery pipe, an air inlet pipe located between the output end of the circulation pump and the drying chamber, and an auxiliary heating device located at the periphery of the air inlet pipe. The recycling pipe is equipped with several filter screens. The bottom of the side wall of the recycling pipe is equipped with a collection chamber located below the filter screens. The bottom of the recycling pipe is equipped with an electrostatic electrode. The collection chamber is equipped with an electrostatic generator that supplies power to the electrostatic electrode. The bottom of the recycling pipe is equipped with a through groove that communicates with the collection chamber and a cover plate that can cover the through groove. The collection chamber is equipped with a drive mechanism that drives the cover plate to move.

2. A briquette dryer with a waste heat recovery and utilization structure according to claim 1, characterized in that, The driving mechanism includes an electromagnet installed in the collection chamber, a magnet installed on the cover plate that can be magnetically attracted to the electromagnet, and a return spring installed between the magnet and the collection chamber.

3. A briquette dryer with a waste heat recovery and utilization structure according to claim 2, characterized in that, The drive mechanism also includes a guide rod disposed in the collection chamber and a sliding plate slidably connected to the guide rod. The magnet is disposed in the sliding plate, and the reset spring is sleeved on the guide rod and located between the sliding plate and the inner wall of the collection chamber.

4. A briquette dryer with a waste heat recovery and utilization structure according to claim 3, characterized in that, The guide rod is an arc-shaped pipe adapted to the recycling pipe.

5. A briquette dryer with a waste heat recovery and utilization structure according to claim 1, characterized in that, The cover plates are symmetrically arranged at the bottom of the recycling pipe, and each cover plate has an elastic sealing gasket on the side that is close to the other.

6. A briquette dryer with a waste heat recovery and utilization structure according to claim 1, characterized in that, The cover plate includes an inner plate located in the through groove and an outer plate connected to the inner plate and rotatably sealed to the outer wall of the recycling pipe.

7. A briquette dryer with a waste heat recovery and utilization structure according to claim 1, characterized in that, The auxiliary heating device includes an auxiliary heating box and an electric heating wire installed inside the auxiliary heating box and sleeved on the air inlet pipe.

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