On-site gas detecting and drying device for sewage treatment plant

Abstract

The utility model relates to the technical field of environmental monitoring, in particular to an on-site gas detection drying device for a sewage treatment plant, which comprises a portable stink detector, a first gas inlet hose, a second gas inlet hose, a drying device and a sampling probe, the drying device and the portable odor detector are connected through the second air inlet hose, the drying device comprises a drying cylinder and a sealing cover covering the drying cylinder, and the drying cylinder is filled with a drying agent; the gas detection device solves the technical problem that the existing gas detection device in the market is influenced in the detection process and is not high in reliability.

Description

Technical Field

[0001] This utility model relates to the field of environmental monitoring technology, and in particular to a gas detection and drying device for wastewater treatment plants. Background Technology

[0002] Currently, in the detection of odor pollutants in urban wastewater treatment plants, existing gas drying technologies mainly employ the following three methods, but all of them have significant technical drawbacks:

[0003] 1. Physical adsorption method: An activated carbon adsorption tower is used, which is filled with granular activated carbon. The gas passes through the adsorption layer at a flow rate of 0.5-1.2 m / s. Some systems are equipped with a pre-filter glass fiber membrane to intercept liquid water droplets. However, the physical adsorption method has technical problems such as humidity sensitivity failure, frequent regeneration requirements, and excessive pressure loss.

[0004] 2. Chemical absorption method: Two-stage scrubbing towers are connected in series. The first stage is filled with sodium hydroxide solution and the second stage is filled with calcium chloride solution. The gas passes through the liquid layer in the form of bubbles. The chemical absorption method has technical problems such as selective removal, secondary pollution and equipment corrosion.

[0005] 3. Condensation dehydration method: The gas is cooled to 5-10℃ using a semiconductor refrigeration chip, and the water is condensed and discharged through a steam trap. The condensation dehydration method has technical problems such as aerosol interference, high energy consumption, and low-temperature adsorption effect.

[0006] All three methods mentioned above share common technical drawbacks, such as poor humidity adaptability, high maintenance complexity, and interference from multiple components.

[0007] Chinese patent application number 202410247196.8 discloses a gas drying device, including a drying component, a return component, and a retarding motor mounted on an assembly frame. A regeneration component is disposed between the bottoms of the drying component and the return component. Gas is injected into the first cylinder of the drying component and enters a spiral channel within the first cylinder. The spiral channel guides a molecular sieve that has been thermally regenerated by the regeneration component, ensuring sufficient contact between the molecular sieve and the gas. Simultaneously, the retarding motor drives a rotating drum to rotate in the opposite direction to the downward spiral channel. As the molecular sieve rolls downward within the spiral channel under the influence of gravity, friction is generated between the inner wall of the spiral channel and the molecular sieve due to the rotation of the drum. This friction counteracts the gravity acting on the molecular sieve, thereby reducing the residence time of the molecular sieve within the rotating drum, increasing the contact time with the gas, and improving the gas drying effect. While the technical solution proposed in the above invention improves the gas drying effect through structural improvements, it does not address improvements in areas such as eliminating condensate interference, enhancing equipment protection, or strengthening detection reliability. Utility Model Content

[0008] Therefore, in order to solve the above-mentioned technical problems, this utility model proposes an on-site gas detection and drying device for sewage treatment plants, which solves the technical problem of low reliability caused by the influence of the detection process in existing gas detection devices on the market.

[0009] To achieve the above objectives, the present invention adopts the following technical solution: a wastewater treatment plant on-site gas detection and drying device, comprising a portable odor detector, a first air inlet hose, a second air inlet hose, a drying device, and a sampling probe. The sampling probe and the drying device are connected through the first air inlet hose, and the drying device and the portable odor detector are connected through the second air inlet hose. The drying device includes a drying cylinder and a sealing cap covering the drying cylinder, and the drying cylinder is filled with a desiccant.

[0010] Furthermore, the sealing cover is provided with an air inlet and an air outlet. The first air inlet hose enters the drying cylinder through the air inlet, and the second air inlet hose enters the drying cylinder through the air outlet.

[0011] Furthermore, a support column is provided on the bottom surface of the sealing cover, and the first air inlet hose enters the drying cylinder through the air inlet and is spirally wound around the support column.

[0012] Furthermore, the first air intake hose is provided with vent holes at intervals, with a 1cm interval between two adjacent vent holes.

[0013] Furthermore, the first air intake hose spirals downwards to the bottom of the drying cylinder, and the second air intake hose extends upwards from the bottom of the drying cylinder through the air outlet and connects to the portable odor detector.

[0014] Furthermore, the desiccant includes sodium hydroxide and anhydrous calcium chloride.

[0015] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0016] This invention utilizes the dehumidification design of chemical desiccants sodium hydroxide and calcium chloride to reduce gas humidity from 80-95%RH under normal operating conditions to below 30%RH (laboratory measured data). This effectively eliminates the adsorption / dissolution effect of gaseous pollutants on the pipe wall. Comparative experiments show that the detection deviation of characteristic pollutants such as ammonia and hydrogen sulfide has been reduced from ±15% to within ±5%, meeting the precise detection requirements of the "Odor Pollutant Emission Standard" (GB14554-93).

[0017] At the same time, it improved equipment reliability, increased economic benefits, and improved operation and maintenance efficiency. Attached Figure Description

[0018] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0019] Figure 1 This is a connection diagram of the various components of this utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the drying device of this utility model;

[0021] Figure 3 This is a top view of the sealing cover of this utility model. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1-3 This utility model provides an on-site gas detection and drying device for sewage treatment plants, including a portable odor detector 1, a first air inlet hose 2, a second air inlet hose 3, a drying device 4, and a sampling probe 5. The sampling probe 5 and the drying device 4 are connected through the first air inlet hose 2, and the drying device 4 and the portable odor detector 1 are connected through the second air inlet hose 3. The drying device 4 includes a drying cylinder 42 and a sealing cap 41 covering the drying cylinder 42. The drying cylinder 42 is filled with a desiccant 6.

[0024] The sealing cover 41 is provided with an air inlet 412 and an air outlet 411. The first air inlet hose 2 enters the drying cylinder 42 through the air inlet 412, and the second air inlet hose 3 enters the drying cylinder 42 through the air outlet 411. A support column 413 is provided on the bottom surface of the sealing cover 41. The first air inlet hose 2 enters the drying cylinder 42 through the air inlet 412 and is spirally wound around the support column 413. Vent holes 21 are provided on the first air inlet hose 2 at intervals, with a 1cm interval between two adjacent vent holes 21.

[0025] The first air inlet hose 2 spirals downwards to the bottom of the drying cylinder 42, and the second air inlet hose 3 runs upwards from the bottom of the drying cylinder 42 through the air outlet 411 and connects to the portable odor detector 1.

[0026] The desiccant 6 comprises sodium hydroxide and anhydrous calcium chloride, which are mixed in a 1:1 ratio.

[0027] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A wastewater treatment plant on-site gas detection and drying device, comprising a portable odor detector, a first inlet hose, a second inlet hose, a drying device, and a sampling probe, characterized in that: The sampling probe and the drying device are connected via the first air inlet hose, and the drying device and the portable odor detector are connected via the second air inlet hose. The drying device includes a drying cylinder and a sealing cap covering the drying cylinder, and the drying cylinder is filled with a desiccant.

2. The wastewater treatment plant on-site gas detection and drying device according to claim 1, characterized in that: The sealing cover is provided with an air inlet and an air outlet. The first air inlet hose enters the drying cylinder through the air inlet, and the second air inlet hose enters the drying cylinder through the air outlet.

3. The wastewater treatment plant on-site gas detection and drying device according to claim 2, characterized in that: A support column is provided on the bottom surface of the sealing cover. The first air inlet hose enters the drying cylinder through the air inlet hole and is spirally wound around the support column.

4. The wastewater treatment plant on-site gas detection and drying device according to claim 3, characterized in that: The first air intake hose is provided with vent holes at intervals, with a 1cm interval between two adjacent vent holes.

5. The wastewater treatment plant on-site gas detection and drying device according to claim 4, characterized in that: The first air inlet hose spirals downwards to the bottom of the drying cylinder, and the second air inlet hose runs upwards from the bottom of the drying cylinder through the air outlet and connects to the portable odor detector.

6. The wastewater treatment plant on-site gas detection and drying device according to claim 5, characterized in that: The desiccant includes sodium hydroxide and anhydrous calcium chloride.

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