Biogas biological desulfurization device

Abstract

The utility model provides a biogas biological desulfurization device and belongs to the technical field of biogas treatment. A spraying head, a Pall ring packing layer, an atomizing nozzle and a fiber honeycomb layer are arranged in a treatment tank; the Pall ring packing layer and the spray header are used for primarily neutralizing H2S gas in the biogas; the fiber honeycomb layer is formed by interweaving fluffy fibers; a large amount of alkali liquid drops sprayed by the atomizing nozzles are sprayed onto the fiber honeycomb layer, the alkali liquid forms a plurality of layers of water films on the fiber honeycomb layer under the influence of the surface tension of water, and when the biogas passes through the fiber honeycomb layer, the biogas equivalently passes through the plurality of layers of water films, so that the contact time and the contact opportunity of the alkali liquid and the spray are increased; therefore, the effects of finely treating and purifying sulfides in the biogas are achieved; besides, a gas outlet guide pipe is arranged at the top of a gas outlet in the top of the treatment tank, and the other end of the gas outlet guide pipe is communicated with a negative pressure machine, so that the interior of the treatment tank is in a micro-negative pressure state, the biogas flow rate is increased during use, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of biogas treatment, and particularly relates to a biogas biological desulfurization device. Background Art

[0002] Biogas is a mixed gas, mainly containing CH4, CO2, and also containing a small amount of N2, H2, O2 and H2S. H2S is a highly toxic gas with a colorless and stinking smell of rotten eggs, and has strong corrosiveness to pipelines, instruments, metal equipment, etc. under aerobic and humid and hot conditions; the SO2 generated by burning H2S also causes certain pollution to the environment. Generally, the mass concentration of H2S in biogas is between 1 and 12 g / m 3 . And the environmental protection standard in China stipulates that when using biogas energy, the mass concentration of H2S in biogas shall not exceed 20 mg / m 3 . Therefore, the research on biogas purification and desulfurization process is particularly important.

[0003] And biogas desulfurization is the key and difficult point of biogas engineering. According to different desulfurization principles, biogas desulfurization can be divided into direct desulfurization and indirect desulfurization. Direct desulfurization is to directly separate and remove H2S gas in biogas, while indirect desulfurization is to adopt certain treatment methods to reduce or inhibit the generation of H2S gas. Among them, direct desulfurization includes chemical method and biological method.

[0004] In the existing biogas desulfurization devices, the contact between biogas and the filtering mechanism is not sufficient, resulting in a slow desulfurization speed and extremely low efficiency. Therefore, in view of the above situation, there is an urgent need to develop a biogas biological desulfurization device to overcome the deficiencies in current practical applications. Content of the Utility Model

[0005] The utility model aims at the problems in the prior art and provides a biogas biological desulfurization device.

[0006] In order to achieve the above purpose, the technical solution adopted in this application is as follows:

[0007] A biogas biological desulfurization device includes a base and a treatment tank; the top surface of the base is fixedly connected to the bottom side of the treatment tank through a support column; a biogas inlet is provided on the side of the treatment tank at one-third from the bottom to the top, an air outlet is provided on the top surface of the treatment tank, and a waste liquid outlet is provided on the bottom surface of the treatment tank;

[0008] In the tower body area of the treatment tank, a demister, an atomizing nozzle, a fiber honeycomb layer, a spray head, a Pall ring packing layer and an activated carbon filter layer are sequentially arranged from top to bottom; the air inlet is arranged between the Pall ring packing layer and the activated carbon filter layer;

[0009] The top surface of the base is also fixedly installed with a water tank filled with lye. The water tank is arranged on the left side of the treatment tank. A water pump is fixedly installed on the top surface of the water tank. The inlet of the water pump is communicated with the inner bottom of the water tank through a first water pipe, and the outlet of the water pump is communicated with the water storage bin communicating with the atomizing nozzle through a second water pipe, and the outlet of the water pump is communicated with the water storage bin communicating with the spray head through a third water pipe.

[0010] Preferably, an air outlet pipe is fixedly installed at the top of the air outlet. One end of the air outlet pipe far away from its connection with the air outlet at the top of the treatment tank is communicated with a negative pressure machine, and the air exhaust port of the negative pressure machine is communicated with a transfer station.

[0011] Preferably, a valve is fixedly installed on the surface of the waste liquid outlet. A funnel is fixedly connected to the top of the waste liquid outlet, and the funnel is welded to the liquid outlet area at the bottom of the treatment tank.

[0012] Preferably, a valve is fixedly installed on the surface of the liquid outlet pipe of the waste liquid outlet. A funnel is fixedly connected to the top of the liquid outlet pipe of the waste liquid outlet, and the funnel is welded to the liquid outlet area at the bottom of the treatment tank.

[0013] Preferably, a liquid adding port is communicated with the right side of the top of the water tank. The surface of the liquid adding port is provided with threads, and a locking cover plate is threadedly connected to the liquid adding port.

[0014] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0015] In a biogas biological desulfurization device of the present utility model, by arranging a spray head, a Pall ring packing layer, an atomizing nozzle and a fiber honeycomb layer in the treatment tank, wherein the Pall ring packing layer and the spray head preliminarily neutralize the H2S gas in the biogas; the fiber honeycomb layer is formed by interweaving fluffy fibers; a large number of droplets in the high-pressure spray ejected by the atomizing nozzle are sprayed onto the fiber honeycomb layer, and the droplets form multiple layers of water films under the influence of the surface tension of water on the fiber honeycomb layer. When the biogas passes through the fiber honeycomb layer, it is equivalent to passing through multiple layers of water films, increasing the contact time and contact opportunity between the lye and the spray, so as to achieve the effect of finely treating and purifying the sulfide in the biogas; in addition, the present application also arranges an air outlet pipe at the top of the air outlet at the top of the treatment tank and connects a negative pressure machine at the other end of the air outlet pipe, so that the inside of the treatment tank is in a slightly negative pressure state, and the flow rate of the biogas is accelerated during use, improving the working efficiency. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 It is a structural schematic diagram of the present utility model;

[0018] In the above figures, 1 is the base; 2 is the treatment tank; 3 is the support column; 4 is the air inlet; 5 is the air outlet; 6 is the waste liquid outlet; 7 is the demister; 8 is the atomizing nozzle; 9 is the fiber honeycomb layer; 10 is the spray head; 11 is the Pall ring packing layer; 12 is the activated carbon filter layer; 13 is the water tank; 14 is the water pump; 15 is the first water pipe; 16 is the second water pipe; 17 is the third water pipe; 18 is the air outlet conduit; 19 is the negative pressure machine; 20 is the valve; 21 is the funnel; 22 is the liquid adding port. Specific embodiments

[0019] In order to more clearly understand the above objects, features and advantages of the present utility model, the present utility model will be further described below with reference to the drawings and embodiments. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0020] Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the present utility model is not limited by the specific embodiments disclosed in the following specification.

[0021] Embodiment 1, as Figure 1 shown, a biogas biological desulfurization device of the present application includes a base 1 and a treatment tank 2; the treatment tank 2 includes an air outlet area with a trapezoidal + rectangular + trapezoidal cross-section from top to bottom, a tower body area with a rectangular cross-section, and a liquid outlet area with a trapezoidal cross-section; the top surface of the base 1 is fixedly connected to the bottom side of the treatment tank 2 through a support column 3; a biogas inlet 4 is provided on the side of the treatment tank 2 at one-third from bottom to top, an air outlet 5 is provided on the top surface of the treatment tank 2, and a waste liquid outlet 6 is provided on the bottom surface of the treatment tank 2;

[0022] In the tower body area of the treatment tank 2, a demister 7, an atomizing nozzle 8, a fiber honeycomb layer 9, a spray head 10, a Pall ring packing layer 11, and an activated carbon filter layer 12 are sequentially arranged from top to bottom; the air inlet 4 is arranged between the Pall ring packing layer 11 and the activated carbon filter layer 12; among them, the fiber honeycomb layer 9 is formed by the interweaving of fluffy fibers, and a large number of droplets in the high-pressure spray ejected by the atomizing nozzle 8 are sprayed onto the fiber honeycomb layer 9. Under the influence of the surface tension of water, the droplets form multiple layers of water films on the fiber honeycomb layer 9. When the biogas passes through the fiber honeycomb layer 9, it is equivalent to passing through multiple layers of water films, increasing the contact time and contact opportunity between the lye and the spray, so as to achieve the effect of finely treating and purifying the sulfide in the biogas; the Pall ring packing layer 11 conducts a preliminary neutralization reaction on the biogas, and the activated carbon filter layer 12 conducts a preliminary adsorption on the neutralized waste liquid, reducing the pollution caused by the discharge of the waste liquid; the demister 7 separates the water and gas components in the purified gas, improving the use efficiency of the biogas biological desulfurization device;

[0023] On the top surface of the base 1, a water tank 13 filled with lye is also fixedly installed, and the water tank 13 is arranged on the left side of the treatment tank 2; the water tank 13 stores lye; a water pump 14 is fixedly installed on the top surface of the water tank 13; the inlet of the water pump 14 is communicated with the bottom inside of the water tank 13 through a first water pipe 15, and the outlet of the water pump 14 is communicated with the water storage bin communicating with the atomizing nozzle 8 through a second water pipe 16, and the outlet of the water pump 14 is communicated with the water storage bin communicating with the spray head 10 through a third water pipe 17; during use, the motor on the back of the water pump 14 is started to pump the lye in the water tank 13 to the atomizing nozzle 8 and the spray head 10 for spraying, and react with the H2S gas in the biogas;

[0024] On the top of the air outlet 5, an air outlet conduit 18 is fixedly installed. One end of the air outlet conduit 18 far from its connection with the air outlet 5 at the top of the treatment tank 2 is communicated with a negative pressure machine 19, and the exhaust port of the negative pressure machine 19 is communicated with a transfer station; the biogas in the transfer station is the biogas after desulfurization to enter the next process; during use, the motor on the back of the negative pressure machine 19 is enabled to make the inside of the treatment tank 2 in a slightly negative pressure state. The negative pressure machine 19 can not only accelerate the biogas flow rate and improve the working efficiency during use, but also can discharge the air inside the treatment tank 2 in advance during the desulfurization preparation work to prevent the reaction between the biogas and the air;

[0025] A valve 20 is fixedly installed on the surface of the liquid outlet pipe of the waste liquid port 6; through the setting of the waste liquid port 6 and the valve 20, the filtered waste liquid can be uniformly discharged; a funnel 21 is fixedly connected to the top of the liquid outlet pipe of the waste liquid port 6, and the funnel 21 is welded to the bottom liquid outlet area of the treatment tank 2; specifically, the outer side surface of the top ring of the funnel 21 is welded to the inner wall of the bottom of the treatment tank 2, and there is no gap at the welding place; the setting of the funnel 21 is beneficial to avoiding the accumulation of waste liquid at the bottom of the treatment tank 2 and improving the liquid discharge efficiency;

[0026] On the right side of the top of the water tank 13, there is a liquid filling port 22 connected. The surface of the liquid filling port 22 is provided with threads, and a locking cover plate is threadedly connected to the liquid filling port 22. A sealing rubber ring is arranged at the connection between the liquid filling port 22 and the locking cover plate. The liquid filling port 22 and the locking cover plate are provided to facilitate the addition of lye into the water tank 13.

[0027] The above are only the preferred embodiments of the present invention, and do not limit the present invention in other forms. Any person skilled in the art may use the disclosed technical content to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A biogas biological desulfurization device, comprising a base (1) and a treatment tank (2); the top surface of the base (1) is fixedly connected to the bottom side of the treatment tank (2) through a support column (3); a biogas inlet (4) is provided on the side of the treatment tank (2) at a position one third from bottom to top, characterized in that: The top surface of the processing tank (2) is provided with a gas outlet (5), and the bottom surface of the processing tank (2) is provided with a waste liquid outlet (6); The tower body area of ​​the treatment tank (2) is provided with a demister (7), an atomizing nozzle (8), a fiber honeycomb layer (9), a spray head (10), a ball ring packing layer (11) and an activated carbon filter layer (12) in order from top to bottom; the air inlet (4) is provided between the ball ring packing layer (11) and the activated carbon filter layer (12); A water tank (13) filled with alkaline solution is also fixedly mounted on the top surface of the base (1), and the water tank (13) is arranged on the left side of the treatment tank (2); a water pump (14) is fixedly mounted on the top surface of the water tank (13); the inlet of the water pump (14) is connected to the bottom of the water tank (13) through a first water pipe (15), the outlet of the water pump (14) is connected to a water storage tank connected to the atomizing nozzle (8) through a second water pipe (16), and the outlet of the water pump (14) is connected to a water storage tank connected to the spray head (10) through a third water pipe (17).

2. A biogas biological desulfurization device according to claim 1, characterized in that: An air outlet duct (18) is fixedly mounted on the top of the air outlet (5); an end of the air outlet duct (18) away from the end thereof connected to the air outlet (5) on the top of the processing tank (2) is connected to a negative pressure machine (19); and an exhaust port of the negative pressure machine (19) is connected to a transfer station.

3. A biogas biological desulfurization device according to claim 1, characterized in that: A valve (20) is fixedly mounted on the surface of the liquid outlet pipe of the waste liquid outlet (6); a funnel (21) is fixedly connected to the top of the liquid outlet pipe of the waste liquid outlet (6), and the funnel (21) is welded to the liquid outlet area at the bottom of the processing tank (2).

4. A biogas biological desulfurization device according to claim 1, characterized in that: The top right side of the water tank (13) is connected to a liquid filling port (22), the surface of the liquid filling port (22) is provided with threads, and the liquid filling port (22) is threadedly connected to a locking cover plate.

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