CN212492295U

CN212492295U - Waste gas treatment device between grids of sewage treatment station

Info

Publication number: CN212492295U
Application number: CN202020715927.4U
Authority: CN
Inventors: 张承波; 毛建英; 赵辉
Original assignee: Shuiyan Future Beijing Environmental Engineering Technology Co ltd
Current assignee: Shuiyan Future Beijing Environmental Engineering Technology Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-02-09
Anticipated expiration: 2030-04-30

Abstract

The utility model provides a waste gas treatment device between grids of a sewage treatment station, which belongs to the technical field of waste gas treatment equipment and aims to solve the problem of difficult waste gas treatment between grids of the current sewage treatment station; comprises a machine shell, a wind collecting system, a low-temperature plasma generator and an active carbon adsorption unit, wherein the wind collecting system, the low-temperature plasma generator and the active carbon adsorption unit are fixedly arranged in the machine shell; the wind collecting system is arranged at the bottom of the inner side of the shell; the active carbon adsorption unit is arranged at the top of the inner side of the shell; the low-temperature plasma generator is arranged in the shell between the air collecting system and the activated carbon adsorption unit; the design of the utility model can effectively solve the problem of difficult waste gas treatment between grids of the sewage treatment station; the device has the advantages of simple structure, high decomposition efficiency, rapid treatment, simple operation, low energy consumption, small occupied area and the like.

Description

Waste gas treatment device between grids of sewage treatment station

Technical Field

The utility model relates to a waste gas treatment equipment technical field specifically is a waste gas treatment device between sewage treatment station grids.

Background

In the process of sewage treatment, structures such as grid rooms, a sedimentation tank, a biochemical tank, a sludge dewatering machine room and the like can emit odor, wherein the odor among the grid rooms is the largest, and operation and maintenance personnel of a sewage station need to enter the grid rooms every day to clean grid residues. The peculiar smell mainly comprises sulfur compounds, nitrogen compounds and the like, such as hydrogen sulfide, ammonia gas, methane and the like, has strong pungent peculiar smell, has great harm to human bodies, can enter the human bodies through different approaches of respiratory tracts, eyes, skin and the like, and causes dizziness and discomfort. The nerve damage to the human body is great after being placed for a long time, and the problem needs to be solved urgently.

SUMMERY OF THE UTILITY MODEL

In view of the technical deficiencies, the utility model aims to provide a waste gas treatment device between grids of a sewage treatment station, which can effectively solve the problem of difficult waste gas treatment between grids of the sewage treatment station; the device has the advantages of simple structure, high decomposition efficiency, rapid treatment, simple operation, low energy consumption, small occupied area and the like.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a waste gas treatment device between grids of a sewage treatment station is characterized by comprising a machine shell, a wind collecting system, a low-temperature plasma generator and an active carbon adsorption unit, wherein the wind collecting system, the low-temperature plasma generator and the active carbon adsorption unit are fixedly arranged in the machine shell; the wind collecting system is arranged at the bottom of the inner side of the shell; the active carbon adsorption unit is arranged at the top of the inner side of the shell; the low-temperature plasma generator is arranged in the machine shell between the air collecting system and the activated carbon adsorption unit.

Preferably, the bottom of the machine shell is connected with an air inlet pipe, and the top of the machine shell is connected with an air outlet pipe.

Preferably, the wind collecting system comprises a bracket and a fan; the fan is fixedly arranged on the bracket.

Preferably, the activated carbon adsorption unit comprises two partition plates and an activated carbon filter element; the activated carbon filter element is arranged between the two partition plates.

The beneficial effects of the utility model reside in that: the design of the utility model can effectively solve the problem of difficult waste gas treatment between grids of the sewage treatment station; the device has the advantages of simple structure, high decomposition efficiency, rapid treatment, simple operation, low energy consumption, small occupied area and the like.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a block diagram of an exhaust treatment device between grids of a sewage treatment station provided by an embodiment of the utility model.

Description of reference numerals:

the air conditioner comprises an air outlet pipe 1, an active carbon adsorption unit 2, a low-temperature plasma generator 3, an air collecting system 4, a machine shell 5 and an air inlet pipe 6.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that in the description of the present invention, the terms "in", "up", "down", "horizontal", "inner", etc. indicate directions or positional relationships based on those shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; may be a mechanical connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1, a waste gas treatment device between grids of a sewage treatment station comprises a machine shell 5, and an air collecting system 4, a low-temperature plasma generator 3 and an activated carbon adsorption unit 2 which are fixedly arranged in the machine shell 5; the wind collecting system 4 is arranged at the bottom of the inner side of the shell; the active carbon adsorption unit 2 is arranged at the top of the inner side of the shell; the low-temperature plasma generator 3 is arranged in the machine shell between the wind collecting system 4 and the active carbon adsorption unit 2.

Further, the bottom of the machine shell 5 is connected with an air inlet pipe 6, and the top of the machine shell 5 is connected with an air outlet pipe 1.

Further, the wind collecting system 4 comprises a bracket and a fan; the fan is fixedly arranged on the bracket.

Further, the activated carbon adsorption unit 2 comprises two partition plates and an activated carbon filter element; the active carbon filter element is arranged between the two partition plates; the fan and the low-temperature plasma generator 3 are respectively and electrically connected with the PLC control box; waste gas is sucked into the machine shell through the air collecting system, is treated by the low-temperature plasma generator 3, is adsorbed by the activated carbon adsorption unit 2, and is discharged from the air outlet pipe 1.

Principle of treatment

Classification of plasma

The plasma is a conductive fluid composed of electrons, ions, atoms (ground state or excited state), molecules (excited state or ground state), radicals, and the like, which are formed by dissociation and ionization of gas molecules by energy excitation such as heating or external electric field and radiation. Plasmas can be classified into thermal equilibrium plasmas or thermal plasmas and non-equilibrium plasmas or low-temperature plasmas according to the temperature of particles. In thermal equilibrium plasma, the temperature of electrons and other particles is equal, generally above 5000K. In non-equilibrium plasma, the electron temperature is usually as high as tens of thousands of degrees, and the temperature of other particles is only 300-500K. Depending on the source of generation, the plasma can be divided into a radiation plasma and a discharge plasma.

Method for generating low-temperature plasma

Low temperature plasma is mainly generated by gas discharge, which means that one or several electrons are ionized from gas atoms or molecules by some mechanism to form a gas medium called ionized gas, and if the ionized gas is generated by an external electric field and forms a conduction current, the phenomenon is called gas discharge. The discharge mode can be divided into glow discharge, corona discharge, dielectric barrier discharge, radio frequency discharge, microwave discharge, and the like. Glow discharge is usually carried out at low pressure, the required discharge voltage is low, and the energy of electrons is also low; corona discharge can be carried out under normal pressure, but energy is too concentrated, and large-volume plasma is difficult to obtain; the dielectric barrier discharge combines the advantages of the two, and can generate large-area low-temperature plasma under normal pressure; radio frequency discharge and microwave discharge are commonly used for electrodeless discharge, and pure plasma can be obtained.

Mechanism for decomposing gaseous pollutants by low-temperature plasma

The low-temperature plasma contains a plurality of particles with extremely high chemical activity, such as electrons, ions, active groups, excited molecules and the like, so that a plurality of chemical reactions which need high activation energy can occur, and pollutants which are difficult to remove by the conventional method can be converted or decomposed. The chemical purification of low-temperature plasma is to utilize tens of thousands of high-energy electrons to generate inelastic collision with gas molecules (atoms), convert energy into internal energy of ground-state molecules (atoms), and generate a series of processes such as excitation, dissociation and ionization to enable the gas to be in an activated state. When the electron energy is lower (<10eV), active free radicals are generated, and the activated pollutant molecules are removed after the plasma oriented chain chemical reaction. When the average energy of the electrons exceeds the chemical bond binding energy of the contaminant molecules, the molecular bonds are broken and the contaminant is decomposed. In low temperature plasmas, various types of chemical reactions can occur, depending primarily on the average energy of the electrons, electron density, gas temperature, contaminant gas molecular concentration, and co-existing gas composition.

The device adopts the technology of combining low-temperature plasma decomposition and activated carbon adsorption, and the purification principle is as follows:

1. in the discharge process, electrons obtain energy from an electric field, the energy is converted into internal energy or kinetic energy of pollutant molecules through inelastic collision, the molecules obtaining the energy are excited or ionized to form active groups, and when the energy obtained by the pollutant molecules is larger than the binding energy of the molecular bond energy of the pollutant molecules, the molecular bond of the pollutant molecules is broken and directly decomposed into simple substance atoms or the harmless gas molecules are formed by the single atoms.

2. The plasma contains a large amount of energetic electrons, positive and negative ions, excited particles and post-type free radicals with strong oxidizing property, and the active particles are combined with partial exhaust gas molecules in a collision way to simultaneously generate a large amount of OH and HO₂O, and O having extremely strong active radical and oxidizing property₃Can react with harmful gas molecules to generate harmless products.

3. The physical effect is represented by the effect of charge dust collection. A large number of electrons in the plasma are subjected to inelastic collision with particle pollutants and adhere to the surfaces of the particle pollutants so as to charge the particle pollutants, and the particle pollutants are collected by a dust collecting electrode of the low-temperature plasma generator under the action of an electric field.

4. The biological effect is manifested by disinfection and sterilization. The mechanism is as follows: the positive and negative particles in the plasma make the electric energy shearing force generated on the surface of the microorganism larger than the surface tension of the cell membrane, so that the cell membrane is damaged to cause the death of the microorganism. In the discharge process, electrons obtain energy from an electric field, the energy is converted into internal energy or kinetic energy of pollutant molecules through inelastic collision, the molecules obtaining the energy are excited or ionized to form active groups, and meanwhile, oxygen and moisture in the air can also generate a large amount of nascent hydrogen and active groups under the action of high-energy electronsOxygen and hydroxyl oxygen, and the like, which are capable of triggering a complex series of physical and chemical reactions upon mutual collision. From the active group composition of the plasma, the plasma is rich in particles with extremely high chemical activity, such as electrons, ions, free radicals, excited molecules and the like. The pollutants in the exhaust gas react with the active groups with higher energy and are finally converted into CO₂And H₂O and the like, thereby achieving the purpose of purifying the waste gas.

The design of the utility model can effectively solve the problem of difficult waste gas treatment between grids of the sewage treatment station; the device has the advantages of simple structure, high decomposition efficiency, rapid treatment, simple operation, low energy consumption, small occupied area and the like.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A waste gas treatment device between grids of a sewage treatment station is characterized by comprising a machine shell, a wind collecting system, a low-temperature plasma generator and an active carbon adsorption unit, wherein the wind collecting system, the low-temperature plasma generator and the active carbon adsorption unit are fixedly arranged in the machine shell; the wind collecting system is arranged at the bottom of the inner side of the shell; the active carbon adsorption unit is arranged at the top of the inner side of the shell; the low-temperature plasma generator is arranged in the machine shell between the air collecting system and the activated carbon adsorption unit.

2. The waste gas treating apparatus between grids of sewage treating station as claimed in claim 1, wherein an air inlet pipe is connected to the bottom of said cabinet and an air outlet pipe is connected to the top of said cabinet.

3. The waste gas treatment device between grids of the sewage treatment station as claimed in claim 1, wherein the wind collecting system comprises a bracket and a fan; the fan is fixedly arranged on the bracket.

4. The waste gas treatment device between grids of a sewage treatment station as claimed in claim 1, wherein the activated carbon adsorption unit comprises two partition plates and an activated carbon filter element; the activated carbon filter element is arranged between the two partition plates.