Gas mixed IC anaerobic reactor

Abstract

The application discloses a gas-mixed IC anaerobic reactor, which comprises a first reaction chamber located at a lower part and a second reaction chamber located at an upper part, the upper part of the first reaction chamber is a first inverted V-shaped gas collecting hood, the top of the second reaction chamber is a liquid surface, a plurality of separate sludge-water separation devices are arranged below the liquid surface, an outer part of the sludge-water separation devices is provided with only one layer of second inverted V-shaped gas collecting hoods which have the same function as the first inverted V-shaped gas collecting hood, a separated gas pocket is arranged at a preset distance above the liquid surface, the separated gas pocket is connected to a cyclone water distributor at the bottom of the first reaction chamber through a central reflux pipe arranged at a lower part of the separated gas pocket, the lateral surface of the separated gas pocket is connected to the first inverted V-shaped gas collecting hood through a first riser pipe and connected to the second inverted V-shaped gas collecting hood through a second riser pipe, and a biogas discharge pipe is arranged at the top of the separated gas pocket. The gas-mixed IC anaerobic reactor can improve the sludge-water mixing mass transfer effect of the second reaction chamber, and improve the treatment capacity and treatment efficiency of the whole reactor.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wastewater treatment equipment, and particularly relates to a gas-mixed IC anaerobic reactor. BACKGROUND

[0002] The existing IC anaerobic reactor is shown in FIG. 1, which is a sectional view of the existing IC anaerobic reactor. From bottom to top, it includes a sludge discharge pipe 101, a water inlet pipe 102, a rotational flow water distributor 103, a first reaction chamber 104 (the area between the lowermost arrows), a central reflux pipe 105 (two are shown in the figure), a total water outlet pipe 106, a three-phase separator 107 of the first reaction chamber, a second reaction chamber 108 (the area between the middle arrows), a three-phase separator 109 of the second reaction chamber, a sludge-water separation zone 110 (the area between the uppermost arrows), a biogas pipe 111, a separation gas pocket 112, a lower lifting pipe 113, and a water seal 114. Figure 1 Figure 1 The existing IC anaerobic reactor has a load much higher than that of a UASB reactor. The reason is that it has one more first reaction chamber 104 with a large proportion of internal reflux of gas stripping than the UASB, which has a higher upward flow rate, promotes the first reaction chamber 104 to be in a substantially mixed state, and thus the first reaction chamber 104 of the existing IC anaerobic reactor can complete at least 80% of the treatment capacity and treatment efficiency, and the first reaction chamber 104 can produce more than 80% of the biogas amount, forming a very high gas-liquid upward flow rate, so that the sludge bed in the first reaction chamber 104 fills the entire reaction chamber. Since the biogas produced by the first reaction chamber 104 and the sludge-water mixture with a large proportion of reflux of the first reaction chamber gas are basically collected by the gas collecting hood of the first reaction chamber, only a small amount of biogas and water can enter the subsequent second reaction chamber 108, resulting in a forced substantial reduction in the gas-liquid upward flow rate of the second reaction chamber 108, and the second reaction chamber 108 does not have its own large proportion of internal reflux facilities for gas stripping. Therefore, the second reaction chamber 108 of the existing IC anaerobic reactor has a low upward flow rate similar to that of the UASB, and the sludge bed of the first reaction chamber 104 expanded into the second reaction chamber 108 cannot fill the entire reaction chamber like the first reaction chamber 104, so that its treatment capacity and treatment efficiency are as low as the UASB due to the insufficient number of microorganisms, which is a waste of space. Therefore, how to make both reaction chambers of the IC anaerobic reactor have a high upward flow rate to achieve complete mixing is a key factor to improve the treatment capacity and treatment efficiency of the IC anaerobic reactor, but there is no corresponding solution in the prior art. SUMMARY

[0003] ​To solve the above problems, the application provides a gas mixing type IC anaerobic reactor, which can improve the sludge-water mixing mass transfer effect of a second reaction chamber, improve the treatment capacity and efficiency of the whole reactor, and expand the application range to the field of high-concentration organic wastewater treatment.

[0004] The gas mixing type IC anaerobic reactor provided by the application comprises a first reaction chamber located at the lower part and a second reaction chamber located at the upper part, the upper part of the first reaction chamber is a first inverted V-shaped gas collecting hood, the top of the second reaction chamber is a liquid surface, a plurality of separate sludge-water separation devices are arranged below the liquid surface, a second inverted V-shaped gas collecting hood with the same function as the first inverted V-shaped gas collecting hood is arranged outside the sludge-water separation devices, a separation gas pocket is arranged at a preset distance above the liquid surface, the separation gas pocket is connected to a cyclone water distributor at the bottom of the first reaction chamber through a central reflux pipe arranged at the lower part of the separation gas pocket, the side of the separation gas pocket is connected to the first inverted V-shaped gas collecting hood through a first riser pipe and connected to the second inverted V-shaped gas collecting hood through a second riser pipe, and a biogas discharge pipe is arranged at the top of the separation gas pocket.

[0005] Preferably, in the above gas mixing type IC anaerobic reactor, a water outlet pipe is arranged at a position below the liquid surface in each sludge-water separation device, for guiding the separated clean water out of the reactor.

[0006] Preferably, in the above gas mixing type IC anaerobic reactor, the first inverted V-shaped gas collecting hood has no less than two layers, and each layer of the first inverted V-shaped gas collecting hood is connected to the first riser pipe.

[0007] Preferably, in the above gas mixing type IC anaerobic reactor, a water inlet pipe is arranged at the bottom of the first reaction chamber, and the water inlet pipe is used to guide sewage into the cyclone water distributor.

[0008] Preferably, in the above gas mixing type IC anaerobic reactor, a sludge discharge pipe is further arranged at the bottom of the first reaction chamber, for discharging excess sludge out of the reactor.

[0009] Preferably, in the above gas mixing type IC anaerobic reactor, the water outlet pipes are connected to a total water outlet pipe, and the total water outlet pipe is used to guide the clean water separated by each water outlet pipe out of the reactor.

[0010] As can be known from the above description, the gas-mixing IC anaerobic reactor provided by the application has the first reaction chamber located at the lower part and the second reaction chamber located at the upper part, the upper part of the first reaction chamber is a first inverted V-shaped gas collecting hood, the top of the second reaction chamber is a liquid surface, a plurality of separate sludge-water separation devices are arranged below the liquid surface, an outer part of the sludge-water separation devices is provided with only one layer of second inverted V-shaped gas collecting hood which has the same function as the first inverted V-shaped gas collecting hood, a separation gas pocket is arranged at a preset distance above the liquid surface, the separation gas pocket is connected to a cyclone water distributor at the bottom of the first reaction chamber through a central reflux pipe arranged at the lower part of the separation gas pocket, the separation gas pocket is connected to the first inverted V-shaped gas collecting hood through a first riser pipe and connected to the second inverted V-shaped gas collecting hood through a second riser pipe, and a biogas discharge pipe is arranged at the top of the separation gas pocket, so that the sludge-water mixing mass transfer effect of the second reaction chamber can be improved, the treatment capacity and treatment efficiency of the whole reactor can be improved, and the application range is extended to the field of high-concentration organic wastewater treatment. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only constitute a part of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0012] Figure 1 It is a sectional view of the existing IC anaerobic reactor;

[0013] Figure 2 It is a schematic view of an embodiment of the gas-mixing IC anaerobic reactor provided by the present application. DETAILED DESCRIPTION

[0014] The core of the present application is to provide a gas-mixing IC anaerobic reactor, which can improve the sludge-water mixing mass transfer effect of the second reaction chamber, improve the treatment capacity and treatment efficiency of the whole reactor, and extend the application range to the field of high-concentration organic wastewater treatment.

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments only constitute a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0016] An embodiment of the gas-mixing IC anaerobic reactor provided by the present application is shown in Figure 2 , Figure 2A schematic diagram of an embodiment of a gas mixed IC anaerobic reactor provided by the present application, which can include a first reaction chamber 201 located in the lower part and a second reaction chamber 202 located in the upper part, the upper part of the first reaction chamber 201 is a first inverted V-shaped gas collection hood 203, the top of the second reaction chamber 202 is a liquid surface, a plurality of separate sludge-water separation devices 204 are arranged below the liquid surface, and a second inverted V-shaped gas collection hood 205 identical in function to the first inverted V-shaped gas collection hood 203 is arranged outside the sludge-water separation devices 204, which can provide a power source for the gas lift internal reflux of the sludge-water mixture in the second reaction chamber, so that the second reaction chamber can have its own gas lift internal reflux with a large proportion, and can have a high upward flow rate, so that both reaction chambers can be in a fully mixed state, and the separate sludge-water separation devices used can be free from the limitations of the narrow gap flow rate of the second reaction chamber three-phase separator not being easy to be too high and being prone to cause sludge running, the upward flow rate of the second reaction chamber is no longer limited, which is beneficial to the second reaction chamber to withstand a higher upward flow rate, and the sludge-water separation devices can use commonly used devices in the field, which can replace the function of the three-phase separation zone of the second reaction chamber to achieve sludge-water separation, a separation gas pocket 206 is arranged at a predetermined distance above the liquid surface, the separation gas pocket 206 is connected to a cyclone water distributor 208 at the bottom of the first reaction chamber 201 through a central reflux pipe 207 arranged at the lower part thereof, the side of the separation gas pocket 206 is connected to the first inverted V-shaped gas collection hood 203 through a first riser 209, and is connected to the second inverted V-shaped gas collection hood 205 through a second riser 210, and a biogas discharge pipe 211 is arranged at the top of the separation gas pocket 206.

[0017] It can be seen that in this embodiment, the sludge-water separation form of the IC anaerobic reactor is improved, the gas stripping internal reflux mechanism of the second reaction chamber is added, the flow state of the second reaction chamber of the IC anaerobic reactor in the prior art is changed from the upflow of the UASB to the complete mixing type, and the sludge-water separation function of the three-phase separator of the second reaction chamber of the traditional IC anaerobic reactor is replaced by the independent sludge-water separation device, so that the three-phase separator of the second reaction chamber can only function as the gas hood of the first reaction chamber. By losing the sludge-water separation function of the three-phase separator of the second reaction chamber of the traditional IC reactor, the original biogas pipe connected with the second inverted V-shaped gas hood of the second reaction chamber is changed to function as the riser connected with the gas hood of the first reaction chamber, and therefore the outlet of the biogas pipe connected with the three-phase separator of the original second reaction chamber is changed to the separation gas bag, and is connected and communicated with the separation gas bag and is cut off from the original biogas main pipe. Through the above changes, the water seal for forming the gas chamber is no longer used, the independent sludge-water separation device is arranged for the second reaction chamber in the scheme, and the independent sludge-water separation zone is arranged. The second reaction chamber in the scheme only needs to retain the uppermost layer of the inverted V-shaped gas hood outside the sludge-water separation device of the original IC reactor, and can realize the gas stripping lifting of the second reaction chamber, and the rest of the multiple layers of the three-phase separator can be completely cancelled.

[0018] Moreover, the internal reflux of the second reaction chamber is preferentially selected to flow back to the first reaction chamber, so that compared with the traditional IC anaerobic reactor, the first reaction chamber has an additional amount of internal reflux of the second reaction chamber, the first reaction chamber of the gas mixing type IC anaerobic reactor provided in the embodiment has a higher upflow velocity, the requirement for the water distribution effect of the water distributor can be reduced, the sludge-water mixing mass transfer effect of the first reaction chamber is further improved, the second reaction chamber can also have its own gas stripping internal reflux in a large proportion, and therefore a higher upflow velocity similar to that of the first reaction chamber is achieved, and the complete mixing state is achieved.

[0019] From the above description, it can be known that, in the embodiment of the gas mixing type IC anaerobic reactor provided by the application, the first reaction chamber is located at the lower part and the second reaction chamber is located at the upper part, the upper part of the first reaction chamber is a first inverted V-shaped gas collecting hood, the top of the second reaction chamber is a liquid surface, a plurality of separate sludge-water separation devices are arranged below the liquid surface, an only one layer of second inverted V-shaped gas collecting hood which has the same function as the first inverted V-shaped gas collecting hood is arranged outside the sludge-water separation devices, a separation gas pocket is arranged at a preset distance above the liquid surface, the separation gas pocket is connected to the cyclone water distributor at the bottom of the first reaction chamber through a central reflux pipe arranged at the lower part of the separation gas pocket, the side of the separation gas pocket is connected to the first inverted V-shaped gas collecting hood through a first riser pipe and is connected to the second inverted V-shaped gas collecting hood through a second riser pipe, and a biogas discharge pipe is arranged at the top of the separation gas pocket, so that the sludge-water mixing mass transfer effect of the second reaction chamber can be improved, the treatment capacity and the treatment efficiency of the whole reactor can be improved, and the application range is extended to the field of high-concentration organic wastewater treatment.

[0020] In one specific embodiment of the above-mentioned gas mixing type IC anaerobic reactor, further referring to Figure 2 The position below the liquid surface in each sludge-water separation device 204 is provided with a water outlet pipe 212 for guiding the separated clean water out of the reactor.

[0021] In another specific embodiment of the above-mentioned gas mixing type IC anaerobic reactor, the first inverted V-shaped gas collecting hood 203 is not less than two layers, and each layer of the first inverted V-shaped gas collecting hood 203 is connected to the first riser pipe 209.

[0022] In the above-mentioned gas mixing type IC anaerobic reactor, the bottom of the first reaction chamber 201 is provided with a water inlet pipe 213, and the water inlet pipe 213 is used to guide the sewage into the cyclone water distributor 208, which is more difficult to be blocked, and of course other types of water distributors can also be selected according to actual needs, which is not limited here.

[0023] Further, the bottom of the first reaction chamber can also be provided with a sludge discharge pipe 214 for discharging excess sludge out of the reactor.

[0024] On the basis of the embodiment of the above-mentioned gas mixing type IC anaerobic reactor, the water outlet pipes 212 can be connected to a total water outlet pipe 215, and the total water outlet pipe 215 is used to guide the clean water separated by each water outlet pipe 212 out of the reactor.

[0025] When the above-mentioned gas mixing type IC anaerobic reactor is operated, the following steps can be adopted:

[0026] (1) The sewage to be treated and the sludge-water mixed liquid returned by gas stripping in the first reaction chamber and the second reaction chamber are first subjected to sludge-water mixing in the first reaction chamber through the water distributor.

[0027] (2) the sludge-water mixture after mixing in the water distributor in step (1) is fully reacted in the first reaction chamber, and under the combined action of the upward flow rate of water and the biogas bubbles generated, a gas-liquid mixed upward flow rate is formed, which drives the anaerobic sludge in the first reaction chamber to flow upward. Due to the extremely high gas-liquid mixed upward flow rate in the first reaction chamber, the sludge bed in the first reaction chamber is in a fully expanded state. Compared with the first reaction chamber of the traditional IC anaerobic reactor, there is an additional upward flow rate of water brought by the large proportion of internal reflux of the gas stripping from the second reaction chamber. Therefore, the sludge bed in the first reaction chamber of the IC reactor after the innovation can be fully expanded to the second reaction chamber through the inverted V-shaped gas collection hood of the first reaction chamber, so that the sludge concentration in the second reaction chamber is much higher than that in the second reaction chamber of the traditional IC reactor. This inevitably leads to a substantial increase in the microbial removal capacity and removal efficiency of the second reaction chamber, so the biogas production will increase substantially. At the same time, under the synergistic action of the large proportion of internal reflux of the gas stripping in the second reaction chamber itself, the gas-liquid mixed upward flow rate in the second reaction chamber will be substantially higher than that in the second reaction chamber of the traditional IC. Therefore, the second reaction chamber of the IC anaerobic reactor provided in the embodiment can have a higher gas-liquid mixed upward flow rate than the first reaction chamber of the traditional IC anaerobic reactor, thereby having the gas-liquid mixed upward flow rate possessed by the complete mixing flow state.

[0028] (3) the sludge-water mixture after fully reacting in the first reaction chamber in step (2) can directly rise to the second reaction chamber through the first inverted V-shaped gas collection hood of the first reaction chamber under the action of the extremely high gas-liquid mixed upward flow rate in the first reaction chamber, and biological metabolic reactions continue to occur therein, thereby generating a large amount of biogas. Due to the generation of a large amount of biogas, the second reaction chamber has an extremely high upward flow rate of gas bubbles. In addition, the second reaction chamber has a large proportion of internal reflux system for gas stripping, so that the second reaction chamber can have an extremely high gas-liquid mixed upward flow rate that the first reaction chamber of the traditional IC reactor cannot have. This ensures that the second reaction chamber can achieve good mass transfer of sludge and water in a complete mixing state. Compared with the second reaction chamber of the traditional IC, the treatment capacity and treatment efficiency of the second reaction chamber are substantially improved due to the large amount of anaerobic sludge from the first reaction chamber flowing into the second reaction chamber.

[0029] (4) The sludge-water mixture obtained after sufficient reaction in the second reaction chamber in step (3) is lifted to the area where the second inverted V-shaped gas collection hood is located in the second reaction chamber under the action of the gas-liquid mixed upflow, and then is selected to enter the sludge-water separation device with an independent sludge-water separation zone. In this area, sludge, water and biogas are separated into three phases, i.e. part of the sludge directly slides into the second reaction chamber under the action of gravity, and the other part of the sludge is mixed with water and biogas and is lifted to the top of the separation gas pocket by the gas-lifting riser of the second reaction chamber. After the action of the separation gas pocket, the biogas is discharged to the user, and the sludge-water mixture falls back to the first reaction chamber through the central return pipe to continue the cycle. The clean water separated from the three phases is collected by the water outlet collection system at the top of the IC anaerobic reactor and is discharged from the IC anaerobic reactor.

[0030] In summary, the above-mentioned gas-mixed IC anaerobic reactor provided by the embodiments of the present application can realize all the functions of the traditional IC anaerobic reactor after the above-mentioned steps, but the processing capacity and processing efficiency of the gas-mixed IC anaerobic reactor are incomparable to those of the traditional IC anaerobic reactor.

[0031] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gas-mixed IC anaerobic reactor, characterized in that, The device includes a first reaction chamber located at the bottom and a second reaction chamber located at the top. The upper part of the first reaction chamber is a first inverted V-shaped gas collection hood, and the top of the second reaction chamber is a liquid surface. Multiple separate mud-water separation devices are arranged below the liquid surface. A second inverted V-shaped gas collection hood with the same function as the first inverted V-shaped gas collection hood is arranged outside the mud-water separation devices. A separation gas bag is arranged at a predetermined distance above the liquid surface. The separation gas bag is connected to a vortex water distributor at the bottom of the first reaction chamber through a central return pipe arranged at its lower part. The side of the separation gas bag is connected to the first inverted V-shaped gas collection hood through a first lift pipe and to the second inverted V-shaped gas collection hood through a second lift pipe. A biogas discharge pipe is provided at the top of the separation gas bag. After being fully reacted in the second reaction chamber, the mud-water mixture rises to the area of ​​the second inverted V-shaped gas collection hood in the second reaction chamber under the action of the gas-liquid mixing upward flow velocity. Then, it enters the mud-water separation equipment with an independent mud-water separation zone. In this zone, mud, water, and biogas achieve the final three-phase separation. Under the action of gravity, part of the sludge slides directly into the second reaction chamber, while the other part, as a mud-water-gas mixture, is lifted by the second riser pipe of the second reaction chamber to the separation gas bag at the top. After being processed by the separation gas bag, the biogas is discharged to the user, and the mud-water mixture falls back into the first reaction chamber through the central return pipe to continue participating in the cyclic process. The clear water separated by the three phases is collected by the top effluent collection system and discharged from the IC anaerobic reactor.

2. The gas-mixed IC anaerobic reactor according to claim 1, characterized in that, Each of the mud-water separation devices is equipped with a water outlet pipe located below the liquid level to guide the separated clean water outside the reactor.

3. The gas-mixed IC anaerobic reactor according to claim 1, characterized in that, The first inverted V-shaped gas collection hood has at least two layers, and each layer of the first inverted V-shaped gas collection hood is connected to the first lifting pipe.

4. The gas-mixed IC anaerobic reactor according to claim 1, characterized in that, The bottom of the first reaction chamber is provided with a water inlet pipe, which is used to introduce sewage into the vortex water distributor.

5. The gas-mixed IC anaerobic reactor according to claim 1, characterized in that, The bottom of the first reaction chamber is also equipped with a sludge discharge pipe for discharging excess sludge outside the reactor.

6. The gas-mixed IC anaerobic reactor according to claim 2, characterized in that, All the outlet pipes are connected to a main outlet pipe, which is used to uniformly lead the clean water separated from each outlet pipe to outside the reactor.

Images