Activated carbon dustless recovery system

Abstract

The utility model discloses an active carbon dustless recovery system belongs to industrial dust management and solid waste resource recovery technical field, include: filter, filter is used for filtering the active carbon in liquid material, buffer carbon case, buffer carbon case is located below filter, and buffer carbon case is connected with the carbon outlet of filter, and water scrubbing tower, the air inlet of water scrubbing tower is connected with buffer carbon case, and the pressure in water scrubbing tower is lower than the pressure in buffer carbon case, is provided with spray set on water scrubbing tower, and spray set is used for spraying washing the airflow from buffer carbon case to make the dust carried in airflow dissolve in water and form carbon liquid, installs carbon liquid pump on the carbon liquid backflow pipeline of the liquid outlet of intercommunication water scrubbing tower and the back material mouth of filter, and carbon liquid pump is used for pumping carbon liquid into filter. Filter, buffer carbon case and water scrubbing tower form closed loop structure, realize dust trapping, solve the problem of dust pollution environment, harm personnel health, realize the closed loop management of material, and eliminate waste.

Description

Technical Field

[0001] This utility model belongs to the field of industrial dust control and solid waste resource recycling technology, and relates to an activated carbon dust-free recycling system. Background Technology

[0002] In the chemical, food, and pharmaceutical industries, filters are widely used to filter activated carbon from liquid materials. Filter types include rod filters, horizontal vane filters, and other forms. Taking a rod filter as an example, the filtration process is as follows: Liquid material containing activated carbon is pumped into the filter through the carbon inlet at the bottom. After filtration, the wet activated carbon is trapped on the outside of the filter rods, while the clear liquid enters the filter rod cavity and exits through the clear liquid outlet at the top of the filter. Steam is then introduced to purge the wet activated carbon, leaving it semi-dry. The carbon discharge valve at the bottom of the filter is opened to unload the semi-dry activated carbon, which is then discharged into a container (such as a ton bag) below. After unloading, the next batch of liquid material containing activated carbon enters the filter, repeating the above filtration process.

[0003] The dust generated during the unloading process can pollute the environment and endanger human health. If the dust concentration is too high, there is a risk of explosion. In addition, some light activated carbon will be dispersed by the airflow, resulting in material waste.

[0004] Current technologies lack comprehensive solutions that can effectively address both dust control and material recovery simultaneously. Utility Model Content

[0005] To at least address the problem of environmental pollution and health hazards caused by dust generated during carbon unloading in existing filters, this utility model provides the following technical solution: a dust-free activated carbon recovery system, comprising:

[0006] A filter for filtering activated carbon from liquid materials;

[0007] A buffer carbon box, located below the filter, is connected to the carbon discharge port of the filter; and

[0008] A water washing tower is provided, with its air inlet connected to the buffer carbon box. The pressure inside the water washing tower is lower than that inside the buffer carbon box. A spraying device is installed on the water washing tower to spray and wash the airflow from the buffer carbon box so that the dust carried in the airflow dissolves in the water to form carbon liquid. A carbon liquid pump is installed on the carbon liquid return pipeline connecting the outlet of the water washing tower and the return port of the filter. The carbon liquid pump is used to pump the carbon liquid into the filter.

[0009] Optionally, in the above-mentioned activated carbon dust-free recovery system, the air inlet of the water washing tower is located at the bottom of the water washing tower or on one side of the water washing tower.

[0010] The nozzle of the spray device is located above the air inlet.

[0011] Optionally, in the above-mentioned activated carbon dust-free recovery system, the activated carbon dust-free recovery system further includes: a dust collector and a fan;

[0012] The air inlet of the dust collector is connected to the air outlet of the water washing tower. The dust collector is used to collect dust that has not been captured by the spraying device. The discharge outlet of the dust collector is connected to the buffer carbon box.

[0013] The air inlet of the fan is connected to the air outlet of the dust collector.

[0014] Optionally, in the above-mentioned activated carbon dust-free recovery system, a dust collector switch valve is installed at the air inlet of the dust collector;

[0015] A nitrogen pipeline is used to introduce nitrogen into the pipeline connecting the dust collector switch valve and the outlet of the water washing tower to create positive pressure between the buffer carbon box and the water washing tower.

[0016] Optionally, in the above-mentioned activated carbon dust-free recovery system, the positive pressure ranges from 300 to 2500 Pa.

[0017] Optionally, in the above-mentioned activated carbon dust-free recovery system, the buffer carbon box has a first connection end, a second connection end, a third connection end, and a fourth connection end;

[0018] The first connection end and the second connection end are vertically opposite each other, and the first connection end is connected to the carbon discharge port of the filter;

[0019] The second connection end is used to connect to a container located below the buffer carbon box;

[0020] The third connection end is connected to the air inlet of the water washing tower;

[0021] The fourth connection end is connected to the discharge port of the dust collector.

[0022] Optionally, in the above-described activated carbon dust-free recovery system, a carbon discharge valve is installed between the buffer carbon box and the filter; and

[0023] A char discharge valve is installed between the buffer char box and the container.

[0024] Optionally, in the above-mentioned activated carbon dust-free recovery system, the buffer carbon box is funnel-shaped, and a vibrating air hammer is provided at the bottom of the buffer carbon box.

[0025] Optionally, in the above-described activated carbon dust-free recovery system, the third connection end is located at the top of the buffer carbon box.

[0026] Optionally, in the above-mentioned activated carbon dust-free recovery system, a dust detector is installed in the buffer carbon box and / or the water washing tower.

[0027] The beneficial effects of the technical solution provided by this utility model embodiment are:

[0028] This application establishes a closed-loop structure by setting up a filter, a buffer carbon box, and a water washing tower. During the process of unloading carbon from the filter into the buffer carbon box, the airflow carrying dust is drawn into the water washing tower. The spray device in the water washing tower dissolves the dust carried in the airflow into the water to form carbon liquid. The carbon liquid is then pumped into the filter for filtration treatment, and the activated carbon is recovered. This achieves dust capture, solves the problem of dust pollution and harm to human health, realizes closed-loop management of materials, and eliminates waste. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an activated carbon dust-free recovery system provided in an embodiment of the present invention;

[0030] In the diagram: 1. Filter; 2. Carbon discharge valve; 3. Buffer carbon box; 4. Spraying device; 5. Dust collector; 6. Fan; 7. Vibrating hammer; 8. Ton bag; 9. Carbon discharge valve; 10. Carbon liquid pump; 11. Nitrogen pipeline; 12. Nitrogen valve; 13. Dust collector switch valve; 14. Carbon liquid return pipeline; 15. Water washing tower; 16. Carbon liquid inlet; 17. Clear liquid outlet; 18. First pipeline; 19. Second pipeline. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0032] In the description of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," and "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. The terms "connected," "linked," and "set up" used in this utility model should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a direct connection or an indirect connection through intermediate components; a wired connection, a radio connection, or a wireless communication signal connection. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0033] Please see Figure 1 The present invention provides the following technical solution: an activated carbon dust-free recovery system, the activated carbon dust-free recovery system comprising: a filter 1, a buffer carbon box 3 and a water washing tower 15.

[0034] The filter 1 has a charcoal inlet 16 at its lower part, a clear liquid outlet 17 at its upper part, and a charcoal discharge outlet at its bottom. Additionally, the filter 1 has a return outlet. The filter 1 can be any existing filter, such as a rod-type, horizontal blade-type, or other type of filter. The filter 1 in this application is used to filter activated carbon from liquid materials. Taking a rod-type filter as an example, during use, liquid material containing activated carbon is added to the filter 1 through the charcoal inlet 16. After filtration, the wet activated carbon is trapped outside the filter rods, while the clear liquid enters the cavity of the filter rods and exits through the clear liquid outlet 17 at the top of the filter 1. Steam is introduced to blow away the trapped wet activated carbon. After blowing, the activated carbon is in a semi-dry state, and the charcoal discharge valve 2 at the bottom of the filter 1 can be opened to unload the activated carbon. After unloading, the next batch of liquid material containing activated carbon will enter the filter 1 to repeat the above filtration process.

[0035] The buffer carbon box 3 has a cavity and is located below the filter 1. The buffer carbon box 3 is connected to the discharge port of the filter 1. When unloading carbon, the carbon discharge valve 2 at the bottom of the filter 1 is opened, and the semi-dry activated carbon after blowing falls into the buffer carbon box 3 through the carbon discharge port at the bottom of the filter 1.

[0036] The air inlet of the water washing tower 15 is connected to the buffer carbon box 3 through the first pipe 18. Simultaneously, the pressure inside the water washing tower 15 is lower than the pressure inside the buffer carbon box 3, such as a pressure difference of -300 to -2500 Pa. Thus, the activated carbon, during its descent, forms an airflow carrying dust, which is then drawn into the water washing tower 15. It is worth noting that the dust is lightweight activated carbon, which can float under the influence of the airflow; the heavier activated carbon falls directly to the bottom of the buffer carbon box 3 under gravity. A spray device 4 is installed on the water washing tower 15. The spray device 4 is used to spray and wash the dust from the buffer carbon box 3, aiming to capture the dust and dissolve it in water to form molten carbon. The outlet of the water washing tower 15 is connected to the return port of the filter 1 through a molten carbon return pipeline 14. A molten carbon pump 10 is installed on the molten carbon return pipeline 14. The molten carbon pump 10 pumps the molten carbon from the bottom of the water washing tower 15 into the filter 1, where the activated carbon is filtered out.

[0037] The filter 1, buffer carbon box 3, and water washing tower 15 form a closed-loop structure. During the carbon unloading process of filter 1, an airflow carrying dust is generated in the buffer carbon box 3. The airflow is drawn into the water washing tower 15, where a spray device 4 sprays and washes the airflow. The dust in the airflow is captured and settles at the bottom of the water washing tower 15 in the form of slurry. The slurry is then pumped into filter 1 by the carbon liquid pump 10. The slurry is filtered by filter 1 to recover activated carbon. By capturing the dust generated during the carbon unloading process of filter 1, this application solves the problem of dust pollution and harm to human health, achieves closed-loop management of materials, and eliminates waste. The unique carbon liquid reflux design of this application transforms the "pollutants" of waste gas in traditional treatment into recyclable "resources," achieving a unity of environmental protection and economic benefits.

[0038] As a preferred embodiment of the above embodiments, in this embodiment, the air inlet of the water washing tower 15 is located at the bottom of the water washing tower 15 or on one side of the water washing tower 15. The nozzle of the spray device 4 is located above the air inlet of the water washing tower 15, so that the water sprayed from the nozzle flows counter-currently with the airflow from the buffer carbon box 3, thereby dissolving most of the dust carried in the airflow into the water.

[0039] See Figure 1As shown, the activated carbon dust-free recovery system of this application also includes a dust collector 5 and a fan 6. Specifically, the air inlet of the dust collector 5 is connected to the air outlet of the water washing tower 15. The dust collector 5 is used to collect dust that has not been captured by the spray device 4, or in other words, the dust collector 5 is used to purify the exhaust gas. The discharge port of the dust collector 5 is connected to the buffer carbon box 3 through a second pipe 19. Preferably, the air outlet of the water washing tower 15 and the air inlet of the water washing tower 15 are staggered vertically, thereby extending the residence time of the airflow carrying dust in the water washing tower 15. The air inlet of the fan 6 is connected to the air outlet of the dust collector 5. During operation, after being washed by the spray device 4, most of the dust in the airflow is captured and forms carbon liquid, which settles at the bottom of the water washing tower 15. The remaining trace amounts of wet dust enter the dust collector 5 under the power of the fan 6. The dust collector 5 further captures these trace amounts of wet dust and sends them back to the buffer carbon box 3 along the second pipe 19. The clean gas treated by the dust collector 5 is then discharged to the outside by the fan 6, achieving clean exhaust gas emission. This application achieves extremely high dust removal efficiency through multi-stage purification of "water washing tower 15 + dust collector 5".

[0040] Further, see Figure 1 As shown, a dust collector switch valve 13 is installed at the air inlet of the dust collector 5. Nitrogen gas is introduced through a nitrogen pipeline 11, which connects the dust collector switch valve 13 to the air outlet of the water washing tower 15. A nitrogen valve 12 is installed on the nitrogen pipeline 11. When the dust collector switch valve 13 is closed, an appropriate amount of nitrogen is introduced through the nitrogen pipeline 11 to create a positive pressure between the buffer carbon box 3 and the water washing tower 15. Preferably, the positive pressure ranges from 300 to 2500 Pa. This means that an appropriate amount of nitrogen can be effectively restricted and used to establish a slight positive pressure between the buffer carbon box 3 and the water washing tower 15. When the dust collector switch valve 13 is open, it provides inert protection for the entire gas treatment path. Simply put, nitrogen inertizes key areas where dust accumulates, such as the upper part of the buffer carbon box 3 and the water washing tower 15, and combined with the slight positive pressure operation, reduces the dust concentration in these key areas, fundamentally eliminating the risk of dust explosion. It is worth mentioning that the precise layout of the dust collector switch valve 13 enhances the system's segmented control and safety assurance capabilities.

[0041] As an embodiment of the specific structure of the buffer carbon box 3, in this embodiment, the buffer carbon box 3 has a first connecting end, a second connecting end, a third connecting end, and a fourth connecting end. The first and second connecting ends of the buffer carbon box 3 are vertically opposite each other, meaning these two ports are on the same straight line. The first connecting end of the buffer carbon box 3 is connected to the carbon discharge port at the bottom of the filter 1, so that during carbon unloading, the activated carbon discharged from the carbon discharge port of the filter 1 falls into the buffer carbon box 3 through the first connecting end. The second connecting end of the buffer carbon box 3, also called the carbon discharge port, is used to connect to a container located below the buffer carbon box 3, such as a ton bag 8, so that the activated carbon in the buffer carbon box 3 can fall into the ton bag 8 through the second connecting end. The third connecting end of the buffer carbon box 3 is connected to the air inlet of the water washing tower 15, so that during the carbon unloading process, an airflow carrying dust is formed, and the airflow is drawn into the water washing tower 15 through the air inlet of the first pipe 18. Preferably, the third connection end of the buffer carbon box 3 is located at the top of the buffer carbon box 3. In this way, when a slight positive pressure is established between the buffer carbon box 3 and the water washing tower 15 through an appropriate amount of nitrogen, the nitrogen quickly reduces the dust concentration in the dust accumulation area of ​​the buffer carbon box 3, eliminating the risk of dust combustion and explosion. The fourth connection end of the buffer carbon box 3 is connected to the discharge port of the dust collector 5 through the second pipe 19, so that the residual trace amount of wet dust collected by the dust collector 5 can be recovered into the buffer carbon box 3.

[0042] It is worth mentioning that in actual use, the micro-spray device 4 can not only suppress residual dust, but also ensure that all the light activated carbon is transferred into the ton bag 8 or returned to the filter 1 with the carbon liquid, without any form of activated carbon waste.

[0043] To control the entry and exit of activated carbon into and out of the buffer carbon box 3, in this embodiment, a carbon discharge valve 2 is installed between the buffer carbon box 3 and the filter 1. Specifically, the carbon discharge valve 2 is located between the carbon discharge port of the filter 1 and the first connection end of the buffer carbon box 3. Before unloading, the carbon discharge valve 2 is opened. During unloading, the activated carbon discharged from the carbon discharge port of the filter 1 falls into the buffer carbon box 3 through the first connection end. Closing the carbon discharge valve 2 completes the unloading process. A carbon discharge port valve 9 is installed between the buffer carbon box 3 and the container (such as a ton bag 8). Specifically, the carbon discharge port valve 9 is located between the ton bag 8 and the second connection end of the buffer carbon box 3. Opening the carbon discharge port valve 9 allows the slight positive pressure inside the buffer carbon box 3 to discharge the activated carbon into the ton bag 8. Furthermore, it is worth mentioning that multiple valves in this application can be solenoid valves. This application achieves automatic control through multiple valves and the carbon liquid pump 10, resulting in continuous and reliable system operation.

[0044] As a preferred embodiment of the above embodiments, in this embodiment, the buffer carbon box 3 is funnel-shaped, and a vibrating hammer 7 is provided at the bottom of the buffer carbon box 3. Activating the vibrating hammer 7 can ensure smooth feeding of activated carbon. The number of vibrating hammers 7 can be flexibly set according to actual needs.

[0045] To continuously monitor dust concentration, dust detectors are installed in key areas of the buffer carbon box 3 and / or water washing tower 15. Specific safe concentration values ​​can be set according to actual site conditions. Once this safe concentration value is reached, nitrogen is promptly added to reduce the dust concentration.

[0046] The operating method of this utility model, namely the two-step carbon removal and recovery method, is as follows:

[0047] Step 1: Dust-free emission and carbon liquid collection

[0048] 1) Confirm that the char discharge valve 9 of the buffer char box 3 is in the closed state.

[0049] 2) Open the nitrogen valve 12 to purge nitrogen into the pipeline between the water washing tower 15 and the dust collector switch valve 13 to replace the air.

[0050] 3) Open the carbon discharge valve 2, the dust collector switch valve 13, the fan 6, and the spray device 4 at the top of the water washing tower 15 respectively.

[0051] 4) The activated carbon discharged from filter 1 is discharged into the buffer carbon box 3 under gravity. During the fall of the activated carbon, the airflow carrying dust is drawn into the water washing tower 15. After being sprayed and washed by the spray device 4, most of the dust is captured and forms carbon liquid that settles at the bottom of the tower. The remaining trace amount of wet dust is then captured by the dust collector 5, achieving clean emission of the exhaust gas.

[0052] 5) After all the activated carbon has been discharged into the buffer carbon box 3, close the carbon discharge valve 2 and the dust collector switch valve 13.

[0053] Step 2: Dry Charcoal Conveying and Charcoal Liquid Recovery

[0054] 1) Keep the nitrogen valve 12 open, and nitrogen will create a slightly positive pressure environment for the buffer carbon box 3 and the water washing tower 15.

[0055] 2) Open the carbon discharge valve 9 and start the vibrating hammer 7.

[0056] 3) The spray device 4 is always kept slightly open to further wet any light dust that may be raised, ensuring that it enters the ton bag 8 with the main material, or is carried back to the water washing tower 15 by the airflow.

[0057] 4) The slight positive pressure in the buffer carbon box 3 smoothly "presses" the dried activated carbon into the ton bag 8.

[0058] 5) At the same time or after the carbon discharge is completed, start the carbon liquid pump 10 to transport all the carbon liquid accumulated at the bottom of the water washing tower 15 back to the filter 1 through the carbon liquid return pipeline 14, so as to complete the complete recovery of activated carbon.

[0059] 6) After all the activated carbon has been transferred and the char liquid has been recovered, shut off the vibrating hammer 7, the spray device 4, the nitrogen valve 12, the char discharge valve 9, and the char liquid pump 10 in sequence.

[0060] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A dust-free activated carbon recovery system, characterized in that, The activated carbon dust-free recovery system includes: A filter for filtering activated carbon from liquid materials; A buffer carbon box, located below the filter, is connected to the carbon discharge port of the filter; and A water washing tower is provided, with its air inlet connected to the buffer carbon box. The pressure inside the water washing tower is lower than that inside the buffer carbon box. A spraying device is installed on the water washing tower to spray and wash the airflow from the buffer carbon box so that the dust carried in the airflow dissolves in the water to form carbon liquid. A carbon liquid pump is installed on the carbon liquid return pipeline connecting the outlet of the water washing tower and the return port of the filter. The carbon liquid pump is used to pump the carbon liquid into the filter.

2. The activated carbon dust-free recovery system according to claim 1, characterized in that, The air inlet of the water washing tower is located at the bottom of the water washing tower or on one side of the water washing tower. The nozzle of the spray device is located above the air inlet.

3. The activated carbon dust-free recovery system according to claim 1, characterized in that, The activated carbon dust-free recovery system also includes: a dust collector and a fan; The air inlet of the dust collector is connected to the air outlet of the water washing tower. The dust collector is used to collect dust that has not been captured by the spraying device. The discharge outlet of the dust collector is connected to the buffer carbon box. The air inlet of the fan is connected to the air outlet of the dust collector.

4. The activated carbon dust-free recovery system according to claim 3, characterized in that, The dust collector is equipped with a dust collector switch valve at its air inlet. A nitrogen pipeline is used to introduce nitrogen into the pipeline connecting the dust collector switch valve and the outlet of the water washing tower to create positive pressure between the buffer carbon box and the water washing tower.

5. The activated carbon dust-free recovery system according to claim 4, characterized in that, The positive pressure ranges from 300 to 2500 Pa.

6. The activated carbon dust-free recovery system according to claim 3, characterized in that, The buffer carbon box has a first connecting end, a second connecting end, a third connecting end and a fourth connecting end; The first connection end and the second connection end are vertically opposite each other, and the first connection end is connected to the carbon discharge port of the filter; The second connection end is used to connect to a container located below the buffer carbon box; The third connection end is connected to the air inlet of the water washing tower; The fourth connection end is connected to the discharge port of the dust collector.

7. The activated carbon dust-free recovery system according to claim 6, characterized in that, A carbon discharge valve is installed between the buffer carbon box and the filter; and A char discharge valve is installed between the buffer char box and the container.

8. The activated carbon dust-free recovery system according to claim 1, characterized in that, The buffer carbon box is funnel-shaped, and a vibrating air hammer is installed at the bottom of the buffer carbon box.

9. The activated carbon dust-free recovery system according to claim 6, characterized in that, The third connection end is located at the top of the buffer carbon box.

10. The activated carbon dust-free recovery system according to claim 1, characterized in that, A dust detector is installed in the buffer carbon box and / or the water washing tower.

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