23 results about "Chlorate salt" patented technology

The present application relates to a kind of methods for removing heavy metal complex in wastewater, comprising the following steps, S1 configuration PMS composite reagent, the PMS composite reagent is made by including the following weight percentage of raw material ball milling, persulfate 50~90%, sulfite 5~30%, hypochlorite 5~20%;S2 in the heavy metal complex-containing industrial wastewater join the PMS composite reagent obtained in the S1, heavy metal in heavy metal complex is Cu, and one or several of Co, Cr, Ni, Pb and Zn, complex in heavy metal complex is one or several of EDTA, NTA, citric acid, oxalic acid, tartaric acid, sorbic acid, stirring is dissolved, and lye is added to maintain the pH of industrial wastewater to 9.5~11.0, and carries out fenton-like oxidation and breaks the complex reaction, after reaction, aftertreatment is obtained, and the regenerated water is obtained.The present application achieves the purpose of removing heavy metal complex in wastewater by the method of in-situ activation of persulfate without additional catalyst or the application of electricity, ultraviolet and other energy.

The utility model discloses integrated perchlorate treatment equipment which comprises a water storage tank connected with a sewage discharge pipe, a lifting pump is arranged in the water storage tank, and an integral box shell is arranged at the output end of the lifting pump. The middle water tank, the quartz sand filter, the activated carbon filter, the ion exchanger, the pipeline mixer, the precision filter and the two-stage reverse osmosis structure are arranged in the integral box shell and are connected with the output end of the air flotation machine; the bottom end of the air flotation machine is connected with a sludge box through a guide pipe; a plate filter press is arranged at the output end of the sludge box; a plurality of medicament storage tanks are further arranged and are respectively connected with the reservoir, the air flotation machine, the ion exchanger and the pipeline mixer through output pipes. The device disclosed by the utility model is reasonable in structural arrangement, can avoid external interference, is beneficial to improving the overall safety performance, prolongs the service life of the overall structure, does not cause material waste, improves the sewage treatment efficiency, has few byproducts and reduces the treatment cost.

The invention relates to a method and plant for producing hydrogen comprising an electrochlorination unit (10) and a water electrolysis unit (11). In the electrochlorination unit (10), seawater (12) or brine is electrolyzed to produce a liquid hypochlorite stream and an oxygen-polluted hydrogen gas stream. The hydrogen gas is separated from the liquid phase in a degasser vessel (18). High-purity hydrogen produced in the water electrolysis unit (11) from demineralized water (22) is divided into two portions, one portion (37) being mixed with the oxygen-polluted hydrogen in the degasser vessel (18) to form a non-flammable mixed gas, and the other portion (38) being supplied to an ejector (50) for compressing and further concentrating the mixed hydrogen. Optionally, residual oxygen is removed in a DE-OXO unit (54). The invention enables recovery and utilization of hydrogen from electrochlorination processes while improving overall hydrogen yield and safety.

An electrochlorination process includes treating water from a source of water in an advanced water conditioning system that removes at least a portion of anions and cations from the water and produces demineralized water, blending the demineralized water with sodium chloride to form a brine solution, and treating the brine solution in an electrolyzer to form a disinfection solution including sodium hypochlorite having a concentration of chlorate of less than 0.25 mg / L.

The present application relates to a kind of acidic etching waste liquid for FPC copper reduction method, copper reduction liquor and FPC manufacturing system, the method comprises: obtaining acidic etching overflow waste liquid in circuit etching process, the overflow waste liquid includes copper chloride, hydrochloric acid and chlorate;Citric acid is added to acidic overflow waste liquid, and is dissolved and uniformly formed copper reduction liquor, and the citric acid addition amount is 1-10g / L;The temperature of the copper reduction liquor is adjusted to 15-25 ℃;The flexible copper-clad plate is soaked or sprayed using the copper reduction liquor for a certain time;After the flexible copper-clad plate is rinsed and dried, it is placed for use.The copper reduction liquor is composed of acidic etching overflow waste liquid and citric acid.The FPC manufacturing system includes acidic etching device, copper reduction liquor preparation device, copper reduction device and post-processing device.The copper reduction method has the advantages of moderate rate, good controllability and uniform copper reduction.

The invention discloses a perchlorate wastewater treatment device which comprises an automatic lifting assembly, an alarm assembly, a top sealing cover, an auxiliary plate and a wastewater treatment box. The invention belongs to the technical field of wastewater treatment, and provides an automatic lifting assembly and an alarm assembly in order to solve the problem that the water level alarm of an existing perchlorate wastewater treatment device is not obvious enough. When the water level of waste water exceeds the height of the particle storage shell, an L-shaped bent rod automatically drives an auxiliary plate to be lifted, an alarm assembly is synchronously lifted, the alarm assembly penetrates through a moving through groove, and a worker is warned, so that the striking degree of warning the operator is achieved, the warning effectiveness and the equipment safety are improved, and accidents are reduced.

A method for preparing stannate through an electrochemical method comprises the steps that tin powder, alkali liquor with the concentration of 2.0-4.0 M and chlorination liquid with the concentration of 1.0 M are prepared, the alkali liquor is a sodium hydroxide solution or a potassium hydroxide solution, and the chlorination liquid is a sodium chloride solution or a potassium chloride solution; the material molar ratio of Sn to the alkali liquor to the chlorination liquid is 1.0: (2.0-4.0): 1.0; under the stirring condition, tin powder is added into alkali liquor, and suspension liquid is formed; adding a chlorination solution into the suspension, heating to 50-80 DEG C, and keeping the temperature for electrolytic reaction until tin is completely dissolved in the solution; and after electrolysis is completed, filtering while the solution is hot, concentrating filtrate, cooling and crystallizing, carrying out centrifugal separation, and washing and drying separated solid substances to obtain a stannate product. The invention provides a novel method for preparing stannate by electrolyzing a sodium chloride / potassium chloride solution to prepare pypocholoride instead of hydrogen peroxide as an oxidizing agent, and solves the problems of potential safety hazards in storage and transportation, poor product stability and the like in preparation of stannate by using hydrogen peroxide in the prior art.

Methods of manufacturing a moisture-activated powder are provided which provide generation and release of chlorine dioxide without detectable amounts of any toxic by-products such as chlorine gas, chlorites, or chlorates. The powder need not be exposed to light before or during exposure of the powder to moisture or relative humidity to generate the gas. The powder can also be prepared under conditions that minimize or prevent decomposition or oxidation of sodium chlorite or premature moisture activation of the powder during the manufacturing process to maximize its activity.

A system for producing hypochlorite, comprises an electrolyser with an inlet for receiving a saline solution and an outlet for the electrolysation products which include hydrogen and hypochlorite; a tank for separating hydrogen from hypochlorite, and a conduit for facilitating the flow of hydrogen and hypochlorite from the electrolyser to the tank; wherein the system further comprising a further conduit from the tank to the electrolyser to facilitate the circulation of hypochlorite from the tank to the electrolyser; wherein the system further comprises one or more of the following a) a heat exchanger which receives hypochlorite from the further conduit; whereby the temperature of the hypochlorite is adjusted prior to returning to said electrolyser; b) a pump for driving the circulation of hypochlorite from the tank to the electrolyser; the pump being configured to drawn in a saline solution for causing the circulation of the saline solution in conjunction with the hypochlorite solution to the electrolyser.

The invention relates to the field of chlorate electrolysis treatment, and discloses an ionic membrane chlorate electrolysis treatment device which comprises a frame, a plurality of electrolytic cells are arranged in the frame, fastening plates are slidably connected to the interiors of the electrolytic cells, a storage tank is fixedly connected to the top end of the frame, and a liquid level balance mechanism is arranged in the storage tank. And a scraping mechanism is arranged outside the frame, a butt joint mechanism is arranged outside the electrolytic bath, the liquid level balancing mechanism comprises a fixed outer cylinder, and the bottom end of the fixed outer cylinder is fixedly connected to the interior of the storage tank. Liquid in the second backflow pipe flows back to the storage tanks through the water pump, and the two storage tanks balance air pressure through the communicating pipe; liquid enters the movable inner cylinder through the first backflow pipe, overflows into the annular space in a waterfall mode after the liquid level exceeds the top edge of the movable inner cylinder and converges into the main storage tank area, flow fluctuation is flattened, the change of the water head on the weir is extremely small, and it is guaranteed that the pressure in the tank is stable.

The invention relates to a chlorate electrolysis assembly line and an electrolysis process thereof, and relates to the technical field of chlorate electrolyte treatment.The chlorate electrolysis assembly line comprises an electrolytic bath, an impurity cleaning mechanism is arranged in the electrolytic bath, an impurity separating mechanism is installed on the front side of the exterior of the electrolytic bath, and an impurity cleaning mechanism is installed on the left side of the top of the electrolytic bath; the impurity cleaning mechanism comprises a frame, the frame is slidably connected to the interior of the electrolytic tank, a first filter plate is mounted in the frame, bearing seats are fixedly connected to the left side of the exterior of the electrolytic tank, a motor is arranged at the top of the bearing seat on the upper side, and a lead screw is fixedly connected to the output end of the motor; and the lead screw is installed in the two bearing seats, the outer portion of the lead screw is in threaded connection with a screw cylinder, a second filter plate is arranged on the left side in the electrolytic tank, and the screw cylinder and the second filter plate are magnetically attracted. The device has the effects that impurities in the electrolyte are rapidly cleaned out, and the collection efficiency of the impurities in the electrolyte is improved.

Provided is a fire extinguishing agent composition characterized by containing a chlorate (A), containing 6 to 1000 parts by mass of a potassium salt (B) with respect to 100 parts by mass of the total amount of the chlorate, and further containing a divalent or higher metal salt (C), in order to realize adjustment of a combustion rate while maintaining the fire extinguishing performance of the fire extinguishing agent composition.

The invention relates to a perchlorate wastewater treatment method, which comprises: (1) under a stirring condition, adjusting the pH value of clarified perchlorate wastewater to an acidic state, adding a metal reducing agent, carrying out a reduction reaction, adjusting the pH value of the wastewater to a weak alkaline state by using a sodium carbonate solution, and filtering to obtain a reduced liquid; and (2) carrying out column-loading targeted deep adsorption on the reduced solution obtained in the step (1) by using anion exchange resin to obtain a solution subjected to adsorption deep treatment. The method disclosed by the invention is efficient, rapid, stable, short in flow, low in cost, safe and reliable in wastewater treatment process, simple to operate, environment-friendly, free of secondary pollution, capable of realizing up-to-standard discharge and suitable for industrial production.

The invention discloses a Fe monatomic catalyst as well as a preparation method and application thereof, and belongs to the field of oxidation catalytic materials and fine chemical engineering. The preparation method comprises the following steps: 1) dispersing SiO2 in a solvent, sequentially adding a ligand and FeCl2. 4H2O, carrying out ultrasonic dispersion, and continuously stirring; 2) performing rotary evaporation on the system obtained in the step 1) to obtain solid powder, and fully drying and grinding the solid powder; and (3) putting the powder obtained in the step (2) into a tubular furnace, heating, carrying out pyrolytic reaction, and treating after the reaction is finished, so as to obtain the Fe monatomic catalyst. The preparation method is simple, raw materials are easy to obtain, and industrial production is easy. The Fe monatomic catalyst prepared by the preparation method disclosed by the invention is used for activating a chlorite selective oxidation aromatic hydrocarbon derivative, and the adsorption and activation capability of sodium chlorite can be enhanced, so that the Fe monatomic catalyst has high selectivity on the oxidation aromatic hydrocarbon derivative, and the oxidation selectivity on the aromatic hydrocarbon derivative is improved.

The application relates to the technical field of air purification, and discloses an air purification agent which comprises a solid-phase paste and a solid-phase activator; the paste comprises, in terms of weight fractions, 9-12 parts of cellulose thickening powder, 4-6 parts of sodium alginate, 1.5-2.5 parts of chitin, 13-16 parts of chitosan, 0.5-1.2 parts of zinc oxide, 1.5-2.5 parts of chlorate and 60-70 parts of water; the activator comprises, in terms of weight fractions, 18-23 parts of condensate, 45-55 parts of citric acid and 10-40 parts of flower fragrance; the air purification agent has high stability and a long purification cycle.

The application relates to the field of gas fire extinguishing of fire-fighting equipment, and discloses a low-temperature and low-corrosion hot aerosol fire extinguishing medium, a preparation method and application thereof. The hot aerosol fire extinguishing medium comprises an oxidant and modified aluminum hydroxide, the oxidant is a mixture of strontium nitrate, potassium organic acid and chlorate, the content of silane groups in the modified aluminum hydroxide is 10-30 wt%, and the weight ratio of the oxidant to the modified aluminum hydroxide is 1:0.01-0.5. The hot aerosol fire extinguishing medium is stable in performance during combustion, can effectively reduce the combustion temperature, significantly improve the fire extinguishing efficiency, and simultaneously reduce the corrosiveness to electrical equipment.

The invention relates to a device and a method for reducing an index of chlor-alkali sodium chlorate. The device comprises a vertical cylinder; the tangential feeding pipe is connected with the side wall of the vertical cylinder body and is used for tangentially introducing chlorine-containing saline water after chlorate decomposition along the inner wall of the vertical cylinder body so as to form rotational flow in the vertical cylinder body; the chlorine outlet is formed in the top end of the vertical barrel and is used for discharging separated chlorine; the acidic brine outlet is formed in the bottom end of the vertical cylinder and is used for discharging separated acidic brine; and the horizontal pore plate is fixed in the vertical cylinder body and is positioned below the tangential feeding pipe, and through holes are formed in the horizontal pore plate and are used for uniformly distributing the descending acidic brine and inhibiting gas entrainment. According to the device, liquid column impact at the moment when the chlorate decomposition circulating pump stops is converted into controllable rotational flow energy, impact is synchronously eliminated through three-stage inhibition, and acid brine recycling is completed.

Provided is a method for producing chlorous acid water using a salt as a raw material. The present invention provides a method for producing chlorous acid water, comprising: 1) a step for electrolyzing a salt to obtain an aqueous chlorate solution; 2) a step for generating a first reaction gas containing chlorine and chlorous acid using a partial acid, and capturing the first reaction gas in an aqueous solution containing chlorous acid using a neutralizing agent; and 3) a step for obtaining an aqueous solution containing chlorous acid by generating a second reaction gas containing chlorous acid and chlorine dioxide using the remaining acid and hydrogen peroxide after confirming that the first reaction gas is not generated, and capturing the second reaction gas in the aqueous solution containing chlorous acid using a neutralizing agent, the step involves reducing the aqueous chlorate solution.

The application discloses an arsenic concentration prediction method and device of water, electronic equipment and storage medium, and relates to the field of water treatment. The method comprises the following steps: acquiring the arsenic concentration value, pH value, oxidation-reduction potential, flow and temperature parameters of water; determining the dosing amount of reagent according to the aforementioned parameters; taking the arsenic concentration value of water before treatment, the dosing amount of hypochlorite and iron salt as input samples, and taking the arsenic concentration value of water after treatment as output samples; pre-training an error inverse feedback neural network prediction model to generate an arsenic concentration prediction model; adjusting the size of the dosing amount of hypochlorite and / or iron salt, combining the arsenic concentration prediction model to obtain the predicted arsenic concentration value of water after treatment, correcting the arsenic concentration prediction model, and optimizing the size of the dosing amount of hypochlorite and iron salt. Through the method, the problem that current water arsenic removal relies on human experience, cannot be fully automated, and the inaccurate dosing amount of reagent easily leads to reagent waste is solved.

The utility model belongs to the technical field of wastewater treatment, and discloses an integrated treatment device for perchlorate wastewater. Comprising a treatment box, the top end of the treatment box is rotatably connected with a top cover through a rotating shaft, and the top end of one side of the treatment box is fixedly connected with a water inlet pipe. The first treatment pond and the second treatment pond are cleaned through scraping plates on cleaning plates, the interiors of the first treatment pond and the second treatment pond are kept clean, when sediments on the two sets of cleaning plates need to be cleaned, racks can be pulled towards one side to drive inserting rods to extrude springs, so that the racks can be moved away from one side of a gear, and therefore the sediments on the two sets of cleaning plates can be cleaned. And then the rack, the connecting rod and the cleaning plate are taken out together for cleaning, so that the problem that sediments are accumulated in the treatment tank after the wastewater is cleaned is solved.

The invention discloses a chlorate electrolyte concentration control device and method based on electrolyte circulating tanks. The chlorate electrolyte concentration control device comprises an electrolytic tank, a plurality of electrolyte circulating tanks arranged in sequence from high to low, a sodium chlorate head tank and an electrolyte middle tank. A sodium chlorate solution from an elevated tank enters a first circulating tank and is fed into an electrolytic tank by a circulating pump for an electrolytic reaction; and the electrolyte flows back to the first circulating tank through the liquid outlet header pipe. And the upper part of each circulating tank is provided with an overflow port, and the electrolyte sequentially overflows to the next-stage circulating tank after the liquid level rises. And each circulating tank is provided with a circulating pump, and the electrolyte is adjusted to a proper temperature through a heat exchanger and then is sent back to the electrolytic tank for continuous electrolysis, so that chlorate is gradually consumed. And the concentration of the electrolyte is gradually reduced through multi-stage circulation and stage-by-stage staying. According to the invention, the concentration of the electrolyte is continuously and stably controlled, and the electrolysis efficiency is improved.

The chlorate electrolytic bath structure capable of reducing the electric energy loss comprises a supporting frame and an electrolytic bath body arranged on the upper end face of the supporting frame, and a first conductive connecting plate and a second conductive connecting plate are arranged on the inner side of the electrolytic bath body. The gap between the contact surfaces of the anode plate and the first conductive connecting plate can be reduced, the conductive effect between the anode plate and the first conductive connecting plate is improved, and the electric energy loss during equipment use is reduced; besides, new electrolyte can be intermittently added to the inner side of the electrolytic bath body, the problem that the electrolyte electrolytic reaction is incomplete due to the fact that the concentration of the electrolyte on the inner side of the electrolytic bath body is too low is solved, meanwhile, chlorine generated by the electrolyte electrolytic reaction can be collected and treated in a unified mode, and the chlorine utilization rate is increased. The problem that chlorine is directly discharged into air to pollute the air is avoided, and meanwhile, impurities attached to the diaphragm can be cleaned, so that the problem of local blockage of the diaphragm caused by accumulation of isolating substances on the diaphragm can be solved.

The application provides a normal-temperature aluminum water metal fuel propellant and a preparation method thereof, and belongs to the technical field of solid propellants. The application uses aluminum powder as fuel, which can save the cost of propellant and improve the energy characteristics of the propellant. The application uses aluminum hydride as a fuel additive, which increases the hydrogen content in the fuel, reduces the flame temperature of the propellant, and improves the specific impulse of the propellant. The application uses perchlorate and sodium sulfate hydrate as an oxidizing agent. The sodium sulfate hydrate stores water in the form of crystal water in the propellant, which overcomes the disadvantage that the aluminum / ice propellant needs to be stored at low temperature. Under normal temperature conditions, the sodium sulfate hydrate has good stability and is not easy to decompose or lose crystal water, thereby prolonging the service life of the propellant. In the combustion process, the sodium sulfate hydrate can be dehydrated to provide an oxidizing agent for the propellant and can be decomposed to generate a working medium, thereby improving the specific impulse of the propellant.