32results about How to "Timely and effective removal" patented technology

The invention discloses a surface microporous SiC ceramic material, which consists of main raw materials, polycarbosilane and carboxymethyl cellulose, wherein the main raw materials consist of the following components in percentage by weight: 85 to 90 percent of silicon carbide powder and 10 to 15 percent of yttrium aluminum garnet; the polycarbosilane is 5 to 10 percent of the total weight of the main raw materials; and the carboxymethyl cellulose is 2 to 8 percent of the total weight of the main raw materials. Meanwhile, the invention discloses a method for preparing the surface microporous SiC ceramic material, which comprises the following steps of: uniformly mixing the silicon carbide powder, the yttrium aluminum garnet and the polycarbosilane, and adding aqueous solution of the carboxymethyl cellulose and performing ball-milling mixing; drying the obtained size; and molding the obtained powder and performing vacuum sintering at high temperature so as to prepare the surface microporous SiC ceramic material. The surface microporous SiC ceramic material keeps high strength, high hardness, abrasion resistance, corrosion resistance and oxidation resistance, the self-lubricating property of the material is improved, and a cross section can be prevented from being bonded. Therefore, the service life of the material is prolonged.

The invention discloses a device and method for preparing ethylene glycol through dimethyl oxalate hydrogenation. The device is composed of a gas feeding system, a liquid feeding system, a preheatingfiltration system, a reaction system and a condensation separation system. The gas feeding system comprises a fresh hydrogen compressor, a recycle hydrogen compressor, a flow adjusting valve and a flow transmitter; the liquid feeding system comprises a dimethyl oxalate feeding tank and a metering pump; the preheating filtration system mainly comprises a feeding heat exchanger and a precision filter; the reaction system comprises a tubular reactor and a steam pocket; the condensation separation system comprises a product cooler and a gas-liquid separation tank. Accordingly, full utilization ofheat energy and hydrogen recycling are achieved, the system temperature, pressure, flow and liquid level are all automatically controlled, the tubular reactor is adopted, in the shell side, high pressure hot water coming from the steam pocket passes, reaction heat is absorbed to become high pressure steam, by adjusting the steam pressure, the reaction temperature can be strictly controlled, the reaction heat is effectively removed in time, the product stability is improved, and the service life of a catalyst is prolonged.

The present invention relates to a method for preparing hydrogen sulfide. The method uses molten sulphur and hydrogen as starting materials, including a synthesizing stage of hydrogen sulfide and a refining stage of hydrogen sulfide. The synthesizing stage of hydrogen sulfide includes steps of evaporating and vaporizing the molten sulphur in an evaporator by utilizing an electric induction heating device on the periphery of the evaporator to obtain sulfuric vapors; putting the hydrogen into the evaporator, pre-heating, rising temperature, intensive mixing with the sulfuric vapors to obtain the gas mixture of hydrogen and sulfuric vapors; and putting the gas mixture of hydrogen and sulfuric vapors into a synthesizing tower, and synthesizing to obtain the gas mixture of hydrogen sulfide, hydrogen and sulfuric vapors. The refining stage includes steps of removing the sulfuric vapors from the gas mixture of hydrogen sulfide, hydrogen and sulfuric vapors, absorbing the hydrogen sulfide and regenerating to obtain the refined hydrogen sulfide gas. The molten sulphur is evaporated by utilizing the electric induction evaporator, which is easy to control the temperature and has high evaporation efficiency.

The invention discloses a device and process for preparation of melamine formaldehyde foam, the device comprises melamine reactors, a single screw extruder, a metering feeder, a reaction type twin-screw extruder, a sheet machine head and a microwave foaming device, which are connected in sequence, the number of the melamine reactors is two, and the melamine reactors are arranged in parallel. The device can effectively and timely remove a large amount of heat of reaction when melamine and formaldehyde react, so that the reaction is performed in a smooth and controlled manner, and a melamine formaldehyde foam product with stable quality can be continuously produced.

The invention discloses a packed directional flow electrochemical reactor, which solves the problems of low reaction conversion efficiency, high energy consumption, complex structure, high operation cost, poor adaptability and the like existing in the existing electrochemical reactor. The technical solution includes a cylinder body, the two ends of the cylinder body are short inlet connection pipes and outlet connection short pipes respectively, and at least one reaction unit is arranged in the cylinder body, and the reaction unit is composed of two electrodes with opposite poles and insulated from each other. The chamber is composed of a cathode chamber and an anode chamber respectively, and the inlet connection short pipe of the cylindrical body communicates with the outlet connection short pipe through the two electrode chambers of the reaction unit in turn. The invention has the advantages of simple structure, low investment cost and operation cost, high conversion efficiency, and is suitable for electrolytes with various properties.

The invention discloses a directional flow electrolysis process, which solves the problems of low conversion rate of reactants, high energy consumption, poor adaptability and the like existing in the existing electrolysis process. The technical solution includes sending the electrolyte solution into the electrolysis reactor to carry out the electrolysis reaction. The electrolyte solution first enters one of the electrode chambers in the electrolysis reactor, and after completing the electrochemical oxidation or reduction reaction, flows through the gap between the two electrode chambers and then Enter the next electrode chamber with opposite polarity to carry out electrochemical reduction or oxidation reaction, and the reacted electrolyte flows out of the electrolytic reactor. The invention has the advantages of simple process, low investment cost and operation cost, high conversion efficiency, and is suitable for electrolytes with various properties.

The invention discloses a flue gas pollutant cooperation removal technology based on electrolysis. The problems are solved that technologies are complex, the pollutant treatment efficiency is low, investment and operation cost are high in present flue gas treatment. The technology comprises steps: flue gas is pressurized and sent to a concentration tower, a reaction is carried out, the flue gas going out from the concentration tower is sent to an absorbing tower and contacts and reacts with a circulating absorption solution sprayed from a spray layer at the upper part of the tower in a reverse manner, and the flue gas after reaction is discharged from the top of the absorbing tower; part of the concentrate at the tower bottom of the concentration tower is subjected to iron removal, then is sent to a ammonium sulfate crystallization system, the flue gas goes into the absorbing tower from a flue gas inlet at the middle part of the absorbing tower, goes through at least one absorbing and electrochemical reaction layer arranged at the upper part of the tower firstly, then contacts and reacts with a circulating absorption solution in a reverse manner, then goes through a filler layer and a spraying layer, and is discharged from a flue gas outlet. The technology is simple, the reaction efficiency is high, the operation and investment cost are low, the system land occupation area is small, and the technology is especially suitable for cooperation treatment of multiple pollutants of sulfur dioxide, nitrogen oxides, fine particles, dioxin and the like.

The invention discloses a novel efficient fruit juicing device which structurally comprises a feeding cover hole, a connection protective outer frame, a juicing separation device, a pollution discharge platform, a supporting buffer base, a placement cup groove, a juice outlet pipe orifice, a safety handle grip, an isolation buffer layer, a fruit placement bottle and a safety pressure grip; the front side of the outer surface of the supporting buffer base is welded to the back end of the placement cup groove; the upper end of the supporting buffer base is installed at the lower end of the juicing separation device; and the lower side of the front end of the juicing separation device is mechanically connected to the back end of the juice outlet pipe orifice. The novel efficient fruit juicingdevice has the beneficial effects that by adding the juicing separation device on the equipment, when the equipment performs fruit juicing operation, fruit dregs and residues in a fruit juice can betimely and effectively eliminated, so that the efficiency of the novel efficient fruit juicing device in juicing the fruit juice is improved, the workload of a worker is lightened, the working efficiency of the equipment is greatly improved, and the novel efficient fruit juicing device is more practical.

The invention discloses a smog-free ultrasound knife. The smog-free ultrasound knife comprises a control device, a suction device, a housing and an ultrasonic knife body. The control device comprises a switch, a power unit and a transmission unit, the power unit is connected with the transmission unit, the switch is electrically connected with the power unit and a negative pressure generator, the suction device comprises the negative pressure generator and a suction part, the negative pressure generator is electrically connected with the control device, the suction device coincides with the axis of the knife bar of the ultrasonic knife body, the inner diameter of the pipe of the suction device is larger than the largest diameter of the outer pipe of the ultrasonic knife body, the suction device is communicated with the negative pressure generator in a sealing manner, one end of the suction device is in transmission connection with the transmission unit to form the seal, the other end of the suction device is in transmission connection with the housing to form the seal, and the suction device is arranged in the housing. During the cutting process of the ultrasonic knife body, the suction device can play a role in cleaning the operation visual field, and the safety and fluency of operations can be improved.

The invention discloses a flue gas ammonia synchronous desulfurization and denitrification process based on electrolytic regeneration to remove iron, which solves the problem of low regeneration efficiency of absorption liquid in the existing desulfurization and denitrification process. The technical scheme includes that after the flue gas is pressurized, it is sent to the concentration tower to contact and react with the concentrated liquid in the tower. After iron removal by the first electrolytic reactor, it is sent to the ammonium sulfate crystallization system. The absorbed liquid after partial reaction at the bottom of the absorption tower is regenerated and returned to the upper part of the absorption tower as a circulating absorption liquid. The concentrated liquid first enters the first electrolytic reactor The anode chamber in the reaction unit undergoes an oxidation reaction, and then enters the cathode chamber to undergo a reduction reaction; the reacted electrolyte is discharged from the short outlet pipe of the reactor and sent to the ammonium sulfate crystallization system. The invention has the advantages of simple method, low investment cost and operation cost, high conversion efficiency, good iron removal effect, and good desulfurization and denitrification effect.

The invention discloses a preparation method for hydroxyethyl dual fatty acid amide. The method specifically includes steps: (1) salification reaction: reacting hydroxy higher fatty acid with hydroxyethyl ethylenediamine under the protection of nitrogen, heating a complex antioxidant of sodium bisulfite and sodium borohydride and a complex catalyst of phosphoric acid, magnesium sulfate and calcium sulfate for salification reaction; (2) dehydration reaction: increasing temperature for continuing reaction after adding hydroxyethyl ethylenediamine for reaction; and (3) enabling the temperature of materials to be decreased to 80 DEG C to 100 DEG C, the amine value to be less than or equal to 5 mgKOH / g and the acid value to be less than or equal to 10 mgKOH / g for discharging to obtain the hydroxyethyl dual fatty acid amide. The sodium bisulfite and the sodium borohydride are taken as the complex antioxidant during the reaction process and the process conditions are adopted, so that products are colory and have low melting point.

The invention discloses a surface microporous SiC ceramic material, which consists of main raw materials, polycarbosilane and carboxymethyl cellulose, wherein the main raw materials consist of the following components in percentage by weight: 85 to 90 percent of silicon carbide powder and 10 to 15 percent of yttrium aluminum garnet; the polycarbosilane is 5 to 10 percent of the total weight of the main raw materials; and the carboxymethyl cellulose is 2 to 8 percent of the total weight of the main raw materials. Meanwhile, the invention discloses a method for preparing the surface microporousSiC ceramic material, which comprises the following steps of: uniformly mixing the silicon carbide powder, the yttrium aluminum garnet and the polycarbosilane, and adding aqueous solution of the carboxymethyl cellulose and performing ball-milling mixing; drying the obtained size; and molding the obtained powder and performing vacuum sintering at high temperature so as to prepare the surface microporous SiC ceramic material. The surface microporous SiC ceramic material keeps high strength, high hardness, abrasion resistance, corrosion resistance and oxidation resistance, the self-lubricating property of the material is improved, and a cross section can be prevented from being bonded. Therefore, the service life of the material is prolonged.

The invention discloses an ammonia desulphurization and denitrification process for flue gas by synchronization of complexing absorption and electrolytic regeneration and solves the problem of low absorption liquid regeneration efficiency in an existing synchronous ammonia desulphurization and denitrification process for the flue gas. The technical scheme includes that the flue gas is pressurized and then fed into a concentration tower to realize contact reaction with concentration liquid in the tower, the flue gas discharged from the concentration tower is fed into an absorption tower to realize contact reaction with cyclic absorption liquid in the absorption tower, the concentration liquid at the bottom of the concentration tower is subjected to deferrization through a first electrolytic reactor after reaction and then fed into an ammonium sulfate crystallization system, the absorption liquid at the bottom of the absorption tower is regenerated and then fed back to the upper portion of the absorption tower to serve as the cyclic absorption liquid, the concentration liquid enters an anode chamber of a reaction unit of the first electrolytic reactor to realize oxidation reaction and then enters a cathode chamber to realize a reduction reaction, and an electrolytic solution is discharged through a short outlet connection pipe of the reactor after reaction and fed into the ammonium sulfate crystallization system. The ammonia desulphurization and denitrification process for the flue gas by synchronization of complexing absorption and electrolytic regeneration has the advantages of simplicity, low investment cost and operation cost, high conversion efficiency and effectiveness in deferrization, desulphurization and denitrification.

The invention discloses a novel efficient fruit juicing device which structurally comprises a feeding cover hole, a connection protective outer frame, a juicing separation device, a pollution discharge platform, a supporting buffer base, a placement cup groove, a juice outlet pipe orifice, a safety handle grip, an isolation buffer layer, a fruit placement bottle and a safety pressure grip; the front side of the outer surface of the supporting buffer base is welded to the back end of the placement cup groove; the upper end of the supporting buffer base is installed at the lower end of the juicing separation device; and the lower side of the front end of the juicing separation device is mechanically connected to the back end of the juice outlet pipe orifice. The novel efficient fruit juicingdevice has the beneficial effects that by adding the juicing separation device on the equipment, when the equipment performs fruit juicing operation, fruit dregs and residues in a fruit juice can betimely and effectively eliminated, so that the efficiency of the novel efficient fruit juicing device in juicing the fruit juice is improved, the workload of a worker is lightened, the working efficiency of the equipment is greatly improved, and the novel efficient fruit juicing device is more practical.

The invention relates to the field of Fischer-Tropsch synthesis, and particularly provides a slurry bed reaction system and a method. The slurry bed reaction system comprises a slurry bed reactor, aninternal heat exchange unit and an external heat exchange unit, wherein the external heat exchange unit comprises a steam drum and a heater, the steam drum and the heater are sequentially connected inseries, the heater is communicated to the lower-portion water inlet of the internal heat exchange unit, the steam drum is communicated to the upper-portion water outlet of the internal heat exchangeunit, the internal heat exchange unit comprises heat exchange pipes, and baffles are arranged inside the part of or all of the heat exchange pipes, and are used for prolonging the residence time of aheat exchange medium in the internal heat exchange unit. With system of the present invention, the heat exchange efficiency of the heat exchange unit in the reactor can be improved, the uniform and stable temperature inside the slurry bed reactor can be ensured, and the excess heat caused by the temperature runaway can be effectively removed when the catalyst is subjected to local temperature runaway so as to ensure the yield of the target product and improve the operation safety of the device.