An air pollution prevention device applied for a baby carriage includes a sealing cover, a filtration cleaner, a gas detection module and an intelligent control and process device. The sealing cover is hooded on the baby carriage for forming a sealed space. The filtration cleaner penetrates the sealing cover form the outside of the baby carriage for introducing an outside air into the sealed space of the baby carriage and discharging an air pollution source out of the sealed space. The gas detection module detects the air pollution source and outputs gas detection data. The intelligent control and process device receives and compares the gas detection data and controls an enablement of a gas guider of the filtration cleaner for filtering and exchanging the air pollution source in the sealed space so as to generate a clean air.

The invention concerns a system for roasting coffee beans comprising: a roasting apparatus (1), said apparatus producing smoke, anda smoke treating unit (2) configured to collect and treat smoke produced by the roasting apparatus, wherein: the roasting apparatus comprises a smoke outlet (11), andthe smoke treating unit comprises: a smoke inlet (21) configured to cooperate with the smoke outlet of the roasting apparatus, a smoke filtering sub-unit (22) comprising at least an active carbon filter (221), a smoke driver (23) configured to circulate smoke through the smoke treating unit from the smoke collecting device to an outlet (25) of the smoke treating unit, wherein the smoke treating unit (2) comprises an air inlet (24) configured to mix the smoke produced by the roasting apparatus (1) with ambient air before the smoke is circulated through the smoke filtering sub-unit (22).

Apparatus and methods are disclosed which are capable of being used to determine filtration efficiency of a filter body even in a clean state. Methods of determining a filtration efficiency of a filter including forcing an inlet flow comprised of a gas (such as air) flow into the inlet end of the filter at a set flow rate, introducing particles such as smoke particles into the inlet flow, and optically counting the number of particles entering and exiting the filter during a sampling event, such as with diffraction based optical particle counters positioned upstream and downstream of the filter. Preferably the gas flow is a soot-free flow stream which does not load the honeycomb filter body with contaminants that need to be removed or burned out. The filter body can thus remain in an essentially clean state even after testing its filtration efficiency.

A fiberbed mist collector and method of use for filtering gas emissions having contaminants, including one or more unwanted gases that are produced during an asphalt concrete production process. The fiberbed mist collector includes a housing, a pre-filter area for receiving gases, a transition area for receiving gas emissions from the pre-filter area, a primary filter area provided with one or more primary filters, a liquid collecting chamber configured to collect liquid waste material falling from the primary filter area, a housing outlet, and an exhaust stack that receives gas emissions from the housing. A pre-filter is located between the pre-filter area and the transition area for filtering out particulate matter that is entrained with the gas emissions. Condensing filters are provided in the primary filter area to condense at least a portion of the gas emissions. An acid-impregnated filter removes at least one non-condensing gas from the gas emissions.

An air-conditioning system is provided that may include a first air-processing apparatus, which includes a first inlet formed in a first surface thereof that extends perpendicular to a floor or a ceiling and a first outlet formed in a second surface thereof perpendicular to the first inlet and induces air introduced into the first inlet to exchange heat with refrigerant and to be discharged through the first outlet, and a second air-processing apparatus, which includes a second outlet formed therein so as to be open in a same direction as the first outlet and a second inlet formed therein so as to be open in a same direction as the first inlet. The air-conditioning system may be driven in a combined operation mode in which the first and second air-processing apparatuses operate simultaneously or an independent operation mode in which one of the first air-processing apparatus or the second air-processing apparatus operates.

An apparatus used with supplied power for treating air in an environment and method of use. A housing is mobile in the environment and has an intake and an exhaust. At least one prime mover is disposed in the housing and is operable to move the air in the environment through the housing from the intake to the exhaust. At least one permeable barrier is disposed in the housing and is configured to impede the moved air flow therethrough up to an impedance threshold. The permeable barrier is in electrical communication to the supplied power and is heated to a surface temperature.

The present disclosure relates to a filter module for filtering air of at least a part of a building or air from an exhaust air purification unit of a production process, wherein the filter module has a filter body, which filters the air flowing through from air accompanying substances, and at least one sensor with sensor electronics. The sensor is configured for measuring a value of an analysis parameter for the analysis of at least one of the air accompanying substances and of the air quality of the air. The filter body and the sensor are configured and arranged with respect to one another in the case of an air flow through the filter module, the value of the analysis parameter which is measured with the sensor corresponds to more than 90% of the value of the analysis parameter which is averaged over the entire air flow.

Embodiments herein relate to filtration systems that can pulse clean filter elements selectively, in specific patterns, to enhance cleaning efficacy. In an embodiment, a filtration system is included having a plurality of filter element mounts configured to retain filter elements, a compressed gas supply, and a plurality of valves in fluid communication with the compressed gas supply. The system further including a control circuit configured to control actuation of the plurality of valves. The system can operate in a first mode and a second mode. Wherein operating in a first mode includes opening valves according to a first valve actuation pattern and operating in a second mode includes opening valves according to a second valve actuation pattern. The system can be configured to periodically switch from the first mode to the second mode and compare the efficacy of the two modes. Other embodiments are also included herein.

A positive pressure control method of indoor air cleaning network mechanism system is provided and includes: providing a plurality of gas detectors; providing at least one indoor air pollution processing device; providing a networked cloud computing service device; receiving the carbon dioxide (CO2) pressure detection information and intelligently selecting to issue the control instruction by the networked cloud computing service device; comparing whether the pressure difference of the carbon dioxide (CO2) in the indoor field and the outdoor field reach the balance of zero pressure difference; and receiving the control instruction to control the actuation operation of the air guiding fan by the gas detectors inside the indoor air pollution processing device, wherein the internal circulation air pollution purification and the temperature and humidity adjustment of the indoor field are implemented continuously, whether the pressure difference of carbon dioxide (CO.sub.2) between the indoor field and the outdoor field is compared to reach the balance of zero pressure difference, the air guiding fan of the indoor air pollution processing device is controlled to adjust the speed reduction of the air guide volume, so that the instant detection of air pollution purification and the complete clean room treatment are realized, and the cleanliness of cleanroom grade is achieved.

A natural gas processing system is mounted on a mobile platform that is transported to a natural gas source, such as a well. The system supplies natural gas through multiple hose reels to operate multi-fuel engines for well field equipment such as pumps, compressors, and trucks. A coalescing filter removes contaminants from the natural gas. A generator powered by the natural gas supplies process electricity. A process control monitors and controls the natural gas processing system, including pressure, temperature, moisture, and flow sensors. A gas chromatograph will determine the chemical composition of the natural gas. A gas evacuation system removes gas from the hose reel assemblies in the event of an emergency. An emergency shutdown system will halt the process in the event of high liquid levels, a gas leak, fire, or gas composition out of specification.