42results about How to "Long-term normal operation" patented technology

The invention discloses a permanent magnet brushless motor comprising a rotor with a dustproof structure, comprising a housing (3), a stator, a permanent magnet rotor (4), a rotor shaft (5), a cooling fan (14), and an end cap (17). The housing (3) is provided with an air inlet (8) and an air inlet (15). The stator includes a stator core (1) and an electromagnetic winding (2). The air inlet (8) side of the housing (3) is provided with a dust cover (7), and the dust cover (7) faces the end face of the stator core (1). The stator core (1) is provided with an isolating slot wedge (10) matched with openings of electromagnetic winding slots (11), and the isolating slot wedge (10) is made of insulating material. The isolating slot wedge (10) and the dust cover (7) are mutually sheathed, and the isolating slot wedge (10) and the teeth of all the electromagnetic winding slots (11) constitute a closed stator inner circle. By adopting the structure, the permanent magnet brushless motor of the invention has the advantages of simple and reasonable structure, convenient installation, good sealing performance of the rotor, capability of avoiding iron powder and iron filings adsorption on the surface of the permanent magnet rotor (4), long service life, and the like.

The invention discloses a stable compact type laser-transceiving integrated detection light path structure. The stable compact type laser-transceiving integrated detection light path structure comprises a laser transceiving device and a pyramid reflector device, wherein laser output by a host laser of a monitor is coupled by an external transmission optical fiber flange, so as to enter a tail fiber in a covering cylinder, the laser is conducted to a laser alignment mirror by the tail fiber, the laser is emitted from a receiving mirror in a center opening after being aligned, passes through a sealing window mirror and a target gas detection area and then arrives at an opposite pyramid reflector of the pyramid reflector device, so as to form a reflected light beam and return along the direction of a main light path, the extended return light beam is received and laterally reflected and focused by the receiving mirror, so as to arrive at a receiving lens and a detector which is used for detecting an optical signal of a receiving spectrum, and an electrical signal output by the detector is transmitted to an output interface by virtue of a connecting wire and then transmitted to a host by virtue of an external cable. According to the stable compact type laser-transceiving integrated detection light path structure, a spectral absorption optical path is doubled, the detection precision can be increased, the application range can be extended, and the anti-vibration performance is obviously improved.

The invention discloses a silicone rubber having high resistance to electric erosion and used for an insulator and a preparation method thereof. The silicone rubber comprises the following raw materials: methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, fumed silica, aluminum hydroxide, zinc borate, aluminum oxide, a silane coupling agent, a structure control agent, hydrogen-containing silicone oil, vinyl silicone oil, zinc oxide, stearic acid, stearate, triethanolamine, tetrafluoroethene powder, an ultraviolet ray absorber, color masterbatch and a vulcanizing agent. The invention also provides the preparation method for the silicone rubber having high resistance to electric erosion and used for the insulator. The silicone rubber provided by the invention has high flame resistance and high resistance to tracking and electric erosion while meeting standard requirements for mechanical properties, hydrophobicity and weatherability of silicone rubber used for insulators; and the silicone rubber can guarantee long-term normal working of a composite insulator and improve the service life and operation safety of the composite insulator. The preparation method is simple, has low cost and is suitable for large-scale industrial application.

A tubular pile type ground source heat pump system is applied to construction heating, comprising a low-temperature heat source end, a ground source heat pump set and a radiating tail end; the system can be used in winter and summer; during heating, low-temperature hot water at an evaporator end of the ground source heat pump set is discharged into a hollow pipe of a concrete tubular pile embedded underground through a pipeline, and then, low-temperature hot water is heat-exchanged with the ground through the tubular pile wall; after heated, the low-temperature hot water is extracted to the evaporator end of the ground source heat pump set to be used as a low-temperature heat source, thereby realizing heating of the ground source heat pump system. The tubular pile type ground source heat pump system is capable of heating in winter while cooling in summer, and can ensure heat balance of underground soil; simultaneously, the system can solve the problems that the groundwater system lacks water and a soil pipe system has large floor area, thereby saving energy and protecting environment.

The invention discloses an oil cylinder, which includes a piston shaft, a front flange, a cylinder body, a locating sleeve, and a rear flange, wherein the front flange, the cylinder body, the locating sleeve, and the rear flange are sequentially arranged on the piston shaft in a penetrating way, and are matched and connected with each other; and a piston, which can perform reciprocating movement, is arranged in the cylinder body, and an oil inlet port and an oil outlet port are arranged on the cylinder body. By adopting the oil cylinder provided by the invention, a product and discharging oil are completely separated, the oil leakage cannot happen, the service life of the oil cylinder is prolonged, a series of problems caused by the oil leakage are solved, the finished product ratio is improved, the quality of the product is ensured, and the waste of material and the maintenance cost of the equipment are reduced; because an oil discharging channel is arranged, when a sealing part is under limiting wear, oil tightness of a shaft end can be guaranteed; the excess oil discharges from the oil discharging channel designed, so as to play a role of early warning; the oil cylinder has the advantages of simple structure, convenience in assembly, and firm combination among each component, and can ensure the machine to operate normally for a long term with small failure rate; and the oil cylinder has small and aesthetic appearance, and wide application range, and can replace the ordinary oil cylinder to use in various industries in the mechanical field.

The invention discloses a method for increasing butadiene yield. According to the method, carbon-4 cut fraction rich in alkyne after butadiene extraction is utilized as a raw material; under the existence of a catalyst, an adiabatic reactor is utilized, and selective hydrogenation is performed to obtain 1,3-butadiene; utilized hydrogenation operation conditions are that an inlet temperature of thereactor is 20 to 70 DEG C, reaction pressure is 0.8 to 3.0 MPa, and a liquid space velocity is 10 to 30 h<-1>. The catalyst is a palladium-silver-lead series catalyst which is prepared from a nickel-containing aluminum oxide carrier with a specific crystal form, so that dispersity and a utilization rate of active metal can be greatly improved, and hydrogenation performance of the catalyst is improved. The method disclosed by the invention has very obvious good effects on effectively utilizing carbon-4 cut fraction rich in alkyne after butadiene extraction, reducing resource waste and improving economical benefits.

A method of recycling butadiene by alkyne selective hydrogenation, C-4 fraction rich in alkyne after butadiene extraction is taken as material to carry out selective hydrogenation to obtain 1,3-butadiene in an adiabatic reactor under the existence of a catalyst, with the process operation conditions: reaction inlet temperature is 20-60 DEG C, reaction pressure is 0.6-2.5 MPa, space velocity of liquid is 10-25h-1, wherein the catalyst is a palladium-molybdenum catalyst prepared with alumina supporter containing nickel and with specific crystal form that can greatly improve the dispersion and utilization of reactive metal and the hydrogenation performance of the catalyst. The method of recycling butadiene by the alkyne selective hydrogenation has extremely significant good effect on effectively utilization for C-4 fraction rich in alkyne after butadiene extraction, resource waste reduction and economic benefit improvement.

The invention discloses a novel oilless vertical vacuum pump which comprises a base, a machine body, an air cylinder, an air cylinder cover and a flywheel, wherein the air cylinder is arranged above the machine body; a piston and a piston rod are arranged in the air cylinder; an upper packing chamber is formed between an air cylinder neck and the piston rod; an upper packing pressure cover is arranged under the upper packing chamber; a piston ring, a tension ring and a guide ring are arranged between the air cylinder and the piston; the piston rod penetrates through the air cylinder and the air cylinder neck downwards in sequence, and the lower end of the piston rod is in cap connection with a connecting rod through the piston rod; the bottom of the connecting rod is inserted into a cross head; the cross head is connected with an upper end hole of the connecting rod through a cross head pin; a lower end hole of the connecting rod is in circumferential sliding connection with crankshafts on the two sides; the crankshaft on one side is connected with the flywheel through a rotating shaft, and the crankshaft on the other side is connected with a machine oil pump through a machine oil pump joint in the rotating shaft. The novel oilless vertical vacuum pump has the advantages that the novel vertical pump is free from oil stain, is reliable to lubricate, is more stable to run and is convenient to filter, the long-term normal operation of an air valve and the piston is ensured, the service life is long, and the maintenance is convenient.

The invention discloses a kinetic energy electronic wrist strap, comprising a strip-shaped or strap-shaped wrist strap body (2); the wrist strap body (2) is fixedly connected with an RFID (radio frequency identification devices) electronic chip and an electric energy generating device; the electric energy generating device comprises a miniaturized power generator (6), a fly lump part (7) fixedly connected onto a rotor of the miniaturized power generator (6) and an AC / DC (alternative current / direct current) conversion chip (9) of which the input end is connected with the output pole of the miniaturized power generator (6); the output end of the AC / DC conversion chip (9) is connected with the RFID electronic chip. According to the kinetic energy electronic wrist strap, information of a medial indication wrist strap is convenient to write and read, the problem of power exhausting is avoided, and the long-term normal operation of the kinetic energy electronic wrist strap is ensured.

The invention discloses a liquid vinyl chloride monomer dehydration system and a dehydration process thereof. The dehydration system includes a phase separator and an interface automatic control system connected to the phase separator. The phase separator comprises a cylinder, a material inlet end arranged on the upper side of one cylinder end, an inlet member connected to the material inlet end, a rectifier connected to the inlet member, a fiberfill section disposed behind the rectifier and connected to the rectifier, a baffle plate group section arranged behind the fiberfill section, a settling section arranged behind the baffle plate group section, a small cylinder disposed outside the cylinder bottom, and a light phase outlet arranged at the top of the cylinder. The dehydration system provided by the invention has the characteristics of simple structure, convenient use, and high working efficiency. And the phase separator employed by the dehydration process involved in the invention is static equipment, can realize efficient dehydration without any external force, the inside of the device adopts an efficient modular separation structure, the equipment size is effectively reduced, and at the same time sufficient residence time is satisfied. During vinyl chloride dehydration, the occurred self-aggregation phenomenon does not block the equipment, and long-term normal operation of the separation equipment can be ensured, thereby reducing the water phase content of liquid vinyl chloride monomer to a lowest level.

The invention discloses a heat, electricity and fertilizer coproduction system for edible mushroom dreg. The system comprises a mushroom bag breaker, a sorting machine and a roller drier which are connected in series sequentially, wherein a medium inlet of the roller drier is connected with a hot-blast furnace. The system is characterized in that a material outlet of the roller drier is connected with a rotary discharging bin through a screw feeder and an elevator, a discharging opening of an additive screw conveyor is connected with a charging opening of the screw feeder, the rotary discharging bin is in series connection with a derived fuel pelletizer, a cooler and a gasifier behind sequentially, and an outlet of the gasifier is connected with a fuel gas exhaust-heat boiler through a settlement type purifier and a draught fan. The invention further discloses a heat, electricity and fertilizer coproduction process for the edible mushroom dreg. According to the system and the process, the mushroom dreg can be treated industrially in time, the pollution to environments is prevented, the resource expenditure is low, the value of products is high, continuous production and long-term normal operation are achieved, the comprehensive economic benefit is improved, and the resource utilization of the mushroom dreg can be achieved.

The invention discloses a method of recycling butene by alkyne selective hydrogenation, wherein the method takes C-4 fraction rich in alkynes after butadiene extraction as raw material to carry out alkynes and akadiene selective hydrogenation to obtain butene an adiabatic reactor under the action of catalyst, with the process operation conditions: reactor inlet temperature is 25-100 DEG C, reaction pressure is 0.6-2.5 MPa, space velocity of liquid to be 15-25h<-1>, wherein the catalyst is palladium-molybdenum-silver selective hydrogenation catalyst prepared with alumina supporter containing nickel and with specific crystal form that can greatly improve the dispersion and utilization of reactive metal and the hydrogenation performance of the catalyst. The method of recycling butene by the alkyne selective hydrogenation has extremely significant good effect on effectively utilization for C-4 fraction with rich alkynes after butadiene extraction, resource waste reduction and economic benefit improvement.

The invention discloses a method for reducing vibration of a high-pressure compressor and a vibration damper used in the method. The method comprises the following steps that a concrete base layer is manufactured, vibration damping units from the first to the sixth are installed on a reinforcement mesh; circular holes for threaded rod leveling are drilled in the four end corners of lower steel plate, and threaded holes are correspondingly machined in connecting steel plates according to the positions of the circular holes; threaded rods penetrate through the circular holes, the bottom ends of the threaded rods are in threaded connection with the connecting steel plates and are welded to the connecting steel plates, and each threaded rod is in threaded connection with a first regulating nut, a second regulating nut and a locking nut; vibration damping pads of all vibration damping units are placed on the reinforcement mesh together with the connecting steel plates, all the connecting steel plates are wielded to the reinforcement mesh, and all the six vibration damping pads are leveled; a concrete covering layer is manufactured; and bases of the high-pressure compressor are welded to the upper steel plates on the vibration damping pads. The invention further provides the vibration damper. By means of the method for reducing vibration of the high-pressure compressor and the vibration damper used in the method, vibrations of the high-pressure compressor are obviously reduced, the vibration numerical value of the vibrations of high-pressure compressor is substantially reduced, and it is guaranteed that the high-pressure compressor can normally operate in long time.

The invention relates to the technical field of vehicle-mounted equipment, in particular to an automatically-cleaned vehicle-mounted air filter. The automatically-cleaned vehicle-mounted air filter has the advantages that impurities which are intercepted during filtering of the interior of the equipment can be automatically and synchronously cleared, and blocking of the impurities on the interiorof the equipment can be effectively prevented, so that convenience is provided for enabling the equipment to normally work for a long time, the service life of the equipment is prolonged, and the practicability and the reliability are improved. The vehicle-mounted air filter comprises a material guiding bin, a separation bin, an air inlet pipe and a rotating shaft, wherein the lower side of the material guiding bin is configured to be conical; the separation bin is positioned on the upper side of the interior of the material guiding bin; the top of the separation bin penetrates through the topof the material guiding bin and extends out of the upper part of the material guiding bin; the top of the separation bin is close to the top of the material guiding bin; multiple groups of through holes are uniformly formed in the lower side of the outer side wall of the separation bin in an arc shape and in a communicating manner; and material guiding trough plates are arranged on the outer sides of each group of through holes.

The invention discloses a garden waste recovery device. A second shell is mounted at the upper end of a first shell. A feeding hopper is arranged in the middle of the upper end of the second shell. The middle in the feeding hopper is connected with a supporting plate. A drive machine is located in the middle of the upper end of the supporting plate, and the lower end of the drive machine is connected with a first rotating shaft. The two sides of the middle of the first rotating shaft are connected with first-stage crushing rods. The positions, facing the vertical axis of the second shell, of second rotating shafts are connected with driven wheels, and the driven wheels are connected with the first rotating shaft through a driving wheel. Scraping plates are mounted on the front side walls and the rear side walls of grinding bins. The positions, facing the vertical axis of the first shell, of boxes are connected with second pipes. According to the garden waste recovery device, fallen leaves in a garden are subjected a series of grinding and crushing operations, and residues generated after the fallen leaves are ground can be used as fertilizer of trees in the garden; and the device is efficient and rapid, a large number of fallen leaves can be treated within short time, and practicality is increased.

The invention discloses a SVG secondary power acquisition method. The external 380V power supply is led to the connection terminal of the control cabinet, connected to the input of the UPS through a single-phase circuit breaker, and the output of the UPS is connected to the 220V incoming line of the control box. terminal. At the same time, the output of the UPS is led to the wiring terminals of each power unit through a contactor; and then led to the power supply terminals of the module control board through the isolation transformer. The present invention provides stable 220V control power to the control box through the UPS, has the dual functions of isolation and filtering, and improves the anti-interference ability of power supply; the module power supply provides 220V power supply to the power unit through the isolation transformer and the module control board, and realizes the isolation of high and low voltage , At the same time, the module control board is designed with the function of power failure protection, which has the advantage of reliable power supply.

The invention discloses a steel-lining nylon carrier roller. The steel-lining nylon carrier roller is composed of a through shaft, a cylinder and two rolling bearing assemblies. The two rolling bearing assemblies are arranged at the two ends of the through shaft. The through shaft is sleeved with the cylinder. The two ends of the cylinder are assembled with the rolling bearing assemblies respectively in an airtight mode. The cylinder is of a structure of a reinforced nylon outer cylinder plus a steel tube lining. The through shaft is composed of a shaft core steel tube and two shaft heads. According to the steel-lining nylon carrier roller, the structure of the nylon outer cylinder plus the steel tube lining is adopted for the cylinder, so that the bearing strength of the carrier roller is increased; the steel tube is wrapped with nylon, in this way, the carrier roller not only has high corrosion resistance, but also has a rigid bearing ability. The through shaft is not only light but also can improve the bearing capacity of the carrier roller. A plurality of dustproof, seepage-proof and corrosion-proof measures are adopted on the outer side of a bearing, so that the corrosion-proof and dustproof properties of the carrier roller are ensured, and no pollutants enter the cylinder of the carrier roller; therefore, the carrier roller can function normally for a long time.

The invention relates to an automatic sand flushing device, which includes an automatic sand removal plate, a plurality of back flush water pipe sets, a back flush inlet pipe, switch valves, a plurality of spray nozzles, an ultrasonic mud-water interface instrument and an automatic control system. The automatic sand removal plate is fixedly disposed at the bottom of an electrical desalting tank inner wall, the plurality of back flush water pipe sets are disposed in the electrical desalting tank and positioned above the automatic sand removal plate, each back flush water pipe set comprises a plurality of back flush water pipes, and the spray nozzles are all arranged on the back flush water pipes. The back flush inlet pipe is communicated with the back flush water pipes, and the switch valves are arranged in the back flush inlet pipe. The ultrasonic mud-water interface instrument is disposed at the bottom of the electrical desalting tank to detect the thickness of silt deposited in the electrical desalting tank. Also, both the ultrasonic mud-water interface instrument and the switch valves are in signal connection with the automatic control system. When the ultrasonic mud-water interface instrument detects that the electrical desalting tank bottom silt exceeds a threshold thickness, the automatic control system opens the switch valves so as to flush the silt at the electrical desalting tank bottom.

The invention discloses a glass cover extactor hood including a smoke-collecting cavity, a side ventilation inner wall, a side intake air cover, a control box, a fan, a composite filter screen, a filter medium, an oil tray, a glass cover and an oil pump or the like. The glass cover is arranged at the lower end of the smoke-collecting cavity and is fixed. A motor is arranged at an upper part in the smoke-collecting cavity. The lower part of the motor is connected to the fan. The invention is characterized in that a fixed plate is fixed under the smoke-collecting cavity of the glass cover extactor hood, one side intake air cover is respectively fixed on the left side and the right side out of the fixed plate, the side ventilation inner wall is fixed at the middle, the lower end of the side intake air cover is connected to an oil tank, the periphery of the lower end of the side ventilation inner wall is arranged in the oil tank, and the control tank is arranged in front of the side intake air cover. The invention has the advantages of concise and beautiful appearance due to the inner-hidden filter screen and an oil cup, small volume and energy consumption, small noise and easy and convenient unpicking and washing, long service life, high oil and smoke absorption efficiency, and clean and hygienic exhausted air. Two side suction is strong to match the characteristics that stoves are arranged at two sides of kitchen range, so that the oil and smoke is not spilled.

The invention relates to an active ultrasonic expelling generator and belongs to the technical field of safety protection for transmission lines. A pyroelectric sensor, a red and blue laser lamp, an infrared sensor and an ultrasonic speaker are arranged on each of four side surfaces of a shell, the pyroelectric sensors and the infrared sensors are connected with signal input ends of a control unit, control output ends of the control unit are connected with the red and blue laser lamps and the ultrasonic speakers, a communication port of the control unit is connected with an SIM / GPS positioningmodule, the control unit is arranged in the shell, a solar panel is arranged at the top of the shell and connected with a storage battery, the storage battery is connected with power ends of the control unit, the pyroelectric sensors, the red and blue laser lamps, the infrared sensors and the ultrasonic speakers through a DC-DC boost module, a control switch is connected between the storage battery and the DC-DC boost module, and the control switch is fixed to the shell. The active ultrasonic expelling generator is reasonable in structural design and good in expelling effect, and can timely feed equipment failure conditions back to a worker and guarantee the normal operation of equipment.

A method for recovering butadiene by selective hydrogenation of alkynes, using the C4 fraction rich in alkynes after extraction of butadiene as a raw material, in the presence of a catalyst, using an adiabatic reactor, selective hydrogenation to obtain 1,3 ‑Butadiene, the operating conditions of the process are as follows: the reaction inlet temperature is 20-60°C, the reaction pressure is 0.6-2.5MPa, and the liquid space velocity is 10-25h ‑1 . The catalyst is a palladium-molybdenum catalyst prepared on a nickel-containing alumina carrier with a specific crystal form, which can greatly improve the dispersion and utilization of active metals, and improve the hydrogenation performance of the catalyst. Adopting the method of the invention has very obvious good effects on the effective utilization of the C4 fraction rich in alkynes after the extraction of butadiene, the reduction of waste of resources and the improvement of economic benefits.

The invention discloses a flow monitoring method for refrigerating units and a device thereof, and belongs to the technical field of preparation, transmission and distribution of air conditioner chilled water. The method comprises the steps that cooling water flow value information and chilled water flow value information in each target refrigerating unit are obtained, and corresponding equipment identification information is obtained; whether the chilled water flow value information is in a corresponding chilled water threshold range or not is judged according to a preset corresponding relation among basic identification information, a chilled water threshold range, a chilled water threshold range, chilled water pipeline coordinate graph information and chilled water pipeline coordinate graph information of each set of target refrigerating unit; and the chilled water flow value information is compared with the corresponding chilled water threshold range to judge whether the chilled water flow value information is within the corresponding chilled water threshold range. The technical effects that the flow of the chilled water and the flow of the cooling water in a large number of chilled water refrigerating units can be monitored and adjusted in time, and the operation safety is improved are achieved.

The invention discloses a manual and electric proportional control load-sensitive multi-way valve comprising an oil inlet valve body, two or more electric proportional reversing valves and an oil return valve body. A pilot pressure reducing valve connected with a system oil inlet is further arranged in the oil inlet valve body and further connected with pilot oil inlets of all the electric proportional reversing valves. A system pilot oil return opening connected with pilot oil return openings is further formed in the oil return valve body. An in-valve load feedback oil way and a shuttle valveare further arranged in each electric proportional reversing valve, and one of the in-valve load feedback oil ways is connected with a load feedback oil opening. The in-valve load feedback oil way ofeach electric proportional reversing valve is connected with a valve seat inner cavity of the corresponding shuttle valve. Inner cavities on the two sides of a valve element in the valve seat of eachshuttle valve are connected with inner cavities of two working oil openings of the corresponding electric proportional reversing valve and the in-valve load feedback oil way of the adjacent electricproportional reversing valve on the rear portion of the electric proportional reversing valve correspondingly. The manual and electric proportional control load-sensitive multi-way valve has the advantages of being relatively simple in structure, convenient to manufacture and low in cost, the working stability, coordination and reliability of a plurality of actuators are quite excellent, control precision is high, and long-term normal operation of a system can be guaranteed.

The invention discloses a flood and silt prevention method for a large-scale musical fountain in a natural river basin. Downstream, the convex bank refers to the river bank whose shoreline is convex toward the direction of the river, and the concave bank refers to the river bank whose shoreline is concave toward the direction away from the river; the river bottom of the river area corresponding to the convex bank and the concave bank is riprapped and silted, that is, Lay silting stones; build diversion walls in the river area corresponding to the convex bank, and install floating row for large musical fountains in the river area corresponding to the concave bank, so that the floating row is blocked by the diversion wall in the direction of the river. The present invention remarkably improves the preventive ability in terms of flood control and silt prevention by reforming the river bank and the river bottom and constructing the diversion wall, and protects the large music fountain in the natural river basin to be able to operate normally for a long time.

The invention relates to a novel high-efficiency dedusting and desulphurization integrated system process for a coke-tamping, coaling and coke-discharging ground station, comprising the following steps: smoke gas enters a heat accumulating type cooler to be cooled to below 120 DEG C during coal feeding or coke discharging; the cooled smoke gas enters a multifunctional separator and separated tar and a part of large-particle sparkle dust enter a tar settling tank; the smoke gas processed by the multifunctional separator enters a fire resistance bag type dust remover to be filtered; and clean gas is discharged into the atmosphere after filtration. The novel high-efficiency dedusting and desulphurization integrated system process for the coke-tamping, coaling and coke-discharging ground station thoroughly solves the core problems of flammability, explosion proof, hard elimination of toxic gas and high-sulphur coal desulfurization of hard fire cloth bags, tar paste cloth bags and bag-typedust removers, which plague coking enterprises and dust removal enterprises for many years. Proved by practical tests, the dust removal efficiency is more than 99.7 percent, the discharged dust concentration is less than 40mg / m<3>, dust recycled by the ground station is 1400t / a, and smoke and dust are not generated in the production process of a coke oven, thereby completely meeting environmentalrequirements.

The invention discloses a stable compact type laser-transceiving integrated detection light path structure. The stable compact type laser-transceiving integrated detection light path structure comprises a laser transceiving device and a pyramid reflector device, wherein laser output by a host laser of a monitor is coupled by an external transmission optical fiber flange, so as to enter a tail fiber in a covering cylinder, the laser is conducted to a laser alignment mirror by the tail fiber, the laser is emitted from a receiving mirror in a center opening after being aligned, passes through a sealing window mirror and a target gas detection area and then arrives at an opposite pyramid reflector of the pyramid reflector device, so as to form a reflected light beam and return along the direction of a main light path, the extended return light beam is received and laterally reflected and focused by the receiving mirror, so as to arrive at a receiving lens and a detector which is used for detecting an optical signal of a receiving spectrum, and an electrical signal output by the detector is transmitted to an output interface by virtue of a connecting wire and then transmitted to a host by virtue of an external cable. According to the stable compact type laser-transceiving integrated detection light path structure, a spectral absorption optical path is doubled, the detection precision can be increased, the application range can be extended, and the anti-vibration performance is obviously improved.

The invention relates to the technical field of damage and leakage restoration on the tops of a sulphuric acid system boiling furnace, a roasting furnace and a sulfur burning furnace in industries of smelting and the like, in particular to a furnace kiln top leakage restoration method. The overall restoration is carried out through composite restoration leakage blocking agents for furnace top fire-resistant brick layers, then, a layer of substitute heat insulation layer is cast on an integral furnace top by light-weight heat insulation materials, a furnace air leakage source is really restored for ensuring the long-period operation of equipment, under the conditions that the materials are saved, the maintenance time is reduced, the operation is convenient, and the cost is reduced, the real leakage points of the equipment can be effectively restored, the anti-corrosion performance of the equipment is improved, the service life of the equipment is prolonged, and the long-time normal operation of the equipment is ensured.

A method for the selective hydrogenation of alkynes to recover butenes, using the C4 fraction rich in alkynes after the extraction of butadiene as a raw material, in the presence of a catalyst, using an adiabatic reactor to selectively hydrogenate alkynes and dienes The hydrogen is butene, and the operating conditions of the process are as follows: the reactor inlet temperature is 25-100°C, the reaction pressure is 0.6-2.5MPa, and the liquid space velocity is 15-25h ‑1 . The catalyst is a palladium-molybdenum-silver selective hydrogenation catalyst prepared on a nickel-containing alumina carrier with a specific crystal form, which can greatly improve the dispersion and utilization of active metals and improve the hydrogenation performance of the catalyst. Adopting the method of the invention has very obvious good effects on the effective utilization of the C4 fraction rich in alkynes after the extraction of butadiene, reduction of waste of resources and improvement of economic benefits.