39results about How to "Reduced chance of deposition" patented technology

The invention discloses a finned tube and a heat exchanger. The finned tube comprises a base tube body and fins arranged on the outer surface of the base tube body. The finned tube is characterized in that a flow disturbing hole enabling flue gas to be disturbed on an incident flow face is formed in the incident flow face of each fin; the flow disturbing holes extend from the inner ends of the fins to the outer ends of the fins, and the outward extending height is 1 / 2 to 2 / 3 of the height of the fins; the fins are parallel fins or spiral fins arranged at intervals. On the premise of guaranteeing the surface expansion rate of the finned tube, the flow characteristic of flue gas outside a pipeline of the heat exchanger can be improved, the flow speed of flue gas in a trailing vortex area of the pipeline is reduced, and therefore ash deposition of the finned tube is relieved.

The invention discloses a bidirectional water flow channel, which comprises a base plate, wherein a water inlet is arranged at the front section of the base plate; a water outlet is arranged at the rear section of the base plate; a water baffle outer side wall is symmetrically arranged at the left side and the right side of the base plate in parallel; a first water dividing plate, a second water dividing plate and a water baffle piece are arranged on the base plate and between the two water baffle outer side walls; the first water dividing plate and the second water dividing plate are symmetrically arranged left and right at intervals to form a splayed water dividing piece; the water baffle piece is V-shaped and is arranged at the rear part of the water dividing piece at intervals; the openings of the water dividing piece and the water baffle piece both face the direction of the water inlet; water flowing channels are formed between the outer wing of the first water dividing plate and the outer side wall of the water baffle plate, between the outer wing of the second water dividing plate and the outer side wall of the water baffle plate, and between the outer ring of the water baffle piece and the outer side wall of the water baffle plate; and the symmetric lines of the water dividing piece and the water baffle piece are both coaxial with the center line of the base plate. The bidirectional water flow channel is simple in structure, stable in flow, strong in anti-blocking performance, small in manufacturing deviation, low in production cost and long in service life.

The invention relates to a particulate matter concentration detection device. The device comprises an upper shell, a lower shell, an airflow channel, a laser emission device and a photoelectric conversion device. The device has the advantages that filtered clean air enters a sealed sheath flow channel through the two sides of a measuring channel, and the clean air is isolated from the measured airflow, so that the clean air is prevented from diffusing in a free space; a flow guide plate and a laminar flow sheet are arranged on a clearance area of the photoelectric conversion device of the lower shell, the clean air flows under the laminar flow sheet through the flow guide groove, the measured airflow flows above the laminar flow sheet through the flow guide plate, and the clean air forms alaminar flow (cleaning barrier) to wrap and blow the photoelectric conversion device, so that a probability that the particulate matters are deposited on the photoelectric conversion device is reduced, the technical problem that the particulate matter detection is misjudged due to the fact that the background noise caused by deposition of particulate matters in the measured airflow on the photoelectric conversion device is large is overcome, and the technical effects of improving the accuracy and stability of particulate matter concentration detection and prolonging the service life of the device are achieved.

The invention discloses a cigarette smoke aerosol testing device. The device comprises a smoke sampling device, a diluting device and an aerosol testing device which are connected by a pipeline in sequence. The device has the following technical effects: 1, real-time testing of the grain size distribution of fresh cigarette smoke aerosols is realized; 2, the smoking forces generated by the cigarettes come from the smoking machines with bell-shaped suction curves and the smoking scheme is standard; 3, the effects of dilution on the testing results of the aerosols are reduced; and 4, partial flow sampling is adopted, thus reducing the particulate matters entering into the diluting system, reducing the probability of particle deposition and reducing the problem of easy blocking of the diluting system and the valves.

The invention discloses a pressure-stabilizing non-negative pressure water supply system, which comprises a water inlet pipe, a water inlet pipe voltage stabilizing device, a water supply power combination device and a water supply pipe. , after the water inlet pipe is processed and pressurized by the water supply power combination equipment, it is supplied to each user; the water inlet pipe pressure stabilization equipment includes a high-level water tank, a hydraulic cylinder and a pressurized cylinder. The high-level water tank is connected with the water inlet pipe through an L-shaped pipe. A replenishment valve is provided, and the bottom of the high-level water tank communicates with the pressurized cylinder through a folded pipe. The folded pipe is provided with a first electromagnetic control valve and a third check valve, and a liquid level sensor is built in the high-level water tank; the output shaft of the hydraulic cylinder It is fixedly connected with the piston in the pressurized cylinder, and the bottom end of the pressurized cylinder communicates with the water inlet pipe through the pressurized tube, and the second electromagnetic control valve and the fourth check valve are arranged on the pressurized tube.

The present invention relates to a photoelectric smoke detector having a double-bulkhead darkroom structure and, more particularly, to a photoelectric smoke detector having a double-bulkhead darkroom structure, comprising: a base having, on one side thereof, a light emitting element receiving part in which a light emitting element for irradiating light to the inside thereof is mounted and, on the other side thereof, a light receiving element part in which a light element for receiving scattered light generated by smoke particles from the light irradiated by the light emitting element is mounted; an outer bulkhead which protrudes toward a lower side of the base to form an outer wall of the smoke detector and in which a smoke inlet having a specific height is formed in a circumferential direction; a lower end surface coupled to a lower end of the outer bulkhead; and an inner bulkhead which protrudes from the lower end surface to an upper side, is disposed to be spaced apart from the outer bulkhead at a specific interval, and is formed to have a height smaller than the height of the outer bulkhead so as to form a gas flow area in an upper portion thereof, wherein smoke flows in through the smoke inlet and passes through a space between the outer bulkhead and the inner bulkhead, and the gas flow area.

The invention provides a water channel assembly, a base and an air conditioner. The water channel assembly comprises an upper water channel and a lower water channel arranged on the lower side of theupper water channel, wherein the upper water channel and the lower water channel are of elongated slot structures and are in penetrating states along the length direction. The upper water channel shields the lower water channel in the vertical direction. According to the water channel assembly, by combining the upper water channel and the lower water channel up and down, the water channel assemblynot only can collect condensate water generated by a heat exchanger, but also can collect condensate water on the inner and outer side walls of the base of the air conditioner effectively to preventthe condensate water from dropping and the like, so that the using comfort of the air conditioner is improved. Moreover, as the upper water channel shields the lower water channel in the vertical direction, the probability about ash layer deposition in the lower water channel can be further reduced effectively, so that the conditions that the lower water channel is blocked by the ash layer and thelike can be prevented effectively to further prevent the condensate water from being accumulated and dropping to a using space, and therefore, the using comfort of an air conditioner user is improved.

The invention discloses a spiral winding tube type heat exchanger and a variable flow cooling device. The spiral winding tube type heat exchanger comprises a shell (1) and a spiral tube bundle located at the two ends in the shell and installed on a tube plate (6), a tube pass inlet (1-1), a tube pass outlet (1-2), a shell pass inlet (1-3) and a shell pass outlet (1-4) are formed in the shell (1), the spiral tube bundle is composed of a plurality of layers of spiral tubes (2) which are wound into the spiral shape concentrically, and a plurality of spiral tubes (2) are wound in the same direction to form each layer of spiral tubes (2); a plurality of baffle plates (4) are installed between the layers of spiral tubes (2), and the two ends of each baffle plate (4) are fixed to the corresponding spiral tube (2). Not only can the heat exchange strength of fluid in the tubes be guaranteed, but also convection heat exchange of fluid outside the tubes can be strengthened; the exterior of the winding tube type heat exchanger is connected with a temperature sensor, a control system, a variable frequency motor, a pump and other system parts, the flowing amount of cooling mediums can be adjusted in real time, the winding tube type heat exchanger adapts to changes of cooling loads, and the energy-saving requirement is met; meanwhile, the winding tube type heat exchanger has the advantages of preventing scaling and being resistant to corrosion.

The embodiment of the present application provides a process and device for biomass gasification to produce methanol, which relates to the technical field of chemical equipment. The biomass gasification methanol production device includes: a reaction furnace and a feed box. The feed box is arranged on the top of the reaction furnace, and the bottom end of the feed box communicates with the top feed port of the reaction furnace through a connecting pipe, and the top of the feed box communicates with a feed pipe , the inside of the feed box is slidingly installed with a pusher plate and a sealing plate, the surface of the pusher plate and the surface of the sealing plate are all equipped with a sealing strip, and the sealing strip is connected to the feed The inner wall of the box is hermetically sealed. In this application, through the cooperation of the telescopic pusher and the pusher plate, the raw materials entering the feed box can be pushed, and the raw materials can be transported to the reaction furnace, and through the cooperation of the pusher plate, the sealing plate and the sealing rubber strip, the In the process of raw material transportation, the sealing of the feed box is maintained to reduce the possibility of the gas in the reaction furnace leaking through the feed box.

Mixing device (1) for mixing an additive (2) with an exhaust gas flow (3), wherein the mixing device comprises at least one overflow plane which is arranged in a mixing section of an exhaust gas line. The exhaust gas duct (6) has a cross section (7) and a main flow direction (8) of the exhaust gas flow (3). The mixing device is characterized in particular in that the at least one overflow plane (4) is arranged centrally in the mixing section (5) and is oriented in the main flow direction (8) of the exhaust gas flow (3), wherein in A plurality of closed recesses (9) are formed in the overflow plane (4). The proposed mixing device achieves efficient mixing of the exhaust gas flow with additives without high flow resistance.

The present invention relates to a photoelectric smoke detector having a double-bulkhead darkroom structure and, more particularly, to a photoelectric smoke detector having a double-bulkhead darkroom structure, comprising: a base having, on one side thereof, a light emitting element receiving part in which a light emitting element for irradiating light to the inside thereof is mounted and, on the other side thereof, a light receiving element part in which a light element for receiving scattered light generated by smoke particles from the light irradiated by the light emitting element is mounted; an outer bulkhead which protrudes toward a lower side of the base to form an outer wall of the smoke detector and in which a smoke inlet having a specific height is formed in a circumferential direction; a lower end surface coupled to a lower end of the outer bulkhead; and an inner bulkhead which protrudes from the lower end surface to an upper side, is disposed to be spaced apart from the outer bulkhead at a specific interval, and is formed to have a height smaller than the height of the outer bulkhead so as to form a gas flow area in an upper portion thereof, wherein smoke flows in through the smoke inlet and passes through a space between the outer bulkhead and the inner bulkhead, and the gas flow area.

The invention discloses a cigarette smoke aerosol testing device. The device comprises a smoke sampling device, a diluting device and an aerosol testing device which are connected by a pipeline in sequence. The device has the following technical effects: 1, real-time testing of the grain size distribution of fresh cigarette smoke aerosols is realized; 2, the smoking forces generated by the cigarettes come from the smoking machines with bell-shaped suction curves and the smoking scheme is standard; 3, the effects of dilution on the testing results of the aerosols are reduced; and 4, partial flow sampling is adopted, thus reducing the particulate matters entering into the diluting system, reducing the probability of particle deposition and reducing the problem of easy blocking of the diluting system and the valves.

The invention relates to the field of polysilicon, and particularly relates to a system for preparing polysilicon granules in a fluidized bed and a process for preparing polysilicon by using the same. The system comprises a fluidized bed reactor, a cyclone separator, a fine silicon granule seed crystal tank and a silicon granule feeding tank, wherein the fluidized bed reactor comprises a fluidized bed reactor barrel and a fluidized bed expanding section; the bottom of the fluidized bed reactor barrel is provided with a product discharge outlet, the lower part of the fluidized bed reactor barrel is provided with a silicon source gas inlet and a diluting gas inlet, and the fluidized bed reactor barrel is externally wrapped with a reactor heating device; the top of the fluidized bed expanding section is provided with a reaction tail gas outlet; the top of the fine silicon granule seed crystal tank is provided with a silicon seed crystal feed inlet and a tail gas outlet; the bottom of the fluidized bed expanding section is fixedly connected with the top of the fluidized bed reactor barrel, and the diameter of the fluidized bed expanding section is greater than that of the fluidized bed reactor barrel. The system prolongs the service life of the fluidized bed reactor, saves energy, and prevents polysilicon from being contaminated by the outside; and an effect of continuous production is achieved, thereby improving the production efficiency.