16results about How to "Stable operating conditions" patented technology

The invention discloses a raw material crushing device for food production and processing, and relates to the technical field of food processing.The raw material crushing device comprises a machine body and further comprises a crushing control device and a lifting device.A crushing frame is fixedly installed on the surface of the machine body in a penetrating mode, a feeding opening is fixedly formed in the surface of the crushing frame, and a material receiving frame is fixedly installed at the bottom of the inner wall of the machine body; a crushing motor is fixedly mounted at the top of the crushing frame, the crushing control device comprises a placing frame, a placing plate, a placing rod, a control plate, a control rod, a linkage plate and a sealing plate, the sealing plate moves downwards to shield a feeding port to achieve the effect of controlling feeding, the placing frame penetrates through the top of the crushing frame, and the placing plate is rotatably mounted on the inner wall of the placing frame. The placing rods are fixedly installed on the surface of the placing plate, the speed and quantity of pepper feeding can be accurately controlled by adjusting the opening degree of the shield, and stable operation conditions can be maintained in the production process.

The invention discloses a four-step-in-one negative pressure oil-carrying shutdown method for a styrene dehydrogenation reaction system, and relates to the technical field of styrene dehydrogenation. A negative-pressure steam oil-carrying mode is adopted for the first time, after feeding of the dehydrogenation reaction system is cut off, operation of a tail gas compressor is still maintained, the normal negative-pressure working condition of the reaction system is maintained, and steam oil-carrying under the negative-pressure working condition is carried out; after oil carrying is finished, the tail gas compressor still keeps running, the pressure is gradually increased to micro-positive pressure, and catalyst scorching is conducted; and after scorching is finished, the tail gas compressor is still maintained to operate in the steam cooling and nitrogen cooling processes until nitrogen cooling is finished, the tail gas compressor is stopped, and meanwhile multiple times of starting and stopping of the tail gas compressor are optimized into one-time stopping operation in the stages of steam oil carrying, catalyst scorching, steam cooling and nitrogen circulating cooling. One-time shutdown operation of the tail gas compressor is achieved through negative pressure shutdown, the shutdown operation step sequence of the reaction system is greatly simplified, and the shutdown disposal difficulty of the dehydrogenation reaction system is reduced.

The invention provides an efficient and energy-saving magnetic suspension fan and an operation method, and relates to the field of magnetic suspension fans, the efficient and energy-saving magnetic suspension fan comprises a double-end impeller driving part, a first-stage air inlet pipe orifice, a positioning mounting plate, a first-stage air outlet volute, a second-stage air inlet pipe orifice, a second-stage air outlet volute and a shunt connecting pipeline; the primary air inlet pipe orifice is in bolted connection with the left side of the double-end impeller driving part; the first-stage air outlet volute is in bolted connection with the left side of the double-end impeller driving part; the secondary air inlet pipe orifice is in bolted connection with the right side of the double-end impeller driving part; the second-stage air outlet volute is in bolted connection with the right side of the double-end impeller driving part; the positioning mounting plate is fixedly connected to the inner side of the primary air inlet pipe orifice; the flow dividing connecting pipeline is fixedly connected to the front side of the second-stage air outlet volute. The occurrence probability of fan surge faults caused by filter element blockage is reduced, and the problem that fan surge is triggered after the air inlet density and the effective air inlet amount are easily affected by filter element blockage is solved.

The utility model relates to the field of petroleum chemical technology, concretely relates to a catalyst settlement system stable in operation and good in settlement effect, including clarification mechanism, sludge buffer tank, feed pipeline, sludge tank, backflow pipeline, overflow pipeline, filter press, filtrate tank and sludge discharge pipeline, the clarification mechanism includes a plurality of settlement tanks that are arranged side by side from front to back in proper order and the clarification tank that is arranged at the end of clarification mechanism, the bottom of clarification tank is provided with special ammonium sulfate solution discharge pipeline, is provided with ammonium sulfate solution pump on the ammonium sulfate solution discharge pipeline, the end of ammonium sulfate solution discharge pipeline extends to ammonium sulfate tank area, the outlet end of ammonium sulfate solution pump is equipped with a branch pipeline, this branch pipeline is connected with the feed inlet on the top of filtrate tank through regulating valve, the bottom outlet of filtrate tank is connected with the inlet of clarification mechanism through filtrate pump. The catalyst settlement system is stable in operation, and the downstream device operation cycle is prolonged.

The invention relates to an integrated recovery process of aromatic hydrocarbons in hydrogen peroxide oxidation tail gas, which specifically comprises the following steps: preheating the oxidation tail gas to 95-115 DEG C, introducing the oxidation tail gas into an adiabatic expansion machine for adiabatic expansion, reducing the pressure to 0.1-0.15 MPa, suddenly reducing the temperature to 3-7 DEG C, realizing energy recovery and power generation by using the Joule-Thomson effect, and condensing and separating out most aromatic hydrocarbons; and the condensed tail gas enters the activated carbon adsorption tower for deep adsorption, so that the aromatic hydrocarbon content in the finally discharged tail gas is less than or equal to 70mg / m. Through cooperation of process units, efficient recovery of aromatic hydrocarbons (the total recovery rate is greater than or equal to 95%), self-sufficiency of energy and even negative energy consumption operation (the unit tail gas treatment energy consumption is-5-0 kW.h / 1000 m) are realized, the stability and economical efficiency of an adsorption system are remarkably improved, and the technical problems of high energy consumption, low recovery rate and poor adsorption stability of a traditional cooling and adsorption process are solved.

The invention belongs to the technical field of fuel cells, and particularly relates to a fuel cell flow velocity field on-line test device and method, and the device comprises a separation plate and a flow velocity measurement plate which are arranged in a stacked manner. Flow velocity sensors are assembled on the upper surface of the flow velocity measuring plate in an array mode. A signal channel and a current channel are formed in the flow velocity measuring plate, and the signal channel is formed in the position of the flow velocity sensor; the lower surface of the flow velocity measuring plate is provided with a cooling water flow field. A mounting hole for penetrating through the flow velocity sensor and an air hole are formed in the partition plate; the upper surface of the partition plate is provided with a cathode gas flow field; the device is provided in place of a bipolar plate in a fuel cell. Compared with the prior art, the problems that in the prior art, a test structure is complex, and a test result highly depends on the precision of a calculation model are solved. According to the scheme, on-line measurement of flow velocity field distribution in the fuel cell is achieved, the device can replace a bipolar plate to be assembled at any cell, and testing is flexible.

The present invention discloses a method for identifying equivalent inertia constants of a power system based on data regression, namely, the least square method (LSM), which belongs to the technical field of power systems. The present invention includes identification of equivalent inertia constants of synchronous machines and identification of virtual inertia; the moment of inertia is an inherent property of the synchronous generator SG, which stores kinetic energy through the rotor, and the SG naturally uses this kinetic energy to compensate for power imbalance, as shown in the formula: #imgabs0# where ω SG is the angular frequency of the synchronous motor, p m,SG and p e,SG is the mechanical power and electromagnetic power; p D,SG The active power change is caused by the damping effect. The present invention can achieve good accuracy in identifying the moment of inertia and virtual inertia under different operating conditions through the cooperation of various parts, and can be used to quantify the inertia support effect of time-varying adaptive inertia.

This invention provides a carbon source adaptive dosing control method and system based on a dynamic baseline and a stepped coefficient, belonging to the field of wastewater treatment technology. The method includes: real-time acquisition of total nitrogen concentration and flow rate data of the effluent from the anoxic tank, calculating the total flow rate of the anoxic tank; setting a fixed reference value as a safety baseline and establishing an independent dynamic baseline initially; determining the stepped dosing coefficient by calculating the ratio of the current effluent total nitrogen concentration to the upper limit of discharge, and calculating the carbon source dosing amount when the ratio is zero; finally, by calculating the relative change amplitude with the dynamic baseline, triggering dosing adjustment only when there is a significant change in water quality, avoiding frequent system adjustments due to measurement noise or small fluctuations in water quality. This invention combines an absolute safety baseline with a relative change threshold, eliminating the need for complex models and frequent calibration, and offering fast response, strong disturbance resistance, and low cost.

The valve comprises a valve seat, the valve seat is provided with a first outer side wall and a second outer side wall which are oppositely arranged in parallel, the valve comprises a base, the base is provided with a groove body, the groove body is internally provided with a first inner side wall and a second inner side wall which are oppositely arranged, and the end, opposite to the groove body, of the base partially extends outwards to form a protruding part; when the valve seat is located in the groove body, the first abutting part can be fixed between the first inner side wall and the first outer side wall to form limiting; when the valve seat is located in the groove body, the second abutting portion can be fixed between the second inner side wall and the second outer side wall to form limiting. The limiting device can adapt to different mounting and dismounting conditions, and the limiting effect is ensured.

The invention provides a method and system for separating and purifying bisphenol A through continuous melt crystallization, and belongs to the technical field of separation and purification. The method comprises the following steps: 1, carrying out suspension crystallization on a pre-concentrated solution containing bisphenol A and phenol to obtain bisphenol A-phenol adduct crystal mush; step 2, pre-separating the bisphenol A-phenol adduct crystal mush to obtain a suspension crystallization mother solution and a first thick solid phase, and carrying out rotary melting crystallization on the first thick solid phase to obtain a rotary melting crystallization mother solution and a second thick solid phase; and step 3, performing sweating purification on the second thick solid phase to obtain high-purity bisphenol A. Compared with a traditional separation and purification scheme, the method is simple in technological process, low in energy consumption, high in product purity and capable of continuously and stably running for a long time.

The invention discloses rotary core welding equipment for capacitor production and processing, and relates to the technical field of rotary core welding engineering.The rotary core welding equipment for capacitor production and processing comprises a fixed frame and an electric appliance chip, and an electric push rod is fixedly installed above the frame; a sleeving cylinder I is fixedly mounted on the circumferential surface of the output end of the electric push rod; the clamping and positioning device comprises a first L-shaped plate, a first inclined block, a supporting plate, a supporting rod, a clamping plate, a square plate, a first connecting block, a first connecting rod, a first concave plate, a first U-shaped plate, a first protruding block, a second inclined block, a first pushing block, a second connecting block, a semi-fluted disc and a first telescopic elastic rod. Welding efficiency is improved, manual intervention is reduced, welding quality is ensured, and labor cost and production cost are saved.

This utility model belongs to the field of chemical equipment technology, specifically relating to a post-propane dehydrogenation tower process unit for the co-production of MTBE from isobutane. It includes a mixed C4 feed buffer tank and a methanol buffer tank, both with their outlets connected to the inlet of the etherification reactor. The outlet of the etherification reactor is connected to the feed inlet of the catalytic distillation tower via the discharge buffer tank. The bottom discharge of the catalytic distillation tower is connected to the MTBE tank area, and the top discharge is connected to the top reflux tank. The liquid phase in the reflux tank is split into two paths: one returns to the top of the catalytic distillation tower, and the other feeds to the C4 residue washing tower. The bottom discharge of the washing tower is connected to the methanol recovery tower, and the top discharge is connected to the feed inlet of the propane dehydrogenation tower via a residue collection tank. The bottom discharge of the propane dehydrogenation tower is split into two paths: one is recycled back to the bottom of the tower, and the other is pumped downstream; the top discharge is connected to the reflux tank, with its liquid phase split into two paths: one returns to the top of the propane dehydrogenation tower, and the other feeds to the C3 component tank area. This post-propane dehydrogenation tower design can reduce equipment size, investment, and energy consumption.

Concentrated solution crystallizing equipment capable of continuously working comprises a box body, a liquid inlet, a liquid outlet, a liquid inlet, a liquid outlet and a liquid outlet, the bottom of the box body is an inclined surface bottom plate; a material shifting device is arranged above the inclined plane bottom plate; the material stirring device is arranged above the inclined surface bottom plate, and crystals separated out of the concentrated solution in the box body are stirred from the bottom to the top and then are discharged from the discharge hole; the box body is provided with a liquid level keeping mechanism, the set liquid level enables the bottom end part of the inclined plane bottom plate to be immersed in the concentrated solution, and the rear end part of the inclined plane bottom plate is exposed out of the liquid level; a temperature adjusting device is also arranged inside or outside the box body and is used for heating or cooling the concentrated solution in the box body so as to crystallize the concentrated solution. The equipment disclosed by the invention is high in operation automation degree and free from blockage risk.

The condensate conveying system for the ORC condensate generator sets is capable of avoiding the flash evaporation phenomenon in equipment and pipelines and comprises a flash evaporation tank, a plurality of ORC condensate generator sets, a bypass cooler and a high-pressure desalted water heat exchanger which are communicated through pipelines, and gate valves, flow meters and thermometers are installed in different areas of the communicated pipelines. A liquid level adjusting valve is arranged at an outlet of the flash tank, a manual valve is arranged on a feeding pipe of the ORC condensate generator set, a first adjusting valve set in linkage with a flow meter at the feeding end is arranged at the discharging end of the ORC condensate generator set, and the manual valve at the feeding end of the ORC condensate generator set in the working state is in a full-open state. The total amount of steam condensate in the ORC condensate generator set is kept constant through the first adjusting valve set at the outlet end. And the flash evaporation phenomenon of high-temperature condensate in the pipeline and equipment caused by the pressure change after the valve is adjusted in the existing pipeline can be effectively avoided, and the conditions of pipeline vibration, abnormal display of flow and temperature monitoring instruments and the like caused subsequently can be effectively avoided.

The utility model discloses a manufacturing die for a silicon carbide push plate for a kiln, which comprises an operation case, a material crushing box is arranged above the operation case, a first material crushing roller, a second material crushing roller, a third material crushing roller and a fourth material crushing roller are respectively arranged in the material crushing box, the front end of the material crushing box is fixedly connected with a discharging barrel through a hoop assembly, and the front end of the discharging barrel is fixedly connected with a die. The rear end of the discharging barrel is communicated with the discharging end of the material crushing box through a notch, a feeding hopper is installed at the upper end of the discharging barrel, a screening mechanism is installed in the feeding hopper, a mold machine box is arranged below the discharging barrel, a mold cavity is formed in the mold machine box, and a material vibrating mechanism is installed at the lower end of the mold machine box. According to the utility model, raw materials for producing the silicon carbide push plate are fully crushed and mixed and then are injected into the mold box to be vibrated, so that the raw materials and a binding agent material are more fully and uniformly mixed, and the high-quality and durable silicon carbide push plate can be produced through the steps of the method, so that a stable support is provided for a kiln.

The utility model provides a disc type aluminum-to-nickel tab which comprises a fixing frame, a supporting frame is fixedly installed at the upper end of the bottom of the fixing frame, a rotating disc is rotationally connected to one side of the supporting frame, and a material passing block is fixedly installed on the front face of the supporting frame. According to the disc-type aluminum-to-nickel tab, by arranging a first screw hole, a sliding groove, a moving block, a second screw hole, a pressing block, a rotation stopping piece, a rotating shaft, a material passing plate and other structures, the first screw hole of a side plate and the second screw hole of a moving block connecting plate are connected through a plug pin or a bolt, the moving block is effectively stabilized, the stability of tab limiting is guaranteed, a motor drives a screw to be matched with the sliding groove, and the moving block moves accurately; the pressing block and the non-slip mat achieve reliable limiting of the tabs, an operator can further finely adjust the motor to accurately position the pressing block, the rotation stopping piece can control the rotating disc to be started and stopped according to needs, conveying deviation of the tabs is prevented, the rotating shaft of the material passing block reduces conveying friction of the tabs, the arc-shaped rear end of the material passing plate guides the tabs to stably enter the machining position, and bending deviation is avoided.