Drying device for vacuum conveying of grid slag of fine grid

Abstract

The utility model discloses a drying device for fine screen slag vacuum conveying. The drying device comprises a fixing frame and a drying bin arranged on the fixing frame. The drying bin is of a fluidized bed structure design, a feeding port and an air outlet are formed in the top of the drying bin, a discharging port connected with a slag suction pipeline and a plurality of hot air inlets connected with a heat source device are formed in the bottom of the drying bin, the feeding port and the discharging port are arranged on the drying bin in a diagonal mode, and the air outlet is arranged close to one side of the discharging port. The bottom blowing hot air is used for reducing the moisture content of the fine screen slag, the blocking problem of the screen slag conveying pipeline is effectively relieved, and it is guaranteed that the fine screen slag can be stably conveyed.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, and more specifically to a drying device for vacuum conveying of fine grid slag. Background Art

[0002] The screen is the first treatment process that sewage goes through after entering the sewage treatment plant. Usually, the screens are divided into three categories according to the net spacing of the bars: coarse screens (50-100mm), medium screens (16-40mm), and fine screens (3-10mm); the function of the fine screen is to control the size of suspended pollutants in the water that eventually enters the subsequent treatment unit to prevent them from accumulating in the subsequent treatment unit, thereby causing damage to related equipment or affecting the effluent water quality; the screen residue obtained at the fine screen is generally squeezed by a press and then manually pushed into a trash can and transported out. Since the particle size of the fine screen residue particles is relatively small, transporting the fine screen residue in this way will cause a poor environment in the treatment workshop and is time-consuming and labor-intensive.

[0003] Therefore, in order to ensure the workshop environment for fine screen slag treatment and solve the time-consuming and labor-intensive problem of manual transportation, the sewage plant pretreatment workshop was deeply analyzed and studied, and finally the original open-ground fine screen pretreatment area was transferred to the underground sealed space, and the vacuum adsorption principle was used to transport the screen slag and sedimentation and other garbage from various places to the ground layer through pipeline sealing, and the above-ground part can be transformed into a garden-style landscape, and the transformation of the sewage plant pretreatment ultra-clean space was completed on this basis. However, in the process of using pipelines to transport fine screen slag, the transportation pipeline is prone to blockage. After on-site sampling and analysis, it was found that the main reason is that the fine screen slag has a high moisture content and contains grease substances, which will cause the fine screen slag to easily adhere to the inner wall of the transportation pipeline, and the more it adheres, the more it will adhere, thus causing the entire transportation pipeline to be blocked. Utility Model Content

[0004] In view of the above-mentioned defects existing in the prior art, the purpose of the utility model is to provide a drying device for vacuum conveying of fine grid screen residue. During the vacuum conveying process of the fine grid screen residue, bottom blowing hot air is used to reduce the moisture content of the fine grid screen residue, thereby effectively alleviating the blockage problem of the screen residue conveying pipeline and ensuring that the fine grid screen residue can be conveyed stably.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a drying device for vacuum conveying of fine grid slag, comprising a fixing frame and a drying bin arranged on the fixing frame; the drying bin adopts a fluidized bed structure design, a feed port and an air outlet are arranged on the top of the drying bin, a discharge port connected to a slag suction pipe and a plurality of hot air inlets connected to a heat source device are arranged on the bottom, the feed port and the discharge port are arranged diagonally on the drying bin, and the air outlet is arranged close to one side of the discharge port.

[0007] Preferably, the drying chamber is a rectangular chamber body.

[0008] Preferably, a barbed mesh plate pusher controlled by a cylinder is provided in the drying chamber.

[0009] Preferably, a deodorizing air duct connected to a deodorizing system is also provided on the top of the drying bin.

[0010] Preferably, the hot air inlet at the bottom of the drying chamber is connected to the heat source device through a high-temperature hose.

[0011] Preferably, the high-temperature hose is fixed on the outside with a stainless steel clamp.

[0012] Preferably, the air outlet of the drying chamber is connected to the heat source device via a dust removal device, and the heat source device is provided with a hot air blower connected to the dust removal device.

[0013] Preferably, the dust removal device includes a bag dust collector connected to the air outlet and a pulse dust collector connected to the bag dust collector, and the pulse dust collector is connected to the hot air blower on the heat source device.

[0014] Preferably, the drying chamber is also provided with a visual mirror.

[0015] Preferably, the drying bin is also provided with a level meter.

[0016] The utility model provides a drying device for vacuum conveying of fine grid slag, which has the following advantages:

[0017] 1. The drying device for vacuum conveying of fine grid screens of the utility model adopts a fluidized bed structure. During the vacuum conveying process of fine grid screens, hot air drying is used to reduce the moisture content of the fine grid screens, effectively alleviating the problem of clogging of the screens conveying pipeline, and can also minimize the space of the drying device to ensure stable operation of the equipment;

[0018] 2. The utility model of the drying device for vacuum conveying of fine grid slag transmits hot air from the bottom of the drying device through the heat source device, thereby reducing the moisture content of the fine grid slag. At the same time, the hot air passes through the dust removal device (bag dust collector for solid-gas separation, pulse dust collector for further dust removal) to remove the solid phase, and then is pushed to the heat source device by the hot air blower, so as to achieve the purpose of recycling and saving energy consumption;

[0019] 3. The utility model's vacuum conveying drying device for fine grid slag is provided with a deodorizing air duct to ensure that harmful gases will not overflow and spread;

[0020] 4. The drying device for vacuum conveying of fine grid slag of the utility model can greatly improve the stability of vacuum conveying of fine grid slag, ensure low moisture content of materials, and at the same time recover hot air through dust removal device and reheat to achieve the effect of waste heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a drying device for vacuum conveying of fine grid slag of the utility model;

[0022] Figure 2 It is a schematic diagram of the connection between the drying device for vacuum conveying of fine grid slag of the utility model, the heat source device, and the dust removal device;

[0023] Figure 3 It is a schematic diagram of the connection between the drying device and the dust removal device for vacuum conveying of fine grid slag of the utility model;

[0024] Figure 4 It is a schematic diagram of the hot air recycling of the drying device for vacuum conveying of fine grid slag of the utility model;

[0025] In the figure, 10, drying device; 101, fixing frame; 102, drying chamber; 103, feed inlet; 104, air outlet; 105, discharge port; 106, deodorizing air duct; 107, hot air inlet; 108, mesh plate pusher; 109, visual mirror; 21, bag filter; 22, pulse filter; 30, heat source device; 31, hot air blower; 32, high temperature hose. DETAILED DESCRIPTION

[0026] In order to better understand the above technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0027] During the operation of the sewage treatment plant, in order to ensure the workshop environment for fine screen slag treatment and solve the problem of time-consuming and labor-intensive manual transportation, the sewage treatment plant pretreatment workshop was deeply analyzed and studied. Finally, the original open ground fine screen pretreatment area was transferred to an underground sealed space, and the vacuum adsorption principle was used to transport the slag, grit and other garbage from various places to the ground layer through a closed pipeline for transportation. At the same time, various treatment equipment was installed in the underground sealed space, and the above-ground part could be transformed into a garden-style landscape, thereby reducing environmental pollution during sewage treatment, effectively improving the plant environment of the sewage treatment plant, and improving the air quality of the plant. On this basis, the transformation of the sewage treatment plant pretreatment ultra-clean space was completed.

[0028] The utility model is one of the important technologies in the reconstruction scheme of the ultra-clean space of the sewage treatment plant pretreatment, which utilizes hot air drying to reduce the moisture content of the fine grid screen residue, thereby alleviating the blockage problem of the fine grid screen residue conveying pipeline, and greatly improving the stability of the vacuum conveying of the fine grid screen residue.

[0029] The utility model provides a drying device for vacuum conveying of fine grid screen residues, which can improve the operating stability of the fine grid to a great extent while improving the operating stability of the daily production, thereby ensuring that the moisture content of the fine grid screen residues is low.

[0030] Combination Figure 1 As shown, the utility model provides a drying device 10 for vacuum conveying of fine grid slag, comprising a fixing frame 101 and a drying chamber 102 arranged on the fixing frame 101; the drying chamber 102 adopts a fluidized bed structure design, the top of the drying chamber 102 is provided with a feed port 103 and an air outlet 104, the bottom is provided with an outlet 105 connected to a slag suction pipe and a plurality of hot air inlets 107 connected to a heat source device, the feed port 103 and the outlet 105 are arranged diagonally on the drying chamber 102, and the air outlet 104 is arranged near one side of the outlet 105. When the fine grid slag falls from the feed port 103 to the drying chamber 102, it is repeatedly washed by high-pressure hot air (temperature of about 130°C) fed from the bottom, and after a specified heating time, the dried fine grid slag falls into the slag suction pipe through the outlet 105 at the bottom of the drying chamber 102 and continues to be conveyed to the subsequent process.

[0031] Combination Figure 1 As shown, the drying bin 102 adopts a fluidized bed structure design and is a rectangular bin body, which can minimize the space of the drying equipment. A cylinder-controlled mesh plate pusher 108 with barbs is provided in the drying bin 102. The mesh plate pusher 108 is used to push the fine grid slag falling from the feed inlet 103 to a position above the hot air inlet to prevent the fine grid slag from accumulating below the feed inlet 103.

[0032] The drying device 10 for vacuum conveying of fine screen slag is arranged after the second squeezing of the fine screen slag, which can reduce the moisture content of the fine screen slag to about 45-50% and remove the grease in it. Since the heating of the fine screen slag will inevitably cause further release of toxic and harmful gases, a deodorizing air duct 106 connected to the deodorizing system is also arranged on the top of the drying chamber 102 (see Figure 1 As shown), it ensures that toxic and harmful gases will not overflow and spread.

[0033] Combination Figure 2 As shown, the hot air inlet 107 at the bottom of the drying bin 102 is connected to the heat source device 30 through the high-temperature hose 32. The heat source device 30 sends high-pressure hot air into the drying bin 102 through the high-temperature hose 32 from the hot air inlet 107 at the bottom to dry the fine grid residue; the outside of the high-temperature hose 32 is fixed with a stainless steel clamp.

[0034] Combination Figure 2 , Figure 3As shown, the air outlet 104 of the drying bin 102 is connected to the heat source device 30 through the dust removal device, and the heat source device 30 is provided with a hot air blower 31 connected to the dust removal device. The hot air blower 31 is used to push the hot air from the dust removal device to the heat source device 30 for heating, and the heating temperature can be about 130°C, which can be adjusted according to the site; the heated high-pressure hot air then enters the drying device 10 through the hot air inlet 107 at the bottom of the drying bin 102 to participate in the drying process of the fine grid slag.

[0035] Combination Figure 3 As shown, the dust removal device includes a bag dust collector 21 connected to the air outlet 104 and a pulse dust collector 22 connected to the bag dust collector 21. The pulse dust collector 22 is connected to the hot air blower 31 on the heat source device 30. The air outlet at the top of the bag dust collector 21 is connected to the pulse dust collector 22 through a pipeline, and the solid phase separated by the bag dust collector 21 flows back to the drying chamber through its side pipeline. Figure 4 As shown, the hot air coming out of the drying device 10 passes through the bag dust collector 21 for solid-gas separation, then enters the pulse dust collector 22 for further dust removal, and is then pushed to the heat source device 30 by the hot air blower 31 for heating, and then is sent to the drying device 10 for use, thereby achieving the purpose of waste heat recovery and hot air recycling to save energy.

[0036] Combination Figure 2 As shown, the pipelines between the heat source device 30 and the drying device 10 and the dust removal device can all use high-temperature hoses 32, and the high-temperature hoses 32 are fixed with stainless steel clamps.

[0037] Combination Figure 1 As shown, the drying bin 102 is also provided with a visual mirror 109, which is convenient for the staff to observe the situation in the drying bin 102. In a specific embodiment, the drying bin 102 is also provided with a level meter, which is convenient for monitoring the material level information in the drying bin 102.

[0038] The utility model discloses a drying device for vacuum conveying of fine grid screen residue, which adopts a bottom air supply mode, and recovers the hot air of the drying device through a dust removal device and removes the dust, and then returns it to a heat source device, thereby achieving the purpose of recycling and saving energy consumption while reducing the moisture content of the fine grid screen residue.

[0039] The renovation of the pre-treatment ultra-clean space of a sewage plant is a major engineering project in Shanghai and is also the first application in the pre-treatment area of ​​a sewage plant. The utility model is one of the important technologies in the renovation plan of the pre-treatment ultra-clean space of a sewage plant, and improves the renovation plan of the pre-treatment ultra-clean space of a sewage plant. In the process of vacuum conveying of fine grid screen residues, bottom blowing hot air is used to reduce the moisture content of the fine grid screen residues, which effectively alleviates the problem of blockage of the screen residue conveying pipeline and ensures that the fine grid screen residues can be transported stably.

[0040] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A drying device for vacuum conveying of fine grid slag, characterized in that: It includes a fixed frame and a drying bin arranged on the fixed frame; the drying bin adopts a fluidized bed structure design, a feed port and an air outlet are arranged on the top of the drying bin, a discharge port connected to a slag suction pipe and a plurality of hot air inlets connected to a heat source device are arranged on the bottom, the feed port and the discharge port are arranged diagonally on the drying bin, and the air outlet is arranged close to one side of the discharge port.

2. The drying device for vacuum conveying of fine grid residue according to claim 1, characterized in that: The drying chamber is a rectangular chamber body.

3. The drying device for vacuum conveying of fine grid slag according to claim 1, characterized in that: A screen pusher with barbs controlled by a cylinder is arranged in the drying bin.

4. The drying device for vacuum conveying of fine grid slag according to claim 1, characterized in that: A deodorizing air duct connected to the deodorizing system is also provided on the top of the drying bin.

5. The drying device for vacuum conveying of fine grid screenings according to claim 1, characterized in that: The hot air inlet at the bottom of the drying bin is connected to the heat source device through a high-temperature hose.

6. The drying device for vacuum conveying of fine grid slag according to claim 5, characterized in that: The high temperature hose is fixed on the outside with a stainless steel clamp.

7. The drying device for vacuum conveying of fine grid residue according to claim 5, characterized in that: The air outlet of the drying bin is connected to the heat source device through a dust removal device, and the heat source device is provided with a hot air blower connected to the dust removal device.

8. The drying device for vacuum conveying of fine grid slag according to claim 7, characterized in that: The dust removal device comprises a bag dust collector connected to the air outlet and a pulse dust collector connected to the bag dust collector, and the pulse dust collector is connected to the hot air blower on the heat source device.

9. The drying device for vacuum conveying of fine grid slag according to claim 1, characterized in that: The drying chamber is also provided with a visual mirror.

10. The drying device for vacuum conveying of fine grid screenings according to claim 1, characterized in that: The drying bin is also provided with a level meter.

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