Fluidized bed drying system

Abstract

The utility model relates to the field of fluidized bed drying equipment, and discloses a fluidized bed drying system. According to the device, a screwing-in ventilation channel is welded to the upper surface of the main body shell, the screwing-in ventilation channel comprises an air guide plate and an air guide groove, the air guide groove is formed in the outer surface of the screwing-in ventilation channel, a cloth bag filtering main body is movably inserted into the inner surface of the main body shell, and a guiding-out shell is welded to the upper surface of the cloth bag filtering main body; a second guiding-out shell is welded to the outer surface of the guiding-out shell, an upper cover plate is welded to the upper surface of the guiding-out shell, a pressurizing pipe obliquely rushes into an air guiding groove, an annular space is formed in a screwing-in ventilation channel, rotating air flow is generated, the air flow is guided out in the same direction through an air guiding plate, cyclone is generated, and then filtering is conducted through a cloth bag filtering body. The cloth bag filtering main body completes dust removal by internally winding and fixing a plurality of layers of cloth bags, nitride particles with large gravity are attached to the cloth bags close to the lower side to be gathered and then fall to the lower part, the nitride particles are guided out by the guide-out pipe according to conditions, and powdered nitrate and finished nitrate are mixed together to be sold as a product.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fluidized bed drying equipment, and particularly relates to a fluidized bed drying system. BACKGROUND

[0002] The nitrate-containing tail gas generated in the drying section of a nitrate production plant is originally washed by a wet dust collector to dissolve nitrate dust in the tail gas, and the clean gas is discharged at a high altitude. The nitrate-containing wastewater after washing is used multiple times and then returned to a mine wastewater pool. The dust removal efficiency of the system is low, and fine nitrate cannot be directly converted into products for sale.

[0003] A fluidized bed drying system is disclosed in the application with publication number CN215523931U, which comprises a fluidized bed dryer, an air inlet and an air outlet, a feed inlet and a discharge outlet; an air blower connected to the air inlet of the fluidized bed dryer; an induced draft fan connected to the air outlet of the fluidized bed dryer; and multiple frequency converters connected to the air blower and the induced draft fan. The fluidized bed drying system has simple processes and low production costs.

[0004] However, in the application, the nitrate-containing wastewater after washing is used multiple times and then returned to a mine wastewater pool, which is not conducive to the rational use of nitrate-containing tail gas. CONTENT OF THE UTILITY MODEL

[0005] The application aims to solve the problem of the rational use of nitrate-containing tail gas by providing a fluidized bed drying system.

[0006] The technical solution adopted by the application is as follows: a fluidized bed drying system comprises a main body shell, a rotary ventilation channel is welded to the upper surface of the main body shell, the rotary ventilation channel comprises a wind guide plate and a wind guide groove, the inner surface of the rotary ventilation channel is provided with the wind guide plate, the outer surface of the rotary ventilation channel is provided with the wind guide groove, a cloth bag filtering body is movably inserted into the inner surface of the main body shell, a lead-out shell is welded to the upper surface of the cloth bag filtering body, a second lead-out shell is welded to the outer surface of the lead-out shell, and an upper cover plate is welded to the upper surface of the lead-out shell.

[0007] By adopting the above technical solution, the pressurizing pipe is obliquely injected into the wind guide groove, an annular space is arranged inside the rotary ventilation channel, a rotating air flow is generated, the wind guide plate guides the air flow in the same direction to generate a cyclone, and the cloth bag filtering body filters the air flow by winding and fixing multiple layers of cloth bags inside, so that nitrate particles with large gravity fall to the lower side by adhering to the cloth bags and then being guided out by the lead-out pipe according to the situation, and the fine nitrate and the finished nitrate are mixed together as products for sale.

[0008] In a preferred embodiment, the outer surface of the lower end of the main body shell is welded with a support seat, and the outer surface of the guide shell is welded with a heat dissipation fin.

[0009] By adopting the above technical scheme, the device serves as a filtering component, and a conical design is adopted for the convenience of filtering quality. The support seat ensures the stable support of the device through external support. The heat dissipation fin is connected at the guide shell to facilitate the increase of the air contact area, thereby facilitating heat dissipation. Through the change of air pressure at the upper end and the reduction of temperature, the air activity is reduced, so that the nitrate-containing tail gas is better separated by gravity, thereby better facilitating screening.

[0010] In a preferred embodiment, the outer surface of the second guide shell is welded with a right-angle elbow, and the outer surface of the distal end of the right-angle elbow is provided with a negative pressure pump.

[0011] By adopting the above technical scheme, the right-angle elbow serves to avoid air impurities from blocking the second guide shell, thereby reducing the filtering progress, and the increase of internal air pressure may easily cause safety hazards. The negative pressure pump increases the air flow through internal machinery, and facilitates the discharge of the device.

[0012] In a preferred embodiment, the outer surface of the negative pressure pump is provided with an air inlet, and the outer surface of the negative pressure pump is provided with a motor.

[0013] By adopting the above technical scheme, the air inlet facilitates the suction of air flow into the negative pressure pump, and the motor is the main mechanical power source of the negative pressure pump.

[0014] In a preferred embodiment, the outer surface of the negative pressure pump is fixedly connected with a flow guide pipe, and the outer surface of the distal end of the flow guide pipe is fixedly connected with an exhaust tower.

[0015] By adopting the above technical scheme, the negative pressure pump sucks the tail gas through the right-angle elbow, discharges the tail gas through the flow guide pipe, and discharges the tail gas through the exhaust tower. The exhaust tower adopts a stacked filter to better perform environmental emission.

[0016] In a preferred embodiment, the outer surface of the output end of the main body shell is welded with a guide pipe, and the outer surface of the air guide groove is fixedly connected with a pressurizing pipe.

[0017] By adopting the above technical scheme, the pressurizing pipe obliquely rushes into the air guide groove to complete the entry of the nitrate-containing tail gas into the device. The guide pipe allows the filtered nitrate particles to drop to the lower side after being attached to the cloth bag and then to be discharged according to the situation. The powder nitrate and the finished nitrate are mixed together as products for sale.

[0018] In a preferred embodiment, the outer surface of the distal end of the pressurizing pipe is provided with a connecting conversion pipe, and the outer surface of the connecting conversion pipe is fixedly connected with a pressurizing pump.

[0019] By adopting the above technical scheme, the airflow is generated at the pressurizing pump, the connection conversion pipe provides a unified channel for the nitrous tail gas and the pressurizing pump, and the pressurizing pump is convenient to flush the airflow of the introduction pipe into the pressurizing pipe.

[0020] In a preferred embodiment, an introduction pipe is fixedly connected to the upper surface of the connection conversion pipe, and a pre-screening pipe is welded to the outer surface of the end of the introduction pipe away from the connection conversion pipe.

[0021] By adopting the above technical scheme, the nitrous tail gas generated in the drying section of the nitrate production workshop is flushed into the cleaning equipment, the introduction pipe is bent at the pre-screening pipe, and the internal baffle of the pre-screening pipe generates a bending channel, which reduces the impact of impurities on the pipeline and preheats the air.

[0022] In summary, due to the adoption of the above technical scheme, the beneficial effects of the present application are:

[0023] The nitrous tail gas generated in the drying section of the nitrate production workshop is originally washed by a wet dust collector to dissolve the nitrate dust in the tail gas, and the clean gas is discharged at a high altitude. The nitrous wastewater after washing is used multiple times and then returned to the mine. Now, the method is changed to "cyclone + high-efficiency bag dust collector". The nitrous tail gas generated in the drying section is collected by a primary cyclone dust collector + bag dust collector, and then mixed with the finished nitrate as a product. The clean gas after the bag dust collector is preheated by an air preheater to recover the heat of the tail gas, and then discharged. Through practice, it is found that the method is optimized:

[0024] 1. The emission reduction effect is obvious

[0025] The removal efficiency of the original wet dust collector is η = 89%, and the removal efficiency of the "cyclone + high-efficiency bag dust collector" waste gas purification system after transformation is η = 99.99%. The annual emission reduction of particulate matter is 166.5 tons.

[0026] 2. The economic benefit is obvious

[0027] 1500 tons of fine nitrate are recovered annually as products, and each ton is calculated at 300 yuan. The annual economic benefit is 450,000 yuan. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a front view of the device shape of the present application;

[0029] Figure 2 It is a back view of the device shape in the present application;

[0030] Figure 3 It is a disassembled top view of the filter structure of the device in the present application;

[0031] Figure 4It is a disassembled bottom view of the device filtering structure in the application.

[0032] Marked in the figure: 1, main body shell; 2, screw into ventilation channel; 3, air deflector; 4, air guide groove; 5, cloth bag filtering main body; 6, lead-out shell; 7, second lead-out shell; 8, upper cover plate; 9, support seat; 10, cooling fin; 11, right-angle elbow; 12, negative pressure pump; 13, air inlet; 14, motor; 15, flow guide pipe; 16, exhaust tower; 17, pressurizing pipe; 18, lead-out pipe; 19, connecting conversion pipe; 20, pressurizing pump; 21, lead-in pipe; 22, pre-screening pipe. DETAILED DESCRIPTION

[0033] To make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below in conjunction with the embodiments of the application. Obviously, the described embodiments are some embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the application. EMBODIMENT

[0034] Referring to Figures 1-4 , the fluidized bed drying system comprises a main body shell 1, a screw-in ventilation channel 2 is welded on the upper surface of the main body shell 1, the screw-in ventilation channel 2 comprises an air deflector 3 and an air guide groove 4, the air deflector 3 is arranged on the inner surface of the screw-in ventilation channel 2, and the air guide groove 4 is arranged on the outer surface of the screw-in ventilation channel 2; a cloth bag filtering main body 5 is movably inserted into the inner surface of the main body shell 1, a lead-out shell 6 is welded on the upper surface of the cloth bag filtering main body 5, a second lead-out shell 7 is welded on the outer surface of the lead-out shell 6, and an upper cover plate 8 is welded on the upper surface of the lead-out shell 6.

[0035] The pressurizing pipe 17 is obliquely punched into the air guide groove 4, an annular space is arranged inside the screw-in ventilation channel 2, a rotating air flow is generated, the air deflector 3 guides the air flow in the same direction, a cyclone is generated, and then the cloth bag filtering main body 5 filters the air flow; the cloth bag filtering main body 5 completes dust removal by means of multiple layers of cloth bags which are fixed by being wound inside; the nitrate particles with large gravity fall to the lower side by being attached to the cloth bags after being gathered, and then are led out by the lead-out pipe 18 according to the situation; the powder nitrate and the finished product nitrate are mixed together and sold as products.

[0036] Referring to Figures 1-4 , the support seat 9 is welded on the outer surface of the lower end of the main body shell 1, and the cooling fin 10 is welded on the outer surface of the lead-out shell 6.

[0037] The device is used as a filtering component, and a conical design is adopted for the convenience of filtering quality. The support base 9 is supported stably by external support, and the cooling fin 10 is connected at the outlet shell 6 to facilitate the increase of the air contact area and the heat dissipation. Through the change of air pressure at the upper end and the reduction of temperature, the air activity is reduced, so that the nitrate-containing tail gas is better separated by gravity and better screened.

[0038] Referring to Figures 1-2 , the second outlet shell 7 is welded with a straight elbow pipe 11 on the outer surface, and the straight elbow pipe 11 is provided with a negative pressure pump 12 on the outer surface away from the second outlet shell 7.

[0039] The straight elbow pipe 11 is used to bend downward first to avoid air impurities from blocking the second outlet shell 7 and reducing the filtering progress, and the increase of internal air pressure may cause safety hazards. The negative pressure pump 12 increases the air flow by internal machinery and facilitates the discharge of the device.

[0040] Referring to Figures 1-2 , the negative pressure pump 12 is provided with an air inlet 13 on the outer surface, and the negative pressure pump 12 is provided with a motor 14 on the outer surface.

[0041] The air inlet 13 facilitates the suction of air flow in the negative pressure pump 12, and the motor 14 is the main mechanical power source of the negative pressure pump 12.

[0042] Referring to Figures 1-2 , the negative pressure pump 12 is fixedly connected with a flow guide pipe 15 on the outer surface, and the flow guide pipe 15 is fixedly connected with an exhaust tower 16 on the outer surface away from the negative pressure pump 12.

[0043] The negative pressure pump 12 sucks the tail gas through the straight elbow pipe 11, and then discharges it through the flow guide pipe 15 and the exhaust tower 16. The exhaust tower 16 adopts a stacked filter for better environmental emission.

[0044] Referring to Figures 1-2 , the main body shell 1 is welded with a discharge pipe 18 on the outer surface of the output end, and the air guide groove 4 is fixedly connected with a pressurizing pipe 17 on the outer surface.

[0045] The pressurizing pipe 17 is obliquely injected into the air guide groove 4 to complete the entry of the nitrate-containing tail gas into the device. The discharge pipe 18 drops the filtered nitrate particles to the lower side after being attached to the cloth bag and then discharges them according to the situation. The powder nitrate and the finished product nitrate are mixed together as products for sale.

[0046] Referring to Figures 1-2 , the pressurizing pipe 17 is provided with a connecting conversion pipe 19 on the outer surface away from the air guide groove 4, and the connecting conversion pipe 19 is fixedly connected with a pressurizing pump 20 on the outer surface.

[0047] The air flow is generated at the pressurizing pump 20, the connecting conversion pipe 19 is connected to provide a unified channel for the nitrate-containing tail gas and the pressurizing pump 20, and the pressurizing pump 20 is convenient to flush the air flow of the introduction pipe 21 into the pressurizing pipe 17.

[0048] Referring to Figures 1-2 The upper surface of the connecting conversion pipe 19 is fixedly connected with the introduction pipe 21, and the outer surface of the end of the introduction pipe 21 away from the connecting conversion pipe 19 is welded with the pre-screening pipe 22.

[0049] The nitrate-containing tail gas generated in the drying section of the nitrate production plant is flushed into the cleaning equipment through the introduction pipe at the pre-screening pipe 22, the internal baffle of the pre-screening pipe 22 generates a bending channel, which reduces the impact of impurities on the pipeline and preheats at the same time, and the introduction pipe 21 is introduced into the high position through the connecting conversion pipe 19.

[0050] The implementation principle of the fluidized bed drying system embodiment of the application is as follows:

[0051] In use, the equipment generates a bending channel through the introduction pipe at the pre-screening pipe 22, the internal baffle of the pre-screening pipe 22 reduces the impact of impurities on the pipeline and preheats at the same time, the equipment generates air flow at the pressurizing pump 20 through the connecting conversion pipe 19, flushes the nitrate-containing tail gas generated in the drying section of the nitrate production plant into the cleaning equipment through the introduction pipe 21, and the pressurizing pipe 17 is obliquely flushed into the air guide groove 4, rotates into the annular space arranged in the ventilation channel 2, generates rotating air flow, is guided out by the air guide plate 3 in the same direction, generates cyclone, and is filtered by the bag filter main body 5. The bag filter main body 5 completes dust removal by winding and fixing multiple layers of bags inside, the nitrate particles with large gravity fall to the lower side by adhering to the bags after gathering, and are guided out by the guide pipe 18 according to the situation, and the powder nitrate and the finished nitrate are mixed together as products for sale.

[0052] The above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the application.

Claims

1. Fluidized bed drying system comprising a main housing (1), characterized in that: The upper surface of the main shell (1) is welded with a screw-in ventilation channel (2), the screw-in ventilation channel (2) includes a guide vane (3) and a guide slot (4), the inner surface of the screw-in ventilation channel (2) is provided with a guide vane (3), the outer surface of the screw-in ventilation channel (2) is provided with a guide slot (4), the inner surface of the main shell (1) is movably inserted with a cloth bag filter body (5), the upper surface of the cloth bag filter body (5) is welded with a lead-out shell (6), the outer surface of the lead-out shell (6) is welded with a second lead-out shell (7), the upper surface of the lead-out shell (6) is welded with an upper cover plate (8).

2. The fluid bed drying system of claim 1, wherein: The lower end of the outer surface of the main shell (1) is welded with a support seat (9), the outer surface of the lead-out shell (6) is welded with a cooling fin (10).

3. The fluid bed drying system of claim 1, wherein: The outer surface of the second lead-out shell (7) is welded with a right-angle elbow (11), the outer surface of the far end of the right-angle elbow (11) away from the second lead-out shell (7) is provided with a negative pressure pump (12).

4. The fluid bed drying system of claim 3, wherein: The outer surface of the negative pressure pump (12) is provided with an air inlet (13), and the outer surface of the negative pressure pump (12) is provided with a motor (14).

5. The fluid bed drying system of claim 3, wherein: The outer surface of the negative pressure pump (12) is fixedly connected with a flow guide pipe (15), and the outer surface of the far end of the flow guide pipe (15) away from the negative pressure pump (12) is fixedly connected with an exhaust tower (16).

6. The fluid bed drying system of claim 1, wherein: The outer surface of the output end of the main shell (1) is welded with a lead-out pipe (18), and the outer surface of the guide slot (4) is fixedly connected with a pressurizing pipe (17).

7. The fluid bed drying system of claim 6, wherein: The outer surface of the far end of the pressurizing pipe (17) away from the guide slot (4) is provided with a connecting conversion pipe (19), and the outer surface of the connecting conversion pipe (19) is fixedly connected with a pressurizing pump (20).

8. The fluid bed drying system of claim 7, wherein: The upper surface of the connecting conversion pipe (19) is fixedly connected with an introduction pipe (21), and the outer surface of the far end of the introduction pipe (21) away from the connecting conversion pipe (19) is welded with a pre-screening pipe (22).

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