Biological desulfurization biogas purification system

Abstract

The utility model relates to the field of biogas treatment especially relates to a biological desulfurization biogas purification system, including gas holder, dust removal tower, biological desulfurization tower, are connected in proper order through pipeline, the top of dust removal tower is provided with gas outlet, is provided with air inlet at the bottom, is equipped with annular pipe at the top, is provided with a plurality of atomizing nozzles on the annular pipe, is equipped with a plurality of layers of slow flow plate below the annular pipe, is provided with a plurality of sand hour type through -holes on the slow flow plate, is installed ultrasonic generator below the slow flow plate, is equipped with liquid collecting hopper at the bottom of dust removal tower, installs liquid discharge valve on the liquid collecting hopper. The utility model carries out the pretreatment of dust removal to the biogas, improves the efficiency of biological desulfurization.

Description

Technical Field

[0001] This utility model relates to the field of biogas treatment, and in particular to a biological desulfurization biogas purification system. Background Technology

[0002] Biogas, as a renewable energy source, is mainly composed of methane. However, the hydrogen sulfide (H2S), moisture, and particulate matter mixed in it can corrode equipment, reduce combustion efficiency, and cause environmental pollution. Existing biological desulfurization technologies use microorganisms to oxidize hydrogen sulfide, but their efficiency is highly dependent on the quality of biogas pretreatment. Current spray tower technologies suffer from short gas-liquid contact times, uneven droplet distribution, and when high-humidity biogas enters the desulfurization tower, moisture condensation easily forms a localized acidic environment, disrupting the metabolic balance of the microbial community, leading to fluctuations in desulfurization efficiency and reducing the efficiency of subsequent biological desulfurization.

[0003] Based on this, the present invention designs a biological desulfurization biogas purification system to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide a biological desulfurization biogas purification system to solve the problems in the prior art.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] A biological desulfurization biogas purification system includes a gas storage tank, a dust removal tower, and a biological desulfurization tower, which are connected in sequence by pipelines. The dust removal tower has an outlet at the top and an inlet at the bottom. The top is equipped with an annular pipe with several atomizing nozzles. Below the annular pipe are several layers of flow-retarding plates with several hourglass-shaped through holes. An ultrasonic generator is installed below the flow-retarding plates. The bottom of the dust removal tower is equipped with a liquid collection funnel with a drain valve installed on it.

[0007] The gas storage tank is connected to the air inlet through a preheating pipe, which is inclined toward the biological desulfurization tower.

[0008] The through holes on adjacent upper and lower flow-retardant plates are staggered in the vertical direction.

[0009] The air intake is a tangential intake type.

[0010] The gas outlet is connected to the biological desulfurization tower.

[0011] This utility model has the following beneficial effects:

[0012] The hourglass-shaped flow buffer plate and ultrasonic agglomeration work together to increase the gas-liquid contact area and improve dust removal efficiency. The preheating pipe is used to heat the biogas, avoiding sudden temperature changes in the biological desulfurization tower. At the same time, the inclined design promotes the self-drainage of condensate and reduces the need for additional heat sources. The alkaline circulating spray liquid pre-neutralizes the acidic components, providing a suitable pH environment for the subsequent biological desulfurization bacteria, ensuring the continuous and efficient desulfurization reaction. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a three-dimensional cross-sectional view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0017] The attached diagram lists the components represented by each number as follows:

[0018] 1. Dust removal tower; 2. Air outlet; 3. Air inlet; 4. Circular pipe; 6. Atomizing nozzle; 7. Flow buffer; 8. Through hole; 9. Ultrasonic generator; 10. Liquid collection funnel; 11. Preheating pipe. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. It should be understood that the terms "upper", "middle", "outer", "inner", "lower" etc., which indicate orientation or positional relationship, are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0020] The attached figures illustrate specific embodiments of this utility model, such as... Figures 1-3As shown, this utility model is a biological desulfurization biogas purification system, including a gas storage tank, a dust removal tower 1, and a biological desulfurization tower, which are connected sequentially by pipes. The gas outlet 2 at the top of the dust removal tower 1 is connected to the gas inlet pipe at the bottom of the biological desulfurization tower via an insulated pipe. The dust removal tower 1 has a gas outlet 2 at the top and a gas inlet 3 at the bottom. The gas inlet 3 is a tangential inlet, which can form a swirling flow, causing particulate matter to impact the inner wall and settle. The top is equipped with a single layer or multiple layers of annular pipes 4, with atomizing nozzles 6 arranged at 15cm intervals. The spray liquid is circulating alkaline water. Several layers of flow-damping plates 7 are horizontally installed below the annular pipes 4, with a certain distance between adjacent flow-damping plates 7. If it is a multi-layer annular pipe 4, a layer of annular pipe 4 can also be set between adjacent flow-damping plates 7 to enhance the atomization concentration effect. Several hourglass-shaped through holes 8 are formed on the flow-slowing plate 7. The through holes 8 on adjacent flow-slowing plates 7 are staggered vertically. The downward dripping water mist will block the middle section of the through holes 8, and the upward gas is also dispersed by the staggered through holes 8, which counteracts the water mist, increases the residence time of water mist and gas, and achieves full gas-liquid contact. An ultrasonic generator 9 is installed below the flow-slowing plate 7. It can use sound waves to agglomerate and cause the water mist in the biogas to vibrate, forming larger droplets. A conical liquid collection funnel 10 is provided at the bottom of the dust removal tower 1 to collect droplets containing impurities. A liquid level sensor is set to link the liquid discharge valve. The gas storage tank is connected to the gas inlet 3 through the preheating pipe 11. The heated biogas can improve the biosulfurization efficiency. The preheating pipe 11 is inclined towards the biosulfurization tower to promote the self-drainage of condensate.

[0021] In operation, biogas enters through the tangential inlet 3 at the bottom of the dust removal tower 1, forming a vortex within the tower. Particulate matter carried in the biogas impacts the inner wall of the tower under centrifugal force and settles. Atomizing nozzles 6 on the annular pipe at the top of the tower 1 spray circulating alkaline water mist downwards evenly. This mist then passes through several layers of flow-damping plates 7 horizontally installed below the annular pipe. After being agglomerated by the ultrasonic generator 9, droplets containing impurities flow downwards under gravity, eventually collecting in the conical collection funnel 10 at the bottom of the tower. A level sensor monitors the liquid level in the collection funnel 10 in real time. When the preset level is reached, the drain valve opens, discharging the collected liquid containing impurities. After draining, the drain valve automatically closes. The collection funnel 10 can also be directly connected to a circulating alkaline solution recovery device for secondary use of the circulating alkaline water.

[0022] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to specific implementation methods.

Claims

1. A biological desulfurization biogas purification system, comprising a gas storage tank, a dust removal tower (1), and a biological desulfurization tower, connected sequentially by pipelines, characterized in that: The dust removal tower (1) has an air outlet (2) at the top and an air inlet (3) at the bottom. The top is equipped with an annular pipe (4), and several atomizing nozzles (6) are installed on the annular pipe (4). Several layers of slow flow plates (7) are installed below the annular pipe (4). Several hourglass-shaped through holes (8) are installed on the slow flow plates (7). An ultrasonic generator (9) is installed below the slow flow plates (7). The bottom of the dust removal tower (1) is equipped with a liquid collection funnel (10), and a drain valve is installed on the liquid collection funnel (10).

2. The biological desulfurization biogas purification system according to claim 1, characterized in that: The gas storage tank is connected to the air inlet (3) through the preheating pipe (11), and the preheating pipe (11) is inclined toward the biological desulfurization tower.

3. The biological desulfurization biogas purification system according to claim 1, characterized in that: The air inlet (3) is a tangential air intake type.

4. The biological desulfurization biogas purification system according to claim 1, characterized in that: The gas outlet (2) is connected to the biological desulfurization tower.

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