CN205055776U - Handle integrated equipment of foul gas - Google Patents

Abstract

The utility model discloses an integrated equipment for treating malodorous gas; the equipment includes an integrated box body, low-temperature plasma equipment, a multi-effect biological trickling filter tower and a monitoring system; the low-temperature plasma equipment, a multi-effect biological trickling filter tower and a monitoring system The system is distributed in the box and connected in turn by pipelines. The air inlet and exhaust port are set outside the box; the multi-effect biological trickling filter tower is equipped with liquid level monitoring, pH meter, dissolved oxygen meter, temperature probe, and dosing heating system , with automatic regulation of culture medium parameters and automatic alarm function.

Description

An integrated device for treating malodorous gas

technical field

The invention relates to an integrated equipment for treating malodorous gas, which belongs to the technical field of environmental protection.

Background technique

Malodorous gas refers to all gaseous substances that stimulate the olfactory organs, cause people's unpleasantness and damage the living environment. It is widely distributed and affects people in many ways. It not only breeds a large number of bacteria that spread diseases, but also directly stimulates the respiratory system, nervous system, circulatory system, and endocrine system through the olfactory system. human health. With the gradual improvement of people's requirements for the quality of living environment, people are becoming more and more intolerable to various odors, and stench has become a serious social and environmental problem, and is listed as one of the seven major public hazards in the world.

Malodorous substances can be divided into five categories according to their composition: sulfur-containing compounds, nitrogen-containing compounds, halogens and their derivatives, hydrocarbons, and oxygen-containing organic substances. The main sources are: agricultural and animal husbandry stench, industrial stench and urban public facilities stench, such as waste treatment plants, sewage treatment plants, waste transfer stations, landfills, etc. The places that can produce malodorous gas are widely distributed and are sensitive to the impact on surrounding residents and the environment.

At present, the methods for dealing with malodorous gases mainly include physical methods, chemical methods and biological methods. The physical method means not changing the chemical properties of the odorous substance. The common ones include dilution method, masking method, adsorption method and condensation method, etc.; the chemical method is to use another substance to interact with the odorous substance, and produce a new odorless and odorless substance after the reaction. Harmful substances, so as to achieve the purpose of purification, common oxidation method and combustion method, etc.; biological method is to use the metabolic degradation of microorganisms to decompose and convert odorous substances into CO ₂ , H ₂ O, N ₂ , nitrate, sulfate The common ones are biological filtration, biological trickling and biological washing.

With the improvement of national environmental standards, it is difficult for the existing treatment methods to effectively solve the problem of up-to-standard discharge of odorous gases, especially when dealing with odorous gases with complex components, high concentrations and large fluctuations in content, many problems will still be encountered. Such as poor adaptability, high operating costs, low treatment efficiency and non-standard emissions. Low-temperature plasma technology is a brand-new interdisciplinary technology, and it is considered to be one of the few practical processes that can achieve simultaneous control of pollutants. This technology uses the high-energy electrons emitted by the ion emission device to hit the gas molecules to generate free radicals such as oxygen atoms. The high-energy electrons, oxygen atoms and other free radicals work together to decompose the malodorous gas components into CO ₂ , H ₂ O and other easily soluble product of water. Low-temperature plasma has a high degree of automation, simple process, strong adaptability to pollutant types and concentration changes, and is easy to combine with traditional processes. Hydrogen sulfide, ammonia, methyl mercaptans, methyl sulfides, and carbonyl sulfide are common main odor-causing gas components. Biological methods can achieve a removal rate of 90% for relatively simple small molecules such as hydrogen sulfide and ammonia. % or more, but the removal effect of other complex macromolecular components is not good, especially when the concentration is high or the fluctuation is more drastic, the biological method is not competent.

Contents of the invention

The object of the present invention is to provide an integrated device for low-temperature plasma coupling multi-effect biological trickling filter for treating malodorous gas.

In order to make the above possible, the present invention adopts the following technical solutions.

Construct an integrated equipment for treating malodorous gas, which includes an integrated box, low-temperature plasma equipment, multi-effect biological trickling filter tower and monitoring system. The monitoring system is used to control the parameters of the culture medium. The integrated box can be selected from different materials according to needs. ;The low-temperature plasma equipment, multi-effect biological trickling filter tower and monitoring system are distributed in the box, and are connected in turn by pipelines, and the air inlet and exhaust port are set outside the box; the spraying on each layer of the multi-effect biological trickling filter tower The devices are equipped with flow meters and flow regulating valves to adjust the amount of cultivation spraying respectively. The bottom of the tower is a culture liquid circulation tank, which is an integrated device with the tower body. The tank is equipped with liquid level monitoring, pH meter, dissolved oxygen meter, temperature probe, And dosing heating system, with automatic regulation of culture medium parameters and automatic alarm function.

First, by applying high-voltage and high-frequency alternating current between the low-temperature plasma electrodes, it induces a high electric field, which promotes the acceleration of free electrons in the discharge space. At this time, the electrons will be accelerated in the electric field to obtain sufficient energy. , and then generate many highly active substances such as electrons, ions, metastable particles and free radicals, such as hydroxyl, ground state oxygen atoms, metastable oxygen atoms, etc. These high energy and strong oxidizing substances can eventually oxidize the malodorous gas into SO ₂ , NO _x , CO ₂ and H ₂ O, etc. Using low-temperature plasma equipment to treat odorous gases has high efficiency, simple process, low operating cost, and can oxidize and remove most of the odorous substances. However, the generated gas still contains a small amount of odorous substances and other products. Easy to produce secondary pollution.

Secondly, after the malodorous gas is treated with low-temperature plasma, it enters the multi-effect biological trickling filter tower. The multi-effect biological trickling filter tower is mainly divided into the tower body and the packing part. The culture solution containing nutrients is sprayed down by the liquid distribution device at the top of the tower, and contacts with the malodorous gas up the tower, so that the odorous pollutants in the gas phase and oxygen into the liquid phase, and then decomposed and absorbed by the microorganisms on the filler, and the culture fluid is collected and recycled. The multi-effect biological trickling filter tower adopts spraying the nutrient solution at different heights of the tower body, which not only can absorb and remove the malodorous gas more efficiently, but also can make the microorganisms at different heights in the tower body evenly use the nutrients in the spray liquid, It is easier for the growth of microorganisms, and there is an appropriate space between the fillers to facilitate gas mixing. This also improves the treatment efficiency of malodorous gas and the stability of trickling filter operation to a certain extent. At the same time, the packing of the trickling filter tower is fixed with special bacterial flora for degrading odorous gases. This bacterial flora is a mixed flora with high degradation efficiency for odorous substances obtained by strictly screening the bacteria in activated sludge with malodorous substances. After immobilization, the mixed flora is fixed on the filler; the filler material is polyvinyl alcohol, sodium alginate, polylactic acid or polyamino acid; the degradation efficiency of the multi-effect biological trickling filter tower for odorous substances is much higher than that of ordinary trickling filtration Tower; After the malodorous gas is oxidized by low-temperature plasma, most of the malodorous gas is oxidized, and the macromolecular substances are oxidized into small molecular substances at the same time. A small amount of unoxidized substances and oxidized products enter the multi-effect trickling filter tower with the airflow. Under the action of microorganisms, the substances in the gas are absorbed and degraded, and the purified gas is discharged up to the standard.

The advantages of this set of technology and equipment are: (1) The low-temperature plasma ensures the rapid oxidation of the odorous gas, and the multi-effect biological trickling filter tower ensures that the gas is discharged up to the standard. After the coupling of the two, it can improve the impact load resistance, enhance the adaptability, and ensure The malodorous gas is discharged up to the standard; (2) The treatment efficiency of the multi-effect biological trickling filter tower is improved, and the volume is correspondingly reduced; (3) The integrated equipment has a compact structure, a reduced footprint, simple operation, and convenient movement, and is more suitable for dealing with sudden odors Gas pollution sources, irregular discharge pollution sources, etc.; (4) Due to the improvement of the treatment efficiency of the multi-effect biological trickling filter tower, the design of low-temperature plasma equipment and the scale of the trickling filter tower can be balanced, and the construction cost and operating cost of the project can be greatly reduced. It can be seen that compared with similar processes and devices for treating malodorous gases, this device has unique technical advantages, which can significantly improve processing efficiency, reduce costs, and enhance practicability.

Description of drawings

Fig. 1 Schematic diagram of integrated equipment for treating malodorous gas.

In the figure, 1. Outer frame of integrated equipment, 2. Air inlet, 3. Low temperature plasma equipment, 4. High voltage power supply, 5. Control cabinet, 6. Culture liquid circulation tank, 7. Filling material, 8. Biological trickling filter tower, 9. Exhaust port.

detailed description

The process and equipment in the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

The integrated equipment is composed of a low-temperature plasma system and a biological trickling filtration system, including: 1 Outer frame of the integrated equipment, 2 Air inlet, 3 Low-temperature plasma equipment, 4 High-voltage power supply, 5 Control cabinet, 6 Culture solution circulation tank, 7 packing, 8 biological trickling filter tower and 9 exhaust port. The system processing process has the following steps: 1. The malodorous gas first enters the low-temperature plasma device 3 through the air inlet 2 and stays there for 1-10 seconds. Then, under the action of its high-voltage electric field and the many active particles with strong oxidizing properties, most of the malodorous substances are oxidized, and the remaining incompletely oxidized substances are also converted into relatively biochemical small molecular substances; 2. After low temperature The gas after plasma treatment enters the multi-effect biological trickling filter tower 8 . The gas moves upward from the bottom of the tower through the gas distribution system, passes through the layered biological filler, and is discharged from the exhaust port 9. The spray liquid flows through the spray system from top to bottom in different packing layers. After the upward-moving gas contacts the downward-flowing spray liquid, the malodorous substances in the gas are dissolved in the spray liquid, and are further absorbed by the biofilm on the filler 7, and finally degraded rapidly by the specific microbial flora on the filler. After the malodorous gas passes through the filler, the malodorous substance is adsorbed and degraded, and the clean gas is discharged out of the system through the exhaust port 9 . 3. After the culture medium passes through the biological filler, it is collected by the circulation tank and can be recycled.

The outer frame 1 of the integrated device can be made of different materials according to the frequency of movement. The multi-effect biological trickling filter tower contains multiple layers of biological fillers 7, and a spray system is arranged above each layer.

Example 1: Low-temperature plasma coupling multi-effect biological trickling filter tower to treat malodorous gas

Combined with common malodorous gas components, the device treats mixed malodorous gases containing H ₂ S, carbon disulfide, methyl mercaptan, carbonyl sulfide (COS), dimethyl sulfide and dimethyl disulfide, with a removal rate of over 99%. High processing efficiency, stable operation, relatively low cost.

Claims (6)

1. An integrated device for processing malodorous gases, characterized in that: the device includes an integrated cabinet, low-temperature plasma equipment, a multi-effect biological trickling filter tower and a monitoring system; the monitoring system is used to regulate the parameters of the culture solution. 2. An integrated equipment for treating malodorous gas according to claim 1, characterized in that: the integrated box body can be made of different materials according to needs; low-temperature plasma equipment, multi-effect biological trickling filter tower and monitoring system are distributed in the box body , and use pipes to connect in sequence, and the air inlet and exhaust port are set outside the box. 3. A kind of integrated equipment for treating malodorous gas according to claim 1, characterized in that the packing of the multi-effect biological trickling filter is divided into multiple layers, and the upper part of each layer of packing is provided with a spray device, and there is an appropriate space between the packing. space for gas mixing. 4. A kind of integrated equipment for processing malodorous gas according to claim 1, characterized in that the spray device on each layer of filler inside the multi-effect biological trickling filter tower is provided with a flow meter and a flow regulating valve to adjust the cultivation spray respectively. amount of shower. 5. A kind of integrated equipment for treating malodorous gas according to claim 1, characterized in that a specific bacterial flora capable of efficiently degrading malodorous substances is fixed on the filler of the multi-effect biological trickling filter, and the flora is a mixed flora; The filler material is polyvinyl alcohol, sodium alginate, polylactic acid or polyamino acid. 6. A kind of integrated equipment for processing malodorous gas according to claim 1, characterized in that the bottom of the multi-effect biological trickling filter is a culture solution circulation tank, which is an integrated equipment with the trickling filter body, and the liquid is set in the circulation tank. Surface monitoring, pH meter, dissolved oxygen meter, temperature probe, and dosing heating system, with automatic regulation of culture medium parameters and automatic alarm function.