Biological washing tower for malodorous gas

Abstract

The utility model discloses a malodorous gas biological washing tower which comprises a vertically mounted tower body, a gas distribution pipe mounted in the center of the tower body, a gas inlet pipe communicated with the upper end of the gas distribution pipe, a sealed lower end of the gas distribution pipe, a spiral pipe arranged in the tower body and sleeved with the gas distribution pipe, a sealed upper end of the gas distribution pipe and a sealed lower end pipe orifice positioned at the bottom of the tower body and communicated with an exhaust pipe, fine holes are formed in the side walls of the gas distribution pipe and the spiral pipe, and the tower body is filled with microbial filler. Malodorous gas enters the gas distribution pipe through the gas inlet pipe, further penetrates through the filler layer through the gas holes, is metabolized by microorganisms, and is finally collected and discharged through the spiral pipe. In the process, the spiral pipe is inserted into the filler layer, and the side wall can be used for collecting gas, so that the gas collecting rate is greatly improved, and the problem of low filtering efficiency of the traditional layered filler layer is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of odor treatment equipment, in particular to a biological scrubbing tower for malodorous gases. Background Art

[0002] The electroplating industrial park is equipped with a heavy metal wastewater treatment plant. The main components of the odorous gases produced by the sewage treatment plant are NH3 and H2S, with low concentrations and little fluctuation.

[0003] At present, the commonly used methods for treating malodorous gases mainly include combustion method, water absorption method, liquid absorption method, adsorption method, UV photolysis oxidation method, and biological method. Among these methods, the biological method is suitable for treating malodorous gases with small fluctuations in gas concentration, low concentration or complex components, with high purification efficiency and low treatment cost. The disadvantages are that it occupies a large area, the filler needs to be replaced regularly, and the operation is complicated. Utility Model Content

[0004] The utility model aims to provide a biological scrubber for malodorous gases, so as to solve the problem of filtering efficiency of traditional microbial filling layers.

[0005] In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

[0006] A malodorous gas biological scrubbing tower comprises a vertically mounted tower body, wherein an air distribution pipe is mounted at the center of the tower body, the air distribution pipe is a pipe structure, and extends from top to bottom along the length direction of the tower body; the upper end of the air distribution pipe is connected to an air inlet pipe, and the lower end is sealed;

[0007] The tower body also has a spiral tube, which is sleeved with an air distribution pipe, the upper end of the air distribution pipe is sealed, and the lower end of the pipe is located at the bottom of the tower body and connected to an exhaust pipe;

[0008] The side walls of the air distribution pipe and the spiral pipe are both provided with fine holes, and the space between the air distribution pipe and the inner wall of the tower body is filled with microbial fillers.

[0009] Furthermore, a water distribution pipe is sleeved inside the air distribution pipe, the water distribution pipe extends along the length direction of the air distribution pipe, and a plurality of atomizing nozzles are evenly installed on the side wall of the water distribution pipe.

[0010] Furthermore, the tower body has an annular cover plate at the top, which can be detachably installed, and the cover plate is used to seal the upper opening side of the tower body. The bottom of the air distribution pipe is supported by a support rod between the bottom of the tower body, and the bottom of the tower body has an annular support plate, which can be detachably installed and used to support the microbial filler.

[0011] A conical water collector is installed at the bottom of the air distribution pipe and is controlled by a valve.

[0012] The utility model has the following beneficial effects: the malodorous gas enters the air distribution pipe through the air inlet pipe, further passes through the packing layer through the air holes, undergoes metabolism by microorganisms, and is finally collected and discharged through the spiral pipe. In the process, since the spiral pipe is inserted into the packing layer and the side walls can be used to collect gas, the gas collection rate is greatly improved, avoiding the problem of low filtration efficiency of the traditional hierarchical packing layer.

[0013] A carrier for the growth and aggregation of microorganisms is set in the waste gas washing tower. Under oxygenated conditions, the microorganisms accumulate and adhere to the surface of the filler to form a biofilm.

[0014] When the waste gas passes through, the microorganisms in the biofilm absorb and decompose the organic matter in the waste gas, purifying the waste gas. At the same time, the microorganisms also proliferate, and the biofilm thickens. When the biofilm grows to a certain thickness, the oxygen diffusion into the biofilm is limited, and its surface is still aerobic, while the inner layer will be hypoxic or even anaerobic, causing the biofilm to fall off.

[0015] New biofilm will continue to grow on the surface of the filler, and the cycle will continue over and over again to purify the exhaust gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments are briefly introduced below.

[0017] Figure 1 : Schematic diagram of the structure of the utility model.

[0018] In the accompanying drawings, the components represented by each reference numeral are listed as follows: tower body 1, air distribution pipe 3, air inlet pipe 30, spiral pipe 2, exhaust pipe 21, water distribution pipe 4, atomizing nozzle 41, cover plate 11, support plate 12, water collector 31, valve 32. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] like Figure 1 As shown: a malodorous gas biological scrubbing tower, including a vertically installed tower body 1, which is a columnar structure as a whole, has a circular cross-section, and a cavity inside. The tower body is elevated by a bottom support frame, and an air distribution pipe 3 is installed at the central position of the tower body 1. The air distribution pipe 3 is a pipe structure and extends from top to bottom along the length direction of the tower body 1; the upper end of the air distribution pipe 3 is connected to the air inlet pipe 30, and the lower end is sealed;

[0021] The tower body 1 also has a spiral tube 2, which is sleeved with an air distribution pipe 3. The upper end of the air distribution pipe 3 is sealed, and the lower end pipe opening is located at the bottom of the tower body 1 and is connected to an exhaust pipe 21; the lower end pipe opening passes through the side wall of the tower body through the exhaust pipe and extends outside the tower body.

[0022] The side walls of the air distribution pipe 3 and the spiral pipe 2 are both provided with fine holes with a hole diameter of about 5 mm. The tower body 1 is filled with microbial fillers between the air distribution pipe 3 and the inner wall. The microbial fillers cultivate useful microorganisms that can decompose malodorous gas components at an appropriate temperature. The biomass strain carrier fillers exert the effect of specific bacteria under the conditions that meet the requirements, so that pollutants can be effectively decomposed and removed to achieve the purpose of removing waste gas and odor. The microorganisms in the biofilm on the surface of the biological fillers use malodorous gas substances as nutrition. Malodorous substances and VOCs are oxidized and decomposed by microorganisms, and energy is generated during the conversion process, which provides energy for the growth and reproduction of microorganisms, so that the conversion of malodorous gas substances continues, and the purified gas is discharged by the induced draft fan.

[0023] The microbial filler is granular, and the carrier is a sphere-like particle. The main component is inorganic material. The surface adsorbs and cultivates microorganisms. The particle diameter is about 10 mm. It is used as a filler layer to metabolize malodorous gases. The filler is granular and the pore size is larger than the pore size of the fine pores.

[0024] Malodorous gas enters the air distribution pipe from the air inlet pipe, further passes through the packing layer through the pores, undergoes metabolism by microorganisms, and is finally collected and discharged through the spiral tube. In the process, since the spiral tube is interspersed in the packing layer and the side walls can be used to collect gas, the gas collection rate is greatly improved, avoiding the problem of low filtration efficiency of traditional layered packing layers.

[0025] The air distribution pipe 3 is sleeved with a water distribution pipe 4, which extends along the length of the air distribution pipe 3. A plurality of atomizing nozzles 41 are evenly installed on the side wall of the water distribution pipe 4. It is used to replenish water to the microbial filler layer. The metabolism of microorganisms requires a water source. The atomizing nozzle sprays atomized water droplets. With the action of air intake, the airflow cooperates with the water droplets to pass through the microbial filler. The tower body 1 has a ring-shaped cover plate 11 at the corresponding top, which can be detachably installed. The cover plate 11 is used to seal the upper opening side of the tower body 1. The bottom of the air distribution pipe 3 and the bottom of the tower body 1 are supported by a support rod. The bottom of the tower body 1 has a ring-shaped support plate 12, which is detachably installed to support the microbial filler. The top and bottom corresponding to the tower body are both annular seals. The corresponding annular grooves in the center of the cover plate and the support plate are used to accommodate the air distribution pipe. The cover plate and the support plate are both detachably installed to replace or flush the filler after disassembly. The filler is composed of a carrier and microorganisms. Microbial metabolism will form a layer of biofilm on the outside, which needs to be cleaned or replaced regularly to ensure the treatment effect of odor.

[0026] A conical water collector 31 is installed at the bottom of the air distribution pipe 3, which is controlled by a valve 32. A water distribution device is installed inside the air distribution pipe, and excess water is collected at the bottom of the air distribution pipe, and the valve needs to be opened regularly for cleaning.

[0027] This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can better understand and utilize the present invention.

Claims

1. A biological scrubber for malodorous gases, characterized in that: It comprises a vertically mounted tower body (1), wherein an air distribution pipe (3) is mounted at the center of the tower body (1), wherein the air distribution pipe (3) is a pipe structure and extends from top to bottom along the length direction of the tower body (1); the upper end of the air distribution pipe (3) is connected to an air inlet pipe (30), and the lower end is sealed; The tower body (1) further comprises a spiral tube (2), the spiral tube (2) being sleeved with an air distribution pipe (3), the air distribution pipe (3) having an upper end sealed and a lower end located at the bottom of the tower body (1) and connected to an exhaust pipe (21); The side walls of the air distribution pipe (3) and the spiral pipe (2) are both provided with fine holes, and the tower body (1) is filled with microbial fillers between the air distribution pipe (3) and the inner wall.

2. The malodorous gas biological scrubber according to claim 1, characterized in that: A water distribution pipe (4) is sleeved inside the air distribution pipe (3), the water distribution pipe (4) extends along the length direction of the air distribution pipe (3), and a plurality of atomizing nozzles (41) are evenly mounted on the side wall of the water distribution pipe (4).

3. The malodorous gas biological scrubber according to claim 1, characterized in that: The tower body (1) has a ring-shaped cover plate (11) at the corresponding top, which can be detachably installed. The cover plate (11) is used to seal the upper opening side of the tower body (1).

4. The malodorous gas biological scrubber according to claim 3, characterized in that: The bottom of the air distribution pipe (3) and the bottom of the tower body (1) are supported by support rods, and the bottom of the tower body (1) has an annular support plate (12), which is detachably mounted and used to support microbial fillers.

5. The malodorous gas biological scrubber according to claim 2, characterized in that: A conical water collector (31) is installed at the bottom of the air distribution pipe (3) and is controlled by a valve (32).

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