Ozone buffer tank device for preventing wastewater from flowing backwards

Abstract

The utility model provides an ozone buffer tank device for preventing wastewater from flowing backwards, which relates to the technical field of wastewater treatment and comprises an ozone buffer tank body, an ozone inlet pipe is arranged at the top of the ozone buffer tank body, and an ozone inlet pipe automatic valve is arranged on the ozone inlet pipe; an ozone outlet pipe is arranged at the upper part of the ozone buffer tank body; an ozone outlet pipe check valve is mounted on the ozone outlet pipe; a liquid level meter is mounted at the lower part of the ozone buffer tank body; the ozone buffer tank body is connected with the ozone generator through an ozone inlet pipe and is connected with the gas-water mixing device through an ozone outlet pipe; the ozone generator, the ozone inlet pipe automatic valve, the emptying valve and the liquid level meter are connected with electrical control equipment; the liquid level meter monitors the liquid level in the ozone buffer tank body, and when the liquid level rises to a set value, the electrical control equipment controls the automatic ozone inlet pipe valve to be closed, and the ozone generator stops. By arranging the liquid level detection instrument, the problems that waste water flows backwards and the ozone generator is damaged due to system faults are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an ozone buffer tank device for preventing wastewater backflow. Background Technique

[0002] At present, environmental protection in China is becoming increasingly strict, and the requirements for sewage treatment, high-salt wastewater treatment, and zero discharge of water treatment are getting higher and higher. The ozone catalytic oxidation process is increasingly used to remove high-content and long-chain COD in wastewater, and has increasingly become a process adopted in water treatment environmental protection projects.

[0003] In the ozone catalytic oxidation process, ozone, a main raw material needed, is easy to decompose and cannot be stored or transported. It must be produced on-site and used immediately. After being produced by equipment such as an ozone generator, ozone is transported through an ozone pipeline to a gas-water mixing device near the ozone catalytic oxidation tank. After being mixed with the wastewater to be treated by the gas-water mixing device, it enters the ozone catalytic oxidation tank. To prevent ozone from escaping, the water inlet pipe is usually arranged below the liquid level. The wastewater of the gas-water mixing device is taken from the tank body by a jet pump and transferred to the gas-water mixing device by the jet pump.

[0004] The existing treatment process has some problems, including: (1) The jet pump runs for 24 hours. Once the jet pump fails, a micro-negative pressure state will be formed in the ozone pipeline, and the wastewater in the ozone catalytic oxidation tank will be sucked into the ozone transmission pipeline and then enter the ozone generator, damaging the ozone generator. The ozone generator equipment is expensive, and once damaged, the loss is serious; (2) Usually, a check valve is installed on the ozone pipeline. However, if the check valve is damaged during operation, the same problems will occur in the whole system, and it is impossible to make a timely judgment and take relevant emergency measures. Content of the Utility Model

[0005] In view of the above problems, the utility model provides an ozone buffer tank device for preventing wastewater backflow. By setting a liquid level detection instrument, the information feedback of wastewater backflow can be obtained in a timely manner, and the automatic valve of the ozone inlet pipe can be closed in a timely manner, avoiding the problem of wastewater backflow caused by system failure and damaging the ozone generator.

[0006] To achieve the above object, the technical solution of the utility model is realized as follows:

[0007] An ozone buffer tank device for preventing wastewater backflow includes: an ozone buffer tank body. An ozone inlet pipe is provided at the top of the ozone buffer tank body, and an automatic valve of the ozone inlet pipe is provided on the ozone inlet pipe; an ozone outlet pipe is provided at the upper part of the ozone buffer tank body, and a check valve of the ozone outlet pipe is installed on the ozone outlet pipe; a liquid level gauge is installed at the lower part of the ozone buffer tank body.

[0008] The ozone buffer tank body is connected to the ozone generator through an ozone inlet pipe and to the air-water mixing device through an ozone outlet pipe; the ozone generator, the automatic valve of the ozone inlet pipe, the evacuation valve, and the liquid level gauge are connected to the electrical control equipment; the liquid level gauge monitors the liquid level in the ozone buffer tank body. When the liquid level rises to the set value, the electrical control equipment controls the automatic valve of the ozone inlet pipe to close and the ozone generator to shut down.

[0009] As a further improvement of the present utility model, a pressure gauge and a safety valve are further provided at the top of the ozone buffer tank body. The safety valve is connected to a safety valve outlet pipe, and the safety valve outlet pipe is connected to the tail gas destroyer at the top of the ozone catalytic oxidation tank.

[0010] Both the pressure gauge and the automatic valve are connected to the electrical control equipment. When the pressure measured by the pressure gauge exceeds the set value, the electrical control equipment controls the safety valve to open, discharging the ozone in the ozone buffer tank body to the tail gas destroyer at the top of the ozone catalytic oxidation tank until the pressure in the ozone buffer tank body returns to the normal level.

[0011] As a further improvement of the present utility model, an evacuation pipe is provided at the bottom of the ozone buffer tank, and an evacuation valve is provided on the evacuation pipe; the evacuation valve is connected to the electrical control equipment, and the electrical control equipment controls the evacuation valve to open to evacuate the wastewater backflow in the ozone buffer tank body.

[0012] As a further improvement of the present utility model, before opening the evacuation valve, the ozone generator is turned off and the automatic valve of the ozone inlet pipe is closed.

[0013] As a further improvement of the present utility model, the liquid level gauge is a static pressure liquid level gauge.

[0014] As a further improvement of the present utility model, the ozone buffer tank is a pressure vessel with a tank volume of 0.5 m 3 , and the design pressure is 0.15 MPa.

[0015] As a further improvement of the present utility model, the automatic valve of the ozone inlet pipe is a pneumatic on-off ball valve.

[0016] As a further improvement of the present utility model, the automatic valve of the ozone inlet pipe is interlocked with the liquid level gauge. When the liquid level in the ozone buffer tank body rises to the set value, the automatic valve of the ozone inlet pipe is closed.

[0017] As a further improvement of the present utility model, the automatic valve of the ozone inlet pipe, the check valve of the ozone outlet pipe, the evacuation valve, and the safety valve are all subjected to rust removal, purging, and degreasing treatments.

[0018] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0019] In the present utility model, an ozone buffer tank device is added between the ozone generator and the air-water mixing device, and a liquid level gauge is arranged on the ozone buffer tank body to obtain the information feedback of wastewater backflow in a timely manner, and the automatic valve of the ozone inlet pipe is closed in a timely manner, so as to avoid the problem that the wastewater backflows to the ozone generator due to system failure and damage the ozone generator.

[0020] In the present utility model, a pressure gauge and a safety valve are arranged on the ozone buffer tank body, so that the pressure in the ozone buffer tank can be controlled, and it can also avoid too much ozone gas in the ozone buffer tank, resulting in excessive pressure and causing problems such as explosion of the ozone buffer tank.

[0021] In the present utility model, an emptying valve is installed at the bottom of the ozone buffer tank. In the case of a failure of wastewater backflow, after the failure is eliminated, the wastewater in the ozone buffer tank can be quickly discharged to realize the operation of the system after rapid maintenance. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of an ozone buffer tank device for preventing wastewater backflow according to an embodiment of the present utility model.

[0023] Description of the Reference Numerals:

[0024] 1. Ozone buffer tank body; 2. Pressure gauge; 3. Ozone inlet pipe; 4. Automatic valve of ozone inlet pipe; 5. Safety valve; 6. Safety valve outlet pipe; 7. Ozone outlet pipe; 8. Check valve of ozone outlet pipe; 9. Liquid level gauge; 10. Emptying pipe; 11. Emptying valve. Detailed Embodiments

[0025] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "plurality" is two or more.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "linkage" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0028] The following further describes the present utility model in detail with reference to the accompanying drawings:

[0029] As Figure 1 shown, an ozone buffer tank device for preventing wastewater backflow provided by the present utility model includes: an ozone buffer tank body 1, an ozone inlet pipe 3 is provided at the top of the ozone buffer tank body 1, and an ozone inlet pipe automatic valve 4 is provided on the ozone inlet pipe 3; an ozone outlet pipe 7 is provided in the upper part of the ozone buffer tank body 1, and an ozone outlet pipe check valve 8 is installed on the ozone outlet pipe 7; a liquid level gauge 9 is installed at the lower part of the ozone buffer tank body 1; a pressure gauge 2 and a safety valve 5 are further provided at the top of the ozone buffer tank body 1, the safety valve 5 is connected to a safety valve outlet pipe 6, and the safety valve outlet pipe 6 is connected to a tail gas destroyer at the top of the ozone catalytic oxidation tank;

[0030] The ozone buffer tank device of the present utility model is applied to an ozone catalytic oxidation system. Among them, the ozone catalytic oxidation system includes an ozone generator, a wastewater tank, and an ozone catalytic oxidation tank. The ozone generator is sequentially connected to an ozone buffer tank and a gas-water mixing device. The wastewater tank is also connected to the gas-water mixing device through a jet pump, and the gas-water mixing device is connected to the ozone catalytic oxidation tank; specifically, the ozone buffer tank body 1 is connected to the ozone generator through the ozone inlet pipe 3 and is connected to the gas-water mixing device through the ozone outlet pipe 7; the ozone generator, the ozone inlet pipe automatic valve 4, the evacuation valve 11, and the liquid level gauge 9 are connected to an electrical control device; an evacuation pipe 10 is provided at the bottom of the ozone buffer tank, and an evacuation valve 11 is provided on the evacuation pipe 10; the evacuation valve 11 is connected to the electrical control device;

[0031] When the ozone catalytic oxidation system operates normally, the ozone generated by the ozone generator is transported out through the ozone pipeline, and successively passes through the ozone inlet pipe 3, the ozone inlet pipe automatic valve 4, the ozone buffer tank, the ozone outlet pipe 7, and the ozone outlet pipe check valve 8 until it reaches the gas-water mixing device and enters the ozone catalytic oxidation tank;

[0032] Under normal operating conditions, the safety valve 5 is closed and the evacuation valve 11 is closed;

[0033] The pressure gauge 2 and the automatic valve are both connected to the electrical control device. When the pressure measured by the pressure gauge 2 exceeds the set value, the electrical control device controls the safety valve 5 to open, and discharges the ozone in the ozone buffer tank body 1 to the tail gas destroyer at the top of the ozone catalytic oxidation tank until the pressure in the ozone buffer tank body 1 returns to the normal level;

[0034] The liquid level gauge 9 monitors the liquid level in the ozone buffer tank body 1. When the wastewater backflows due to a system failure, the liquid level rises. When the liquid level rises to the set value, the electrical control device controls the automatic valve 4 of the ozone inlet pipe to close and the ozone generator to stop;

[0035] With the ozone generator closed and the automatic valve 4 of the ozone inlet pipe in the closed state, the fault is checked manually. After confirming safety, the electrical control device controls the drain valve 11 to open, and drains the backflow wastewater in the ozone buffer tank body 1. After the wastewater is drained, the drain valve 11 is closed.

[0036] After the ozone catalytic oxidation system fault is eliminated and the wastewater is drained, the ozone generator and the automatic valve 4 of the ozone inlet pipe are restarted, and the ozone catalytic oxidation system resumes normal operation.

[0037] In the present utility model, the liquid level gauge 9 is a static pressure liquid level gauge.

[0038] In the present utility model, the ozone buffer tank is a pressure vessel with a tank volume of 0.5 m 3 , and the design pressure is 0.15 MPa.

[0039] In the present utility model, the automatic valve 4 of the ozone inlet pipe is a pneumatic on-off ball valve. The automatic valve 4 of the ozone inlet pipe is interlocked with the liquid level gauge 9. When the liquid level in the ozone buffer tank body 1 rises to the set value, the automatic valve 4 of the ozone inlet pipe is closed. In the present utility model, when the liquid level reaches 100 mm, the ozone inlet automatic valve is closed.

[0040] In the present utility model, the automatic valve 4 of the ozone inlet pipe, the check valve 8 of the ozone outlet pipe, the drain valve 11 and the safety valve 5 are all treated by rust removal, purging and degreasing.

[0041] In the present utility model, the drain valve 11 must be opened only when the entire ozone catalytic oxidation system is shut down. When the operator needs to manually open the drain valve 11, the operator needs to wear protective equipment; if the ozone buffer tank is placed indoors, all doors and windows need to be opened to keep the air circulating.

[0042] Embodiment:

[0043] The present utility model provides an ozone buffer tank device for preventing wastewater backflow, and the usage process is as follows:

[0044] Step 1: Connect the ozone inlet pipe 3 of the ozone buffer tank device to the ozone generator, connect the ozone outlet pipe 7 to the gas-water mixing device, and connect the outlet pipe 6 of the safety valve to the tail gas destroyer on the top of the ozone catalytic oxidation tank;

[0045] Step 2: Close the safety valve 5 and the drain valve 11, and start the entire ozone catalytic oxidation system, including starting the ozone generator;

[0046] Step 3: The ozone produced by the ozone generator is transported through the ozone pipeline, passing through the ozone inlet pipe 3, the automatic valve 4 of the ozone inlet pipe, the ozone buffer tank, the ozone outlet pipe 7, and the check valve 8 of the ozone outlet pipe in sequence, until it reaches the gas-water mixing device and enters the ozone catalytic oxidation tank;

[0047] Step 4: The liquid level gauge 9 monitors the liquid level in the ozone buffer tank body 1. When the liquid level rises to the set value, it is judged that the ozone catalytic oxidation system fails and causes wastewater backflow;

[0048] Step 5: The electrical control equipment controls the automatic valve 4 of the ozone inlet pipe to close and the ozone generator to stop;

[0049] Step 6: Manually check and eliminate the fault;

[0050] Step 7: The electrical control equipment controls the drain valve 11 to open, drain the backflow wastewater in the ozone buffer tank body 1, and close the drain valve 11 after the wastewater is drained;

[0051] Step 8: Restart the ozone generator and the automatic valve 4 of the ozone inlet pipe, and the ozone catalytic oxidation system resumes normal operation.

[0052] Advantages of the present utility model:

[0053] By adding an ozone buffer tank device between the ozone generator and the gas-water mixing device and setting a liquid level gauge on the ozone buffer tank body, the present utility model can obtain the information feedback of wastewater backflow in a timely manner, close the automatic valve of the ozone inlet pipe in a timely manner, and avoid the problem that the wastewater backflows to the ozone generator due to system failure and damages the ozone generator.

[0054] By setting a pressure gauge and a safety valve on the ozone buffer tank body, the present utility model can control the pressure in the ozone buffer tank, and can also avoid too much ozone gas in the ozone buffer tank, resulting in excessive pressure and avoiding problems such as the explosion of the ozone buffer tank.

[0055] By installing a drain valve at the bottom of the ozone buffer tank, in the case of a failure of wastewater backflow, after the fault is eliminated, the wastewater in the ozone buffer tank can be quickly discharged, realizing the operation of the system after rapid maintenance.

[0056] The utility model effectively avoids the problem that the wastewater backflows due to system failures and then damages the ozone generator equipment; the check valve installed at the outlet of the ozone buffer tank plays a dual protection role, further enhancing the stability and safety of the system operation; the ozone buffer tank is equipped with a liquid level monitoring instrument, which can receive the information feedback of wastewater backflow in time and immediately close the automatic valve of the ozone inlet pipe, take relevant measures, and timely check and repair the process system to prevent the further deterioration of system problems; the interlock between the liquid level gauge and the automatic valve of the ozone inlet pipe is set up to realize the interlock control of fault alarm and emergency shutdown, with a high degree of automation and increased convenience of manual operation.

[0057] The above are only the preferred embodiments of the present utility model and do not limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. An ozone buffer tank device for preventing wastewater backflow, characterized in that, Comprising: An ozone buffer tank body, with an ozone inlet pipe provided at the top of the ozone buffer tank body, and an automatic valve for the ozone inlet pipe provided on the ozone inlet pipe; an ozone outlet pipe is provided at the upper part of the ozone buffer tank body, and a check valve for the ozone outlet pipe is installed on the ozone outlet pipe; a liquid level gauge is installed at the lower part of the ozone buffer tank body. The ozone buffer tank body is connected to an ozone generator through the ozone inlet pipe and is connected to a gas-water mixing device through the ozone outlet pipe; the ozone generator, the automatic valve for the ozone inlet pipe, the evacuation valve, and the liquid level gauge are connected to an electrical control device; the liquid level gauge monitors the liquid level in the ozone buffer tank body. When the liquid level rises to a set value, the electrical control device controls the closing of the automatic valve for the ozone inlet pipe and the shutdown of the ozone generator.

2. The ozone buffer tank device for preventing wastewater backflow according to claim 1, wherein: A pressure gauge and a safety valve are further provided at the top of the ozone buffer tank body. The safety valve is connected to a safety valve outlet pipe, and the safety valve outlet pipe is connected to a tail gas destroyer at the top of the ozone catalytic oxidation tank. Both the pressure gauge and the automatic valve are connected to the electrical control device. When the pressure measured by the pressure gauge exceeds the set value, the electrical control device controls the opening of the safety valve to discharge the ozone in the ozone buffer tank body to the tail gas destroyer at the top of the ozone catalytic oxidation tank until the pressure in the ozone buffer tank body returns to the normal level.

3. The ozone buffer tank device for preventing wastewater backflow according to claim 1, characterized in that: An evacuation pipe is provided at the bottom of the ozone buffer tank, and an evacuation valve is provided on the evacuation pipe; the evacuation valve is connected to the electrical control device, and the electrical control device controls the opening of the evacuation valve to evacuate the wastewater backflowed into the ozone buffer tank body.

4. The ozone buffer tank device for preventing wastewater backflow according to claim 3, characterized in that: Before opening the evacuation valve, the ozone generator is turned off and the automatic valve for the ozone inlet pipe is closed.

5. The ozone buffer tank device for preventing wastewater backflow according to claim 1, characterized in that: The liquid level gauge is a static pressure liquid level gauge.

6. The ozone buffer tank device for preventing wastewater backflow according to claim 1, characterized in that: The ozone buffer tank is a pressure vessel with a tank volume of 0.5 m 3 , and the design pressure is 0.15 MPa.

7. The ozone buffer tank device for preventing wastewater backflow according to claim 1, characterized in that: The automatic valve for the ozone inlet pipe is a pneumatic on-off ball valve.

8. The ozone buffer tank device for preventing wastewater backflow according to claim 1, characterized in that: The automatic valve for the ozone inlet pipe is interlocked with the liquid level gauge. When the liquid level in the ozone buffer tank body rises to the set value, the automatic valve for the ozone inlet pipe is closed.

9. The ozone buffer tank device for preventing wastewater backflow according to claim 1, wherein: The automatic valve for the ozone inlet pipe, the check valve for the ozone outlet pipe, the evacuation valve, and the safety valve have all undergone rust removal, purging, and degreasing treatments.

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