Detachable reactor based on biochar

Abstract

The detachable reactor comprises a water supply pipe, a communicating pipe and a plurality of barrel sets, each barrel set is formed by splicing a top cover, an upper barrel, an upper grating net, a main barrel, a lower grating net, a lower barrel and a bottom cover, and the bottom cover is connected with a water inlet pipe, a water drainage pipe and a series connection pipe through a first reversing valve; the top cover is provided with a water outlet pipe with a valve and flushing pipes, the water supply pipe is provided with a water supply pump and a box body, the box body is provided with a sewage pipe and a dosing mechanism, the communicating pipe is communicated with the series connection pipes and the flushing pipes and provided with a second reversing valve, inner cavities of the upper cylinder and the lower cylinder are filled with filter materials, and an inner cavity of the main cylinder is filled with catalytic filler. Sewage is filtered and catalytically decomposed by using the filter material and the catalytic filler in the cylinder group, the cylinder group is convenient to disassemble for cleaning and replacement, and series connection, parallel connection and backwashing work of the plurality of cylinder groups can be realized through cooperation of each pipeline and each valve, so that the sewage treatment effect is ensured, and the sewage treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of sewage treatment, and in particular to a detachable reactor based on biochar. Background Art

[0002] With the rapid development of industrialization and urbanization, the problem of new pollutants has gradually become a global environmental challenge. The difficulty in controlling new pollutants lies in their strong concealment, environmental persistence and bioaccumulation, as well as their wide sources and complex governance. In the field of water treatment, removing a variety of new pollutants from water is an important and challenging task. Traditional water treatment methods, such as sedimentation, filtration and biodegradation, are often difficult to effectively remove these pollutants. Therefore, it is particularly important to develop new and efficient water treatment materials.

[0003] At present, directly synthesized metal catalysts or carbon-containing catalysts such as graphene are widely studied due to their excellent catalytic performance, but these materials are usually expensive, which limits their large-scale application. Biochar materials have attracted attention due to their low cost and sustainability. Biochar is prepared by pyrolysis of biomass materials and has a high specific surface area and porous structure, which makes it have potential application value in water treatment. However, the activation efficiency and catalytic performance of biochar materials are usually limited by their raw materials and preparation methods. With the increase in coffee consumption, the utilization and treatment of coffee grounds as an agricultural byproduct has become an environmental issue. Coffee grounds are rich in carbon elements and porous structures, making them an ideal raw material for preparing biochar. The use of coffee grounds to prepare biochar materials can not only reduce material costs, but also achieve resource recycling and reduce environmental pollution. The above-mentioned biochar materials are usually made into reactors for sewage purification. However, the existing reactors have a fixed shape and structure, which makes it difficult to disassemble and replace them as needed. The installation and replacement process is cumbersome, and it is difficult to assemble them according to the use requirements. The flexibility of use is poor and the service life is short. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies in the above-mentioned technologies and to propose a detachable biochar-based reactor to solve the above-mentioned problems.

[0005] The present invention provides a detachable biochar-based reactor, comprising a water supply pipe, a connecting pipe and a plurality of cylinder groups, wherein the cylinder group is composed of a top cover, an upper cylinder, an upper grid net, a main cylinder, a lower grid net, a lower cylinder and a bottom cover which are detachably connected in sequence, each of the bottom covers is provided with a water inlet pipe, a drain pipe and a series pipe connected to the lower cylinder, and a first reversing valve is provided at the connection point of the four, each of the top covers is provided with a water outlet pipe and a flushing pipe connected to the upper cylinder, and the water outlet pipe and the flushing pipe are connected to the upper cylinder. Valves are arranged on the pipes, a water supply pump is arranged on the water supply pipe, the water supply pipe is connected with several water inlet pipes respectively, a box is arranged on the water supply pipe, a sewage pipe and a dosing mechanism are arranged on the box, the connecting pipe is connected with several flushing pipes and several series pipes respectively, a second reversing valve is arranged at the connection between the connecting pipe, the flushing pipe and the series pipe, the inner cavities of the upper cylinder and the lower cylinder are filled with filter materials, and the inner cavity of the main cylinder is filled with catalytic filler.

[0006] Preferably, a mixing barrel, a driving mechanism and a stirring mechanism are provided on the box body, the dosing mechanism and the sewage pipe are both provided on the mixing barrel, the sewage pipe is provided with a sewage pump, the dosing mechanism is used to add an oxidant to the sewage pipe, the stirring mechanism is used to stir the material in the mixing barrel, the driving mechanism is respectively connected to the stirring mechanism and the dosing mechanism and drives the two mechanisms to work respectively, a discharge pipe is provided at the bottom of the mixing barrel, and a solenoid valve is provided at the discharge pipe.

[0007] Preferably, the driving mechanism includes a servo motor and a driving rod, the driving rod is rotatably mounted on the box, the servo motor is transmission-connected to the driving rod and drives the driving rod to rotate, and the driving rod is transmission-connected to the stirring mechanism and the dosing mechanism respectively and drives the two mechanisms to work.

[0008] Preferably, the dosing mechanism includes a dosing cartridge, a piston rod and a piston disc, the dosing cartridge is arranged on the box body, the bottom of the dosing cartridge is connected with a drug supply pipe and a dosing pipe, one end of the drug supply pipe is connected with a drug storage barrel, the dosing pipe is connected with the mixing barrel, and both the drug supply pipe and the dosing pipe are provided with a one-way valve, the piston rod is connected with the piston disc, the piston disc is movably installed on the dosing cartridge and divides the dosing cartridge into an upper and lower chamber, the piston rod is provided with a transmission mechanism for driving the piston rod to reciprocate, and the drive rod is transmission-connected to the transmission mechanism.

[0009] Preferably, the transmission mechanism includes an adjustment frame, a slider and a connecting rod, the adjustment frame is connected to the driving rod, the slider is movably installed on the adjustment frame, the adjustment frame is provided with an adjustment component for adjusting the position of the slider, one end of the connecting rod is hinged to the slider, and the other end of the connecting rod is hinged to the piston rod.

[0010] Preferably, the adjustment assembly comprises a drive motor and a screw, the screw is rotatably mounted on the adjustment frame, the drive motor is transmission-connected to the screw and drives the screw to rotate, and the slider is provided with a screw hole that cooperates with the screw.

[0011] Preferably, the stirring mechanism includes a first stirring rod, a transmission bevel gear and a driving bevel gear, the first stirring rod is rotatably mounted on the mixing barrel, the transmission bevel gear is coaxially arranged on the first stirring rod, and the driving bevel gear is coaxially arranged on the driving rod and meshes with the transmission bevel gear.

[0012] Preferably, a second stirring rod is coaxially connected to the first stirring rod, and the second stirring rod is located in the inner cavity of the box.

[0013] Preferably, the filter material filled in the inner cavities of the upper cylinder and the lower cylinder is quartz sand, and the catalytic filler filled in the inner cavity of the main cylinder is made of a mixture of coffee grounds biochar and quartz sand.

[0014] Preferably, the preparation process of the coffee grounds biochar is:

[0015] S1: Collect coffee grounds and wash them preliminarily with ultrapure water and ethanol, and dry them in an oven at 60 °C for 72 h;

[0016] S2: 0.015 mol of ferrous sulfate and 0.015 mol of manganese chloride were dissolved in 50 ml of deionized water, and then 5 g of coffee grounds treated in step S1 were added, stirred at room temperature for 12 hours, and the mixture was placed in an oven at 60° C. and dried for 24 hours to obtain a dried material;

[0017] S3: The dried material obtained in step S2 is placed in a quartz boat and calcined at a high temperature of 700°C in a N2 atmosphere at a heating rate of 10°C / min. After calcination for 2 hours, the material is cooled to room temperature to produce coffee grounds biochar.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Sewage and oxidants for decomposing pollutants are added to the box through the sewage pipe and the dosing mechanism respectively, that is, the oxidants are mixed into the sewage, and the sewage is transported through the water supply pump and the water supply pipe. The upper and lower grid nets are used to separate the chambers of the upper cylinder, the main cylinder and the lower cylinder. The filter materials are filled in the inner cavity of the upper and lower cylinders, and the catalytic filler is filled in the inner cavity of the main cylinder. The sewage flows from bottom to top inside the cylinder group, and the filtration of the filter material and the catalytic filler promote the oxidation decomposition reaction process of the oxidant, thereby realizing the purification of the sewage.

[0020] 2. By utilizing this special pipeline and valve structure design and the detachable structure of the cylinder group itself, a certain cylinder group can be stopped as needed, and the cylinder group can be disassembled and replaced without affecting the purification work of other cylinder groups.

[0021] 3. Utilizing this special pipeline and valve structure design, through the coordination of various pipelines and valves, multiple cylinder groups can be connected in series, in parallel and backwashed to ensure the sewage treatment effect and improve the sewage treatment efficiency.

[0022] 4. Coffee grounds biochar is prepared using coffee grounds as raw materials to achieve resource recycling. Its high specific surface area and rich pore structure can effectively activate oxidants, promote oxidative decomposition, and enhance sewage purification capabilities. In addition, its preparation process is simple and easy to scale up. It can be easily integrated into existing water treatment systems and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only preferred embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of multiple groups of cylinder bodies in a certain embodiment of the present invention;

[0025] Figure 2 It is a structural schematic diagram of a single cylinder group in a certain embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the internal structure of the cylinder group in a certain embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the internal structure of a box body in a certain embodiment of the present invention;

[0028] Figure 5 It is a structural schematic diagram of a transmission mechanism and an adjustment component in a certain embodiment of the present invention.

[0029] In the figure, 1-cylinder group; 11-top cover; 111-water outlet pipe; 112-flushing pipe; 12-upper cylinder; 13-upper grille; 14-main cylinder; 15-lower grille; 16-lower cylinder; 17-bottom cover; 171-water inlet pipe; 172-drain pipe; 173-series pipe; 174-first reversing valve; 2-connecting pipe; 21-second reversing valve; 3-water supply pipe; 31-water supply pump; 4-box; 41-sewage pipe; 411-sewage pump; 42-mixing barrel; 421-discharge pipe; 422-electric Magnetic valve; 5-dosing mechanism; 51-dosing cartridge; 511-dosing tube; 512-dosing tube; 513-dosage barrel; 514-check valve; 52-piston rod; 53-piston disc; 6-driving mechanism; 61-servo motor; 62-driving rod; 7-stirring mechanism; 71-first stirring rod; 711-second stirring rod; 72-transmission bevel gear; 73-driving bevel gear; 8-transmission mechanism; 81-adjusting frame; 82-sliding block; 83-connecting rod; 9-adjusting assembly; 91-driving motor; 92-screw. DETAILED DESCRIPTION

[0030] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0031] Embodiment 1:

[0032] Reference Figures 1 to 5 The present invention provides a detachable biochar-based reactor

[0033] Sewage and an oxidant for decomposing pollutants are added to the box 4 through the sewage pipe 41 and the dosing mechanism 5, that is, the oxidant is mixed into the sewage, and the sewage is transported through the water supply pump 31 and the water supply pipe 3. The upper grid mesh 13 and the lower grid mesh 15 are used to separate the chambers of the upper cylinder 12, the main cylinder 14 and the lower cylinder 16. The filter material is filled in the inner cavity of the upper and lower cylinders, and the catalytic filler is filled in the inner cavity of the main cylinder 14. The sewage enters the cylinder group 1 through the water inlet pipe 171 and flows from bottom to top. The filtration of the filter material and the catalytic filler promote the oxidation decomposition reaction process of the oxidant, thereby realizing the purification of the sewage.

[0034] By using this special pipeline and valve structure design, the series connection, parallel connection and backwashing of multiple cylinder groups 1 can be realized through the cooperation of various pipelines and valves to ensure the sewage treatment effect and improve the sewage treatment efficiency. The corresponding operation mode of the specific working mode is as follows:

[0035] 1. When multiple cylinder groups 1 are required to be connected in parallel to perform sewage treatment work separately to improve sewage treatment efficiency:

[0036] Operate the first reversing valve 174 at the corresponding cylinder group 1 to drive the lower cylinder 16 to connect with the water inlet pipe 171, open the valve at the outlet pipe 111 and close the valve at the flushing pipe 112, and the sewage flows through the water supply pipe 3, the cylinder group 1 and the outlet pipe 111, so that multiple cylinder groups 1 can be connected in parallel and synchronously to purify sewage, thereby improving the sewage treatment efficiency.

[0037] 2. When multiple cylinder groups 1 are required to be connected in series to treat sewage and improve the sewage treatment effect:

[0038] Operate the first reversing valve 174 and the valve at the corresponding cylinder group 1, connect the lower cylinder 16 at the first cylinder group 1 with the water inlet pipe 171 and connect the lower cylinders 16 at other cylinder groups 1 with the series pipe 173, then open the valve of the outlet pipe 111 at the last cylinder group 1 and open the valves of the flushing pipe 112 at other cylinder groups 1, operate each second reversing valve 21 at the connecting pipe 2 to drive the connecting pipe 2 to connect with the series pipe 173, the sewage can flow through multiple cylinder groups 1 and be discharged through the outlet pipe 111 of the last cylinder group 1, realize the sewage purification work by connecting multiple cylinder groups 1 in series, make the sewage undergo multiple filtration and catalysis, and improve the sewage treatment effect.

[0039] 3. When backwashing is required on a cylinder group 1:

[0040] Operate the reversing valve and valve at the corresponding cylinder group 1, connect the lower cylinder 16 of a cylinder group 1 with the water inlet pipe 171 and open the valve at its flushing pipe 112, connect the lower cylinder 16 of the cylinder group 1 to be cleaned with the drain pipe 172 and open the valve at its flushing pipe 112, operate the second reversing valve 21 at the connecting pipe 2 corresponding to the two cylinders, drive the connecting pipe 2 to be connected with the flushing pipe 112, and drive the purified sewage to be backwashed from top to bottom in the cylinder group 1 to be cleaned, which is beneficial to remove stains on the surface of the filter material and the catalytic filler and increase its service life. By using this special pipeline and valve structure design, the backwashing process can be carried out without affecting the purification work of other cylinder groups 1.

[0041] By utilizing this special pipeline and valve structure design, the lower cylinder 16 of a certain cylinder group 1 can be driven to connect with the drain pipe 172 as needed, and the valves at its outlet pipe 111 and flushing pipe 112 can be driven to close, that is, the cylinder group 1 can be disassembled and replaced without affecting the purification work of other cylinder groups 1.

[0042] Among them, the top cover 11, the upper cylinder 12, the main cylinder 14, the lower cylinder 16, the bottom cover 17 and the grille net are all detachably connected by bolts and nuts. The specific structure is as follows: both ends of the upper cylinder 12, both ends of the main cylinder 14 and both ends of the lower cylinder 16 are provided with connecting rings, and the connecting rings, the top cover 11, the bottom cover 17, the upper grille net 13 and the lower grille net 15 are provided with a plurality of mounting holes for bolts to pass through. The top cover 11, the upper cylinder 12, the upper grille net 13, the main cylinder 14, the lower grille net 15, the lower cylinder 16 and the bottom cover 17 can be assembled into the cylinder group 1 in the order of bolts passing through the mounting holes and tightening with nuts, so as to facilitate disassembly, cleaning and replacement of filter materials as needed. The agent added by the dosing mechanism 5 is an oxidant containing persulfate. The connecting pipe 2 is connected with a plurality of branch pipes, and the second reversing valve 21 is arranged on the branch pipes. The branch pipes are respectively connected with the series pipe 173 and the flushing pipe 112 through the second reversing valve 21 .

[0043] Embodiment 2:

[0044] Reference Figures 1 to 5 Combined with the technical solution of Example 1, in this embodiment, a mixing barrel 42, a driving mechanism 6 and a stirring mechanism 7 are provided on the box body 4, the dosing mechanism 5 and the sewage pipe 41 are both provided on the mixing barrel 42, a sewage pump 411 is provided on the sewage pipe 41, the dosing mechanism 5 is used to add an oxidant to the sewage pipe 41, the stirring mechanism 7 is used to stir the material in the mixing barrel 42, the driving mechanism 6 is respectively connected to the stirring mechanism 7 and the dosing mechanism 5 and drives the two mechanisms to work respectively, a discharge pipe 421 is provided at the bottom of the mixing barrel 42, and a solenoid valve 422 is provided at the discharge pipe 421.

[0045] Sewage is added to the mixing barrel 42 through the sewage pump 411, and the driving mechanism 6 drives the stirring mechanism 7 and the dosing mechanism 5 to work, and the oxidant is added to the mixing barrel 42 and stirred, so that the sewage addition, the oxidant addition and the stirring work form a linkage coordination, and a working mode of stirring while adding is realized, which is conducive to the uniform mixing of the sewage and the oxidant. The solenoid valve 422 can be opened to discharge the sewage mixed with the oxidant into the box 4 through the discharge pipe 421.

[0046] Specifically, the driving mechanism 6 includes a servo motor 61 and a driving rod 62, the driving rod 62 is rotatably mounted on the box body 4, the servo motor 61 is transmission-connected with the driving rod 62 and drives the driving rod 62 to rotate, and the driving rod 62 is transmission-connected with the stirring mechanism 7 and the dosing mechanism 5 respectively and drives the two mechanisms to work. The use of the servo motor 61 with adjustable speed facilitates the adjustment of the working state of the stirring mechanism 7 and the dosing mechanism 5 as needed.

[0047] Specifically, the dosing mechanism 5 includes a dosing cartridge 51, a piston rod 52 and a piston disc 53. The dosing cartridge 51 is arranged on the box body 4. A drug supply pipe 511 and a dosing pipe 512 are connected to the bottom of the dosing cartridge 51. One end of the drug supply pipe 511 is connected to a drug storage barrel 513. The dosing pipe 512 is connected to the mixing barrel 42. Both the drug supply pipe 511 and the dosing pipe 512 are provided with a one-way valve 514. The piston rod 52 is connected to the piston disc 53. The piston disc 53 is movably installed on the dosing cartridge 51 and divides the dosing cartridge 51 into an upper and lower chamber. A transmission mechanism 8 is provided on the piston rod 52 to drive the piston rod 52 to move back and forth, and the drive rod 62 is transmission-connected to the transmission mechanism 8.

[0048] The servo motor 61 drives the transmission mechanism 8 to work through the driving rod 62, and the transmission mechanism 8 drives the piston rod 52 and the piston disc 53 to reciprocate relative to the dosing cylinder 51. During the process of the piston disc 53 rising to drive the expansion of the lower chamber of the dosing cylinder 51, under the action of negative pressure, the one-way valve 514 at the drug supply pipe 511 is opened, and the one-way valve 514 at the dosing pipe 512 is closed, and the oxidant at the drug storage barrel 513 is extracted to the lower chamber of the dosing cylinder 51. During the process of the piston disc 53 descending and squeezing the lower chamber of the dosing cylinder 51, under the action of positive pressure, the one-way valve 514 at the drug supply pipe 511 is closed, and the one-way valve 514 at the dosing pipe 512 is opened, and the oxidant is squeezed into the mixing barrel 42 through the dosing pipe 512 to achieve the dosing work. Among them, the use of a servo motor 61 with adjustable speed is convenient for adjusting the reciprocating speed of the piston disc 53 as needed, so as to adjust the dosing speed according to the sewage flow rate.

[0049] Specifically, the transmission mechanism 8 includes an adjustment frame 81, a slider 82 and a connecting rod 83. The adjustment frame 81 is connected to the driving rod 62. The slider 82 is movably installed on the adjustment frame 81. The adjustment frame 81 is provided with an adjustment component 9 for adjusting the position of the slider 82. One end of the connecting rod 83 is hinged to the slider 82, and the other end of the connecting rod 83 is hinged to the piston rod 52.

[0050] The adjusting frame 81 and the sliding block 82 are driven to rotate by the driving rod 62, and the sliding block 82 drives the piston rod 52 and the piston plate 53 to reciprocate relative to the dosing cylinder 51 through the connecting rod 83, so as to realize the dosing work.

[0051] Specifically, the adjustment assembly 9 includes a drive motor 91 and a screw rod 92 . The screw rod 92 is rotatably mounted on the adjustment frame 81 . The drive motor 91 is transmission-connected to the screw rod 92 and drives the screw rod 92 to rotate. The slider 82 is provided with a screw hole that matches the screw rod 92 .

[0052] The screw 92 is driven to rotate by the driving motor 91. During the rotation of the screw 92, the screw 92 cooperates with the screw hole on the slider 82 to drive the slider 82 to move, thereby adjusting the position of the slider 82 relative to the adjustment frame 81, so as to adjust the rotation radius of the slider 82, thereby adjusting the stroke range of the reciprocating movement of the piston disk 53 relative to the dosing cylinder 51, and realizing the adjustment of the dosing amount, which is convenient for adjusting the dosing amount according to needs.

[0053] Embodiment 3:

[0054] Reference Figures 1 to 5 Combining the technical solutions of Example 1 and Example 2, in this embodiment, the stirring mechanism 7 includes a first stirring rod 71, a transmission bevel gear 72 and a driving bevel gear 73. The first stirring rod 71 is rotatably mounted on the mixing barrel 42, the transmission bevel gear 72 is coaxially arranged on the first stirring rod 71, and the driving bevel gear 73 is coaxially arranged on the driving rod 62 and meshes with the transmission bevel gear 72.

[0055] The servo motor 61 drives the driving rod 62 to rotate, and drives the first stirring rod 71 to rotate through the transmission action of the driving bevel gear 73 and the transmission bevel gear 72, thereby achieving stirring work.

[0056] Specifically, a second stirring rod 711 is coaxially connected to the first stirring rod 71 , and the second stirring rod 711 is located in the inner cavity of the box body 4 .

[0057] The first stirring rod 71 drives the second stirring rod 711 to rotate to stir the sewage in the box 4, so that the sewage and the oxidant are mixed more evenly.

[0058] Among them, by utilizing the adjustable speed feature of the servo motor 61, the stirring speed of the first stirring rod 71 can be adjusted according to the sewage flow rate, and the dosage can be adjusted by adjusting the component 9 based on the sewage flow rate and the stirring speed, thereby realizing the linkage coordination of sewage addition, oxidant addition and stirring, which is beneficial to the uniform mixing of sewage and oxidant and improves the sewage purification effect.

[0059] Specifically, the filter material filled in the inner cavity of the upper cylinder 12 and the lower cylinder 16 is quartz sand, and the catalytic filler filled in the inner cavity of the main cylinder 14 is made of a mixture of coffee grounds biochar and quartz sand. The present embodiment uses 200-mesh quartz sand, which helps to evenly distribute the water flow, reduce hydraulic shock, increase the contact opportunity between the active oxidizing substances and the pollutants in the water, and make the sewage more stably oxidized at the main cylinder 14, while preliminarily filtering large particles of impurities. And the upper grid mesh 13 and the lower grid mesh 15 structure can effectively space the filler to prevent the filler from shifting to other cylinder cavities.

[0060] The preparation process of coffee grounds biochar is as follows:

[0061] S1: Collect coffee grounds and wash them preliminarily with ultrapure water and ethanol, and dry them in an oven at 60 °C for 72 h;

[0062] S2: 0.015 mol of ferrous sulfate and 0.015 mol of manganese chloride were dissolved in 50 ml of deionized water, and then 5 g of coffee grounds treated in step S1 were added, stirred at room temperature for 12 hours, and the mixture was placed in an oven at 60° C. and dried for 24 hours to obtain a dried material;

[0063] S3: The dried material obtained in step S2 is placed in a quartz boat and calcined at a high temperature of 700°C in a N2 atmosphere at a heating rate of 10°C / min. After calcination for 2 hours, the material is cooled to room temperature to produce coffee grounds biochar.

[0064] The large amount of oxidative active substances produced by the persulfate activation of the coffee grounds biochar will react with pollutants in the water to oxidize and decompose them, thereby enhancing the sewage purification effect.

[0065] The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the above technical content without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any changes, modifications, equivalent changes and modifications made to the above embodiments based on the technology of the present invention without departing from the content of the technical solution of the present invention belong to the protection scope of the present technical solution.

Claims

1. A detachable biochar-based reactor, characterized in that: It comprises a water supply pipe, a connecting pipe and several cylinder groups, wherein the cylinder group is composed of a top cover, an upper cylinder, an upper grille, a main cylinder, a lower grille, a lower cylinder and a bottom cover which are detachably connected in sequence, each of the bottom covers is provided with a water inlet pipe, a drain pipe and a series pipe connected with the lower cylinder, and a first reversing valve is provided at the connection between the four, each of the top covers is provided with a water outlet pipe and a flushing pipe connected with the upper cylinder, valves are provided on the water outlet pipe and the flushing pipe, a water supply pump is provided on the water supply pipe, the water supply pipe is respectively connected with several of the water inlet pipes, a box is provided on the water supply pipe, a sewage pipe and a dosing mechanism are provided on the box, the connecting pipe is respectively connected with several of the flushing pipes and several series pipes, a second reversing valve is provided at the connection between the connecting pipe, the flushing pipe and the series pipe, the inner cavities of the upper cylinder and the lower cylinder are filled with filter material, and the inner cavity of the main cylinder is filled with catalytic filler.

2. A detachable biochar-based reactor according to claim 1, characterized in that: A mixing barrel, a driving mechanism and a stirring mechanism are arranged on the box body; the dosing mechanism and the sewage pipe are both arranged on the mixing barrel; a sewage pump is arranged on the sewage pipe; the dosing mechanism is used to add an oxidant to the sewage pipe; the stirring mechanism is used to stir the material in the mixing barrel; the driving mechanism is respectively connected to the stirring mechanism and the dosing mechanism and drives the two mechanisms to work respectively; a discharge pipe is arranged at the bottom of the mixing barrel; and a solenoid valve is arranged at the discharge pipe.

3. A detachable biochar-based reactor according to claim 2, characterized in that: The driving mechanism includes a servo motor and a driving rod, the driving rod is rotatably mounted on the box body, the servo motor is transmission-connected to the driving rod and drives the driving rod to rotate, and the driving rod is transmission-connected to the stirring mechanism and the dosing mechanism respectively and drives the two mechanisms to work.

4. A detachable biochar-based reactor according to claim 3, characterized in that: The dosing mechanism includes a dosing cartridge, a piston rod and a piston disc. The dosing cartridge is arranged on the box body. A drug supply pipe and a dosing pipe are connected to the bottom of the dosing cartridge. One end of the drug supply pipe is connected to a drug storage barrel. The dosing pipe is connected to the mixing barrel. Both the drug supply pipe and the dosing pipe are provided with a one-way valve. The piston rod is connected to the piston disc. The piston disc is movably installed on the dosing cartridge and divides the dosing cartridge into an upper and a lower chamber. A transmission mechanism for driving the piston rod to reciprocate is provided on the piston rod, and the drive rod is in transmission connection with the transmission mechanism.

5. A detachable biochar-based reactor according to claim 4, characterized in that: The transmission mechanism includes an adjustment frame, a slider and a connecting rod. The adjustment frame is connected to the driving rod. The slider is movably installed on the adjustment frame. The adjustment frame is provided with an adjustment component for adjusting the position of the slider. One end of the connecting rod is hinged to the slider, and the other end of the connecting rod is hinged to the piston rod.

6. A detachable biochar-based reactor according to claim 5, characterized in that: The adjustment assembly includes a driving motor and a screw rod. The screw rod is rotatably mounted on the adjustment frame. The driving motor is transmission-connected with the screw rod and drives the screw rod to rotate. The slider is provided with a screw hole that matches the screw rod.

7. The biochar-based detachable reactor according to claim 3, characterized in that: The stirring mechanism includes a first stirring rod, a transmission bevel gear and a driving bevel gear. The first stirring rod is rotatably mounted on the mixing barrel, the transmission bevel gear is coaxially arranged on the first stirring rod, and the driving bevel gear is coaxially arranged on the driving rod and meshes with the transmission bevel gear.

8. The biochar-based detachable reactor according to claim 7, characterized in that: A second stirring rod is coaxially connected to the first stirring rod, and the second stirring rod is located in the inner cavity of the box.

9. The biochar-based detachable reactor according to claim 1, characterized in that: The filter material filled in the inner cavity of the upper cylinder and the lower cylinder is quartz sand, and the catalytic filler filled in the inner cavity of the main cylinder is made of a mixture of coffee grounds biochar and quartz sand.

10. The coffee grounds biochar according to claim 9, wherein the preparation process is: S1: Collect coffee grounds and wash them preliminarily with ultrapure water and ethanol, and dry them in an oven at 60 °C for 72 h; S2: 0.015 mol of ferrous sulfate and 0.015 mol of manganese chloride were dissolved in 50 ml of deionized water, and then 5 g of coffee grounds treated in step S1 were added, stirred at room temperature for 12 hours, and the mixture was placed in an oven at 60° C. and dried for 24 hours to obtain a dried material; S3: The dried material obtained in step S2 is placed in a quartz boat and calcined at a high temperature of 700°C in a N2 atmosphere at a heating rate of 10°C / min. After calcination for 2 hours, the material is cooled to room temperature to produce coffee grounds biochar.

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