Gas production rate metering device for producing biogas through continuous feeding and use method of gas production rate metering device

Abstract

The invention discloses a gas production rate metering device for continuous feeding biogas production and a use method, and belongs to the technical field of biogas production metering. The problems of negative pressure in the tank and inaccurate gas production metering during discharging in the prior art are solved. According to the technical scheme, the device comprises an anaerobic fermentation tank, a pressure gauge, a flow meter, an air pump, an air collection bag and an air storage bag, air produced by the anaerobic fermentation tank enters the air collection bag, the air in the air collection bag is emptied during feeding and discharging and stored in the air storage bag, and the pressure in the tank is kept stable by adjusting a valve. The metering device can accurately meter daily gas yield or hourly gas yield, can solve the problem that safety is affected by gas leakage and gas inlet due to the fact that the pressure in the tank is too large and too small and unstable during feeding and discharging, improves the stability of the metering device, effectively improves the biogas yield, and has wide market prospects.

Description

Technical Field

[0001] The invention relates to the technical field of biogas production metering, and in particular to a gas production metering device for continuously feeding biogas and a use method thereof. Background Art

[0002] Biogas is a mixed gas produced by the fermentation of organic waste, with the main components being methane and carbon dioxide. During the biogas fermentation process, the gas produced needs to be accurately measured in order to control the production process, evaluate production capacity, and monitor gas quality. Biogas production measurement methods usually include volume measurement and mass measurement.

[0003] Volumetric measurement is to determine the gas production by measuring the volume of biogas. Commonly used volumetric measurement methods include float flowmeter, turbine flowmeter, etc. Mass measurement is to determine the gas production by measuring the methane content or calorific value in the biogas. Commonly used mass measurement methods include gas chromatography, calorific value method, etc. Selecting the appropriate biogas production measurement method is crucial to ensure the stability and reliability of the biogas production process.

[0004] In the existing technology, there are some problems in the anaerobic fermentation process, such as unstable fermentation efficiency and large differences in product quality. The activity of biochar and its adsorption properties have a significant impact on the fermentation effect. Traditional anaerobic fermentation methods often ignore the pretreatment of biochar and its dynamic regulation with the fermentation process, resulting in unstable fermentation efficiency and difficult to control product quality. At present, there are still some problems in the research on the application of ultrasound in biochar modification and anaerobic fermentation, such as the selection and optimization of ultrasound parameters, and the coupling mechanism of ultrasound treatment and fermentation process is still unclear.

[0005] Therefore, it is urgent to propose a gas production metering device and a method for using the biogas produced by continuous feeding to solve the problems of negative pressure in the tank and inaccurate gas production metering during discharge. Summary of the invention

[0006] In view of the above facts, in order to solve the problems of negative pressure in the tank and inaccurate gas production metering during discharge, the present invention further designs a gas production metering device and a method for using the continuous feeding biogas production.

[0007] To achieve the above object, the present invention adopts the following technical solution:

[0008] Solution 1: A gas production metering device for continuous feeding biogas production, including an anaerobic fermentation tank, a pressure gauge, a flow meter, an air pump, an air collection bag, and an air storage bag;

[0009] The anaerobic fermentation tank is connected in sequence to an air collecting bag, a first solenoid valve, a flow meter, an air pump, a second solenoid valve, and an air storage bag through a first pipeline;

[0010] The left side of the second pipeline is connected to the anaerobic fermentation tank, and the right side is connected to the first pipeline, the connection point is between the air pump and the second solenoid valve, and the third solenoid valve is installed on the second pipeline;

[0011] A fourth solenoid valve is installed on the third pipeline, the left side of which is connected to the first pipeline, the left connection point of which is between the first solenoid valve and the flow meter, and the right side of which is connected to the first pipeline, the right connection point of which is between the second solenoid valve and the air storage bag;

[0012] A fifth solenoid valve is installed on the fourth pipeline, the left side of which is connected to the first pipeline, the left connection point of which is between the flow meter and the air pump, and the right side of which is connected to the second pipeline, the right connection point of which is between the third solenoid valve and the right connection point of the second pipeline;

[0013] The left side of the anaerobic fermentation tank is connected to a fifth pipeline, and the fifth pipeline is equipped with an inlet and outlet valve;

[0014] The air collecting bag is connected with a pressure gauge.

[0015] Scheme 2: A method for measuring the gas production of biogas produced by continuous feeding, which is implemented by relying on a gas production measuring device for biogas produced by continuous feeding as described in Scheme 1, and the specific steps are as follows:

[0016] Step 1: The anaerobic digester produces gas, and the gas enters the gas collecting bag;

[0017] Step 2: When the pressure gauge detects the pressure, the first solenoid valve and the second solenoid valve are opened, and the air pump works to flow the gas in the air collecting bag into the air storage bag through the air pump;

[0018] Step 3: When the pressure gauge shows a slight negative pressure, the air pump stops working and closes the first solenoid valve and the second solenoid valve;

[0019] Step 4: Empty the gas in the gas collecting bag and store it in the gas storage bag, open the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve, open the inlet and outlet valves, and start discharging;

[0020] Step 5. The anaerobic digester starts feeding. When the pressure gauge shows pressure, open the first solenoid valve, the second solenoid valve and the fifth solenoid valve. When the flow meter reaches the accumulated flow rate, stop feeding, close all valves, open the first solenoid valve and the second solenoid valve, turn on the air pump, and when the pressure gauge shows a slight negative pressure, stop the air pump and close all solenoid valves.

[0021] Furthermore: in step 1, the volume of the air collection bag is selected according to the daily feed amount, and the volume of the air collection bag is the daily feed amount divided by 4.

[0022] Furthermore, during the discharge process of step 4, the flow meter counts the gas in the gas storage bag to supplement the discharge volume in the anaerobic digestion tank, and the statistical result minus the volume of the gas collection bag is L.

[0023] Furthermore: when the accumulated flow rate of the flow meter in step 5 is L, the feeding is stopped.

[0024] Furthermore: the values ​​of pressure and slight negative pressure are both 2KPa.

[0025] The beneficial effects of the present invention are:

[0026] 1. The present invention has high measurement accuracy and can accurately measure daily gas production and hourly gas production.

[0027] 2. The present invention solves the problem of air leakage and air intake affecting safety due to the unstable pressure in the tank during feeding and discharging.

[0028] 3. The present invention effectively improves the utilization efficiency of biogas and facilitates the fermentation of organic waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the present invention.

[0030] In the figure: 1-anaerobic digestion tank, 2-air collecting bag, 3-flow meter, 4-air pump, 5-air storage bag, 6-pressure gauge, 7-first solenoid valve, 8-second solenoid valve, 9-third solenoid valve, 10-fourth solenoid valve, 11-fifth solenoid valve, 12-inlet and outlet valves. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with 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 of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] In the present application, the directions or positional relationships indicated by the terms "upper", "lower", "inner", "middle", "outer", "front", "back", etc. are based on the directions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific direction, or to be constructed and operated in a specific direction.

[0034] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0037] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] Embodiment 1: A gas production metering device for continuous feeding biogas production in this embodiment includes an anaerobic fermentation tank 1, a pressure gauge 6, a flow meter 3, an air pump 4, an air collection bag 2, and an air storage bag 5;

[0039] The anaerobic fermentation tank 1 is connected to the air collecting bag 2, the first solenoid valve 7, the flow meter 3, the air pump 4, the second solenoid valve 8, and the air storage bag 5 in sequence through the first pipeline;

[0040] The left side of the second pipeline is connected to the anaerobic fermentation tank 1, and the right side is connected to the first pipeline, and the connection point is between the air pump 4 and the second solenoid valve 8. The third solenoid valve 9 is installed on the second pipeline;

[0041] A fourth solenoid valve 10 is installed on the third pipeline, the left side of which is connected to the first pipeline, the left connection point of which is between the first solenoid valve 7 and the flow meter 3, and the right side of which is connected to the first pipeline, the right connection point of which is between the second solenoid valve 8 and the air storage bag 5;

[0042] A fifth solenoid valve 11 is installed on the fourth pipeline, the left side of which is connected to the first pipeline, the left connection point of which is between the flow meter 3 and the air pump 4, and the right side of which is connected to the second pipeline, the right connection point of which is between the third solenoid valve 9 and the right connection point of the second pipeline;

[0043] The left side of the anaerobic fermentation tank 1 is connected to a fifth pipeline, and the fifth pipeline is installed with an inlet and outlet valve 12;

[0044] The air collecting bag 2 is connected with a pressure gauge 6 .

[0045] Embodiment 2: A method for measuring the gas production of biogas produced by continuous feeding, which is implemented by relying on a gas production measuring device for biogas produced by continuous feeding as described in Scheme 1, and the specific steps are as follows:

[0046] Step 1, the anaerobic digestion tank 1 produces gas, and the gas enters the gas collecting bag 2;

[0047] Step 2, when the pressure gauge 6 detects the pressure, the first solenoid valve 7 and the second solenoid valve 8 are opened, the air pump 4 works, and the gas in the air collecting bag 2 flows into the air storage bag 5 through the air pump 4;

[0048] Step 3: When the pressure gauge 6 shows a slight negative pressure, the air pump 4 stops working, and the first solenoid valve 7 and the second solenoid valve 8 are closed;

[0049] Step 4, open the first solenoid valve 7 and the second solenoid valve 8, empty the gas in the gas collecting bag 2 and store it in the gas storage bag 5, open the third solenoid valve 9, the fourth solenoid valve 10 and the fifth solenoid valve 11, open the inlet and outlet valve 12, and start discharging;

[0050] Step 5, the anaerobic digestion tank 1 starts to feed. When the pressure gauge 6 shows pressure, the first solenoid valve 7, the second solenoid valve 8 and the fifth solenoid valve 11 are opened. When the flow meter 3 accumulates the flow to a certain amount, the feeding is stopped, all valves are closed, the first solenoid valve 7 and the second solenoid valve 8 are opened, and the air pump 4 is turned on. When the pressure gauge 6 shows a slight negative pressure, the air pump 4 is stopped and all solenoid valves are closed.

[0051] More specifically: in step 1, the volume of the air collecting bag 2 is selected according to the daily feed amount, and the volume of the air collecting bag 2 is the daily feed amount divided by 4.

[0052] More specifically: Another function of the air pump 4 in step 2 is to verify the statistical results of the gas flow meter 3 through the working time. If the error is greater than 3%, the flow meter needs to be replaced or recalibrated.

[0053] More specifically: during the discharge process of step 4, the flow meter 3 counts the gas in the gas storage bag 5 to supplement the discharge volume in the anaerobic digestion tank 1, and the result of the count minus the volume of the gas collection bag 2 is L.

[0054] More specifically: when the accumulated flow rate of the flow meter 3 in step 5 is L, the feeding is stopped.

[0055] More specifically: the values ​​of pressure and slight negative pressure are both 2KPa.

[0056] More specifically: the pressure gauge 6 displays the values ​​of the anaerobic digestion tank 1 and the air collecting bag 2, and no gas is produced when there is a slight negative pressure.

[0057] More specifically: the purpose of the third solenoid valve 9, the fourth solenoid valve 10 and the fifth solenoid valve 11 is to adjust the pressure in the tank to prevent explosion due to excessively high or low pressure, and to prevent excessively low pressure from replenishing gas and excessively high pressure from exhausting gas.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. As long as there is no structural conflict, the various features in the specific implementation methods disclosed in this application can be combined with each other in any way, and the essence of the corresponding technical solutions will not deviate from the scope of the technical solutions of the present invention.

[0059] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A gas production metering device for continuous feeding biogas production, characterized in that: It comprises an anaerobic fermentation tank (1), a pressure gauge (6), a flow meter (3), an air pump (4), an air collecting bag (2), and an air storage bag (5); The anaerobic fermentation tank (1) is connected in sequence to an air collection bag (2), a first electromagnetic valve (7), a flow meter (3), an air pump (4), a second electromagnetic valve (8), and an air storage bag (5) via a first pipeline; The left side of the second pipeline is connected to the anaerobic fermentation tank (1), and the right side is connected to the first pipeline, and the connection point is between the air pump (4) and the second solenoid valve (8). A third solenoid valve (9) is installed on the second pipeline; A fourth solenoid valve (10) is installed on the third pipeline, the left side of which is connected to the first pipeline, the left connection point being between the first solenoid valve (7) and the flow meter (3), and the right side of which is connected to the first pipeline, the right connection point being between the second solenoid valve (8) and the air storage bag (5); A fifth solenoid valve (11) is installed on the fourth pipeline, the left side of which is connected to the first pipeline, the left connection point of which is between the flow meter (3) and the air pump (4), and the right side of which is connected to the second pipeline, the right connection point of which is between the third solenoid valve (9) and the right connection point of the second pipeline; The left side of the anaerobic fermentation tank (1) is connected to a fifth pipeline, and the fifth pipeline is equipped with an inlet and outlet valve (12); The air collecting bag (2) is connected to a pressure gauge (6).

2. A method for measuring the gas production of biogas produced by continuous feeding, which is realized by relying on a gas production measuring device for biogas produced by continuous feeding as described in Scheme 1, and the specific steps are as follows: Step 1: The anaerobic digester produces gas, and the gas enters the gas collecting bag; Step 2: When the pressure gauge detects the pressure, the first solenoid valve and the second solenoid valve are opened, and the air pump works to flow the gas in the air collecting bag into the air storage bag through the air pump; Step 3: When the pressure gauge shows a slight negative pressure, the air pump stops working and closes the first solenoid valve and the second solenoid valve; Step 4, open the first solenoid valve and the second solenoid valve, empty the gas in the gas collection bag and store it in the gas storage bag, open the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve, open the inlet and outlet valves, and start discharging; Step 5. The anaerobic digester starts feeding. When the pressure gauge shows pressure, open the first solenoid valve, the second solenoid valve and the fifth solenoid valve. When the flow meter reaches the accumulated flow rate, stop feeding, close all valves, open the first solenoid valve and the second solenoid valve, turn on the air pump, and when the pressure gauge shows a slight negative pressure, stop the air pump and close all solenoid valves.

3. The method for measuring the gas production of continuous feeding biogas production according to claim 2, characterized in that: In step 1, the volume of the air collection bag is selected according to the daily feed amount, and the volume of the air collection bag is the daily feed amount divided by 4.

4. The gas production metering device and the method for using the biogas produced by continuous feeding according to claim 2 are characterized in that: During the discharge process of step 4, the flow meter counts the gas in the gas storage bag to supplement the discharge volume in the anaerobic digester, and the statistical result minus the volume of the gas collection bag is L.

5. The gas production metering device and the method for using the continuous feeding biogas production according to claim 2 are characterized in that: When the accumulated flow rate of the flow meter in step 5 is L, the feeding is stopped.

6. The gas production metering device and the method for using the continuous feeding biogas production according to claim 2 are characterized by: The values ​​of pressure and slight negative pressure are both 2KPa.

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