411 results about "Contamination control" patented technology

Methods and apparatus for pollution control which are well suited for use in a coal power plant are described. Ash is collected and injected into the flue gas stream at a location upstream of a cooling module. The ash acts as an absorbent and/or reactant material onto which condensate may condense. By re-introducing ash to keep the condensation forming wet areas within the system, lower cost materials which are less corrosion resistant than needed for wet operating conditions can be used. Mercury recovery and SO3 removal is facilitated by the cooling process and re-introduction of collected ash. Activated carbon and/or an alkali absorbent material may be added. Use of a dry ESP and/or fabric filter as opposed to a wet ESP for particulate collection leads to cost benefits. Energy recovered by the cooling of the flue gas may be re-used to heat turbine condensate leading to improved energy efficiency.

The invention discloses a magnetic Co ₃ o ₄ The ‑C nanometer material and its preparation method and the application of activated persulfate as a catalyst in wastewater treatment belong to the technical field of water pollution control. In this method, cobalt metal-organic framework compounds are used as precursors, which are calcined at high temperature in a certain atmosphere, and finally magnetic Co ₃ o ₄ ‑C nanomaterials. The porous carbon component in this material not only acts as a carrier of metal oxides to evenly distribute the catalytic sites, but also effectively enriches pollutants in water to improve the degradation efficiency of the system; the magnetic Co in this material ₃ o ₄ The components can be used as heterogeneous catalysts to efficiently activate monopersulfate to generate free radicals to degrade pollutants in water bodies. The method has the characteristics of high efficiency and convenience, wide application range of pH, catalyst recovery by external magnetic field, good recyclability, and environmental friendliness, and has great potential in the actual treatment and application of organic wastewater.

The present invention belongs to the technical field of soil heavy metal remediation, specifically discloses a method for preparing the iron-based biochar material, the iron-based biochar material prepared there from and a method for controlling the heavy metal pollution in soil using the iron-based biochar material. For the iron-based biochar material of the present invention, by using a method of high-temperature carbonization, a biomass is used as a raw material and an iron-containing compound is add in the process of preparing biochar, wherein iron is incorporated in a specific ratio, to form the iron-based biochar material with a special structure and function. The material has a simple preparation process, low cost and a short production period; the prepared iron-based biochar material has an unique effect on the arsenic-cadmium combined pollution soil remediation, can effectively reduce the bioavailability of arsenic and cadmium in the soil, significantly reduces the arsenic and cadmium contents in the agricultural products planted in the arsenic-cadmium combined pollution soil, and has no toxic and side effects on the crops, is safe to apply and can be applied to the control of arsenic-cadmium combined pollution soil in a large scale.

A structure for holding sample-containing receptacles includes a cover with holes formed therein through which the receptacles can be accessed with a substance transfer mechanism, such as a robotic pipettor. When the transfer mechanism is inserted into and then withdrawn from a receptacle, a string of viscous material may be suspended from the mechanism. A viscous string removal element adjacent each opening engages the string of viscous material and dislodges the string from the mechanism when the mechanism moves in a prescribed path with respect to the removal element. A sample rack configured to hold receptacles and to be inserted into the structure below the cover includes a sample rack having receptacle-receiving pockets, each with a resilient element and a positioning feature for holding receptacles of varying sizes in a predetermined position within the receptacle receiving pocket, and a cover including features for preventing a receptacle from being pulled out of its receptacle-receiving pocket when the transfer mechanism is withdrawn from the receptacle.

The invention discloses a river channel permeable reaction wall system and the application thereof in water pollution treatment. In the system, one or a plurality of water treatment units are arranged on water banks in a ground mode, a half-buried mode or an all-buried mode; a water distribution system leads the river water to be continually treated by the water treatment units and then be returned to the river channel, or the water distribution system leads the surface-source type polluted water body near the river channel to be treated by the water treatment units and then be returned to the river channel; the water treatment unit comprises an water inlet groove, a permeable reaction wall and a water outlet groove, wherein, the water inlet groove is separated from the permeable reaction wall by a reticular grating. The system properly alters the water banks without occupying other land resources. Based on the original PRB technical principle, the system alters the water banks to cause the water to agree with river channel water quality purification and river-entering pollution control without affecting the function of the river channel. The system has remarkable effect to the water quality treatment of lake-entering rivers and urban pollutant holding rivers and the control of river surface source type pollution.

The invention discloses a circulating fluidized bed garbage incineration boiler and a pollution control system with the same, which relate to a garbage incineration boiler and a pollution control system with the same, and aim to solve the problems that the conventional circulating fluidized bed garbage incineration furnace difficultly discharges slag and is required to be stopped regularly to remove the slag and the economy of a garbage incineration plant is influenced. According to the scheme I, a circulating fluidized bed and double V-shaped wind distributing plates are arranged in a boiler body, the boiler body, a separator, a flue gas cooling chamber and a tail flue are communicated in sequence, an upper level low-temperature superheater, a lower level low-temperature superheater, a primary wind air preheater, a secondary wind air preheater, an upper level primary wind economizer, a lower level primary wind economizer, an upper level secondary wind economizer and a lower level secondary wind economizer are arranged in the tail flue, and the separator is communicated with the boiler body by a U-shaped valve; different from the scheme I, the scheme III is characterized in that: double inverted V-shaped wind distributing plates are adopted; different from the scheme III, the scheme V is characterized in that: an inverted V-shaped wind distributing plate is adopted; and according to the scheme II, the scheme IV and the scheme VI, a semidry reaction tower, a bag-type dust collector, an induced draft fan, a chimney, a fly ash cabin, a lime slurry preparation system, a rotary atomizer and an active carbon injecting device are added on the basis of the scheme I, the scheme III and the scheme V. The circulating fluidized bed garbage incineration boiler and the pollution control system with the same are used for incinerating garbage, and pollutant emission can be controlled.

An ecological method using artifical marshland system for controlling N-P pollution includes such steps as sequentially flowing the rain or sewage in sand deposition pool, in stage-one free-surface artificial marshland (staying for more than 1.5 hr), in zeolite undercurrent marshland containing zeolite and cinder (staying for more than 1 hr), and in stage-two free-surface artificial marshland (staying for more than 8 hr). Its advantage is high effect.

An air-conditioning system of a substrate processing apparatus includes an air inlet line for providing air to a clean room. A contamination control apparatus for removing contaminants in the air is connected to the air inlet line. A controller controls temperature and humidity of the air without the contaminants. An air outlet line provides the air having the controlled temperature and humidity to a substrate processing chamber that is disposed in the clean room. The contamination control apparatus includes a spray unit having at least one nozzle that sprays water. At least one eliminator that traps the water for capturing contaminants in the air and drops the trapped water into a tank. A water circulation unit provides the water that includes an additive for controlling pH of the water to the spray unit.

The invention relates to an efficient ecological type sewage and sludge treating agent and a preparation method thereof. A flocculant X consists of sodium carboxymethyl cellulose, polyferric sulfate and sodium bentonite with the weight ratio of 2:7:1; and a coagulant aid Y consists of starch, 2nd generation polyamide-amine, sodium hydroxide and ammonium persulfate with the weight ratio of 10:8:2:0.05. The invention overcomes the defects that the production process of multi-generation PAMAM dendritic polymer needs to be repeated many times, and the cycle time of each generation is overlong, which seriously affects the production process and greatly reduces the production efficiency, so the contamination control enterprises can not apply the multi-generation PAMAM dendritic polymer. The invention does not have the defects of high amide monomer residue in wastewater treatment by polyacrylamide and low production efficiency of the 4th generation polyamide-amine dendritic polymer, greatly increases the production efficiency, and enables the treating agent to have handleability and contamination removal and control effects.

A module for transferring a substrate includes a load port for supporting a container to receive a plurality of substrates, a substrate transfer chamber disposed between the load port and a substrate process module, a substrate transfer robot disposed in the substrate transfer chamber for transferring the substrates between the container and the substrate process module, a gas supply unit connected to the substrate transfer chamber for supplying a purge gas into the substrate transfer chamber to purge an interior of the substrate transfer chamber, and a contamination control unit connected to the substrate transfer chamber for circulating the purge gas supplied into the substrate transfer chamber, resupplying the circulated purge gas into the substrate transfer chamber and removing particles and airborne molecular contaminants from the purge gas being circulated. Contamination of a substrate may be prevented and a necessary amount of purge gas may be reduced.

The invention relates to an ecological dam device for aquaculture pollution control and ecological restoration. An ecological dam is composed of basic composition units of a packing floating bed and a plant floating bed, the packing floating bed is formed by a floating bed body, packing and a fixing net, and the plant floating bed is arranged on the internal water surface of the packing floating bed. A plurality of unit structures are interconnected to form a box dam which is fixed. The ecological dam is constructed around an aquaculture zone, aquaculture contaminants in the dam are decomposed and converted through microorganism when passing through the ecological dam, and plant roots in the floating bed body absorb nitrogen and phosphorus nutrients, so that the purpose of contamination control is achieved; meanwhile, materials are recycled through food chains formed by rich ecological systems in the ecological dam, so that bait utilization rate can be increased. The ecological dam constructed in a contaminated water body can have the ecological system of the water body in the dam restored through the ecological restoration. Compared with the prior art, the ecological dam device has the advantages that aquaculture capacity and environment capacity of aquaculture can be improved, and dual functions of resource development and utilization and ecological environmental protection can be realized.

A contamination control system for cathode intake air for fuel cell systems, particularly PEM fuel cell systems. The contamination control system incorporates three portions, particulate control, chemical contaminant control, and sound suppression or attenuation of the noise emitted by air handling equipment such as compressors, blowers, fans and expanders. At least one of these portions is designed and installed in the fuel cell system with the intent of lasting the life of the system. In a preferred system, a z-filter configured for straight-through flow is permanently installed in an automobile.

The invention relates to a soil treatment method for inhibiting the Cd/Pb absorption of rice in a contaminated farm land and belongs to the technical field of environmental contamination control and agricultural product quality safety. On a Cd/Pb contaminated land with Cd content of less than 5mgkg<-1> and Pb content of less than 500mgkg<-1>, a biomass carbon soil improvement material is spread on the surface of the contaminated land in an amount of 10 to 40 tha<-1> after harvesting previous crops, and uniformly mixed with soil in a cultivated layer. In the invention, the raw materials are rich, the cost is low, the operation is simple, the Cd/Pb content in brown rice is reduced effectively without influencing yield, and the inhibition effect on the Cd/Pb absorption of rice is remarkable.The biomass carbon soil improvement material is applied in an amount of 40 ton per hectare; and compared with the treatment without applying the biomass carbon soil improvement material, the Cd/Pb content in the rice seeds is reduced by 40 to 50 percent.

The invention relates to a watershed pollution control unit partitioning method which comprises the following steps: performing sub-watershed zoning and water ecological function zoning on a researchwatershed, and analyzing pollution source composition and pollution load in combination with village and town administrative division; calculating spatial distribution of drainage basin pollution loads by adopting a drainage basin semi-distributed hydrology and pollutant transportation coupling model based on a process, and calculating pollution load spatial distribution of village and town administrative divisions in combination with the village and town administrative divisions; and performing pollution control unit division based on the sub-basin partitions, the water ecological function partitions, the village and town administrative division and the pollution load spatial distribution. According to the method, the difference between hydrological processes and pollutant conversion under different land utilization and different soil types is considered; the river water quality under the combined action of runoff, point source and non-point source of each sub-basin is continuously simulated . the pollution output load of each sub-basin is calculated to the river channel, the village and town administrative division is combined, the village and town subareas are combined with similar pollution source composition and pollution load, and a pollution control unit is divided.