43results about How to "Long-term continuous and stable operation" patented technology

The invention provides a VOC (Volatile Organic Compounds) enrichment device. The device comprises a circulating fluidized bed device and a desorption device, wherein the circulating fluidized bed device is provided with a low-concentration VOC mixed gas inlet, an adsorbent inlet, a purified gas outlet and a solid-phase material outlet; the desorption device is provided with an inlet to be desorbed, a fluidized gas inlet and an enriched gas outlet; the inlet to be desorbed is communicated with the solid-phase material outlet. In the VOC enrichment device, the circulating fluidized bed device is taken as an adsorption device so that system running energy consumption can be lowered remarkably, and the cost can be lowered. Meanwhile, more sufficient contact between low-concentration VOC mixed gas and an adsorbent can be realized, and the adsorption rate and efficiency of the VOC adsorbent are increased. Moreover, the circulating fluidized bed device is taken as the adsorption device, circular use of the adsorbent can be realized, so that long-term, continuous and stable running of a treating procedure is realized, and industrial production demands can be met.

The invention relates to a method and equipment for nylon 66 short-flow continuous polymerization. The method comprises the steps of carrying out heating, evaporation, concentration and polycondensation of 30-70% of a nylon 66 salt solution in a normal pressure pre-polypolycondensation tower by adopting a reaction distillation method to obtain a prepolymer with a polymerization degree of 5-50 (preferably 20-40) and equimolar terminal carboxy group and terminal amine group, and allowing the prepolyer to directly produce a polymer with a polymerization degree meeting technical indicators without flash distillation. A falling film devolatilization method is adopted in the polycondensation kettle to accelerate distillation out of condensation water, reduce reaction temperature, shorten reaction time and reduce gel; and the falling liquid film is used to seal and cover the kettle wall to avoid scarring of the kettle wall. Compared with the traditional nylon 66 continuous polymerization device, the method and the equipment provided by the invention has the advantages of short process, large single line scale, less investment, low operating cost, good product quality, long continuous operation cycle, and environmental friendliness.

The invention provides a VOCs adsorption treatment device which comprises a bubbling fluidized bed, a gas-solid separation device and a desorption device. A low-concentration VOCs mixed gas inlet, an adsorbent inlet and a mixture outlet are arranged on the bubbling fluidized bed, the gas-solid separation device is provided with a mixture inlet, a purified gas outlet and a solid-phase material outlet, and the mixture inlet is communicated with the mixture outlet; a to-be-desorbed material inlet, a fluidized gas inlet and an enrichment gas outlet are arranged on the desorption device, and the to-be-desorbed material inlet is communicated with the solid-phase material outlet. The bubbling fluidized bed is utilized as an adsorption device, so that running gas speed is low, bed layer resistance is low, and running energy consumption of a system can be lowered remarkably. In addition, mixing and wearing of a VOCs adsorbent can be enhanced, more sufficient contact between low-concentration VOCs mixed gas and the adsorbent can be realized, adsorption capacity of the adsorbent is improved, and adsorption efficiency of the VOCs adsorbent is further improved. Moreover, the VOCs adsorption treatment device can continuous and stably run for a long time and can meet industrial production needs.

In a seawater treatment method which comprises subjecting seawater to coagulation with a coagulant and solid-liquid separation and then conducting RO treatment of the resulting seawater, the present invention makes it possible to provide high-quality feed water for the RO treatment, even when the amount of the coagulant added is reduced. The use of this high-quality feed water enables the RO treatment to be stably conducted over a long period. This seawater treatment method is a method for pre-treating seawater prior to membrane separation, said method being characterized by adding a cationic organic flocculant and / or an inorganic coagulant to seawater to conduct reaction, thereafter adding an alkaline solution of a high-molecular compound which has a phenolic hydroxyl group and which is insolubilized under a high salt concentration to the resulting seawater to conduct agglomeration, and then subjecting the thus treated seawater to solid-liquid separation. The treated seawater obtained by the method is thereafter desalinated by membrane separation.

The invention relates to an anti-scaling electrodialysis system based on pH control. The anti-scaling electrodialysis system comprises an electrodialysis reactor, a fresh water tank, a concentrated water tank, a pH control system and an acid absorption system, wherein the electrodialysis reactor is formed by assembling an anode plate, a membrane stack and a cathode plate in sequence; the membranestack is composed of cation selective exchange membranes and anion selective exchange membranes which are arranged at intervals to form fresh water channels and concentrated water channels which are arranged at intervals, and polar water channels are arranged on the two sides close to the polar plates respectively; the pH control system is mainly composed of an acid storage tank, an acid adding pump, a pipeline mixer and an online pH meter, a polar water outlet of the polar water tank is connected to an inlet of the pipeline mixer, and the online pH meter is installed at the inlet end of the pipeline mixer. The anti-scaling electrodialysis system based on pH control has the beneficial effects that polar plate scaling in the system operation process can be avoided, scaling-free operation ofthe electrodialysis system is achieved, the operation working condition is optimized, and the water treatment efficiency is improved.

The invention discloses a processing method for electro-adsorption demineralized water, which belongs to the water processing with an electrochemical separation method. The processing method for the electro-adsorption demineralized water comprises the following technical processes of energizing working, discharging for standing, carrying out short circuit and regenerating, and has the characteristics that industrial hydrochloric acid is injected into an electro-adsorption module (1) under the condition of continuously feeding water and energizing before the technical process of discharging for standing; water injected with the hydrochloric acid is controlled to just fill in the electro-adsorption module without being discharged out of the system; in addition, the pH (Potential Of Hydrogen) value range of the electro-adsorption module is controlled to 2.0-6.0; while the hydrochloric acid is injected, yielding water normally enters a water production tank (6) and is switched to a middle water discharging tank B (12); and after the electro-adsorption module is full of the hydrochloric acid, water is stop to feed, and the power supply is cut off to enter the technical processes of discharging for standing and regenerating. The invention provides the processing method for the electro-adsorption demineralized water, which has the advantages of simple step and excellent electrode regeneration effect, the electro-adsorption module does not scale, and an electro-adsorption demineralizer is guaranteed to continuously and stably operate for a long term.

The invention discloses a frequency-changing water supply method for a hot continuous line rolling and ultra-fast cooling system, and belongs to the field of hot continuous rolling and ultra-fast cooling. The frequency-changing water supply method comprises the steps that at an accelerating point of a water pump, the frequency of the water pump is calculated according to the ultra-fast cooling setpressure and water quantity; when the strip steel head does not need special cooling control, a pump station is directly accelerated to the calculated frequency, and then when the strip steel head reaches a pyrometer of a finishing rolling outlet, the water supply pressure of the water pump is dynamically adjusted to reach the ultra-fast cooling pressure set value; when the strip steel head needsspecial cooling control, two times of accelerating are required; then when the strip steel head reaches the pyrometer of the finishing rolling outlet, the water supply pressure of the water pump is dynamically adjusted to reach the ultra-fast cooling pressure set value; and when the strip steel tail leaves an ultra-fast cooling area, the pump station is decelerated to the base frequency state. According to the frequency-changing water supply method, the problem of high-pressure and large-flow stable water supply is solved, especially when special cooling control is conducted on the strip steel head, ultra-fast cooling of the water pressure can be quickly and stably conducted, energy consumption is lowered, pipeline impact is reduced, pipeline vibration is lowered, and thus equipment is protected.

The invention discloses a harmless treatment and resource utilization method for metal-containing pollutants. The method includes the following steps that the metal-containing pollutants are fed into a pretreatment unit, pretreating is conducted, the metal-containing pollutants are fed into a thermal desorption unit through a feeding unit, pyrolyzing is conducted in the thermal desorption unit, and pyrolyzed high-temperature oil gas is fed into a condensation separation unit; solid slag obtained after pyrolysis enters into a melt separation unit, a melt separation furnace is adopted in the melt separation unit to continue to heat the solid slag to 1200-1800 DEG C, produced metal elementary substances are melted into liquid and float on an upper layer, the liquid metal elementary substances are discharged out of the melt separation furnace through a molten metal outlet, and metal is obtained after cooling; and the solid slag at a lower part is discharged out of the melt separation furnace through a slag outlet, and is used as a building raw material after being cooled and crushed. According to the harmless treatment and resource utilization method for the metal-containing pollutants, two-step pyrolysis, melt separation and the like are combined, so that the metal-containing pollutants with different characteristics can be fully treated, high-added-value products such as metal resources and oil resources can be obtained, and harmless treatment and resource comprehensive utilization are achieved.

The invention relates to an additive used in the preparation process of methionine and a preparation method of methionine. The additive provided by the present invention is the mixture that comprises A, B and C component, and A component has the structural formula represented by following general formula (1); B component has the structural formula represented by following general formula (2): C component is Silicone oil; RCON(CH 3 )CH 2 CH 2 SO 3 Na(1) The preparation method of methionine provided by the present invention comprises crystallization and / or recrystallization of methionine in the presence of the additive provided by the present invention. The additive provided by the invention has uniform emulsification, good stability, can be used stably for a long time, and is suitable for continuous crystallization process. The prepared methionine has good crystal form, high bulk density and good fluidity. In addition, according to the preparation method of methionine of the present invention, the crystallization system can run continuously and stably for a long time without obvious foaming phenomenon, and the crystallization process of the methionine product proceeds smoothly.

The invention relates to a frequency conversion water supply method for an ultra-fast cooling system of a hot continuous rolling line, which belongs to the field of ultra-fast cooling of hot continuous rolling. The method includes: at the speed-up point of the water pump, calculate the pump frequency according to the ultra-fast cooling set pressure and water volume; The high temperature gauge at the exit of the finish rolling is used to dynamically adjust the water supply pressure of the water pump to make it reach the set value of ultra-fast cold pressure; when the strip head needs special cooling control, it needs to increase the speed twice; then when the strip head When the pyrometer at the exit of finishing rolling is reached, the water supply pressure of the water pump is dynamically adjusted to make it reach the ultra-fast cooling pressure setting value; when the tail of the strip leaves the ultra-fast cooling area, the pump station decelerates to the basic frequency state. This method solves the problem of stable water supply with high pressure and large flow rate, especially for the special cooling control of the strip head, which can achieve fast and stable ultra-fast cold water pressure, reduce energy consumption, reduce pipeline impact, reduce pipeline vibration, and protect equipment effect.

The invention discloses an air flotation separation device, comprising an external cylinder (2), a rotational flow mixed cylinder (8), a first slag-retaining cylinder (7), a first scum drainage pipe (4) and a scum collecting guide plate (10); wherein, the bottom end of the first slag-retaining cylinder (7) and the bottom of the external cylinder (2) have spacing so as to form a water passage; thebottom of the side wall of the rotational flow mixed cylinder (8) is connected with a water inlet pipe (16) which enters in tangent direction; the periphery of the top of the external cylinder (2) isprovided with a clean water collecting trench (14); and the scum collecting guide plate (10) is a strip-typed plate in an involute shape, with the involute direction right opposite to the water rotational flow direction in the rotational flow mixed area (A). Compared with the prior art, the air flotation separation device does not need to add external energy cleaning systems, achieves the object of long-term continuously and stably running, and ensures that the requirement that the micro air bubbles adhere to the dispersed oil, emulsified oil and dissolved oil of small particle size as much as possible is met, thus achieving the object of high-efficiency separation of oil from water. The air flotation separation device is especially suitable for low-consistency water containing oil.

A horizontal rotary reaction device comprises a reactor cylinder, a liquid inlet pipe, a liquid outlet pipe, a gas inlet pipe, a driving device and a supporting device; the two ends of the reactor cylinder are connected with rotary joints, a baffle, a first partition plate and a second partition plate which are vertically arranged are sequentially arranged in the reactor cylinder, and the first partition plate is connected with the second partition plate through a low-temperature liquid inlet pipe; one end of the liquid inlet pipe extends into the cylinder from the front end of the reactor cylinder, the liquid outlet pipe is located in the reactor cylinder, the liquid inlet end of the liquid outlet pipe is connected with the first partition plate, and the liquid outlet end of the liquid outlet pipe extends out of the cylinder from the front end of the reactor cylinder; the gas outlet end of the gas inlet pipe extends into the cylinder from a rotary joint at the tail end of the reactor cylinder; and the driving device is used for driving the reactor cylinder to rotate, and the supporting device is arranged below the reactor cylinder. Slurry mixing, reaction and heat exchange can be carried out synchronously, the driving device drives the reactor to rotate, stirring is uniform, the surface of the cylinder is not prone to scaling, the heat energy utilization efficiency is high, and cost is low.

The invention discloses an electroadsorption desalting regeneration system and an electroadsorption desalting regeneration method, which relate to the field of sewage treatment and are used for solving the problem of a relative poor regeneration effect of an electroadsorption module in the prior art. The system comprises an electroadsorption module to be regenerated, an acid water tank for storing acid liquor, an acid-washing short connected regeneration unit for washing the electroadsorption module by using the acid liquor in the acid water tank, an acid discharging unit for discharging the acid liquor generated after the washing of the acid-washing short connected regeneration unit, a water tank for storing water, a regeneration washing unit for washing the electroadsorption module by using the water stored in the water tank, and a drainage unit for draining the water generated after the washing of the regeneration washing unit. The method comprises the following steps of: performing acid-washing regeneration; discharging the acid liquor; performing regeneration washing; and draining the water. In the invention, an acid-washing regeneration process is added, so that positive ions on a group of the electroadsorption module can be completely displaced to fulfill the aim of complete regeneration.

The invention discloses a detection method of a diaminotoluene (TDA) isomer. The diaminotoluene isomer is determined by adopting a gas chromatographic method. The detection method comprises the following operation steps: (1), obtaining a to-be-detected diaminotoluene isomer test product; and (2), injecting the test product in a gas chromatograph, wherein chromatographic conditions are as follows: a chromatographic column is a polyethylene glycol (PEG) gas-phase capillary-column chromatographic column, a carrier gas is N2, and the starting column pressure is 0.1MPa, column temperature conditions are as follows: the initial temperature is 130 DEG C, and is kept for 5min, the temperature rise rate is 10 DEG C / min, the final temperature is 200 DEG C and is kept for 20min, the temperature of a vaporizing chamber is 250-280 DEG C, an adopted detector is a flame ionization detector (FID), and the detection temperature is 250-280 DEG C. The detection method disclosed by the invention relates to purities of six isomer monomers of TDA and content analysis of all components of a mixture of the six isomer monomers of the TDA, and the minimum detectable quantity reaches 0.001 percent; meanwhile, six isomers of the TDA can be effectively separated and detected, and thus a TDA production device can continuously and stably run for a long time.

The invention discloses a method and a system for desalting and backwashing through electric absorption, belonging to the field of water treatment. The invention aims at solving the problem that the prior art can not ensure both the regeneration effect of an electric absorbing module and higher water yield. The method comprises the following steps of: backwashing the electric absorbing module by water recycled in the previous period, re-backwashing the electric absorbing module by raw water, and recycling water obtained by backwashing through the raw water for backwashing in the next period. The system comprises an electric absorbing module to be regenerated, a recycled water tank, a recycled water backwashing unit, a raw water tank, a raw water backwashing unit and a recycling water unit. By increasing the steps and units on the basis of the prior art, the invention realizes both the regeneration effect of the electric absorbing module and the higher water yield.

The invention relates to a preparation method of a polymer, particularly relates to a polymethyl methacrylate (PMMA) continuous production process for long-time operation without accumulation, and belongs to the technical field of polymer preparation. A polymeric kettle and a stirring warming kettle which enter from the bottom and leave from the top are used, and use a ribbon-type stirrer and chromeplated or polished inner walls; a small amount of an inert solvent is added in the reaction mixture to increase the fluidity of a mixture system; an extruder screw and the inner walls are chromeplated; and by such means as adding a circulation loop and adding a polymerization inhibitor between a distillation column reboiler and a waste liquid tank, the polymer is prevented from being accumulated in a container or a pipeline when the PMMA continuous body is polymerized, and long-time continuous and stable operation is ensured.

The present invention provides a method for evaluating reverse osmosis membrane supply water, a method for water treatment and a water treatment device. The invention can evaluate the quality of reverse osmosis membrane supply water in a short time simply and accurately, thereby operating the water treatment device with the reverse osmosis membrane device stably in a long term. The reverse osmosis membrane supply water evaluation method for evaluating the quality of water supplied to the reverse osmosis membrane device is characterized in that the method detects fluorescence intensity of the reverse osmosis membrane supply water and evaluates the water quality based on the fluorescence intensity detection result. The water treatment device with the reverse osmosis membrane device is operated and managed based on the evaluation result.