Microwave ultraviolet carbon sequestration adsorbent regeneration method and system for sewage treatment

Abstract

The invention provides a method for regenerating an adsorbent through microwave and ultraviolet carbon sequestration for sewage treatment, which comprises the following steps of: regenerating an adsorbed and saturated composite adsorption material by microwave coupled ultraviolet radiation under an anoxic condition, and further immobilizing and carbonizing organic carbon in organic sewage so as to achieve the purpose of regenerating the composite adsorption material. And waste heat generated in the carbon sequestration regeneration process is used for providing heat energy for drying the adsorbent. The invention also provides a microwave ultraviolet carbon sequestration regeneration adsorbent system for sewage treatment, the system comprises two groups of microwave ultraviolet carbon sequestration regeneration adsorbent mechanisms and a heat exchange pipeline, and the mechanisms are used for resourceful treatment of organic sewage. The heat exchange pipeline provides waste heat generated in the carbon sequestration regeneration process of one set of mechanism to the other set of mechanism through the time difference, and the composite adsorption material is dried and dehydrated. The problems of carbon emission in organic wastewater treatment, solid waste derived after sewage treatment by an adsorption method, hazardous waste, continuous reduction of the adsorption capacity of an adsorbent, high energy consumption and cost of device operation and the like are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of organic sewage treatment, and particularly relates to a microwave ultraviolet carbon fixation and regeneration adsorbent method and system for sewage treatment. Background Art

[0002] The carbon emissions of the sewage treatment industry account for 1% - 2% of the total social carbon emissions, including direct carbon emissions and indirect carbon emissions. Among them, direct carbon emissions mainly come from the escape of CH4 and CO2 during the organic sewage treatment reaction process, and indirect carbon emissions are mainly the consumption of electricity, chemicals, etc. during the production process. Therefore, developing new treatment technologies that can simultaneously reduce direct and indirect carbon emissions in the sewage treatment industry to reduce the carbon emissions of this industry has important environmental and economic significance.

[0003] The energy consumption characteristic of the traditional sewage treatment industry is the need for stable and continuous power supply. However, the intermittency of currently vigorously developed green energy power generation such as solar energy and wind energy leads to large fluctuations in the net load, which will cause great damage to infrastructure such as the power grid and conventional fossil energy thermal power plants that require continuous and stable operation; thus, methods such as abandoning wind and electricity are often used to solve the problem of stable net load, resulting in a large amount of waste. The microwave radiation heating regeneration adsorption treatment of the adsorbent after treating organic sewage, which can flexibly select the power consumption time period, has the advantages of not using a heat medium, rapid temperature rise, and no heat inertia when starting and stopping. Using it to treat the adsorbed organic pollutants can not only reduce the energy consumption cost of this industry by making full use of green energy, but also provide a new way for the power grid to cut peaks.

[0004] Another characteristic of the traditional sewage treatment industry is that the organic carbon in pollutants is converted into CH4 and CO2, and the escape into the atmosphere will enhance the greenhouse effect; while the adsorption method can remove the organic pollutants in the wastewater by enriching and fixing them on the surface of the adsorption material, which not only avoids the escape of greenhouse gases, but also can be intensively and deeply treated in a variety of flexible ways such as intermittently and batchwise. It is one of the fastest, energy-saving and efficient methods for removing pollutants in the environment at present. The adsorption method for treating pollution technology at home and abroad has developed relatively maturely, but in practical applications, it is difficult to be widely used due to factors such as limited adsorption capacity of the adsorption material, large amount of solid waste produced after use and mostly hazardous waste, and high material consumption cost and disposal cost, and it is only mostly used in special occasions such as emergency treatment or advanced treatment. If the adsorption material can be regenerated by an efficient and harmless method to improve the service life of the adsorption material, the adsorption method can be widely used.

[0005] The microwave radiation heating regeneration adsorbent has the advantages of flexibility, easy control, and high efficiency, but requires the adsorption material (activated carbon; graphite, etc.) to have the properties of absorbing wave and heating up and being stable at high temperatures; the currently reported adsorption material technologies using microwave radiation regeneration have problems such as high-temperature ablation, serious carbon loss, and CO2 emissions that hinder their practical application. Summary of the Invention

[0006] In order to solve the technical problems such as the carbon emission problem in current organic wastewater treatment technology, the solid waste problem, hazardous waste problem derived from sewage treatment by the adsorption method, the continuous decline of the adsorption capacity of the adsorbent, and the high energy consumption cost of device operation, the present invention provides a microwave ultraviolet carbon fixation and regeneration adsorbent method and system for sewage treatment.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The present invention provides a microwave ultraviolet carbon fixation and regeneration adsorbent method for sewage treatment, which is carried out according to the following steps:

[0009] Step 1: The first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms adsorb organic sewage;

[0010] Step 2: The composite adsorbing materials of the first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms are dried and dehydrated;

[0011] Step 3: The first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to fix carbon and regenerate the composite adsorbing materials. After that, the waste heat generated during the carbon fixation and regeneration process of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms is used to dry and dehydrate the composite adsorbing materials of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms; at the same time, the temperature of the composite adsorbing materials of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms is reduced to below 100 °C;

[0012] Step 4: The first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms adsorb organic sewage;

[0013] Step 5: The second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to fix carbon and regenerate the composite adsorbing materials. After that, the waste heat generated during the carbon fixation and regeneration process of the second group is used to dry and dehydrate the composite adsorbing materials of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms; at the same time, the temperature of the composite adsorbing materials of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms is reduced to below 100 °C;

[0014] Step 6: The second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms adsorb organic sewage;

[0015] Step 7: The operations of Step 3 to Step 6 are sequentially repeated, and the first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms alternately use the composite adsorbing materials to fix carbon and regenerate and adsorb organic sewage.

[0016] Further, the composite adsorbent material is prepared by mixing and loading the Group A adsorbent material and the Group B adsorbent material in different ratios. The Group A adsorbent material is one or both of activated carbon and biomass carbon, and the Group B adsorbent material is any one or more of graphite, carbon nanotubes, Fe3O4, MnO2, BN, and SiC. The volume ratio of the Group A adsorbent material in the composite adsorbent material is 60% - 99%, and the volume ratio of the Group B adsorbent material in the composite adsorbent material is 1% - 40%.

[0017] Further, Step 3 and Step 5 are carried out under anoxic conditions, which are achieved by evacuating and introducing nitrogen or inert gas.

[0018] Further, in Step 3 and Step 5, the relevant parameters for carbon fixation and regeneration of the composite adsorbent material by the method of microwave-coupled ultraviolet radiation are as follows: the material is heated to 300°C - 600°C, and the heating power and reaction time are determined according to the quality of the organic sewage and the total volume of the composite adsorbent material.

[0019] The present invention also provides a microwave ultraviolet carbon fixation and regeneration adsorbent system for sewage treatment, which is used to implement the above-mentioned microwave ultraviolet carbon fixation and regeneration adsorbent method for sewage treatment. The system includes two groups of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms and a heat exchange pipeline. The microwave ultraviolet carbon fixation and regeneration adsorbent mechanism uses the method of microwave-coupled ultraviolet radiation to regenerate the composite adsorbent material for resource treatment of organic sewage. The heat exchange pipeline uses the time difference to provide the waste heat generated during the carbon fixation and regeneration process of one group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms to the other group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms for drying and dehydrating the composite adsorbent material.

[0020] Further, the microwave ultraviolet carbon fixation and regeneration adsorbent mechanism includes a ceramic reaction kettle, a quartz glass adsorption column, a microwave heating furnace;

[0021] The ceramic reaction kettle is placed in the microwave heating furnace in an embedded manner; a quartz glass adsorption column is placed in the ceramic reaction kettle;

[0022] The quartz glass adsorption column is a hollow cylinder structure, and the hollow inner cavity is filled with a composite adsorbent material, and partition components are respectively placed at the upper and lower positions of the composite adsorbent material;

[0023] The microwave heating furnace includes a microwave emission source and a microwave heating furnace cavity;

[0024] An annular space is formed between the ceramic reactor and the quartz glass adsorption column, and an array of electrodeless ultraviolet lamps are arranged in the annular space to provide an ultraviolet light source; an upper air vent is arranged between the annular space and the upper flange cover as an air inlet or an air outlet, and a lower air vent is arranged between the annular space and the lower flange cover as an air inlet or an air outlet, and the upper air vent and the lower air vent are distributed on both sides of the annular space;

[0025] The ceramic reactor comprises a reactor body, an upper flange cover and a lower flange cover, wherein the upper flange cover is fixedly connected to a water / gas outlet, and the lower flange cover is fixedly connected to a water / gas inlet; after the upper flange cover and the lower flange cover of the ceramic reactor are fastened to the reactor body, an airtight space is formed between the upper flange cover, the lower flange cover and the quartz glass adsorption column.

[0026] Furthermore, the heat exchange pipeline includes a vent pipe, a vent, a valve, and a vacuum pump.

[0027] Furthermore, the barrier component is made of a material with high heat resistance and good water permeability.

[0028] Furthermore, a microwave shielding net is placed outside the barrier component to shield microwaves.

[0029] Furthermore, a rubber sealing gasket is placed between the upper flange cover, the lower flange cover and the ceramic reactor body, and a ring-shaped cooling water pipe is arranged around the sealing gasket to cool the energy of microwave radiation heating.

[0030] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0031] (1) The present invention uses microwave-coupled ultraviolet radiation to irradiate the saturated composite adsorbent material in an oxygen-deficient environment, so that the organic carbon adsorbed thereon is polymerized and carbonized on the surface of the material, and a new porous medium is formed to regenerate the composite adsorbent material for re-adsorption. The problem of surface adsorbed organic pollutants being oxidized at high temperature to produce CO2 is solved, and the material consumption cost is reduced by realizing the regeneration and reuse of the adsorbent, thereby achieving the effect of resource utilization of organic wastewater.

[0032] (2) The present invention adopts an adsorption method to remove organic pollutants in organic wastewater in a flexible manner of intermittent and batch processes. At the same time, two or more groups (taking two groups as an example) of solid adsorbent regeneration devices combined with microwave ultraviolet radiation cyclic adsorption and regeneration are set up. The heat energy generated by absorbing microwave radiation during the regeneration process of one group of solid adsorbent cyclic regeneration devices is provided through a heat exchange pipeline to provide the heat for dehydration and drying of the adsorbent saturated with adsorption in another group of solid adsorbent cyclic regeneration devices, so as to reduce the energy consumption cost of pollutant treatment. At the same time, the heat exchange pipeline is used to improve the process energy efficiency.

[0033] (3) The present invention uses microwave radiation, which can operate without a heat medium and has no thermal inertia. Different reaction temperature requirements can be met by adjusting the radiation power and radiation time. The power consumption period of this invention is flexible. During the peak power generation periods of green energy sources such as solar energy and wind power, the microwave ultraviolet regeneration operation can be started to reduce indirect carbon emissions. It can not only reduce the energy consumption cost of pollutant treatment through the full utilization of green energy sources, but also provide a new way for power grid peak shaving.

[0034] (4) The present invention emits ultraviolet light with a wavelength range of 185 - 365 nm through a microwave ultraviolet lamp, which can cause the organic pollutants on the adsorption material to undergo a photopolymerization reaction, reduce the escape of CO2, promote carbonization and fixation, and at the same time block secondary pollution, achieving the purpose of reducing direct carbon emissions such as CO2. Brief Description of the Drawings

[0035] Figure 1 It is a schematic top - view of the microwave ultraviolet carbon - fixation and regeneration adsorbent mechanism of the present invention;

[0036] Figure 2 It is a schematic cross - sectional structure of the microwave ultraviolet carbon - fixation and regeneration adsorbent mechanism of the present invention;

[0037] Figure 3 It is a schematic diagram of the microwave ultraviolet carbon - fixation and regeneration adsorbent system for sewage treatment of the present invention.

[0038] Reference Numerals:

[0039] 1. Ceramic reaction kettle; 2. Quartz glass adsorption column; 3. Microwave heating furnace;

[0040] 4. Upper flange cover; 5. Lower flange cover; 6. Water / gas outlet;

[0041] 7. Water / gas inlet; 8. Composite adsorption material; 9. Baffle component;

[0042] 10. Microwave shielding net; 11. Microwave heating furnace cavity; 12. Microwave emission source;

[0043] 13. Microwave ultraviolet lamp; 14. Upper ventilation port; 15. Lower ventilation port;

[0044] 16. Annular cooling water pipe; 17. Cooling water inlet; 18. Cooling water outlet;

[0045] 19. First water / gas pipeline; 20. Second water / gas pipeline; 21. First water / gas inlet;

[0046] 22. Second water / gas inlet; 23. First water / gas outlet; 24. Second water / gas outlet;

[0047] 25. First three-way valve; 26. Second three-way valve; 27. Third three-way valve;

[0048] 28. Fourth three-way valve; 29. Third water / gas pipeline; 30. Fourth water / gas pipeline;

[0049] 31. Fifth water / gas pipeline; 32. Sixth water / gas pipeline; 33. First ventilation port;

[0050] 34. Second ventilation port; 35. Third ventilation port; 36. Fourth ventilation port;

[0051] 37. First ventilation pipe; 38. Second ventilation pipe; 39. Vacuum pump. Detailed implementation manners

[0052] In view of the above situation, to overcome the problems existing at the present stage, the present invention uses microwave coupling ultraviolet radiation to regenerate the composite adsorbent that has been adsorbed and saturated under anoxic conditions, further fixes the organic carbon in the carbonized organic sewage to achieve the purpose of regenerating the composite adsorbent, and uses the waste heat generated during the carbon fixation and regeneration process to provide heat energy for drying the adsorbent, further reducing energy consumption, and realizing carbon emission reduction and resource utilization in sewage treatment.

[0053] Terms such as "first", "second", "third", "fourth", "first number", "second number", "third number", "fourth number" in the present invention are only for the purpose of description and do not represent any order, number of times and relative importance.

[0054] To make the purpose, technical solutions and advantages of the present invention clearer, the following further describes the embodiments of the present invention in detail with reference to the accompanying drawings. Detailed implementation manner one:

[0056] The present invention provides a method for microwave ultraviolet carbon fixation and regeneration of an adsorbent for sewage treatment, which is carried out according to the following steps:

[0057] Step 1: The first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms adsorb organic sewage;

[0058] Step 2: The composite adsorbents of the first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms are dried and dehydrated;

[0059] Step 3: The first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to fix carbon and regenerate the composite adsorbent. After that, the waste heat generated during the carbon fixation and regeneration process of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms is used to dry and dehydrate the composite adsorbents of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms; at the same time, the temperature of the composite adsorbents of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms is reduced to below 100 °C;

[0060] Step Four: The first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism adsorbs organic sewage;

[0061] Step Five: The second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism fixes carbon and regenerates the composite adsorbent material by using the method of microwave coupled with ultraviolet radiation. After that, the heat generated during the carbon-fixing and regeneration process of the second group is used to dry and dehydrate the composite adsorbent material of the first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism; meanwhile, the temperature of the composite adsorbent material of the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism is reduced to below 100 °C;

[0062] Step Six: The second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism adsorbs organic sewage;

[0063] Step Seven: The operations of Step Three to Step Six are sequentially repeated, and the first group and the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms alternately use the composite adsorbent material to fix carbon and regenerate and adsorb organic sewage.

[0064] The composite adsorbent material used in the present invention is a material with adsorption performance and wave absorption characteristics. The material ratio of the composite adsorbent material is determined according to the physical and chemical properties of the organic sewage to be treated. The composite adsorbent material is filled with the A group of adsorbent materials and the B group of adsorbent materials in different ratios. The A group of adsorbent materials is one or two of activated carbon and biomass carbon, and the B group of adsorbent materials is any one or more of graphite, carbon nanotubes, Fe3O4, MnO2, BN, and SiC; wherein the volume ratio of the A group of adsorbent materials in the composite adsorbent material is 60% to 99%, and the volume ratio of the B group of adsorbent materials in the composite adsorbent material is 1% to 40%.

[0065] Step Three and Step Five are carried out under anoxic conditions. The present invention sets the oxygen content lower than 0.5 vol% as the anoxic condition, and the anoxic condition is completed by vacuum pumping and introducing nitrogen or inert gas.

[0066] In Step Three and Step Five, the relevant parameters for fixing carbon and regenerating the composite adsorbent material by using the method of microwave combined with ultraviolet light are: heating the material to 300 °C to 600 °C, and the heating power and reaction time are determined according to the water quality of the organic sewage and the total volume of the composite adsorbent material. Specific Embodiment Two:

[0068] The present invention also provides a microwave ultraviolet carbon-fixing and regenerating adsorbent system for sewage treatment, which is used to implement the above-mentioned microwave ultraviolet carbon-fixing and regenerating adsorbent method for sewage treatment; the system includes two sets of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms and a heat exchange pipeline; the microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism uses the method of microwave-coupled ultraviolet radiation to regenerate the composite adsorbent to resourcefully treat organic sewage; the heat exchange pipeline uses the time difference to provide the waste heat generated during the carbon-fixing and regeneration process of one set of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms to the other set of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms to dry and dehydrate the composite adsorbent.

[0069] Resourceful treatment is to carbonize and fix the organic carbon in organic sewage to generate biomass carbon, making it a part of the composite adsorbent and continuing to act as an adsorbent.

[0070] The microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism includes a ceramic reaction kettle 1, a quartz glass adsorption column 2, a microwave heating furnace 3, and a microwave heating furnace 3.

[0071] The ceramic reaction kettle 1 is placed in the microwave heating furnace 3 in an embedded manner; a quartz glass adsorption column 2 is placed inside the ceramic reaction kettle 1.

[0072] The quartz glass adsorption column 2 is a hollow cylinder structure, and the hollow inner cavity is filled with a composite adsorbent 8, and partition members 9 are respectively placed at the upper and lower positions of the composite adsorbent 8. The material of the adsorption column is quartz glass, so that the adsorption column can transmit ultraviolet light during the carbon-fixing and regeneration process and is suitable for high-temperature conditions. The inner diameter and height of the quartz glass adsorption column 2 are set according to the amount of organic sewage treatment. The partition member 9 is made of a material with high heat resistance and good water permeability, preferably quartz fiber cotton or ceramic fiber cotton. A microwave shielding net 10 is placed outside the partition member 9 to shield microwaves. In the present invention, a honeycomb metal net is selected as the microwave shielding net 10, and only organic sewage and gas are allowed to pass through. The partition member 9 and the microwave shielding net 10 can fix the composite adsorbent 8.

[0073] The ceramic reaction kettle 1 includes a kettle body, an upper flange cover 4 and a lower flange cover 5. The upper flange cover 4 is fixedly connected to a water / gas outlet 6, and the lower flange cover 5 is fixedly connected to a water / gas inlet 7; organic sewage enters from the lower water / gas inlet 7, flows through the composite adsorbent 8, and then flows out from the upper water / gas outlet 6. The inner diameters of the water / gas inlet 7 and the water / gas outlet 6 are determined according to the physical and chemical properties of the organic sewage to be treated and the amount of organic sewage treatment. The flow rate of the organic sewage is determined according to the reaction residence time through the quartz glass adsorption column 2 and the physical and chemical properties of the organic sewage.

[0074] After the organic sewage adsorption process is completed, the sewage in the adsorption column is discharged by gravity, and then the composite adsorbent 8 is completely dehydrated by means of air extraction, and the air extraction is completed through the water / gas inlet 7 and the water / gas outlet 6.

[0075] The microwave heating furnace 3 includes a microwave emission source 12 and a microwave heating furnace cavity 11; the microwave emission source 12 includes a microwave generator and a waveguide; the microwave generator is a microwave magnetron or a microwave solid state source, and the microwave frequency can be selected as 2450 MHz frequency or 915 MHz frequency. The size of the microwave generator is customized according to the capacity of the ceramic reaction kettle 1.

[0076] An annular space is formed between the ceramic reaction kettle 1 and the quartz glass adsorption column 2, and a plurality of inductionless ultraviolet lamps 13 are arranged in the annular space to provide an ultraviolet light source; there is a certain interval between every two inductionless ultraviolet lamps 13, and the wavelength range of the ultraviolet light radiated by the inductionless ultraviolet lamps 13 is 185 - 365 nm. An upper ventilation port 14 is provided between the annular space and the upper flange cover 4 as an air inlet or an air outlet, and a lower ventilation port 15 is provided between the annular space and the lower flange cover 5 as an air inlet or an air outlet. The upper ventilation port 14 and the lower ventilation port 15 are distributed on both sides of the annular space.

[0077] The size of the ceramic reaction kettle 1 is determined according to the organic sewage treatment volume and physical and chemical properties; the kettle body of the ceramic reaction kettle 1 is made of ceramic by processing. The wave - transmitting performance of the ceramic enables the microwave generated by the microwave heating furnace 3 to radiate onto the inductionless ultraviolet lamps 13 in the inner cavity of the ceramic reaction kettle 1 and the composite adsorption material 8 in the quartz glass adsorption column 2.

[0078] The upper flange cover 4 and the lower flange cover 5 of the ceramic reaction kettle 1 are outside the microwave heating furnace 3. The microwave shielding net 10 controls the microwave radiated by the microwave generator within the corresponding area of the composite adsorption material 8 to prevent microwave leakage.

[0079] The sealing port of the kettle body of the ceramic reaction kettle 1 is outside the microwave heating furnace 3. The flange covers of the ceramic reaction kettle 1 are made of stainless steel and are double - line sealed; the rest of the sealing points all adopt the sealing form of line contact between an arc surface and a plane or between an arc surface and an arc surface. The upper flange cover 4 and the lower flange cover 5 of the ceramic reaction kettle 1 are connected to the kettle body through a sealing gasket. The upper flange cover 4 and the lower flange cover 5 are regular flat covers, and the two are firmly connected by circumferentially uniformly distributed main bolts and nuts. A rubber sealing gasket is placed between the upper flange cover 4, the lower flange cover 5 and the ceramic reaction kettle body; at the same time, a circular cooling water pipe 16 can be arranged inside the kettle body around the sealing gasket, with a cooling water inlet 17 and a cooling water outlet 18 provided, which are used to cool the heat transferred after the composite adsorption material is heated by microwave radiation, so as to improve the service life of the sealing gasket.

[0080] After the upper flange cover 4 and the lower flange cover 5 of the ceramic reaction kettle 1 are firmly connected to the kettle body, an airtight space is formed between the upper flange cover 4, the lower flange cover 5 and the quartz glass adsorption column 2; an anoxic atmosphere can be formed under the condition of vacuum pumping and introducing nitrogen or inert gas.

[0081] The heat exchange pipeline includes a first vent pipe 37, a second vent pipe 38, a first vent port 33, a second vent port 34, a third vent port 35, a fourth vent port 36, a first three-way valve 25, a second three-way valve 26, a third three-way valve 27, a fourth three-way valve 28, and a vacuum pumping system 39.

[0082] It should be noted that according to the treatment volume of organic sewage, three or more groups of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms can also be set up, and multiple groups of mechanisms can be connected in series or parallel.

[0083] According to the moisture content test of the composite adsorbent material, if the heat exchange pipeline is not dried sufficiently, the microwave emission source can be appropriately activated to supplement the heating and drying.

[0084] Embodiment:

[0085] The following combines Figure 2 and Figure 3 to illustrate the process of using the system of the present invention to implement the method.

[0086] Step 1: The first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms adsorb organic sewage;

[0087] The composite adsorbent material 8, which includes 90% granular activated carbon, 8% graphite, and 2% BN, is placed in the quartz glass adsorption column 2, and the partition member 9 is made of quartz wool.

[0088] The two sets of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms in the embodiments of the present invention operate in series. Rotate the first three-way valve 25 to connect the first water / gas pipeline 19 and the first water / gas inlet 21, and disconnect the second air pipeline 38. Rotate the second three-way valve 26 to connect the third water / gas pipeline 29 and the fourth water / gas pipeline 30, and disconnect the first air pipeline 37. Rotate the third three-way valve 27 to connect the fourth water / gas pipeline 30 and the fifth water / gas pipeline 31, and disconnect the sixth water / gas pipeline 32. Rotate the fourth three-way valve 28 to connect the fifth water / gas pipeline 31 and the second water / gas inlet 22, and disconnect the second water / gas pipeline 20. Connect the sixth water / gas pipeline 24 to the vacuum system 39, and start the vacuum system 39 to drive the organic sewage to flow into the microwave ultraviolet carbon fixation and regeneration adsorbent mechanism at a certain flow rate, so that the organic sewage uniformly contacts the adsorption material. The organic sewage flows into the first water / gas pipeline 19, flows through the first three-way valve 25 and into the first water / gas inlet 21, enters the bottom of the composite adsorption material 8 of the first set of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism, flows to the top of the composite adsorption material 8, and then flows out from the first water / gas outlet 23, flows along the third water / gas pipeline 29, through the second three-way valve 26, to the fourth water / gas pipeline 30, through the third three-way valve 27, to the fifth water / gas pipeline 31, through the fourth three-way valve 28, to the second water / gas inlet 22, flows from the bottom of the composite adsorption material 8 of the second set of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism to the top of the composite adsorption material 8, and then flows out from the second water / gas outlet 24 to the buffer tank in the vacuum system 39 and is discharged opportunely after reaching the standard, completing the adsorption and removal process of organic pollutants therein and the enrichment process of the organic matter in the organic sewage by the composite adsorption material 8.

[0089] Step 2: Dry and dehydrate the composite adsorption materials of the first set and the second set of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms;

[0090] Stop evacuating the vacuum and connect the vacuum pumping system 39 to the external atmosphere. Rotate the second three-way valve 26 to connect the third water / gas pipeline 29 and the first ventilation pipe 37, disconnect the fourth water / gas pipeline 30, and utilize the gravity of the retained water in the quartz glass adsorption column 2 to make the retained water in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms flow out from the first water / gas inlet 21 and the first three-way valve 25 through the first water / gas pipeline 19. Rotate the fourth three-way valve 2 to connect the second water / gas inlet 22 and the second water / gas pipeline 20, and the retained water in the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms flows out along the second water / gas inlet 22 through the second water / gas pipeline 20 to complete the preliminary discharge of the organic sewage in the device. Rotate the second three-way valve 26 to connect the third water / gas pipeline 29 and the fourth water / gas pipeline 30, disconnect the first ventilation pipe 37, rotate the third three-way valve 27 to connect the fourth water / gas pipeline 30 and the sixth water / gas pipeline 32, and disconnect the fifth water / gas pipeline 31; rotate the first three-way valve 25 to connect the first water / gas pipeline 19 and the second ventilation pipe 38, and disconnect the first water / gas inlet 21; rotate the fourth three-way valve 28 to connect the fifth water / gas pipeline 31 and the second water / gas pipeline 20, and disconnect the second water / gas inlet 22; start the vacuum pumping system and pump the vacuum degree to 0.01 MPa, start the microwave generator of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms, and heat the composite adsorption material 8 by microwave heating radiation to 50 °C. After the composite adsorption material 8 is completely dehydrated and dried, continue to heat it to 300 °C.

[0091] Step 3: The first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to fix carbon and regenerate the composite adsorption material. After that, utilize the waste heat generated during the first group of carbon fixation and regeneration processes to dry and dehydrate the composite adsorption material of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms; at the same time, reduce the temperature of the composite adsorption material of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms to below 100 °C;

[0092] Maintain a vacuum degree of 0.01 MPa for a certain period of time until the organic matter on the composite adsorption material 8 is completely carbonized and regenerated, and then turn off the microwave emission source.

[0093] Rotate the second three-way valve 26 to connect the first air pipe 37 and the fourth water / gas pipeline 30, disconnect the third water / gas pipeline 29. Rotate the third three-way valve 27 to connect the fourth water / gas pipeline 30 and the fifth water / gas pipeline 31, disconnect the sixth water / gas pipeline 32. Rotate the fourth three-way valve 28 to connect the fifth water / gas pipeline 31 with the second water / gas inlet 22, disconnect the second water / gas pipeline 20. Drive by the vacuum system 39 to flow air from the first air vent 33 into the annular space between the quartz glass adsorption column 2 and the ceramic reaction kettle 1 in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism at a certain flow rate. After heat exchange, the hot air flows out from the second air vent 34, flows along the first air pipe 37 through the second three-way valve 26 to the fourth water / gas pipeline 30, through the third three-way valve 27 to the fifth water / gas pipeline 31, through the fourth three-way valve 28 into the quartz glass adsorption column 2 of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism, and flows out from the second water / gas outlet 24 to the vacuum system 39. Continuously use the hot air to dry the composite adsorbent material 8 in the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism, and complete the cooling of the composite adsorbent material 8 in the quartz glass adsorption column 2 of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism and the drying and dehydration of the composite adsorbent material 8 in the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism.

[0094] Step 4: The first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism adsorbs organic sewage;

[0095] Rotate the first three-way valve 25 to connect the first water / gas pipeline 19 and the first water / gas inlet 21, disconnect the second air pipe 38. Rotate the second three-way valve 26 to connect the third water / gas pipeline 29 and the fourth water / gas pipeline 30, disconnect the first air pipe 37. Rotate the third three-way valve 27 to connect the fourth water / gas pipeline 30 and the sixth water / gas pipeline 32, disconnect the fifth water / gas pipeline 31. Rotate the fourth three-way valve 28 to connect the fifth water / gas pipeline 31 and the second water / gas pipeline 20, disconnect the second water / gas inlet 22. The organic sewage flows into the first water / gas inlet 21 through the first three-way valve 25 from the first water / gas pipeline 19, enters the bottom of the composite adsorbent material 8 in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism and flows to the top of the composite adsorbent material 8, and then flows out from the first water / gas outlet 23, flows along the third water / gas pipeline 29 through the second three-way valve 26 to the fourth water / gas pipeline 30, through the third three-way valve 27 through the sixth water / gas pipeline 32 to the buffer tank in the vacuum system 39 and is discharged opportunely after reaching the standard, completing the adsorption and removal process of organic pollutants therein and the enrichment process of organic matters in the organic sewage by the adsorbent material. Then stop vacuuming, connect the vacuum system 39 with the external atmosphere, and the remaining water in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism flows out from the first water / gas inlet 21 and the first three-way valve 25 through the first water / gas pipeline 19, and the water in the composite adsorbent material 8 in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism is discharged by gravity.

[0096] Step 5: The second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism uses the method of microwave coupled with ultraviolet radiation to fix carbon and regenerate the composite adsorbent material. After that, the waste heat generated during the carbon fixation and regeneration process of the first group is used to dry and dehydrate the composite adsorbent material of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism; at the same time, the temperature of the composite adsorbent material of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism is reduced to below 100 °C.

[0097] Rotate the three-way valve 27 of No. 3 to connect the fourth water / gas pipeline 30 and the fifth water / gas pipeline 31, disconnect the sixth water / gas pipeline 32, rotate the three-way valve 28 of No. 4 to connect the second water / gas pipeline 20 and the fifth water / gas pipeline 31, and disconnect the second water / gas inlet 22. Start the vacuum system, pump the vacuum degree to 0.01 MPa, start the microwave generator of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism, heat and irradiate the composite adsorbent material 8 with microwaves to 300 °C, and keep it for a certain period of time until the organic matter on the composite adsorbent material 8 is completely carbonized and regenerated, then turn off the microwave emission source.

[0098] Rotate the three-way valve 25 of No. 1 to connect the second air pipe 38 and the first water / gas inlet 21, disconnect the first water / gas pipeline 19, rotate the three-way valve 26 of No. 2 to connect the third water / gas pipeline 29 and the fourth water / gas pipeline 30, disconnect the first air pipe 37, rotate the three-way valve 27 of No. 3 to connect the fourth water / gas pipeline 30 and the sixth water / gas pipeline 32, disconnect the fifth water / gas pipeline 31, and use the vacuum system 39 to drive air to flow into the annular space between the quartz glass adsorption column 2 and the ceramic reaction kettle 1 of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism at a certain flow rate. After heat exchange, the hot air flows out from the fourth vent 36, flows along the second air pipe 38 through the three-way valve 25 of No. 1 to the first water / gas inlet 21 and flows into the quartz glass adsorption column 2 of the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism, flows out from the first water / gas outlet 23, flows through the third water / gas pipeline 29 through the three-way valve 26 of No. 2, flows through the fourth water / gas pipeline 30 through the three-way valve 27 of No. 3, and flows through the sixth water / gas pipeline 32, continuously using the hot air to dry the composite adsorbent material 8 in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism. Complete the cooling of the composite adsorbent material 8 in the quartz glass adsorption column 2 of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism and the drying and dehydration of the composite adsorbent material 8 in the first group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism.

[0099] Step 6: The second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism adsorbs organic sewage.

[0100] The four-way three-way valve 28 connects the second water / gas pipeline 20 and the second water / gas inlet 22, disconnects the fifth water / gas pipeline 31, rotates the three-way three-way valve 27 to connect the fourth water / gas pipeline 30 and the fifth water / gas pipeline 31, and disconnects the sixth water / gas pipeline 32. The vacuum pumping system 39 is used to drive the organic sewage to flow from the second water / gas pipeline 20 through the four-way three-way valve 28 into the second water / gas inlet 22, enter the bottom of the composite adsorbent material 8 of the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism, flow to the top of the composite adsorbent material 8, then flow out from the second water / gas outlet 24, flow to the sixth water / gas pipeline 32, and flow to the buffer tank in the vacuum pumping system 39. After reaching the standard, it is discharged at an opportune time, completing the adsorption and removal process of organic pollutants and the enrichment process of the organic matter in the organic sewage by the adsorbent material. Then, stop the vacuum pumping to connect the vacuum pumping system 39 with the external atmosphere, so that the remaining water in the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism flows out from the second water / gas inlet 22 through the second water / gas pipeline 20, and the water in the composite adsorbent material 8 in the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanism is drained by gravity.

[0101] Step 7: Repeat the operations in Step 3 to Step 6 in sequence. The first group and the second group of microwave ultraviolet carbon fixation and regeneration adsorbent mechanisms alternately use the composite adsorbent material for carbon fixation and regeneration to adsorb organic sewage.

[0102] The above is only a preferred specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A microwave ultraviolet carbon fixation and regeneration adsorbent method for sewage treatment, characterized in that it is It is carried out according to the following steps: Step 1: The first group and the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms adsorb organic sewage; Step 2: The composite adsorbent materials of the first group and the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms are dried and dehydrated; Step 3: The first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to fix carbon and regenerate the composite adsorbent materials. After that, the waste heat generated during the carbon-fixing and regeneration process of the first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms is used to dry and dehydrate the composite adsorbent materials of the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms; at the same time, the temperature of the composite adsorbent materials of the first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms is reduced to below 100 °C; Step 4: The first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms adsorb organic sewage; Step 5: The second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to fix carbon and regenerate the composite adsorbent materials. After that, the waste heat generated during the carbon-fixing and regeneration process of the second group is used to dry and dehydrate the composite adsorbent materials of the first group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms; at the same time, the temperature of the composite adsorbent materials of the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms is reduced to below 100 °C; Step 6: The second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms adsorb organic sewage; Step 7: The operations of Step 3 to Step 6 are sequentially repeated, and the first group and the second group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms alternately use the composite adsorbent materials to fix carbon and regenerate and adsorb organic sewage.

2. The method for microwave ultraviolet carbon fixation and regeneration of adsorbent for sewage treatment according to claim 1, characterized in that, The composite adsorbent material is filled by mixing Group A adsorbent material and Group B adsorbent material in different ratios. Group A adsorbent material is one or two of activated carbon and biomass carbon, and Group B adsorbent material is any one or more of graphite, carbon nanotubes, Fe3O4, MnO2, BN, and SiC; wherein the volume ratio of Group A adsorbent material in the composite adsorbent material is 60% - 99%, and the volume ratio of Group B adsorbent material in the composite adsorbent material is 1% - 40%.

3. The method for microwave ultraviolet carbon fixation and regeneration of adsorbent for sewage treatment according to claim 1, characterized in that, Step 3 and Step 5 are carried out under anoxic conditions, and the anoxic conditions are completed by vacuum pumping and introducing nitrogen or inert gas.

4. The method for microwave ultraviolet carbon fixation and regeneration of adsorbent for sewage treatment according to claim 1, characterized in that, In Step 3 and Step 5, the relevant parameters for fixing carbon and regenerating the composite adsorbent material by the method of microwave combined with ultraviolet radiation are: heating the material to 300 °C - 600 °C, and the heating power and reaction time are determined according to the water quality of the organic sewage and the total volume of the composite adsorbent material.

5. A microwave ultraviolet carbon fixation and regeneration adsorbent system for sewage treatment, characterized in that, The system is used to implement the microwave ultraviolet carbon-fixing and regenerating adsorbent method for sewage treatment as described in any one of Claims 1 - 4; the system includes two groups of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms and a heat exchange pipeline; the microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms use the method of microwave coupling ultraviolet radiation to regenerate the composite adsorbent material to resourcefully treat organic sewage; the heat exchange pipeline uses the time difference to provide the waste heat generated during the carbon-fixing and regeneration process of one group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms to the other group of microwave ultraviolet carbon-fixing and regenerating adsorbent mechanisms to dry and dehydrate the composite adsorbent materials.

6. The microwave ultraviolet carbon fixation and regeneration adsorbent system for sewage treatment according to claim 5, wherein, The microwave ultraviolet carbon-fixing and regenerating adsorbent mechanism includes a ceramic reaction kettle, a quartz glass adsorption column, a microwave heating furnace; The ceramic reactor is placed in the microwave heating furnace in an embedded manner; a quartz glass adsorption column is placed inside the ceramic reactor; The quartz glass adsorption column is of a hollow cylindrical structure, and a composite adsorption material is filled in its hollow inner cavity, and partition components are respectively placed at the upper and lower positions of the composite adsorption material; The microwave heating furnace includes a microwave emission source and a microwave heating furnace cavity; An annular space is formed between the ceramic reactor and the quartz glass adsorption column, and several sets of electrodeless ultraviolet lamps are provided in the annular space to provide an ultraviolet light source; an upper air vent is provided between the annular space and the upper flange cover as an air inlet or an air outlet, and a lower air vent is provided between the annular space and the lower flange cover as an air inlet or an air outlet, and the upper air vent and the lower air vent are distributed on both sides of the annular space; The ceramic reactor includes a reactor body, an upper flange cover and a lower flange cover, the upper flange cover is fixedly connected to the water / gas outlet, and the lower flange cover is fixedly connected to the water / gas inlet; after the upper flange cover and the lower flange cover of the ceramic reactor are tightly connected to the reactor body, an airtight space is formed by enclosing between the upper flange cover, the lower flange cover and the quartz glass adsorption column.

7. The microwave ultraviolet carbon-fixing regenerated adsorbent system for sewage treatment according to claim 5, characterized in that, The heat exchange pipeline includes an air pipe, an air vent, a valve and a vacuum pump.

8. The microwave ultraviolet carbon fixation and regeneration adsorbent system for sewage treatment according to claim 6, characterized in that, The partition component is made of a material with high heat resistance and good water permeability.

9. The microwave ultraviolet carbon fixation and regeneration adsorbent system for sewage treatment according to claim 6, characterized in that, A microwave shielding net is placed outside the partition component to shield microwaves.

10. The microwave ultraviolet carbon fixation and regeneration adsorbent system for sewage treatment according to claim 6, wherein, A rubber gasket is placed between the upper flange cover, the lower flange cover and the reactor body of the ceramic reactor, and a circular cooling water pipe is arranged around the gasket to cool the heat transferred after the composite adsorption material is heated by microwave radiation.

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