198 results about "Coking wastewater" patented technology

The utility model relates to a silicon and fluorine removal device for a coking wastewater zero-discharge membrane high-power concentrated solution. The silicon and fluorine removal device comprises a deep silicon removal unit, an alternate fluorine removal precipitation unit and an accurate fluorine removal unit which are sequentially connected in series, the deep silicon removal unit comprises a silicon removal reaction tank and a silicon removal sedimentation tank which are connected in series, a silicon removal stirrer is arranged in the silicon removal reaction tank, and a first flocculant adding device and a first liquid alkali adding device are arranged on the silicon removal reaction tank; the alternate defluorination sedimentation unit comprises a defluorination sedimentation tank, a defluorination stirrer is arranged in the defluorination sedimentation tank, effluent of the defluorination sedimentation tank is conveyed into the defluorination sedimentation tank, and a first sulfuric acid adding device is arranged on a pipeline between the defluorination sedimentation tank and the defluorination sedimentation tank; the precise defluorination unit comprises a second-stage defluorination reaction tank and a second-stage defluorination clarification tank which are connected in series, a water inlet pipeline of the second-stage defluorination reaction tank is provided with a second flocculant adding device and a second sodium hydroxide adding device, and effluent of the defluorination sedimentation tank is fed into the second-stage defluorination reaction tank.

The invention discloses a biomass-inorganic-organic ternary composite flocculant and a preparation method and application thereof, and belongs to the field of coking wastewater treatment.The preparation method comprises the steps that chitosan serves as a substrate material, glutaraldehyde serves as a cross-linking agent, and polyferric sulfate (PFS) and chitosan are subjected to chemical cross-linking to generate an intermediate product PFS and chitosan composite particles; then potassium persulfate is used as an initiator, graft copolymerization of acrylamide and methacryloyloxyethyl trimethyl ammonium chloride is initiated through hydroxyl on the surface of PFS-chitosan, a cationic branched chain is introduced, and a final product is obtained. Through multi-component cooperation and structural design, the defects that a traditional flocculating agent is not thorough in demulsification, large in sludge amount, unstable in floc combination and the like in coking wastewater treatment are overcome, and the flocculating agent is particularly suitable for treating oil pollutants in coking wastewater.

The utility model provides a coking wastewater outlet device, which relates to the technical field of coking wastewater treatment and comprises a treatment barrel, a fixing ring, supporting legs, a box cover, a partition plate, a filter plate and a flocculant adding component. Liquid flocculants are added into the feeding pipe and enter the storage box, liquid in the storage box is finally discharged into the treatment barrel through the multiple sets of water outlet pipes under the action of the pump body, the motor drives the rotating shaft and the driving wheel to rotate, the driven wheel and the feeding pipe are further driven to rotate, and the liquid flocculants are discharged into the treatment barrel through the multiple sets of water outlet pipes. A plurality of groups of water outlet pipes rotate along with the rotation of the fixed pipe, so that a liquid flocculant is uniformly sprayed out in the treatment barrel, and a scraper plate continuously cleans the outer surface of a filter plate along with the rotation of the fixed pipe, so as to keep the filter plate unobstructed. And the filter screen is not provided with an effective cleaning mechanism, so that the phenomenon of blockage is easily caused.

The invention discloses a method for preparing a porous carbon material by recycling coal gasification slag and semi-coke wastewater, which comprises the following steps: by taking coal gasification fine slag as a carrier and semi-coke wastewater as a phenol source, carrying out flotation-acid leaching modification on the fine slag to purify a carbon-rich component and optimize the surface adsorption activity of the carbon-rich component; then fully adsorbing phenolic substances in the wastewater by utilizing the modified slag body; introducing a composite aldehyde cross-linking agent, and initiating an in-situ phenolic aldehyde polymerization reaction to generate a composite precursor; the precursor is subjected to high-temperature carbonization and alkali activation pore forming, and finally the porous carbon material with the characteristics of high specific surface area, rich graded pores and low ash content is prepared. According to the process, full-amount collaborative recycling of the two wastes is achieved, and the process is green and free of secondary pollution. The obtained material is high in carbon content and rich in defect structure and surface functional groups, shows excellent adsorption capacity and catalytic carrier performance, can be widely applied to the fields of deep purification of water pollutants, adsorption of volatile organic compounds, energy catalysis and the like, and has remarkable environmental protection benefits and resource economic values.

The application relates to a coking wastewater advanced treatment device, which comprises an aerobic tank, a horizontal shaft is arranged in the aerobic tank along the water flow direction, a plurality of coaxial rotating discs are arranged on the shaft at intervals, the rotating disc is hollow, the surface of the rotating disc is hollowed out, and the rotating disc is filled with bacteria culture fillers; a screw rod is arranged at the bottom of the inner side of the aerobic tank, the screw rod is parallel to the shaft, the same side ends of the shaft and the screw rod pass out of the aerobic tank, and the passing-out end of the shaft is in transmission connection with the passing-out end of the screw rod; a sludge discharge pipe is arranged at the bottom of the side wall of the aerobic tank, a vertical scraper is arranged at the bottom of the inner side of the aerobic tank, screw holes are arranged on the scraper, and the screw rod is matched with the screw holes. The bacteria film and the attachments on the surface of the fillers can be stripped through mutual collision and friction between the fillers, so that water flow exchange in and out of the fillers is smoother.

The utility model belongs to the technical field of industrial wastewater treatment, and particularly relates to a coking wastewater treatment system for industrial continuous production. Comprising a decomposition bin which comprises a moisture evaporation bin, an ammonia decomposition bin, a horizontal transmission belt penetrating through the moisture evaporation bin and the ammonia decomposition bin, a sedimentation tank, a filter connected to an outlet of the sedimentation tank, and a buffer bin connected to an outlet of the filter. The coking wastewater generates struvite in the sedimentation tank, redundant water is filtered out in the filter, and the struvite is stored in the surge bin and then sent to the decomposition bin. The ammonia gas enters the water evaporation bin through the horizontal conveying belt to evaporate redundant water, and then is fed into the ammonia gas decomposition bin to be thermally decomposed to release ammonia gas. The buffer bin can enable intermittent work of the filter not to affect continuous production of the system, the decomposition bin can achieve continuous evaporation dehydration and thermal decomposition processes, the wastewater treatment efficiency is improved, meanwhile, struvite decomposition products are reused in wastewater treatment, cyclic utilization of resources is achieved, and the energy consumption is reduced. The method has good economic benefits and environmental benefits.

The utility model relates to the technical field of wastewater treatment, in particular to a high-efficiency defoaming device for coal coking wastewater treatment, and aims to solve the technical problem of poor defoaming effect caused by difficulty in uniformly covering a sedimentation tank with a larger area during feeding. The threaded shaft is in threaded connection with a scraping plate, the scraping plate is slidably connected to the sliding rail, the upper portions of the two sliding ends of the scraping plate are each provided with a corresponding defoaming mechanism, the defoaming mechanisms are connected to the side wall of the sedimentation tank, the defoaming mechanisms can add a defoaming agent to the lower portion, and foam is scraped to the two sides of the sedimentation tank through the scraping plate moving back and forth in the sedimentation tank; the defoaming mechanisms located on the upper portions of the two sides of the sedimentation tank add defoaming agents downwards to eliminate foams, so that all the foams can be covered without even adding, compared with full-tank adding, the agent consumption can be reduced, and the scraper advances on the liquid level of the upper portion of the sedimentation tank, and precipitation on the lower portion cannot be affected.

This invention provides a semi-coke wastewater treatment device and process. The semi-coke wastewater treatment device comprises, in sequence, a semi-coke production wastewater conditioning system, an electrolytic flotation system, a freeze crystallization system, a salt phase conditioning system, a high-temperature wet oxidation system, and an ammonia nitrogen stripping and distillation system. The freeze crystallization system is connected to an aqueous phase conditioning system, a BDD electro-oxidation system, and a biochemical system. The ammonia nitrogen stripping and distillation system is connected to the biochemical system. This invention effectively solves a series of technical problems in existing semi-coke wastewater treatment devices, such as lengthy process flows, high equipment investment and operating energy consumption, and clogging of the ammonia stripping and phenol removal unit due to phenol polymerization and coking, and oil adhesion. This invention also provides a semi-coke wastewater treatment process.

The utility model relates to a catalytic ozonation tower for advanced treatment of coking wastewater, which comprises an upper tower section and a lower tower section, the top of the lower tower section is detachably communicated with the bottom of the upper tower section, a plurality of partition plates are vertically distributed in the lower tower section at intervals, one end of each partition plate is fixedly connected with the inner side wall of the lower tower section, and a gap is reserved between the other end of each partition plate and the inner side wall of the lower tower section. The fixed ends of every two adjacent partition plates are opposite, an ozone channel is arranged in the fixed end of each partition plate, air inlet pipes are arranged on the left outer side and the right outer side of the lower tower section, the two air inlet pipes are communicated through a conveying pipeline, one end of each ozone channel is communicated with the adjacent air inlet pipe through an air inlet branch pipe, and the other end of each ozone channel is communicated with an aeration head fixedly arranged at the bottom of the corresponding partition plate. Two mesh plates are distributed between the aeration head and the free end of the corresponding partition plate, a catalyst is filled between the two mesh plates, and the bottom of the lower tower section corresponding to the fixed end of the lowermost partition plate is communicated with a water inlet pipe. According to the utility model, multiple aeration mixing and catalytic oxidation of wastewater can be realized, and the overall treatment quality is higher.

The present application relates to a kind of coking wastewater advanced treatment method and system, method includes: the water quality characteristics of coking wastewater are pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler;Coking wastewater is sent into biochemical pool and carries out biochemical reaction, and modified polyurethane suspended filler is placed in biochemical pool;The effluent of biochemical pool is sent into electro-catalytic oxidation device and carries out electrolysis reaction, and electro-catalytic oxidation device uses modified anode electrode as anode electrode, and uses graphite electrode as cathode electrode;The effluent of electro-catalytic oxidation device is sent into filler adsorption tower and carries out adsorption treatment, and modified fly ash filler is placed in filler adsorption tower.The present application is pre-configured with modified polyurethane suspended filler, modified anode electrode and modified fly ash filler for coking wastewater advanced treatment for the water quality characteristics of coking wastewater, can economically and efficiently reduce the content of TOC, total fluorinated alkyl compound and total cyanide in coking wastewater.

The present application relates to a kind of new process combination for coke wastewater evaporation treatment, and the present application discloses a kind of new process combination for coke wastewater evaporation treatment.The process is first to coke wastewater for deacidification, ammonia evaporation pretreatment, after adding liquid alkali and inhibitor, in turn into one effect, two effect falling film evaporation system and three effect double-heater forced circulation evaporation system, each effect separator is equipped with demister to strengthen gas-liquid separation, to prevent mist entrainment.Three effect concentrated liquid is separated by centrifugal desalting, mother liquor is recovered with carbon dioxide decomposition process, and the clear liquid is recycled;Each effect condensate is uniformly collected and can be directly introduced into biochemical treatment, and the water quality is stable and up to standard.The present application solves the problems of easy scaling, corrosion, high energy consumption and unstable effluent in traditional process by using heat energy cascade utilization, anti-fouling structure and corrosion-resistant material, and has the advantages of stable operation, energy saving, high resource utilization rate and long-term continuous operation, and is suitable for efficient treatment and resource recovery of high-salt and high-phenol coke wastewater.

A phenol extraction system for semi-coke wastewater treatment is characterized in that a solvent conveying header pipe is divided into two paths, one path is connected with a solvent inlet in the lower part of a first extraction tower, and the other path is connected with a solvent inlet in the lower part of a second extraction tower; the upper part of the first extraction tower is connected with a wastewater input pipe and an extract overflow pipe, an extract input port at the lower part of the first extraction tower is connected with an extract output port of an extract tank through an extract conveying pump set, and an extract input port of the extract tank is connected with an extract output port at the upper part of the second extraction tower; a wastewater output port at the bottom of the first extraction tower is connected with an input port of a wastewater conveying pump set I, an output port of the wastewater conveying pump set I is connected with a wastewater inlet at the upper part of the second extraction tower, and a wastewater output port at the bottom of the second extraction tower is connected with an input port of a wastewater conveying pump set II; and an output port of the wastewater conveying pump set II is connected with the extracted wastewater conveying pipe. The device disclosed by the utility model has the advantages of high removal efficiency of phenolic substances and stability in operation.

The invention discloses a coking wastewater treatment method based on gas ratio combined precipitation, which comprises the following steps: adding an acidic reagent and PAM (polyacrylamide) into coking wastewater, and removing small molecular weight toxic substances, specifically thiocyanide and cyanide, and large molecular weight toxic substances, specifically more than ternary phenol and tar in the wastewater through a gas ratio combined precipitation device, the method comprises the following steps: treating the coking wastewater through a GDiAR-F anaerobic reactor, removing three-element or less phenol and macromolecular COD (Chemical Oxygen Demand) through a GDiAR-F anaerobic reactor, removing micromolecular COD, ammonia nitrogen, TN (Total Nitrogen) and TP (Total Phosphorus) in the wastewater through a secondary A / O (Anaerobic / Oxic) device, and finally enabling the effluent to reach the standard, thereby completing the comprehensive and efficient treatment The coking wastewater is treated by adopting a gas ratio combination precipitation device, a GDiAR-F anaerobic reactor and a secondary A / O device, so that the effluent of the coking wastewater is stably discharged in a standard reaching manner. The method does not need to add activated carbon, is simple to operate and low in cost, can greatly reduce the operating cost of each ton of wastewater, and achieves the direct emission standard of Emission Standard of Pollutants in Coking Industry, thereby having wide development potential.

The present application belongs to the technical field of wastewater treatment, and relates to a method for pretreating coking wastewater by zero-valent iron process combined with ultrasonic-flocculation method, comprising the following steps: 1) the wastewater is subjected to heating and ultrasonic degradation treatment; 2) air is introduced into the wastewater after ultrasonic degradation, and a composite flocculant, iron filings and coal-based acicular coke powder are sequentially added, and ultrasonic stirring and standing and sedimentation are performed to complete the pretreatment. The present application provides a method for pretreating coking wastewater by zero-valent iron process combined with ultrasonic-flocculation method, which effectively removes pollutants in the coking wastewater, improves the subsequent biodegradability of the wastewater, has low implementation cost, and has large-scale popularization and application value.

This invention pertains to a coking wastewater oil removal device in the field of coking wastewater treatment technology. Multiple floats (15) are arranged around the filter pipe (13) of the floating oil suction component. The floats (15) are connected to the filter pipe (13) via a connecting frame (14). A recessed structure (40) is provided at the upper end of the filter pipe (13), and an opening is provided on the recessed structure (40) to connect to the filter pipe (13). A telescopic pipe (17) is connected to the lower end of the filter pipe (13). One end of the telescopic pipe (17) is connected to a rope (7), and the other end of the rope (7) passes around a pulley (5) and connects to a lifting motor (12). The telescopic pipe (17) extends to the outside of the sedimentation tank (8) and connects to the main oil outlet pipe (34). The coking wastewater oil removal device of this invention has a simple structure, can conveniently and quickly remove oil from coking wastewater, and can reliably adjust the sinking depth of the floating oil suction device in the sedimentation tank.

The utility model belongs to the technical field of treatment devices, and particularly relates to a coking wastewater ozone catalytic oxidation advanced treatment device, which comprises a reaction tower, a catalytic oxidation device, a catalytic oxidation device and a catalytic oxidation device, the ozone generator can guide ozone into the cavity; the driving assembly can apply rotating force into the cavity, so that the catalytic ozonation advanced treatment of the coking wastewater is more uniform; and the collecting assembly is coupled with the driving assembly, the collecting assembly is set to rotate along with the driving assembly and collect floating foam in the cavity, the driving piece is started to drive the first rod to rotate, the first rod drives the third rod to rotate, the third rod drives the plate body to rotate, and the plate body drives the collecting protrusion to rotate; at the moment, the collecting protrusions continuously make contact with the floating foam above the liquid level in the cavity, part of the floating foam is collected between the plate body and the collecting protrusions to be stored, and therefore the influence of the floating foam on the interior of the cavity is reduced.

The application relates to an oil-displacing demulsifier and a preparation method thereof. First, magnetic carbon nanotubes are prepared by depositing ferric chloride hexahydrate and copper sulfate pentahydrate on the surface of carbon nanotubes; second, hyperbranched polymers with terminal double bonds are prepared; then, the two are mixed to obtain hyperbranched grafted magnetic carbon nanotubes; finally, allyl polyoxyethylene ether is continuously polymerized in situ to obtain the oil-displacing demulsifier. The oil-displacing demulsifier prepared by the application is suitable for oil-displacing demulsification treatment of coking wastewater in the early stage. The coking wastewater is complex in composition, contains little oil, but contains a lot of organic components. The polyether with multiple branched chains can form a net trapping effect in the water body, so that oil and water can be quickly gathered and separated in an emulsified state, and the oil removal rate can reach more than 97%. Meanwhile, the demulsifier has magnetism, can be recycled through magnetic separation, and the oil removal rate can still reach more than 92% after ten cycles of demulsification. The oil removal effect is good with a small amount of addition, and the coking wastewater treatment process is simplified.

The invention discloses a semi-coke wastewater treatment process and a resource utilization method, and relates to the technical field of wastewater treatment. Relates to a combined method for adjusting oil separation, alkaline coagulation, electrocatalytic flotation oil removal, acidification demulsification and filtration, extraction dephenolization, multistage countercurrent centrifugal extraction and crude phenol recovery, alkaline stripping deamination and ammonium sulfate recovery, and can efficiently remove oil, phenols and ammonia nitrogen pollutants, realize resource recovery and enable effluent to reach the standard. The process is compact in structure and simple and convenient to operate, does not depend on a complex biochemical or membrane technology, has good industrial applicability, and provides a feasible wastewater zero discharge and resource utilization path for semi-coke production enterprises.

According to the semi-coke wastewater zero-discharge treatment device and method, for semi-coke wastewater subjected to oil removal, ammonia distillation and dephenolization pretreatment, firstly, the oil content is reduced to be smaller than 20 mg / L through nitrogen gas flotation, and the wastewater is subjected to hydrolytic acidification, two-stage anaerobic and aerobic biochemical treatment and secondary sedimentation to be subjected to primary biochemical treatment till the COD is smaller than 150 mg / L; secondly, further reducing COD (Chemical Oxygen Demand) to 60mg / L through dosing coagulation reaction precipitation, catalytic ozonation and BAF (Biological Aerated Filter) deep biochemical treatment; heavy metals, hardness and suspended matters are removed through reaction precipitation and multi-stage filtration, a reverse osmosis system is used for concentration and purification, pure water with TDS smaller than 300 mg / L is produced for reuse, and the TDS of concentrated water reaches 120000 mg / L; finally, the concentrated water is subjected to evaporative crystallization hot-method salt separation through MVR, sodium chloride with the purity being 98.5% and anhydrous sodium sulfate with the purity being 98% are produced, and the purpose of semi-coke wastewater zero-discharge treatment is achieved.

The invention relates to the technical field of waste resource utilization, in particular to an amino capronitrile residue modified titanium silicalite molecular sieve as well as a preparation method and application thereof. The method comprises the following steps: by taking a waste titanium silicalite molecular sieve as an adsorbent, carrying out adsorption treatment on the coking wastewater by adopting the adsorbent, and carrying out primary ball milling and primary drying treatment to obtain a pretreated titanium silicalite molecular sieve; and mixing the pretreated titanium silicalite molecular sieve, the amino-capronitrile residue and an aldehyde compound, and carrying out secondary ball milling and secondary drying treatment to obtain the amino-capronitrile residue modified titanium silicalite molecular sieve. According to the method, the waste titanium silicalite molecular sieves adsorbing the coking wastewater are subjected to surface modification by taking the amino capronitrile residues as a modifier, so that the problems of poor dispersity and poor interfacial compatibility of the waste molecular sieves in a rubber matrix are solved, and the mechanical property of the rubber composite material is also remarkably improved; therefore, the purposes of treating waste with waste and harmlessness and resource utilization of solid waste are achieved.

The invention discloses a collaborative deep purification method and system for phenol-cyanamide in coking wastewater, and belongs to the technical field of industrial wastewater treatment. According to the invention, a quality-based grading and recycling coupled system is adopted, and oil-water separation and soluble tar reduction are simultaneously realized through front-stage pretreatment, so that the subsequent treatment load is effectively reduced; catalytic oxidation and ozone oxidation are synergistically enhanced in the middle section, so that favorable conditions are created for biochemical treatment; the biochemical section is used for constructing a poison-resistant flora and coupling a short-cut nitrification and denitrification or anaerobic ammonia oxidation process to realize low-carbon denitrification; at the tail end, through the synergistic effect of membrane separation and selective adsorption, the water quality of recycled water is guaranteed, and meanwhile resource recycling of ammonia nitrogen is achieved.

This invention discloses an indium phosphide quantum dot-bismuth tungstate composite material, its preparation method, and its application, relating to the field of photocatalytic materials technology. The preparation method includes the following steps: Indium precursor is added to oleylamine and mixed; the mixture is gradually heated and kept at a constant temperature under nitrogen protection; then, tris(diphenylphosphine) is added at 170-190°C to react and obtain indium phosphide quantum dots; bismuth nitrate is dispersed in water, and hexadecyltrimethylammonium bromide and sodium tungstate are added sequentially, followed by a hydrothermal reaction to obtain bismuth tungstate microflowers; indium phosphide quantum dots and bismuth tungstate microflowers are added to deionized water, mixed evenly, heated to react, cooled to room temperature, washed, and dried to obtain the indium phosphide quantum dot-bismuth tungstate composite material. This invention also discloses the indium phosphide quantum dot-bismuth tungstate composite material prepared by the above method and its application. This composite material has the function of photocatalytic H2O2 production and has significant application value in the treatment of coking wastewater.

The invention relates to the technical field of wastewater treatment, in particular to a coking wastewater treatment device and method.The coking wastewater treatment device comprises a box body, a plurality of supporting seats and a filter assembly, the supporting seats are arranged at the bottom of the box body, and the filter assembly comprises a filter plate, a cylinder, a through groove, a butt joint plate, a round hole, a sliding assembly and a first bolt; the filter plate is fixedly connected with the inner wall of the box body, the through groove is formed in the box body, one end of the cylinder is connected with the filter plate, the sliding assembly is arranged on the side face of the box body, the sliding assembly is connected with the butt joint plate through the first bolt, the butt joint plate is matched with the through groove, and the through groove is formed in the box body. A circular hole is formed in the butt joint plate, the circular hole is matched with the cylinder, and a liquid outlet assembly is arranged at the bottom of the front face of the box body. According to the coking wastewater treatment device and method, the problem that existing equipment is inconvenient to clean is solved.

The invention discloses a GN (at) Ti / NiO-x00 anode electro-catalytic material and a preparation method of the GN (at) Ti / NiO-x00 anode electro-catalytic material. The method comprises the following steps: electroplating nickel on the surface of a titanium substrate to form a nickel intermediate layer, annealing to change the surface crystal form structure and refine intermediate layer grains, and carrying out high temperature and hydrogen catalytic reduction on acetylene gas on the surface of the nickel intermediate layer of the titanium substrate to form a graphene active layer on the surface through chemical vapor deposition. The nickel-plated graphene doped titanium substrate non-noble metal electrode, namely the GNatTi / NiO-x00 anode electro-catalytic material, is obtained. The titanium-based electrode plate is subjected to nickel plating and loaded with the graphene layer, so that active sites on the surface of the electrode are increased, the electrocatalytic activity is improved, peeling of the coating is reduced, the efficiency of degrading complex coking wastewater is greatly improved, the electrode has high economic benefits, and compared with a traditional commercial precious metal electrode, the electrode has the advantages that the cost is low, and the application range is wide. The material is a novel composite electrode material with excellent electrochemical performance.

The invention discloses a multi-stage plate-type electro-catalytic membrane reactor for degrading organic matters in reverse osmosis concentrated water of coking wastewater and application of the multi-stage plate-type electro-catalytic membrane reactor. The multi-stage plate-type electro-catalytic membrane reactor is internally provided with a chamber for electrochemical reaction, and consists of a plurality of cathode chambers and anode chambers which are the same in number and are uniformly alternated, a conductive contact pin, a water inlet end and a water outlet end, the distance between every two cavities is 10 mm, the multiple cathode chambers and the multiple anode chambers which are the same in number and are evenly and alternately arranged are detachable plate faces, operation is convenient, and environment friendliness is achieved. The multi-stage plate-type electro-catalytic membrane reactor is simple in design, wastewater runs in the reactor in a circulation mode, mass transfer can be improved, the electrochemical active surface area can be increased, the current utilization efficiency can be improved through a parallel power connection mode, and the service life of the reactor is prolonged. The device has the advantages of high organic matter removal efficiency, convenience in actual operation, automatic management, good stability, low operation energy consumption, reusability and the like, and has research significance in the field of electrochemical water treatment.

The present invention discloses a treatment agent for removing nitric acid from dilute sulfuric acid and a preparation and use method thereof, belonging to the technical field of coking wastewater treatment. The treatment agent for removing nitric acid from dilute sulfuric acid is composed of a carrier and a reactive component; the carrier is an activated corn cob, and the carrier accounts for 50% to 70% of the total mass of the treatment agent; the reactive component is prepared by mixing ammonium thiocyanate, ammonium thiosulfate, and urea in a mass ratio of 6 to 8:1 to 2:1 to 2. The nitric acid treatment agent is used to treat the mixed acid, thereby increasing the utilization rate of the dilute acid and the yield of ammonium sulfate. The present invention effectively solves the problem of increased operating costs caused by the waste of impure dilute sulfuric acid in waste liquid acid production, equipment corrosion, foaming, and destruction of ammonium sulfate crystals.

The invention discloses a method for carrying out electrochemical oxidation treatment on semi-coke wastewater and coupling a cathode to produce hydrogen, and belongs to the field of electrochemical treatment on wastewater. According to the method, a foam nickel-based nickel-iron catalyst is used as an anode, diluted semi-coke wastewater is alkalized and then is used as an anode electrolyte, oxidative degradation of high-COD and high-ammonia-nitrogen semi-coke wastewater is realized under a three-electrode system, and hydrogen is generated by coupling a cathode. According to the method, the conditions are mild, the stability is good, the high removal rate of COD, NH3-N and TOC can be achieved, meanwhile, hydrogen is generated by the cathode, and resource utilization of the wastewater is achieved.

An ammonia three-stage liquid separation system for semi-coke wastewater treatment is characterized in that an inlet A of a first-stage fractional condenser is connected with a crude ammonia gas conveying pipe, an outlet A of the first-stage fractional condenser is connected with a feeding hole of a first-stage liquid separation tank, an inlet B of the first-stage fractional condenser is connected with a raw material water conveying pipe, and an outlet B of the first-stage fractional condenser is connected with a raw material water inlet of a deamination tower; a bottom drain pipe of the first-stage liquid separation tank is connected with an inlet of the ammonia condensate cooler, a top exhaust pipe is connected with a feed port of the second-stage liquid separation tank through the second-stage fractional condenser, a bottom drain pipe of the second-stage liquid separation tank is connected with an inlet of the ammonia condensate cooler, and a top exhaust pipe is connected with a feed port of the third-stage liquid separation tank through the third-stage fractional condenser; a liquid discharge pipe at the bottom of the third-stage liquid separation tank is connected with an outlet of the ammonia condensate cooler in parallel and is connected with an inlet of the ammonia condensate oil separation tank, an exhaust pipe is arranged at the top of the third-stage liquid separation tank, an oil discharge port of the ammonia condensate oil separation tank is connected with a light oil collection tank, and a liquid discharge port is output through an ammonia condensate pump. According to the device, a three-stage liquid separation structure is adopted, and the recovery rate of ammonia can be effectively improved through fractional condensation and liquid separation step by step.

The present application relates to sewage treatment technical field, specifically to active coke sewage advanced treatment device, aims at solving the problem of low regeneration efficiency and high operation cost in prior art. The device comprises a sewage treatment unit and an active coke recovery and regeneration device. The sewage treatment unit is provided with a main cavity, which is internally configured with a sieve plate, an active coke layer and a micro-sand layer. The first ultrasonic vibrator group is used to prevent the agglomeration of active coke and optimize the water flow distribution. The active coke recovery and regeneration device combines a cyclone separation device with a microwave irradiation regeneration unit. The microwave magnetron and the second ultrasonic vibrator group are used to realize efficient regeneration, significantly improve the recovery rate of iodine adsorption value and reduce the carbon loss rate. The whole device realizes the online recovery and regeneration of active coke under the condition of no shutdown, improves the sewage treatment efficiency and continuous operation capacity, reduces the operation cost, and has important application value and environmental protection significance.

A deamination tower system for semi-coke wastewater treatment comprises a deamination tower, a feeding area, a reaction area and a heating area are sequentially arranged in the deamination tower from top to bottom, a reboiler and a main steam inlet pipe are connected to the tower wall of the heating area of the deamination tower, a reboiler steam inlet pipe is connected to the reboiler, a side steam output pipe is arranged on the tower wall of the reaction area of the deamination tower, and the main steam inlet pipe is connected to the side steam output pipe. A pressure transmitter is arranged on the side wall of the heating area of the deamination tower and located above the reboiler, a pressure display alarm is arranged on the top of the deamination tower, and a flow display controller I and a flow control valve I are sequentially arranged on the side steam output pipe in the fluid flowing direction. And the pressure transmitter, the pressure display alarm, the flow display controller I and the flow control valve I are electrically connected. The problems that an existing deamination tower system cannot accurately monitor the pressure in the tower and lacks an alarm mechanism are solved, the pressure change in the tower can be accurately monitored in real time, the operation stability and safety of the deamination tower are improved, and the deamination effect is optimized.