Waste gas resource recycling system for sewage station

Abstract

The utility model relates to a waste gas resource recycling system for a sewage station. The waste gas resource recycling system comprises a biological washing tower, an alkali liquor washing tower arranged on one side of the biological washing tower, an overflow pipe for adsorbing a nitrogen source in waste gas, a probe for detecting the content of washing liquid nitrogen, a sewage discharge pipe for discharging sewage and a waste water well for collecting sewage, the upper surface of the biological washing tower is fixedly connected with the lower surface of the alkali liquor washing tower; the overflow pipe is arranged at the upper part of the biological washing tower; the probe is arranged on the alkali liquor washing tower; the blow-off pipe is connected to the bottom of the alkali liquor washing tower; the waste water well is communicated with the blow-off pipe; and the overflow pipe is connected into the aeration tank. The problems that a recycling system is high in cost, complex and difficult to maintain, and a papermaking nitrogen source is difficult to recycle are solved.

Description

Technical Field

[0001] This utility model relates to the field of waste gas recovery and utilization, and in particular to a waste gas resource recovery and utilization system for sewage treatment plants. Background Technology

[0002] In existing technologies, the biological treatment process of papermaking wastewater often requires the supplementation of abundant nitrogen nutrients to achieve a COD:N ratio of 350:5. The large volume of wastewater generated in papermaking also increases the cost of urea. Exploring pollutants within the system and turning waste into resources is one effective approach. Wastewater treatment processes generate large amounts of ammonia, such as in anaerobic ponds, anaerobic tower effluent, and sludge dewatering workshops. Ammonia contains abundant nitrogen nutrients, which can be collected by covering and absorbing it through spraying in each unit, converting it into easily absorbed ammonium salts. Long-term monitoring and testing have shown that this nitrogen nutrient content is sufficient to meet the needs of the wastewater system; however, current recycling systems are costly, complex, and difficult to maintain, hindering the realization of nitrogen source recycling in papermaking. Utility Model Content

[0003] This application provides a wastewater treatment plant exhaust gas resource recovery and utilization system, which solves the problems of high cost, system complexity, difficult maintenance, and difficulty in realizing the recycling of nitrogen sources in papermaking in the prior art.

[0004] The technical solutions adopted in the embodiments of this application are as follows.

[0005] A wastewater treatment plant exhaust gas resource recovery and utilization system includes a biological scrubbing tower, an alkaline scrubbing tower disposed on one side of the biological scrubbing tower, an overflow pipe for adsorbing nitrogen sources in the exhaust gas, a probe for detecting the nitrogen content of the scrubbing liquid, a sewage discharge pipe for discharging wastewater, and a wastewater well for collecting wastewater; the upper surface of the biological scrubbing tower is fixedly connected to the lower surface of the alkaline scrubbing tower; the overflow pipe is disposed at the upper part of the biological scrubbing tower; the probe is disposed on the alkaline scrubbing tower; the sewage discharge pipe is connected to the bottom of the alkaline scrubbing tower; the wastewater well is connected to the sewage discharge pipe; and the overflow pipe is connected to an aeration tank.

[0006] As a further improvement to the above technical solution: an automatic sewage discharge valve is installed on the sewage pipe.

[0007] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0008] 1. Due to the adoption of a main exhaust gas pipe, which collects exhaust gases from all odorous points in the wastewater treatment plant, the biological scrubbing tower is used for activated sludge spraying. An overflow pipe is fixedly connected to the upper surface of the biological scrubbing tower, directly connecting to the aeration tank. The connecting pipe penetrates the upper surface of the terminal alkaline scrubbing tower. An online nitrogen detection device is installed in the spray zone tank at the bottom of the alkaline scrubbing tower. A drain pipe with an automatic drain valve is installed at the bottom of the alkaline scrubbing tower, extending into the collection well. All electrical components mentioned in this document are connected to an external main controller and 220V AC mains power. The main controller can also function as a computer, etc. The system utilizes conventionally known equipment for control. In summary, this wastewater treatment plant's waste gas resource recovery and utilization system, through the installation of a biological scrubbing tower and overflow pipe, provides abundant nutrients for aerobic bacteria by absorbing and decomposing ammonia through activated sludge. This, along with the alkaline scrubbing tower, online nitrogen detection equipment, sewage pipe, automatic sewage valve, and collection well, forms a complete internal nitrogen replenishment device. The system automatically detects nitrogen content within the tower and controls wastewater discharge, improving the overall system's operational stability and achieving the goals of reduced wastewater operating costs, stable performance, system simplicity, and thorough reaction without secondary pollution. Attached Figure Description

[0009] Figure 1 This is a top view of the waste gas resource recovery and utilization system of the wastewater treatment plant in this utility model.

[0010] Figure 2 This is a side view of the waste gas resource recovery and utilization system of the wastewater treatment plant in this utility model.

[0011] In the diagram: 1. Biological scrubbing tower; 2. Alkaline scrubbing tower; 3. Overflow pipe; 4. Aeration tank; 5. Probe; 6. Sewage pipe; 7. Automatic sewage valve; 8. Wastewater well. Detailed Implementation

[0012] This application provides a wastewater treatment plant exhaust gas resource recovery and utilization system, which solves the problems of high cost, system complexity, difficult maintenance, and difficulty in realizing the recycling of nitrogen sources in papermaking in the prior art.

[0013] The technical solution in this application embodiment is to solve the above problems, and the overall idea is as follows:

[0014] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0015] A wastewater treatment plant exhaust gas resource recovery and utilization system includes a biological scrubbing tower 1, an alkaline scrubbing tower 2 installed on one side of the biological scrubbing tower 1, an overflow pipe 3 for adsorbing nitrogen sources in the exhaust gas, a probe 5 for detecting the nitrogen content of the scrubbing liquid, a sewage discharge pipe 6 for discharging wastewater, and a wastewater well 8 for collecting wastewater. The upper surface of the biological scrubbing tower 1 is fixedly connected to the lower surface of the alkaline scrubbing tower 2. The overflow pipe 3 is installed at the upper part of the biological scrubbing tower 1. The probe 5 is installed on the alkaline scrubbing tower 2. The sewage discharge pipe 6 is connected to the bottom of the alkaline scrubbing tower 2. The wastewater well 8 is connected to the sewage discharge pipe 6. The overflow pipe 3 is connected to the aeration tank 4.

[0016] An automatic drain valve 7 is installed on the drain pipe 6.

[0017] The waste gas main pipe collects waste gas from all odorous points in the wastewater treatment plant. Biological scrubbing tower 1 is used for activated sludge spraying. An overflow pipe 3 is fixedly connected to the upper surface of biological scrubbing tower 1, directly connecting to the aeration tank 4. The connecting pipe penetrates the upper surface of the terminal alkaline scrubbing tower 2. An online nitrogen detection device is installed in the spray area tank at the bottom of alkaline scrubbing tower 2. A sewage discharge pipe 6 and an automatic sewage discharge valve 7 are installed at the bottom of alkaline scrubbing tower 2, extending into the collection well. All electrical components mentioned in this document are connected to an external main controller and 220V AC mains power. The main controller can be a computer or other conventionally known control device. In summary, this wastewater treatment plant waste gas resource recovery and utilization system, through the biological scrubbing tower 1 and overflow pipe 3, provides rich nutrients for aerobic bacteria by absorbing and decomposing ammonia through activated sludge.

[0018] Because a main exhaust pipe is used, it collects exhaust gases from all odorous points in the wastewater treatment plant. Biological scrubbing tower 1 is used for activated sludge spraying. An overflow pipe 3 is fixedly connected to the upper surface of biological scrubbing tower 1. Overflow pipe 3 is a continuous overflow pipe for activated sludge that adsorbs nitrogen sources from the exhaust gas. Overflow pipe 3 is directly connected to the aeration tank 4. The connecting pipe penetrates the upper surface of the terminal alkaline scrubbing tower 2. An online nitrogen detection device is installed in the spray zone tank at the bottom of alkaline scrubbing tower 2. A drain pipe 6 and an automatic drain valve 7 are installed at the bottom of alkaline scrubbing tower 2, extending into the collection well. All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. Furthermore, the main controller can be a conventional known device such as a computer for control. In summary, this wastewater treatment plant exhaust gas resource recovery and utilization system, through the installation of a biological scrubbing tower 1 and overflow pipe 3, provides rich nutrients for aerobic bacteria by absorbing and decomposing ammonia through activated sludge. This enables the alkaline scrubbing tower, online nitrogen detection equipment, sewage pipe 6, automatic sewage valve 7, and collection well to form a complete internal nitrogen replenishment device. The system automatically detects the nitrogen content in the tower and controls the discharge of waste liquid, improving the overall system's operational stability and achieving the goals of reducing wastewater operating costs, ensuring stable performance, simplifying the system, and ensuring thorough reaction without secondary pollution.

[0019] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the present invention.

[0020] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A sewage station waste gas resource recycling system, characterized in that, It includes biological washing tower (1), lye washing tower (2) arranged on one side of the biological washing tower (1), overflow pipe (3) for adsorbing nitrogen source in waste gas, probe (5) for detecting nitrogen content of washing liquid, blowdown pipe (6) for blowdown and waste water well (8) for collecting sewage, the upper surface of the biological washing tower (1) is fixedly connected with the lower surface of the lye washing tower (2), the overflow pipe (3) is arranged on the upper part of the biological washing tower (1), the probe (5) is arranged on the lye washing tower (2), the blowdown pipe (6) is connected at the bottom of the lye washing tower (2), the waste water well (8) is communicated with the blowdown pipe (6), and the overflow pipe (3) is connected to the aeration tank (4).

2. The system for exhaust gas resource recovery of a sewage station according to claim 1, characterized in that, An automatic blowdown valve (7) is arranged on the blowdown pipe (6).

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