CN212954513U

CN212954513U - Device for measuring oxygen consumption of aeration tank of sewage plant

Info

Publication number: CN212954513U
Application number: CN202020703009.XU
Authority: CN
Inventors: 苏炜; 陈好学; 臧宾帮; 宗耀
Original assignee: Shandong Broadcontrol Electromechanical Co ltd
Current assignee: Shandong Broadcontrol Electromechanical Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-04-13
Anticipated expiration: 2030-04-30

Abstract

The invention discloses a device for measuring oxygen consumption of an aeration tank of a sewage plant, which comprises a gas collecting hood, wherein a gas guide pipe is fixed above the gas collecting hood, an oxygen content probe II is arranged in the gas guide pipe, and the oxygen content probe II is connected with an instrument box through a sensor cable; the oxygen content probe I is arranged on the pond bank and is connected with the instrument box through a sensor cable; the aeration head is positioned at the bottom of the water tank. The invention has simple structure and accurate data.

Description

Device for measuring oxygen consumption of aeration tank of sewage plant

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a device for measuring oxygen consumption of an aeration tank of a sewage plant.

Background

The aerobic section of a sewage treatment plant is an important working section in the sewage treatment process, the oxygen consumption index of water has great guiding significance for the sewage treatment effect, the energy conservation and consumption reduction of the sewage treatment plant, the completeness rate of an aeration membrane and the like, at present, although instruments such as a dissolved oxygen tester and the like can roughly calculate the oxygen consumption and control the aeration quantity, the water quantity and the like according to the oxygen consumption index, the conditions of large measurement error, poor real-time performance and the like often occur due to the influence of factors such as the measurement principle of the dissolved oxygen tester, the use environment and the like. At present, no effective device for measuring the actual oxygen consumption in the aerobic tank exists, so that no sewage treatment process control scheme based on the index exists at present.

The existing oxygen concentration measurement sensor technology is very stable and reliable, so that the actual oxygen consumption of a water body can be relatively accurately detected in real time, a set of brand-new technical route for sewage treatment control can be developed based on the technology, and the device can be analyzed through big data after being applied in a large quantity, so that the process design of a sewage treatment plant is more direct, and the device has great significance for the complete upgrading of a control system in the whole sewage treatment industry.

The device can also be made into handheld or mobile equipment, oxygen consumption at different positions in the aeration tank is measured, so that oxygen consumption in different areas is obtained, and a basis or the damage condition of the membrane can be provided for the arrangement scheme of the aeration head.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a device for measuring the oxygen consumption of an aeration tank of a sewage plant.

The invention is realized by the following technical scheme:

the utility model provides a device for measuring sewage plant aeration tank oxygen consumption, its characterized in that: the gas collection device comprises a gas collection hood, wherein a gas guide tube is fixed above the gas collection hood, an oxygen content probe II is arranged inside the gas guide tube, and the oxygen content probe II is connected with an instrument box through a sensor cable; the oxygen content probe I is arranged on the pond bank and is connected with the instrument box through a sensor cable; the aeration head is positioned at the bottom of the water tank.

Preferably, the air duct is fixed on the pool wall through a fixing bracket, and the fixing bracket is connected with the air duct through a fixing nut.

Preferably, a windshield is fixed at the top of the air duct, and a sensor fixing seat is fixed above the windshield.

Preferably, the sensor fixing seat is provided with a wire outlet hole, and the sensor cable passes through the wire outlet hole.

Preferably, an anti-foaming net is arranged in the air duct, and the anti-foaming net is positioned below the oxygen content probe II.

The invention has the beneficial effects that: the invention adopts an oxygen content probe arranged in a buoy or a fixed cover to collect the oxygen content in the aerated bubbles in the aeration tank, and compares the oxygen content with the oxygen content at the inlet of the air blower to obtain the oxygen content difference, and the product of the difference and the air flow at the outlet of the air blower is the oxygen consumption value of the aeration tank.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of the present invention.

In the attached drawing, 1 is an instrument box 2, an oxygen content probe I3, a sensor cable 4, a fixed support 5, a cell body 6, air bubbles 7, an air guide pipe 8, a fixed nut 9, a sensor fixed seat 10, a wind shield 11, an oxygen content probe II 12, a foam prevention net 13, a gas collection cover 14, an air flow direction 15 and an aeration head.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

For ease of description, spatially relative terms, such as "upper," "lower," "left," "right," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatial terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" other elements or features would then be oriented "above" the other elements or features. Thus, the exemplary term "lower" can encompass both an upper and a lower orientation.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

With reference to fig. 1, the apparatus for measuring oxygen consumption of an aeration tank of a sewage plant according to the present embodiment includes a gas-collecting hood, an air duct is fixed above the gas-collecting hood, an oxygen content probe II is disposed inside the air duct, and the oxygen content probe II is connected to an instrument box through a sensor cable; the oxygen content probe I is arranged on the pond bank and is connected with the instrument box through a sensor cable; the aeration head is positioned at the bottom of the water tank.

In this embodiment, the air duct is fixed on the pool wall through a fixing bracket, and the fixing bracket is connected with the air duct through a fixing nut. The top of the air duct is fixed with a windshield, and a sensor fixing seat is fixed above the windshield. The sensor fixing seat is provided with a wire outlet hole, and the sensor cable penetrates through the wire outlet hole. And an anti-foaming net is arranged in the air duct and is positioned below the oxygen content probe II.

As shown in figure 1, the integral structure is a cover which is buckled on the water surface of the aeration tank. The oxygen content probe 2 is fixedly arranged in an air duct at the upper part of the gas-collecting hood, and the top of the air duct is provided with a wind-proof hood. The bubbles coming out of the aeration tank are collected by the gas collecting hood after being broken, rise along the air guide pipe and are discharged through the wind preventing hood, so that the gas components in the air guide pipe are consistent with the components in the bubbles. The oxygen content probe 2 can measure the oxygen concentration in the gas guide tube in real time, and the difference value between the measured value and the oxygen concentration measured by the oxygen content probe 1 after the measured value is processed by an instrument is the oxygen consumption rate.

The product of the oxygen consumption rate and the flow meter at the outlet of the blower is the oxygen consumption of the water body, and can be used as an important index parameter in a sewage treatment process flow to control the equipment operation of a water plant.

Since the oxygen content of the air in most places is stable, the measured value of the oxygen content probe 1 can be set into the instrument parameter in a fixed value.

The meter head is provided with 2 sensor interfaces, which respectively measure two paths of oxygen concentration values, and the two paths of oxygen concentration values are displayed on a screen or output from a terminal by standard signals after automatic operation, and can be accessed to other meters or equipment such as a PLC of an automatic control system.

Fig. 1 illustrates a fixed installation structure, the gas collecting hood can be made into a floating type, the instrument can be made into a handheld type, etc., the gas collecting hood can be movably measured at different positions in a pool, the oxygen consumption rate at different positions can approximately reflect the normal aeration rate at different positions, and the gas collecting hood can be used as the basis for maintenance of aeration equipment.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims

1. The utility model provides a device for measuring sewage plant aeration tank oxygen consumption, its characterized in that: the gas collection device comprises a gas collection hood, wherein a gas guide tube is fixed above the gas collection hood, an oxygen content probe II is arranged inside the gas guide tube, and the oxygen content probe II is connected with an instrument box through a sensor cable; the oxygen content probe I is arranged on the pond bank and is connected with the instrument box through a sensor cable; the aeration head is positioned at the bottom of the water tank.

2. The apparatus of claim 1, further comprising: the air guide pipe is fixed on the pool wall through a fixing bracket, and the fixing bracket is connected with the air guide pipe through a fixing nut.

3. The apparatus of claim 1, further comprising: the top of the air duct is fixed with a windshield, and a sensor fixing seat is fixed above the windshield.

4. The apparatus of claim 3, wherein the apparatus is configured to measure oxygen consumption of the aeration basin of the wastewater treatment plant: the sensor fixing seat is provided with a wire outlet hole, and the sensor cable penetrates through the wire outlet hole.

5. The apparatus of claim 1, further comprising: and an anti-foaming net is arranged in the air duct and is positioned below the oxygen content probe II.