Biogas water seal and gas-water separation integrated equipment

Abstract

The utility model relates to biogas water seal and gas-water separation integrated equipment which comprises a gas-water separation area and a water seal area which are arranged in the same cylinder, and the water seal area is arranged below the gas-water separation area; a communicating pipe is arranged in the barrel body, one end of the communicating pipe is communicated with the gas-water separation area, and the other end of the communicating pipe extends to the position below the water seal liquid level in the water seal area and is close to a bottom plate of the water seal area; a communicating pipeline is further arranged on the side wall, located above the water seal liquid level, of the water seal area, and the end, away from the water seal area, of the communicating pipeline extends into the gas-water separation area. The methane water seal and gas-water separation integrated device has the advantages that the methane water seal and gas-water separation are integrated on the integrated device, the integrated design of the water seal and gas-water separation functions is achieved, the occupied area is reduced, layout and installation of devices such as pipelines between a water seal area and a gas-water separation area are simplified, and the cost is reduced. The integrated design reduces the risk of methane leakage.

Description

TECHNICAL FIELD

[0001] The utility model relates to the biogas treatment technical field especially relates to a biogas water seal and gas -water separation integrated equipment. BACKGROUND

[0002] Anaerobic fermentation process is common in the treatment of high concentration organic wastewater, kitchen garbage, livestock and poultry manure, municipal sludge and other scenes, which can produce clean energy - biogas while removing a large amount of organic pollutants, so it has multiple advantages of energy, environmental protection, low carbon and so on, and has a wide application at home and abroad. The main component of the biogas produced by anaerobic fermentation process is methane gas, which accounts for about 50% to 60% of the volume of biogas. After treatment, it can be used as bio-natural gas for power generation, vehicle fuel gas, domestic fuel gas and other new energy sources. It has a huge contribution to carbon emission reduction while replacing primary energy. Among them, the safe use of biogas covers multiple technical links. Clause 7.4.9 of the Technical Code for Biogas Engineering Part 1: Engineering Design (NY / T1220.1-2019) clearly requires that after the biogas escapes from the anaerobic reactor, it must first pass through the water seal device to ensure that it is properly treated before purification. In addition, since the biogas contains H2S gas, on the one hand, H2S gas is a toxic gas; on the other hand, when the biogas contains water, it is easy to cause serious corrosion to the subsequent facilities such as pipelines, biogas torches and biogas generators. Therefore, the biogas must be treated by gas-water separation after passing through the water seal tank. It can be seen that the water seal and gas-water separation process play a crucial role in the biogas utilization process. They not only act as a barrier to isolation and fire prevention, but also play a decisive role in the stable operation of the reactor and biogas utilization equipment.

[0003] During the operation of the biogas engineering, the water seal tank and the gas-water separator are two common treatment devices in the biogas engineering, but they have the following shortcomings:

[0004] 1. The water level of the water seal tank must be checked every day, and manual water replenishment or discharge of excess water in the water seal tank due to gas-water separation is required to maintain the stability of the liquid level in the water seal tank. When the liquid level is unstable, it will affect the normal operation of the anaerobic fermentation tank, and in severe cases, it will endanger the safe operation.

[0005] 2. Between the biogas outlet of the anaerobic tank and the biogas terminal utilization facilities, necessary devices such as water seal tank, gas-water separator and desulfurization tank are required. Due to the large number of equipment, long process and difficult management, and involving a large number of pipeline installation, interface and valve, the longer the operation time, the greater the risk of biogas leakage. A simple structure, stable operation and high automation integrated solution is needed. There are few devices that integrate water seal and gas-water separation functions at present.

[0006] 3. Conventional gas-water separators are equipped with a drain valve at the bottom. However, biogas often contains suspended impurities. When these impurities enter the gas-water separator along with the biogas, they can easily clog the drain valve, leading to poor operation and high maintenance costs. Utility Model Content

[0007] The technical problem to be solved by this utility model is to provide an integrated biogas water seal and gas-water separation device, which realizes the integrated design of water seal and gas-water separation functions, can automatically maintain a constant water seal liquid level, automatically discharge the water separated by gas and water, and has positive and negative pressure protection functions.

[0008] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: a biogas water seal and gas-water separation integrated device, comprising: a gas-water separation zone and a water seal zone disposed in the same cylinder, wherein the water seal zone is disposed below the gas-water separation zone;

[0009] The cylinder is provided with a connecting pipe. One end of the connecting pipe is connected to the gas-liquid separation zone, and the other end of the connecting pipe extends to below the water seal liquid level in the water seal zone and is located close to the bottom plate of the water seal zone.

[0010] A connecting pipe is also provided on the side wall of the water seal zone located above the water seal liquid level, and the end of the connecting pipe opposite to the water seal zone extends into the interior of the gas-liquid separation zone.

[0011] The beneficial effects of this utility model are as follows: By integrating biogas water sealing and gas-water separation into one integrated device, the integrated design of water sealing and gas-water separation functions is realized, reducing the floor space occupied and simplifying the layout and installation of pipelines and other equipment between the water sealing zone and the gas-water separation zone. The integrated design reduces the risk of biogas leakage. At the same time, the gas-water separation zone is set above the water sealing zone, so that the separated water produced after gas-water separation can be automatically discharged into the water sealing zone, and the biogas after water sealing can also be introduced into the gas-water separation zone through the connecting pipeline. Moreover, this device has a simple structure, does not contain electrical equipment, can reduce the floor space occupied, reduce pipeline installation, and has extremely low operation and management difficulty.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the gas-water separation zone and the water seal zone are separated by a partition;

[0014] The connecting pipe is located at the center of the partition, and the end of the connecting pipe is spaced apart from the bottom plate of the water seal zone. The connecting pipe is used to pass the separated water generated after gas-water separation into the water seal zone.

[0015] The beneficial effect of the further scheme is that the cylinder is divided into a gas-water separation zone and a water seal zone by the partition, so that the function of the device is more clear, and the separated water generated after the biogas is separated can flow into the water seal zone through the connecting pipe automatically, without manual operation.

[0016] Further, a biogas inlet pipe is provided through the side wall of the side of the water seal zone close to the gas-water separation zone, and the biogas inlet pipe extends into the water seal zone below the water seal liquid level on one side in the water seal zone.

[0017] The beneficial effect of the further scheme is that the biogas inlet pipe serves as the biogas inlet of the device, and the biogas escapes from the water after entering below the water seal liquid level, thereby realizing the water seal effect.

[0018] Further, the end of the biogas inlet pipe is higher than the end of the connecting pipe, and the distance between the end of the biogas inlet pipe and the end of the connecting pipe is 5-10 cm.

[0019] The beneficial effect of the further scheme is to prevent the biogas from directly entering the gas-water separation zone from the connecting pipe.

[0020] Further, a liquid level meter is installed on the water seal zone, and the liquid level meter is used to indicate the water level of the water seal zone.

[0021] A water pipe and a valve installed on the water pipe are arranged at the bottom of the water seal zone, and the water pipe is used to introduce or discharge water into the water seal zone.

[0022] The beneficial effect of the further scheme is that the liquid level meter indicates the water level in the water seal zone, the water pipe serves as the water inlet and discharge port of the water seal zone, and is used to fill the water seal water into the water seal zone during the initial operation of the device, or to discharge the water in the water seal zone completely.

[0023] Further, an overflow port is arranged on the side wall of the water seal zone, a U-shaped pipe is installed at the end of the overflow port away from the water seal zone, the end of the U-shaped pipe away from the overflow port is in communication with the atmosphere, and the overflow port and the U-shaped pipe are used to discharge the excess water in the water seal zone to keep the liquid level in the water seal zone constant, thereby realizing the positive and negative pressure protection.

[0024] The beneficial effect of the further scheme is that when the water separated from the gas-water separation zone is discharged into the water seal zone through the connecting pipe, the excess water is discharged into the U-shaped pipe through the overflow port, and then flows out from the water discharge port of the U-shaped pipe, thereby automatically maintaining the water level in the water seal zone constant.

[0025] Further, the setting height of the overflow port is flush with the height of the water seal liquid level line in the water seal zone.

[0026] The end of the U-shaped pipe away from the overflow port is defined as a drainage port, and the drainage port is at the same height as the overflow port.

[0027] The beneficial effect of the further scheme is to ensure that the two straight pipe sections of the U-shaped pipe have the same height.

[0028] Further, the top of the gas-water separation zone is provided with a biogas outlet for discharging the biogas after water sealing and gas-water separation.

[0029] The U-shaped pipe comprises two straight pipe sections, and the height of the straight pipe section is:

[0030] h = a x P x 10

[0031] In the formula, h is the height of the straight pipe section; a is a multiple, and the value range is 1.5-2; P is the absolute pressure of the biogas outlet.

[0032] The beneficial effect of the further scheme is to discharge the biogas after water sealing and gas-water separation through the biogas outlet; the U-shaped pipe also forms a water sealing effect on the biogas, avoiding leakage of the biogas from the U-shaped pipe, and improving the safety and reliability of the equipment.

[0033] Further, the end of the communication pipeline extending into the gas-water separation zone is provided with a duckbill-shaped gas outlet, the top of the gas-water separation zone is provided with a flow guide cylinder corresponding to the biogas outlet, the flow guide cylinder is arranged in the middle of the gas-water separation zone in the vertical direction, the flow guide cylinder is in communication with the biogas outlet, and the end of the flow guide cylinder away from the biogas outlet is arranged in an open manner.

[0034] The duckbill-shaped gas outlet is arranged off-axis about the central axis of the flow guide cylinder, and the flow guide cylinder is used to drive the biogas sprayed by the duckbill-shaped gas outlet to move spirally downward along the outer wall of the flow guide cylinder to achieve gas-water separation.

[0035] The beneficial effect of the further scheme is that the duckbill-shaped gas outlet is more conducive to the spraying of biogas, and the duckbill-shaped gas outlet is arranged off-axis about the central axis of the flow guide cylinder, which, in cooperation with the flow guide cylinder, makes the sprayed biogas more easily form a spiral downward movement along the outer wall of the flow guide cylinder, so that the movement path of the biogas is longer, and under the dual action of centrifugal force and gravity, the water vapor in the biogas has enough time to form water droplets, thereby effectively separating from the biogas, and improving the efficiency of gas-water separation. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a front view of an embodiment of the utility model;

[0037] Figure 2An internal structure schematic diagram of one embodiment of the utility model;

[0038] Figure 3 An equipment operation example diagram of one embodiment of the utility model.

[0039] In the drawings, the component list represented by each sign is as follows:

[0040] 1, gas-water separation zone; 2, water seal zone; 1-1, biogas outlet; 1-2, flow guide cylinder; 1-3, communication pipeline; 1-4, duckbill type gas outlet; 1-5, partition; 2-1, biogas inlet pipe; 2-2, communication pipe; 2-3, liquid level meter; 2-4, water pipe; 2-5, valve; 2-6, overflow; 3-1, U-shaped pipe; 3-2, drain. DETAILED DESCRIPTION

[0041] The principles and characteristics of the utility model are described below in combination with the drawings, and the examples are only used to explain the utility model and not used to limit the scope of the utility model.

[0042] As Figures 1-2 shown, the utility model discloses a kind of biogas water seal and gas-water separation integrated equipment, specifically comprising: gas-water separation zone 1 and water seal zone 2 are arranged in the same cylinder, wherein equipment whole is cylindrical structure, is divided into upper and lower two-part cylinder, upper part cylinder is gas-water separation zone 1, lower part cylinder is water seal zone 2, i.e. water seal zone 2 is arranged below gas-water separation zone 1.In this embodiment, the material of cylinder can use but not limited to stainless steel or glass steel, not limited here.

[0043] As Figure 2 shown, communication pipe 2-2 that gas-water separation zone 1 and water seal zone 2 are communicated is also arranged in the cylinder, one end of communication pipe 2-2 in water seal zone 2 is extended to below water seal liquid level in water seal zone 2, and is arranged close to the bottom plate of water seal zone 2, so that the separated water after gas-water separation of biogas is flowed into water seal zone 2 by communication pipe 2-2, realizes the automatic drainage of separated water after gas-water separation.Simultaneously, communication pipeline 1-3 that water seal zone 2 and gas-water separation zone 1 are communicated is also arranged on the lateral wall of cylinder, one end of communication pipeline 1-3 is connected to the lateral wall above water seal liquid level in water seal zone 2, the other end of communication pipeline 1-3 is extended to the inside of gas-water separation zone 1 by penetrating the lateral wall of gas-water separation zone 1, and the upper portion of water seal zone 2 is connected with gas-water separation zone by communication pipeline 1-3, so that biogas after water seal can be easily communicated into gas-water separation zone 1 by communication pipeline 1-3.

[0044] In the embodiment, the water seal and the gas-water separation are integrated on one integrated device, the integration design of the water seal and the gas-water separation function is realized, the floor area is reduced, and the layout and installation of the pipeline and other equipment between the water seal area 2 and the gas-water separation area 1 are simplified, the integrated design reduces the risk of biogas leakage; meanwhile, the gas-water separation area 1 is arranged above the water seal area 2, so that the separated water generated after the gas-water separation can be automatically discharged to the water seal area 2, and the biogas after the water seal can also be introduced into the gas-water separation area 1 through the communication pipeline 1-3; and the device has a simple structure and does not contain electrical equipment, can reduce the floor area and the pipeline installation, and has extremely low operation and management difficulty.

[0045] In some feasible embodiments, as shown in Figure 1 A partition plate 1-5 is arranged between the gas-water separation area 1 and the water seal area 2, so that the cylinder is divided into the gas-water separation area 1 and the water seal area 2, the partition plate 1-5 is arranged in the horizontal direction, the communication pipe 2-2 is vertically arranged at the center of the partition plate 1-5, the communication pipe 2-2 is open at the mounting position of the partition plate 1-5, the communication of the communication pipe 2-2 and the gas-water separation area 1 is realized, the other end of the communication pipe 2-2 extends to the bottom end of the cylinder of the water seal area 2, the separated water generated after the gas-water separation of the biogas can flow into the water seal area 2 through the communication pipe 2-2, and the automatic drainage of the water after the gas-water separation is realized. In the embodiment, the distance between the end of the communication pipe 2-2 and the bottom plate of the water seal area 2 is 5 mm, and in actual application, the distance between the end of the communication pipe 2-2 and the bottom plate of the water seal area 2 can be set as needed, so that the end of the communication pipe 2-2 is arranged close to the bottom plate of the water seal area 2, and the overall height of the device can be reduced. Wherein, the end of the communication pipe 2-2 away from the partition plate 1-5 is defined as the end of the communication pipe 2-2.

[0046] In the above scheme, the cylinder is divided into the gas-water separation area 1 and the water seal area 2 by the partition plate 1-5, so that the division of the device function is more clear, and the setting of the communication pipe 2-2 enables the separated water generated after the gas-water separation of the biogas to automatically flow into the water seal area 2 through the communication pipe 2-2, without manual operation.

[0047] As shown in Figure 1 A biogas inlet pipe 2-1 is arranged through the side wall of the water seal area 2 close to the gas-water separation area 1, the biogas inlet pipe 2-1 is arranged at the upper position of the water seal area 2, the biogas inlet pipe 2-1 is connected to the gas outlet of the anaerobic reactor through a pipeline, that is, the biogas inlet pipe 2-1 is used as the biogas inlet of the device, and the side of the biogas inlet pipe 2-1 in the water seal area 2 extends below the water seal liquid level of the water seal area 2, so that the biogas enters below the water seal liquid level through the biogas inlet pipe 2-1 and escapes from the water, thereby realizing the water seal effect. It can be conceived that the setting position of the biogas inlet pipe 2-1 on the side wall of the water seal area 2 should be higher than the water seal liquid level position of the water seal area 2.

[0048] like Figure 1 As shown, in the preferred embodiment, the end of the biogas inlet pipe 2-1 is 5-10 cm higher than the end of the connecting pipe 2-2, thereby preventing biogas from directly entering the gas-water separation zone 1 from the connecting pipe 2-2. The end of the biogas inlet pipe 2-1 that is away from the anaerobic reactor is defined as the end of the biogas inlet pipe 2-1.

[0049] like Figure 1 As shown, in the preferred embodiment, a level gauge 2-3 is also provided on the water seal zone 2. The level gauge 2-3 can be a mechanical level gauge. In this embodiment, the level gauge 2-3 is a glass tube level gauge. The level gauge 2-3 is installed on the outer wall in the middle of the water seal zone 2, and both ends of the level gauge 2-3 extend into the water seal zone 2. The level gauge 2-3 indicates the water level in the water seal zone 2. The middle scale of the level gauge 2-3 is aligned with the water seal level line, which is the highest point of the water seal zone 2. At the same time, a water pipe 2-4 and a valve 2-5 are provided at the bottom of the water seal zone 2. The valve 2-5 is installed on the water pipe 2-4. The water pipe 2-4 serves as the inlet and outlet of the water seal zone 2. It is used to fill the water seal zone 2 with water during the initial operation of the equipment, or to drain the water in the water seal zone 2. During normal operation, the valve 2-5 is in a normally closed state, so that the water level in the water seal zone 2 remains constant.

[0050] like Figure 1 As shown, in the preferred embodiment, an overflow port 2-6 is also provided on the side wall of the water seal zone 2. The overflow port 2-6 is located approximately in the middle of the water seal zone 2. Specifically, the height of the overflow port 2-6 should be flush with the height of the water seal liquid level line in the water seal zone 2. A U-shaped pipe 3-1 is installed at the end of the overflow port 2-6 away from the water seal zone 2. The U-shaped pipe 3-1 is a positive U-shaped pipe, that is, the opening of the U-shaped pipe 3-1 faces upward. The end of the U-shaped pipe 3-1 away from the overflow port 2-6 is connected to the atmosphere and is defined as the drain port 3-2. Excess water in the water seal zone 2 is discharged through the overflow port 2-6 and the U-shaped pipe 3-1, ensuring a constant water seal liquid level and preventing the liquid level in the water seal zone 2 from being too high or too low, which would affect the water seal effect. When the water separated in the gas-water separation zone 1 flows into the water seal zone 2 through the connecting pipe 2-2, excess water flows into the U-shaped pipe 3-1 through the overflow port 2-6, and then flows out by gravity from the drain port 3-2 of the U-shaped pipe 3-1, thus automatically maintaining a constant water level in the water seal zone 2. Compared to the inverted U-shaped drain pipe 2-4 in existing equipment, this design prevents siphoning that could cause the water seal level to drop. During operation, the U-shaped pipe 3-1 must be kept unobstructed, and the drain port 3-2 must be open to the atmosphere and not blocked.

[0051] In this embodiment, the U-shaped pipe 3-1 can be a pipe made of rigid materials such as steel pipe or PVC pipe, or a pipe made of flexible materials such as snakeskin pipe or rubber pipe, and the pipe is bent into a U-shape.

[0052] In this embodiment, the drain outlet 3-2 and the overflow outlet 2-6 are located at the same height, ensuring that the two straight pipe sections of the U-shaped pipe 3-1 are at the same height.

[0053] like Figure 1 As shown, in this embodiment, a biogas outlet 1-1 is provided at the top of the gas-water separation zone 1. After the biogas passes through the water seal and gas-water separation, it is discharged from the biogas outlet 1-1. That is, the outlet is the final outlet of biogas for this device.

[0054] In this embodiment, the U-shaped pipe 3-1 comprises two straight pipe sections. The water column pressure corresponding to the height h of the straight pipe section of the U-shaped pipe 3-1 should be 1.5-2 times the absolute pressure P of the biogas outlet. Simultaneously, the height of the U-shaped pipe 3-1 must be higher than the distance between the water seal liquid level line and the lower edge of the biogas inlet pipe 2-1. The pressure inside the U-shaped pipe 3-1 is relatively greater. Therefore, biogas can only break through the liquid level in the water seal zone 2 and enter the gas-liquid separation zone 1 through the connecting pipe 1-3. This allows the U-shaped pipe 3-1 to also form a water seal for the biogas, preventing biogas leakage from the U-shaped pipe 3-1 and improving the safety and reliability of the equipment. The conversion relationship is as follows:

[0055] h = a × P × 10

[0056] In the formula, h is the height of the straight pipe section, in cm; a is a multiple, ranging from 1.5 to 2; P is the absolute pressure of the biogas outlet 1-1, in kPa. The absolute pressure of the biogas outlet 1-1 is the net pressure of the biogas outlet 1-1. Excluding the influence of atmospheric pressure, this value is consistent with the pressure within the gas-water separation zone 1. The net pressure here is expressed in terms of water column height; 1 kPa of gas pressure corresponds to 10 cm of water column height.

[0057] In this embodiment, setting the water column pressure corresponding to the height h of the straight pipe section of U-shaped pipe 3-1 to 1.5-2 times the absolute pressure P of biogas outlet 1-1 can achieve positive and negative pressure protection functions.

[0058] a. During normal operation, the U-shaped pipe 3-1 is filled with water, and there is a liquid level difference between the two straight sections of the U-shaped pipe 3-1. The pressure of the water column formed is greater than the biogas pressure in the gas-water separation zone 1. At this time, the separated biogas can only be discharged from the biogas outlet 1-1, while the water is discharged from the U-shaped pipe 3-1.

[0059] b. When the positive pressure exceeds the pressure, that is, when the pressure in the gas-water separation zone 1 is greater than the water column pressure formed by the liquid level difference between the two straight pipe sections of the U-shaped pipe 3-1, the water in the U-shaped pipe 3-1 will be discharged under the action of biogas pressure to relieve pressure. After that, the entire set of equipment is connected to the external atmosphere, realizing positive pressure protection.

[0060] c. When the negative pressure exceeds the pressure, that is, when the negative pressure in the gas-water separation zone 1 is lower than the water column pressure formed by the liquid level difference h between the two straight pipe sections of the U-shaped pipe 3-1, for example, when the biogas inlet generates negative pressure, the water in the U-shaped pipe 3-1 will be drawn into the water seal zone 2 under the action of negative pressure. When all the water in the U-shaped pipe 3-1 is drawn into the water seal zone 2, the entire equipment is connected to the external atmosphere. Under the action of negative pressure, external air will enter the equipment, achieving communication with the air, until the negative pressure disappears, thus achieving negative pressure protection.

[0061] like Figure 2 As shown, in the preferred embodiment, a duckbill-shaped gas outlet 1-4 is provided at one end of the connecting pipe 1-3 that extends into the gas-water separation zone 1. A guide tube 1-2 is provided at the top of the gas-water separation zone 1 corresponding to the biogas outlet 1-1. The guide tube 1-2 is vertically positioned in the middle of the gas-water separation zone 1. The guide tube 1-2 is a tubular structure. The upper end of the guide tube 1-2 is connected to the biogas outlet 1-1. The end of the guide tube 1-2 facing away from the biogas outlet 1-1 is open, so that the biogas after gas-water separation can enter the interior of the guide tube 1-2 through the open opening and then be discharged from the system through the biogas outlet 1-1. The duckbill-shaped gas outlet 1-4 is offset from the central axis of the guide tube 1-2. The biogas after water sealing is ejected through the duckbill-shaped gas outlet 1-4. The ejected biogas moves in a spiral shape along the outer wall of the guide tube 1-2 to the bottom of the guide tube 1-2. Under the action of centrifugal force and gravity, gas and water are separated. The separated water flows along the inner wall to the baffle 1-5 and flows into the water seal area 2 through the connecting pipe 2-2. The separated biogas enters the interior of the guide tube 1-2 and is finally discharged from the system through the biogas outlet 1-1, thus realizing gas and water separation.

[0062] In the above scheme, the duckbill-shaped gas outlet 1-4 is more conducive to the ejection of biogas. The duckbill-shaped gas outlet 1-4 is set off-axis about the central axis of the guide tube 1-2. In conjunction with the guide tube 1-2, the ejected biogas is more likely to form a spiral downward movement along the outer wall of the guide tube 1-2, making the movement path of the biogas longer. Under the dual action of centrifugal force and gravity, the water vapor in the biogas has enough time to form water droplets, thereby effectively separating it from the biogas and improving the efficiency of gas-water separation.

[0063] The specific work process is as follows:

[0064] S1: Water is introduced into the water seal zone 2 until the water in the water seal zone 2 enters the U-shaped pipe 3-1 from the overflow port 2-6 and fills the U-shaped pipe 3-1; Specifically, in step S1, the tap water pipe is connected to the pipe through a flexible hose, the valve 2-5 is opened, and water is introduced into the cylinder of the water seal zone 2. During this process, the water level is observed through the level gauge 2-3 until the water enters the U-shaped pipe 3-1 from the overflow port 2-6 and fills the U-shaped pipe 3-1, then the valve 2-5 is closed.

[0065] S2: the biogas discharged by the anaerobic generator is introduced into the water seal liquid surface below of the water seal area 2, and the biogas escaping after water sealing enters the upper cavity above the water seal liquid surface of the water seal area 2, and the water sealing is completed; in step S2, the biogas pipeline of the anaerobic reactor can be directly communicated with the biogas inlet pipeline 2-1, and then the biogas is introduced into the water seal area 2, and the entering biogas must escape to the upper cavity of the water seal area 2 after passing through the water sealing section, so that the function of water sealing is realized.

[0066] S3: since the upper cavity of the water seal area 2 is connected with the gas-water separation area 1 through the communication pipeline 1-3, the biogas after water sealing can easily enter the gas-water separation area 1 through the communication pipeline 1-3, and the end of the communication pipeline 1-3 is the duckbill-shaped gas outlet 1-4, since the duckbill-shaped gas outlet 1-4 is installed in an eccentric shaft with the flow guide cylinder 1-2, the biogas is sprayed towards the flow guide cylinder 1-2 through the duckbill-shaped gas outlet 1-4 at the end of the communication pipeline 1-3, the flow guide cylinder 1-2 makes the biogas move spirally along the outer wall of the flow guide cylinder 1-2 to the bottom of the flow guide cylinder 1-2, and the gas-water separation is realized under the action of centrifugal force and gravity.

[0067] S4: the water after gas-water separation flows along the inner wall of the gas-water separation area 1 to the partition plate 1-5, and then flows into the water seal area 2 through the communication pipe 2-2, when the water level in the water seal area 2 reaches the water seal liquid level line, since the water generated in the gas-water separation area 1 continuously enters the water seal area 2 through the communication pipe 2-2, the excess water flows into the U-shaped pipe 3-1 through the overflow port 2-6, according to the syphon principle of the U-shaped pipe 3-1, the excess water overflows out through the final water outlet 3-2 of the U-shaped pipe 3-1, and the stability of the water level in the water seal area 2 is maintained; the biogas after gas-water separation enters the inside of the flow guide cylinder 1-2 and is discharged through the biogas outlet 1-1.

[0068] In this process, since the gas-water separation area 1 and the water seal area 2 are connected through the communication pipeline 1-3, the air pressures in the gas-water separation area 1 and the water seal area 2 are the same, so after gas-water separation, only water enters the water seal area 2 through the communication pipe 2-2, and the biogas will not return to the gas-water separation area 1 through the communication pipe 2-2.

[0069] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary, and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. An integrated biogas water seal and gas-water separation device, characterized in that, include: A gas-water separation zone (1) and a water seal zone (2) are set in the same cylinder, with the water seal zone (2) located below the gas-water separation zone (1); The cylinder is provided with a connecting pipe (2-2), one end of which is connected to the gas-water separation zone (1), and the other end of which extends to below the water seal liquid level in the water seal zone (2) and is located close to the bottom plate of the water seal zone (2). A connecting pipe (1-3) is also provided on the side wall of the water seal area (2) located above the water seal liquid level. The end of the connecting pipe (1-3) away from the water seal area (2) extends into the interior of the gas-water separation area (1).

2. The integrated biogas water seal and gas-water separation device according to claim 1, characterized in that, The gas-water separation zone (1) and the water seal zone (2) are separated by a partition (1-5); The connecting pipe (2-2) is provided at the center of the partition (1-5). The end of the connecting pipe (2-2) is spaced apart from the bottom plate of the water seal zone (2). The connecting pipe (2-2) is used to pass the separated water generated after gas-water separation into the water seal zone (2).

3. The integrated biogas water seal and gas-water separation device according to claim 1, characterized in that, A biogas inlet pipe (2-1) is provided through the side wall of the water seal zone (2) near the gas-water separation zone (1). The biogas inlet pipe (2-1) extends into the water seal zone (2) below the water seal liquid level on one side within the water seal zone (2).

4. The integrated biogas water seal and gas-water separation device according to claim 3, characterized in that, The end of the biogas inlet pipe (2-1) is positioned higher than the end of the connecting pipe (2-2), and the distance between the end of the biogas inlet pipe (2-1) and the end of the connecting pipe (2-2) is 5-10cm.

5. The integrated biogas water seal and gas-water separation device according to any one of claims 1-4, characterized in that, A level gauge (2-3) is also installed on the water seal area (2), and the level gauge (2-3) is used to indicate the water level in the water seal area (2); The bottom of the water seal area (2) is provided with a water pipe (2-4) and a valve (2-5) installed on the water pipe (2-4). The water pipe (2-4) is used to introduce or discharge water into the water seal area (2).

6. The integrated biogas water seal and gas-water separation device according to claim 5, characterized in that, An overflow port (2-6) is also provided on the side wall of the water seal area (2). A U-shaped pipe (3-1) is installed at the end of the overflow port (2-6) away from the water seal area (2). The end of the U-shaped pipe (3-1) away from the overflow port (2-6) is connected to the atmosphere. The overflow port (2-6) and the U-shaped pipe (3-1) are used to drain excess water in the water seal area (2) to maintain a constant liquid level in the water seal area (2) and achieve positive and negative pressure protection.

7. The integrated biogas water seal and gas-water separation device according to claim 6, characterized in that, The overflow port (2-6) is set at the same height as the water seal liquid level line in the water seal area (2); The end of the U-shaped pipe (3-1) facing away from the overflow port (2-6) is defined as the drain port (3-2), and the drain port (3-2) and the overflow port (2-6) are located at the same height.

8. The integrated biogas water seal and gas-water separation device according to claim 6 or 7, characterized in that, The top of the gas-water separation zone (1) is provided with a biogas outlet (1-1) for discharging biogas after water sealing and gas-water separation; The U-shaped pipe (3-1) comprises two straight pipe sections, the height of which is: h = a × P × 10 In the formula, h is the height of the straight pipe section; a is a multiple, ranging from 1.5 to 2; and P is the absolute pressure of the biogas outlet (1-1).

9. The integrated biogas water seal and gas-water separation device according to claim 8, characterized in that, The connecting pipe (1-3) extends into the gas-water separation zone (1) and is provided with a duckbill-shaped gas outlet (1-4). A guide tube (1-2) is provided at the top of the gas-water separation zone (1) corresponding to the biogas outlet (1-1). The guide tube (1-2) is arranged vertically in the middle of the gas-water separation zone (1). The guide tube (1-2) is connected to the biogas outlet (1-1). The end of the guide tube (1-2) facing away from the biogas outlet (1-1) is open. The duckbill-shaped gas outlet (1-4) is offset from the central axis of the guide tube (1-2). The guide tube (1-2) is used to drive the biogas ejected from the duckbill-shaped gas outlet (1-4) to move spirally downward along the outer wall of the guide tube (1-2) to achieve gas-water separation.

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