118results about How to "Stable operating conditions" patented technology

The invention relates to a PTA incineration boiler ash residue solution salt separation crystallization process, and belongs to the technical field of evaporative crystallization. The process comprises the following steps of: dissolving ash of the PTA incineration boiler with waste heat into a nearly saturated solution of sodium carbonate and sodium bromide, and removing metals and other insoluble substances from the solution by adopting a metal sintering filter, separating the obtained filtrate by adopting an evaporative crystallization method to obtain sodium carbonate monohydrate crystals, removing sodium carbonate from the mother liquor by adopting a replacement method, and then separating by adopting an evaporative crystallization method to obtain sodium bromide crystals. Sodium carbonate and sodium bromide in the PTA boiler ash are separated and recovered by adopting an evaporative crystallization method, the process flow is simple, the operation conditions are simple, convenient and stable, and industrialization is facilitated; the high-purity sodium carbonate and sodium bromide recovered by the method can meet the quality requirements of industrial-grade products and can be directly recovered and reused or sold as by-products, so that the purpose of treating waste residues and wastewater is achieved, the requirements of the current environmental protection situation are met, waste can be turned into wealth, recycling of salt is realized, and the benefits of factories are improved.

The invention discloses a tunnel type multi-stage heat pump series drying and dehumidifying system. The tunnel type multi-stage heat pump series drying and dehumidifying system comprises a multi-stage heating chamber, a multi-stage dehumidification chamber, a tunnel type drying chamber, a return opening and a mixing chamber. An inlet of the multi-stage heating chamber is provided with a main air blower and the multi-stage heating chamber is connected with the mixing chamber. An outlet of the multi-stage heating chamber is connected with an inlet of the tunnel type drying chamber. An outlet of the tunnel type drying chamber is connected with an inlet of the multi-stage dehumidification chamber through the return opening. An outlet of the multi-stage dehumidification chamber is connected with the mixing chamber. The closed multi-stage heat pump drying and dehumidification system of the invention is not affected by the external environment. Compared with a single-stage heat pump drying system, multi-stage dehumidification effectively removes the moisture in the dry air and reduces the temperature difference of the single-stage air, and multi-stage heating effectively improves the air supply temperature and reduces the temperature difference of single-stage air. The pressure ratio of a compressor is reduced. The efficiency of the compressor and the dehumidification efficiency are improved effectively.

The invention discloses a method for preparing electronic-grade tetramethylammonium hydroxide on an industrial scale. In the method, tetramethylammonium bicarbonate is used as a raw material, and two chambers plus an ion membrane are used for electrolytic preparation. The electrolytic cell is a combined electrolytic cell composed of multiple unit cells composed of two chambers and ion membranes in parallel. The electrolytic solution in the electrolytic cell is forced to circulate with a magnetic pump. , tank liquid collection pipe, gas-liquid separator, circulation tank, pump and cooler. In order to prevent the accumulation of impurity ions in the system, a bypass is set in the anode circulation pipeline, so that part of the anolyte passes through the anion and cation exchange resin beds in the bypass to remove impurity ions. The gas generated by the cathode and anode passes through the liquid-sealed tank and then is emptied or recycled for utilization. The invention has a short technological process, can carry out industrialized continuous production, has stable operating conditions in the production process, high current efficiency, and all incoming raw materials become products without discharging electrolytic residual liquid.

The invention discloses a floating type small pumping station. The floating type small pumping station overcomes the defects of existing pumping stations that construction period is long, manufacturing cost is high, structure is complicated, operation condition is unstable and maintenance is inconvenient. The pumping station is composed of a pile shaft, a pontoon, a pump chamber and a traffic bridge, wherein the pile shaft is vertically fixed to a water area suitable for water sampling, the pump chamber is connected with the pontoon, and the pontoon is provided with an inner cylinder serving as a guiding hole; the inner cylinder is in sliding fit with the pile shaft, and the pontoon can move up and down along the pile shaft along with the water level change of the water area; a water pump is fixed in the pump chamber and provided with a water inlet component and a water outlet component in a matched mode, a suction port of the water pump extends to water at the bottom of the pump chamber through the water inlet component, and an output port of the water pump is connected with a water delivery pipeline on the shore through the water outlet component; the traffic bridge is of a beam and slab structure, one end of the traffic bridge is hinged to a shoreside concrete base, the other end of the traffic bridge is connected with an idler wheel through a bearing, the idler wheel can roll along the upper surface of the pontoon, and traffic between the pump chamber and the shoreside can be maintained for any water level.

The embodiment of the invention provides a device and method for automatic calibration of an engine MAF sensor, and belongs to the field of MAF sensors. The method comprises the following steps: calculating the air inflow deviation between the control air flow measured by an engine air inflow temperature and pressure TMAP sensor and the fresh air inflow measured by the MAF sensor; when the deviation is within the range of the correction level and/or the fault error reporting level, reporting the error; carrying out the correction and/or fault reporting. Compared with the prior art, the methodcan judge whether the MAF sensor has the measurement error or not more accurately and timely; the error is actively corrected and/or reported, and the problem that due to the fact that the measurementerror of the MAF sensor exists, engine emission exceeds the standard or the smoke intensity is deteriorated is solved.

The invention discloses a production device of a catalyst for cyclohexene preparation through benzene selective hydrogenation and a method utilizing the device to prepare the catalyst. The production device comprises a high-pressure reaction system, a vacuum system, a control system and a tank system, can achieve multiple purposes through one kettle and one tank and is simple and convenient to operate. The preparation method comprises the operating steps of burdening, precipitation reaction, ageing, reduction and washing, and a prepared catalyst is stable in activity and suitable for industrial production and application.

The invention discloses a multifunctional intelligent scattered natural gas recovery device and a method thereof. The device comprises a detection system, a recovery system, a power system and a temperature control system. All equipment of the device is arranged on a recovery vehicle in a skid-mounted manner. When pipe network diffused gas, scattered field gas and oil field diffused gas are recovered, universal connectors on the recovery vehicle are in butt joint with reserved valves on original diffusion pipelines for recovery of natural gas. According to the recovery process, automatic switchover of recovery procedures under different gas matter composition conditions is achieved through detection and automatic control systems. According to the device and the process method, natural gas in multiple scattered gas sources can be effectively recovered, the influences of the greenhouse effect generated by diffused gas of the natural gas are fully reduced, energy is effectively saved, and good economic benefits are achieved. The process procedures are safe, simple, high in automatic control degree and simple in operation; and the device is started and stopped immediately, natural gas recovery points in different places can be flexibly moved, and wide application prospects and development potential are achieved.

The invention relates to a method for preparing quicklime by continuously calcining limestone in a shaft kiln, belonging to a method for preparing quicklime by calcining limestone in a shaft kiln. The method is provided with a computer centralized control system, and implements the following steps according to a preset program: (1) while automatically controlling gas flow and pressure of kiln bottom combustion-supporting blast air and kiln top exhaust induced air, continuously calcining; (2) automatically discharging qualified calcining product quicklime in a periodical and discontinuous way; and (3) evenly mixing the raw material limestone and fuel coal according to a preset ratio, and automatically supplementing synchronous with the discharged product in a periodical and discontinuous way. The method provided by the invention has the advantages of high raw material coal heat efficiency, low consumption, stable operating conditions and low production cost. The heat efficiency of the fuel coal is greater than or equal to 80%. The heat utilization ratio is enhanced by more than 20% as compared with the prior art. The quality indexes the product quicklime are as follows: CaO>=94%, MgO<=3%, SiO2<=2%, and discretionary reduction<=10%. The consumption of the raw material coal is lowered, i.e. every ton of product quicklime consumes 115-120kg of fuel coal.

The invention discloses a multi-stage combined vibration isolation and vibration damping device of an automatic molding machine of a building block. The device selects a hard rubber fiber material with a special material structure characteristic to prepare a special vibration isolation and vibration damping functional part composed of three different structures including a high-pressure air spring, a vibration damping block and a shaft coupler; and according to different working functions and structure characteristics of continuous transmission of vibration working parts including a compaction molding mechanism, a box type vibration platform, a shaft piece and the like, different combination and different connection mounting technology measures are respectively adopted to form a primary-stage basic vibration isolation and vibration damping device on different vibration working positions, so as to form the multi-stage combined vibration isolation and vibration damping device of the automatic molding machine of the building block. The device has the characteristics of simple structure, convenience for installation and maintenance and the like, and can effectively reduce and absorb damage impact caused by transmitting vibration energy to a basic part of the molding machine in a vibration work process. The device is mainly arranged in the automatic molding machine of the building block and is used for manufacturing a concrete building block product.

The invention discloses a flotation separation method for multi-component waste plastic. The method comprises the following steps: firstly, pretreating multi-component plastic by combining microwave irradiation with a Fenton reagent, and performing separating by using a multi-stage flotation technique to obtain multiple kinds of single-component plastic. The Fenton reagent is a mixed solution of hydrogen peroxide and ferrous ions, and the multi-component plastic comprises polycarbonate, an acrylonitrile-butadiene-styrene copolymer, polypropylene and polyvinyl chloride. According to the method,microwaves are combined with the Fenton reagent to pretreat the multi-component plastic, so that hydrophilicity and hydrophobicity of the surfaces of the multi-component plastic are different, the floatability is different, then step-by-step flotation separation is conducted, the single-component plastic is obtained, continuous and efficient separation of the multi-component plastic is achieved,the application range is wide, the application value is high, and industrial application is easily achieved.

The invention discloses a temperature control device for yielding water of a single-heat type heat pump water heater. A pipeline is connected with a heat storage water tank, a tee-joint proportioning valve, a heating water heat exchanger, a water pump and a yielding water constant temperature control module connected with the heat storage water tank, wherein the yielding water constant temperature control module is connected with an ambient temperature probe, and controls the switching on and off of the tee-joint proportioning valve; and an opening in the A-B direction of the tee-joint proportioning valve is communicated with a water inlet end, and an opening in the B-C direction is communicated with the heating water heat exchanger. In addition, the invention also discloses a temperature control method, the temperature of the heat storage water tank, the ambient and the heating water heat exchanger are subjected to sampling detection, and according to different ambient temperatures, different yielding water temperature values can be set, the switching on-off degree of the tee-joint proportioning valve is adjusted, the water feeding amount is adjusted by the temperature control regulating valve, so that the yielding water temperature of the heating water heat exchanger can reach the set value. The temperature control device can run with safety, stability and high efficiency, and meanwhile, the engineering installation is simple, the cost is low, and the supplied hot water is constant.

The invention relates to the technical field of paint product, in particular to diatom mud paint with visible light catalytic capability. The diatom mud paint is characterized in that nano g-C3N4 withthe visible light catalytic capability is taken as a photocatalyst which is added to a porous structure of the diatom mud paint, indoor visible light is used directly to degrade organic toxic substances adsorbed by diatom mud so that the diatom mud has better purification performance and durability, and toxic substance pollution such as indoor formaldehyde and toluene is reduced.

The invention provides a method for controlling rotation speed of fans of wireless base station equipment. A single plate sensor temperature threshold value and fan rotation speed form and delay down-regulation frequencies of each single plate are set in advance. Each single plate sensor temperature threshold value and fan rotation speed form comprises corresponding relations among a plurality of different temperature up-regulation threshold values, a plurality of different temperature down-regulation threshold values and the fan rotation speed. By means of combining steps of setting the temperature down-regulation threshold values and delay frequencies during down-regulation of the rotation speed and the like, required rotation speed of the fans for heat dissipation of each single plate is decided, the largest rotation speed required by a system is found out and transmitted to the fans, and accordingly, real-time control to the rotation speed of the fans is realized. A process for adjusting the rotation speed of the fans is gentle and smooth, relative stability of running work conditions of the fans is guaranteed, noises generated due to frequent adjustment of the rotation speed are eliminated, and simultaneously, the service life of the fans is further prolonged.

The invention belongs to the technical field of inorganic chemical industry, and relates to a method for avoiding forming hydrogen sulfide hydrate in a methane-process carbon bisulfide production process, which comprises the following steps: a sulfur-natural gas reaction mixture is subjected to primary condensation and desulfurizing tower desulfurization; the primary condensation product and desulfurizing tower bottom distillate together enter a flash tank; the flash-off carbon bisulfide gas is condensed and separated from water; the carbon bisulfide subjected to water separation is pumped back into the desulfurizing tower; and the desulfurizing tower overhead product enters a hydrogen sulfide rectification tower to implement separation of carbon bisulfide and hydrogen sulfide. The method solves the problem that water often exists in the hydrogen sulfide rectification tower and hydrogen sulfide outlet pipeline and forms the hydrogen sulfide hydrate, and provides insurance for safe operation of the carbon bisulfide device. The method is also suitable for solving the problem of some compounds which can easily form hydrocarbon hydrates with water.

The invention provides a method for continuous cycle fermentation production of citric acid. The method comprises slurry mixing, injection liquefaction, continuous elimination and continuous fermentation. The method adopts high-efficiency combined pipe conveying equipment. The high-efficiency combined pipe conveying equipment comprises stepped fermentation tanks and realizes single-line continuous production, wherein each one of production lines comprises the 8-10 fermentation tanks. In a fermentation period, a back flow and a flow amount are controlled according to residual sugar consumption of fermentation liquor flowing out of the tail fermentation tank and acid production situation so that the final residual reducing sugar content is less than 0.1% and an acid yield is close to or more than an amount of post-inoculation total sugar and thus the fermentation is in a continuous fermentation state. The method overcomes the defects of the existing batch single-tank fermentation, effectively realizes mechanization and automation, reduces labor intensity, improves an equipment utilization rate and a fermentation conversion rate, does not produce environmental pollution in fermentation, and is suitable for industrial fermentation production of citric acid.

The invention discloses a modular air conditioning system and an energy regulation control method thereof. The modular air conditioning system comprises one or more air cooling modules, one or more compressors, a water main and a host module, and further comprises a temperature detection unit, wherein each air cooling module is provided with one or more refrigerating systems; each refrigerating system is provided with the one or more compressors; the water main is connected with water pipes of the air cooling modules; the temperature detection unit is used for detecting the water temperature To of the water main; and the host module obtains the current energy demand ratio of the air conditioning system according to the water temperature To of the water main and a set target water temperature Ts, determines the quantity of the compressors needing to operate according to the current energy demand ratio, and performs compressor operating state control accordingly. According to the air conditioning system provided by the invention, energy output is determined according to the current energy demand ratio, results are more accurate, energy output is well matched with the demand, and energy wasting is avoided; and meanwhile, the stable operating condition can be better maintained, and air conditioner comfort degree declining caused by water temperature fluctuations is avoided.

The invention discloses a waste denitration catalyst regeneration zero-discharge wastewater treatment system. A treatment method comprises the following steps: collecting the production wastewater and together feeding into a regulation tank for regulating the water quantity and water quality; lifting the wastewater regulated in the regulation tank into a first-level coagulative precipitation tank by a pump, and adding lime milk, PAM, PAC and a heavy metal capture agent; adding Fe<3+> into the wastewater, then adding alkali to regulate the pH value to 8.5-9.0, and performing blast oxidation for 20-30min; adding a reducing agent into the wastewater; after 10-20min of reaction, adding lime milk; introducing the wastewater into a second-level coagulative precipitation tank, wherein the wastewater is further precipitated through coagulation; enabling the wastewater treated by the second-level coagulative precipitation tank to flow into a middle water tank, and lifting into a filter tank by a pump for filtration; and then, enabling the wastewater to flow into a clean water tank and reusing to a production line. The system disclosed by the invention realizes a good wastewater treatment effect, the wastewater is treated before recycling, and thus a zero-discharge wastewater system is realized.

The invention discloses a pressure adjusting system for an ultralow-temperature refrigerator, which is characterized in that the system is composed of a balance tank (3), a pressure controller (6), solenoids (1, 5), and throttling elements (2, 4), wherein the balance tank (3) is connected with the high-pressure end and the low-pressure end of a compressor through the solenoids (1, 5) and the throttling elements (2, 4); and the pressure controller (6) is arranged on the high-pressure portion of a refrigerating system. The pressure adjusting system for an ultralow-temperature refrigerator formed according to the above scheme can reduce the ratio of low-boiling-point work medium participating in the circulation on the initial operation stage of the refrigerating system, and gradually increase the circulation amount of the low-boiling point work medium along the decrease of the system temperature, thus achieving continuous temperature decrease. On one hand, the system can prevent the occurrence of compressor fault due to overhigh pressure and, on the other hand, can keep the compressor in a stable operation condition, thus achieving uniform temperature decrease speed and stable operation.

The invention belongs to the technical field of spacecraft control system stable operation, and relates to a spacecraft control system data validity identification method. According to the spacecraftcontrol system data validity identification design method provided by the invention, wrong data can be effectively identified and eliminated; the method comprises the steps of carrying out validity identification on sensor measurement data, carrying out validity identification on execution mechanism measurement data, carrying out validity identification on ground injection orbit data, carrying outvalidity identification on external system timing data, avoiding introducing error information into control calculation, ensuring the on-orbit stable operation capability of a spacecraft, and ensuring a closed-loop performance index. Stable and reliable operation conditions are provided for effective loads; the data validity judgment design method provided by the invention aims to eliminate unexpected data and ensure the stable operation of the control system in real time, and is an important protection mechanism which must be provided when the system has fault diagnosis and fault tolerance capabilities; the method is targeted to different data characteristics of various components of the control system, the multi-source information fusion capability is reflected, the designed data validity identification method is good in abstraction degree and high in universality, and misjudgment and missed judgment can be avoided.