Portable oxygen mass transfer efficiency measuring system and method

Abstract

The invention discloses a portable oxygen mass transfer efficiency measuring system which comprises a gas collecting hood connected with a gas monitoring module; the rod body is connected with the gas collecting hood and is arranged at the lower part of the rod body; the gas collecting hood comprises a supporting rod, a connecting rod hinged to the supporting rod and a cloth piece arranged outside the supporting rod, the upper end of the supporting rod is hinged to the sliding sleeve, the rod body slides along the sliding sleeve, and one end of the connecting rod is installed on the rod body in a hinged mode. A reset spring is arranged between the rod body and the sliding sleeve. A balancing weight is arranged on the rod body in a sliding mode, and the sliding sleeve moves downwards through sliding of the balancing weight. And a limiting frame is arranged on the rod body. A connecting part is arranged on the rod body and is used for assembling a plurality of rod bodies. The rod body is of a telescopic rod structure. The problems that an existing test point is small in size, and gas collection is inconvenient are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas measurement, and in particular to a portable oxygen mass transfer efficiency measurement system and method. Background Art

[0002] The aeration system is the main energy-consuming unit in the sewage treatment process, accounting for 45%-75% of the total energy consumption of the entire sewage treatment plant. With the continuous improvement of water treatment requirements, the high energy consumption of the aeration system in the sewage treatment process has become a key issue that needs to be solved urgently in the sewage treatment industry to save energy and reduce consumption. To achieve efficient operation of the aeration equipment, it is necessary to clarify the oxygen supply performance of the actual working conditions. The tail gas test method is a common method for field determination of the oxygen mass transfer performance of the aeration system.

[0003] The primary task of the tail gas test method for oxygen mass transfer efficiency determination is to collect the tail gas from the aerobic pool within the test point range, so it is necessary to expand the tail gas receiving area of the gas collection device as much as possible. The larger the gas collection area, the more the oxygen mass transfer efficiency data of the test can reflect the actual working conditions. Recently, sewage treatment plants across the country have installed covers on biological pools to prevent the escape of harmful gases generated during sewage treatment. In the field test of oxygen mass transfer efficiency, the installation of the cover affected the on-site experimental test of the oxygen mass transfer efficiency determination system. Summary of the invention

[0004] The purpose of the present invention is to provide a portable oxygen mass transfer efficiency measurement system to solve the above problems, so as to solve the problems that the existing test points are small in size and gas collection is inconvenient.

[0005] To achieve the above object, the present invention provides the following technical solution: a portable oxygen mass transfer efficiency measurement system, comprising:

[0006] A gas collecting hood, wherein the gas collecting hood is connected to a gas monitoring module;

[0007] The rod body is connected to the gas collecting cover and is arranged at the lower part of the rod body;

[0008] The air collecting hood includes a support rod, a connecting rod hinged to the support rod and a cloth sheet arranged outside the support rod. The upper end of the support rod is hinged to the sliding sleeve, the rod body slides along the sliding sleeve, and one end of the connecting rod is hingedly installed on the rod body.

[0009] Preferably, a return spring is provided between the rod body and the sliding sleeve.

[0010] Preferably, a counterweight block is slidably provided on the rod body, and the sliding sleeve moves downward through the sliding of the counterweight block.

[0011] Preferably, a limiting frame is provided on the rod body.

[0012] Preferably, a connecting portion is provided on the rod body for assembling multiple rod bodies.

[0013] Preferably, the rod body is a telescopic rod structure.

[0014] Preferably, the rod body is a hollow structure, and one side of the rod body is connected to an air suction pipe.

[0015] Preferably, a plurality of air holes are provided at the lower end of the rod body.

[0016] The present invention also discloses a method for measuring oxygen mass transfer efficiency, using the above portable oxygen mass transfer efficiency measurement system, including:

[0017] Determine the test depth and adjust the rod body to an appropriate length;

[0018] Lower the gas collection hood into the test point;

[0019] Control the sliding sleeve to move downward, so that the support rod moves, and then the gas collection hood unfolds;

[0020] Pass the gas in the gas collection hood into the gas monitoring module to measure the oxygen mass transfer efficiency.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0022] The unique gas collection hood structure and spring counterweight system of the present invention can ensure the collection of uniform and stable tail gas samples under complex water flow conditions. The traditional device often has sampling fluctuations under the impact of water flow, while this device greatly improves the stability of tail gas collection through the specially designed umbrella-shaped gas collection hood structure, making the measured oxygen mass transfer efficiency data more accurate and reliable, and avoiding the measurement errors caused by unstable tail gas in the traditional device. It can be combined into a suitable length according to actual needs to adapt to biological ponds of different depths. Greatly improves the adaptability and versatility of the measurement system.

[0023] The present device has breakthroughly solved the problem of gas collection in the microenvironment of covered sewage treatment plants. Through the precisely controlled negative pressure system and the professionally designed gas collection hood, it can truly reflect the oxygen mass transfer efficiency under the working conditions without disturbing the normal gas release on the water surface, and avoids the problems of gas sample pollution or disturbance that may be caused by conventional devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0026] The description of the reference numerals is as follows: 1. air collecting hood; 11. support rod; 12. connecting rod; 13. sliding sleeve; 2. rod body; 3. return spring; 4. counterweight; 5. limiting frame; 6. connecting part. Specific Embodiment

[0027] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other implementation manners obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope protected by the present invention.

[0028] As Figure 1 shown, the portable oxygen mass transfer efficiency measurement system of this embodiment includes:

[0029] An air collecting hood 1, which is connected with a gas monitoring module;

[0030] A rod body 2, which is connected to the air collecting hood 1 and is arranged at the lower part of the rod body 2;

[0031] The air collecting hood 1 includes a support rod 11, a connecting rod 12 hinged to the support rod 11, and a cloth piece arranged outside the support rod 11. The upper end of the support rod 11 is hinged on the sliding sleeve 13, the rod body 2 slides along the sliding sleeve 13, and one end of the connecting rod 12 is hinged and installed on the rod body 2.

[0032] In this embodiment, by adjusting the position of the sliding sleeve 13, the connecting rod 12 moves and then drives the support rod 11 to move, so as to realize the unfolding of the air collecting hood 1 and provide a collecting hood for gas collection. The length of the sliding sleeve 13 can be set by itself for the convenience of operating the sliding sleeve 13.

[0033] In another embodiment, a return spring 3 is arranged between the rod body 2 and the sliding sleeve 13. By arranging the spring 3, when the sliding sleeve 13 is not affected by an external force, it will be subject to the restoring force of the return spring 3, causing the sliding sleeve 13 to move upward and the air collecting hood 1 to automatically fold. In another embodiment, the partial contact position between the sliding sleeve 13 and the rod body 2 is in a threaded fit. By rotating, the threaded fit position is changed, and then the unfolding and folding of the air collecting hood 1 are realized.

[0034] In one embodiment, a counterweight 4 is slidably arranged on the rod body 2, and the sliding sleeve 13 moves downward by the sliding of the counterweight 4. Selecting a counterweight 4 with an appropriate weight to drive the sliding sleeve 13 downward can reduce the length of the sliding sleeve 13 and eliminate the need for manual operation.

[0035] In one embodiment, a limiting frame 5 is provided on the rod body 2. The limiting frame 5 is a cross or a single-bar frame. The rod body 2 is limited at the test point by adjusting the position of the limiting frame 5 on the rod body 2. The fixing method of the limiting frame 5 and the rod body 2 adopts a screw locking method.

[0036] In one embodiment, a connecting portion 6 is provided on the rod body 2 for assembling multiple rod bodies 2. Since the length of the rod body 2 is limited, multiple rod bodies 2 are combined to increase the length. The connecting portion 6 and the rod body 2 can adopt a threaded fit.

[0037] In another embodiment, the rod body 2 is of a telescopic rod structure. The telescopic rod structure can improve the portability performance. The telescopic structure can be a common telescopic structure, as long as it satisfies the functions of elongation, locking, and retraction.

[0038] In one embodiment, the rod body 2 is of a hollow structure, and one side of the rod body 2 is connected to an air suction pipe. The gas in the gas collection hood 1 is discharged to the gas monitoring module through the inside of the rod body 2 via the air suction pipe to realize the determination of the oxygen mass transfer efficiency.

[0039] In another embodiment, a plurality of air holes are provided at the lower end of the rod body 2. The air intake effect is not good for a single inlet. The method of opening a plurality of air holes on the side surface of the rod body 2 is adopted, or a spherical structure is adopted, and a plurality of air holes are opened in the spherical structure, or a funnel structure is combined with the air holes to centrally collect the gas.

[0040] This embodiment also discloses a method for determining the oxygen mass transfer efficiency, using a portable oxygen mass transfer efficiency determination system, including:

[0041] Determine the test depth and adjust the rod body 2 to an appropriate length;

[0042] Lower the gas collection hood 1 into the test point;

[0043] Control the sliding sleeve 13 to move downward, so that the support rod 11 moves, and then the gas collection hood 1 is unfolded;

[0044] Introduce the gas in the gas collection hood 1 into the gas monitoring module to perform the determination of the oxygen mass transfer efficiency.

[0045] When it is first used, the rod body 2 has no counterweight 4, and the waterproof cloth of the gas collecting hood 1 is in a retracted state. In the retracted state, the device is small in size and can be placed in the narrow gap behind the cover plate of the sewage treatment plant (that is, the test point mentioned above). This structural feature is easy to meet the actual situation of more sewage treatment plants to measure the oxygen mass transfer efficiency, and it is more widely applicable. When the gas collecting hood 1 is put into the hole, the counterweight 4 is added to the rod body 2. The counterweight 4 drives the sliding sleeve 13 to slide downward due to gravity, compresses the reset spring 3, and drives the support rod 11 to move, thereby achieving the purpose of opening the umbrella, which is conducive to the efficient collection of exhaust gas. Different from the prior art that requires complex manual operations or bulky mechanical devices, the present invention adopts an innovative counterweight iron and spring linkage expansion mechanism to realize the intelligent expansion and storage of the gas collecting hood. This design enables the device to be flexibly operated in a small space, while ensuring the maximization of the gas collection area, solving the dilemma that traditional fixed gas collecting devices cannot be used in covered sewage treatment plants.

[0046] The original gas collecting hood structure and spring counterweight system of the present invention can ensure that uniform and stable tail gas samples are collected under complex water flow conditions. Traditional devices often experience sampling fluctuations under the impact of water flow, while the present device greatly improves the stability of tail gas collection through a specially designed umbrella-shaped gas collecting hood structure, making the measured oxygen mass transfer efficiency data more accurate and reliable, and avoiding the measurement errors caused by tail gas instability in traditional devices. In view of the differences in actual operating conditions of different sewage treatment plants, the present invention provides multi-specification counterweight irons and adjustable connecting rod systems, so that the device can be flexibly adjusted according to the pool depth, water flow intensity and cover opening size. Each connecting rod is 250mm long and can be combined into a suitable length according to actual needs to adapt to biological pools of different depths. This high degree of customizability is not available in traditional fixed-specification devices, which greatly improves the adaptability and versatility of the measurement system.

[0047] This device has breakthroughly solved the problem of gas collection in the microenvironment of covered sewage treatment plants. Through a precisely controlled negative pressure system and a professionally designed gas collection hood, it can truly reflect the oxygen mass transfer efficiency under actual working conditions without disturbing the normal gas release on the water surface, avoiding the problems of gas sample contamination or disturbance that may be caused by conventional devices. The materials used in this device are considered in light of the actual engineering of sewage treatment plants and are matched with them. The cloth pieces of the gas collection hood are made of special materials to achieve waterproof sealing. To avoid the water flow impact on the pool surface of the sewage treatment plant, the umbrella handle of the gas collection hood has a certain weight and is not easily moved with the change of water flow impact. In the fixed support component part, the counterweight iron has various specifications of size and thickness, which can be replaced according to the actual on-site engineering. The ground part of this device is designed with a movable fixed limit frame part, which is sleeved on the rod body. This design facilitates the fixed operation of experimental testers on the ground. To sum up, this portable tail gas collection device has breakthroughly solved the technical problem of measuring the oxygen mass transfer efficiency of modern covered sewage treatment plants, can be flexibly adjusted and set according to the actual situation of oxygen mass transfer testing in the target sewage treatment plant, and has extremely high practical value and broad application prospects.

[0048] As can be seen from the above, during actual use, an external oxygen mass transfer efficiency measurement device is connected to one end of the suction pipe outside the gas collection hood, and the limit frame 5 is installed on the top side of the rod body 2 to facilitate its fixation at the edge of the sewage treatment plant pool. According to the height of the biological pool of the actual sewage treatment plant from the ground, the connecting rod of the device is increased or decreased independently. The air pump of the oxygen mass transfer efficiency measurement device is turned on, which can create a negative pressure at one end of the suction pipe inside the gas collection hood, thereby improving the efficiency of the suction pipe in collecting tail gas. When the test is completed, first remove the counterweight block 4, and the return spring 3 returns to its original position. Then, the gas collection hood can be folded and stored through the support rod 11. At this time, the device can be conveniently stored and transported. Therefore, the present invention can play a role in collecting the tail gas of the biological pool for measuring the oxygen mass transfer efficiency of the sewage treatment plant, has strong practicality for on-site testing of sewage treatment plants, and can representatively collect the tail gas at the sampling location. And the whole can be disassembled, unfolded or folded and stored, is easier to carry and move, and has strong practicality.

[0049] Within the technical scope disclosed in the present invention, changes or substitutions that can be easily thought of should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the said claims.

Claims

1. A portable oxygen mass transfer efficiency measurement system, characterized in that, Comprising: An air collecting hood (1), an air collecting hood (1) is connected with a gas monitoring module; A rod body (2), connected to the air collecting hood (1) and arranged at the lower part of the rod body (2); The air collecting hood (1) includes a support rod (11), a connecting rod (12) hinged to the support rod (11), and a cloth piece arranged outside the support rod (11). The upper end of the support rod (11) is hinged to a sliding sleeve (13). The rod body (2) slides along the sliding sleeve (13), and one end of the connecting rod (12) is hinged and installed on the rod body (2).

2. The portable oxygen mass transfer efficiency measurement system according to claim 1, wherein: A return spring (3) is arranged between the rod body (2) and the sliding sleeve (13).

3. The portable oxygen mass transfer efficiency measurement system according to claim 2, wherein: A counterweight block (4) is slidably arranged on the rod body (2), and the sliding of the counterweight block (4) causes the sliding sleeve (13) to move downward.

4. The portable oxygen mass transfer efficiency measurement system according to claim 1, wherein: A limiting frame (5) is arranged on the rod body (2).

5. The portable oxygen mass transfer efficiency measurement system according to claim 1, wherein: A connecting part (6) is arranged on the rod body (2) for assembling multiple rod bodies (2).

6. The portable oxygen mass transfer efficiency measurement system according to claim 1, characterized in that: The rod body (2) is of a telescopic rod structure.

7. The portable oxygen mass transfer efficiency measurement system according to claim 1, characterized in that: The rod body (2) is of a hollow structure, and one side of the rod body (2) is connected to an air suction pipe.

8. The portable oxygen mass transfer efficiency measurement system according to claim 7, wherein: A plurality of air holes are arranged at the lower end of the rod body (2).

9. A method for measuring oxygen mass transfer efficiency, characterized in that, Using the portable oxygen mass transfer efficiency measurement system according to any one of claims 1 to 8, comprising: Determine the test depth and adjust the rod body (2) to an appropriate length; Lower the air collecting hood (1) into the test point; Control the sliding sleeve (13) to move downward, so that the support rod (11) moves, and then the air collecting hood (1) unfolds; Introduce the gas in the air collecting hood (1) into the gas monitoring module to measure the oxygen mass transfer efficiency.

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