Continuous reaction system

Abstract

The utility model discloses a continuous reaction system and belongs to the technical field of sewage treatment. The continuous reaction system comprises a tank body, a replacement opening is formed in the upper portion of the tank body, a gas stirring device is arranged in the tank body and can be taken out from the replacement opening, the tank body is connected with a gas inlet pipe, the gas inlet pipe is detachably communicated with the gas stirring device, and the gas stirring device can be taken out from the replacement opening. And the connecting point of the gas inlet pipe and the gas stirring device is positioned above a preset liquid level in the tank body. According to the continuous reaction system, when the gas stirring device needs to be replaced, the replacement opening, corresponding to the gas stirring device, in the top of the tank top is opened, the gas stirring device to be replaced is disconnected from the gas inlet pipe, a new gas stirring device is detachably communicated with the gas inlet pipe, and the gas stirring device to be replaced is pulled out to complete replacement. According to the scheme, the gas stirring equipment in the tank can be replaced without cleaning the tank, and the maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sewage treatment technical field, especially relate to a continuous reaction system. BACKGROUND

[0002] High organic pollution wastewater is usually treated by anaerobic biological technology, and currently commonly used anaerobic reactors such as UASB (upflow anaerobic sludge bed), EGSB (expanded granular sludge bed) and IC (internal circulation anaerobic reactor) are all integrated upflow reactors, and a typical anaerobic reactor comprises a water inlet and distribution system, a reaction zone, a three-phase separator and a water outlet system. Wastewater enters the reactor from the water inlet and distribution system and flows from bottom to top, fully contacts with anaerobic sludge in the reaction zone, and anaerobic microorganisms complete degradation of organic pollutants and produce biogas, and the mixed liquid of sludge, water and gas continues to move upward, and the three-phase separator completes separation of sludge, water and gas, sludge precipitates and falls back to the reaction zone, gas is collected upward to a gas collection chamber, and wastewater is discharged from the reactor through the water outlet system.

[0003] The above-mentioned traditional anaerobic reactor is basically an integrated reactor, and the reaction zone and the three-phase separator are in the same space and have an up-down relationship, the three-phase separator has great limitations due to narrow flow velocity, and as the water inlet load increases and the gas production load rate increases, the upward flow velocity of gas and liquid inevitably increases, so sludge loss is easily caused, and therefore the design of the current upflow anaerobic reactor is restricted to a certain extent, and the further improvement of the load of the anaerobic reactor is restricted, that is, there is a contradiction between the improvement of the treatment load and the separation effect of sludge, water and gas.

[0004] In addition, in order to achieve good sludge and water mixing mass transfer effect, the anaerobic reactor also needs sufficient upward flow velocity, but the upward flow velocity is difficult to guarantee due to the water inlet load in different periods. Even though the EGSB reactor has a large internal reflux pump, it completely depends on the high-power sludge reflux pump to ensure that the reactor has sufficient upward flow velocity through the water distributor, and the water distribution system also has technical problems such as easy clogging, difficult maintenance and high energy consumption.

[0005] The existing gas stirring device is easily clogged after a long time of work, thereby reducing the dissolved oxygen content and biogas production rate in the anaerobic reactor, and the replacement of the gas stirring device often needs to stop the machine and clean the tank, and frequent stoppage and tank cleaning seriously reduces the sewage treatment efficiency of the anaerobic reactor. UTILITY MODEL CONTENTS

[0006] The utility model provides a continuous reaction system, which can realize replacement of the gas stirring device without cleaning the tank, reduces the maintenance cost and maintains the stability of the sewage treatment system.

[0007] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0008] The application provides a continuous reaction system, which comprises a tank body, a replacement opening is formed in the upper portion of the tank body, a gas stirring device is arranged in the tank body, the gas stirring device can be taken out from the replacement opening, an air inlet pipe is connected to the tank body, the air inlet pipe is detachably communicated with the gas stirring device, and the connection point of the air inlet pipe and the gas stirring device is located above the preset liquid level of the tank body.

[0009] Further, the gas stirring device comprises a gas stirring pipe, the gas stirring pipe is located in the tank body, the gas stirring pipe is provided with air holes, and the gas stirring pipe is detachably communicated with the air inlet pipe.

[0010] Further, the gas stirring device further comprises a gas stirring vertical pipe, the gas stirring vertical pipe extends into the bottom of the tank body, one end of the gas stirring vertical pipe located in the bottom of the tank body is detachably communicated with the gas stirring pipe, and the other end of the gas stirring vertical pipe is detachably communicated with the air inlet pipe.

[0011] Further, a plurality of gas stirring vertical pipes are arranged, a plurality of replacement openings are arranged at corresponding positions, the plurality of gas stirring vertical pipes are all detachably communicated with the air inlet pipe, and the two ends of the gas stirring pipe are both detachably communicated with the gas stirring vertical pipes.

[0012] Further, the gas stirring pipe and the gas stirring vertical pipe are both flexible pipes.

[0013] Further, the gas stirring pipe comprises an aeration flexible pipe, and the gas stirring vertical pipe comprises a modified rubber pipe.

[0014] Further, a clamp is arranged on the gas stirring vertical pipe, and the clamp is detachably communicated with the gas stirring vertical pipe and the gas stirring pipe.

[0015] Further, a ball valve and a quick connector are arranged on the air inlet pipe, the ball valve controls the on-off of the air inlet pipe, and the quick connector is detachably communicated with the air inlet pipe and the gas stirring vertical pipe.

[0016] Further, the air inlet pipe comprises an air inlet main pipe and a gas stirring branch pipe, the air inlet main pipe penetrates through the tank body, the gas stirring branch pipe is located in the tank body, the gas stirring branch pipe is communicated with the air inlet main pipe, the gas stirring branch pipe is detachably communicated with the gas stirring device, and the connection point of the gas stirring branch pipe and the gas stirring device is located in the upper portion of the tank body.

[0017] Further, the air inlet main pipe is further communicated with an air outlet pipe, the air outlet pipe extends to the top of the tank body, a valve is arranged on the portion of the air outlet pipe located at the top of the tank body.

[0018] Further, the tank body further comprises an air outlet pipe for leading out the gas generated in the tank body, and the air outlet pipe is communicated with the air inlet pipe.

[0019] The utility model discloses a continuous reaction system compared with prior art has the advantages of:

[0020] The utility model discloses a continuous reaction system when needing to replace the gas stirring device, after completing the necessary pre-operation such as closing the air inlet valve, releasing the gas in the tank, opening the replacement opening corresponding to the gas stirring device at the top of the tank, disconnecting the gas stirring device to be replaced from the air inlet pipe, detachably connecting the new gas stirring device with the air inlet pipe, and pulling out the gas stirring device to be replaced, the gas stirring equipment in the tank can be replaced without cleaning the tank, the maintenance cost is reduced, and through timely replacement of the gas stirring equipment, the gas mixing effect is improved, and the stable processing performance of the processing system is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the utility model embodiment, the following will be briefly introduced the drawings needed to be used in the embodiment description, obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0022] Figure 1 The utility model embodiment provides the side view of the continuous reaction system;

[0023] Figure 2 The utility model embodiment provides the top view of the continuous reaction system;

[0024] Figure 3 The utility model embodiment provides the side view of the continuous reaction system in another direction;

[0025] Figure 4 The utility model embodiment provides the side view of the continuous reaction system in another direction;

[0026] Figure 5 The utility model embodiment provides the top view of the continuous reaction system.

[0027] The reference signs in the drawings are as follows:

[0028] 1, tank body;11, replacement opening;

[0029] 2, air inlet pipe;21, air inlet main pipe;22, gas stirring branch pipe;23, exhaust pipe;

[0030] 3, gas stirring device;31, gas stirring pipe;32, gas stirring vertical pipe;

[0031] 41, biogas main pipe; 42, biogas branch pipe. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be apparently and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0033] As shown in the drawings, Figures 1-5 The present application provides a continuous reaction system, which comprises a tank body 1, a replacement opening 11 is formed in the upper part of the tank body 1, a gas stirring device 3 is arranged in the tank body 1, the replacement opening 11 is arranged correspondingly to the gas stirring device 3, the tank body 1 is connected with a gas inlet pipe 2, the gas inlet pipe 2 is located at least partially in the upper part of the tank body 1, the gas inlet pipe 2 located in the upper part of the tank body 1 is detachably communicated with the gas stirring device 3, and the connecting point of the gas inlet pipe 2 and the gas stirring device 3 is located above the preset liquid level in the tank body 1.

[0034] The continuous reaction system disclosed by the present application, when the gas stirring device 3 needs to be replaced, after completing the necessary pre-work such as closing the gas inlet valve and releasing the gas in the tank, the replacement opening 11 corresponding to the gas stirring device 3 at the top of the tank top is opened, the gas stirring device 3 to be replaced is disconnected from the gas inlet pipe 2, the new gas stirring device 3 is detachably communicated with the gas inlet pipe 2, and the gas stirring device 3 to be replaced is pulled out to complete the replacement.

[0035] It should be noted that the replacement opening 11 will remain in a sealed state during the reaction of the tank body 1 to provide an anaerobic reaction environment, and when replacement is needed, the replacement opening 11 can be opened to accelerate the discharge of gas in the tank and speed up the replacement of the gas stirring device 3, as shown in the drawings, Figure 5 It can be understood that in another embodiment, the replacement opening 11 can also be airtight window, through hole, etc., which is not limited here.

[0036] It should be noted that since the sludge in the tank body 1 is still in continuous reaction, the water level in the tank body 1 is in a state of change, as shown in the drawings, Figure 1 The above-mentioned preset liquid level refers to the highest liquid level that the sludge can reach in the tank body 1 under normal reaction conditions, so under normal circumstances, the connecting point is located in the gas generated by the tank body 1, that is, the gas stirring device 3 is entered into the slurry liquid by the gas. It can be understood that when the amount of sludge is too large, the sludge in the tank body 1 will cross the preset liquid level and even submerge the connecting point. At this time, in order to facilitate the replacement of the gas stirring device 3, the water level of the sludge should be lowered by increasing the amount of water to be drained so that the water level of the sludge is lower than the preset liquid level.

[0037] The gas agitation device 3 has multiple options, for example, a bubble agitation device can be selected, which blows gas into the liquid in the form of bubbles through a gas distributor arranged in the liquid, and the bubbles drive the surrounding liquid to move during the rising process, thereby achieving the stirring effect. For example, as shown in Figures 1-4 The gas agitation device 3 selects a gas agitation pipe 31, which is located inside the tank body 1 and detachably connected with the gas inlet pipe 2. A plurality of gas holes are formed on the gas agitation pipe 31. The gas inlet pipe 2 guides the gas into the gas agitation pipe 31, which blows the gas to the liquid through the gas holes on the gas agitation pipe 31, thereby achieving the stirring effect on the liquid.

[0038] In order to improve the stirring effect of the gas agitation device 3, the gas agitation device 3 is also provided with a gas agitation vertical pipe 32, which extends into the bottom of the tank body 1. The gas agitation vertical pipe 32 is detachably connected with the gas agitation pipe 31 at the bottom of the tank body 1, and the other end is detachably connected with the gas inlet pipe 2. The gas agitation pipe 31 is placed at the bottom of the tank body 1 through the gas agitation vertical pipe 32, thereby increasing the stirring volume of the gas in the liquid, and significantly improving the stirring effect of the gas agitation pipe 31.

[0039] As shown in Figure 1 , Figure 3 and Figure 4 , the gas agitation vertical pipe 32 is provided with a plurality of gas agitation vertical pipes 32, which are detachably connected with the gas inlet pipe 2, and the gas agitation pipe 31 is detachably connected with the symmetrically arranged gas agitation vertical pipes 32 at both ends, that is, the gas agitation pipe 31 can realize air supply at both ends, thereby effectively avoiding the blockage of the gas agitation pipe 31

[0040] In order to facilitate the replacement of the gas agitation device 3 through the replacement opening 11, the gas agitation pipe 31 comprises an aeration hose, and the gas agitation vertical pipe 32 comprises a modified rubber pipe. The aeration hose uniformly disperses air in the form of small bubbles into water, and the gas transfer efficiency is high. At the same time, the aeration hose has good flexibility and can adapt to various types of tank bodies 1. After being connected with the modified rubber material gas agitation vertical pipe 32, it can still be directly pulled out through the replacement opening 11. The replacement of the rubber material gas agitation vertical pipe 32 and the gas agitation pipe 31 of the aeration hose is simple and convenient.

[0041] At the same time, due to the buoyancy effect in the liquid in the tank body 1, and in order to keep the position of the gas agitation pipe 31 unchanged before and after replacement, a stopper is arranged at the bottom of the tank body 1 to fix the gas agitation pipe 31 and keep the position unchanged before and after replacement of the gas agitation pipe 31.

[0042] There are various ways to achieve the detachable connection between the gas agitation vertical pipe 32 and the gas agitation pipe 31, for example, the flange connection, the flange plates are installed on the gas agitation pipe 31 and the gas agitation vertical pipe 32 respectively, the bolt holes and bolts are arranged on the flange plates, the two flange plates are tightly attached by tightening the bolts, thereby achieving the detachable connection between the gas agitation vertical pipe 32 and the gas agitation pipe 31, and for example, the clamp (not shown in the figure) is installed on the gas agitation vertical pipe 32, the clamp is sleeved on the outer wall of the gas agitation vertical pipe 32 and the gas agitation pipe 31, the clamp is shrunk by tightening the screws or clamps on the clamp, thereby achieving the detachable connection between the gas agitation vertical pipe 32 and the gas agitation pipe 31.

[0043] Similarly, the quick connector is installed between the gas inlet pipe 2 and the gas agitation vertical pipe 32, the quick connector detachably connects the gas inlet pipe 2 and the gas agitation vertical pipe 32, which facilitates the quick disassembly and installation of the gas agitation vertical pipe 32. The ball valve is also installed on the gas inlet pipe 2, which controls the opening and closing of the gas inlet pipe 2, facilitating the closing of the gas inlet pipe 2 during replacement.

[0044] As shown in Figure 2 The gas inlet pipe 2 includes the gas inlet main pipe 21 and the gas agitation branch pipe 22, the gas inlet main pipe 21 is sealingly arranged through the tank body 1, the gas agitation branch pipe 22 is located at the top of the tank body 1, the gas agitation branch pipe 22 is in communication with the gas inlet main pipe 21, the gas agitation branch pipe 22 is detachably connected with the gas agitation device 3, and the gas inlet main pipe 21 is connected with multiple gas agitation branch pipes 22 to increase the distribution range of the gas agitation device 3 and improve the effect of gas agitation

[0045] Further, in order to accelerate the discharge of the gas in the tank, the gas inlet main pipe 21 is also connected with the exhaust pipe 23, the exhaust pipe 23 extends to the top of the tank body 1, and the part of the exhaust pipe 23 located at the top of the tank body 1 is provided with a valve. When it is necessary to replace the gas agitation device 3, the valves of other pipelines are closed, the valve of the exhaust pipe 23 is opened, the external gas is introduced into the tank, and the discharge of the gas in the tank is accelerated. If necessary, a fan can be installed outside the exhaust pipe 23, and the fan can be used to transport the external air to the biogas above the liquid surface in the tank, thereby providing safe operating conditions for the subsequent replacement of the gas agitation device 3.

[0046] In order to save resource consumption and realize the reuse of the gas produced in the tank, the tank body 1 further includes a gas outlet pipe for guiding the gas produced in the tank body 1, the gas outlet pipe is in communication with the gas inlet pipe 2, the gas is collected and then circulated back to the system through the fan and the gas inlet pipe 2, and the gas is released into the water by the gas agitation equipment for pneumatic mixing and agitation.

[0047] Embodiment

[0048] The biogas main pipe 41 and the biogas branch pipe 42 are arranged outside the tank, the biogas branch pipe 42 is connected to the biogas branch pipe as a main pipe of the area needing to be gas stirred, each main pipe is connected from the lower part of the tank body 1 so that the corresponding valve is installed at a height convenient for the operator to operate, is connected to extend in the tank above the liquid level after installation, and a blind plate or plug is added at the end. The main pipe is connected to a plurality of gas stirring branch pipes 22, the gas stirring branch pipes 22 are provided with ball valves and quick connectors, and are connected with gas stirring vertical pipes 32, the gas stirring vertical pipes 32 are made of modified rubber material, vertically extend to the tank bottom, the bottom of the gas stirring vertical pipe 32 is connected with the gas stirring pipe 31 through adhesive tape and a clamp, and the gas stirring pipe 31 is connected with symmetrically arranged vertical pipes at both ends, so that air is circulated at both ends of the gas stirring pipe 31, and blockage of the gas stirring pipe 31 is effectively prevented.

[0049] A flange hole is arranged above the tank top at the joint of each gas stirring branch pipe 22 and the gas stirring vertical pipe 32, when the corresponding gas stirring pipe 31 needs to be replaced, the corresponding opposite flange hole can be opened at the tank top after the necessary pre-operation is completed to replace the gas stirring pipe 31.

[0050] The replacement method comprises the following steps: closing the ball valves at both ends, disassembling the quick connectors, connecting the new gas stirring vertical pipe 32+new gas stirring pipe 31 with the gas stirring vertical pipe 32, pulling the gas stirring vertical pipe 32 from the other end to take out the old gas stirring pipe 31, simultaneously using the limit stopper arranged at the bottom of the tank body 1 to make the new gas stirring pipe 31 be located at the corresponding position, restoring the quick connection after the replacement is completed, opening the ball valve, and closing the flange hole.

[0051] The biogas branch pipe 42 is connected to the tank through the gas inlet main pipe 21 and is separately connected with an exhaust pipe 23 to form an exhaust bypass pipe extending above the liquid level, and a valve is arranged on the part of the exhaust pipe 23 above the liquid level. When the valve is opened and other valves are closed, the gas is released to the liquid level through the exhaust pipe 23, which has two effects: one is that when the system is started for the first time or restarted after a long period of shutdown, the valve of the exhaust pipe 23 is opened first and then other valves are slowly opened, which can prevent the damage of instantaneous large gas volume to the tank body 1. Two is that when the gas stirring pipe 31 needs to be replaced without cleaning the tank, the opening of the valve is a necessary pre-operation, the tank top flange hole is opened, the valve of the exhaust pipe 23 is opened, other branch pipe valves are closed, air is sent into the tank by a fan to replace the biogas above the liquid level, and safe operation conditions are provided for the replacement of the subsequent gas stirring device 3.

[0052] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A continuous reaction system, characterized in that, The tank body is provided with a replacement opening in the upper portion, and a gas stirring device is arranged in the tank body and can be taken out from the replacement opening.

2. A continuous reaction system according to claim 1, wherein The gas stirring device comprises a gas stirring pipe arranged in the tank body and provided with a gas hole.

3. A continuous reaction system according to claim 2, wherein, The gas stirring device further comprises a gas stirring vertical pipe which extends into the bottom of the tank body and is detachably connected to the gas stirring pipe at one end and detachably connected to the gas inlet pipe at the other end.

4. A continuous reaction system according to claim 3, wherein, The gas stirring vertical pipe is provided with a plurality of gas stirring vertical pipes, and the replacement opening is provided with a plurality of corresponding positions.

5. A continuous reaction system according to claim 4, wherein, The gas stirring pipe and the gas stirring vertical pipe are both flexible pipes.

6. A continuous reaction system according to claim 5, wherein, The gas stirring vertical pipe is provided with a clamp which is detachably connected to the gas stirring vertical pipe and the gas stirring pipe.

7. A continuous reaction system according to claim 6, wherein, The gas inlet pipe is provided with a ball valve and a quick connector, the ball valve controls the opening and closing of the gas inlet pipe, and the quick connector is detachably connected to the gas inlet pipe and the gas stirring vertical pipe.

8. A continuous reaction system according to claim 1 wherein, The gas inlet pipe comprises a gas inlet main pipe and a gas stirring branch pipe, the gas inlet main pipe is arranged through the tank body, the gas stirring branch pipe is arranged in the tank body and is detachably connected to the gas inlet main pipe and the gas stirring device, and the connection point of the gas stirring branch pipe and the gas stirring device is located in the upper portion of the tank body.

9. A continuous reaction system according to claim 8, wherein, The gas inlet main pipe is further connected to a gas exhaust pipe which extends to the top of the tank body, and the portion of the gas exhaust pipe located at the top of the tank body is provided with a valve.

10. A continuous reaction system according to claim 1, wherein The tank body further comprises a gas outlet pipe which is used to guide the gas generated in the tank body and is connected to the gas inlet pipe.

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