Catalytic / adsorption regeneration / biodegradation multifunctional controllable reactor

Abstract

The application discloses a catalysis / adsorption regeneration / biodegradation multifunctional controllable reactor, and belongs to the technical field of water treatment.The reactor comprises a reactor shell, a central reaction zone shell, a raw water tank, an H2O2 storage tank and an ozone generator.The multifunctional separation and control of ozone and activated carbon are realized, the function zones are fully utilized and optimized and integrated, the catalytic oxidation capacity, adsorption capacity, synchronous regeneration capacity and biodegradation capacity of the reactor are improved, and the multiple functions are organically combined.The reactor adopts a ring structure and a variable cross-section structure to realize the proportion control of adsorption-biodegradation volume and the variable-speed upward flow effect of mixed fluid, so that the adsorption filter layer is slightly expanded, the water flow resistance is reduced, the blockage is prevented, the reaction time of adsorption / biodegradation is self-consistently distributed according to the reaction type, the adsorption function of activated carbon and the degradation function of biological activated carbon (BAC) are continuously and cooperatively achieved, and the purpose of energy saving and consumption reduction is achieved while the water quality is deeply purified.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water treatment, and particularly relates to a catalysis / adsorption regeneration / biodegradation multifunctional controllable reactor. BACKGROUND

[0002] Ozone-activated carbon (O3-AC) process is widely used in advanced treatment of water supply and wastewater reuse and regeneration. The traditional O3-AC process is composed of ozone contact oxidation and activated carbon adsorption. In the initial stage of operation, the main function of the activated carbon filter layer is adsorption. However, with the extension of operation time, a layer of microorganisms will grow on the surface of activated carbon to form a microbial membrane. The formation of the microbial membrane reduces the effective adsorption area of activated carbon and reduces the adsorption performance. Therefore, after a certain period of operation, the O3-AC process will be converted into an ozone-biological activated carbon (O3-BAC) process. The adsorption capacity of activated carbon is almost lost, and the corresponding biodegradation function is mainly the metabolic function of the surface microbial membrane. However, the biodegradation of microorganisms on the surface of activated carbon is generally lower than the adsorption of the original surface of activated carbon, and the biodegradation is affected by more factors, resulting in a rapid decline in the removal effect of organic matter in water with the extension of operation time. This is the main problem in the application process of O3-AC process. In addition, the oxidation capacity of ozone itself is limited, and the oxidation and decomposition capacity of ozone for some complex large molecular organic matter in water is insufficient, resulting in that a large amount of intermediate products after ozone oxidation are difficult to be further removed by the subsequent activated carbon unit, reducing the use effect of O3-AC process. Thirdly, the ozone oxidation process has a certain regenerative effect on the saturated activated carbon. However, in the traditional O3-AC process, the ozone contact oxidation and the biological activated carbon unit are separately operated, which makes it difficult for ozone to effectively contact with the saturated activated carbon. In addition, the adsorption and biodegradation zones of activated carbon in the traditional process completely overlap, which makes the ozone oxidation regeneration effect difficult to play.

[0003] In view of the above problems, there are currently researches and applications of saturated activated carbon adsorption and regeneration by ozone. The oxidation capacity of ozone is used to promote the adsorption process on the surface of activated carbon by oxidizing and decomposing organic matter, and the ozone enriched on the surface of activated carbon can also oxidize and regenerate the adsorbed organic matter, forming the operation effect of simultaneous adsorption and regeneration of activated carbon. Although the simultaneous adsorption and regeneration of activated carbon by ozone prolongs the adsorption capacity of activated carbon, the surface of activated carbon is difficult to support the growth of microorganisms due to the presence of a certain concentration of ozone in the adsorption zone, so that the biodegradation capacity of activated carbon is difficult to play. This makes the ozone-activated carbon process with only the function of simultaneous adsorption and regeneration not good in treatment effect when there are high amounts of biodegradable substances in water, especially when there are ammonia nitrogen.

[0004] The improved H2O2 / ozone-activated carbon process is also a new process in recent years, which induces the decomposition of O3 by H2O2 to generate ·OH free radicals, the reaction formula is as follows, which improves the ozone oxidation effect and reduces the generation amount of ozone by-product bromate, but H2O2 / ozone produces more various aldehyde intermediates, and these small molecular intermediates have poor adsorption effect due to their hydrophilicity, and if the subsequent biodegradation capacity is insufficient, the H2O2 / ozone-activated carbon process effluent contains a large amount of aldehyde and other polar organic intermediates, which causes the increase of disinfection by-products and other safety risks.

[0005] 2O3 + H2O2 = 2·OH + 3O2 (1)

[0006] At present, improving water quality safety and saving energy are important development directions of water treatment reactors, and the traditional ozone-activated carbon process faces the increasingly complex water source, on the one hand, in terms of water quality safety, it cannot effectively remove some refractory complex organic matter, leading to the generation of disinfection by-products in the effluent; on the other hand, the traditional activated carbon process unit has the problems of rapid reduction of adsorption performance and slow improvement of microbial degradation function, so that the overall performance of the process shows a rapid downward trend with the extension of operation time; thirdly, the traditional ozone-activated carbon process limits the adsorption of activated carbon and the biological degradation function of biofilm in one reaction space, which interferes with each other rather than promotes each other, and the biological degradation reaction is slow and the adsorption speed is fast, so the reaction space of the two cannot be reasonably controlled. Fourth, the traditional ozone-activated carbon process cannot fully stimulate the catalytic oxidation effect of ozone, resulting in relatively low ozone oxidation capacity, which affects the treatment performance of the process. SUMMARY

[0007] The application discloses a kind of catalysis / adsorption regeneration / biodegradation multifunctional controllable reactor, to solve the problems of existing traditional ozone-activated carbon process, such as low ozone oxidation performance, activated carbon adsorption and biodegradation function mutual influence, adsorption performance decline, biodegradation function cannot be fully played and the like. By changing the structure of reactor and internal correlation mode, the functions of ozone and activated carbon are separated and controlled, fully utilized, and the effects of optimization and integration are realized. The catalytic oxidation capacity, adsorption capacity and biodegradation capacity of the process are improved, and the catalytic oxidation and synchronous regeneration effects are achieved by using H2O2 / O3 synergistic reaction. Various functions are organically combined.

[0008] To achieve the above object, the technical scheme of the application is:

[0009] A catalytic / adsorption regeneration / biodegradation multifunctional controllable reactor, comprising a reactor outer shell, a central reaction zone shell, a raw water tank, an H2O2 storage tank, and an ozone generator; the central reaction zone shell is coaxially arranged inside the reactor outer shell, the central reaction zone shell is filled with activated carbon filter material and forms a variable-speed upward flow synchronous regeneration adsorption zone; a biological activated carbon is filled between the upper part of the outer surface of the central reaction zone shell and the upper part of the inner surface of the reactor outer shell, and forms a biological activated carbon degradation zone; a plurality of uniformly radiated water distribution tanks are connected between the top of the biological activated carbon degradation zone and the top of the outer wall of the central reaction zone shell; the lower part of the biological activated carbon degradation zone is connected with a water outlet collection area, a catalytic reaction zone is arranged below the central reaction zone shell and inside the reactor outer shell, the raw water tank is connected with a mixing area in the catalytic reaction zone through a total water inlet pipe, the H2O2 storage tank is connected with a Venturi mixer on the total water inlet pipe through an H2O2 dosing pipe, and the ozone generator is connected with the mixing area through a catalytic reaction ozone pipe penetrating through the central reaction zone shell.

[0010] Preferably, the central reaction zone shell comprises a first cylindrical shell at the upper part and a first circular truncated cone shell at the lower part, the small-diameter end edge of the first circular truncated cone shell is sealingly and fixedly connected with the bottom end edge of the first cylindrical shell, and the bottom end of the first circular truncated cone shell is provided with a perforated water distribution plate; the mixed water supply enters the first cylindrical shell through the first circular truncated cone shell, due to the effect of diameter reduction, the upward flow speed of the water supply is accelerated, and the activated carbon micropores or gaps in the first cylindrical shell are slightly expanded; the ozone generator also performs synchronous regeneration on the activated carbon through an ozone regeneration ring pipe entering the central reaction zone shell, and the ozone regeneration ring pipe is uniformly provided with gas outlets.

[0011] Preferably, the reactor outer shell comprises a second cylindrical shell at the upper part and a second circular truncated cone shell at the lower part, the large-diameter end edge of the second circular truncated cone shell is sealingly and fixedly connected with the bottom end edge of the second cylindrical shell, the height of the top end of the second cylindrical shell is higher than that of the top end of the first cylindrical shell, the biological activated carbon degradation zone is an annular area arranged between the first cylindrical shell and the second cylindrical shell, the bottom end of the annular area is connected with a water collection support plate, a plurality of water collection caps are uniformly distributed on the water collection support plate, the inner edge and the outer edge of the water collection support plate are sealingly and fixedly connected with the outer wall bottom of the first cylindrical shell and the inner wall bottom of the second cylindrical shell respectively, and the biological activated carbon is granular activated carbon with a biological membrane.

[0012] Preferably, the water distribution tank has 8, the top of the outer wall of the central reaction zone shell is provided with a water outlet connected with the water distribution tank, and the top of the two side walls of the water distribution tank is provided with uniformly distributed triangular weirs.

[0013] Preferably, the large diameter end edge of the first circular truncated cone-shaped shell is sealingly and fixedly connected with the middle part of the inner surface of the second circular truncated cone-shaped shell, forming a catalytic reaction zone between the perforated water distribution plate and the bottom end of the second circular truncated cone-shaped shell, and forming a water outlet collection zone between the outer wall of the first circular truncated cone-shaped shell and the inner wall of the second circular truncated cone-shaped shell.

[0014] Preferably, the catalytic reaction zone comprises a first catalytic reaction zone located in the middle part and a second catalytic reaction zone located in the periphery of the first catalytic reaction zone, and the upper part of the first catalytic reaction zone is provided with a mixing zone.

[0015] Preferably, the first catalytic reaction zone comprises a conical shell, the bottom end of the conical shell is sealingly and fixedly connected with the bottom end of the second circular truncated cone-shaped shell, the upper part in the conical shell constitutes the mixing zone, the bottom part in the mixing zone is connected with the inner wall of the conical shell through a partition plate, a plurality of water passing holes are uniformly arranged on the bottom part of the conical shell and the partition plate respectively, and the mixing zone is filled with spherical hollow fillers.

[0016] Preferably, the water outlet collection zone is coaxially provided with a ring-shaped perforated water collection and distribution pipe, the outer wall of the ring-shaped perforated water collection and distribution pipe is uniformly provided with water permeable holes, the ring-shaped perforated water collection and distribution pipe is connected with a water outlet pipe penetrating through the outer wall of the second circular truncated cone-shaped shell, and the water outlet pipe is connected with a water purification tank.

[0017] Preferably, the backwashing mechanism comprises a backwashing water inlet pipe connected with the total water inlet pipe, one end of the backwashing water inlet pipe is connected with the ring-shaped perforated water collection and distribution pipe, the upper part of the outer wall of the second circular cylindrical shell is further provided with a ring-shaped water tank, the ring-shaped water tank is in communication with the inside of the reactor outer shell above the biological activated carbon degradation zone through a connecting pipe, and the bottom part of the ring-shaped water tank is connected with a backwashing water outlet pipe.

[0018] Preferably, the control mechanism comprises a controller, a water inlet pressurizing pump arranged on the total water inlet pipe, an H2O2 dosing pump arranged on the H2O2 dosing pipe, a catalytic oxidation ozone flow adjusting meter arranged on the catalytic reaction ozone pipe, and a regeneration ozone flow adjusting meter arranged on the regeneration ozone pipe, the speed of inputting raw water and H2O2 solution into the mixer is controlled by controlling the water inlet pressurizing pump and the H2O2 dosing pump, and the amount of ozone added into the mixing zone and the amount of ozone added into the variable-speed upward flow synchronous regeneration adsorption zone are controlled by controlling the catalytic oxidation ozone flow adjusting meter and the regeneration ozone flow adjusting meter.

[0019] The catalytic / adsorption regeneration / biological degradation multifunctional controllable reactor has the following advantages:

[0020] (1) The present application adopts a ring reactor structure, reasonably separates adsorption and biodegradation reaction zones, and can scientifically and reasonably adjust the volume ratio of adsorption and biodegradation reaction zones by using the volume ratio characteristics of the ring space. As shown in Figure 1 Because the adsorption reaction speed is fast, the adsorption reaction zone is arranged in the center of the reactor and has a relatively small volume, while the biodegradation reaction speed is slow, so the biodegradation reaction zone is arranged in the outer ring and has a relatively large volume, which is beneficial to the improvement of the biodegradation effect. The two zones are connected through an open water distribution tank, which is beneficial to the overflow of the remaining ozone in the water distribution tank and the improvement of the dissolved oxygen concentration. Meanwhile, the present application effectively controls the excess ozone in the variable-speed synchronous regeneration adsorption zone through a control mechanism, so that the negative influence of activated carbon adsorption on biodegradation can be avoided, and the efficiency of activated carbon adsorption and biodegradation can be maximized.

[0021] (2) The present application effectively combines ozone oxidation and activated carbon adsorption zones in the center part of the reactor to form a synchronous regeneration activated carbon adsorption reaction zone. The decomposition of macromolecular organic matter by ozone promotes the adsorption effect of activated carbon. Meanwhile, ozone can further react with the organic matter on the surface of the saturated activated carbon to restore the adsorption active sites, so that synchronous regeneration is realized. In this process, ozone is generated from the bottom-up ozone aeration process, so that ozone is mainly used for oxidation reaction with organic matter in the lowermost part. When ozone rises through the activated carbon layer, it plays a role in synchronous oxidation regeneration of activated carbon. Ozone can be fully utilized after passing through the entire activated carbon layer, which greatly reduces the amount of remaining ozone, reduces the treatment cost of ozone tail gas, improves the utilization efficiency of ozone, and achieves the effect of energy saving and consumption reduction.

[0022] (3) In the catalytic reaction zone, the mixer can fully mix ozone and water containing H2O2. By using the principle that H2O2 and ozone can excite ·OH, the oxidation performance of ozone can be improved, and the increasingly emerging trace organic matter in water can be efficiently oxidized and removed. Meanwhile, the intermediate products after H2O2 / O3 catalytic oxidation are more conducive to the adsorption of activated carbon and the degradation of subsequent microorganisms. Therefore, the present application can generally improve the removal efficiency of organic matter in raw water.

[0023] (4) The synchronous adsorption regeneration area of the present application adopts an innovative design of variable cross-section upward flow. By using the increasing water flow speed, the adsorption bed is slightly expanded, the water flow resistance is reduced, and the probability of blockage is reduced, which is beneficial to energy saving and consumption reduction. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The present application is a cross-sectional structure schematic diagram.

[0025] Figure 2 The present application is a top view of the reactor shell at the top.

[0026] Figure 3 The plan view of the water collecting support plate cooperating with the reactor outer shell and the central reaction zone shell;

[0027] Figure 4 The plan view of the perforated water distribution plate cooperating with the annular perforated water collecting and distributing pipe;

[0028] Figure 5 The processing effect diagram of TOC;

[0029] Figure 6 The processing effect diagram of COD Mn ;

[0030] The figure mark: 1, raw water tank; 2, H2O2 storage tank; 3, reactor outer shell; 4, ozone generator; 5, central reaction zone shell; 6, Venturi mixer; 7, total water inlet pipe; 7a, total water inlet pipe valve; 8, mixing zone; 8a, spherical hollow filler; 9, first catalytic reaction zone; 9a, water passage; 10, flow guide plate; 11, second catalytic reaction zone; 12, perforated water distribution plate; 13, annular perforated water collecting and distributing pipe; 14, water collecting support plate; 14a, water collecting cap; 15, biological activated carbon degradation zone; 15a, biological activated carbon; 16, water outlet pipe; 16a, water outlet pipe valve; 17, variable cross-section adsorption zone in the first circular truncated cone shell; 18, adsorption zone in the first cylindrical shell; 18a, activated carbon filter material; 19, backwashing water outlet pipeline; 19a, backwashing water outlet pipeline valve; 20, water distribution tank; 21, annular water tank; 22, ozone regeneration ring pipe; 23, H2O2 dosing pipe; 23a, H2O2 dosing pipe valve; 24, water inlet pressurizing pump; 25, regeneration ozone pipe; 26, catalytic reaction ozone pipe; 27, catalytic oxidation ozone flow regulating meter; 27a, catalytic oxidation ozone pipe valve; 28, regeneration ozone flow regulating meter; 28a, regeneration ozone pipe valve; 29, H2O2 dosing pump; 30, controller; 31, backwashing water inlet pipeline; 31a, backwashing water inlet pipeline valve. DETAILED DESCRIPTION

[0031] The following description is only the preferred embodiment of the present application, and is not used to limit the protection scope of the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

[0032] The following examples can be understood as a part of expressing the partial structure or method of the present application, and can also be understood as the mutual combination of the examples to explain the larger range of structure or method connotation of the present application.

[0033] Example 1

[0034] A catalytic / adsorption regeneration / biodegradation multifunctional controllable reactor, as shown in Figures 1-4 The reactor comprises a reactor outer shell 3, a central reaction zone shell 5, a raw water tank 1, an H2O2 storage tank 2, and an ozone generator 4. The central reaction zone shell 5 is coaxially arranged inside the reactor outer shell 3, and the central reaction zone shell 5 is filled with activated carbon filter material 18a and forms a variable-speed upward-flowing synchronous regeneration adsorption zone. A biologically active carbon 15a is filled between the upper part of the outer surface of the central reaction zone shell 5 and the upper part of the inner surface of the reactor outer shell 3, and forms a biologically active carbon degradation zone 15. A plurality of uniformly radiating water distribution tanks 20 are connected between the top of the biologically active carbon degradation zone 15 and the top of the outer wall of the central reaction zone shell 5. The biologically active carbon degradation zone 15 is connected with a water outlet collection zone at the lower part. A catalytic reaction zone is arranged below the central reaction zone shell 5 and inside the reactor outer shell 3. The raw water tank 1 is connected with a mixing zone 8 in the catalytic reaction zone through a total water inlet pipe 7. The H2O2 storage tank 2 is connected with the total water inlet pipe 7 through an H2O2 dosing pipe 23 and a Venturi mixer 6. The ozone generator 4 is connected with the mixing zone 8 through a catalytic reaction ozone pipe 26 passing through the central reaction zone shell 5.

[0035] Example 2

[0036] As shown in Figures 1-4 The central reaction zone shell 5 comprises a first cylindrical shell at the upper part and a first circular truncated cone shell at the lower part. The small-diameter end edge of the first circular truncated cone shell is sealingly and fixedly connected with the bottom end edge of the first cylindrical shell. The bottom end of the first circular truncated cone shell is provided with a perforated water distribution plate 12. The mixed water supply enters the first cylindrical shell through the first circular truncated cone shell. Due to the effect of diameter reduction, the upward flow speed of the water supply is accelerated, and the activated carbon micropores or gaps in the first cylindrical shell are slightly expanded. The ozone generator 4 also performs synchronous regeneration of the activated carbon through an ozone regeneration ring pipe 22 entering the central reaction zone shell 5. The ozone regeneration ring pipe 22 is uniformly provided with gas outlet holes.

[0037] As shown in Figures 1-4As shown, the reactor outer shell 3 includes a second cylindrical shell at the upper part and a second circular truncated cone shell at the lower part, the large diameter end edge of the second circular truncated cone shell is sealingly and fixedly connected with the bottom end edge of the second cylindrical shell, the height of the top end of the second cylindrical shell is higher than the height of the top end of the first cylindrical shell, the biological activated carbon degradation zone 15 is an annular area provided between the first cylindrical shell and the second cylindrical shell, the bottom end of the annular area is connected with a water collecting support plate 14, the water collecting support plate 14 is uniformly distributed with a plurality of water collecting caps 14a, the inner edge and the outer edge of the water collecting support plate 14 are sealingly and fixedly connected with the bottom of the outer wall of the first cylindrical shell and the bottom of the inner wall of the second cylindrical shell respectively, and the biological activated carbon 15a is a granular activated carbon with a biological membrane.

[0038] Example 3

[0039] As shown in Figure 1 , 2 , the water distribution tank 20 has 8, the top of the outer wall of the central reaction zone shell 5 is provided with a water outlet connected with the water distribution tank 20, and the top of the two side walls of the water distribution tank 20 is provided with uniformly distributed triangular weirs.

[0040] As shown in Figure 1 , the large diameter end edge of the first circular truncated cone shell is sealingly and fixedly connected with the middle part of the inner surface of the second circular truncated cone shell, the catalytic reaction zone is formed between the perforated water distribution plate 12 and the bottom end of the second circular truncated cone shell, and the water outlet water collecting area is formed between the outer wall of the first circular truncated cone shell and the inner wall of the second circular truncated cone shell.

[0041] Example 4

[0042] As shown in Figure 1 , the catalytic reaction zone includes a first catalytic reaction zone 9 at the middle part and a second catalytic reaction zone 11 at the periphery of the first catalytic reaction zone 9, and the upper part of the first catalytic reaction zone 9 is provided with a mixing zone 8.

[0043] Example 5

[0044] As shown in Figure 1 , the first catalytic reaction zone 9 includes a conical shell, the bottom end of the conical shell is sealingly and fixedly connected with the bottom end of the second circular truncated cone shell, the upper part in the conical shell constitutes the mixing zone 8, the inner bottom of the mixing zone 8 is connected with the inner wall of the conical shell through a partition plate, a plurality of water passing holes 9a are uniformly arranged on the bottom of the conical shell and the partition plate respectively, and the mixing zone 8 is filled with spherical hollow fillers 8a.

[0045] Example 6

[0046] As shown in Figure 1 , 4As shown, an annular perforated water distribution pipe 13 is coaxially arranged in the water collection area. The annular perforated water distribution pipe 13 has water permeable holes evenly distributed on its outer wall. The annular perforated water distribution pipe 13 is connected to a water outlet pipe 16 that penetrates the outer wall of the second frustum-shaped shell. The water outlet pipe 16 is connected to the purified water tank.

[0047] Example 7

[0048] like Figure 1 As shown, it also includes a backwashing mechanism, which includes a backwashing inlet pipe 31 connected to the main inlet pipe 7. One end of the backwashing inlet pipe 31 is connected to the annular perforated distribution pipe 13. The upper part of the outer wall of the second cylindrical shell is also provided with an annular water tank 21. The annular water tank 21 is connected to the inside of the reactor shell 3 above the bio-activated carbon degradation zone 15 through a connecting pipe. The bottom of the annular water tank 21 is connected to a backwashing outlet pipe 19.

[0049] Example 8

[0050] like Figure 1 As shown, it also includes a control mechanism, which includes a controller 30, an inlet water pressurization pump 24 installed on the main inlet water pipe, an H2O2 dosing pump 29 installed on the H2O2 dosing pipe, a catalytic oxidation ozone flow regulator 27 installed on the catalytic reaction ozone pipe 26, and a regeneration ozone flow regulator 28 installed on the regeneration ozone pipe 25. The inlet water pressurization pump and the H2O2 dosing pump control the rate at which raw water and H2O2 solution are input into the mixer; the catalytic oxidation ozone flow regulator 27 and the regeneration ozone flow regulator 28 control the amount of ozone added to the mixing zone and the amount of ozone added to the variable speed upward flow synchronous regeneration adsorption zone.

[0051] The specific operation process is as follows:

[0052] The operation process of this invention is divided into:

[0053] (1) Water intake operation process:

[0054] During normal operation, the backwashing system is closed, i.e., the main inlet valve 7a, the outlet valve 16a, the H2O2 dosing valve 23a, and the catalytic oxidation ozone valve 27a are opened, while the backwash inlet valve 31a and the backwash outlet valve 19a are closed.

[0055] (2) Backwashing process of the bio-activated carbon degradation zone (once a week)

[0056] In the backwashing process of the biological activated carbon degradation zone, the water inlet, H2O2 agent and catalytic oxidation ozone supply are stopped, i.e. the total water inlet pipe valve 7a, the water outlet pipe valve 16a, the H2O2 agent pipe valve 23a and the catalytic oxidation ozone pipe valve 27a are closed, and the backwashing water inlet pipe valve 31a and the backwashing water outlet pipe valve 19a are opened, and the others remain unchanged.

[0057] In the normal operation of the present application, the raw water to be treated is fed into the total water inlet pipe 7, the ozone is filled into the mixing zone through the catalytic reaction ozone pipe 26, and the raw water in the total water inlet pipe is mixed with the H2O2 liquid through the Venturi mixer 6, and the mixed raw water enters the mixing zone, under the impact of the ozone flow and the raw water flow, the spherical hollow filler moves irregularly and collides, promoting the full mixing of ozone and raw water, after the mixed liquid passes through the catalytic oxidation reaction of the first catalytic reaction zone, it enters the second catalytic reaction zone through the water hole, and further completes the catalytic oxidation reaction, and then enters the variable cross-section adsorption zone 17 in the first circular truncated cone shell and the adsorption zone 18 in the first circular cylindrical shell in sequence through the perforated water distribution plate 12 and flows upward, and the adsorbed water is uniformly distributed into the biological activated carbon degradation zone through the water distribution tank. Finally, the water treated in the biological activated carbon degradation zone is discharged from the water collection support plate 14 into the water outlet collection zone, discharged into the water outlet pipe 16 through the annular perforated water collection and distribution pipe, and then discharged into the clean water tank or other designated container through the water outlet pipe 16. Among them, the catalytic reaction of ozone and water containing H2O2 is completed when the water is mixed, ·OH free radicals are generated by exciting ozone through H2O2, and catalytic oxidation reaction is carried out on organic matter in water by ozone, so that large molecular organic matter and refractory organic matter are oxidized and decomposed into small molecular organic matter which is easy to be biologically oxidized, and the removal efficiency of subsequent adsorption and biological degradation is promoted. The gas-water mixed liquid after catalytic reaction is uniformly distributed at the bottom of the upward flow synchronous regeneration adsorption zone, and water is distributed from the catalytic reaction zone to the upward flow synchronous regeneration adsorption zone.

[0058] The upflow synchronous regeneration adsorption zone of the application is located in the central region of the reactor, and is surrounded by the biological activated carbon degradation zone on the outside. The lower part of the upflow synchronous regeneration adsorption zone is tapered upward, and the upper part is a first cylindrical shell. Since the flow rate of the influent is constant, the cross-sectional area decreases, and according to the formula Q=A·υ, the water flow velocity gradually increases. The micropores or gaps of the activated carbon filter material in this region expand due to the buoyancy or impact force of the water, which is beneficial to the uniform flow of the gas-water mixture in the activated carbon pores in the filter layer, avoiding the formation of air pockets. At the same time, the filter layer is in an expanded state, and is not prone to accumulate impurities and form local blockage, so the filter layer has small resistance, and the gas, solid and liquid are fully contacted. Synchronous regeneration refers to the control of the amount of ozone in the upflow synchronous regeneration adsorption zone. The amount of ozone in the variable-speed synchronous regeneration adsorption zone is always in excess, and the excess ozone contacts the activated carbon filter material in the upper part to form a synchronous regeneration process. The particle size of the activated carbon particles filled in the variable-speed synchronous regeneration adsorption zone can be selected from 1-2 mm and 2-4 mm.

[0059] The width of the biological activated carbon degradation zone and the diameter of the variable-speed synchronous regeneration adsorption zone can be adjusted as needed to form different adsorption / biological degradation residence time ratios. The region is filled with granular activated carbon with a biological membrane to form biological activated carbon (BAC). The biological activated carbon uses the surface microbial degradation effect to further biodegrade trace organic matter after ozone oxidation. Since the pre-oxidation of ozone can decompose large molecules and refractory organic matter into easily degradable small molecule organic matter, the trace organic components in the water can be more effectively removed in this region. Among them, the biological activated carbon uses introduced mature biological granular activated carbon or inoculated and cultured granular activated carbon.

[0060] The biological activated carbon filter layer needs to be backwashed once a week. The backwashing steps are as described above. Raw water enters the annular perforated water distribution pipe at the lower part of the biological activated carbon degradation zone through the backwashing influent pipeline, and is then uniformly distributed to the lower part of the water collection support plate 14. Under the action of the upward flow of water, the trapped impurities in the filter layer are backwashed.

[0061] The control mechanism controls the dosing speed of raw water and H2O2 solution, the ozone flow of catalytic reaction, and the ozone flow for activated carbon regeneration, which can ensure the effect of activated carbon regeneration and catalytic oxidation reaction, and can also avoid excessive ozone entering the biological activated carbon degradation zone. In addition, during the process of flowing into the biological activated carbon degradation zone through the water distribution tank after being treated by activated carbon adsorption, the excess ozone can be fully volatilized into the air, which is beneficial to bringing oxygen into the biological activated carbon degradation zone, and maximizes the efficiency of activated carbon adsorption and biological degradation.

[0062] Experimental example

[0063] By using the present application to carry out advanced treatment on the effluent of a sedimentation tank of a certain waterworks, the removal effects of the reactor of the present application and the conventional ozone-activated carbon process on COD Mn and TOC are compared, and the running time is 1 month. The experimental results are shown in Figure 5 , 6 It can be seen that the reactor of the present application has very good removal effects on the two indexes in water, and the effect is obviously better than that of the conventional ozone-activated carbon reactor.

Claims

1. A multifunctional controllable reactor with catalysis / adsorption regeneration / biodegradation, characterized by comprising a reactor outer shell, a central reaction zone shell, a raw water tank, an H2O2 storage tank, and an ozone generator; the central reaction zone shell is coaxially arranged inside the reactor outer shell, and is filled with activated carbon filter material to form a variable-speed upward-flowing synchronous regeneration adsorption zone; a bio-activated carbon is filled between the upper part of the outer surface of the central reaction zone shell and the upper part of the inner surface of the reactor outer shell to form a bio-activated carbon degradation zone; a plurality of water distribution tanks are connected between the top of the bio-activated carbon degradation zone and the top of the outer wall of the central reaction zone shell; the lower part of the bio-activated carbon degradation zone is connected with a water outlet collection area, a catalytic reaction zone is arranged below the central reaction zone shell and inside the reactor outer shell, the raw water tank is connected with a mixing area in the catalytic reaction zone through a total water inlet pipe, the H2O2 storage tank is connected with a Venturi mixer on the total water inlet pipe through an H2O2 dosing pipe, and the ozone generator is connected with the mixing area through a catalytic reaction ozone pipe penetrating through the central reaction zone shell. The central reaction zone shell comprises a first cylindrical shell at the upper part and a first circular truncated cone shell at the lower part, the small-diameter end edge of the first circular truncated cone shell is sealingly and fixedly connected with the bottom end edge of the first cylindrical shell, and the bottom end of the first circular truncated cone shell is provided with a perforated water distribution plate; the mixed water supply enters the first cylindrical shell through the first circular truncated cone shell, and due to the effect of diameter reduction, the upward flow speed of the water supply is accelerated, and the micro-pores or gaps of the activated carbon in the first cylindrical shell are slightly expanded; the ozone generator also performs synchronous regeneration on the activated carbon through an ozone regeneration ring pipe entering the central reaction zone shell, and the ozone regeneration ring pipe is uniformly provided with gas outlets; The reactor outer shell comprises a second cylindrical shell at the upper part and a second circular truncated cone shell at the lower part, the large-diameter end edge of the second circular truncated cone shell is sealingly and fixedly connected with the bottom end edge of the second cylindrical shell, the height of the top end of the second cylindrical shell is higher than that of the top end of the first cylindrical shell, the bio-activated carbon degradation zone is an annular area arranged between the first cylindrical shell and the second cylindrical shell, the bottom end of the annular area is connected with a water collection support plate, a plurality of water collection caps are uniformly distributed on the water collection support plate, the inner edge and the outer edge of the water collection support plate are sealingly and fixedly connected with the outer wall bottom of the first cylindrical shell and the inner wall bottom of the second cylindrical shell respectively, and the bio-activated carbon is granular activated carbon with a biofilm; The large-diameter end edge of the first circular truncated cone shell is sealingly and fixedly connected with the middle part of the inner surface of the second circular truncated cone shell, a catalytic reaction zone is formed between the perforated water distribution plate and the bottom end of the second circular truncated cone shell, and a water outlet collection area is formed between the outer wall of the first circular truncated cone shell and the inner wall of the second circular truncated cone shell; The catalytic reaction zone comprises a first catalytic reaction zone at the middle part and a second catalytic reaction zone at the periphery of the first catalytic reaction zone, and the upper part of the first catalytic reaction zone is provided with a mixing area. The first catalytic reaction zone comprises a conical shell, the bottom end of which is fixedly connected with the bottom end of the second circular frustum shell, the upper part of the conical shell constitutes a mixing zone, the bottom of the mixing zone is connected with the inner wall of the conical shell through a partition plate, the bottom of the conical shell and the partition plate are uniformly provided with a plurality of water passing holes, and the mixing zone is filled with spherical hollow fillers.

2. The catalytic / adsorptive regenerative / biodegradation multifunctional controllable reactor according to claim 1, characterized in that: The water distribution grooves are eight in number, the top of the outer wall of the central reaction zone shell is provided with water outlets connected with the water distribution grooves, and the top of the two side walls of the water distribution grooves is provided with uniformly distributed triangular weirs.

3. The catalytic / adsorption regeneration / biodegradation multifunctional controllable reactor according to claim 2, characterized in that the water outlet collecting zone is coaxially provided with a ring-shaped perforated water collecting and distributing pipe, the outer wall of the ring-shaped perforated water collecting and distributing pipe is uniformly provided with water permeable holes, the ring-shaped perforated water collecting and distributing pipe is connected with a water outlet pipe penetrating through the outer wall of the second circular frustum shell, and the water outlet pipe is connected with a water purification tank.

4. The catalytic / adsorptive regenerative / biodegradation multifunctional controllable reactor according to claim 3, characterized in that: The backwashing mechanism is further provided, the backwashing mechanism comprises a backwashing water inlet pipe connected with the total water inlet pipe, one end of the backwashing water inlet pipe is connected with the ring-shaped perforated water collecting and distributing pipe, the upper part of the outer wall of the second circular cylindrical shell is further provided with a ring-shaped water groove, the ring-shaped water groove is connected with the inside of the reactor outer shell above the biologically active carbon degradation zone through a connecting pipe, and the bottom of the ring-shaped water groove is connected with a backwashing water outlet pipe.

5. The catalytic / adsorption regeneration / biodegradation multifunctional controllable reactor according to claim 4, characterized in that the control mechanism is further provided, the control mechanism comprises a controller, a water inlet pressurizing pump arranged on the total water inlet pipe, an H2O2 dosing pump arranged on the H2O2 dosing pipe, a catalytic oxidation ozone flow regulating meter arranged on the catalytic reaction ozone pipe, and a regeneration ozone flow regulating meter arranged on the regeneration ozone pipe; the speed of inputting raw water and H2O2 solution into the mixer is controlled through the control of the water inlet pressurizing pump and the H2O2 dosing pump; the amount of ozone added into the mixing zone and the amount of ozone added into the variable-speed upward-flow synchronous regeneration adsorption zone are controlled through the control of the catalytic oxidation ozone flow regulating meter and the regeneration ozone flow regulating meter.

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