10415 results about "Dust control" patented technology

This invention provides low dust low density gypsum wallboard products having high total core void volumes, corresponding to low densities in the range of about 10 to 30 pcf. The wallboards have a set gypsum core formed between two substantially parallel cover sheets, the set gypsum core preferably having a total void volume from about 80% to about 92%, and made from a slurry including stucco, pregelatinized starch, and a naphthalenesulfonate dispersant. The combination of the pregelatinized starch and the naphthalenesulfonate dispersant also provides a glue-like effect in binding the set gypsum crystals together. The wallboard formulation, along with small air bubble voids (and water voids) provides dust control during cutting, sawing, routing, snapping, nailing or screwing down, or drilling of the gypsum-containing products. This invention also provides a method of making the low dust low density gypsum products including the introduction of soap foam in an amount sufficient to form a total void volume, including air voids, preferably from about 80% to about 92% in the set gypsum core, corresponding to a set gypsum core density from about 10 pcf to about 30 pcf. The wallboards produced by the method generate significantly less dust during working.

The invention discloses a resource utilization process of organic hazardous waste. The resource utilization process includes the steps that classified storage and treatment of solid-phase, solid-liquid mixing and liquid-phase organic hazardous waste are carried out; solid-phase crushing, grinding and screening treatment is carried out; solid-liquid mixing is carried out after solid-liquid separation, solid-phase grinding and liquid-phase sedimentation separation treatment is carried out; direct liquid-phase sedimentation is carried out; then after solid-liquid mixing, a fluxing agent is addedfor stirring, a stabilizer and a dispersing agent are added for slurrying, the slurry is fed into a gasifier, and the obtained gas is used as fuel gas after being subjected to cooling, dedusting, spraying and desulfuration; slag tapping and vitrification slag discharge are carried out; and waste water is recycled. The resource utilization process has the beneficial effects that solid phase, solid-liquid mixing and liquid-phase comprehensive treatment, harmless treatment and slag discharge are realized.

The present invention relates to polysaccharides that have been modified by providing azetidinium functionality thereto. Such functionality can be provided by crosslinking a polysaccharide with a resin having azetidinium functional groups. In one or more aspects, the polysaccharide can comprise one or more of starch, guar gum, alginate or derivatives thereof. Polysaccharides having azetidinium functionality according to the present invention are suitable for multiple uses. Such uses include, but are not limited to, removal of one or more solid materials from a liquid, beneficiation of an ore, removal of metallic ions from a liquid; providing oil from bitumen; and removal of mercury from synthetic gypsum. Other uses of the functionalized polysaccharides of the present invention include hydroseeding, dust control and corosion control.

The invention relates to a multi-plane dust removing device comprising a plurality of parallel electrodes attached to each plane needing dust removal and dust monitoring controllers arranged on or near the planes needing dust removal, wherein the electrodes and the dust monitoring controllers corresponding to the multiple planes needing dust removal are respectively cascaded in sequence, the cascaded electrodes are connected with a pulse generator, the pulse generator is electrically connected to a power supply, the pulse generator is further electrically connected with an intelligent controller, the intelligent controller is electrically connected with the cascaded dust monitoring controllers, the dust monitoring controllers are used for feeding dust status signals of the planes needing dust removal back to the intelligent controller, and the intelligent controller is used for outputting a first control signal to the pulse generator. The intelligent controller is used for automatically calculating pulse parameters according to the feedback results of the dust monitoring controllers and further outputting the signal to the pulse generator, and the pulse generator is used for applying different pulse signals to the electrodes on all the planes to generate a varying electromagnetic field so that various types of dust on all the planes can be removed.

At least one embodiment of this invention relates to a cushioned dust control mat article wherein the mat comprises at least two distinct layers of rubber, one comprising foam rubber, the other comprising solid rubber. The solid rubber layer is present over the foam rubber layer on the side of the mat in which at least one integrated rubber protrusion is present to provide cushioning characteristics. The solid rubber layer acts as a cap or barrier for the foam rubber layer, particularly over the integrated protrusion or protrusions, in order to provide a mat which is resilient, will not easily degrade in its modulus strength after appreciable use and/or washing within industrial cleaning processes, and will not exhibit appreciable cracking or breaking, particularly within the integrated protrusion(s), after standard use for pedestrian traffic. A method of producing such an inventive cushioned floor mat article is also provided.

Preferred nose cones 100 associatable with a tail spout 120 of a sand handler and a vacuum hose 130 of a vacuum system are described herein. A method for containing respirable and/or inhalable particles 140 created in an industrial process is also disclosed herein.

Dust control and/or freeze control compositions and methods of using the compositions are provided. In an embodiment, the present invention provides methods of utilizing the dust control and/or freeze control products. For example, the method can comprise preventing the agglomeration of particulate material comprising coal and the adhesion thereof to surfaces in subfreezing weather. The method can also comprise preventing dust formation from particulate material handling processes. The dust control and/or freeze control compositions can comprise one or more glycerin by-products derived from a biodiesel manufacturing process. The dust control and/or freeze control compositions can also comprise one or more glycerin by-products of transesterification reactions involving triglycerides.

The invention provides compositions to remove mercury and other pollutants from a fluid stream, particularly flue gases containing them. The compositions are mixtures of compounds selected from two or more different groups of compounds. One of the compositions can simultaneously remove mercury and condition the dust for better removal of the dust by an ESP if an ESP is the device of choice for dust control. This composition is a mixture selected from the group of halides other than fluoride and chloride, and mixture thereof, and that selected from a group of nitrates. In the other invention, the composition consists of a mixture of selected polyhydroxy compound or compounds, ammonium sulfate, halides other than fluoride and chloride, and mixture thereof. The composition can be liquid or dry powder and can be injected ahead of the particulate control device as a mist when the formulation is a liquid or as a powder when dry. Methods are provided for applying the formulations.

The invention belongs to the field of computer assembly, in particular to a dust removal device after assembly of a computer main case. The technical problem to be solved by the present invention is to provide a dust removal device after assembly of the computer main case which can reduce the labor intensity, improve the dust removal efficiency and improve the quality of the case. In order to solve the above-mentioned technical problems, the present invention provides such a dust removal device after the computer main case is assembled, which includes a first bracket, a workbench, a first slide rail, a first slider, a placement frame, a support plate, and a first bearing seat , main air pipe, rotating shaft, gear, air spray head, joint, etc.; the top of the first bracket is provided with a workbench, and the top of the workbench is horizontally connected with the first slide rail by means of bolt connection. The present invention blows air to the cabinet by swinging the air spray head left and right to blow away the dust in the cabinet, so that the dust in the cabinet can be removed, the labor intensity can be reduced, and the dust removal efficiency can be improved.

The invention discloses an SCR (selective catalytic reduction) denitration dedusting device and relates to a dedusting device. The SCR denitration dedusting device comprises a reactor inlet flue which is communicated to the front of a denitration reactor. A dedusting guide device is arranged at a 90-degree elbow which is vertically bending upwards from the horizontal direction at the upstream of a denitration reducing agent injection flue gas in the reactor inlet flue, and comprises a guide mechanism and a dedusting mechanism, wherein the guide mechanism is smoothly communicated with a horizontal section and a vertical section of the 90-degree elbow in a bending manner, and a dust hopper and a dust outlet are arranged below the dedusting guide device on the 90-degree elbow. With low loss of pressure, equipment modification cost, running cost, the maximized benefit and the best dedusting effect are realized, and large-particle fly dust easy to block catalysts can be treated effectively.

The invention discloses a telligent dry separator (TDS). The telligent dry separator is characterized in that an intelligent identification method is adopted for establishing corresponding analysis models according to different characteristics of coal quality, through big data analysis, digitalized identification is conducted on coal and gangue, and finally the gangue is discharged through an intelligent execution system. The telligent dry separator (TDS) comprises four major systems, namely a feeding system, a material distribution system, an identification device and an execution mechanism, and three auxiliary systems, namely an air supplying system, a dedusting system and an electric control system. By means of the telligent dry separator (TDS), separation precision can be improved, the lower separation limit can be further lowered, and a condition is created for achieving the effect that all block raw materials ranging from 3mm to 300 mm adopt the intelligent dry separation process. Compared with traditional cleaning equipment, the telligent dry separator (TDS) has the advantages that on the aspect of construction investment, a system can be simplified, investment can be reduced, and the construction period can be shortened; on the aspect of separation effects, precision can be guaranteed, the heat value can be raised, and no coal slime is generated; on the aspect of production cost, consumption can be lowered, maintenance can be reduced, and manual work can be decreased.

A dust-control apparatus may be used in combination with tilling, cultivating, harvesting, construction machinery, and other mobile soil treatment implements. The apparatus applies mist to dust particles where the mist is created by pumping water or other liquid through nozzles. Because the apparatus is used in combination with the operation of the dust-generating machinery, the dust suppressing mist is applied nearly simultaneously to the generation of the dust by the agitation of the soil by the machinery. In one embodiment of the device, the operation of the pump or valves which control liquid flow to the nozzles is automatically activated by a optical sensor. The optical sensors cause either the starting of a pump or opening of a valve thereby increasing or decreasing the pressure and/or volume of the liquid upon the dust level reaching a preset trigger point as detected by the sensor.

The invention relates to a method for controlling a dust removal device of a heat exchanger of an outdoor machine of an air conditioner. The dust removal device comprises a fan and control equipment, wherein the control equipment comprises a timer, a receiver, a judger and an actuator; and the control equipment controls the fan to reversely rotate for dust removal. The method is characterized by comprising the following steps that: when the air conditioner normally operates, the receiver continuously receives operating parameter information which is fed back by the air conditioner and transmits the operating parameter information to the judger; the judger judges the operating parameter information; when the judger determines that the operating parameter information meets a preset dust removal mode operating condition, the air conditioner operates for dust removal; the actuator controls a compressor of the air conditioner to stop operating; the timer clears the accumulated operating time of the air conditioner and the continuous operating time of the compressor; the actuator controls the fan to stop, the timer starts timing, and when time is equal to first time T1, the judger determines that the fan is in a static state; the actuator controls the fan to start and rotate in the opposite direction relative to the normal operation direction; the timer re-starts timing, and when the time is equal to second time T2, the actuator controls the fan to stop; the timer re-starts timing, and when the time is equal to third time T3, the judger determines that the fan is in the static state; and the air conditioner quits a dust removal mode, starts to normally operate or is directly powered off. By the method, the normal operation of the air conditioner is not influenced, the air conditioner can automatically remove dust, and the service life of the air conditioner can be prolonged.

A heterogeneous mixture produced by blending aliphatic or cyclic organic compounds with carboxylic acids of chemical structure R-COOH and applied to soils in a manner to produce high levels of dust and erosion control, and soil stabilization. Alternatively, a heterogeneous mixture may be produced by blending aliphatic or cyclic organic compounds with polyolefins of chemical structure C_nH_2n or R—C_2nH_3n, and applied to soils in a manner to produce high levels of dust control and soil stabilization. The aliphatic and cyclic compounds act as plasticizers and carriers for the carboxylic acids or polyolefin compounds. When applied to soil the carrier provides a mechanism for the carboxylic acid or polyolefin to penetrate the soil and also acts as a dust suppressing weighting agent. The plasticized carboxylic acid and/or polyolefin provides a durable, reworkable binder that associates small particulates while stabilizing soil and aggregate.

A product for dust control and freeze control, wherein the product comprises a mixture of from about 45 to about 90 weight percent of glycerin, from about 5 to about 50 weight percent of water and from about 2 to about 15 weight percent of a water soluble salt is described and claimed. The product may be diluted with about 10 to about 400 weight percent of water for use, based on the amount of the product present. The freezing point of the product for example may be about −35° C. The product may be synthesized using commercially available chemicals, or it may be derived from vegetable oils, or it may be a byproduct from a biodiesel manufacturing process of forming fatty acid esters from vegetable oils.

A manual machine tool (10) with a vacuum device for dust removal (19) situated in its housing (12) and having a blow-out connection (20) installed after this, to which a dust collection box (21), particularly self-contained, can be attached in detachable fashion via its blow-in connection (22), which dust collection box (21) is airtight on all but two sides, with the dust collection box (21) comprising air-exit holes (40) on the top side (36) and comprising a dustproof filter element (48)-especially a fluted filter-on the inside, is particularly secure against the unintentional escape of dust after the dust collection box is detached from the associated manual machine tool because a pair of sealing lips (500) arranged as a separate part is provided inside the blow-in connection (220), which pair of sealing lips (500) is connected as a single part with closing flaps (520, 1520) projecting into the interior of the dust collection box (200).

The invention discloses an improved textile machine with a dust removal function, which comprises a machine frame, wherein a dust removal box is fixedly connected to the side wall at the upper end ofthe machine frame, a first filter screen and a second filter screen are symmetrically connected to the inner wall of the dust removal box in a sliding manner, and a shaking device for shaking the first filter screen and the second filter screen is mounted in the dust removal box. By the arrangement of a connecting rod which is connected to the inner wall of the dust removal box in a rotary manner,the rotation of the connecting rod enables bristles on the side wall of a transverse plate to clean the first filter screen, due to the arrangement of magnetic semi-discs and magnets, the first filter screen can reciprocate and shake when the connecting rod rotates, so that the cleaning of the first filter screen is accelerated; and by the arrangement of arc-shaped blocks attached to glass blocks, static electricity is generated by friction between the glass blocks and the arc-shaped blocks when the connecting rod rotates, and fine dust escaping from mesh holes of the first filter screen is cleaned, so that the fine dust is prevented from floating into the air to affect the working environment of workers and cause harm to the health of the workers.

The invention provides a fine desulfurization process for blast furnace gas, and belongs to the technical field of gas desulfurization. The process specifically comprises the following steps that blast furnace gas enters an organic sulfur hydrolysis system after being subjected to bag dust removal; and the hydrolyzed gas enters a top pressure recovery turbine power generation device and then enters a wet alkali washing desulfurization system. The organic sulfur hydrolysis system comprises a hydrolysis reactor and an acoustic wave soot blowing system, and the wet alkali washing desulfurizationsystem comprises an absorption tower, a circulating water tank, a circulating water pump, an alkali liquor storage tank, an alkali liquor pump, a process water tank and a process water pump. The process can effectively reduce resistance loss caused by the hydrolysis system and save large operation cost for enterprises.

The invention discloses a hardware fitting machining perforating device with an automatic dust removal function. The hardware fitting machining perforating device comprises a working table, a box shell is fixedly connected to the upper end of the working table, an air cylinder is arranged at the center of the upper end of the box shell, a fixing plate is fixedly connected to the lower end of the air cylinder through a piston rod, a motor shell is fixedly connected to the bottom of the fixing plate, a hole drilling motor is installed inside the motor shell, a drill bit is fixedly connected to an output shaft of the hole drilling motor, a plurality of chip spaces are evenly formed in the inner wall of the table face of the working table, a dust cage is communicated with the bottoms of the chip spaces, and the lower end of the dust cage is connected with a dust collector through a guide pipe. The hardware fitting machining perforating device is simple in structure and easy to operate, chippings generated by perforating can be collected, meanwhile, the cleaning effect is better, and the table face cleanliness of the working table is kept.

There is provided a lead-free piezoelectric ceramic having a high and stable piezoelectric constant and a high and stable mechanical quality factor in a wide operating temperature range. A method for manufacturing the lead-free piezoelectric ceramic is also provided. the general formula (1)

(Ba_1-xCa_x)_a(Ti_1-y-zSn_yZr_z)O₃

(0.08≦x≦0.20, 0.01≦y≦0.04, 0≦z≦0.04)  (1)

A piezoelectric ceramic includes a main component containing a perovskite type metal oxide having the following general formula (1); and Mn as a first auxiliary component. The amount b (mol) of Mn per mole of the metal oxide is in the range of 0.0048≦b≦0.0400, and the value a of the general formula (1) or (2) is in the range of 0.9925+b≦a≦1.0025+b.

The present invention relates to a liquid dust control composition comprising an anionic surfactant, a dust control agent and water.

The invention relates to a fabric surface dust removal device, which belongs to the technical field of fabric dust removal facilities and comprises a machine frame, a box body of a dust removal box, a first hair brush roller, a second hair brush roller, a motive power transmission mechanism, a first dust collection bucket and a second dust collection bucket, wherein a first cloth guide roller and a second cloth guide roller are arranged on the top of the machine frame, the top of the box body of the dust removal box is provided with a dust removal fabric guide-out roller, the bottom of the box body of the dust removal box is provided with a fabric guide-in roller, in addition, a cloth guide groove is formed in the center of the box body of the dust removal box, the first hair brush roller and the second hair brush roller are arranged in a box body cavity of the box body of the dust removal box, the same ends of a first hair brush roller shaft of the first hair brush roller and a second hair brush roller shaft of the second hair brush roller extend to a position outside the box body cavity and are connected with the motive power transmission mechanism, the motive power transmission mechanism is fixed on the box body of the dust removal box, a first dust suction pipe is connected onto the first dust collection bucket, a second dust suction pipe is connected onto the second dust suction bucket, and both the first dust suction pipe and the second dust suction pipe are connected with a negative pressure dust removal mechanism. The fabric surface dust removal device has the advantages that the dust removal effects on both sides of the fabric can be ensured without generating the secondary pollution of dust, and the fabric can smoothly enter the subsequent work procedures in a stable state.

The invention discloses a deep recycling process for oily sludge. The process comprises the following steps: feeding oily sludge and a tempering agent into a tempering tank and uniformly stirring by using a heating device arranged in the tempering tank to realize oil-water-sludge three phase separation; separating an oil-water mixed solution into oil contents and water contents; feeding oily sludge into a vacuum dehydration machine; feeding the dehydrated oil sludge into a dry distillation furnace and performing dried distillation; purifying the dry distilled gas and feeding the purified dry distilled gas into a dry distilled furnace combustion chamber to be used as fuels; carbonizing the surplus sludge into biological carbon; cooling the biological carbon by a cooling device, wherein the cooled biological carbon can be used as a soil conditioner; performing the treatment on the dry distillation furnace flue gas to produce steam through an afterheat boiler to ensure that the steam is used for heating the tempering tank; and performing desulfuration and dust removal on the flue gas recycled by the afterheat to ensure that the flue gas meets the discharge standard. The invention also discloses a corresponding system which consists of the tempering tank, a mixed solution centrifugal separator, a vacuum dehydrator, a condenser, a spiral conveyor, a dry distilled furnace, a cooler and a dry distilled gas purification device. According to the deep recycling process and the deep recycling system, the pollution treatment is realized, and precious resources are recycled, so that the recycling for resources is realized.

A wet orifice vortex collection and dust control device and method are applicable to the prevention and control of dust produced by various boreholes in underground coal mines through compressed air and slag discharge. The wet orifice vortex collection and control device consists of a dust collector front cover, a dust collector rear cover, a drilling casing, a centralized slag discharge pipe, a vortex dust discharge pipe, a Venturi jet ejector and a high-pressure water nozzle; In the wet orifice vortex collection and dust control method, firstly, a drilling rig constructs a shallow hole on the wall of the coal rock mass and inserts the drilling casing, the wet orifice vortex collection and dust control device is suspended and fixed through the suspension ring, and the high-pressure water nozzle is turned on. And maintain the normal operation of the spray during the drilling process, insert the drill pipe through the drill pipe entrance and implement the drilling. The invention has compact structure and convenient operation, which is beneficial to the centralized collection and regular discharge of drilling slag, avoids the escape of dust-laden air from the entrance of the drill pipe, realizes two purifications of dust-laden air, and improves the dust removal efficiency.

The invention relates to the technical field of waste gas treatment and particularly relates to an organic waste gas treatment device and method. The organic waste gas treatment device is characterized by being provided with a dust removing chamber, a cooling treatment mechanism, a photo-catalytic oxidation mechanism, a biochemical spraying and filtering mechanism, a demisting mechanism and an adsorption mechanism, which are connected in sequence, wherein the biochemical spraying and filtering mechanism comprises a chemical washing device used for spraying and washing organic waste gas by a chemical medicament, a biological washing device used for spraying and washing the organic waste gas by a biological medicament, and a biological filter used for filtering the organic waste gas, which are connected in sequence; the photo-catalytic oxidation mechanism comprises a corrugated flow guide plate for controlling a flow state of the gas, a photo-catalytic oxidation device and a filter; the corrugated flow guide plate, the photo-catalytic oxidation device and the filter are connected in sequence; the corrugated flow guide plate is arranged between a gas inlet pipeline and the photo-catalytic oxidation device. The organic waste gas treatment device and method have the remarkable advantages of low system energy consumption, high treatment efficiency, stability in work and the like.

The invention discloses a waste gas treatment device for an industrial furnace. The waste gas treatment device comprises a liquid filter housing, an industrial furnace waste gas pipe and a secondary filter unit. One end of the industrial furnace waste gas pipe is fixedly connected to a gas inlet pipe which is communicated with the industrial furnace waste gas pipe. A filtrate layer is arranged inside the inner chamber of the liquid filter housing. The bottom of the gas inlet pipe successively penetrates through the liquid filter housing and the filtrate layer from top to bottom and extends to the inside of the filtrate layer. One side at the top of the inner wall of the liquid filter housing, far from the gas inlet pipe, is provided with a gas outlet pipe. With the arrangement of the liquid filter housing, the secondary filter unit, the gas inlet pipe, the filtrate layer, the gas outlet pipe and a transmission pipe, the effect of waste gas treatment is achieved. Through a sodium hydroxide solution, sulfur dioxide in waste gas from an industrial furnace is effectively eliminated. The effect of smoke prevention and dust control is ideal, and severe atmospheric pollution caused by waste gas from industrial furnaces is avoided. Therefore, the health of human body is protected, and the device is more environment-friendly.

The invention discloses a stereo prototyping mechanism, comprising a printing assembly for spraying liquid; a quantificational powder delivery assembly for providing powders for construction; a powder spreading device for spreading the powders for construction; a constructing groove system for bearing the constructing powders spread by the powder spreading device and bearing liquid sprayed by theprinting assembly; a heating device for heating the constructing powders while spray printing is carrying out; a spray nozzle maintenance device consisting of a cleaning unit and a seal unit; a transmission part dust control structure covered on the transmission part for preventing the constructing powder from contacting the transmission part; a powder filtering device for absorbing and filteringconstructing powders raised in the operation of the stereo prototyping mechanism; and a continuous liquid feeding device for delivering liquid to a printing box so as to carry out spray printing on the constructing powders.

A street sweeper with vacuumized dust control where a rotary broom chamber surrounds a rotary broom. The rotary broom chamber connects by a conveyor housing containing a conveyor mechanism to a hopper having a powered fan and a filter. A vacuum or low pressure is created within the hopper which communicates through the conveyor housing to the rotary broom chamber which creates an airflow therebetween which carries dust or other light debris to a filter which filters out the dust particles or other light debris. The conveyor housing and other components are positionable to accommodate various modes of operation.

The invention discloses a device for eliminating haze and atmospheric pollutants. Appropriately preheated atmosphere with pollutants flows through a capillary tube array and is introduced into a liquid adsorbent, the pollutants in the atmosphere inside formed bubbles are adsorbed or dissolved by the surface of the liquid inside the bubble, and then atmosphere purification is achieved. The purification is applicable to atmospheric suspended grains of various diameters, and pm2.5 purification can be thoroughly achieved. To enhance the purification effect and the use convenience, the device is provided with function components such as a stirring rod with a bubble cutting steel wire and a spiral belt, and a waste liquid sucking chamber. The device can be separately used and can be also used with other devises in series. The device can be mounted on various carrying tools such as a vehicle, and due to the position change, the haze cleaning places can be changed at appropriate time, and the movement airflow of the carrying tool can be used as the power for eliminating the haze. The device can be used for purifying air at fixed points. When the device is used together with dust cleaning equipment, pm2.5 purification in polluted enterprises can be achieved. With special liquid adsorbent, the device can be used in special purification and professional equipment.

The invention belongs to the field of reutilization of heavy metal sludge, and particularly relates to a heavy metal sludge recycling and comprehensive utilization method. The method comprises the following steps: mixing stainless steel sludge, electroplating sludge, chromium sludge, dedusting ash generated in the chromium-nickel-iron alloy production process, and additive scales, predrying, carrying out reduction roasting, smelting to obtain a chromium-nickel-iron alloy, and using the byproduct smelting slag in preparing the cement additive. The dedusting ash and smelting slag generated in the whole technical process can be recycled, and thus, the method does not generate secondary pollution, maximally saves the resources and energy, lowers the production cost, and has obvious economic benefits.