47results about How to "Reduce methane content" patented technology

The invention discloses a sewage treatment and purification integrated device for a municipal sewage pipe network, which comprises a main body component, a sewage filter component, a drive component, a pressurization component and an aeration component. 2. Outlet pipe, connecting column, filter box and rectangular piston pipe, and the reaction box is arranged obliquely. In the present invention, since the adjacent "several" characters on the rotating rod are opposed to each other, that is, the movement track of the piston inside the adjacent rectangular piston pipe is one up and one down, and the sewage discharged from the municipal sewage branch conduit can be introduced into the sewage due to the setting of the guide plate. The filter cavity on the side away from the sludge storage box, the sewage enters the funnel-shaped groove through the filter screen one by one, and the sludge on the filter screen is in the process of the piston plate moving up and down and under the action of gravity, so that the sludge is collected towards the sludge The tank moves on one side, and finally discharged into the sludge storage tank and then discharged through the sewage pipe, reducing the sludge production and subsequent treatment costs.

The invention discloses a method for treating organic wastewater with a two-phase anaerobic tubular membrane bioreactor. The method comprises the following steps of: adding anaerobic digested sludge into an up-flow complex acid-production reactor and a completely mixed methane-production reactor in an inoculating way; enabling organic wastewater to flow through all reaction chambers in the up-flow complex acid-production reactor in sequence and enter the completely mixed methane-production reactor, and adding wastewater into the completely mixed methane-production reactor by controlling the gas generation rate and the pH value; enabling a methane-phase mixed solution in the completely mixed methane-production reactor to scour the inner side of a tubular membrane component and flow back to the completely mixed methane-production reactor in a circulating way so as to be mixed hydraulically; separating the methane-phase mixed solution by using the membrane component to obtain effluent and methane gas; and collecting the methane gas at the methane gas outlet of the completely mixed methane-production reactor. The invention further discloses a device for implementing the method. The method and the device can be used for treating high-concentration organic wastewater so that the organic wastewater reaches the standard in a short process, and the method and the device can be also used for treating low-concentration organic wastewater so that the discharge of methane dissolved in effluent as a greenhouse gas can be reduced.

The invention discloses a gasifier of a fluidized bed and use thereof. The gasifier of the fluidized bed comprises a gasifier body, a synthesized gas outlet, a material input pipe, a gasifying agent nozzle, an auxiliary gasifying agent input pipe and a plasma torch which are positioned on the gasifier body, and the gasifier of the fluidized bed is used for gasifying ungasified material and residual carbon in ash for the second time. By virtue of the gasifier adopting the above technical scheme, the temperature inside the gasifier can be effectively raised, the coal type adaptation of the gasifier of the fluidized bed is widened, the content of effective ingredient in the synthesis gas is improved, the content of carbon dioxide and methane is reduced, the level of residual carbon in the ash is reduced, the carbon conversion rate and gasification efficiency are improved, the operation stability and reliability of the gasifier are improved. The gasifier of the fluidized bed provided in the invention has the advantages of wide coal type adaptation, high carbon conversion rate, high gasifying efficiency and reliable operation.

The invention belongs to the technical field of microbe electrochemistry and aims to provide a method for producing hydrogen by alkalescent microbe electrolysis. The method comprises steps of: (1) starting an electrolytic bath under a microbiological fuel cell mode: accessing a resistor in a closed-loop of a system and replacing a solution in the electrolytic bath when a voltage is low; continuing to replace until voltages at two ends of the resistor are higher than 500mV to finish anode starting; (2) producing hydrogen under a microbe electrolytic bath mode: replacing a cathode in the started electrolytic bath with stainless steel net or foamed nickel, keeping solution in the whole electrolytic bath in a anaerobic state and applying 0.4-0.8 V voltage at two ends of the cathode and the anode by using direct-current power supply and realizing hydrogen production of the electrolytic bath at 20-35 DEG C. The invention can effectively inhibit generation of methane, realize long time continuous operation or multiple batch operation and generate gas with low methane content; the method has a low cost and can obtain high hydrogen generation rate; utilization rate of organic matter under an alkalescent environment is increased, and hydrogen generation stability of the system is increased.

The invention relates to a method for separating and purifying CO from water gas by pressure swing adsorption. Raw material gas is sequentially subjected to a PSA-1 (Pressure Swing Adsorption) decarburization working procedure and a PSA-2 CO purification working procedure. Six adsorption beds ABCDEF of a primary adsorption tower T1 and seven adsorption beds ABCDEFG of a secondary adsorption towerT2 are mainly provided. Forward discharge gas recovered by the six beds of PSA-1 is circularly purified at the inlet of a raw material gas compressor, thereby reducing the loss of effective components in the decarburization working procedure; the content of methane in the process product gas generated by the seven beds of PSA-2 is decreased to 0; and the yield of the product CO is improved to be above 80%.

The invention discloses a two-stage PSA method for recovering C2+ from refinery dry gas according to concentration, which relates to the technical field of separating and recovery of in valuable substances in petrochemical tail gas. The method comprises a pretreatment process, a C2+ adsorption concentration process, an intermediate purifying process, and a C2+ adsorption refining process, wherein, the pre-treated refinery mixed dry gas is introduced into the CO2+ adsorption concentration process, then flowed non-adsorption phase gas is the adsorption exhaust gas, or directly taken as hydrogen (H2) product gas, or taken as fuel gas, or taken as raw material gas for extraction of hydrogen for output; the flowed adsorption phase gas forms the intermediate gas through the intermediate purifying process, and then is introduced into the C2+ adsorption refining process for refining, the flowed non-adsorption phase gas is taken as the raw material gas for mixing with the refinery mixed dry gas, a mixture is returned to the C2+ adsorption concentration process; the flowed adsorption phase gas has the C2+ concentration being more than 90-95% (a volume ratio), wherein the methane impurity concentration is less than 4%, the flowed adsorption phase gas is taken as the C2+ concentrate product gas for output, and the yield of C2+ is more than 90-95%.

The invention discloses a system for improving liquefied natural gas recovery rate and relates to the field of liquefied natural gas production. The system comprises a raw material gas conveying pipe, a compressor, a methanation reactor, a liquefied natural gas purification tower and pipelines, and the system is characterized by being further provided with a pressure swing adsorption device which is provided with a pressure swing adsorption tower, wherein the raw material gas conveying pipe is connected with the compressor, the compressor is connected with the methanation reactor, the methanation reactor is connected with the liquefied natural gas purification tower which is connected with the pressure swing adsorption tower, the pressure swing adsorption tower is connected with the raw material gas conveying pipe or the liquefied natural gas purification tower, and the devices are communicated by virtue of corresponding pipelines. The system disclosed by the invention is simple to operate and cost-saving, the energy consumption is reduced, and the recovery rate of the liquefied natural gas can reach over 99.8%.