7 results about "Landfill gas" patented technology

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 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.

This invention relates to a method for the co-utilization of existing landfill waste and landfill gas to produce renewable methanol. RDF (Regenerative Thermal Deposition Facility) is pretreated and then purified into high-temperature syngas through pyrolysis, plasma gasification, desulfurization, and steam reforming. This purified syngas is mixed with steam-reformed landfill gas and green hydrogen obtained from water electrolysis, and the ratio is adjusted to obtain a methanol reaction feedstock gas satisfying [H2 / (2CO+3CO2)=0.9-1.1]. The feedstock gas is then used to produce methanol through a methanol synthesis reaction. Under a recycle ratio of 0.6-0.8, the hydrogen-to-carbon ratio of the syngas is 0.89-1.01, the methanol production exceeds 17 tons / hour, the system energy efficiency exceeds 75%, and the CO2 equivalent emission reduction rate is 82.5-91.7%. This invention achieves complementary carbon source utilization and hydrogen-to-carbon ratio through the parallel use of landfill waste and landfill gas as dual gas sources, improving system load stability and heat cascade utilization efficiency, and providing a new solution for the co-resource utilization of waste and the large-scale production of renewable methanol.

This invention relates to the field of landfill treatment technology and discloses a landfill gas collection device, including a filter cylinder, and further comprising: a top cylinder, which is fixedly connected to the top of the filter cylinder, and a gas guide pipe is fixedly connected inside the top cylinder, extending to the bottom of the filter cylinder and fixedly connected to a fine filter sleeve, the gas guide pipe located inside the filter cylinder having multiple sets of extraction holes, and a separation section provided on the gas guide pipe; and an extraction pipe, which is fixedly connected to the top end of the gas guide pipe, the extraction pipe having a deodorization section for treating the extracted landfill gas, and a piston section for extracting gas installed on the extraction pipe; this invention drives a friction roller by a drive motor, and uses magnetic coupling to drive a centrifugal disc to rotate at high speed, superimposing a strong mechanical rotational force field on the fluid vortex induced by the separation channel, forming a composite centrifugal force field, effectively throwing out liquid droplets in the landfill gas, significantly reducing the moisture content of the landfill gas, so as to facilitate subsequent storage or utilization of the landfill gas.

The present invention relates to a method and a system for producing hydrogen, said method comprising the steps of: (S1) refining a landfill gas to produce a first mixed gas; (S2) steam reforming said first mixed gas in a first reactor to produce a second mixed gas; (S3) separating said second mixed gas into a first stream comprising carbon dioxide and a second stream comprising hydrogen and carbon monoxide; (S4) flowing the first stream separated in step (S3) into a second reactor and converting it into carbon monoxide by reverse Boudouard reaction; (S5) mixing said second stream with the carbon monoxide converted in step (S4) to produce a third mixed gas; (S6) producing a synthesis gas from said third mixed gas by water gas shift reaction; and (S7) separating carbon dioxide from said synthesis gas to obtain hydrogen.

The application provides a landfill anti-settlement landfill gas collecting shaft, which comprises a collecting shaft, the collecting shaft extending longitudinally to the bottom surface of the landfill, a drainage pipe, the drainage pipe extending into the bottom of the collecting shaft from top to bottom, gravel filled between the drainage pipe and the collecting shaft, a stabilizing pipe, one end of the stabilizing pipe being detachably connected to the end of the drainage pipe extending out of the covering surface, the other end of the stabilizing pipe extending into the covering surface through bending and corresponding to the pre-buried collecting shaft connecting pipe, and rammed clay, the collecting shaft being sealed by the rammed clay at the wellhead of the collecting shaft. The settlement deformation stress of the stack can be absorbed by the energy dissipation of the gravel, the stress can be uniformly transmitted, and the drainage pipe is prevented from being damaged by the settlement stress; the two ends of the stabilizing pipe are connected through the corrugated silica gel pipe, and when the stack is unevenly settled, reliable connection between the collecting pipe and the shaft can be ensured, and the structural function is normally and stably maintained.