44results about How to "Extend the period of stable operation" patented technology

The invention provides a method for flushing a reverse osmosis (RS) membrane, which aims at the problems of filtration surface contamination and first-section contamination of a reverse osmosis system membrane caused by high salt, organic colloidal silica, high molecular organic contaminants and microbiological remains during reverse osmosis treatment of olefin production process water, circulating cooling water and sewerage. In the method, positive flushing and concentrated water side reverse flushing are adopted, and agents such as an organic solvent and the like are matched, so hydraulic flushing is formed on the RO membrane filtration surface, blocking contaminants on the membrane surface which cannot be chemically removed are obviously removed, the problem of the first-section contamination of a membrane system is solved, and stable running period of the RO system is prolonged.

The invention relates to an oil refining catalyst wastewater zero-discharging treatment method. The oil refining catalyst wastewater zero-discharging treatment method comprises the following steps that (1) oil refining catalyst wastewater is treated in a high-density sedimentation tank to obtain sedimentation wastewater; (2) the sedimentation wastewater is fed into a multi-media filter to obtain produced water of the multi-media filter; (3) the produced water of the multi-media filter is fed into an ultra-filtration system and is further treated to obtain ultra-filtration water; (4) the ultra-filtration water is regulated to be weak-acidic and then is fed into a sea water desalination type reverse-osmosis system, and reverse-osmosis concentrated water is obtained through treatment; (5) the reverse-osmosis concentrated water is fed into an efficient electrodialysis system for concentration or into a conventional reverse-osmosis system for reverse osmosis respectively according to the salt content of the reverse-osmosis concentrated water; (6) the electrodialytic concentrated water is fed into a mechanical vapor compression (MVR) evaporator for concentration, the concentrated liquid is fed into a waste heat multiple-effect evaporative crystallization system, further evaporative concentration and crystallization are conducted on the concentrated wastewater, centrifugal dewatering is conducted on the concentrated liquid to obtain solid salt for recycling, and the produced water is reused. The oil refining catalyst wastewater zero-discharging treatment method is obvious in treatment effect and low in operation cost.

The invention provides a production device and a production process for producing linear alpha-olefin through ethylene selective oligomerization, and belongs to the technical field of homogeneous catalysis. The device comprises a raw material pretreatment unit, a reaction unit and a separation unit, the reaction unit comprises a reaction kettle, a circulating fan, a primary condenser, a primary condensate tank, a secondary condenser and a secondary condensate tank which are sequentially communicated, and the primary condensate tank is communicated with the separation unit; the secondary condensate tank is communicated with a reaction kettle; a temperature sensor is arranged in the reaction kettle, a gas regulating valve is arranged between the primary condenser and the circulating fan, the gas regulating valve and the temperature sensor are interlocked, and the opening degree of the regulating valve is controlled through the temperature of the reaction kettle. The process and the device are mainly used for an ethylene oligomerization process, and have the characteristics that the activity of the catalyst is promoted to be improved, the selectivity of linear alpha-olefin is improved, the secondary reaction degree in which the product participates is low, high-carbon byproducts are few, and the reaction heat removal capability is strong.

The invention relates to a sulfuric acid tail gas desulphurization device and method. A multi-layer spraying, cleaning and defogging device and anti-blocking design are adopted in a desulphurization tower, and the three functions of desulphurization, cleaning and defogging are integrated by the tower. The bottom of the desulphurization tower is connected into a liquid outlet pipe and a circulating pump. The circulating pump is connected to a mixing device through a pipe. The mixing device is connected with an ammonia water pump through a pipe and connected into an ammonia water tank. Circulating solutions in the tower are ammonium sulfite and ammonium hydrogen sulfite. The higher desulphurization efficiency can be reached. The mixing device is connected into a first-level oxidation tank through a pipe and connected into a second-level oxidation tank. Secondary hydrogen peroxide oxidation outside the desulphurization tower is conducted, an ammonium sulfite solution and hydrogen peroxide fully react with each other through stirring of the air, the oxidation rate of the ammonium sulfite can reach over 98%, the quality of a by-product ammonium sulfate solution is guaranteed reliably, absorption, adjustment and oxidation are conducted on sulfuric acid tail gas, ammonium sulfate is generated, operating devices are fewer, and low power consumption and the energy-saving effect are achieved.

The invention relates to a solid-containing heavy oil vacuum distillation apparatus and method. The method comprises: (1) performing vacuum flashing treatment on bottom oil containing solids under atmospheric pressure to obtain flash top gas and flash bottom oil, and (2) directly feeding the flash top gas into a vacuum tower, heating the flash bottom oil and feeding the flash bottom oil into the vacuum tower. The apparatus and method guarantee the extraction rate of the vacuum distillation tower, reduce the wear and corrosion of the solid particles in the oil component to the vacuum furnace and the furnace tube, improve the operation cycle of the vacuum furnace and improve the economic benefits.

The invention discloses an environmental-friendly roof system capable of generating electric energy, and application of the system and belongs to the field of environment conservation and new energy. The environmental-friendly roof system comprises a soil layer, plants planted in the soil layer, a water layer above the soil layer, and a plurality of cell units, wherein each cell unit comprises a positive electrode and a negative electrode which are connected with each other by virtue of a lead; the positive electrodes are embedded in the soil layer, and the negative electrodes are positioned in the water layer; the root systems of the plants are close to the positive electrodes, and the stem leaves of the plants penetrate through the negative electrodes and are above the water layer; and the plurality of cell units are connected with one another by leads and then are connected with an energy storage device which is connected with a load. According to the invention, soil microorganisms can convert solar energy into electric energy in an electrochemistry system, so that the environmental-friendly roof system is environment-friendly and has high energy utilization efficiency. The environmental-friendly roof system has a simple structure, depends on natural resources, does not need too much daily maintenance, is low in construction and running cost, and is suitable for promotion in modern cities.

The invention discloses a telescopic guide rail integrated with a cable collection function, and relates to the field of guide rails. The telescopic guide rail comprises a plurality of groups of guide rail components, wherein the guide rail components comprise guide rail back sheets; soft connection belts are arranged in the guide rail back parts; cables are arranged in the soft connection belts; guide rail pushing-pulling grooves are formed in guide rail front sheets; the guide rail pushing-pulling grooves are in slide fit with case fixing bars; the case fixing bars are connected with a pulling box; and the pulling box is connected with the soft connection belts. Through adoption of the telescopic guide rail, cables are arranged on two sides of a machine in a tidy and attractive way. Compared with a conventional back-end lead groove design, the telescopic guide rail has the advantages that heat dissipation at a back end of the machine is facilitated more; the aging time of the machine is prolonged; and the stable running period of the machine is prolonged. Cables of the machine can be identified more easily, and faulty operations such as wrong unplugging and wrong plugging are avoided. Mutual signal interference can be avoided through classified arrangement of strong current cables and weak current cables.

The present invention relates to a coal pyrolysis flue gas control treatment equipment continuous operation period prolonging method and a coal pyrolysis flue gas control treatment equipment continuous operation period prolonging apparatus, and provides a coal pyrolysis flue gas control treatment equipment continuous operation period prolonging method, which comprises: (i) carrying out pre-separation treatment on raw material flue gas in a coal pyrolysis process through micro-swirling flow separation to remove large-particle-size catalyst particles from the flue gas; (ii) carrying out gas flowbalancing on the obtained flue gas, and feeding into the particle bed of a boiling bed separator to filter out fine particles entrained in the flue gas; and (iii) discharging the clean flue gas obtained through the two filtrations so as to be processed and utilized. The invention further provides a coal pyrolysis flue gas control treatment equipment continuous operation period prolonging apparatus.

The invention relates to a method and a device for secondarily filtering a doctor solution by side stream, and belongs to the technical field of purification of the doctor solution of synthesis ammonia. The method adopts a doctor solution side-stream filter process, and desulfurizes the doctor solution by a doctor solution side-stream filter system and a filter regeneration system which regenerates the filter system; and the device consists of the doctor solution side-stream filter system and the filter regeneration system. The invention is suitable for tannin extract normal pressure desulfurization systems; and after the doctor solution shunted on a doctor solution main pipeline is desulfurized by the device, suspending sulfur and secondary salt contents in deficient liquid after the desulfurization can be effectively reduced, and phenomenon of tower blockage of a desulfurizing tower is reduced. The method and the device not only improve the desulfurization efficiency of the tannin extract desulfurization systems and prolong the stable operation cycle of the systems, but also reduce the discharge of the doctor solution due to tower cleaning; and the suspending sulfur particles after the desulfurization are not discharged and have no pollution, the phenomenon of the tower blockage of the desulfurizing tower is reduced, and the system is stably operated in a long cycle; and the method and the device realize online operation and online back washing, and optimally configure a back washing solution to prevent the back washing solution polluting the environment.

The invention belongs to the technical field of sym-trimethylbenzene refining, and particularly relates to a method for purifying sym-trimethylbenzene through thermal coupling, a purification part and a thermal coupling part are included, and the purification part mainly comprises a decarburization tower A, a pretreatment tower B, a light component removal tower C, a heavy component removal tower D, an extractive distillation tower E, a solvent desorption tower F and a buffer tank O; the thermal coupling part comprises the following steps: heating a 1, 2, 4-trimethylbenzene tower H, a light component removal tower C and a heavy component removal tower D by utilizing tower top gas phase material flow heat energy of a pretreatment tower B; and a composite solvent of glycerol and dimethyl sulfoxide is introduced into the extractive distillation tower E. According to the invention, through a thermal coupling means, gas phase latent heat at the tower top is fully utilized, steam condensate and heat thereof are also fully utilized, energy consumption is reduced, the cost of the adopted solvent is relatively low, the boiling point is also relatively low, and the method is suitable for industrial production. The operation temperature required in the operation process is low, the cost is reduced, the energy consumption is reduced, and the method is easy to recycle.

The present invention provides an apparatus and a method for a microwave enhanced membrane distillation process. According to the present invention, a microwave reaction chamber for microwave and negative pressure operation is manufactured, and comprises six parts such as a chamber, a chamber top cover, a microwave head interface, a component fixation flange, a pressing flange and a membrane head locking member; a membrane assembly for operation in a microwave field is designed and manufactured, penetrates through the component fixation flange on the chamber, and is fixed through the pressing flange, the membrane head locking member, a silica gel gaskets and other accessories; a microwave magnetron is connected with the chamber top cover through the microwave head interface so as to achieve a microwave environment in the chamber; and a water circulating pump, steam catching, condensation and other equipment are complemented so as to achieve organic combination of microwave radiation, the membrane assembly and the membrane distillation process, such that the microwave enhanced membrane distillation process can be achieved, and microwave-assisted online cleaning and drying of pollution films can be concurrently achieved.

The invention discloses a catalyst feeding programmed control system and method, and belongs to the technical field of program control. The system comprises a catalyst feeding pipeline (1), a separator (2), a stock bin (3), a vacuum pump (4) and a DCS program control unit (8), wherein the lower end of the separator (1) is connected with the stock bin (3) through a discharging pipeline (21), the discharging pipeline (21) is provided with a third control valve (31), and the separator (2) is connected with a gas pressurization pipeline (5); a gas purging pipeline (6) is connected to the third control valve (31), a purging electromagnetic valve (61) is arranged on the gas purging pipeline (6), a hole is formed in the top of the separator (2), a pressure transmitter (7) is installed in the hole, and a DCS program control unit (8) is connected with the first control valve (11), the second control valve (42), the third control valve (31), the fourth control valve (51) and the purging electromagnetic valve (61). According to the invention, the automatic unblocking of the system is realized by additionally arranging pressure interlocking and a purging gas circuit and redesigning an interlocking program.

The invention discloses a preparation method of 3-methyl-2-butenal, which comprises the following steps: mixing air of which the O2 concentration is controlled below the limit oxygen concentration of unsaturated alcohol with unsaturated alcohol steam, introducing the mixture into a fixed bed reactor filled with an oxidation catalyst, and carrying out gas-phase catalytic oxidation to prepare 3-methyl-2-butenal, the unsaturated alcohol is 3-methyl-2-butenol, 3-methyl-3-butenol or a mixture of the 3-methyl-2-butenol and the 3-methyl-3-butenol. The method provided by the invention can greatly prolong the stable operation period of a reaction device, is beneficial to reducing the process operation cost, and has a good industrial prospect.