Gas-collecting hood with defoaming function

Abstract

The utility model discloses a gas-collecting hood with a defoaming function, which relates to the technical field of environmental protection waste gas treatment, and comprises a pool arched cover plate connected with the pool wall of a pool structure, the pool arched cover plate and the pool wall form a closed space, and a spraying system is arranged on the inner side of the pool arched cover plate; the secondary square arch structure is arranged in the middle of the pool arched cover plate, the top of the secondary square arch structure is connected with a collecting air pipe, and a defoaming layer silk screen is arranged in the secondary square arch structure; the gas-collecting hood with the defoaming function is integrated, low in energy consumption and stable in treatment effect, and aims at solving the problem of eliminating oily foam in the waste gas collection process of a water treatment unit in a wastewater treatment station in the petrochemical industry and the like. A defoaming agent spraying system, a secondary square arch structure and a defoaming layer silk screen are mounted on the inner side of the arched cover plate of the water tank to treat oily foam.

Description

Technical Field

[0001] The utility model belongs to the technical field of environmental protection waste gas treatment, and more specifically relates to a gas collecting hood with a defoaming function. Background Art

[0002] In wastewater treatment stations supporting petrochemical plants, the oily foam in the waste gas from the pool is mainly caused by multiple factors, including highly emulsified wastewater generated during the production process, fermentation of microorganisms in the pool, and water disturbance. During the process of collecting the tail gas in the pool, the oily foam generated in the water is difficult to eliminate in time, leading to problems in the collection and treatment of this type of waste gas. Specifically, the phenomena include:

[0003] 1. Foam blocks the pipeline, causing the pressure drop in the pipeline to increase, which indirectly leads to a decrease in collection efficiency. The internal space of the pool body after the cover is added changes from the original negative pressure to positive pressure, and the odor is easy to overflow;

[0004] 2. The foam has not been eliminated at the equipment, which affects the normal operation of the equipment, and concurrently causes multiple problems such as affecting maintenance and obstructing the view of internal space inspection.

[0005] The generation of oily foam is diverse and cannot be effectively contained in the previous water treatment process. Therefore, the generation of large amounts of oily foam is an unavoidable problem in the exhaust gas collection of such wastewater treatment plants. Utility Model Content

[0006] The purpose of the utility model is to address the deficiencies in the existing technology and provide an air collecting hood with a defoaming function. The air collecting hood is an integrated, low-energy-consuming, and stable-treatment-effect air collecting hood with a defoaming function. It aims to eliminate the oily foam in the waste gas collection process of the water treatment unit in the wastewater treatment station in the petrochemical industry, etc., and adopts a defoaming agent spray system, a quadratic arch structure, and a defoaming layer screen installed on the inner side of the arch cover of the water pool to treat the oily foam.

[0007] In order to achieve the above object, the utility model provides a gas collecting hood with defoaming function, comprising:

[0008] The arched cover of the pool is connected to the pool wall of the pool structure, and the two form a closed space. The inner side of the arched cover of the pool is provided with a spray system;

[0009] The quadratic arch structure is centrally arranged on the arched cover plate of the pool. The top of the quadratic arch structure is connected to a collecting air duct. A defoaming layer screen is arranged in the quadratic arch structure.

[0010] Optionally, the spraying system includes a plurality of spray heads and a defoaming agent spray pipe, and the spray heads are connected to the defoaming agent spray pipe.

[0011] Optionally, a plurality of the nozzles are evenly arranged on the arched cover plate of the pool, and the nozzles and the arched cover plate of the pool are an integrated structure.

[0012] Optionally, the nozzle is a solid cone nozzle, and the spray coverage of the solid cone nozzle is not less than 120°.

[0013] Optionally, the cross-sectional dimension of the air collecting duct is smaller than the cross-sectional dimension of the quadratic arch structure.

[0014] Optionally, the edge of the arched cover of the pool is connected to the pool wall of the pool structure through a fixing piece.

[0015] Optionally, an inspection cover is provided on the side wall of the quadratic arch structure, and the defoaming layer wire mesh is detachably connected to the quadratic arch structure.

[0016] Optionally, the inspection cover is a transparent plate.

[0017] Optionally, the defoaming agent spray pipe is connected to a spray pump.

[0018] The utility model provides a gas collecting hood with a defoaming function, which has the following beneficial effects:

[0019] 1. The inner side of the arched cover of the water pool in the gas collection hood is integrated with a nozzle and a defoaming agent spray pipe, which can spray the defoaming liquid on the foam inside the gas collection hood to prevent the accumulation and spread of foam;

[0020] 2. A secondary arch structure is set in the center of the arched cover of the water pool in the gas collecting hood. The wind speed is changed by multiple diameter reduction measures of the collecting space-secondary arch structure opening-collecting air duct, which has the effect of eliminating foam.

[0021] 3. The gas collecting hood is provided with a defoaming layer of wire mesh in the quadratic arch structure, which can block the foam entering the collection pipe.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0024] Figure 1 A schematic structural diagram of an air collecting hood with a defoaming function according to an embodiment of the present utility model is shown.

[0025] Description of reference numerals:

[0026] 1. Pool wall; 2. Pool arch cover; 3. Quadratic arch structure; 4. Air collection port; 5. Defoamer spray pipe; 6. Nozzle; 7. Fixings; 8. Oily foam; 9. Defoamer spray diagram; 10. Inspection cover; 11. Defoamer layer screen. DETAILED DESCRIPTION

[0027] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0028] The utility model provides a gas collecting hood with a defoaming function, comprising:

[0029] The arched cover of the pool is connected to the pool wall of the pool structure, and the two form a closed space. A sprinkler system is provided on the inner side of the arched cover of the pool;

[0030] The quadratic arch structure is centrally arranged on the arched cover plate of the pool. The top of the quadratic arch structure is connected with a collecting air duct, and a defoaming layer screen is arranged in the quadratic arch structure.

[0031] Specifically, the air collecting hood completely covers and seals the pool through the pool arch cover, so that the oily foam in the pool gathers to the top of the pool arch cover. First, the defoaming agent can be sprayed through the spray system to prevent the accumulation and spread of foam. The untreated foam is concentrated in the quadratic arch structure and then completely eliminated through the defoaming layer mesh.

[0032] Optionally, the spraying system includes a plurality of spray heads and a defoaming agent spray pipe, and the spray heads are connected to the defoaming agent spray pipe.

[0033] Optionally, a plurality of nozzles are evenly arranged on the arched cover plate of the pool, and the nozzles and the arched cover plate of the pool form an integrated structure.

[0034] Specifically, the defoaming agent spraying system is integrated into the arched cover of the pool. No secondary installation is required. The cover is in place and the system is completed. It is only necessary to connect the corresponding reserved port to the defoaming agent pump into the joint. When oily foam needs to be defoamed, the defoaming agent can be sent to the nozzle through the spray pipe and finally sprayed.

[0035] Optionally, the nozzle is a solid cone nozzle, and the spray coverage of the solid cone nozzle is not less than 120°.

[0036] Specifically, since the air of the spray system is collected on the inner side of the arched cover of the water pool, the nozzle is set to a solid cone nozzle with relatively small resistance and a spray range greater than 120°. This is not easy to be clogged, and the nozzle can achieve a more uniform drug dispersion effect.

[0037] Optionally, the cross-sectional dimension of the air collecting duct is smaller than the cross-sectional dimension of the quadratic arch structure.

[0038] Specifically, during the process of oily foam gathering and rising, the radial dimensions of the three parts, namely, the connection between the arch cover of the pool and the quadratic arch structure, the connection between the quadratic arch structure and the collecting air duct, and the collecting air outlet above the collecting air duct, gradually become smaller, thereby changing the flow velocity of the oily bubbles, which is conducive to the elimination of oily bubbles.

[0039] Optionally, the edge of the arched cover plate of the pool is connected to the pool wall of the pool structure through a fixing piece.

[0040] Optionally, an inspection cover is provided on the side wall of the quadratic arch structure, and the defoaming layer screen is detachably connected to the quadratic arch structure.

[0041] Specifically, an inspection cover is provided on the quadratic arch structure. After the defoaming layer screen has been running for a period of time, the inspection cover can be opened to take out the defoaming layer screen for cleaning, thereby improving the defoaming efficiency.

[0042] Optionally, the inspection cover is a transparent plate.

[0043] Optionally, the defoaming agent spray pipe is connected to a spray pump.

[0044] Specifically, the inspection cover is set as a transparent plate, so that the defoaming effect of the defoaming layer screen can be observed without opening the inspection cover. When more and more foam appears on the defoaming layer screen, the defoaming agent source pressure and flow of the defoaming agent nozzle can be adjusted as appropriate, or the inspection cover can be opened to clean the defoaming layer screen.

[0045] Example

[0046] like Figure 1 As shown, the utility model provides an air collecting hood with a defoaming function, comprising:

[0047] The arched cover plate 2 of the pool is connected to the pool wall 1 of the pool structure, and the two form a closed space. A spray system is provided on the inner side of the arched cover plate 2 of the pool;

[0048] The quadratic arch structure 3 is centrally arranged on the arched cover plate 2 of the pool. The top of the quadratic arch structure 3 is connected to a collecting air duct. A defoaming layer screen 11 is arranged in the quadratic arch structure 3 .

[0049] In this embodiment, the spraying system includes a plurality of spray heads 6 and a defoaming agent spraying pipe 5 , and the spray heads 6 are connected to the defoaming agent spraying pipe 5 .

[0050] In this embodiment, a plurality of nozzles 6 are evenly arranged on the arched cover plate 2 of the pool, and the nozzles 6 and the arched cover plate 2 of the pool are an integrated structure.

[0051] In this embodiment, the nozzle 6 is a solid cone nozzle, and the spray coverage of the solid cone nozzle is not less than 120°.

[0052] In this embodiment, the cross-sectional dimension of the air collecting port 4 of the air collecting duct is smaller than the cross-sectional dimension of the quadratic arch structure 3 .

[0053] In this embodiment, the edge of the arched cover plate 2 of the pool is connected to the pool wall 1 of the pool structure through a fixing member 7 .

[0054] In this embodiment, an inspection cover 10 is provided on the side wall of the quadratic arch structure 3, and the defoaming layer screen is detachably connected to the quadratic arch structure.

[0055] In this embodiment, the inspection cover 10 is a transparent plate.

[0056] In this embodiment, the defoaming agent spray pipe 5 is connected to the spray pump.

[0057] In summary, the installation method of the air collecting hood is as follows: first, the arched cover plate 2 of the pool is fixed to the pool wall 1 of the pool structure through the fixing parts 7, so that the oily foam 8 can be collected in a closed space, and the oily foam 8 can only be collected in front of the collection air outlet 4. The operation process of the air collecting hood is as follows: first, the defoaming agent is sent to the nozzle 6 through the defoaming agent spray pipe 5, and the defoaming agent is sprayed through the nozzle 6 to achieve preliminary elimination. At the same time, oily foam 8 is accumulated at the connection between the quadratic arch structure 3 and the arched cover plate 2 of the pool, and the oily foam is completely eliminated through the defoaming layer screen 11. During the defoaming process, the defoaming layer screen 11 is regularly observed through the inspection cover 10, and the flow of the defoaming agent is adjusted in time and the defoaming layer screen 11 is cleaned regularly.

[0058] After the sewage treatment plant structure was enclosed with an air collecting hood of this structure, the odor collection effect was good, and no foam appeared in the pipes and treatment equipment. Before the renovation, there was a noticeable odor around the cover, which did not meet environmental protection standards and posed a serious safety hazard. After the renovation, the structure has been operating stably for two years, with no odor near the cover and the collection pipes unobstructed. After testing, the odor concentration of the air environment sampled from the top of the pool was 230 before the renovation, and the odor concentration of the air environment sampled from the top of the pool after the renovation was less than 10, meeting the requirements of the "Odor Pollutant Emission Standard" GB14554 plant boundary emission limit. In addition, before the renovation, the odor collection system inhaled a lot of foam, and the packing in the treatment equipment was blocked and cleaned many times, and even replaced. After the renovation, the system operates normally, and there has never been a problem of clogging the demisting packing. The equipment maintenance efficiency has been improved, and the maintenance frequency has been significantly reduced.

[0059] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A gas collecting hood with defoaming function, characterized in that: include: The arched cover of the pool is connected to the pool wall of the pool structure, and the two form a closed space. The inner side of the arched cover of the pool is provided with a spray system; The quadratic arch structure is centrally arranged on the arched cover plate of the pool. The top of the quadratic arch structure is connected to a collecting air duct. A defoaming layer screen is arranged in the quadratic arch structure.

2. The gas collecting hood with defoaming function according to claim 1, characterized in that: The spraying system includes a plurality of spray heads and a defoaming agent spray pipe, and the spray heads are connected to the defoaming agent spray pipe.

3. The gas collecting hood with defoaming function according to claim 2, characterized in that: A plurality of the nozzles are evenly arranged on the arched cover plate of the pool, and the nozzles and the arched cover plate of the pool form an integrated structure.

4. The gas collecting hood with defoaming function according to claim 3, characterized in that: The nozzle is a solid cone nozzle, and the spray coverage of the solid cone nozzle is not less than 120°.

5. The gas collecting hood with defoaming function according to claim 1, characterized in that: The cross-sectional dimension of the air collecting duct is smaller than the cross-sectional dimension of the quadratic arch structure.

6. The gas collecting hood with defoaming function according to claim 1, characterized in that: The edge of the arched cover plate of the pool is connected to the pool wall of the pool structure through a fixing piece.

7. The gas collecting hood with defoaming function according to claim 1, characterized in that: An inspection cover is provided on the side wall of the quadratic arch structure, and the defoaming layer screen is detachably connected to the quadratic arch structure.

8. The gas collecting hood with defoaming function according to claim 7, characterized in that: The inspection cover is a transparent plate.

9. The gas collecting hood with defoaming function according to claim 2, characterized in that: The defoaming agent spray pipe is connected to the spray pump.

Images