CN219324054U

CN219324054U - Multifunctional biogas purifying device

Info

Publication number: CN219324054U
Application number: CN202223222436.4U
Authority: CN
Inventors: 邹刚; 张晓军; 彭雨薇
Original assignee: Hubei Zhongjin Technology Co ltd
Current assignee: Hubei Zhongjin Technology Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-07-11
Anticipated expiration: 2032-12-01

Abstract

The application discloses multi-functional marsh gas purifier relates to the water treatment field, includes: the tank body is internally provided with alkali liquor, the top of the tank body is provided with an air outlet, the alkali liquor is used as a reactant for desulfurizing and decarbonizing methane, and the air outlet at the top of the tank body is a purified methane outlet; one end of the biogas inlet pipe is connected with the anaerobic reactor, the other end of the biogas inlet pipe enters the tank body from the middle upper part of the tank body, and an anti-siphon distance is reserved between the inlet and the alkali liquor; the gas distribution device is arranged at the bottom of the tank body, is positioned in the alkali liquor and is communicated with the end part of the methane inlet pipe; the supporting grid is arranged in the tank body and is higher than the liquid level of the alkali liquor, and the upper surface of the supporting grid is paved with a dehydration filler. The multifunctional biogas purifying device has the advantages of simple structure, high safety, less equipment investment, biogas purification realization and convenient operation.

Description

Multifunctional biogas purifying device

Technical Field

The application relates to the technical field of water treatment, in particular to a multifunctional biogas purifying device.

Background

At present, high-concentration organic wastewater generally adopts an anaerobic biological treatment technology, organic matters are fermented in an anaerobic reactor respectively by hydrolytic bacteria, acidogenic bacteria, methanogenic bacteria and other anaerobic microorganisms to generate methane, the main component of the methane is methane (about 50% -70%), and the balance is carbon dioxide, water vapor, a small amount of nitrogen, hydrogen sulfide and other gases. As the methane is a flammable gas with higher heat value, the methane can be used as fuel of a heat supply boiler or as raw material of a methane generator. However, in order to prevent the combustion and explosion of the biogas leakage in the collecting and conveying process, a water-sealed tank is required to be arranged to effectively isolate the biogas conveyed outwards from the anaerobic reactor, and the water in the water-sealed tank can also intercept and purify impurities carried in the biogas; meanwhile, the marsh gas from the water sealed tank often contains more water vapor, which affects the combustion and recycling of the marsh gas and requires the removal of water in the marsh gas by a gas-water separation device; in addition, the biogas generated by the anaerobic reactor contains gases such as hydrogen sulfide, the hydrogen sulfide has stronger corrosiveness to metals and is harmful to human health, sulfur dioxide which is a combustion product is a main air pollution factor, so that desulfurization treatment is required before the biogas is combusted or power generation, and dry desulfurization is usually adopted for biogas desulfurization, and a desulfurizing agent is a mixture of scrap iron and saw dust.

However, because the water sealed tank, the gas-water separation device and the desulfurization device are independent, pipeline valves are needed to be used for connection, the system is complex in composition, the connection points are more, the pipeline valves are more, biogas leakage is easy to occur, and potential safety hazards exist; and the equipment investment is higher, and the operation and maintenance workload is large.

Disclosure of Invention

Aiming at the defects in the prior art, the purpose of the application is to provide a multifunctional biogas purifying device which has the advantages of simple structure, high safety, less equipment investment and convenient operation.

In order to achieve the above object, a multifunctional biogas purifying device is adopted, comprising:

the tank body is internally provided with alkali liquor, and the top of the tank body is provided with an air outlet;

one end of the biogas inlet pipe is connected with the anaerobic reactor, the other end of the biogas inlet pipe enters the tank body from the middle upper part of the tank body, and an anti-siphon distance is reserved between the inlet and the alkali liquor;

the gas distribution device is arranged at the bottom of the tank body, is positioned in the alkali liquor and is communicated with the end part of the methane inlet pipe;

the supporting grid is arranged in the tank body and is higher than the liquid level of the alkali liquor, and the upper surface of the supporting grid is paved with a dehydration filler.

Preferably, the device further comprises an alkali supplementing pipe for supplementing alkali liquor, the alkali supplementing pipe enters the tank body from the upper part of the tank body and is positioned below the supporting grid, and an alkali supplementing electromagnetic valve is arranged on the alkali supplementing pipe.

Preferably, the alkali liquor is a 20% -40% NaOH solution.

Preferably, an annular flat steel supporting beam is arranged on the periphery of the inner wall of the tank body, and the supporting grid is fixed with the annular flat steel supporting beam.

Preferably, the filler is a polyhedral hollow sphere, and is made of polypropylene, and the diameter of the filler is larger than the mesh diameter of the supporting grid.

Preferably, the biogas distribution device is composed of two layers of horn-shaped structures, the inner layer of horn-shaped structures are fixed on a fixing piece in the outer layer of horn-shaped structures, an airflow channel is reserved between the two layers of horn openings, small holes are uniformly distributed on the inclined surface of the outer layer of horn-shaped structures, and a smaller port of the outer layer of horn-shaped structures is communicated with the end part of the air inlet pipe.

Preferably, the device further comprises a drain pipe for discharging waste liquid, the drain pipe is positioned at the bottom of the tank body and is communicated with the tank body, and a drain valve is arranged on the drain pipe.

Preferably, the device further comprises a liquid level meter for measuring the liquid level of the alkali liquor, the liquid level meter is interlocked with the alkali supplementing electromagnetic valve, when the liquid level of the alkali liquor is lower than a liquid level threshold preset by the liquid level meter, the alarm is given, the sewage discharging valve is closed, and the alkali supplementing electromagnetic valve is opened.

Preferably, the apparatus further comprises: and when the pH value of the alkali liquor is lower than a preset pH threshold value set by the online pH meter, the air inlet valve is closed, the alkali supplementing electromagnetic valve is closed, and the sewage draining valve is opened.

Preferably, the liquid level meter is a magnetic flap liquid level meter, is arranged on the outer side surface of the tank body and is communicated with the inner part of the tank body.

The beneficial effects that technical scheme that this application provided brought include:

the multifunctional marsh gas purifying device has the advantages that the upper part of the multifunctional marsh gas purifying device is provided with the dewatering filler due to the fact that alkali liquid is stored in the multifunctional marsh gas purifying device, and a water seal tank, a desulfurizing device and a gas-water separating device in a traditional marsh gas purifying system are integrated into a whole, so that the purposes of simplifying the structure, reducing pipeline valves and improving safety are achieved, and further equipment investment is reduced, and the operation is convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic structural diagram of a multifunctional biogas purification device provided in an embodiment of the present application;

reference numerals:

1. a tank body; 2. biogas production an air inlet pipe; 3. a gas distribution device; 4. alkali liquor; 5. a support grid; 6. dehydrating and filling; 7. an air outlet; 8. an online PH meter; 9. a blow-down valve; 10. a liquid level gauge; 11. an alkali supplementing electromagnetic valve; 12. an alkali supplementing pipe; 13. an intake valve; 14. and a blow-down pipe.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present application based on the embodiments herein.

The embodiment of the application provides a multifunctional biogas purification device, which can solve the problems that the traditional biogas purification system is complex in composition, multiple in pipeline valves and connection points, and potential safety hazards are caused easily due to biogas leakage; and the equipment investment is low, and the operation and maintenance workload is small.

As shown in fig. 1, the present application discloses an embodiment of a multi-functional biogas purification apparatus. The multifunctional biogas purifying device comprises a tank body 1, a biogas inlet pipe 2, a gas distribution device 3 and a supporting grid 5. The inside of the tank body 1 is provided with alkali liquor 4, and the top of the tank body 1 is provided with an air outlet 7. One end of the biogas inlet pipe 2 is connected with the anaerobic reactor, the other end of the biogas inlet pipe 2 enters the tank body 1 from the middle upper part of the tank body 1, and an anti-siphon distance is reserved between the inlet and the alkali liquor 4. The anti-siphon distance can prevent alkali liquor 4 from entering the methane inlet pipe 2 from the tank body 1.

The biogas inlet pipe 2 is communicated with the gas distribution device 3 after entering the tank body 1, and the gas distribution device 3 is arranged at the bottom of the tank body 1 and is positioned in the alkali liquor 4. The upper part of the tank body 1 is also provided with a supporting grid 5, the supporting grid 5 is higher than the liquid level of the alkali liquor 4, and a dewatering filler 6 is paved on the upper surface of the supporting grid 5. Preferably, the dehydration filler 6 is a polyhedral hollow sphere and is made of polypropylene.

Furthermore, the gas distribution device 3 is formed by two layers of horn-shaped structures, an airflow channel is reserved between the two layers of horn openings, small holes are uniformly distributed on the inclined surface of the outer layer of horn-shaped structure, and methane can be uniformly distributed in the alkali liquor 4 through the gas distribution device 3.

In some embodiments, the tank 1 is a closed steel tank, and is composed of a section of cylinder and a lower oval seal head, and since the density of the biogas is smaller than that of air, the biogas can enter the storage device from the gas outlet 7 at the top of the tank 1 without pressurization after the biogas is purified.

The biogas inlet pipe 2 enters the tank body 1 from the middle upper part of the tank body 1, and the inlet is arranged on the side wall of the tank body 300mm above the liquid level of the alkali liquor 4, so that the alkali liquor 4 can be prevented from entering the biogas inlet pipe 2 from the tank body 1. The methane inlet pipe 2 enters the tank body 1 and then is communicated with the methane distribution device 3, the methane distribution device 3 is arranged at the bottom of the tank body 1 and is positioned in the alkali liquor 4, round steel reinforcing bars are equidistantly arranged on the inclined surface of the outer side of the inner layer horn of the methane distribution device 3 along the circumferential direction and are welded with the inner side surface of the outer layer horn, the diameter of small holes distributed by the outer layer horn-shaped structure is 3mm, the smaller ports of the outer layer horn-shaped structure are communicated with the end part of the methane inlet pipe 2, methane can be uniformly distributed in the alkali liquor 4 through the methane distribution device 3, and the reaction efficiency is improved. Preferably, the alkali liquor 4 is a 20% -40% NaOH solution, the NaOH solution can be used for desulfurizing methane and removing carbon dioxide in the methane, so that the effect of carbon emission reduction is achieved.

The upper part of the tank body 1 is also provided with a supporting grid 5, the supporting grid 5 is higher than the liquid level of the alkali liquor 4, and a dewatering filler 6 is paved on the upper surface of the supporting grid 5.

An annular flat steel supporting beam is arranged on the periphery of the inner wall of the tank body 1 and is positioned above the biogas inlet pipe 2, a supporting grid 5 is fixed with the annular flat steel supporting beam, a dehydration filler 6 is paved on the supporting grid 5, the desulfurized and decarbonized biogas moves upwards, and when passing through the dehydration filler 6, moisture in the dehydrated biogas is condensed into water drops on the filler, so that dehydration is completed.

The multifunctional biogas purifying device further comprises an alkali supplementing pipe 12 which is positioned between the supporting grid 5 and the biogas inlet pipe 2 and is communicated with the tank body, the alkali supplementing pipe 12 is provided with an alkali supplementing electromagnetic valve 11, and when alkali liquor 4 in the tank body is not alkaline enough, the alkali liquor 4 is added into the tank body 1 through the alkali supplementing pipe 12.

The multifunctional biogas purifying device further comprises a drain pipe 14 which is positioned at the bottom of the tank body 1 and is communicated with the inside of the tank body 1, the drain pipe 14 is provided with a drain valve 9, and when alkali liquor in the tank body 1 fails, waste liquor is discharged through the drain pipe 14.

The multifunctional biogas purifying device further comprises an online PH meter 8 and an air inlet valve 13, wherein the air inlet valve 13 is arranged on the air inlet pipe 2, and the online PH meter 8 is used for measuring the PH value. When the PH value of the alkali liquor 4 is lower than the PH threshold value preset by the online PH meter 8, the air inlet valve 13 is closed, the alkali supplementing electromagnetic valve 11 is closed, and the blow-off valve 9 is opened.

Furthermore, the multifunctional biogas purifying device can further comprise a liquid level meter 10 for measuring the liquid level of the alkali liquid, the liquid level meter 10 is interlocked with the alkali supplementing electromagnetic valve 11, when the liquid level of the alkali liquid 4 is lower than a liquid level threshold value preset by the liquid level meter 10, the liquid level meter 10 alarms, the sewage discharging valve 9 is closed, and the alkali supplementing electromagnetic valve 11 is opened. Preferably, the method comprises the steps of, the level gauge 10 is a magnetic flap level gauge.

According to the multifunctional biogas purification device, the tank body 1 is a reaction container, the alkali liquor 4 is used as a reactant for biogas desulfurization and decarbonization, the dehydration filler 6 on the supporting grid 5 plays a role in dehydration, and the diameter and the installation height of the dehydration filler 6 can be adjusted according to actual requirements. The marsh gas enters from the marsh gas inlet pipe 2, then the marsh gas is uniformly distributed in the alkali liquor through the gas distribution device 3, fully reacts with the alkali liquor 4, the marsh gas after desulfurization and decarbonization moves upwards, when passing through the dehydration filler 6, the moisture therein is condensed into water drops on the filler, dehydration is completed, and then the purified marsh gas enters into the marsh gas storage device from the gas outlet 7 at the upper end.

Further, when the online PH meter 8 measures that the alkali liquor 4 in the tank body 1 fails, the blow-off valve 9 is opened, waste liquor is discharged through the blow-off pipe 14, and the waste liquor can be observed in real time through the liquid level meter 10 in the liquid discharging process, when the liquid level of the alkali liquor 4 is lower than the liquid level threshold value, the liquid level meter 10 alarms, the blow-off valve 9 is closed, the linkage alkali supplementing electromagnetic valve 11 is opened, and the alkali liquor 4 is added through the alkali supplementing pipe 12. The waste liquid can be discharged, the alkali liquid can be timely supplemented, when the alkali liquid is supplemented, the pH value of the alkali liquid can be observed through the online pH meter 8, and after the pH value reaches a specified value, the liquid supplementing is stopped, and the whole process is controllable.

The multifunctional biogas purification device integrates the water sealed tank, the desulfurizing device and the gas-water separation device in the traditional biogas purification system into a whole, thereby realizing the purposes of simplifying the structure, improving the safety, reducing the equipment investment and facilitating the operation.

In the description of the present application, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of description of the present application and simplification of the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present application. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art as the case may be.

It should be noted that in this application, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the application to enable one skilled in the art to understand or practice the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A multi-functional biogas purification apparatus, comprising:

the tank body (1) is internally provided with alkali liquor (4), and the top of the tank body is provided with an air outlet (7);

one end of the biogas inlet pipe (2) is connected with the anaerobic reactor, the other end of the biogas inlet pipe enters the tank body (1) from the middle upper part of the tank body (1), and an anti-siphon distance is reserved between the inlet and the alkali liquor (4);

the gas distribution device (3) is arranged at the bottom of the tank body (1), is positioned in the alkali liquor (4) and is communicated with the end part of the methane inlet pipe (2);

the supporting grid (5) is arranged in the tank body (1) and is higher than the liquid level of the alkali liquor (4), and the upper surface of the supporting grid is paved with a dehydration filler (6).

2. A multi-functional biogas purification apparatus as claimed in claim 1, further comprising an alkali supply pipe (12) for supplying alkali solution, wherein the alkali supply pipe (12) is provided with an alkali supply electromagnetic valve (11) and enters the tank body from the upper part of the tank body (1) and is positioned below the supporting grid (5).

3. A multi-functional biogas purification apparatus as claimed in claim 1, wherein the circumference of the inner wall of the tank (1) is provided with an annular flat steel support beam, and the support grid (5) is fixed with the annular flat steel support beam.

4. A multi-functional biogas purification apparatus as claimed in claim 1, wherein the packing (6) is a polyhedral hollow sphere made of polypropylene with a diameter larger than the mesh diameter of the supporting mesh (5).

5. The multifunctional biogas purification device as claimed in claim 1, wherein the biogas distribution device (3) is composed of two layers of horn-shaped structures, the inner layer of horn-shaped structures are fixed on a fixing piece in the outer layer of horn-shaped structures, an airflow channel is reserved between the two layers of horn openings, small holes are uniformly distributed on the inclined surface of the outer layer of horn-shaped structures, and the smaller port of the outer layer of horn-shaped structures is communicated with the end part of the air inlet pipe (2).

6. A multi-functional biogas purification apparatus as claimed in claim 2, further comprising a drain pipe (14) for discharging waste liquid, which is located at the bottom of the tank (1) and is in communication with the tank (1), and a drain valve (9) is provided on the drain pipe (14).

7. A multi-functional biogas purification apparatus as claimed in claim 6, characterized in that the apparatus further comprises a level gauge (10) for measuring the level of the lye, which is interlocked with a lye supplementing solenoid valve (11), and when the lye level is below a level threshold value preset by the level gauge (10), the alarm is given, the blow-down valve (9) is closed, and the lye supplementing solenoid valve (11) is opened.

8. The multi-functional biogas purification apparatus of claim 6, further comprising: the device comprises an online PH meter (8) for measuring the PH value of alkali liquor (4), an air inlet valve (13), wherein the air inlet valve (13) is arranged on an air inlet pipe (2), when the PH value of the alkali liquor is lower than a preset PH threshold value set by the online PH meter (8), the air inlet valve (13) is closed, an alkali supplementing electromagnetic valve (11) is closed, and a blow-off valve (9) is opened.

9. The multifunctional biogas purification device according to claim 7, wherein the liquid level meter (10) is a magnetic flap liquid level meter, is arranged on the outer side surface of the tank body (1), and is communicated with the interior of the tank body (1).