CN111875045A - Anaerobic reactor and control method thereof - Google Patents

Abstract

The invention discloses an anaerobic reactor and a control method. The anaerobic reactor comprises: a tank body, a biogas pressure detector, a variable flow drainage device and a controller, and the tank body has a waste water inlet, a water outlet and a biogas outlet , the tank has a biogas chamber at the top, the biogas outlet is connected to the biogas chamber, the biogas pressure detector is used to detect the biogas pressure in the biogas chamber, the variable flow drainage device is connected to the water outlet, and the controller is connected to the biogas pressure detector and variable flow The drainage device is connected, and the controller controls the variable flow drainage device according to the biogas pressure detected by the biogas pressure detector to change the drainage flow to adjust the volume of the biogas chamber by adjusting the liquid level in the tank. According to the anaerobic reactor of the present invention, no additional Equipped with a biogas stabilizer or storage tank with variable volume, the structure is simple and the cost is low.

Description

Anaerobic reactor and control method thereof

technical field

The invention relates to the technical field of environmental protection, in particular, to an anaerobic reactor and a control method of the anaerobic reactor.

Background technique

Anaerobic reactor is a common equipment for treating wastewater. The anaerobic reactor utilizes the internal anaerobic sludge to convert COD in wastewater into biogas. In the related art, the biogas generated in the anaerobic reactor is introduced into the biogas pressure stabilizer or storage tank arranged outside the anaerobic reactor. Or the storage tank needs to be designed as a variable volume container, because it needs to be equipped with a biogas stabilizer or storage tank and the biogas stabilizer or storage tank needs to be designed as a volume container, resulting in an increase in cost, and the biogas from the anaerobic reactor to the anaerobic reactor. The transportation path of biogas tank or storage tank is long, the leakage point increases, and the risk is high.

SUMMARY OF THE INVENTION

The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

To this end, an embodiment of an aspect of the present invention provides an anaerobic reactor, which does not need to be equipped with a biogas pressure stabilizer or a storage tank, and has a simple structure and low cost.

An embodiment of another aspect of the present invention also provides a control method for an anaerobic reactor.

The anaerobic reactor according to the embodiment of the present invention includes: a tank body, the tank body has a waste water inlet, a water outlet and a biogas outlet, the tank body has a biogas chamber at the top, the biogas outlet is connected to the biogas chamber communication; a biogas pressure detector, which is used to detect the biogas pressure in the biogas chamber; a variable flow drainage device, which is connected to the water outlet; a controller, the controller Connected with the biogas pressure detector and the variable flow drainage device, the controller controls the variable flow drainage device to change the drainage flow according to the biogas pressure detected by the biogas pressure detector to adjust the drainage flow through the tank The liquid level in the body regulates the volume of the biogas chamber.

According to the anaerobic reactor of the embodiment, the pressure of the biogas space at the top of the tank is detected by the biogas pressure detector, and the drainage flow is changed by controlling the variable flow drainage device to control the liquid level in the tank, so that the volume of the biogas chamber can follow the biogas production. The gas volume changes according to the change of the gas volume, so as to achieve the functions of biogas voltage stabilization and buffer storage, and there is no need to configure additional biogas stabilization cabinets or storage tanks with variable volume. The structure is simple and the cost is low.

In some embodiments, the anaerobic reactor further includes a liquid level detector for detecting the liquid level in the tank, the controller is connected to the liquid level detector, and the controller according to the liquid level The liquid level detected by the level detector controls the variable flow drainage device to change the drainage flow.

In some implementations, the liquid level detector is an ultrasonic liquid level gauge or a pressure type liquid level gauge.

In some implementations, the biogas pressure sensor and the liquid level detector are provided on the outer top wall of the tank.

In some implementations, the controller controls the variable flow drainage device to increase the drainage flow when the biogas pressure detected by the biogas pressure detector is greater than a predetermined value and the biogas pressure detected by the biogas pressure detector is greater than a predetermined value. When less than a predetermined value, the variable flow drainage device is controlled to reduce the drainage flow.

In some implementations, the biogas outlet is provided on the top wall of the tank body, the water inlet is provided at the lower part of the peripheral wall of the tank body and adjacent to the bottom wall of the tank body, and the water outlet is provided on the bottom wall of the tank body the upper part of the peripheral wall of the tank body.

In some implementations, the variable flow drainage device is an adjustable valve or a variable capacity pump.

In some implementations, the tank body is provided with a water distribution pipe connected to the water inlet, and a backwash pipe connected to the water distribution pipe is provided outside the tank body.

In some implementations, the anaerobic reactor further includes a return pump, the tank body has a return port, a water inlet of the return pump is connected to the return port, and a water outlet of the return pump is connected to the waste water inlet.

The control method of the anaerobic reactor proposed according to the embodiment of the second aspect of the present invention comprises the following steps:

detecting the biogas pressure in the biogas chamber in the anaerobic reactor;

The drainage flow of the anaerobic reactor is adjusted according to the detected pressure of the biogas in the biogas chamber to adjust the liquid level in the tank, thereby adjusting the volume of the biogas chamber.

According to the control method of the anaerobic reactor proposed by the embodiment of the second aspect of the present invention, the pressure of the biogas space at the top is measured, and the drainage flow of the anaerobic reactor is adjusted through the biogas pressure to adjust the liquid level in the tank, thereby adjusting The volume of the biogas chamber achieves the functions of biogas voltage stabilization and buffer storage, no biogas stabilization cabinet or storage tank is required, and the structure is simple and the cost is low.

In some embodiments, the control method of the anaerobic reactor further comprises:

Detecting the liquid level in the anaerobic reactor; according to the detected liquid level in the anaerobic reactor, adjusting the drainage flow of the anaerobic reactor to control the liquid level in the anaerobic reactor always higher than the water outlet of the anaerobic reactor.

In some embodiments, the drain flow of the anaerobic reactor is increased when the detected biogas pressure is greater than a predetermined value and the drain flow of the anaerobic reactor is increased when the detected biogas pressure is less than a predetermined value .

In some embodiments, a portion of the water in the upper portion of the anaerobic reactor is returned to the lower portion of the anaerobic reactor.

Description of drawings

FIG. 1 is a schematic diagram of an anaerobic reactor according to an embodiment of the present invention.

Reference number:

Tank 1, waste water inlet 101, water outlet 102, biogas outlet 103, return port 104, biogas pressure detector 2, variable flow drainage device 3, liquid level detector 4, water distribution pipe 5, backwash pipe 6, return pump 7. Controller 8, water inlet pipe 9, biogas chamber 10.

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

The anaerobic reactor according to the embodiment of the present invention includes: a tank 1 , a biogas pressure detector 2 , a variable flow drainage device 3 and a controller 8 .

The tank body 1 has a wastewater inlet 101, a water outlet 102 and a biogas outlet 103, and the tank body 1 has a biogas chamber 10 at the top. In other words, the top space of the inner cavity of the tank body 1 serves as a space for storing biogas. The liquid level in the tank 1 defines that, when the liquid level in the tank 1 changes, the volume of the biogas chamber 10 changes. The biogas outlet 103 communicates with the biogas chamber 10 . The biogas pressure detector 2 is used to detect the biogas pressure in the biogas chamber 10 . The variable flow drainage device 3 is connected to the water outlet 102 for discharging the treated water. The controller 8 is connected with the biogas pressure detector 2 and the variable flow drainage device 3. The controller 8 controls the variable flow drainage device 3 to change the drainage flow according to the biogas pressure detected by the biogas pressure detector 2, thereby adjusting the flow rate in the tank 1. liquid level, and then adjust the volume of the biogas chamber 10 .

According to the anaerobic reactor of the embodiment of the present invention, the pressure in the top biogas space (ie the biogas chamber) in the tank is detected by the biogas pressure detector, and the controller controls the variable flow drainage device to change the drainage flow by detecting the biogas pressure, thereby The liquid level in the tank is controlled, so that the volume of the biogas chamber changes with the change of the biogas production, so as to achieve the functions of biogas pressure stabilization and buffer storage, without the need to configure a variable volume biogas stabilizer or storage tank, with simple structure and low cost.

In some embodiments, the anaerobic reactor further includes a liquid level detector 4 for detecting the liquid level in the tank body 1 , the controller 8 is connected to the liquid level detector 4 , and the controller 8 detects the liquid level according to the liquid level detector 4 . The reached liquid level is controlled by the variable flow drainage device 3 to change the drainage flow so that the water level in the tank is within a preset range. Biogas leaks from the water outlet 102, which improves the safety of the anaerobic reactor. On the other hand, when the biogas pressure sensor 2 fails and cannot detect the pressure in the biogas chamber, it can be avoided that the variable flow drainage device 3 keeps reducing the displacement Cause the water level to be too high to avoid overflow accidents.

Preferably, the variable flow drainage device 3 may be an adjustable valve or a variable capacity pump.

In some implementations, the liquid level detector 4 is an ultrasonic liquid level gauge or a pressure type liquid level gauge. Of course, the present invention is not limited to this.

In some implementations, the biogas pressure sensor 2 and the liquid level detector 4 are arranged on the outer top wall of the tank body 1, and the biogas pressure sensor 2 can detect the biogas pressure in the biogas chamber 10 in real time, and convert the biogas pressure value into an electrical signal It is transmitted to the controller 8, and the liquid level detector 4 can detect the liquid level in the tank 1 in real time, and convert the liquid level information into electrical signals and transmit it to the controller 8. The detection information of 2 controls the opening degree of the variable flow drainage device 3, that is, the drainage flow rate. Therefore, the volume of the biogas chamber 10 can be changed with the change of the biogas production volume, so as to achieve the functions of biogas voltage stabilization and buffer storage.

In some implementations, the controller 8 controls the variable flow drainage device 3 to increase the drainage flow when the biogas pressure detected by the biogas pressure detector 2 is greater than a predetermined value, and the biogas pressure detected by the biogas pressure detector 2 is less than the predetermined value. , control the variable flow drainage device 3 to reduce the drainage flow. In other words, when the measured biogas pressure value is greater than the predetermined value, by increasing the opening of the variable flow drainage device 3 to increase the drainage flow, the volume of the biogas chamber 10 increases, thereby reducing the biogas pressure to the predetermined value, and vice versa.

In some implementations, the biogas outlet 103 is provided on the top wall of the tank body 1, the biogas outlet 103 is connected to the inside and outside of the tank body 1, the biogas outlet 103 is provided with a control valve for controlling the discharge flow of biogas, and the water inlet is provided in the tank body 1 The lower part of the peripheral wall of the tank body 1 is adjacent to the bottom wall of the tank body 1 , and the water outlet 102 is provided on the upper part of the peripheral wall of the tank body 1 .

In some implementations, the tank body 1 is provided with a water distribution pipe 5 connected with the water inlet, the outside of the tank body 1 is provided with a water inlet pipe 9 connected with the water inlet, and the outside of the tank body 1 is provided with a backwash pipe connected with the water distribution pipe 5 6. The water distribution pipe 5 can make the waste water enter the tank body 1 evenly, and the backwash pipe 6 can flush the water distribution pipe to prevent clogging.

In some implementations, the anaerobic reactor further includes a return pump 7, the tank body 1 has a return port 104, the return port 104 is provided at the upper part of the peripheral wall of the tank body 1, and the height of the return port 104 is lower than the height of the water outlet 102, and the return port 104 The water inlet of the pump 7 is connected to the return port 104 , and the water outlet 102 of the return pump 7 is connected to the waste water inlet 101 . Through the return pump 7 and the return port 104, a part of the water in the upper part of the tank body 1 is transported to the bottom of the tank body 1. By setting the return pump, on the one hand, when the wastewater pollution concentration is high or the water quality fluctuates, it can be adjusted to enter the tank body. 1; on the other hand, the stirring energy of the incoming water can be increased through the reflux cycle, the stirring effect can be improved, and the wastewater treatment effect can be improved.

Anaerobic reactors according to some specific examples of the present invention are described below with reference to FIG. 1 .

In some specific examples, the anaerobic reactor includes: a tank 1 , a biogas pressure detector 2 , a variable flow drainage device 3 , a liquid level detector 4 and a controller 8 .

The tank body 1 has a waste water inlet 101, a water outlet 102 and a biogas outlet 103, and the tank body 1 has a biogas chamber 10 at the top, the biogas outlet 103 is communicated with the biogas chamber 10, and the biogas outlet 103 is provided on the top wall of the tank body 1 and The biogas outlet 103 is provided with a valve for controlling the discharge amount of biogas. The biogas pressure detector 2 is used to detect the biogas pressure in the biogas chamber 10 , the liquid level detector 4 is used to detect the liquid level in the tank body 1 , and the biogas pressure sensor 2 and the liquid level detector 4 are both arranged outside the tank body 1 . on the top wall.

The variable flow drainage device 3 is connected to the water outlet 102 . The controller 8 is connected with the biogas pressure detector 2, the variable flow drainage device 3 and the liquid level detector 4. The controller 8 is based on the biogas pressure detected by the biogas pressure detector 2 and the liquid level detected by the liquid level detector 4, Control the opening of the variable flow drainage device 3 to change the drainage flow, thereby adjusting the liquid level in the tank 1, and then adjust the volume of the biogas chamber 10. It should be understood that no matter how the variable flow drainage device 3 is adjusted The liquid level in the tank 1 changes, the liquid level in the tank 1 is always higher than the water outlet 102, and the liquid level in the tank 1 should not be too high. For example, when the biogas pressure detector 2 fails, it cannot be detected. When the pressure of the biogas is high, the variable flow drainage device 3 changes the flow rate based on the detection value of the liquid level detector 4 so that the water level cannot be too high and an overflow accident occurs.

The tank body 1 is also provided with a water distribution pipe 5 connected with the water inlet, and a backwash pipe 6 connected with the water distribution pipe 5 is provided outside the tank body 1 . The anaerobic reactor also includes a return pump 7, the tank body 1 has a return port 104, the return port 104 is arranged on the upper part of the peripheral wall of the tank body 1 and the height of the return port 104 is lower than the height of the water outlet 102, the water inlet of the return pump 7 Connected to the return port 104 , the water outlet 102 of the return pump 7 is connected to the waste water inlet 101 .

The operation process of the anaerobic reactor according to the embodiment of the present invention will be described below with reference to FIG. 1 .

The wastewater enters the tank 1 through the water inlet, and is evenly distributed in the tank 1 through the water distribution pipe 5. The internal anaerobic sludge is used to treat the wastewater in the tank 1, and biogas is generated at the same time, and the biogas converges to the tank 1. In the biogas chamber 10 at the inner top, the biogas pressure sensor 2 detects the biogas pressure in the biogas chamber 10. When the detected biogas pressure value is greater than the predetermined value, the controller controls the variable flow drainage device 3 to increase the drainage flow. When the pressure of the biogas is increased, the liquid level in the tank body 1 drops, and the volume of the biogas chamber 10 becomes larger to adapt to the change of the biogas pressure. When the biogas pressure detected by the biogas pressure detector 2 is less than the predetermined value, the controller controls the variable flow drainage device. 3. Reduce the drainage flow. After the drainage volume is reduced, the liquid level in the tank 1 rises, and the volume of the biogas chamber 10 becomes smaller to adapt to changes in the pressure of the biogas, thereby stabilizing the pressure of the biogas. When the liquid level detector 4 detects that the liquid level in the tank body 1 is higher than a predetermined value, the variable flow drainage device 3 increases the drainage flow to avoid overflow accidents caused by the high liquid level. .

The control method of the anaerobic reactor according to the embodiment of the present invention is described below. The control method of the anaerobic reactor according to the embodiment of the present invention includes the following steps:

Detect the biogas pressure in the biogas chamber 10 in the anaerobic reactor, and then adjust the drainage flow of the anaerobic reactor according to the detected biogas pressure in the biogas chamber 10 to adjust the liquid level in the anaerobic reactor, thereby adjusting the biogas chamber 10 volumes.

According to the control method of the anaerobic reactor according to the embodiment of the present invention, by detecting the biogas pressure in the biogas space at the top, adjusting the drainage flow of the anaerobic reactor to adjust the liquid level in the anaerobic reactor, thereby adjusting the volume of the biogas chamber to achieve The functions of biogas stabilization and buffering do not need to configure a biogas stabilization cabinet or storage tank with variable volume, and the structure is simple and the cost is low.

In some embodiments, the control method of the anaerobic reactor further comprises detecting the liquid level in the anaerobic reactor; and adjusting the drainage flow of the anaerobic reactor according to the detected liquid level in the anaerobic reactor to control the anaerobic reactor The liquid level in the reactor is always higher than the water outlet of the anaerobic reactor.

In some embodiments, the drain flow of the anaerobic reactor is increased when the detected biogas pressure is greater than a predetermined value and the drain flow of the anaerobic reactor is increased when the detected biogas pressure is less than the predetermined value.

In some embodiments, a portion of the water in the upper portion of the anaerobic reactor is returned to the lower portion of the anaerobic reactor.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial, The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated devices or elements. It must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection or can communicate with each other; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between the two components, unless otherwise expressly qualified. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may be in direct contact between the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" and the like mean a specific feature, structure, material, or description described in connection with the embodiment or example. Features are included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

Although the embodiments of the present invention have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and should not be construed as limiting the present invention. Embodiments are subject to variations, modifications, substitutions and variations.

Claims (13)

1. an anaerobic reactor, is characterized in that, comprises: a tank body, the tank body has a waste water inlet, a water outlet and a biogas outlet, the tank body has a biogas chamber at the top, and the biogas outlet communicates with the biogas chamber; a biogas pressure detector, the biogas pressure detector is used to detect the biogas pressure in the biogas chamber; a variable flow drainage device, the variable flow drainage device is connected to the water outlet; a controller, the controller is connected to the biogas pressure detector and the variable flow drainage device, the controller controls the variable flow drainage device to change the drainage according to the biogas pressure detected by the biogas pressure detector The flow is to adjust the volume of the biogas chamber by adjusting the liquid level in the tank. 2 . The anaerobic reactor according to claim 1 , further comprising a liquid level detector for detecting the liquid level in the tank, and the controller is connected with the liquid level detector, 2 . The controller controls the variable flow drainage device to change the drainage flow according to the liquid level detected by the liquid level detector. 3 . The anaerobic reactor according to claim 2 , wherein the liquid level detector is an ultrasonic liquid level gauge or a pressure type liquid level gauge. 4 . 4 . The anaerobic reactor according to claim 2 , wherein the biogas pressure sensor and the liquid level detector are arranged on the outer top wall of the tank. 5 . 5. The anaerobic reactor according to any one of claims 1-4, wherein the controller controls the variable flow rate when the biogas pressure detected by the biogas pressure detector is greater than a predetermined value The drainage device increases the drainage flow and controls the variable flow drainage device to decrease the drainage flow when the biogas pressure detected by the biogas pressure detector is less than a predetermined value. 6 . The anaerobic reactor according to claim 1 , wherein the biogas outlet is provided on the top wall of the tank body, and the water inlet is provided on the lower part of the peripheral wall of the tank body and adjacent to the the bottom wall of the tank body, and the water outlet is arranged on the upper part of the peripheral wall of the tank body. 7 . The anaerobic reactor according to claim 1 , wherein the variable flow drainage device is an adjustable valve or a variable capacity pump. 8 . 8 . The anaerobic reactor according to claim 1 , wherein the tank body is provided with a water distribution pipe connected to the water inlet, and the The backwash pipe connected to the water distribution pipe. 9 . The anaerobic reactor according to claim 1 , further comprising a return pump, the tank body has a return port, and a water inlet of the return pump is connected to the return port. 10 . , the water outlet of the return pump is connected to the waste water inlet. 10. A control method of an anaerobic reactor, characterized in that, comprising the following steps: detecting the biogas pressure in the biogas chamber in the anaerobic reactor; The drainage flow of the anaerobic reactor is adjusted according to the detected pressure of the biogas in the biogas chamber to adjust the liquid level in the anaerobic reactor, thereby adjusting the volume of the biogas chamber. 11. The control method of an anaerobic reactor according to claim 10, characterized in that, further comprising: detecting the liquid level in the anaerobic reactor; According to the detected liquid level in the anaerobic reactor, the drainage flow of the anaerobic reactor is adjusted to control the liquid level in the anaerobic reactor to be always higher than the water outlet of the anaerobic reactor. 12. The control method of an anaerobic reactor according to claim 10, wherein when the detected pressure of biogas is greater than a predetermined value, the drainage flow of the anaerobic reactor is increased and when the detected pressure of biogas is greater than a predetermined value When it is less than a predetermined value, the drainage flow of the anaerobic reactor is increased. 13 . The method for controlling an anaerobic reactor according to claim 10 , wherein a part of the water in the upper part of the anaerobic reactor is returned to the lower part in the anaerobic reactor. 14 .

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