Variable-speed up-flow hydrolytic acidification reactor

Abstract

The utility model relates to a variable-speed up-flow hydrolytic acidification reactor which is characterized in that a hydrolytic acidification main reactor is internally divided into a water distribution layer, a sludge layer, a suspension layer, a filler layer and a clear water layer in sequence from bottom to top, a vertical pipe is arranged in the hydrolytic acidification main reactor, and the lower end of the vertical pipe extends into the water distribution layer and is communicated with an inlet of a same-pass water distribution pipe in the water distribution layer; the upper end of the vertical pipe is communicated with the outlet of the pulse water distributor, the vertical pipe is communicated with the water inlet, and the circulating treatment pump is used for pumping suspension layer sewage into the pulse water distributor. The device has the beneficial effects that the same one-way water distribution pipe is adopted for the first-time water distribution and the second-time water distribution for same-way uniform water distribution, so that the water distribution uniformity is improved, the sewage concentration in a core reaction area in a reaction system is uniform or is uniformly mixed, the reaction process in the reaction system is enhanced, and the reaction efficiency is improved. Sludge and florae of characteristic strains are screened through a reaction system with high and low flow speeds changing periodically, the microenvironment around the microflora is discontinuously destroyed, the reaction is accelerated, and the reaction speed is increased.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, specifically to a variable speed upflow hydrolysis acidification reactor. Background Technology

[0002] Hydrolysis acidification reactors are widely used wastewater treatment technologies in municipal and industrial wastewater treatment processes. The working principle of the hydrolysis acidification tank is mainly based on the action of anaerobic microorganisms, which treat wastewater through two stages: hydrolysis and acidification.

[0003] Hydrolysis mainly utilizes the extracellular free enzymes or fixed enzymes released by anaerobic microorganisms (mainly hydrolytic bacteria and acid-producing bacteria) in the hydrolysis acidification tank. These enzymes can catalyze the biochemical reactions of non-dissolved organic matter in wastewater, transforming it into dissolved organic matter. At the same time, under the action of hydrolytic bacteria, large molecular organic matter (such as proteins, fats, carbohydrates, etc.) in wastewater is decomposed into small molecular organic matter (such as amino acids, fatty acids, sugars, etc.), which are more easily absorbed and utilized by microorganisms.

[0004] The acidification stage is mainly carried out by acid-producing bacteria. The small molecule organic matter produced in the hydrolysis stage will be further fermented to produce various organic acids (such as acetic acid, propionic acid, butyric acid, etc.). This process will lower the pH value of the wastewater and complete the acidification process. The organic acids produced can be used as nutrients by microorganisms in the subsequent biological treatment process to further remove organic matter from the wastewater.

[0005] This type of reaction equipment can effectively improve the biodegradability of wastewater. At the same time, because the system sludge has a high resistance to the impact of influent load, it can effectively buffer the impact of high-concentration wastewater. The system has already partially degraded organic matter, which can effectively reduce the sludge generated in subsequent treatment processes.

[0006] Conventional hydrolysis acidification tanks are arranged in an upflow pattern. Hydrolysis acidification microorganisms and suspended solids form a sludge layer. Wastewater rises evenly from the bottom of the reaction tank to the top effluent weir through a water distribution device and is discharged. Packing material can also be added to the upflow hydrolysis acidification tank to improve the wastewater treatment effect.

[0007] The main challenges of conventional hydrolysis acidification tanks are the inability to effectively control the uniformity of the influent, the high concentration of wastewater in some areas of the core reaction zone, the inability to create favorable reaction conditions, and the limited means of process control, making it impossible to monitor and regulate the reaction process in the system in real time. Utility Model Content

[0008] The technical problem to be solved by this utility model is to provide a variable speed upflow hydrolysis acidification reactor to solve the problems of poor water quality uniformity in the core reaction zone and insufficient reaction monitoring and regulation capabilities of existing hydrolysis acidification reactors.

[0009] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0010] A variable-speed upflow hydrolysis acidification reactor includes: a main hydrolysis acidification reactor and a circulating treatment pump. The main hydrolysis acidification reactor is divided into a water distribution layer, a sludge layer, a suspended layer, a packing layer and a clear water layer from bottom to top. A vertical pipe is arranged in the main hydrolysis acidification reactor. The lower end of the vertical pipe extends into the water distribution layer and is connected to the inlet of the same-path water distribution pipe in the water distribution layer. The upper end of the vertical pipe is connected to the outlet of the pulse water distributor. The main hydrolysis acidification reactor is provided with an inlet connected to the vertical pipe. The circulating treatment pump is used to draw sewage from the suspended layer and send it into the pulse water distributor.

[0011] The beneficial effects of this utility model are:

[0012] During operation, upstream water first enters the vertical pipe through the inlet, then enters the same-path water distribution pipe through the vertical pipe, and finally is distributed into the water distribution layer through the same-path water distribution pipe, thus achieving the first water distribution. At the same time, the circulating treatment pump can send the suspended wastewater into the pulse water distributor. After the pulse water distributor completes a single pulse, the wastewater enters the same-path water distribution pipe through the vertical pipe, and then is distributed into the water distribution layer again through the same-path water distribution pipe, thus achieving the second water distribution.

[0013] The second water distribution adopts circulating water distribution, and the first and second water distribution use the same parallel water distribution pipe to distribute water evenly, increasing the uniformity of water distribution and making the wastewater concentration in the core reaction zone of the reaction system uniform or uniformly mixed, thus strengthening the reaction process in the reaction system. By adjusting the working parameters of the circulating treatment pump, the pulse period can be adjusted to achieve variable speed water distribution, and the water distribution system can achieve self-cleaning through periodic short-term high flow rate conditions, reducing pipe blockage.

[0014] The upward flow velocity in the hydrolysis acidification main reactor can achieve a periodic change of "low flow velocity - high flow velocity - low flow velocity - high flow velocity". By using the reaction system with periodic changes in high and low flow velocities, characteristic strains of sludge and microbial communities can be screened, that is, microbial communities with specific degradation performance can be screened, and the required characteristic microbial communities can be transformed into dominant microbial communities in the system, that is, a dominant living environment for the target microbial communities can be formed. The reaction can be accelerated by intermittently disrupting the microenvironment around the microbial community, thereby increasing the reaction rate.

[0015] The variable-speed upflow system can adjust the hydraulic conditions of the microenvironment of the suspended sludge layer, improve the mass transfer efficiency between microorganisms and pollutants, accelerate the reaction rate, and increase the removal rate of pollutants. The short-term high-velocity pulse environment pushes some light sludge to the upper packing layer. The attached sludge in the packing layer captures this part of the sludge through adsorption and flocculation effect, forming the renewal of the bacterial community in the upper biological community. At the same time, the high-concentration sludge layer with attached fixed objects avoids the phenomenon of sludge floating.

[0016] Compared to conventional hydrolysis acidification reactors, this reactor is more resistant to shock loads and operates more flexibly, showing significant advantages. The independent secondary circulation allows for equipment maintenance and debugging without affecting the normal water intake process, facilitating actual operation.

[0017] Based on the above technical solution, the present invention can be further improved as follows.

[0018] Furthermore, a water intake system is installed within the suspended layer. The inlet of the circulating treatment pump is connected to the outlet of the water intake system, and the outlet of the circulating treatment pump is connected to the inlet of the pulse water distributor via an inlet pipe. An inlet electric valve is installed on the inlet pipe, and the circulating treatment pump and the inlet electric valve are electrically connected to the automatic control system.

[0019] The further beneficial effects mentioned above are: the operating parameters of the circulating treatment pump can be adjusted by the automatic control system to adjust the pulse period and achieve variable speed water distribution.

[0020] Furthermore, online monitoring instruments are installed within the suspension layer, and these instruments are electrically connected to the automatic control system.

[0021] Based on the above, the further beneficial effects are as follows: the online monitoring instrument can monitor the sewage data in the suspended layer in real time and feed the monitored data back to the automatic control system. The automatic control system can automatically control the circulation treatment pump according to the feedback data of the online monitoring instrument and the corresponding setting parameters, and adjust the flow rate of the circulation treatment pump in a timely manner to achieve precise control of the reaction intensity and stabilize the effluent quality. The online monitoring instrument can also monitor the sludge concentration in the reaction system, that is, accurately monitor the operation stage of the reaction system.

[0022] Furthermore, a sludge discharge system is installed within the sludge layer. The outlet of the sludge discharge system is connected to the inlet of a sludge pump located outside the main hydrolysis acidification reactor. The sludge pump is electrically connected to the automatic control system.

[0023] Based on the above, the following further beneficial effects are achieved: During the sludge pump start-up phase, the remaining sludge in the sludge layer can be discharged from the reaction system via the sludge discharge system and the sludge pump. Since the sludge concentration in the reaction system can also be monitored through online monitoring instruments, the sludge pump can be started in time when the sludge concentration is too high, so as to discharge the sludge from the reaction system and ensure the stable operation of the system.

[0024] Furthermore, the online monitoring instrument is located in the central region within the suspension layer.

[0025] Furthermore, a packing flushing system is installed above the packing layer inside the hydrolysis acidification main reactor. The outlet of the circulation treatment pump is connected to the inlet of the packing flushing system via a flushing pipe. An electric flushing valve is installed on the flushing pipe and is electrically connected to the automatic control system.

[0026] Based on the above, the following further beneficial effects are achieved: when the sludge concentration in the packing material is too high and there is a risk of sludge floating, the automatic control system controls the flushing electric valve to open, and the sewage drawn from the suspended layer by the circulating treatment pump can be diverted into the flushing pipe and then into the packing flushing system, ultimately realizing the flushing of the packing layer. This timely flushing ensures the treatment effect of the reactor and allows the packing layer to be flushed without affecting the normal water intake process of the pulse water distributor. The pulse water distributor water intake and the packing layer flushing use the same circulating treatment pump, saving the need for a dedicated flushing pump, reducing the number of equipment configurations and energy consumption, and preventing external water from entering the reaction system.

[0027] Furthermore, the pulse water distributor is fixed to the outside of the top of the hydrolysis acidification main reactor.

[0028] Furthermore, an outlet system is installed within the clear water layer, and the main hydrolysis acidification reactor is equipped with an outlet connected to the outlet of the outlet system.

[0029] Based on the above, the further beneficial effects are as follows: the incoming water passes through the water distribution layer, sludge layer, suspended layer, packing layer and clear water layer from bottom to top, and finally enters the effluent system, and then leaves the hydrolysis acidification main reactor through the outlet.

[0030] Furthermore, the main hydrolysis acidification reactor has a rectangular or cylindrical tower structure.

[0031] Furthermore, the effective height of the hydrolysis acidification main reactor is 4m to 6m. Attached Figure Description

[0032] Figure 1 This is a structural diagram of the variable speed upflow hydrolysis acidification reactor of this utility model;

[0033] Figure 2 This is an assembly drawing of the co-current water distribution pipe, the vertical pipe, and the pulse water distributor in this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Hydrolysis acidification main reactor; 110. Water distribution layer; 120. Sludge layer; 130. Suspended layer; 140. Packing layer; 150. Clear water layer; 160. Inlet; 170. Outlet; 2. Circulation treatment pump; 3. Vertical pipe; 4. Same-path water distribution pipe; 5. Pulse water distributor; 6. Online monitoring instrument; 7. Automatic control system; 8. Packing flushing system; 9. Flushing pipe; 10. Flushing electric valve; 11. Inlet pipe; 12. Inlet electric valve; 13. Sludge discharge system; 14. Sludge pump; 15. Effluent system; 16. Water intake system. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0037] Example 1

[0038] like Figure 1 , Figure 2 As shown, a variable-speed upflow hydrolysis acidification reactor includes: a hydrolysis acidification main reactor 1 and a circulating treatment pump 2. The hydrolysis acidification main reactor 1 is divided into a water distribution layer 110, a sludge layer 120, a suspended layer 130, a packing layer 140 and a clear water layer 150 from bottom to top. The packing layer 140 is filled with packing material by default. A vertical pipe 3 is arranged in the hydrolysis acidification main reactor 1. The lower end of the vertical pipe 3 extends into the water distribution layer 110. A parallel water distribution pipe 4 is arranged in the water distribution layer 110. The lower end of the vertical pipe 3 is connected to the inlet of the parallel water distribution pipe 4 in the water distribution layer 110, and the upper end of the vertical pipe 3 is connected to the outlet of the pulse water distributor 5. The hydrolysis acidification main reactor 1 is provided with an inlet 160 connected to the vertical pipe 3. The circulating treatment pump 2 is used to draw sewage from the suspended layer 130 and send it into the pulse water distributor 5.

[0039] During operation, upstream water first enters the vertical pipe 3 through the inlet 160, then enters the same-path water distribution pipe 4 through the vertical pipe 3, and finally is distributed into the water distribution layer 110 through the same-path water distribution pipe 4, thus achieving the first water distribution. At the same time, the circulating treatment pump 2 can send the sewage in the suspended layer 130 into the pulse water distributor 5. After the pulse water distributor 5 completes a single pulse, the sewage enters the same-path water distribution pipe 4 through the vertical pipe 3, and then is distributed into the water distribution layer 110 again through the same-path water distribution pipe 4, thus achieving the second water distribution.

[0040] The second water distribution adopts circulating water distribution, and the first and second water distributions both use the same parallel water distribution pipe 4 for uniform water distribution, increasing the uniformity of water distribution and making the wastewater concentration in the core reaction zone of the reaction system uniform or uniformly mixed, thus strengthening the reaction process within the reaction system. By adjusting the operating parameters of the circulating treatment pump 2, the pulse period can be adjusted to achieve variable speed water distribution, and the water distribution system can achieve self-cleaning through periodic short-term high flow rate conditions, reducing pipe blockage.

[0041] The upward flow velocity in the hydrolysis acidification main reactor 1 can achieve a periodic change of "low flow velocity - high flow velocity - low flow velocity - high flow velocity". By using the reaction system with periodic changes in high and low flow velocities, characteristic strains of sludge and microbial communities are screened, that is, microbial communities with specific degradation performance are screened, and the required characteristic microbial communities are transformed into the dominant microbial communities in the system, that is, a dominant living environment for the target microbial communities is formed. The reaction is accelerated by intermittently destroying the microenvironment around the microbial community, thereby increasing the reaction rate.

[0042] The variable-speed upflow system can adjust the hydraulic conditions of the microenvironment of the suspended sludge layer, improve the mass transfer efficiency between microorganisms and pollutants, accelerate the reaction rate, and increase the removal rate of pollutants. The short-term high-velocity pulse environment pushes some light sludge to the upper packing layer 140. The attached sludge in the packing layer 140 captures this part of the sludge through adsorption and clumping effect, forming the renewal of the bacterial community in the upper biological community. At the same time, the high-concentration sludge layer with attached fixed objects avoids the phenomenon of sludge floating.

[0043] Compared to conventional hydrolysis acidification reactors, this reactor is more resistant to shock loads and operates more flexibly, showing significant advantages. The independent secondary circulation allows for equipment maintenance and debugging without affecting the normal water intake process, facilitating actual operation.

[0044] Example 2

[0045] like Figure 1 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0046] A water intake system 16 is installed within the suspended layer 130. The inlet of the circulating treatment pump 2 is connected to the outlet of the water intake system 16. The outlet of the circulating treatment pump 2 is connected to the inlet of the pulse water distributor 5 via the inlet pipe 11. An inlet electric valve 12 is installed on the inlet pipe 11. The circulating treatment pump 2 is electrically connected to the automatic control system 7. The inlet electric valve 12 is also electrically connected to the automatic control system 7. The automatic control system 7 can control the opening and closing of the inlet electric valve 12. The operating parameters of the circulating treatment pump 2 can be adjusted through the automatic control system 7 to adjust the pulse cycle and achieve variable speed water distribution.

[0047] Example 3

[0048] like Figure 1 As shown, this embodiment is a further improvement on embodiment 2, as detailed below:

[0049] An online monitoring instrument 6 is installed inside the suspended layer 130. The online monitoring instrument 6 is electrically connected to the automatic control system 7. The online monitoring instrument 6 can monitor the sewage data in the suspended layer 130 in real time and feed the monitored data back to the automatic control system 7. The automatic control system 7 can automatically control the circulating treatment pump 2 according to the feedback data of the online monitoring instrument 6 and the corresponding setting parameters, and adjust the flow rate of the circulating treatment pump 2 in a timely manner to achieve precise control of the reaction intensity and stabilize the effluent quality. The online monitoring instrument 6 can also monitor the sludge concentration in the reaction system, that is, accurately monitor the operation stage of the reaction system.

[0050] Example 4

[0051] like Figure 1 As shown, this embodiment is a further improvement on embodiment 3, as detailed below:

[0052] A sludge discharge system 13 is installed within the sludge layer 120. The outlet of the sludge discharge system 13 is connected to the inlet of a sludge pump 14 located outside the hydrolysis acidification main reactor 1. The sludge pump 14 is electrically connected to the automatic control system 7. During the start-up phase of the sludge pump 14, the remaining sludge in the sludge layer 120 can be discharged from the reaction system via the sludge discharge system 13 and the sludge pump 14. Since the sludge concentration in the reaction system can also be monitored by the online monitoring instrument 6, the sludge pump 14 can be turned on in time when the sludge concentration is too high, so as to discharge the sludge from the reaction system and ensure the stable operation of the system.

[0053] In this embodiment, the online monitoring instrument 6 is preferably located in the central region of the suspension layer 130.

[0054] Example 5

[0055] like Figure 1 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0056] A packing flushing system 8 is installed above the packing layer 140 in the hydrolysis acidification main reactor 1. The outlet of the circulating treatment pump 2 is connected to the inlet of the packing flushing system 8 via a flushing pipe 9. A flushing electric valve 10 is installed on the flushing pipe 9 and is electrically connected to the automatic control system 7. When the sludge concentration in the packing is too high and there is a risk of sludge floating, the automatic control system 7 controls the flushing electric valve 10 to open. The wastewater drawn from the suspended layer 130 by the circulating treatment pump 2 can be diverted into the flushing pipe 9 and then into the packing flushing system 8, ultimately realizing the flushing of the packing layer 140. This timely flushing ensures the treatment effect of the reactor and allows the packing layer 140 to be flushed without affecting the normal water intake process of the pulse water distributor 5. The same circulating treatment pump 2 is used for the water intake of the pulse water distributor 5 and the flushing of the packing layer 140, saving the need for a dedicated flushing pump, reducing the number of equipment and energy consumption, and preventing external water from entering the reaction system.

[0057] Example 6

[0058] like Figure 1 As shown, this embodiment is a further improvement on any one of embodiments 1 to 5, as detailed below:

[0059] The pulse water distributor 5 is preferably fixed on the top of the hydrolysis acidification main reactor 1. Then the upper end of the vertical pipe 3 passes through the sludge layer 120, the suspended layer 130, the packing layer 140 and the clear water layer 150 in sequence, and then passes through the top of the hydrolysis acidification main reactor 1 and connects with the outlet of the pulse water distributor 5.

[0060] Example 7

[0061] like Figure 1 As shown, this embodiment is a further improvement on any one of embodiments 1 to 6, as detailed below:

[0062] An effluent system 15 is installed within the clear water layer 150. The hydrolysis acidification main reactor 1 is equipped with an effluent outlet 170 connected to the outlet of the effluent system 15. The incoming water passes through the water distribution layer 110, sludge layer 120, suspended layer 130, packing layer 140 and clear water layer 150 from bottom to top, and finally enters the effluent system 15, and then leaves the hydrolysis acidification main reactor 1 through the effluent outlet 170.

[0063] Example 8

[0064] like Figure 1 As shown, this embodiment is a further improvement on any one of embodiments 1 to 7, as detailed below:

[0065] The hydrolysis acidification main reactor 1 is preferably a rectangular or cylindrical tower structure. Of course, other structures are not excluded. Here, we only give two common structures as examples, with an effective height of 4m to 6m.

[0066] It is understood that the embodiments of this utility model are exemplary and should not be construed as limiting the utility model. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this utility model.

Claims

1. A variable-speed upflow hydrolysis acidification reactor, characterized in that, include: The main reactor (1) for hydrolysis acidification and a circulating treatment pump (2) are arranged in the following order from bottom to top: water distribution layer (110), sludge layer (120), suspended layer (130), packing layer (140) and clear water layer (150). A vertical pipe (3) is arranged in the main reactor (1). The lower end of the vertical pipe (3) extends into the water distribution layer (110) and is connected to the inlet of the same-path water distribution pipe (4) in the water distribution layer (110). The upper end of the vertical pipe (3) is connected to the outlet of the pulse water distributor (5). The main reactor (1) for hydrolysis acidification is provided with an inlet (160) connected to the vertical pipe (3). The circulating treatment pump (2) is used to draw sewage from the suspended layer (130) and send it into the pulse water distributor (5).

2. The variable-speed upflow hydrolysis acidification reactor according to claim 1, characterized in that, A water intake system (16) is installed in the suspended layer (130). The inlet of the circulating treatment pump (2) is connected to the outlet of the water intake system (16). The outlet of the circulating treatment pump (2) is connected to the inlet of the pulse water distributor (5) via the inlet pipe (11). An electric inlet valve (12) is provided on the inlet pipe (11). The circulating treatment pump (2) and the electric inlet valve (12) are electrically connected to the automatic control system (7).

3. The variable-speed upflow hydrolysis acidification reactor according to claim 2, characterized in that, An online monitoring instrument (6) is arranged inside the suspension layer (130), and the online monitoring instrument (6) is electrically connected to the automatic control system (7).

4. A variable-speed upflow hydrolysis acidification reactor according to claim 3, characterized in that, A sludge discharge system (13) is installed in the sludge layer (120). The outlet of the sludge discharge system (13) is connected to the inlet of a sludge pump (14) located outside the hydrolysis acidification main reactor (1). The sludge pump (14) is electrically connected to an automatic control system (7).

5. A variable-speed upflow hydrolysis acidification reactor according to claim 3 or 4, characterized in that, The online monitoring instrument (6) is located in the central region of the suspension layer (130).

6. A variable-speed upflow hydrolysis acidification reactor according to claim 1 or 2, characterized in that, The hydrolysis acidification main reactor (1) is equipped with a packing flushing system (8) above the packing layer (140). The outlet of the circulating treatment pump (2) is connected to the inlet of the packing flushing system (8) via a flushing pipe (9). The flushing pipe (9) is equipped with a flushing electric valve (10), which is electrically connected to the automatic control system (7).

7. A variable-speed upflow hydrolysis acidification reactor according to claim 1, characterized in that, The pulse water distributor (5) is fixed on the outside of the top of the hydrolysis acidification main reactor (1).

8. A variable-speed upflow hydrolysis acidification reactor according to claim 1, characterized in that, The clear water layer (150) is equipped with an outlet system (15), and the hydrolysis acidification main reactor (1) is provided with an outlet (170) connected to the outlet of the outlet system (15).

9. A variable-speed upflow hydrolysis acidification reactor according to claim 1, characterized in that, The hydrolysis acidification main reactor (1) has a rectangular or cylindrical tower structure.

10. A variable-speed upflow hydrolysis acidification reactor according to claim 9, characterized in that, The effective height of the hydrolysis acidification main reactor (1) is 4m to 6m.

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