Device for preventing gas from escaping in wastewater treatment system
By installing a pressure sensor and a PLC controller at the top of the wastewater treatment tank to adjust the frequency of the tail blower, the problems of gas escape and energy waste in the ozone oxidation process were solved, achieving both safety and energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-21
- Publication Date
- 2026-03-31
AI Technical Summary
In existing technologies, ozone oxidation processes have the problem of gas escape in wastewater treatment systems, and excessive suction of tail blowers leads to energy waste, making it difficult to ensure that ozone and other harmful gases do not escape at low suction volumes.
A pressure sensor is installed at the top of the wastewater treatment tank. Combined with a PLC controller, the operating frequency of the tail gas breaker is adjusted. The pressure sensor monitors the pressure inside the tank and feeds back the signal to the PLC controller, which controls the variable frequency operation of the tail gas breaker to ensure a slightly negative pressure state inside the wastewater treatment tank. Combined with the gas-liquid separation and tail gas treatment unit, the gas is effectively treated.
This achieves the goal of reducing tail blower energy consumption, preventing gas leakage, extending equipment life, and reducing energy consumption while ensuring safety.
Smart Images
Figure CN224062553U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to sludge treatment technical field, especially in the wastewater treatment system of preventing gas dispersion device. BACKGROUND
[0002] In the wastewater treatment process, often use ozone oxidation process, including ozone contact oxidation, ozone advanced oxidation, ozone catalytic oxidation and related ozone oxidation technology. And adopt related ozone oxidation technology, will inevitably involve the problem of preventing the dispersion and treatment of ozone-containing tail gas.
[0003] The Ministry of Health stipulates that the safety concentration of ozone in industrial environment is ≤0.2mg / m³ (0.1ppm), and the ozone concentration that can be smelled by human beings is generally 0.04mg / m³ (0.02ppm). In order to ensure that there is no leakage site around the related water pool and water tank, the supporting tail broken fan is generally about 3 times the air intake of the ozone generator.
[0004] Although the method of excessive suction effectively avoids the risk of ozone and other harmful gas leakage, but excessive suction will lead to energy waste of gas heating part in tail broken fan and subsequent high-temperature catalytic destruction system. Therefore, how to ensure that ozone and other harmful gases do not disperse under the condition of as low as possible tail broken fan suction is the key problem. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a kind of in wastewater treatment system of preventing gas dispersion device, solve the gas dispersion problem in wastewater treatment system in prior art, on the basis of guaranteeing tail gas discharge qualified standard, realize energy saving and consumption reduction.
[0006] To achieve the above object, the utility model adopts the technical scheme that:
[0007] The utility model provides a kind of in wastewater treatment system of preventing gas dispersion device, comprising:
[0008] Air pressure sensor, the air pressure sensor is arranged at wastewater treatment pool top, for monitoring the air pressure size in wastewater treatment pool;
[0009] PLC controller, the PLC controller includes judging unit, signal receiving unit and signal sending unit;The signal receiving unit is used to receive the pressure signal monitored by the air pressure sensor, the judging unit is used to compare and judge the pressure signal received by the signal receiving unit with the size of wastewater treatment pool external environment pressure;The signal sending unit is used to send frequency conversion signal to controlled end according to the judging result of the judging unit;
[0010] A tail breaking fan is connected to the wastewater treatment tank at one end and connected to the tail gas treatment unit at the other end, and the tail breaking fan is electrically connected to the signal sending unit to receive the variable frequency signal sent by the signal sending unit.
[0011] Further, a gas-water separation tank is arranged between the wastewater treatment tank and the tail breaking fan to separate water vapor from the tail gas sucked into the gas-water separation tank by the tail breaking fan.
[0012] Further, a drain valve is arranged at the bottom of the gas-water separation tank.
[0013] Further, the tail gas treatment unit comprises a heating unit and a catalytic destruction unit to heat and catalytically decompose the tail gas after water vapor separation.
[0014] Further, a breather valve is arranged at the top of the wastewater treatment tank to assist in adjusting the amount of gas in the wastewater treatment tank.
[0015] Further, the tail breaking fan comprises a tail breaking fan body and a variable frequency motor, and the signal sending unit is connected to the variable frequency motor.
[0016] Thanks to the above technical solution, the present application has the following advantages compared with the prior art:
[0017] The gas pressure sensor is arranged at the top of the wastewater treatment tank, the pressure in the tank is monitored by the gas pressure sensor, and the signal is fed back to the PLC controller. BRIEF DESCRIPTION OF DRAWINGS
[0018] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings in an exemplary and non-limiting manner.
[0019] Figure 1 is an application scenario one of the gas escape prevention device for the wastewater treatment system provided by the present application;
[0020] Figure 2 is an application scenario two of the gas escape prevention device for the wastewater treatment system provided by the present application;
[0021] Figure 3 is the application scene three of the gas dissipation prevention device in the wastewater treatment system provided by the utility model;
[0022] Among them, the sign explanation is as follows:
[0023] 1, air pressure sensor; 2, PLC controller; 3, tail breaking fan; 301, tail breaking fan body; 302, frequency conversion motor; 4, tail gas treatment unit; 5, gas-water separation tank; 501, drain valve; 6, breather valve; 7, wastewater treatment tank; 8, ozone dosing device; 9, aeration assembly; 10, catalytic filler layer. DETAILED DESCRIPTION
[0024] The technical scheme of the utility model will be described clearly and completely in combination with the drawings, obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.
[0025] The gas dissipation prevention device in the wastewater treatment system in the utility model includes air pressure sensor 1, PLC controller 2, tail breaking fan 3, tail gas treatment unit 4, gas-water separation tank 5 and breather valve 6.
[0026] Air pressure sensor 1 is arranged at the top of wastewater treatment tank 7 and is used for monitoring the pressure size in wastewater treatment tank 7 in real time. Air pressure sensor 1 is connected with PLC controller 2 signal synchronously, and the monitored pressure signal is transmitted to PLC controller 2.
[0027] Specifically, PLC controller 2 includes judging unit 201, signal receiving unit 202 and signal sending unit 203; signal receiving unit 202 is used for receiving the pressure signal monitored by air pressure sensor 1, and judging unit 201 is used for comparing and judging the pressure signal received by signal receiving unit 202 with the environmental pressure size outside wastewater treatment tank 7; signal sending unit 203 is used for sending frequency conversion signal to the controlled end, i.e. tail breaking fan 3, according to the judging result of judging unit 201.
[0028] Tail breaking fan 3 is connected with wastewater treatment tank 7 at one end and tail gas treatment unit 4 at the other end, and gas-water separation tank 5 is further arranged between wastewater treatment tank 7 and tail gas treatment unit 4. Tail breaking fan 3 is used for sucking the tail gas in wastewater treatment tank 7 to gas-water separation tank 5 for water vapor separation, and then conveying to tail gas treatment unit 4 for tail gas treatment, aiming at ensuring that the tail gas reaches the discharge standard and avoiding harmful gas leakage to the external environment.
[0029] The bottom of the gas-water separation tank 5 is provided with a drain valve 501, and when the moisture in the gas-water separation tank 5 accumulates to a certain degree, the accumulated water can be drained by opening the drain valve 501 at the bottom.
[0030] The tail gas treatment unit 4 includes a heating unit and a catalytic destruction unit. By arranging the heating unit and the catalytic destruction unit, the ozone and harmful gases sucked into the tail gas treatment unit 4 are heated and catalytically decomposed before being discharged, so as to protect the environment and safety.
[0031] Similarly, the tail gas fan 3 is electrically connected with the PLC controller 2. Specifically, the tail gas fan 3 includes a tail gas fan body 301 and a variable frequency motor 302, and the variable frequency motor 302 is connected with the signal sending unit 203 in the PLC controller 2, that is, the PLC controller 2 can control the running frequency of the tail gas fan body 301 by controlling the variable frequency motor 302.
[0032] In addition, the bottom of the wastewater treatment tank 7 is also provided with a breather valve 6, and through the breather valve 6, the wastewater treatment tank 7 can be quickly aerated or aerated in special circumstances (such as power failure / other emergency situations), effectively ensuring the safety of the air pressure inside and outside the tank.
[0033] The following three specific examples are further described, and the following examples are all treated with ozone oxidation process.
[0034] Example 1
[0035] Referring to Figure 1 , this embodiment provides a scene one for the application of the gas escape prevention device in the wastewater treatment system.
[0036] Specifically, ozone and wastewater to be treated are first introduced into the ozone feeding device 8 for mixing to obtain ozone-containing wastewater to be treated. Then the ozone-containing wastewater to be treated is introduced into the wastewater treatment tank 7 for oxidation reaction. The wastewater treatment tank 7 in this embodiment is an integrated reaction tank and degassing tank.
[0037] After a period of reaction, the air pressure in the tank is monitored by the air pressure sensor 1 at the top of the tank, and the air pressure information is transmitted to the PLC controller 2 at the same time. The PLC controller 2 compares the ambient atmospheric pressure with the received air pressure.
[0038] When the monitored real-time air pressure is higher than the ambient atmospheric pressure, it means that the gas pressure in the tank is too high, and the amount of ozone and harmful gases is too much. The PLC controller 2 will send a control signal to the variable frequency motor 302 of the tail gas fan 3 to increase the running frequency of the tail gas fan body 301, that is, the suction frequency, and speed up the suction of the gas in the tank, so as to ensure that the air pressure in the tank is maintained in a negative pressure state.
[0039] If the real-time air pressure is lower than the ambient atmospheric pressure, it means that the amount of ozone and harmful gases in the pool is too small, and the PLC controller 2 will send a control signal to the frequency conversion motor 302 of the tail breaking fan 3 to reduce the running frequency of the tail breaking fan body 301, that is, the suction frequency, so as to slow down the suction of the gas in the pool and avoid the excessive pressure difference between the inside and outside of the pool body caused by too fast suction.
[0040] In the real-time control of the suction frequency of the tail breaking fan 3, the generated gas in the wastewater treatment pool 7 is then sucked into the gas-water separation tank 5 for water vapor separation. Too much water vapor entering the tail breaking treatment unit can cause the tail breaking catalyst filler to fail, reducing the service life of the tail breaking filler. By separating the water in the gas-water separation tank 5, the risk can be reduced.
[0041] In addition, the water in the generated gas may also have a corrosion reaction with the metal parts inside the equipment. After removing the water, the corrosion degree of the equipment can be reduced, and the service life of the equipment can be prolonged.
[0042] After water vapor separation, the tail breaking fan 3 continues to suck the gas into the tail gas treatment unit 4 for heating and catalytic decomposition, dissociates the harmful substances in the gas, and then discharges to the external environment. The treated wastewater is directly discharged from the wastewater treatment pool 7.
[0043] In addition, in order to avoid special cases, the breathing valve 6 is arranged at the top of the wastewater treatment pool 7, which can exhaust or supplement air into the pool in special cases, effectively ensuring the safety of the air pressure inside and outside the pool.
[0044] Embodiment 2
[0045] Referring to Figure 2 The embodiment provides a second application scenario of the gas escape prevention device for the wastewater treatment system.
[0046] In this application scenario, the difference from embodiment 1 is that the wastewater to be treated is directly introduced from the top of the wastewater treatment pool 7, and the ozone is directly introduced from the bottom of the wastewater treatment pool 7, without the need to be mixed in the ozone adding device 8 first. And the wastewater treatment pool 7 in this embodiment is composed of a reaction pool and a degassing pool connected at the bottom.
[0047] When the ozone is introduced into the wastewater treatment pool 7, the ozone is added by means of the aeration assembly 9, so that the ozone can be divided into small bubbles, greatly increasing the contact area between the ozone and the wastewater. This is conducive to the transfer of ozone from the gas phase to the liquid phase, and improves the solubility of ozone in wastewater.
[0048] And, the aeration assembly 9 can uniformly distribute ozone in the entire wastewater treatment tank 7, avoid local ozone concentration too high or too low, and ensure that the pollutants in the wastewater can fully contact the ozone. The turbulence and the rising movement of the bubbles generated by the aeration assembly 9 can effectively promote the mass transfer process of ozone from the bubble interface to the wastewater body, improve the mass transfer efficiency, and enable more ozone to participate in the oxidation reaction.
[0049] Embodiment 3
[0050] Referring to Figure 3 The embodiment provides a third application scenario of the gas escape prevention device for a wastewater treatment system.
[0051] In the application scenario, the difference from the first embodiment is that the wastewater to be treated and the ozone are directly introduced from the bottom of the wastewater treatment tank 7, are adsorbed and treated by the catalytic filler layer 10 in the tank, and then enter downstream equipment. The catalytic filler layer 10 can increase the surface area of the oxidation reaction between the ozone and the wastewater, provide more sites for the reaction between the ozone and the wastewater, and improve the reaction rate.
[0052] To sum up, the gas escape prevention device for a wastewater treatment system disclosed in the utility model has the advantages that the gas pressure sensor 1 is arranged at the top of the wastewater treatment tank 7, the pressure in the tank is monitored according to the gas pressure sensor 1, and a signal is fed back to the PLC controller 2. The PLC controller 2 adjusts the running frequency of the tail breaking fan 3 according to the pressure signal of the gas pressure sensor 1, so that the tail breaking fan 3 is always at a suitable running frequency, the wastewater treatment tank 7 is always in a micro-negative pressure state, the safety of the wastewater treatment tank 7 and the surrounding environment is ensured, the purpose of saving energy and reducing consumption is achieved, the energy consumption of the tail breaking fan 3 is reduced, the gas treatment amount of the tail gas treatment unit 4 is also reduced, and the energy consumption of the tail gas treatment unit 4 is further reduced.
[0053] The above embodiments are only for describing the technical concept and characteristics of the utility model, the purpose is to enable people skilled in the art to understand the content of the utility model and implement the utility model, and the protection scope of the utility model cannot be limited, equivalent changes or modifications made according to the spirit and essence of the utility model should be covered in the protection scope of the utility model.
Claims
1. A gas escape preventing device for a wastewater treatment system, characterized by, The utility model relates to a kind of tail broken fan and tail gas treatment unit, including: Air pressure sensor (1), the air pressure sensor (1) is arranged at wastewater treatment tank top, for monitoring the air pressure size in wastewater treatment tank; PLC controller (2), the PLC controller (2) includes judging unit (201), signal receiving unit (202) and signal sending unit (203);The signal receiving unit (202) is used to receive the pressure signal monitored by the air pressure sensor (1), the judging unit (201) is used to compare and judge the pressure signal received by the signal receiving unit (202) with the size of the pressure of wastewater treatment tank outside environment;The signal sending unit (203) is used to send frequency conversion signal to controlled end according to the judging result of the judging unit (201); Tail broken fan (3), one end of the tail broken fan (3) is connected with wastewater treatment tank, the other end of the tail broken fan (3) is connected with tail gas treatment unit (4);And the tail broken fan (3) is electrically connected with the signal sending unit (203), receives the frequency conversion signal sent by the signal sending unit (203).
2. A device for preventing gas emission in a wastewater treatment system according to claim 1, wherein It also includes gas-water separation tank (5), the gas-water separation tank (5) is arranged between wastewater treatment tank and the tail broken fan (3), for carrying out water vapor separation to tail gas that is pumped into the gas-water separation tank (5) by the tail broken fan (3).
3. A device for preventing gas emission in a wastewater treatment system according to claim 2, wherein The bottom of the gas-water separation tank (5) is provided with drain valve (501).
4. A device for preventing gas emission in a wastewater treatment system according to claim 2, wherein The tail gas treatment unit (4) includes heating unit and catalytic destruction unit, for carrying out heating catalytic decomposition to tail gas after water vapor separation.
5. A device for preventing gas emission in a wastewater treatment system according to claim 1, wherein It also includes breather valve (6), the breather valve (6) is arranged at wastewater treatment tank top, and the breather valve (6) is used to assist adjusting the size of gas in wastewater treatment tank.
6. A device for preventing gas emission in a wastewater treatment system according to claim 1, wherein The tail broken fan (3) includes tail broken fan body (301) and variable frequency motor (302), and the signal sending unit (203) is connected with the variable frequency motor (302).