Water-seal-type clean energy utilizing device formed in inspection manhole

Abstract

The invention discloses a water-seal-type clean energy utilizing device formed in an inspection manhole. The water-seal-type clean energy utilizing device comprises a water seal structure and a biogasrecycling structure, wherein the water seal structure and the biogas recycling structure are arranged above the inspection manhole, the water seal structure comprises a water seal groove, and the water seal groove is a water groove in a homocentrically square shape, and is composed of a water seal groove inner wall, a water seal groove bottom and a water seal groove outer wall; the biogas recycling structure comprises a biogas collecting cover; the biogas collecting cover is connected with the water seal groove inner wall, and the water seal groove outer wall is higher than the top of the biogas collecting cover. The water-seal-type clean energy utilizing device has the advantages that features of the inspection manhole are sufficiently utilized, the maintenance space of an anaerobic poolbody is saved, the position advantages of the energy recycling device and inspection manhole are combined, clean energy gas is conveniently recycled and utilized, and the sealing effect of odor prevention and odor removal is also achieved.

Description

technical field [0001] The invention relates to the field of recovery and utilization of biogas resources in anaerobic fermentation ponds in a landfill leachate treatment process, in particular to a water-sealed clean energy utilization device arranged on a maintenance manhole. Background technique [0002] Landfill leachate, also known as leachate, is a high-concentration organic wastewater with high COD value, high ammonia nitrogen, and complex components. It contains high potential value for energy utilization. In order to effectively reduce the COD value in leachate and convert organic matter into renewable clean energy gas, the anaerobic fermentation process has become the mainstream process for degrading the COD value in landfill leachate. Anaerobic fermentation needs to build a matching anaerobic tank or anaerobic tank as a place for microbial anaerobic fermentation. The main component of the gas produced by microbial anaerobic fermentation is methane, followed by od...

AI Technical Summary

Problems solved by technology

This kind of anaerobic pool manhole is safe and reliable, and has good airtightness, but the construction is difficult, the cost is high, the manhole is troublesome to open, and frequent water injection is required

3. The structure of the flange type manhole is simple. It is mainly composed of flanges, prefabricated bolts, blind plates, and acid-resistant rubber. Both the flanges and the blind plates are made of steel plates. The bolts fix the flange, rubber, and blind plates. Its tightness mainly depends on the occlusal force of the bolts. This anaerobic pool manhole has a simple structure, is convenient for construction and construction, has low cost, and is easy to operate, but its shortcomings are also obvious. The connection between the flange and the top of the manhole wall is weak and easy Leakage, and the airtightness of the manhole also depends on the processing accuracy of the flange and blind plate. When the processing accuracy is low, the seal is not tight and easy to leak

When running for a long time, the rubber is easy to age and has limited pressure bearing capacity, so it needs to be replaced in time, and the scope of use is limited to low-pressure anaerobic pools

4. The principle of the self-water-sealed manhole structure is relatively simple. By extending the wall of the manhole, the side wall of the manhole is extended below the lowest point of the liquid level of the anaerobic tank. When the air pressure in the tank increases, the water level in the manhole rises and The liquid level in the anaerobic tank forms a liquid level difference to achieve water sealing. This device has a simple structure, but the manhole cannot recycle the biogas generated in the tank, which is not conducive to the discharge of biogas in the pool. When the manhole is opened, it will directly cause biogas Leakage, there are potential safety hazards; this maintenance manhole is generally suitable for horizontal pools with large plane dimensions

It utilizes the principle of water-sealed U-shaped pipes and is applied to the sewer connection structure, which reduces the overflow of gas in the drainage pipe. Its basic device can only be simply applied to the field of sewer connection structures, which has great limitations

Images