212results about How to "Avoid direct flushing" patented technology

A sintering machine comprises a sintering pallet, an igniter, a wind cover and an air bellow. The sintering pallet allows a sintering raw material bed layer including solid fuel to move on the sintering pallet; the igniter is located on the front portion above the sintering pallet; the air cover is located on the rear portion above the sintering pallet; the air bellow is located below the sintering pallet, used for converging smoke obtained after combustion and connected with a smoke pipeline allowing the smoke to be exhausted. The sintering machine is characterized by further comprising at least one air inlet located in the top of the wind cover, at least one fuel gas inlet located in the top of the wind cover and connected with respective fuel gas supply pipelines, and a fuel gas blowing controller arranged on at least one fuel gas supply pipeline and used for controlling the fuel gas blowing amount entering the fuel gas inlets. According to the sintering machine, the energy efficiency of the sintering process can be remarkably improved, and the universality and operation controllability of a system are improved. Based on a variable-fuel-gas-flow blowing system of the sintering machine, the problem of outstanding sintering anisotropism can be effectively relieved.

The invention discloses an anti-vortex wearable mechanical seal comprising a rotating ring assembly, a sealing base (24) and a stationary ring assembly composed of a stationary ring (22), a stationary ring base (23), a spring (19), a plug-proof (13), a stationary seal ring (10) and a drive ring (21); the stationary ring base (23) is sleeved on rear of the stationary ring (22); the stationary seal ring (10) is arranged between the stationary ring base (23) and the stationary ring (22); the spring (19), the drive ring (21) and the plug-proof (13) are located between the stationary ring (22) and the sealing base (24); the sealing base (24) is provided with a washing water inlet (3), an inlet channel I (4) and a screw hole (15); right end surface of the sealing base (24) is coated by a rubber protection cover (6); the stationary ring base (23) is sleeved on a step of the rubber protection cover (6). The invention can ensure that the sealing ring in the whole process is not brushed to loss, which effectively ensures sealing performance of mechanical seal.

The invention relates to a water jacket structure of a diesel cylinder block. The upper portion of an intake side of the cylinder block is provided with a water distributing channel, the front end of which is connected with a water pump and the rear end of which is provided with an engine oil cooler cavity; a cylinder block water jacket is formed at the middle/upper portion of the cylinder block and comprises at least two transversely parallel single water jacket bodies, each of which is provided with an water intake hole and a water drainage hole, the water distributing channel is communicated with the interior of each of the single water jacket bodies through the water intake holes; the water intake hole on the first single water jacket body at the front end of the cylinder block water jacket comprises a front straight water intake hole and a rear straight water intake hole, the water intake holes on other single water jacket bodies each comprise a rear straight water intake hole, wherein all the single water jacket bodies are each provided with an oblique water intake hole except the first single water jacket body, the front straight water intake hole, the rear straight water intake hole and the oblique water intake hole are all tangential to the periphery of the single water jacket bodies. The water jacket structure, skillful and reasonable in structure, can effectively cool the cylinder block and the engine oil, increase the rigidity of the intake side of the cylinder block and lower noise.

The invention belongs to the field of low nitrogen discharge of boilers, and particularly relates to a boiler water-cooled wall protecting device capable of preventing coking and high temperature corrosion. The boiler water-cooled wall protecting device comprises water-cooled tubes, flat bars, a heat preserving boiler wall and an air line, small holes are formed in the flat bars which are welded together with the water-cooled tubes in a spacing manner to form a membrane water-cooled wall, an annular space is formed between the membrane water-cooled wall and the heat preserving wall, the upper and lower ends of the annular space are sealed to form a cavity, and the air line is mounted on the heat preserving boiler wall and communicated with the cavity. A boiler combustion air distribution mode is improved, coking and high temperature corrosion of the water-cooled wall are prevented, and high efficient combustion of coal dust and low nitrogen discharge are realized at the same time.

The invention belongs to the field of mines, and relates to a riverbed seepage-proof governing structure. According to the riverbed seepage-proof governing structure, a quaternary seepage-proof structure is arranged on a disturbed riverbed, and the quaternary seepage-proof structure is divided into four layers from bottom to top, namely a riverbed reinforcing layer, a seepage-proof cushion layer, a seepage-proof layer and a seepage-proof protective layer are sequentially laid. According to the design, engineering geology, environment characteristics and technical features of a composite geo-membrane are fully considered, and therefore the effect of the disturbed riverbed seepage-proof governing is enabled to good, and governing cost is lower.

The invention discloses a foamed plastic mold which comprises an upper mold base plate, an upper mold frame, a mold core and a lower mold base plate which are sequentially overlapped with one another from top to bottom, wherein a mold cavity is enclosed by the upper mold frame and the mold core, a lower steam water chamber communicated with the outside world is enclosed by the lower mold base plate and the mold core, the mold core is internally provided with a steam flow channel, the steam flow channel comprises at least one steam inlet and a plurality of steam outlets, and the steam outlets are communicated with the mold cavity. The steam flow channel is arranged in the mold core, cooling water in the lower steam water chamber can not penetrate into the steam flow channel, and a water-steam separating device and a seal ring do not need to be additionally arranged to prevent the cooling water in the lower steam water chamber from penetrating into the steam flow channel. Therefore, the foamed plastic mold provided by the invention has the advantages of being low in production cost, easy to assemble, convenient to maintain, and high in efficiency.

The invention provides a mold-releasing type complexing agent with effects of resisting a high temperature of more than 1450 DEG C, insulating heat and demolding and a preparation method thereof. The mold-releasing type complexing agent comprises the following raw materials in percentage by weight: 20-60% of nano colloidal silicon dioxide solution; 5-30% of composite oxide ultramicro (0.1-1.0 microns) powder including Na, Mg, Ca, Fe, Li, Al, Si, B, Zr and other elements; 0.2-2% of water-based dispersing agent;0.02-0.5% of water-based thickening agent and the balance of water; and the sum of the weight of the components is 100%. According to the mold-releasing type complexing agent with effects of resisting high temperature, insulating heat and demolding, the nano colloidal silicon dioxide solution is cooperated with the ultramicro (0.1-1.0 microns) multielement composite oxide powder, so that the excellent performances of high temperature resistance, heat insulation, demolding, environment protection and the like are achieved, the thermal fatigue resistance of the mold surface is effectively improved, and the service life of the mold is prolonged. The mold-releasing type complexing agent with effects of resisting high temperature, insulating heat and demolding is particularly applicable to using at the part of a mold directly contacting molten steel in fired mold casting and other high temperature forming technologies of metal.

The invention provides a waste heat recovery system for a circular cement production grate cooler. The grate cooler comprises a housing and a clinker channel, wherein a thermal insulation material is arranged between the housing and the clinker channel; waste heat recovery equipment is arranged in the thermal insulation material, and comprises a barrel; a heat exchange tube is arranged in the barrel; the barrel and the heat exchange tube are in a concentric circle structure. According to the grate cooler provided by the invention, sensible heat released by a clinker in a cooling machine in a fast cooling process can be fully absorbed; energy consumption of the clinker is reduced; the waste heat utilization quantity can also be effectively improved.

A mine dedusting apparatus comprises an outer box body, supports, an ash discharge chamber and a dust collecting device, the left end of the outer box body is provided with the dust collecting device, the dust collecting device is arranged at the left side of the top of the ash discharge chamber, the top end of the ash discharge chamber supports the outer box body through a left row of supports and a right row of supports, and a cyclone dedusting chamber, a filtering chamber and a spray chamber are arranged in the outer box body from left to right. The mine dedusting apparatus adopts a dust collecting chamber, cyclone dedusting chamber, filtering chamber and spray chamber combination structure, so large granule dusts can be effectively and discharged to the ash discharge chamber through the dedusting chamber, are dedusted through the cyclone dedusting chamber in a cyclone manner to avoid direct flushing of high-speed dust-containing airflow to a filter cloth bag in the filtering chamber, are filtered by the filter cloth bag in the filtering chamber, enter the spray chamber, and are sprayed to thoroughly dedust. The apparatus has the advantages of high dedusting efficiency, good dedusting effect, and safe and reliable use.

The invention discloses a double-acting double-pipe single-bit coring drilling tool and an application method thereof, and belongs to the field of geological exploration boring machines. The double-acting double-pipe single-bit coring drilling tool comprises an inner-outer core barrel connector, an outer pipe, an inner pipe and a drill bit body arranged at one end of the inner pipe. The outer pipe and the inner pipe are fixed to the inner-outer core barrel connector. An annular gap is reserved between the outer pipe and the inner pipe. A water dividing hole is formed in the inner-outer core barrel connector. Four to eight flange ribs are uniformly distributed on the outer side face of the drill bit body and each provided with a step. The steps of the flange ribs are sleeved with the end of the outer pipe. A row of hard alloy drill bits is embedded in the bottom face of the drill bit body, and a row of hard alloy drill bits are embedded in the bottom faces of the flange ribs. The coaxiality and the integral rigidity of the drilling tool are improved by means of the flange rib type drill bits, and vibration of the drilling tool during drilling is reduced; in addition, the rock core sampling quality and efficiency of quaternary loose strata, bed rock weathering zones and coal seam outcrops are remarkably improved; and meanwhile, the drilling efficiency is improved.

The invention discloses a flameless combustion chamber for a Stirling engine and an implementation method of the flameless combustion chamber. The flameless combustion chamber comprises a combustion chamber housing, a combustor and a heat exchanger; the housing consists of an upper housing part and a lower housing part; an exhaust pipe is arranged at the top of the housing; a heat exchanger barrelis arranged at the bottom of the housing; the lower housing part is connected with the top of the heat exchanger barrel into a whole; the top of the heat exchanger barrel, the lower housing part andthe upper housing part form a combustion chamber space; a hot cavity of the Stirling engine is formed in the lower end of the heat exchanger barrel; the top of the heat exchanger barrel separates thecombustion chamber from the hot cavity; the combustor and the heat exchanger are arranged in the housing from the top to the bottom sequentially; the heat exchanger comprises a circle of heat exchangepipes arranged in a reverse-U-shaped manner; and one ends of the heat exchange pipes communicate with the hot cavity of the Stirling engine, and the other ends of the heat exchange pipes communicatewith a reheater, thus a circuiting working medium system is formed. The implementation method comprises the step that the combustion chamber is used for combustion. The flameless combustion chamber and the implementation method have the characteristics that the combustion chamber is uniform in temperature, the combustion efficiency is high and the safety and reliability are achieved. The flamelesscombustion chamber is particularly suitable for the Stirling engine for use.

The invention provides a waste heat recovery system for a cement production grate cooler employing square equipment. The grate cooler comprises a housing and a clinker channel, wherein a thermal insulation material is arranged between the housing and the clinker channel; waste heat recovery equipment is arranged in the thermal insulation material, and comprises at least one barrel; a heat exchange tube is arranged in the at least one barrel; the barrel is a rectangle; a plane is arranged at the lower part of the barrel. According to the grate cooler provided by the invention, sensible heat released by a clinker in a cooling machine in a fast cooling process can be fully absorbed; energy consumption of the clinker is reduced; the waste heat utilization rate can also be effectively increased.

The invention discloses a device for removing NOX from smoke by combining ammonia agent spraying and built-in catalytic reaction. The device comprises a combustion chamber, a cyclone barrel, a boiler steering chamber, a high-temperature economizer, a low-temperature economizer and an air preheater which are sequentially connected with one another, wherein the middle part of the combustion chamber is communicated with a tertiary air pipe; and a furnace arch is arranged on the upper part in the combustion chamber. The device also comprises a first layer spraying gun arranged in the tertiary air pipe, a second layer spraying gun which is arranged on the wall of the combustion chamber and is positioned at the furnace arch, a third layer spraying gun arranged at an inlet of the cyclone barrel, and catalyst beds which are built in spaces between the high-temperature economizer and the low-temperature economizer and between the low-temperature economizer and the air preheater and is used for carrying silicon controlled rectifier (SCR) denitration catalysts. According to the device, by improving the arrangement way of a reducing agent spraying gun, the smoke denitration efficiency is improved and the denitration cost is reduced; the device is particularly suitable for denitration improvement of circulation fluidized bed boilers with a limited space and preliminary NOX discharging concentration being higher than 400 mg/Nm<3>.

The invention belongs to the field of casting and mainly relates to a casting method capable of preventing defects of an air cylinder casting pipe orifice. When the pipe orifice part is casted in theprior art, one loop of cold iron is adopted, and the casting defects such as shrinkage porosity and slag inclusion exist among the cold iron through RT ray detection; in consideration of the above problem, the invention provides a casting method capable of preventing casting defects for an air cylinder casting pipe orifice part. The casting method comprises: a casting process scheme of placing theair cylinder casting with the upward combined surface and the downward pipe orifice is selected, a crossed riser neck is arranged at the radial part of the air cylinder casting pipe orifice, a blindriser is arranged at the middle position of the crossed riser neck, and partitioned cold iron is arranged on the end face part of a crossed riser neck feeding superposed area of the air cylinder casting pipe orifice, so that the casting defects such as shrinkage porosity, slag inclusion and crack on the air cylinder casting pipe orifice part are effectively avoided, the quality of the air cylindercasting is improved, and the standard requirement for the RT ray detection first level of the air cylinder casting pipe orifice part is met.

The invention relates to a dust removing-denitration integrated device and method for medium- and low-temperature flue gas. The device includes a dust removing purification unit, an ammonia-air mixingand injecting unit, a heat exchange unit and a denitration unit which are arranged in a column body in order from bottom to top. The lower part of the column body of the dust removing purification unit is provided with a plurality of air inlets along the circumferential direction. Each air inlet is connected to one end of a flue gas feeding pipe through an air feeding branch pipe. The other end of the flue gas feeding pipe is connected to a desulfurated flue gas outlet of an outer desulfuration unit. Air inflow evenly-distributing guide plates and filter bags are disposed in the column body of the dust removing purification unit. A plurality of rows of the filter bags are evenly and vertically distributed in the column body. The air inflow evenly-distributing guide plates are disposed between the air inlets and the filter bags. Pulse-jetting apparatuses are arranged above the filter bags, and are connected to an outer compressed air conveying pipe. The device and the method integratedust removing, heat exchange and denitration, and are high in dust and NOx removing efficiencies. The device is simple in structure, reliable to operate, low in investment and operation cost, and longin service lifetime.

The invention relates to a wear-resisting small eccentric V-ball regulating valve special for salt chemical engineering. The wear-resisting small eccentric V-ball regulating valve comprises a valve body, a packing box is machined on the valve body, a packing seal assembly, a packing gland and a packing pressing plate are sequentially arranged in the packing box and connected with the valve body in a fastening mode; a small eccentric valve ball is concentric with a transmission shaft and a driven shaft, the small eccentric valve ball is connected with the transmission shaft and the driven shaft and arranged in the valve body, an upper bush and the transmission shaft are arranged in the valve body from the top, a lower bush and the driven shaft are arranged in the valve body from the bottom, and a valve seat and a pressing ring are arranged in the valve body from the side face; a first distance adjustment pad and a second distance adjustment pad are arranged on the upper end face and the lower end face of the small eccentric valve ball; a first C-shaped seal ring is arranged in a clamping groove between the valve body and the first distance adjustment pad; a first supporting ring is arranged between the upper bush and the lower bush, and a second supporting ring is arranged between the first C-shaped seal ring and a second C-shaped seal ring. According to the wear-resisting small eccentric V-ball regulating valve, blocking of a flow channel of the valve body can be effectively prevented, corrosion of a cavity by crystals can be effectively prevented; the adjustment accuracy of the valve can be improved; scouring and corrosion of media on the valve body and components in the valve can be reduced; particle media can be prevented from entering valve shaft gaps, the adjustment accuracy of the valve can be greatly improved, and the service life of the valve can be greatly prolonged.

The invention discloses a biomass double square coil pipe heat conduction oil furnace. Two groups of square coil pipes are parallelly arranged in a smoke chamber in a furnace body, and three side rings of each group of square coil pipes are attached to side walls of the furnace body. The three side rings of each group of square coil pipes are attached to the side walls of the furnace body and one side ring of each group of square coil pipes is disposed at a flame center so that the two groups of square coil pipes are attached to over 90% area of four side walls of the furnace body, the maximum space utilization rate of the smoke chamber is achieved, heating area is increased, double sides of the side rings of the flame center are heated, the heat transfer efficiency is increased, meanwhile, the square coil pipes are tightly attached to the side walls so that heating temperature of the side walls is lowered, and the problem in terms of high temperature resistance of the side walls is solved.

The utility model relates to a wear and block preventing method of a moisture meter for high temperature flue gases, which comprises a wear resistant arc baffle sampling apparatus 1), an anti-wear sampling sleeve 2), and an anti-clogging backblowing pipe; wherein, the sampling apparatus can be adjusted at any angles, and comprises an auto-exciting anti-wear sampling sleeve, an anti-wear arc baffle which can be adjusted at any angles; the two devices can be combined into an anti-wear and anti-clogging sampling apparatus of gas flue moisture meter, according to the flow direction of the gas flues and the sampling points for measurement; the sampling device adopts the composite wear resistant coating of SS316 stainless steel as protective layer, and a steam stop sleeve is arranged in the sampling sleeve to prevent the corrosion due to dew condensation on the surface; an air tube is arranged in the auto-clogging backblowing pipe for conducting air backblowing automatically or manually.

The present invention discloses a method for manufacturing lining plastic pipe by using welded connection. The method comprises the following steps: (1) stripping one section of the plastic anticorrosive coating of the lining plastic pipe port that has been subjected to lining plastic recombination, wherein the lining plastic pipe port being stripped the plastic anticorrosive coating is the connection end of the external steel pipe; (2) lining the inner wall of the connection end that is not lined with the plastic anticorrosive coating with a hot melt adhesive, wherein the hot melt adhesive is adhered to the inner wall of the connection end to form a hot melt adhesive layer; (3) inserting a stainless steel pipe into the external steel pipe from the connection end of the external steel pipe, wherein the outer wall of the stainless steel pipe is adhered with the hot melt adhesive layer; and (4) welding the outer wall of the stainless steel pipe and the port of the external steel pipe. The lining plastic pipe manufactured by this method can efficiently solve the problem of electrochemical corrosion after welding the dissimilar steel, solve the structural problem that the steel-plastic pipe cannot directly adopt welded connection, and expands the application of the stainless steel in steel-plastic pipe manufacture.