A sewage treatment apparatus

Abstract

The application discloses a sewage treatment device and relates to the technical field of sewage treatment, and aims to solve the problems that an additive is difficult to diffuse to the whole pool body and it is difficult to make the sewage at each horizontal height of the pool body combine with the additive, and the technical scheme is as follows: a pool body with an openable and closable top surface, a stirring device rotatably arranged in the pool body, a channel in the stirring device and communicating with the pool body at both ends, an upper end opening of the channel being located above a liquid surface in the pool body, a slidable piston plate being sealingly arranged in the channel, the channel being divided into a gas cavity and a liquid cavity with variable volumes by the piston plate, the available volume of the gas cavity being increased and then restored when the combustible gas concentration in the gas cavity reaches a threshold value during the rotation of the stirring device, and the liquid cavity being connected with a liquid delivery hose for injecting the additive.The application can suck part of the sewage and combine the sewage with the additive during the rotation of the stirring device, and the combined sewage can be sprayed to the sewage at each position in the pool body, so that the waste of the additive is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment equipment, and particularly relates to a sewage treatment device. BACKGROUND

[0002] The construction of the sewage treatment device belongs to an extremely important and indispensable part. The main purpose is to carry out necessary pretreatment work on industrial sewage or domestic sewage to ensure that the sewage does not delay too much time when entering the subsequent sewage treatment plant, and effectively improves the efficiency and quality of sewage purification treatment.

[0003] The existing sewage treatment device is in the form of a sewage treatment tank, which includes a tank body excavated from the ground, a water inlet and a water outlet connected to the tank body, and a stirring device located in the center of the tank body and specially set for stirring. In the normal operation process of the sewage treatment tank, by adding an appropriate amount of flocculating agent and other additives to the sewage in the tank body, and by the action of the stirring device, the additives can be fully mixed with the sewage, and the insoluble impurities in the sewage can be agglomerated and precipitated.

[0004] Through this pretreatment work, the sewage treatment tank can effectively remove and separate solid particles and organic pollutants in the sewage to reduce the burden of the subsequent treatment process and ensure that the quality of the sewage meets the discharge standards and environmental requirements. Therefore, the sewage treatment tank plays an indispensable role in the entire municipal engineering and makes an important contribution to environmental protection and public health.

[0005] At present, since the dropping position of the additives in the tank body is relatively concentrated, even if stirring is carried out, due to the large volume of the tank body as a whole, the additives are difficult to diffuse to the entire tank body, and it is difficult to make the sewage at each horizontal height in the tank body combine with the additives, which ultimately leads to the need for a long time of sedimentation to complete the sedimentation treatment of the sewage, and the efficiency is generally poor. At present, there is no sewage treatment tank that can alleviate the above problems.

[0006] Therefore, a sewage treatment device is proposed to solve or alleviate the above problems. SUMMARY

[0007] The purpose of the present application is to solve the problems in the prior art, and a sewage treatment device is proposed, which uses the combustible gas such as biogas generated in the tank body as fuel, so that the stirring device can combine part of the sewage in the tank body with flocculating agent and other additives during rotation, and spray them to each part of the sewage. In this way, the flocculating agent and other additives can be fully combined with the sewage, avoiding the situation of dropping into only part of the sewage, thereby reducing the waste of flocculating agent and other additives, and at the same time, this treatment method also improves the treatment effect of the sewage treatment device.

[0008] In order to achieve the above object, the present application adopts the following technical scheme:

[0009] A sewage treatment device comprises a pool body with an openable and closable top surface, a stirring device rotatably arranged in the pool body, a channel in the stirring device, both ends of the channel being in communication with the pool body, the upper end opening of the channel being above the liquid surface in the pool body, a slidable piston plate being sealingly arranged in the channel, the channel being divided into a gas cavity with variable available volume and a liquid cavity by the piston plate, the available volume of the gas cavity being increased and then restored when the combustible gas concentration in the gas cavity reaches a threshold value during rotation of the stirring device, and the liquid cavity being in communication with a liquid delivery hose for injecting an additive.

[0010] The present application is further provided that the time for increasing the available volume of the gas cavity is less than the time for restoring the available volume of the gas cavity.

[0011] The present application is further provided that the available volume of the gas cavity is less than 1 / 6-1 / 3 of the available volume of the liquid cavity before the combustible gas concentration in the gas cavity reaches the threshold value.

[0012] The present application is further provided that the opening of the gas cavity is closed and then opened when the combustible gas concentration in the gas cavity reaches the threshold value, and an ignition element is arranged in the gas cavity, the ignition element igniting the combustible gas when the combustible gas concentration in the gas cavity reaches the threshold value.

[0013] The present application is further provided that the gas cavity is closed by an explosion-proof electromagnetic valve, and the ignition element is arranged between the piston plate and the explosion-proof electromagnetic valve, a gas concentration sensor is arranged in the channel between the upper end opening of the channel and the explosion-proof electromagnetic valve, the gas concentration sensor is connected with a controller, and the controller is connected with the explosion-proof electromagnetic valve and the ignition element.

[0014] The present application is further provided that the displacement process of the piston plate is between the opening of the gas cavity and the opening of the liquid cavity.

[0015] The present application is further provided that an elastic element is arranged in the channel, the elastic element is fixedly connected with the piston plate, and when the available volumes of the gas cavity and the liquid cavity change, the elastic element elastically deforms along the length direction of the channel, and the displacement of the piston plate is less than the maximum elastic deformation of the elastic element.

[0016] The present application is further provided that a limiting ring one and a limiting ring two are arranged in the channel, and the piston plate and the elastic element are arranged between the limiting ring one and the limiting ring two.

[0017] The present application is further provided that the limiting ring one is arranged above the limiting ring two, the elastic element is a compression spring, and the piston plate is located between the compression spring and the limiting ring one.

[0018] The present application has the following beneficial effects:

[0019] The present application can make full use of the combustible gas such as biogas generated in the pool as fuel, and in the process of rotating the stirring device, it not only draws part of the sewage in the pool, but also combines with the flocculant and other additives, and then sprays them to each area of the sewage, so that the flocculant and other additives can be fully combined with the sewage, avoiding the situation that the flocculant and other additives are only combined with part of the sewage, thereby reducing the waste of flocculant and other additives, and greatly improving the treatment effect of the sewage treater.

[0020] The implementation of this mechanism not only can effectively improve the mixing effect of flocculant and other additives with sewage, but also can supply sufficient heat energy and energy according to the combustible gas generated in the pool, further promoting the normal operation of the stirring device, and ensuring the continuity and efficiency of the treatment process.

[0021] Therefore, the present application has important significance in the field of sewage treatment, and by comprehensively utilizing the combustible gas such as biogas generated in the pool, the full mixing of flocculant and other additives with sewage is realized, the problems of incomplete combination and waste are avoided, and the overall performance and treatment effect of the sewage treater are significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic view of the present application;

[0023] Figure 2 is a partial sectional view of the present application;

[0024] Figure 3 is Figure 2 is an enlarged view of A in FIG. 1;

[0025] Figure 4 is Figure 2 is an enlarged view of B in FIG. 1;

[0026] Figure 5 is a sectional view of the present application;

[0027] Figure 6 is Figure 5 is an enlarged view of C in FIG. 1;

[0028] Figure 7 is Figure 5 is an enlarged view of D in FIG. 1;

[0029] Figure 8 is Figure 5 is an enlarged view of E in FIG. 1;

[0030] Figure 9 is Figure 5 is an enlarged view of F in FIG. 1;

[0031] Figure 10 is Figure 5Enlarged view at G.

[0032] In the figure: 1, pool body; 2, cover; 3, fixing frame; 4, motor; 5, three-way pipe; 6, explosion-proof electromagnetic valve; 7, connecting pipe; 8, clamping sleeve pipe joint; 9, connecting cylinder; 10, liquid port; 11, gas concentration sensor; 12, spark plug; 13, air inlet; 14, limit ring I; 15, piston plate; 16, compression spring; 17, limit ring II; 18, ball; 19, slide rail; 20, inlet pipe; 21, rotary pipe joint; 22, infusion hose. DETAILED DESCRIPTION

[0033] 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 are only part of the embodiments of the present application, not all.

[0034] A sewage treatment device, as shown in Figure 1 , 2 and 5, comprises a pool body 1 with an openable and closable top opening, and a stirring device rotatably arranged in the pool body 1. The inner bottom surface of the pool body 1 is fixedly connected with a circular annular slide rail 19, and the lower end of the stirring device is slidably connected in the slide rail 19. The stirring device can rotate in the pool body 1 to assist in stirring and mixing sewage and flocculants and other additives, accelerate the precipitation of large-particle impurities in the sewage, and facilitate the pre-treatment of the sewage in the pool body 1.

[0035] The stirring device comprises a three-way pipe 5 in the shape of a trident, a connecting pipe 7, a connecting cylinder 9, and a clamping sleeve pipe joint 8 connecting the connecting pipe 7 and the connecting cylinder 9. One of the three pipe openings of the three-way pipe 5 is vertically arranged, and the three pipe openings are uniformly and spacedly arranged. As shown in Figure 4 The remaining two pipe openings of the three-way pipe 5 are respectively communicated with the connecting pipe 7 through explosion-proof electromagnetic valves 6, and the explosion-proof electromagnetic valves 6 can control the on-off between the two.

[0036] As shown in Figure 3 and 6 , the vertically arranged pipe opening of the three-way pipe 5 is closed, and a plurality of air inlets 13 are formed in the side wall thereof, with the air inlets 13 being located above the liquid level in the pool body 1. A liquid port 10 is formed in the side wall of the connecting cylinder 9 and communicated with the inside thereof, and the three-way pipe 5, the connecting pipe 7, and the connecting cylinder 9 are internally communicated and form a channel with both ends communicated with the pool body 1, with the air inlets 13 and the liquid port 10 as the upper end opening and the lower end opening of the channel, respectively.

[0037] As shown in Figure 8 and 9As shown in the figure, and the channel is provided with a limit ring one 14 and a limit ring two 17, the limit ring one 14 is arranged above the limit ring two 17, specifically, the limit ring one 14 is welded on the inner wall of the connecting pipe 7, and the limit ring two 17 is integrally formed on the inner wall of the connecting pipe 7, and a slidable piston plate 15 is sealingly arranged in the channel, so that the channel is divided into a gas cavity and a liquid cavity with variable volume by the piston plate 15, and under the limitation of the limit ring one 14 and the limit ring two 17, the displacement process of the piston plate 15 is between the opening of the gas cavity and the opening of the liquid cavity, and an elastic member is arranged in the channel, specifically, the elastic member is a compression spring 16, the piston plate 15 is located between the compression spring 16 and the limit ring one 14, and the displacement of the piston plate 15 is less than the maximum elastic deformation of the compression spring 16, and in the normal state, that is, when the compression spring 16 is in the natural length state, the available volume of the gas cavity is less than 1 / 6-1 / 3 of the available volume of the liquid cavity, and the optimal state is 1 / 6.

[0038] Furthermore, as shown in the figure, Figure 4 and 9 The gas cavity is provided with an ignition member, specifically a spark plug 12, which is arranged between the piston plate 15 and the explosion-proof electromagnetic valve 6, and a gas concentration sensor 11 is arranged in the channel between its upper end opening and the explosion-proof electromagnetic valve 6, and the gas concentration sensor 11 detects the concentration of biogas, and the gas in the pool body 1 is mainly combustible gas such as oxygen and biogas, and the biogas comes from sewage.

[0039] The gas concentration sensor 11 is connected with a controller, the controller is connected with the explosion-proof electromagnetic valve 6 and the spark plug 12, the controller can be PLC, and the gas concentration sensor 11, the controller, the explosion-proof electromagnetic valve 6 and the spark plug 12 are all connected with an independent power supply, that is, a storage battery, and the gas concentration sensor 11, the controller, the explosion-proof electromagnetic valve 6 and the spark plug 12 are connected through a Bluetooth module, so that when the combustible gas concentration in the gas cavity detected by the gas concentration sensor 11 reaches the threshold value of the gas concentration sensor 11, the controller controls the explosion-proof electromagnetic valve 6 to close and then open, and when the combustible gas concentration in the gas cavity detected by the gas concentration sensor 11 reaches the threshold value of the gas concentration sensor 11, the controller controls the spark plug 12 to work after the explosion-proof electromagnetic valve 6 is closed, ignites the combustible gas, so that the piston plate 15 is displaced in the channel after the combustible gas in the gas cavity explodes, changes the available volumes of the gas cavity and the liquid cavity, and the time for increasing the available volume of the gas cavity is less than the time for recovering the available volume of the gas cavity.

[0040] As shown in the figure, Figure 10As shown, the bottom surface of the connecting cylinder 9 is fixedly connected with a ball seat, the ball seat is rollingly connected with a ball 18, the ball seat is embedded in a slide rail 19, and the ball 18 is in contact with the inner bottom surface of the slide rail 19, so that the lower end of the stirring device can be limited by the slide rail 19, and in the rotating process of the stirring device, it can be more stable. In addition, due to the ignition and explosion of the combustible gas in the stirring device, the stirring device will vibrate during the explosion, and the arrangement of the slide rail 19, the ball seat and the ball 18 ensures that the stirring device and the structure for driving the rotation of the stirring device will not only bear the vibration force of the stirring device at this position, thereby ensuring the stability of the structure of the entire stirring device and preventing damage.

[0041] As shown in the drawings, Figure 3 As shown, the cover 2 is provided with a through hole coaxially arranged with the slide rail 19, the top surface of the cover 2 is fixedly connected with a fixing frame 3, the fixing frame 3 can be fixed on the cover 2 by means of steel nails or the like, the fixing frame 3 is fixedly connected with a motor 4, the output shaft of the motor 4 is hollow, and the lower end of the output shaft of the motor 4 is fixedly connected with a vertically arranged pipe opening of a tee pipe 5, an inlet pipe 20 is arranged in the output shaft of the motor 4 and penetrates the tee pipe 5 into the pool body 1, and the inlet pipe 20 is sealed by an oil seal at the position penetrating the tee pipe 5, and as shown, Figure 7 As shown, the lower end of the inlet pipe 20 is connected with a "human" shaped infusion tube 22 through a rotary pipe joint 21, and the other two outlets of the infusion tube 22 are respectively connected to the liquid cavity. The inlet pipe 20, the rotary pipe joint 21 and the infusion tube 22 are used to accommodate flocculating agents and other additives.

[0042] In the process of treating sewage by the sewage treatment device, only the motor 4 needs to be powered. Once the motor 4 is powered, it will drive the tee pipe 5 fixedly connected with it to rotate through the output shaft. This rotating process will make the whole stirring device rotate, and the tee pipe 5 plays a driving role, effectively stirring the sewage in the pool body 1. In other words, through the cooperation of the motor 4 and the tee pipe 5, the sewage is successfully stirred and treated.

[0043] In the stirring process, in addition to the sewage treatment itself, flocculating agents and other additives will also be added. These additives enter the liquid cavity of the stirring device through the inlet pipe 20, the rotary pipe joint 21 and the infusion tube 22. When the stirring device starts to rotate, the additives will separate from the liquid cavity and disperse to various positions of the sewage in the pool body 1. In this way, the additives and the sewage can be better combined, and the solid particle impurities can be more easily formed into large particles and precipitated.

[0044] By introducing flocculants and other additives, the rotation of the stirring device not only fully stirs the sewage, but also provides good dispersion effect. When the sewage is combined with the additives, the solid particle impurities are more likely to coagulate to form larger precipitates for subsequent sedimentation treatment. Such stirring process not only enhances the sewage treatment effect, but also promotes the effective separation of solid particles, providing better conditions for sewage treatment.

[0045] However, due to the presence of sewage and the setting of the cover 2, the airflow cannot pass freely for a long time, and the dark and anaerobic state is maintained. In this case, the sewage must contain organic matter and microorganisms, which will cause more biogas in the pool body 1. In addition to combustible gases such as oxygen and hydrogen in the air, after a long time, the concentration of combustible gases in the pool body 1 will gradually increase.

[0046] At the same time, when the stirring device starts to rotate, due to the inlet on the side wall of the vertical pipe opening of the tee pipe 5, the tee pipe 5 with high speed forms a large airflow velocity, so that the airflow pressure is lower than that of other positions with low speed. In this case, the gas begins to gather towards the inlet position and partially enters the air cavity.

[0047] With the passage of time, when the gas concentration sensor 11 detects that the concentration reaches the set threshold value, it will transmit the signal to the controller through wireless connection. After receiving the signal, the controller controls the explosion-proof electromagnetic valve 6 to close and ignites the spark plug 12, thereby igniting the combustible gas in the air cavity and causing an explosion. Such explosion makes the gas expand, pushing the piston plate 15 to extrude the compression spring 16 and displace. Subsequently, the sewage mixed with flocculants and other additives in the liquid cavity is extruded by the piston plate 15 under high pressure, so that the sewage mixed with flocculants and other additives has a large mechanical potential energy. By spraying the sewage to different positions in the pool body 1, it is combined with the sewage at other positions in the pool body 1, so as to achieve the effect of fully mixing the sewage with flocculants and other additives.

[0048] In summary, the specific airflow state in the pool body 1 and the sewage treatment process enable the sewage to be better mixed with flocculants and other additives, further improving the efficiency of sewage treatment.

[0049] After the explosion ends, the controller controls the explosion-proof electromagnetic valve 6 to open, at which time the gas pressure is adjusted, and under the action of the elastic potential energy released by the compression spring 16, the piston plate 15 returns to the original state, and the piston plate 15 makes the liquid cavity available volume larger, thereby sucking the sewage in the pool body 1. This action occurs during the rotation of the stirring device, so it does not fixedly draw sewage from a certain place, but can draw sewage from any position to preliminarily combine with flocculants and other additives.

[0050] Therefore, the treatment method enables the sewage in the pool body 1 to preliminarily combine with the flocculating agent and other additives in the stirring device. Then, the sewage preliminarily combined with the flocculating agent and other additives is mixed with other sewage by using the combustible gas generated in the pool body 1 as fuel. This treatment method enables the flocculating agent and other additives to fully combine with the sewage in the pool body 1. However, if only a small amount of flocculating agent and other additives is sprayed, it is difficult to make the flocculating agent and other additives fully combine with the sewage in the pool body 1. Therefore, by mixing a small amount of sewage with the flocculating agent and other additives first, the amount of sprayed liquid can be increased, so that the liquid can be more easily sprayed to the sewage in each position in the pool body 1. This treatment method greatly improves the efficiency of sewage treatment and ensures that the flocculating agent and other additives can fully mix with the sewage in the pool body 1, further improving the sewage treatment effect.

[0051] The present application also provides a construction method of a sewage treatment device for constructing the above sewage treatment device, comprising the following steps,

[0052] Step 1, excavate the ground to form a pit connected with the pipeline, and build bricks on the bottom surface and inner wall of the pit, then fill the soil between the pit and the bricks, and coat the inner wall of the bricks with cement to form a pool body 1;

[0053] Step 2, install a slide rail 19 on the bottom surface of the pool body 1 by steel nails and reinforce it with cement;

[0054] Step 3, obtain a concrete prefabricated part as a cover 2, and fix a fixed frame 3 on the top surface of the cover 2 by steel nails to install a motor 4, the lower end of the motor 4 is connected with a stirring device, the cover 2 and the stirring device are lifted by a crane and dropped into the pool body 1 until the lower end of the stirring device is embedded in the slide rail 19, and the cover 2 closes the top surface of the pool body 1.

[0055] The sewage treatment device constructed by the above method greatly reduces the construction difficulty of the sewage treatment device, and does not need high-strength construction work, so that the construction difficulty of the sewage treatment device is reduced, and the sewage treatment device can be mass-produced and set in batches, and the influence of the structure immersed in the sewage is avoided, and the water and electricity contact is prevented.

[0056] And, after the sewage treater is constructed in this way, waste gas generated in multiple sewage can be fully utilized, thereby ensuring the sustainable utilization of energy. The waste gas generated in sewage will not be completely utilized in a short time, but can be maintained for a long time for sustainable development. Therefore, the sewage treater does not need to use other excess energy to drive, so as to fully stir the flocculating agent and other additives, and make the flocculating agent and other additives can be sprayed to each position in the pool body 1 and mixed with the sewage at each position. In this way, the sewage in the sewage treater can also be fully treated to ensure that the subsequent water leaving can be relatively kept in a clean state, and the utilization rate of the additive is improved.

[0057] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can make equivalent replacements or changes within the technical range disclosed by the present application according to the technical solution and inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A sewage treatment device, comprising a tank body (1) with an openable and closable top surface, and a stirring device rotatably arranged in the tank body (1), characterized in that: The stirring device has a channel communicated with the pool body (1) at both ends, and the upper end opening of the channel is located above the liquid level in the pool body (1). A slidable piston plate (15) is sealingly arranged in the channel. The channel is divided into a gas cavity with variable volume and a liquid cavity by the piston plate (15). When the combustible gas concentration in the gas cavity reaches a threshold value during the rotation of the stirring device, the available volume of the gas cavity is increased and then restored. The liquid cavity is communicated with a liquid infusion tube (22) for injecting an auxiliary agent. The opening of the gas cavity is closed and then opened when the combustible gas concentration in the gas cavity reaches the threshold value. An ignition member is arranged in the gas cavity. When the combustible gas concentration in the gas cavity reaches the threshold value, the ignition member ignites the combustible gas.

2. A sewage treatment unit as claimed in claim 1, wherein: The time for increasing the available volume of the gas cavity is less than the time for restoring the available volume of the gas cavity.

3. A sewage treatment apparatus as claimed in claim 1 or 2, wherein: The available volume of the gas cavity is less than 1 / 6-1 / 3 of the available volume of the liquid cavity before the combustible gas concentration in the gas cavity reaches the threshold value.

4. A sewage treatment unit as claimed in claim 1, wherein: The gas cavity is closed by an explosion-proof electromagnetic valve (6), and the ignition member is arranged between the piston plate (15) and the explosion-proof electromagnetic valve (6). A gas concentration sensor (11) is arranged in the channel between the upper end opening and the explosion-proof electromagnetic valve (6). The gas concentration sensor (11) is connected with a controller, and the controller is connected with the explosion-proof electromagnetic valve (6) and the ignition member.

5. A sewage treatment unit as claimed in claim 1, wherein: The displacement process of the piston plate (15) is between the opening of the gas cavity and the opening of the liquid cavity.

6. A sewage treatment apparatus as claimed in claim 5, wherein: An elastic member is arranged in the channel. The elastic member is fixedly connected with the piston plate (15), and when the available volumes of the gas cavity and the liquid cavity change, the elastic member elastically deforms along the length direction of the channel, and the displacement of the piston plate (15) is less than the maximum elastic deformation of the elastic member.

7. A sewage treatment apparatus as claimed in claim 6, wherein: Limiting ring one (14) and limiting ring two (17) are arranged in the channel. The piston plate (15) and the elastic member are arranged between the limiting ring one (14) and the limiting ring two (17).

8. A sewage treatment apparatus as claimed in claim 7, wherein: The limiting ring one (14) is arranged above the limiting ring two (17). The elastic member is a compression spring (16), and the piston plate (15) is located between the compression spring (16) and the limiting ring one (14).

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