Gas-liquid treatment device, garbage transfer station and gas-liquid treatment method

Abstract

This invention discloses a gas-liquid treatment device, a waste transfer station, and a gas-liquid treatment method. The gas-liquid treatment device includes an odor treatment unit and a leachate treatment unit. The odor treatment unit includes an alkaline spray tower, and the leachate treatment unit includes a coagulation and sedimentation unit. The alkaline spray tower and the coagulation and sedimentation unit are connected, allowing alkaline wastewater from the alkaline spray tower to flow into the coagulation and sedimentation unit to provide alkalinity for the leachate's coagulation and sedimentation process. By incorporating the alkaline spray tower and the coagulation and sedimentation unit, odor and leachate are purified. Furthermore, by inputting the alkaline wastewater from the alkaline spray tower into the coagulation and sedimentation unit, the pH level within the unit is improved, ensuring and enhancing the coagulation and sedimentation effect. This also increases the integration of the gas-liquid treatment device, improves energy and resource utilization, reduces manufacturing and operating costs, and decreases the overall volume and footprint of the device.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology, and in particular to a gas-liquid treatment device, a waste transfer station, and a gas-liquid treatment method. Background Technology

[0002] Existing waste transfer stations generate two types of pollutants—odor and leachate—due to the presence of waste. Both pollutants need to be treated at the waste transfer station to meet emission standards before they can be released.

[0003] Currently, most waste transfer stations separate odor treatment equipment and leachate treatment equipment. The leachate treatment equipment treats leachate independently, and the odor treatment equipment treats odor independently. This not only occupies a lot of space, resulting in a large space requirement for waste transfer stations, but also leads to a certain degree of energy and resource waste.

[0004] Based on the above, there is an urgent need for a gas-liquid treatment device, a waste transfer station, and a gas-liquid treatment method that can solve one of the aforementioned technical problems. Summary of the Invention

[0005] One object of the present invention is to provide a gas-liquid treatment device that can treat odor and leachate generated from garbage, and has a small footprint and high energy and resource utilization rate.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A gas-liquid treatment device is used to treat odors and leachate generated from waste. The gas-liquid treatment device includes odor treatment equipment and leachate treatment equipment. The odor treatment equipment includes an alkaline spray tower, and the leachate treatment equipment includes a coagulation and sedimentation treatment unit. The alkaline spray tower and the coagulation and sedimentation treatment unit are connected. The alkaline waste liquid in the alkaline spray tower can flow into the coagulation and sedimentation treatment unit to provide alkalinity for the coagulation and sedimentation process of the leachate.

[0008] Optionally, the alkaline spray tower is connected to a buffer tank via a first pipe. The buffer tank is used to store the alkaline waste liquid. The buffer tank is connected to the coagulation and sedimentation treatment unit via a second pipe. The first pipe is equipped with a first switch valve, and the second pipe is equipped with a second switch valve.

[0009] Optionally, the above-mentioned odor treatment equipment further includes a demister, which is connected to the outlet end of the alkaline spray tower and is connected to the leachate treatment equipment via a third pipe so as to input the liquid generated in the demister into the leachate treatment equipment.

[0010] Optionally, the leachate treatment equipment further includes an advanced oxidation treatment unit located downstream of the coagulation and sedimentation treatment unit, and the demister is connected to the advanced oxidation treatment unit via the third pipe.

[0011] Optionally, the leachate treatment equipment further includes an odor collection and treatment unit, which is connected to the odor treatment equipment. The odor collection and treatment unit is used to collect the odor generated by the leachate treatment equipment and input it into the alkaline spray tower. The odor treatment equipment is used to treat the odor generated by the waste and the odor generated by the leachate treatment equipment.

[0012] Optionally, the above-mentioned odor treatment equipment further includes a demister, a deodorizer, an exhaust stack, and a fan, wherein the alkaline spray tower, the demister, the deodorizer, and the exhaust stack are connected in sequence, and the fan is used to drive the gas flow in the above-mentioned odor treatment equipment; and / or,

[0013] The aforementioned leachate treatment equipment further includes a coagulation-flotation treatment unit, an advanced oxidation treatment unit, an anoxic treatment unit, an aerobic treatment unit, and an MBR treatment unit, which are connected in sequence.

[0014] Optionally, the above-mentioned gas-liquid treatment device further includes a control device, which is connected to the above-mentioned odor treatment device and the above-mentioned leachate treatment device, and is used to control the above-mentioned odor treatment device and the above-mentioned leachate treatment device.

[0015] The beneficial effects of the gas-liquid treatment device provided by this invention are as follows: by setting up an alkaline spray tower in the odor treatment equipment, the purification and absorption effect of odor is ensured; by setting up a coagulation and sedimentation treatment unit in the leachate treatment equipment, the purification and sedimentation effect of leachate is ensured; and by inputting the alkaline waste liquid from the alkaline spray tower into the coagulation and sedimentation treatment unit, the pH in the coagulation and sedimentation treatment unit is improved, ensuring and improving the coagulation and sedimentation effect, thereby guaranteeing the purification and sedimentation effect of leachate. Furthermore, it avoids the need to set up a separate waste liquid treatment unit for the odor treatment equipment, improves the integration of the gas-liquid treatment device, increases energy and resource utilization, reduces the manufacturing and operating costs of the gas-liquid treatment device, and also reduces the overall volume and area occupied by the gas-liquid treatment device.

[0016] The second objective of this invention is to provide a waste transfer station that can treat the odor and leachate generated by waste, while occupying a small space and having a high energy and resource utilization rate.

[0017] To achieve this objective, the present invention also employs the following technical solutions:

[0018] A waste transfer station includes the aforementioned gas-liquid treatment device. The waste transfer station includes an upper space and a lower space. The lower space is located below the upper space. The upper space contains the odor treatment equipment of the aforementioned gas-liquid treatment device, and the lower space contains the leachate treatment equipment of the aforementioned gas-liquid treatment device.

[0019] The beneficial effects of the waste transfer station provided by this invention are as follows: By placing the odor treatment equipment in the upper space and the leachate treatment equipment in the lower space, the floor space required is greatly reduced. Compared with current treatment equipment, this significantly lowers the construction cost of the waste transfer station, facilitates its miniaturization, and provides convenience for setting up the aforementioned gas-liquid treatment device. Simultaneously, by inputting the alkaline waste liquid from the alkaline spray tower into the coagulation and sedimentation treatment unit, the pH level in the unit is improved, ensuring and enhancing the coagulation and sedimentation effect. This guarantees the purification and sedimentation effect of the leachate, avoids the need for a separate waste liquid treatment unit for the odor treatment equipment, improves the integration of the gas-liquid treatment device, increases energy and resource utilization, reduces the manufacturing and operating costs of the waste transfer station, and also reduces the overall volume and floor space occupied by the waste transfer station.

[0020] The third objective of this invention is to provide a gas-liquid treatment method that has good treatment effect on odor and leachate, and high energy and resource utilization rate.

[0021] To achieve this objective, the present invention adopts the following technical solution:

[0022] Gas-liquid treatment methods for treating odorous gases and leachate include:

[0023] The aforementioned odorous gases generated from the waste are fed into an odor treatment device for treatment, and the aforementioned odorous gases generated during the treatment of the aforementioned leachate are also fed into the aforementioned odor treatment device for treatment; the aforementioned leachate generated from the waste is fed into a leachate treatment device for treatment, and the liquid generated during the treatment of the aforementioned odorous gases is fed into the aforementioned leachate treatment device for treatment; the aforementioned liquid generated during the treatment of the aforementioned odorous gases includes alkaline waste liquid, and the aforementioned alkaline waste liquid is added to the coagulation and sedimentation treatment unit of the aforementioned leachate treatment device to provide alkalinity.

[0024] Optionally, the above gas-liquid treatment method further includes:

[0025] The aforementioned odorous gases are sequentially treated with spraying, demisting, and deodorizing; and / or,

[0026] The above leachate was subjected to coagulation sedimentation treatment, coagulation flotation treatment, advanced oxidation treatment, anoxic treatment, aerobic treatment, and MBR treatment in sequence.

[0027] The beneficial effects of the gas-liquid treatment method provided by this invention are as follows: By using odor treatment equipment to treat the odor generated from waste and the odor generated during leachate treatment, and by using leachate treatment equipment to treat the leachate generated from waste and the liquid generated during odor treatment, the odor treatment equipment and leachate treatment equipment are combined. This simplifies the gas-liquid treatment method and equipment while ensuring the treatment effect on both odor and leachate, integrating the odor treatment process with the leachate treatment process into one. Simultaneously, the alkaline waste liquid generated during odor treatment provides alkalinity for the coagulation and sedimentation process of leachate treatment, improving the pH in the coagulation and sedimentation unit, ensuring and improving the coagulation and sedimentation effect, thereby guaranteeing the purification effect of leachate, improving energy and resource utilization, and reducing gas-liquid treatment costs. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the gas-liquid treatment device provided by the present invention installed in a garbage transfer station;

[0029] Figure 2 yes Figure 1 A magnified view of a portion of point A in the middle.

[0030] In the picture:

[0031] 101. Alkaline spray tower; 102. First pipeline; 1021. First switch valve; 103. Buffer tank; 104. Second pipeline; 1041. Second switch valve; 105. Demister; 106. Third pipeline; 107. Deodorizer; 108. Fan; 109. Exhaust stack;

[0032] 201. Coagulation and sedimentation treatment unit; 202. Coagulation and flotation treatment unit; 203. Advanced oxidation treatment unit; 204. Anoxic treatment unit; 205. Aerobic treatment unit; 206. MBR treatment unit;

[0033] 1. Load-bearing plate; 2. Equipment room. Detailed Implementation

[0034] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] The following reference Figures 1 to 2 This invention introduces the gas-liquid treatment device, waste transfer station, and gas-liquid treatment method provided by the present invention.

[0038] This gas-liquid treatment unit is installed in a waste transfer station to treat odors and leachate generated from waste. (Reference) Figure 1 As shown, the gas-liquid treatment device includes odor treatment equipment and leachate treatment equipment. The odor treatment equipment includes an alkaline spray tower 101. After the odor enters the alkaline spray tower 101, it comes into contact with the circulating spray liquid in the spray zone of the alkaline spray tower 101, thereby absorbing the toxic and harmful components (mainly dust, particles, and acidic gases) in the odor into the spray liquid, achieving the effect of absorption and purification of the odor. The leachate treatment equipment includes a coagulation and sedimentation treatment unit 201. In this embodiment, the coagulation and sedimentation treatment unit 201 adopts a coagulation and sedimentation tank. After the leachate enters the coagulation and sedimentation tank, a coagulation and sedimentation agent is added to the coagulation and sedimentation tank to form flocs, thereby removing SS (suspended solids), TP (i.e., the sum of organic and inorganic phosphorus), etc., from the leachate.

[0039] It should be noted that many factors affect the coagulation and sedimentation effect during the leachate coagulation and sedimentation process, such as the pH of the leachate. Specifically, in actual treatment, since leachate is generally acidic, it is necessary to add coagulation and sedimentation agents such as caustic soda to the coagulation and sedimentation tank to increase its alkalinity, thereby ensuring the coagulation and sedimentation effect of the coagulation and sedimentation tank. In this embodiment, the alkaline spray tower 101 is connected to the coagulation and sedimentation tank. The alkaline waste liquid in the alkaline spray tower 101 (i.e., the spray liquid with poor absorption effect after multiple cycles) can flow into the coagulation and sedimentation tank to provide alkalinity for the leachate coagulation and sedimentation process, reducing the amount of coagulation and sedimentation agents added, lowering operating costs, and effectively treating alkaline waste liquid, avoiding the need to set up a separate waste liquid treatment unit for odor treatment equipment.

[0040] By installing an alkaline spray tower 101 in the odor treatment equipment, the purification and absorption effect of odor is ensured. By installing a coagulation and sedimentation treatment unit 201 in the leachate treatment equipment, the purification and sedimentation effect of leachate is ensured. Furthermore, by inputting the alkaline waste liquid from the alkaline spray tower 101 into the coagulation and sedimentation treatment unit 201, the pH in the coagulation and sedimentation treatment unit 201 is improved, ensuring and improving the coagulation and sedimentation effect. This guarantees the purification and sedimentation effect of leachate and avoids the need to set up a separate waste liquid treatment unit for the odor treatment equipment. It also improves the integration of the gas-liquid treatment device, increases energy and resource utilization, reduces the manufacturing and operating costs of the gas-liquid treatment device, and reduces the overall volume and footprint of the gas-liquid treatment device.

[0041] Specifically, such as Figure 2As shown, the alkaline spray tower 101 is connected to a buffer tank 103 via a first pipe 102, and a first switch valve 1021 is installed on the first pipe 102. The spray liquid in the alkaline spray tower 101 is recycled and repeatedly transported to the spraying area for atomized spraying, thereby improving the utilization rate of the spray liquid and reducing the operating cost of the alkaline spray tower 101. During normal circulating spraying, the first switch valve 1021 is in the closed state. However, after a preset recycling cycle, the purification and absorption effect of the spray liquid decreases significantly, and it is identified as waste liquid. At this time, the first switch valve 1021 is opened, and the alkaline waste liquid can flow into the buffer tank 103 for temporary storage through the first pipe 102. The buffer tank 103 is connected to the coagulation sedimentation tank via a second pipe 104. The second pipe 104 is equipped with a second switch valve 1041. When the pH level in the coagulation sedimentation tank deviates from the preset range (since the leachate is acidic, it generally deviates towards acidity, leading to a decrease in coagulation sedimentation effect), the second switch valve 1041 can be opened to introduce alkaline wastewater (with a pH value of approximately 10-11) into the coagulation sedimentation tank through the second pipe 104, thereby providing alkalinity and pulling the pH level back to the preset range to ensure effective coagulation sedimentation. For example, in this embodiment, the first switch valve 1021 is opened every week to introduce alkaline wastewater into the buffer tank 103.

[0042] Further, refer to Figure 1 As shown, the odor treatment equipment also includes a demister 105, which is connected to the outlet of the alkaline spray tower 101. The demister 105 further treats the odor after atomization spraying, discharging the mist droplets and toxic / harmful components carried in the odor as liquid. The demister 105 is connected to the leachate treatment equipment via a third pipe 106, allowing the liquid generated in the demister 105 to be input into the leachate treatment equipment for further treatment of the liquid and its toxic / harmful components. This further avoids the need for a separate waste liquid treatment unit for the odor treatment equipment, reducing the overall volume and footprint of the gas-liquid treatment device. Specifically, the leachate treatment equipment also includes an advanced oxidation treatment unit 203. In this embodiment, the advanced oxidation treatment unit 203 is an advanced oxidation tank located downstream of the coagulation sedimentation tank. The outlet of the third pipe 106 is connected to the advanced oxidation treatment unit 203.

[0043] Continue to refer to Figure 1As shown, the odor treatment equipment also includes a deodorizer 107, an exhaust stack 109, and a fan 108. The alkaline spray tower 101, demister 105, deodorizer 107, and exhaust stack 109 are connected in sequence. After being treated by the alkaline spray tower 101 and demister 105, the odorous gas enters the deodorizer 107, where organic matter and NH3 are further removed through plasma oxidation or UV photolysis. Finally, driven by the fan 108, the gas is discharged from the odor treatment equipment through the exhaust stack 109. Compared to commonly used biological filters, this odor treatment equipment occupies less space, is lighter, and has better treatment effects, making it particularly suitable for small waste transfer stations with limited space.

[0044] Continue to refer to Figure 1 As shown, in this embodiment, the leachate treatment equipment includes a coagulation sedimentation treatment unit 201, a coagulation flotation treatment unit 202, an advanced oxidation treatment unit 203, an anoxic treatment unit 204, an aerobic treatment unit 205, and an MBR treatment unit 206. The coagulation sedimentation treatment unit 201, the coagulation flotation treatment unit 202, the advanced oxidation treatment unit 203, the anoxic treatment unit 204, the aerobic treatment unit 205, and the MBR treatment unit 206 are connected in sequence. The leachate flows through each of the above treatment units in sequence in the leachate treatment equipment and is then discharged.

[0045] Specifically, in this embodiment, the coagulation sedimentation treatment unit 201, the coagulation flotation treatment unit 202, the advanced oxidation treatment unit 203, the anoxic treatment unit 204, and the aerobic treatment unit 205 are all tank-like structures. First, the leachate passes through the coagulation sedimentation tank to remove suspended solids (SS) and total phosphorus (TP), and then through the coagulation flotation tank to further remove SS and TP, while also removing floating oil. The wastewater then enters the advanced oxidation tank, where recalcitrant organic matter is converted into biodegradable organic matter. The wastewater then flows into the anoxic tank for COD (chemical oxygen demand) and TN (total nitrogen of organic matter, ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen) removal. After ammonia nitrogen and COD are removed in the aerobic tank, the wastewater enters the MBR treatment unit 206 for filtration, and finally, the wastewater meets discharge standards. The liquid generated by the demister 105 of the odor treatment system automatically enters the advanced oxidation tank by gravity, and then sequentially passes through the anoxic tank, the aerobic tank, and the MBR treatment unit 206 before finally meeting discharge standards.

[0046] This leachate treatment equipment abandons the traditional anaerobic process, does not produce flammable and explosive gases such as methane, and compared with the commonly used membrane processes such as nanofiltration and reverse osmosis, it does not produce concentrate while having a very good treatment effect.

[0047] Further, refer to Figure 1As shown, the coagulation and flotation treatment unit 202 and the anoxic treatment unit 204 in the leachate treatment equipment generate a certain amount of odor, while the aerobic treatment unit 205 also produces a certain odor due to bottom aeration. Both odors converge within the installation space of the leachate treatment equipment. Therefore, the leachate treatment equipment is also equipped with an odor collection and treatment unit (not shown in the figure). The odor collection and treatment unit is connected to the odor treatment equipment through a fourth pipe. The odor collection and treatment unit is used to collect the odor generated by the leachate treatment equipment and input it into the alkaline spray tower 101, so that the odor treatment equipment can treat the odor generated by the waste and the odor in the leachate treatment equipment, thereby avoiding environmental pollution caused by the odor generated in the leachate treatment equipment.

[0048] Preferably, in this embodiment, such as Figure 1 As shown, the odor treatment equipment is positioned above the leachate treatment equipment, forming a vertical structure that significantly reduces the floor space required. Compared to current treatment equipment, the floor space can be reduced by at least 30%, greatly lowering the installation cost of the gas-liquid treatment device and the construction cost of the waste transfer station, thus facilitating the miniaturization of the waste transfer station. Simultaneously, because the odor treatment equipment is positioned above the leachate treatment equipment, the length of the exhaust stack 109 is reduced. With less material, the end of the exhaust stack 109 can be made higher than the ground (e.g., over 15m), reducing the harmfulness of the emitted exhaust gas. Furthermore, because the odor treatment equipment is positioned above the leachate treatment equipment, under gravity, the alkaline waste liquid and the liquid generated by the demister 105 can directly flow into the leachate treatment equipment through the second pipe 104 and the third pipe 106, thereby eliminating the need for a drive pump, further simplifying the structure of the gas-liquid treatment device and reducing its cost. Meanwhile, since the odor collection and treatment unit is generally set above the leachate treatment equipment to ensure its collection effect, setting the odor treatment equipment above the leachate treatment equipment can reduce the length of the fourth pipe, thereby avoiding the traditional odor collection pipe layout from the top to the ground and then extending upwards, shortening the overall pipeline, further reducing investment costs, and reducing pipeline investment by at least 10%.

[0049] Optionally, in this embodiment, as Figure 1 As shown, the gas-liquid treatment device also includes a control device, which is connected to sensors, drive components, etc. in the odor treatment device and the leachate treatment device. Compared with the existing method of setting up control cabinets and other control devices for two separate processes, the present invention controls the odor treatment device and the leachate treatment device simultaneously through a single control device, which has a higher degree of integration, saves at least 10% of the cost, and also helps to reduce the probability of abnormal occurrences in the odor treatment device and the leachate treatment device.

[0050] The present invention also provides a waste transfer station, including the aforementioned gas-liquid treatment device. The waste transfer station includes an upper space and a lower space, with the lower space located below the upper space. The upper space contains an odor treatment device housing the gas-liquid treatment device, and the lower space contains a leachate treatment device housing the gas-liquid treatment device.

[0051] Specifically, such as Figure 1 As shown, the waste transfer station is divided into the aforementioned lower space and the aforementioned upper space. The lower and upper spaces are separated by a load-bearing plate 1 (which can be a partition installed separately on one floor or the ceiling of that floor). The lower space is enclosed, and the leachate treatment equipment's coagulation sedimentation treatment unit 201, coagulation flotation treatment unit 202, advanced oxidation treatment unit 203, anoxic treatment unit 204, aerobic treatment unit 205, MBR treatment unit 206, and odor collection unit are all located in the lower space. The odor collection unit is located at the top of the lower space, and the collected odor is input into the alkaline spray tower 101 of the odor treatment equipment through a fourth pipe. The length of the fourth pipe can be shortened, thereby reducing investment costs.

[0052] The lower space also includes equipment room 2, which contains control equipment for the gas-liquid treatment device. This control equipment is connected to the odor treatment device and the leachate treatment device, allowing both devices to be controlled by a single device, thus reducing investment costs.

[0053] Continue to refer to Figure 1 As shown, the odor treatment equipment includes the aforementioned alkaline spray tower 101, demister 105, deodorizer 107, exhaust stack 109, fan 108, and buffer tank 103. The alkaline spray tower 101, demister 105, deodorizer 107, exhaust stack 109, and fan 108 are located above the load-bearing plate 1. The buffer tank 103 is connected to the alkaline spray tower 101 and is located below the load-bearing plate 1, thereby facilitating the flow of alkaline waste liquid into the buffer tank 103 through the first pipe 102 under the action of gravity.

[0054] By placing the odor treatment equipment in the upper space and the leachate treatment equipment in the lower space, the footprint is significantly reduced. Compared to current treatment equipment, the footprint can be reduced by at least 30%, greatly lowering the construction cost of the waste transfer station and facilitating its miniaturization. This also provides convenience for installing the aforementioned gas-liquid treatment devices. Simultaneously, by inputting the alkaline waste liquid from the alkaline spray tower 101 into the coagulation and sedimentation treatment unit 201, the pH level in the unit is improved, ensuring and enhancing the coagulation and sedimentation effect. This guarantees the purification and sedimentation effect of the leachate and avoids the need for a separate waste liquid treatment unit for the odor treatment equipment. This improves the integration of the gas-liquid treatment device, increases energy and resource utilization, reduces the manufacturing and operating costs of the waste transfer station, and also reduces the overall volume and footprint of the station.

[0055] The present invention also provides a gas-liquid treatment method, using the above-described gas-liquid treatment device to treat odorous gases and leachate. Specifically, the gas-liquid treatment method includes:

[0056] Step S1: The odor generated from the waste is fed into the odor treatment equipment for treatment, and the odor generated during the leachate treatment process is also fed into the odor treatment equipment for treatment; the leachate generated from the waste is fed into the leachate treatment equipment for treatment, and the liquid generated during the odor treatment process is also fed into the leachate treatment equipment for treatment; the liquid generated during the odor treatment process includes alkaline waste liquid, which is added to the coagulation and sedimentation treatment unit 201 of the leachate treatment equipment to provide alkalinity.

[0057] Specifically, the leachate treatment equipment also includes an odor collection and treatment unit (not shown in the figure). This unit is connected to the odor treatment equipment via a fourth pipe. The odor collection and treatment unit collects the odor generated by the leachate treatment equipment and inputs it into the alkaline spray tower 101. This allows the odor treatment equipment to simultaneously treat the odor generated by the waste and the odor in the leachate treatment equipment, thus preventing the direct emission of odor from the leachate treatment equipment and subsequent environmental pollution. The alkaline wastewater generated by the alkaline spray tower 101 of the odor treatment system enters the aforementioned coagulation sedimentation tank, and then sequentially passes through a coagulation flotation tank, an advanced oxidation tank, an anoxic tank, an aerobic tank, and the MBR treatment unit 206 before finally meeting discharge standards. The liquid generated by the demister 105 automatically enters the advanced oxidation tank by gravity, and then sequentially passes through the anoxic tank, an aerobic tank, and the MBR treatment unit 206 before finally meeting discharge standards.

[0058] Therefore, in step S1, while the odor generated by the garbage is fed into the odor treatment equipment for treatment, the odor generated during the leachate treatment process is also fed into the odor treatment equipment for treatment through the odor collection unit of the leachate treatment equipment. Simultaneously, while the leachate generated by the garbage is fed into the leachate treatment equipment for treatment, the liquid generated by the spray tower and demister 105 in the odor treatment equipment is fed into the leachate treatment equipment for treatment through the first pipe 102, the second pipe 104, and the third pipe 106. This combines the odor treatment equipment and the leachate treatment equipment, simplifying the gas-liquid treatment method and device while ensuring the treatment effect on both odor and leachate, thus integrating the odor treatment process with the leachate treatment process into one integrated unit.

[0059] At the same time, such as Figure 2 As shown, the alkaline spray tower 101 is connected to a buffer tank 103 via a first pipe 102, and a first switch valve 1021 is installed on the first pipe 102. The spray liquid in the alkaline spray tower 101 is recycled and repeatedly transported to the spraying area for atomized spraying, thereby improving the utilization rate of the spray liquid and reducing the operating cost of the alkaline spray tower 101. During normal circulating spraying, the first switch valve 1021 is in the closed state. However, after a preset recycling cycle, the purification and absorption effect of the spray liquid decreases significantly, and it is identified as waste liquid. At this time, the first switch valve 1021 is opened, and the alkaline waste liquid can flow into the buffer tank 103 for temporary storage through the first pipe 102. The buffer tank 103 is connected to the coagulation sedimentation tank through the second pipe 104. The second pipe 104 is equipped with a second switch valve 1041. When the pH value in the coagulation sedimentation tank deviates from the preset range (since the leachate is acidic, it generally deviates towards the acidic direction, resulting in a decrease in the coagulation sedimentation effect), the second switch valve 1041 can be opened to input the alkaline waste liquid (with a pH value of about 10-11) into the coagulation sedimentation tank through the second pipe 104, thereby providing alkalinity and pulling the pH value in the coagulation sedimentation tank back to the preset range to ensure its coagulation sedimentation effect.

[0060] In the odor treatment process, the alkaline spray tower 101 used for spraying produces alkaline wastewater with a pH value of around 10-11. Since leachate is generally acidic, this makes the coagulation sedimentation tank of the leachate treatment equipment too acidic, which is not conducive to effective coagulation and sedimentation. Adding alkaline wastewater to the coagulation sedimentation tank provides alkalinity, reduces the amount of coagulation and sedimentation agents required, lowers operating costs, and ensures effective coagulation and sedimentation.

[0061] By combining odor treatment equipment to treat both waste-generated odors and leachate-generated odors, and leachate treatment equipment to treat both waste-generated leachate and odor-generated liquids, the gas-liquid treatment methods and devices are simplified while ensuring effective treatment of both odors and leachate. Simultaneously, the alkaline wastewater generated during odor treatment provides alkalinity to the leachate coagulation and sedimentation process, improving the pH balance in the coagulation and sedimentation unit 201, ensuring and enhancing the coagulation and sedimentation effect. This guarantees the purification of the leachate, improves energy and resource utilization, and reduces gas-liquid treatment costs.

[0062] Optionally, in this embodiment, the gas-liquid processing method includes:

[0063] Step S11: Spray the odorous gas, perform defogging treatment and deodorization treatment in sequence.

[0064] Specifically, spraying, defogging, and deodorizing treatments for odors require less floor space and are lighter than commonly used biological filters. They offer better treatment results and are suitable for small waste transfer stations with limited space. They are especially convenient for placing the odor treatment equipment above the leachate treatment equipment.

[0065] refer to Figure 1 As shown, the odor treatment equipment includes an alkaline spray tower 101, a deodorizer 107, an exhaust stack 109, and a blower 108. The alkaline spray tower 101, demister 105, deodorizer 107, and exhaust stack 109 are connected sequentially. After being treated by the alkaline spray tower 101 and demister 105, the odorous gas enters the deodorizer 107, where organic matter and NH3 are further removed through plasma oxidation or UV photolysis. Finally, driven by the blower 108, the gas is discharged from the odor treatment equipment through the exhaust stack 109. Compared to commonly used methods such as biological filters, this odor treatment method requires less land, uses lighter equipment, and has better treatment results, making it particularly suitable for small waste transfer stations with limited space.

[0066] Optionally, in this embodiment, the gas-liquid processing method includes:

[0067] Step S12: The leachate is subjected to coagulation sedimentation treatment, coagulation flotation treatment, advanced oxidation treatment, anoxic treatment, aerobic treatment, and MBR treatment in sequence.

[0068] Specifically, firstly, the leachate undergoes coagulation and sedimentation to remove suspended solids (SS) and total phosphorus (TP), followed by coagulation and flotation to further remove SS and TP, while also removing floating oil. Then, the wastewater undergoes advanced oxidation treatment to convert recalcitrant organic matter into biodegradable organic matter. Next, the wastewater undergoes anoxic treatment to remove COD (Chemical Oxygen Demand) and TN (Total Nitrogen, Ammonia Nitrogen, Nitrite Nitrogen, and Nitrate Nitrogen). After aerobic treatment to remove ammonia nitrogen and COD, the wastewater is filtered through an MBR (Mechanical Bioreactor) process, and finally, the wastewater meets discharge standards. This process sequentially treats the leachate through coagulation and sedimentation, coagulation and flotation, advanced oxidation, anoxic treatment, aerobic treatment, and MBR treatment, eliminating the need for traditional anaerobic processes and preventing the generation of flammable and explosive gases such as methane. Furthermore, compared to commonly used membrane processes such as nanofiltration and reverse osmosis, it does not produce concentrated liquid while still achieving excellent leachate treatment results.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A gas-liquid treatment device for treating odors and leachate, characterized by, The gas-liquid treatment device comprises an odor treatment device and a leachate treatment device, the odor treatment device comprises an alkaline spray tower (101), the leachate treatment device comprises a coagulation sedimentation treatment unit (201), the alkaline spray tower (101) is communicated with the coagulation sedimentation treatment unit (201), and alkaline waste liquid in the alkaline spray tower (101) can flow into the coagulation sedimentation treatment unit (201) to provide alkalinity for a coagulation sedimentation process of the leachate. The alkaline spray tower (101) is communicated with a buffer tank (103) through a first pipeline (102), the buffer tank (103) is used for storing the alkaline waste liquid, the buffer tank (103) is communicated to the coagulation sedimentation treatment unit (201) through a second pipeline (104), and the first pipeline (102) is provided with a first on-off valve (1021) and the second pipeline (104) is provided with a second on-off valve (1041).

2. The gas-liquid treatment device according to claim 1, wherein the odor treatment device further comprises a demister (105) which is communicated with a gas outlet end of the alkaline spray tower (101), and the demister (105) is communicated with the leachate treatment device through a third pipeline (106) to input liquid generated in the demister (105) into the leachate treatment device.

3. The gas-liquid treatment device according to claim 2, wherein the leachate treatment device further comprises an advanced oxidation treatment unit (203) which is located downstream of the coagulation sedimentation treatment unit (201), and the demister (105) is communicated with the advanced oxidation treatment unit (203) through the third pipeline (106).

4. The gas-liquid treatment device according to claim 1, wherein the leachate treatment device further comprises an odor collection treatment unit which is communicated with the odor treatment device, and the odor collection treatment unit is used for collecting the odor generated by the leachate treatment device and inputting the odor into the alkaline spray tower (101), and the odor treatment device is used for treating the odor generated by the garbage and the odor generated by the leachate treatment device.

5. The gas-liquid treatment device according to claim 1, wherein the odor treatment device further comprises a demister (105), a deodorizer (107), an exhaust cylinder (109) and a fan (108), the alkaline spray tower (101), the demister (105), the deodorizer (107) and the exhaust cylinder (109) are sequentially communicated, and the fan (108) is used for driving gas in the odor treatment device to flow; and / or, ​ ​ ​ ​ The leachate treatment device further comprises a coagulation air flotation treatment unit (202), an advanced oxidation treatment unit (203), an anoxic treatment unit (204), an aerobic treatment unit (205), and an MBR treatment unit (206), and the coagulation sedimentation treatment unit (201), the coagulation air flotation treatment unit (202), the advanced oxidation treatment unit (203), the anoxic treatment unit (204), the aerobic treatment unit (205), and the MBR treatment unit (206) are sequentially communicated.

6. The gas-liquid treatment device according to any one of claims 1-5, characterized in that, The gas-liquid treatment device further comprises a control device connected with the odor treatment device and the leachate treatment device, and used for controlling the odor treatment device and the leachate treatment device.

7. A waste transfer station characterised in that, The waste transfer station comprises an upper space and a lower space, the lower space is located below the upper space, the upper space contains the odor treatment device of the gas-liquid treatment device, and the lower space contains the leachate treatment device of the gas-liquid treatment device.

8. A gas-liquid treatment method for treating odors and leachate, characterized by, The waste transfer station comprises: The odor generated by the waste is input into the odor treatment device for treatment, and the odor generated in the process of treating the leachate is input into the odor treatment device for treatment; The leachate generated by the waste is input into the leachate treatment device for treatment, and the liquid generated in the process of treating the odor is input into the leachate treatment device for treatment; the liquid generated in the process of treating the odor comprises alkaline waste liquid, and the alkaline waste liquid is added into the coagulation sedimentation treatment unit (201) of the leachate treatment device to provide alkalinity.

9. The gas-liquid treatment method according to claim 8, wherein The gas-liquid treatment method further comprises: The odor is sequentially subjected to spray treatment, demisting treatment, and deodorization treatment; and / or, The leachate is sequentially subjected to coagulation sedimentation treatment, coagulation air flotation treatment, advanced oxidation treatment, anoxic treatment, aerobic treatment, and MBR treatment.

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