71 results about "Landfill gas" patented technology

Devices and techniques related to landfill gas extraction are disclosed. A technique for controlling extraction of landfill gas from a landfill through a gas extraction system is described. The method may include measuring a plurality of values indicating conditions associated with the landfill; computing, based at least in part on the plurality of values and on a model of the landfill, a predicted future state of the landfill; determining, based at least in part on the predicted future state of the landfill, one or more control parameters for one or more respective control devices configured to control operation of the gas extraction system; applying the one or more control parameters to the one or more respective control, and with 10 the one or more control devices, controlling extraction of the landfill gas from the landfill based, at least in part, on the one or more respective control parameters.

The utility model provides a treatment system for a refuse landfill, which comprises a plurality of repair wells and a plurality of extraction wells arranged on the refuse landfill, and an aerobic aeration, liquid phase and gas phase extraction system connected with the repair wells and the extraction wells, the aerobic aeration and liquid phase and gas phase extraction system comprises air blasting equipment, moisture and nutrient substance blending equipment, landfill gas extraction equipment and leachate extraction equipment, the air blasting equipment is connected with the repair well, and an inlet connected with the moisture and nutrient substance blending equipment is formed in the air blasting equipment; and the landfill gas extraction equipment and the leachate extraction equipment are connected with the extraction well. According to the utility model, comprehensive treatment of the refuse landfill is realized, and the system is not only suitable for in-situ treatment of stock refuse without excavation and departure, but also suitable for stabilization pretreatment of stock refuse excavation, departure and ex-situ treatment.

A system may include a flow valve coupled to a gas inlet of a landfill gas system and a pump coupled to the flow valve and configured to draw gas from the landfill gas system via the gas inlet. The system may further include an oxygen sensor comprising at least one laser configured to detect oxygen concentration in the gas, a carbon dioxide sensor comprising at least one infrared light source configured to detect carbon dioxide concentration in the gas, and / or one or more chemical sensors configured to sense concentrations of a respective one or more chemicals in the gas. A microprocessor may determine sensed data including at least the oxygen concentration, the carbon dioxide concentration, concentrations of the one or more chemicals, the static pressure, the atmospheric pressure, and / or a differential pressure, and communicate the sensed data to a mobile control device.

The invention discloses a metal-doped modified zeolite molecular sieve adsorbent as well as a preparation method and application thereof. The metal-doped modified zeolite molecular sieve adsorbent comprises a carrier and an active metal component loaded on the carrier, the carrier is a mordenite molecular sieve; the active metal components comprise at least two of Ca, Mg, Ti, Fe, Ni, Co, Cu, Zn, Na and Ag; in the adsorbent, the loading capacity of the active metal component is 0.1%-15%. The adsorbent provided by the invention has good separation performance on CH4 / CO2, CH4 / N2, CO2 / N2 and CH4 / CO2 / N2 mixed gas separation systems, has the advantages of simple synthesis method, strong hydrothermal stability, high selectivity and the like, and can meet the requirements of CH4 purification in unconventional natural gas such as landfill gas, sewage treatment methane gas, agricultural and breeding biogas, coal bed gas, shale gas and shallow biogas, and the like. And the requirements of high-concentration natural gas denitrification, CO2 capture and other scenes can be met.

An apparatus for sampling landfill gas from a landfill flowing through a pipe. The apparatus may comprise: an enclosure configured to receive a section of the pipe; a gas sampling port in the section of the pipe; at least one sensor device disposed in a region of the enclosure, the at least one sensor being coupled to the section of the pipe through the gas sampling port; and thermal insulation positioned to retain heat from the section of the pipe in the region of the enclosure. A method of operating a landfill gas recovery system. The method may comprise: flowing gas from a well riser pipe through a sampling subsystem to a collection system; and heating a portion of the sampling subsystem with the gas flowing from the well riser pipe to the collection system.

A control system for controlling extraction of landfill gas from a landfill via a gas extraction system comprising well piping, the landfill gas having a first temperature when extracted, the control system comprising: a gas composition chamber coupled to the well piping and comprising at least one sensor configured to measure one or more characteristics of a landfill gas sample in the gas composition chamber; a temperature control mechanism configured to heat the landfill gas sample in the gas composition chamber to a second temperature at least a threshold amount greater than the first temperature; and a controller configured to control the at least one sensor to measure the one or more characteristics of the landfill gas sample in the gas composition chamber when a temperature of the landfill gas sample in the gas composition chamber is at least the threshold amount greater than the first temperature.

The invention relates to the technical field of refuse landfills, and discloses an aerobic biological enhanced degradation and percolate cyclic recharge co-treatment process, which comprises the steps of complex microbial inoculant screening, microbial metabolism regulation and control, microbial metabolism environment optimization, microbial inoculant staged addition, dynamic recharge proportion regulation and control, percolate pretreatment and landfill gas resource utilization. Through the treatment process, the aerobic biological enhanced degradation effect of the landfill can be improved, and the yield of the leachate is reduced.

The invention provides a multifunctional experimental system for simulating migration and transformation of micro-plastics in a landfill environment, comprising: a columnar migration device filled with a landfill soil medium, the bottom of which is provided with a liquid inlet interface and a gas-liquid interface, and the top of which is provided with a liquid outlet; the liquid inlet system is connected to the liquid inlet connector through a first peristaltic pump; the temperature control module comprises a flexible heating film arranged around the outer wall of the columnar migration device and a temperature controller, and the flexible heating film is connected with the temperature controller through a temperature control connector, an integrated heating element and a wire; the micro-nano bubble generating device comprises a CH4 gas cylinder, a pressure reducing valve and a micro-nano bubble generator which are connected in sequence, a micro-bubble aeration head is arranged on the micro-nano bubble generator, the micro-bubble aeration head is partially and directly immersed in a preset water body, a high-dispersity bubble water solution is generated under a gas-liquid interface, and the CH4 gas cylinder is used for generating CH4 gas. The gas is quantitatively conveyed to the bottom of the columnar migration device through a second peristaltic pump connected to the downstream, and the dissolution of the landfill gas in the pore water and the gas-liquid interface action are simulated.

A dielectric barrier discharge system, employed to reform / remove organosilicon contaminants off a carrier stream to provide a sustainable, end-of-technology way of siloxane removal that will ensure siloxane does not re-enter the carrier stream, as well as generates useful end-products.

The invention relates to the technical field of environment-friendly treatment, and particularly discloses an intelligent solid waste environment-friendly treatment system and method.According to the intelligent solid waste environment-friendly treatment system and method, municipal waste is subjected to landfill, leachate generated in the biodegradation process of the municipal waste is collected, and meanwhile key state parameters such as the pH value of the leachate and landfill gas components in the degradation process are monitored in real time; a deep learning algorithm is introduced to carry out sequential evolution mode analysis on multi-dimensional key state parameters in the degradation process, meanwhile, the current biodegradation reaction stage is self-adaptively recognized in combination with the current reacted time, and then an adaptive recharge leachate target pH value is determined based on the recognition result of the reaction stage. And adjusting the pH value of the collected leachate according to the pH value of the collected leachate, and recharging the adjusted leachate into the landfill area to dynamically adjust the pH value environment of the leachate. According to the method, the optimal biochemical environment can be provided for microbial flora in different stages through intelligent sensing and staged regulation and control of the garbage degradation process, so that the garbage degradation efficiency and the gas production rate are improved.

The invention relates to the technical field of underground engineering safety and environment, and discloses a gas guide well non-combustible filler gradient filling and covering layer gas absorption construction method which comprises the steps that a core gas channel inner pipe with an inverted drainage bell jar structure at the lower end is arranged, an annular cavity formed between the core gas channel inner pipe and a well wall is filled with inert aggregate, and liquid is injected; according to the invention, a dynamic liquid seal ring capable of being self-adaptive to geological sedimentation is formed, and meanwhile, a heat pipe is arranged to establish an anti-freezing regulation and control loop utilizing waste heat of landfill gas, so that the problem of gas side leakage caused by non-uniform sedimentation of a filling body of a traditional solid filler is avoided through a mode of constructing the dynamic liquid seal ring; and the drainage bell jar structure is driven by the energy of the landfill gas to realize self-cleaning, so that the solid-phase deposition problem inevitably generated in a liquid-phase purification scheme is converted into internal circulation without energy consumption, and the gas guide well system can realize long-term self-maintenance and stable operation in a dynamic geological environment.

The invention provides a water and gas guiding method for a refuse landfill and application of the water and gas guiding method. According to the water and gas guiding method, water and gas are guided through a guiding and discharging pipe arranged on the working face of the refuse landfill, so that the blocking effect of garbage such as plastic on landfill leachate and landfill gas can be reduced; water and gas are uniformly and fully guided for the garbage heap at the working face, complex arrangement of a pumping and discharging vertical shaft and the like in the prior art can be avoided, separation and collection of the landfill leachate and the landfill gas can be achieved through the guiding and discharging pipe, and the device has the advantages of being low in cost, convenient to apply and popularize and the like.

The utility model discloses a gas guide device suitable for garbage disposal, and relates to the technical field of garbage landfills. The device comprises an air guide pipe and a base, a pumping and discharging assembly is arranged between the air guide pipe and the base, and a filtering assembly is arranged at the top end of the base. External air is pressurized and fed into the wind pressure pipe, the pressurized air enters the bottom of a garbage pile through the air guide pipe and extrudes landfill gas upwards, meanwhile, negative pressure is formed in the exhaust pipe, the rising landfill gas enters the exhaust pipe from the air inlet, and therefore the situation that the landfill gas extraction efficiency is low can be avoided; therefore, the purpose of improving the efficiency is achieved; the landfill gas is fed into the filter box through the gas inlet pipe and moved to the position between the two partition plates, meanwhile, the spraying head sprays out adsorption liquid in a mist shape, the adsorption liquid makes contact with the landfill gas to adsorb peculiar smell, the adsorption liquid penetrates through the filter box to filter gas particles, and therefore the peculiar smell in the landfill gas can be prevented from affecting the environment, and the purification purpose is achieved.

The application discloses a landfill gas collecting and filtering device, which comprises a fermentation chamber, a collecting pipeline assembly, multiple bend pipes and a landfill gas collecting tank; the collecting pipeline assembly is arranged below the fermentation chamber and is fixed in the fermentation chamber through a pipeline support seat; a conveying pipeline is connected with the collecting pipeline assembly through the fermentation chamber; the multiple bend pipes are connected with the other end of the conveying pipeline; and the landfill gas collecting tank is connected with the other end of the multiple bend pipes; the collecting pipeline assembly comprises an installation pipeline, a collecting pipeline and a booster pump assembly; a partition plate is arranged in the installation pipeline; and the installation pipeline is divided into a booster pump assembly installation cavity and a collecting pipeline installation cavity through the partition plate. Through the arrangement of the booster pump assembly, the collecting pipeline is pressurized, so that the airflow passes through the small holes and the grid holes, the small holes and the grid holes are cleaned, the small holes and the grid holes are prevented from being closed and blocked, and the landfill gas can be better collected.

The invention relates to the technical field of environmental engineering, and discloses an intelligent system and method for condensate separation of an exhaust well of a landfill, and the intelligent system is composed of a Z-shaped condensation pipe, a water collecting pipe, an exhaust fan, a water level monitoring device, a hygrothermograph A, a hygrothermograph B and a central control system. The Z-shaped condensation pipe is connected to the rear end of the gas extraction well pipe and is composed of a front pipe, a middle pipe and a rear pipe. And the lower end of the water collecting pipe is connected with a drain pipe through a drain valve. The exhaust fan is communicated with the condensation pipe rear pipe through an exhaust pipeline, and a branch pipe valve is arranged at the tail end of the rear pipe. The water level monitoring device monitors the liquid level of the water collecting pipe, the hygrothermometers A and B monitor the temperature and humidity of landfill in the front pipe and the rear pipe, and the central control system controls the branch pipe valves, the exhaust fan and the drainage valve according to signals of all the devices, so that condensate is intelligently separated. The central control system intelligently adjusts the air exhaust rate and drainage operation according to data, automatic control is achieved in the whole process, personal errors and labor intensity are reduced, water vapor condensation is effectively promoted, and the condensate separation efficiency is improved.

Systems and methods for controlling extraction of landfill gas from a landfill via a gas extraction system comprising a plurality of wells are provided herein. In some embodiments, the method comprises obtaining a concentration of a greenhouse gas measured a distance above a surface of a region comprising the plurality of wells; determining whether the measure of the concentration of the greenhouse gas is greater than a first threshold; and in response to determining that the measure of the concentration of the greenhouse gas is greater than the first threshold, increasing a flow rate of landfill gas being extracted from at least one well of the plurality of wells.

The application discloses a kind of turbine flowmeter monitoring module, including gas well, gas analyzer, flow monitoring regulating device, gas pipeline, control center and internal combustion generator set;The flow monitoring regulating device includes turbine flowmeter and signal end;The turbine flowmeter includes shell, guide vane, impeller, rotating plate;The fixed component is installed in the guide vane near one end of impeller;The data of the component content of landfill gas collected by gas analyzer is received by control center, according to the received data and the flow rate information of landfill gas in gas pipeline obtained by signal end, control flow monitoring regulating device, adjust the extraction speed of landfill gas, avoid the occurrence of dead well phenomenon;The two ends of impeller are supported by sleeve, and the impeller is axially positioned by the ball, when the impeller is damaged, the rotating plate is opened, and the impeller and the guide vane can be separated by sliding sleeve, which is convenient for maintaining the impeller.

A portable monitor used to measure landfill gas, landfill well parameters, and / or gas from a well, biogas facility, subterranean location, and any other testing location. The portable fluid monitor is particularly useful in measuring gas pressures and compositions of gases.

The landfill gas extraction post-treatment device comprises a filter box, a mounting plate is fixedly connected to the interior of the filter box, a filter screen is detachably connected to the interior of the mounting plate, and a fixing plate is fixedly connected to the side, close to the mounting plate, of the interior of the filter box. According to the landfill gas extraction post-treatment device for the refuse landfill, a servo motor drives a rotating plate to rotate back and forth through a second gear and an outer gear ring, the rotating plate extrudes a sliding rod through a first sliding groove, the sliding rod drives a movable frame to move back and forth, and a cleaning plate on the movable frame sweeps a filter screen, so that impurities adhering to the filter screen are cleaned; under the action of a rack, a first gear on a sliding rod rotates all the time, a sliding plate is driven to move back and forth through a connecting rod, the sliding plate drives a cleaning plate to move back and forth through a movable plate, the cleaning effect of the cleaning plate is improved, and meanwhile cleaned impurities are prevented from being attached to the cleaning plate.

The present invention discloses a landfill air pressure monitoring device and a method for monitoring the air pressure below the leachate level, which relates to the field of underground structures. By detecting the leachate level in the landfill and the differential water level in the inner pipe, and combining the principle of pressure difference, the air pressure at the bottom of the inner pipe is measured, that is, the air pressure at the depth where the inner pipe is located in the landfill waste landfill heap. Moreover, by detecting the air pressure based on the leachate level and the principle of pressure difference, since the leachate can fully penetrate in the waste heap, the final detection result can fully reflect the air pressure at a certain depth in the heap, thereby improving the air pressure detection range and detection effect; the inner pipe is driven to move up and down by a lifting drive assembly to adjust the depth of the bottom of the inner pipe inserted into the landfill, so as to detect the air pressure at different depth positions in the landfill, further improving the air pressure detection range and detection effect.

The utility model relates to the technical field of sanitary landfill of household garbage, in particular to a landfill side slope landfill gas guiding and discharging system which comprises a gas collecting well, a gas guiding blind ditch and a connecting blind ditch, and the center of the gas collecting well is fixedly connected with an HDPE gas guiding pipe. The gas guide blind ditch is arranged in the irregular area, the side slope area or the corner area of the landfill, and the connecting blind ditch is connected with the nearest gas collecting well, so that the influence of the gradient of the side slope area on the drilling depth of the conventional gas collecting well is eliminated, and the gas guide effect of the landfill gas in the side slope area is greatly enhanced; meanwhile, the defect that the coverage range of a conventional gas collecting well is limited can be overcome, the gas guide blind ditches can be flexibly arranged according to on-site topography, slope gradient changes and the like, the guide and drainage coverage range is large, the whole device is easy to construct and reliable in structure, and the risk that the conventional gas collecting well damages a slope bottom anti-seepage structure is reduced; and safe and stable operation of the landfill gas guiding and discharging system is facilitated.

The present invention relates to a lithium and manganese modified SAPO molecular sieve, its preparation method and application, belonging to the technical field of adsorbents. The technical problem solved by the present invention is to provide a preparation method of a lithium and manganese modified SAPO molecular sieve. The method comprises the following steps: after impregnating the SAPO molecular sieve with a salt solution, performing solid-liquid separation, drying the solid and then calcining it to obtain the lithium and manganese modified SAPO molecular sieve. The present invention uses specific lithium salt and manganese salt solutions to impregnate and modify the SAPO molecular sieve, and successfully prepares the lithium and manganese modified SAPO molecular sieve. Its preparation method is simple and controllable, with low energy consumption and low cost. Moreover, the obtained modified molecular sieve can separate a nitrogen and methane mixed system, with an extremely low adsorption amount of methane, a large separation ratio of nitrogen to methane, and can also be applied to purify methane in coalbed methane, oilfield gas or landfill gas.

The application relates to the technical field of underground engineering safety and environment, and discloses a gradient filling and covering layer gas absorption construction method for a gas guide well non-combustible filler, which comprises the following steps: arranging a core gas channel inner tube with an inverted drainage bell structure at the lower end, filling inert aggregates in the annular cavity formed between the core gas channel inner tube and the well wall, and injecting liquid to form a dynamic liquid seal ring which can self-adapt to geological subsidence, and arranging a heat pipe to establish a freeze-proof regulation loop using the residual heat of landfill gas. The application avoids the gas side leakage problem caused by the uneven settlement of traditional solid fillers by constructing a dynamic liquid seal ring, and realizes self-cleaning by utilizing the energy of landfill gas to drive the drainage bell structure, so that the solid phase deposition problem inevitably caused in the liquid phase purification scheme is converted into an internal circulation without energy consumption, and the gas guide well system can realize long-term self-maintenance and stable operation in a dynamic geological environment.

The present invention relates to a method of removing a landfill residue that includes (a) forming a treatment composition that includes, (i) an acid functional material comprising at least one of carboxylic acid functional materials, phosphoric acid functional materials, phosphonic acid functional materials, or salts thereof, (ii) water, (iii) optionally an oxidizer including a reactive oxygen, and (iv) optionally a surfactant. The method further includes (b) contacting together said treatment composition and said landfill residue, thereby forming a modified treatment composition including the landfill residue, and (c) removing the modified treatment composition. The landfill residue is selected from a landfill gas extraction residue and a landfill leachate collection residue, and the landfill residue includes an organic substance and optionally a scale-forming salt. The present invention also relates to a treatment composition including the acid functional material, and the oxidizer.

The utility model discloses a landfill gas pretreatment purification mixed gas supply system which comprises a pretreatment system, a purification device, a gas mixer, a plurality of biogas generator sets, a carbon dioxide separation device and a carbon dioxide storage tank which are of a skid-mounted integrated structure. A purification device and a gas mixer are sequentially arranged on a gas outlet header pipe of the pretreatment system, gas inlet branch pipes of all the biogas generator sets are in parallel confluence connection with the tail end of the gas outlet header pipe, and tail gas straight pipes of all the biogas generator sets are in parallel confluence connection with a carbon dioxide separation device and a storage tank. Landfill gas is purified into high-concentration landfill gas through the purification device, and the high-concentration landfill gas and carbon dioxide gas stored in the storage tank are mixed through the gas mixer and then enter the gas inlet branch pipe of each biogas generator set. According to the system, landfill gas is purified and mixed with non-fuel gas to obtain high-concentration landfill gas to be supplied to biogas for power generation, the power generation efficiency is improved, the economic benefit is increased, and the service life of a generator set is prolonged.

The application provides a lubricating oil composition for a gas engine, an additive mother liquor, an oil change cycle determination method and a gas engine system comprising the same, and relates to the technical field of lubricating oil.The additive mother liquor takes a III type base oil or a poly-alpha-olefin base oil as a carrier, and comprises a detergent, a dispersant, an anti-wear and extreme pressure agent, an antioxidant, a rust-preventing and corrosion-inhibiting agent, an ash-free friction modifier, a defoaming agent and an auxiliary additive.The additive mother liquor of the application can significantly improve the oxidation resistance and nitration resistance of the lubricating oil, effectively control high-temperature deposition, wear and corrosion when being applied to the lubricating oil for the gas engine through the synergistic compounding of the above-mentioned raw materials.Meanwhile, the lubricating oil composition for the gas engine of the application is suitable for compressed natural gas, liquefied natural gas, biogas, landfill gas or hydrogen-doped compressed natural gas engines and fixed gas power generating sets.

The present invention provides a lithium-cobalt modified titanium silicon molecular sieve and its preparation method and application, belonging to the field of adsorbent technology. The specific steps of the preparation method of the present invention are as follows: (1) preparing a salt solution: mixing lithium salt, cobalt salt and deionized water to obtain a salt solution; (2) mixing the ground titanium silicon molecular sieve with the salt solution in step (1), then filtering and separating, drying the filter residue obtained after separation, and finally roasting to obtain a lithium-cobalt modified titanium silicon molecular sieve. The present invention successfully prepares a lithium-cobalt modified titanium silicon molecular sieve by impregnating and modifying a salt solution with a specific lithium salt and cobalt salt dosage ratio. The preparation method is simple and low in cost. The prepared molecular sieve is used to separate N2 and CH4 mixed gas, and the adsorption amount of CH4 is extremely low, which can achieve effective separation of N2 and CH4. The molecular sieve prepared by the present invention can also be used to purify CH4 from coalbed methane, oilfield gas or landfill gas.

An apparatus including: a housing configured for installation in a landfill; a differential pressure sensor and at least one gas sensor in the housing; and a first valve configured to control landfill gas (LFG) flow to the at least one gas sensor, wherein the first valve is configured to open when the differential pressure sensor detects a selected pressure difference or pressure difference change between the atmospheric air pressure and the LFG pressure.

The application discloses a regional recycling economy operation state monitoring and evaluation method and system based on an Internet of Things, relates to the field of data analysis, and comprises a collection module, a garbage recycling related information collection module is used for collecting target area garbage recycling related information, and the garbage recycling related information is counted; an analysis module is used for receiving the garbage recycling related information counted in the collection module, and analyzing the garbage treatment tendency based on the garbage recycling related information; the application collects multi-dimensional data such as garbage properties and weights accurately, constructs a treatment tendency model in combination with parameters such as moisture content, can scientifically judge the more suitable treatment path of garbage incineration or landfill, simultaneously introduces a methane production decay trend evaluation mechanism, relies on a matrix type deployed sensor to monitor the landfill gas production state in real time, combines a weight algorithm to dynamically evaluate the gas production health degree, and provides double data support for garbage allocation strategy.

A control system for controlling extraction of landfill gas, comprising: at least one sensor configured to measure one or more characteristics of landfill gas; at least one flow control mechanism disposed in well piping and configured to control flow of the landfill gas through the well piping; and at least one processor configured to: obtain a measured concentration of a first gas in landfill gas; determine whether the measured concentration of the first gas is either less than a first threshold concentration or greater than a second threshold concentration; when it is determined that the measured concentration is less than the first threshold concentration, control the at least one flow control mechanism to reduce flow rate of landfill gas; and when it is determined that the concentration is greater than the second threshold concentration, control the at least one flow control mechanism to increase the flow rate of landfill gas.