CN114956428A - Desulfurization and denitrification acid-making wastewater treatment system and process thereof - Google Patents
Desulfurization and denitrification acid-making wastewater treatment system and process thereof Download PDFInfo
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- CN114956428A CN114956428A CN202210693827.XA CN202210693827A CN114956428A CN 114956428 A CN114956428 A CN 114956428A CN 202210693827 A CN202210693827 A CN 202210693827A CN 114956428 A CN114956428 A CN 114956428A
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F9/00—Multistage treatment of water, waste water or sewage
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
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Abstract
The invention discloses a desulfurization and denitrification acid-making wastewater treatment system and a process thereof, wherein the system comprises five reaction grids and two reagent grids; wherein the sodium hydroxide reagent chamber is connected to first reaction check, solid medicament chamber is connected to the second reaction check, first reagent check includes the lower chamber, the intermediate level chamber, the upper chamber, the space bar, the flexible baffle of first flexible baffle and second, the third reaction check passes through the third connecting tube and connects the fourth reaction check, the fifth reaction check includes the inner chamber, exocoel and side chamber, the side chamber is cyclic annular and sets up in the inner chamber bottom, the inner chamber is rotatable and set up in the exocoel and set up heating evaporation plant and be connected with the inert substance chamber that is used for providing inert substance to the fifth reaction check. According to the invention, the acid-making wastewater is subjected to step-by-step treatment, so that the purpose of each step is more definite, and the grid treatment can be used for carrying out the primary treatment of the next round of wastewater in the subsequent treatment process of the wastewater treated in the first round, so that the wastewater treatment efficiency is improved.
Description
Technical Field
The invention relates to the field of wastewater treatment, in particular to a desulfurization and denitrification acid-making wastewater treatment system and a process thereof.
Background
At present, most of SO2 and NOx emission comes from the ferrous metallurgy industry, NOx and SO2 in flue gas generated by a sintering and pelletizing process account for about 48 percent and 51 percent to 62 percent of total smelting emission, gases such as SO2 and NOx are emitted into the air, products such as nitrate, sulfate and secondary aerosol are generated through chemical reaction, PM is increased, and haze is easily formed.
In order to achieve the aim of ultralow emission of atmospheric pollutants in the steel industry, the sintering and pelletizing flue gas desulfurization and denitration of steel enterprises mostly adopt an activated carbon process, and flue gas of the activated carbon process is sent into an activated carbon adsorption tower through a booster fan. In which various pollutants such as SO2, NOX, Cl ", heavy metal ions, and excess ammonia injected for denitration are adsorbed by activated carbon. The active carbon with saturated adsorption enters an analytic tower for high-temperature analysis, SO2, HCl, ammonia and the like are released in a gaseous state, some heavy metals are brought out in a dust state together with analytic gas, and the analytic waste gas rich in SO2 is sent to an acid making working section to prepare sulfuric acid. In order to ensure the purity of the sulfuric acid, the waste gas is washed and purified by dilute sulfuric acid before acid preparation, NH3, HCl, heavy metal ions, dust suspended matters and part of SO2 in the waste gas are transferred into dilute acid, and the acid-containing waste water discharged from the purification section is the waste water to be treated in the desulfurization and denitrification process.
The sintering, pelletizing, desulfurization and denitrification acid-making wastewater has the characteristics of small water quantity, complex components, large water quality change and the like, so the treatment difficulty is higher. The method is characterized in that: the ammonia nitrogen concentration is high, biological denitrification (the salt content is too high, microorganisms cannot survive) cannot be adopted, and the problem of precipitation or scaling blockage exists when a gas stripping ammonia evaporation method or a deamination membrane method is adopted in part of domestic steel and iron plants at present. The concentration of sulfate radicals is high, and a large amount of calcium sulfate precipitates can be generated in the process of increasing the pH value by deamination, so that the stable operation of a system is influenced. High salt content, high chloride ion concentration and strong corrosivity to pipelines and equipment.
At present, part of iron and steel enterprises directly reuse the waste water for sintering and stirring, but ammonia escapes at high temperature in the stirring process, so that the waste water has a large smell and is in contact with the ammonia for a long time, and headache and dizziness are caused. The high-salt-content wastewater is used for sintering and stirring materials, which can cause the cyclic enrichment of salts in a system and cause corrosion to sintering equipment and a blast furnace.
Disclosure of Invention
The purpose of the invention is as follows:
in order to overcome the defects pointed out in the background art, namely to overcome the problem that the use of high-salt-content wastewater for sintering and stirring materials can cause salt to be circularly enriched in a system to corrode sintering equipment and a blast furnace, the invention provides a desulfurization and denitrification acid-making wastewater treatment system and a process thereof, which can effectively solve the problems related to the background art.
The technical scheme is as follows:
the invention provides a desulfurization and denitrification acid-making wastewater treatment system, which comprises: the reaction device comprises a first reaction cell, a second reaction cell, a third reaction cell, a first reagent cell, a fourth reaction cell, a second reagent cell and a fifth reaction cell; the first reaction grid is connected with a sodium hydroxide reagent cavity, the sodium hydroxide reagent cavity provides a sodium hydroxide solution for the first reaction grid, the sodium hydroxide solution is used for adjusting the pH value in the first reaction grid, the first reaction grid is connected with the second reaction grid through a first connecting pipeline, and the first connecting pipeline is provided with a first hydraulic pump; the second reaction grid is connected with a solid medicament cavity, the solid medicament cavity provides a solid medicament for the second reaction grid, the solid medicament is used for removing ammonium ions, the second reaction grid is connected with the third reaction grid through a second connecting pipeline, the second connecting pipeline is provided with a second hydraulic pump, and the bottom of the second reaction grid is provided with a precipitation pipeline; the first reagent grid comprises a lower layer cavity, a middle layer cavity, an upper layer cavity, a partition plate, a first telescopic partition plate and a second telescopic partition plate, the partition plate is horizontal and located in the middle layer cavity, the first telescopic plate is connected to the bottom surface of the partition plate, the second telescopic plate is connected to the top surface of the partition plate, the transverse width of the middle layer cavity is wider than that of the lower layer cavity and that of the upper layer cavity, and the longitudinal height of the middle layer cavity is higher than that of the lower layer cavity and that of the upper layer cavity, the first telescopic plate is connected with the bottom surface of the middle layer cavity, the second telescopic plate is connected with the top surface of the middle layer cavity, the lower layer cavity is communicated with the precipitation pipeline, and the upper layer cavity is communicated with the third reaction grid through a first reagent pipeline; the third reaction grid is connected with the fourth reaction grid through a third connecting pipeline, and the third connecting pipeline is provided with a third hydraulic pump; the fourth reaction grid is connected with a second reagent grid through a second reagent pipeline, the second reagent grid provides a reaction reagent for the fourth reaction grid, the fourth reaction grid is connected with the fifth reaction grid through a fourth connecting pipeline, and the fourth connecting pipeline is provided with a fourth hydraulic pump; the fifth reaction grid comprises an inner cavity, an outer cavity and a side cavity, the side cavity is annular and is arranged at the bottom end of the inner cavity, the side cavity is communicated with the inner cavity, the inner cavity is arranged in the outer cavity, the inner cavity is rotatable and is provided with a heating and evaporating device, and the inner cavity is connected with an inert substance cavity used for providing inert substances for the fifth reaction grid.
As a preferable mode of the present invention, an annular groove is disposed inside the third reaction cell, a deposition pipeline is disposed at the bottom of the third reaction cell, a plurality of stirring blades are disposed in the annular groove, the stirring blades slide in the annular groove to stir the solution in the third reaction cell, and the deposition pipeline is used for discharging the deposits in the third reaction cell.
As a preferable mode of the present invention, a space surrounded by the lower chamber, the partition plate, and the first expansion plate is referred to as a lower space, the lower space is filled with water, the water in the lower space extends to the sedimentation pipe, a space surrounded by the upper chamber, the partition plate, and the second expansion plate is referred to as an upper space, and the upper space is filled with a coagulation reagent.
As a preferable mode of the present invention, the second reagent pipeline is connected to the fifth reaction cell through an adapter pipeline, the second reagent pipeline is configured in an inverted U shape, the top end of the second reagent pipeline is connected to the adapter pipeline, two bottom ends of the second reagent pipeline are respectively connected to the fourth reaction cell and the second reagent cell, the second reagent cell is connected to a balance pipeline, and the balance pipeline is communicated with an inner space and an outer space of the second reagent cell; the diameter of the adapter tube portion connected to the second reagent tube is smaller than the diameter of the remaining portion of the adapter tube.
As a preferable mode of the present invention, a plurality of openings are provided on a bottom surface of the side cavity, a collection cavity is provided on a bottom of the outer cavity, an area of the collection cavity corresponding to the side cavity is open, the openings communicate with the collection cavity, the side cavity is configured to deposit an evaporation material, and the openings are configured to transfer the evaporation material to the collection cavity.
As a preferable mode of the present invention, the fifth reaction cell further includes a return pipe and a condensation pipe, the return pipe is connected to the condensation pipe and the inner cavity, the condensation pipe is transversely disposed below the joining pipe, one end of the condensation pipe is connected to the joining pipe, the other end of the condensation pipe is connected to the return pipe, the condensation pipe is further connected to the return pipe through a branch pipe, the diameter of the branch pipe is smaller than that of the return pipe, the branch pipe is always open, a pressure gate is disposed at a connection position of the return pipe and the condensation pipe, and the pressure gate controls opening and closing of the return pipe.
As a preferable mode of the present invention, the reagent kit further includes a plurality of second reagent cells and a plurality of second reagent tubes, and the second reagent cells are connected to one second reagent tube and the connecting tubes at the same time, respectively.
The invention also provides a treatment process of the wastewater from the acid production by desulfurization and denitrification, which comprises the following steps: s1: introducing wastewater into the first reaction grid, adding a sodium hydroxide solution to adjust the pH value to 9-11, and introducing the wastewater into the second reaction grid; s2: adding a magnesium chloride solid medicament into the second reaction grid to generate magnesium ammonium phosphate; s3: introducing the wastewater after the S2 reaction into the third reaction grid and discharging magnesium ammonium phosphate into the lower space of the first reagent grid; s4: the first reagent grid provides a coagulation reagent for the third reaction grid, and the third reaction grid performs coagulation reaction; s5: the third reaction grid introduces the wastewater after reaction into the fourth reaction grid and discharges the product of the coagulation reaction; s6: adding a sodium hydroxide solution, a calcium chloride solution and a coagulating reagent into the fourth reaction cell, and respectively carrying out corresponding reactions; s7: introducing wastewater in the fourth reaction chamber into the fifth reaction chamber and discharging residual substances in the fourth reaction chamber; s8: adding an inert substance into the fifth reaction grid, heating and evaporating, and rotating the inner cavity; s9: the opening discharges precipitated salt and inert substances, and the inner cavity discharges high-salinity wastewater; s10: mixing the products of coagulation reaction in S5 and S7 and the high-salinity wastewater in S9 for sintering.
As a preferred mode of the present invention, S8 includes the steps of: s81: adding an inert substance to the fifth reaction cell; s82: the inner cavity rotates to transfer inert substances into the side cavity; s83: stopping rotation and introducing wastewater; s84: heating to evaporate and rotate the inner cavity; s85: the rotation is stopped.
As a preferred embodiment of the present invention, the method further comprises the steps of: a1: the vapor evaporated in the fifth reaction cell enters the connecting pipeline; a2: the vapor flows through the adapter pipe and the second reagent pipe to generate a Bernoulli effect; a3: the liquid level of the reagent in the second reagent grid is raised and reaches the top end of the second reagent pipeline; a4: and the reagent in the second reagent pipeline flows into a fourth reaction chamber.
The invention realizes the following beneficial effects:
1. the acid making wastewater is treated by steps, so that the purpose of each step is more definite, the primary treatment of the next round of wastewater can be carried out immediately in the subsequent treatment process of the wastewater treated by the grid treatment, and the efficiency of wastewater treatment is greatly increased.
2. The content of substances such as water, metal ions and the like in the wastewater is relatively fixed every time of treatment, so that the relative amount of the solid medicament added is relatively fixed every time of wastewater treatment, the amount of the trisodium phosphate solid medicament and the amount of the magnesium chloride solid medicament can be further estimated by counting the total amount of the wastewater added into the first reaction grid, and the generated ammonium salt precipitate is relatively fixed, so that the input amount of a subsequent coagulant is also fixed, and the overall reaction is relatively stable.
3. The lateral conduit provides a small amount of water, condensation duct and backflow pipeline to the inner chamber all the time and can regularly provide quantitative water to the inner chamber for there is certain water yield all the time in the inner chamber, makes heating evaporation that carries on that the inner chamber can be stable, avoids the inner chamber to burn the heating empty.
4. The hair-dryer blows up the air current when fifth reaction check evaporate to can have sufficient air current to produce the bernoulli principle at the whole atmospheric pressure increase in-process of inner chamber and return line, thereby can make the liquid level lifting of the reagent in the second reagent pipeline according to the volume of the air current of evaporation plant evaporation vapor and hair-dryer, thereby can supply the deionization reagent to fourth reaction check, and can constantly provide the deionization reagent to fourth reaction check at the in-process that adds waste water to first reaction check continuously.
5. Through the action of the liquid level principle, the whole system can spontaneously supplement the reagent in the continuous process of the reaction.
6. Through deionization, remove the ammonium in the waste water for the ammonium generates magnesium ammonium phosphate and deposits, does not have the ammonia to the sintering process of the mixed product after the coagulation reaction at last, can not make the staff contact for a long time and produce the phenomenon of headache, dizziness.
7. Removing metal ions in the wastewater and heating to evaporate the high-salt wastewater so as to separate out salt from the high-salt wastewater, and isolating the salt and the fifth reaction grid through inert substances so as to avoid the cyclic enrichment of the salt in the system.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a desulfurization and denitrification acid-making wastewater treatment system provided by the invention;
FIG. 2 is a schematic diagram of a first reagent grid of a desulfurization, denitrification and acid production wastewater treatment system provided by the invention;
FIG. 3 is a schematic diagram of a fifth reaction grid of the desulfurization, denitrification and acid production wastewater treatment system provided by the invention;
FIG. 4 is a diagram of the working steps of a desulfurization and denitrification acid-making wastewater treatment process provided by the invention;
FIG. 5 is a diagram of the working steps of a fifth reaction cell of the desulfurization, denitrification and acid production wastewater treatment process provided by the invention;
FIG. 6 is a diagram of a second reagent grid of the desulfurization, denitrification and acid production wastewater treatment process provided by the invention;
FIG. 7 is a flow chart of the operation of a process for treating wastewater from desulfurization, denitrification and acid production according to the present invention;
wherein, 1-a first reaction lattice; 2-a second reaction grid; 3-a third reaction compartment; 4-fourth reaction compartment; 5-fifth reaction grid; 6-first reagent grid; 7-second reagent grid; 8-a first connecting conduit; 9-a second connecting conduit; 10-a third connecting conduit; 11-a fourth connecting conduit; 12-a settling pipe; 13 a first reagent conduit; 14-a second reagent conduit; 15-joining the pipes; 16-a spacer plate; 17-a first expansion plate; 18-a second expansion plate; 19-lumen; 20-side cavity.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In order to enable those skilled in the art to better understand the scheme of the present application, the present application will be described in further detail with reference to the accompanying drawings and the detailed description.
Example one
Refer to fig. 1-7. The embodiment provides a SOx/NOx control system acid wastewater treatment system includes: the reaction device comprises a first reaction chamber 1, a second reaction chamber 2, a third reaction chamber 3, a first reagent chamber 6, a fourth reaction chamber 4, a second reagent chamber 7 and a fifth reaction chamber 5.
This first reaction check 1 connects sodium hydroxide reagent chamber, and this sodium hydroxide reagent chamber provides the sodium hydroxide solution to this first reaction check 1, and this sodium hydroxide solution is used for adjusting the pH value in this first reaction check 1, and this first reaction check 1 connects this second reaction check 2 through first connecting tube 8, and this first connecting tube 8 sets up first hydraulic pump.
This second reaction check 2 connect solid medicament chamber, and this solid medicament chamber provides solid medicament to this second reaction check 2, and this solid medicament is used for cleaing away ammonium ion, and this second reaction check 2 connects this third reaction check 3 through second connecting tube 9, and this second connecting tube 9 sets up the second hydraulic pump, and 2 bottoms in this second reaction check set up precipitation pipeline 12.
This first reagent check 6 includes the lower floor chamber, the intermediate level chamber, the upper chamber, space bar 16, first flexible baffle and the flexible baffle of second, this space bar 16 level just is located this intermediate level chamber, this first expansion plate 17 is connected in this space bar 16 bottom surface, this second expansion plate 18 is connected in this space bar 16 top surface, the horizontal width in this intermediate level chamber is in the horizontal width in this lower floor chamber and this upper chamber, vertical height is higher than the vertical width in this lower floor chamber and this upper chamber, this intermediate level chamber bottom surface is connected to this first expansion plate 17, this intermediate level chamber top surface is connected to this second expansion plate 18, this lower floor chamber intercommunication should deposit pipeline 12, this upper chamber is through this third reaction check 3 of first reagent pipeline 13 intercommunication.
The third reaction cell 3 is connected with the fourth reaction cell 4 through a third connecting pipeline 10, and the third connecting pipeline 10 is provided with a third hydraulic pump; the fourth reaction cell 4 is connected with the second reagent cell 7 through a second reagent pipeline 14, the second reagent cell 7 provides a reaction reagent for the fourth reaction cell 4, the fourth reaction cell 4 is connected with the fifth reaction cell 5 through a fourth connecting pipeline 11, and the fourth connecting pipeline 11 is provided with a fourth hydraulic pump.
This fifth reaction check 5 includes inner chamber 19, exocoel and side chamber 20, and this side chamber 20 is cyclic annular and sets up in this inner chamber 19 bottom, and this side chamber 20 communicates with this inner chamber 19, and this inner chamber 19 sets up in this exocoel, and this inner chamber 19 is rotatable and is provided with heating evaporation plant, and this inner chamber 19 is connected with the inert substance chamber, and this inert substance chamber is used for providing inert substance to this fifth reaction check 5.
Preferably, in this embodiment, an annular groove is disposed inside the third reaction compartment 3, a deposition pipe is disposed at the bottom of the third reaction compartment, a plurality of stirring blades are disposed in the annular groove, the stirring blades slide in the annular groove to stir the solution in the third reaction compartment 3, and the deposition pipe is used for discharging the deposits in the third reaction compartment 3.
Preferably, in this embodiment, the space enclosed by the lower chamber, the partition plate 16 and the first expansion plate 17 is referred to as a lower space, the lower space is filled with water, the water in the lower space extends to the sedimentation pipe 12, the space enclosed by the upper chamber, the partition plate 16 and the second expansion plate 18 is referred to as an upper space, and the upper space is filled with a coagulation reagent.
In the specific implementation process, for the first reaction grid 1, when the connected sodium hydroxide reagent chamber provides the sodium hydroxide solution for the first reaction grid 1, a pH monitoring device may be disposed in the first reaction grid 1 to monitor the pH value, and when the pH value in the first reaction grid 1 reaches the pH value required for the reaction of the next wastewater, the connection between the sodium hydroxide reagent chamber and the first reaction grid 1 may be closed, so that the pH value in the first reaction grid 1 is determined, and a mixed solution for stirring the wastewater and the reagent in the first reaction grid 1 may be disposed in the first reaction grid 1, so that the mixed solution becomes more average.
In the second reaction grid 2, the solid medicament cavity is provided with a plurality of inner cavities 19, each inner cavity 19 is provided with different solid medicaments, such as trisodium phosphate solid medicament and magnesium chloride solid medicament, the trisodium phosphate solid medicament and the magnesium chloride solid medicament are added separately, after the trisodium phosphate solid medicament is added, the pH value of the mixed solution transferred from the first reaction grid 1 to the second reaction grid 2 cannot be changed too much due to the alkalinity of the trisodium phosphate, the mixed solution is still in alkalinity, for the wastewater, the component content of the wastewater in the region is in a relatively stable state for a long time, therefore, the relative amount of the added solid medicaments is relatively fixed every time of wastewater treatment, as long as the total amount of the wastewater added into the first reaction grid 1 is counted, the amount of the trisodium phosphate solid medicament and the magnesium chloride solid medicament can be further presumed, when a proper amount of trisodium phosphate solid medicament is added, a proper amount of magnesium chloride solid medicament is added again, ammonium ions in the wastewater in the second reaction grid 2 react with the trisodium phosphate solid medicament and the magnesium chloride solid medicament to generate ammonium salt precipitate, the ammonium salt can be regarded as a precipitate substance with magnesium ammonium phosphate as a main component, the magnesium ammonium phosphate is insoluble in water, a second hydraulic pump in a second connecting pipeline 9 connected with the second reaction grid 2 pumps the residual mixed solution after reaction into the third reaction grid 3, and after the mixed solution is pumped out, a precipitation pipeline 12 is opened to discharge the magnesium ammonium phosphate into the precipitation pipeline 12.
The sedimentation pipeline 12 is connected with the lower layer space of the first reagent grid 6, the lower layer space is filled with water, the water surface can rise after a certain amount of sedimentation substances are added into the water, as the sedimentation pipeline 12 is communicated with the lower layer space, and the coagulation reagent is added into the upper layer space arranged at the middle upper layer of the first reagent grid 6, under the normal environment, when the sedimentation pipeline 12 is added with the sedimentation substances, the liquid surface at one side of the sedimentation pipeline 12 can rise, therefore, after the second hydraulic pump extracts the residual waste water and the sedimentation substances enter the sedimentation pipeline 12, the second reaction grid 2 is sealed, the second reaction grid 2 is provided with a pressure change device and the pressure in the second reaction grid 2 is increased after the second reaction grid 2 is sealed, as the upper layer space and the lower layer space of the first reagent grid 6 are separated by the first expansion plate 17, the second expansion plate 18 and the spacing plate 16, therefore, after the water is influenced by the pressure, the liquid level in the first reagent grid 6 rises, the first telescopic shaft extends, the second telescopic shaft shortens, and the partition plate 16 rises, so that the coagulating reagent in the upper space rises, and the coagulating reagent enters the third reaction grid 3 from the first reagent pipeline 13; for the settling pipe 12, a liquid level detecting means for detecting the liquid level in the settling pipe 12 may be provided, and the pressure changing means stops increasing the pressure after the liquid level in the settling pipe 12 reaches the liquid level before the reaction starts.
The third reaction check 3 is adding the surplus waste water after the reaction of second reaction check 2 and thoughtlessly congeals the reagent after, the stirring piece slides along the ring channel in the ring channel, thereby stir third reaction check 3, thereby make surplus waste water and thoughtlessly congeal the reagent and can fully contact and fully take place the reaction, the remaining waste water suction fourth reaction check 4 after the third hydraulic pump of the third connecting tube 10 that third reaction check 3 connect reacts third reaction check 3, the remaining flocculation material of thoughtlessly congeal the reaction is from connecting the pipeline discharge that is used for discharging the flocculation material at third reaction check 3.
In the fourth reaction cell 4, sodium hydroxide is added to the remaining wastewater to adjust the pH to alkaline, and while adjusting the alkalinity, hydroxide ions and ions such as iron in the wastewater are precipitated to remove metal ions in the wastewater, and at the same time, a calcium chloride solution is added to form calcium fluoride precipitates with fluoride ions in the wastewater to remove fluoride ions in the wastewater.
Further, a fourth hydraulic pump in a fourth connecting pipe 11 connected to the fourth reaction chamber 4 pumps the remaining wastewater in the fourth reaction chamber 4 into the fifth reaction chamber 5.
In the fifth reaction cell 5, an inert substance chamber is filled with an inert substance such as a silicon substance into the inner chamber 19 and simultaneously rotated, and the inert substance is thrown into the side chamber 20 by centrifugal force during the rotation and covers the top, side and bottom surfaces of the side chamber 20; inner chamber 19 adds hydrochloric acid to in the waste water, adjust the pH value of waste water to neutral, and then form high salt waste water, and then the waste water of inner chamber 19 heating evaporation plant in to inner chamber 19 heats the evaporation, thereby make the moisture content in the waste water reduce gradually, thereby salt in making the waste water precipitate gradually, the time of heating the evaporation is more for a long time, the salt of precipitating is more, simultaneously, salt that precipitates at the rotatory in-process of inner chamber 19 is got rid of to side chamber 20 in, and covered inert, inert plays the effect of isolation salt and side chamber 20 body.
Example two
Refer to fig. 1-3. Preferably, in this embodiment, the second reagent pipeline 14 is connected to the fifth reaction cell 5 through an engaging pipeline 15, the second reagent pipeline 14 is configured in an inverted U shape, the top end of the second reagent pipeline 14 is connected to the engaging pipeline 15, two bottom ends of the second reagent pipeline 14 are respectively connected to the fourth reaction cell 4 and the second reagent cell 7, the second reagent cell 7 is connected to a balancing pipeline, and the balancing pipeline is communicated with an inner space and an outer space of the second reagent cell 7; the diameter of the portion of the adapter tube 15 connected to the second reagent tube 14 is smaller than the diameter of the remaining portion of the adapter tube 15.
Preferably, in this embodiment, the bottom surface of the side chamber 20 is provided with a plurality of openings, the bottom of the outer chamber is provided with a collection chamber, the area of the collection chamber corresponding to the side chamber 20 is open, the openings are communicated with the collection chamber, the side chamber 20 is used for depositing the evaporated substances, and the openings are used for transferring the evaporated substances to the collection chamber.
Preferably, in this embodiment, the fifth reaction cell 5 further includes a return pipe and a condensation pipe, the return pipe is connected to the condensation pipe and the inner cavity 19, the condensation pipe is transversely disposed below the connection pipe 15, one end of the condensation pipe is connected to the connection pipe 15, and one end of the condensation pipe is connected to the return pipe, the condensation pipe is further connected to the return pipe through a branch pipe, the diameter of the branch pipe is smaller than that of the return pipe, the branch pipe is always opened, a pressure gate is disposed at a connection position of the return pipe and the condensation pipe, and the pressure gate controls opening and closing of the return pipe.
Preferably, in this embodiment, the system includes a plurality of second reagent compartments 7 and a plurality of second reagent conduits 14, and the second reagent compartments 7 are respectively connected to one second reagent conduit 14 and are simultaneously connected to the connecting conduit 15.
In the specific implementation process, in the process of heating and evaporating, water vapor enters the connecting pipeline 15, a blower is arranged in the connecting pipeline 15 and blows air towards the direction of the second reagent pipeline 14, the diameter of the part of the connecting pipeline 15 connected to the second reagent pipeline 14 is smaller than that of the rest part of the connecting pipeline 15, so that the flow speed of the joint of the second reagent pipeline 14 is increased, the air pressure at the joint is reduced, the second reagent grid 7 is connected with the balance pipeline, the balance pipeline is communicated with the outside, and the communication part of the balance pipeline and the outside is subjected to atmospheric pressure; the air pressure at the two ends of the second reagent grid 7 is consistent with the atmospheric pressure in the initial state, and after the evaporation process is carried out for a period of time and the blower starts blowing, the air pressure at one end of the second reagent grid 7 is reduced and the air pressure at the other end is unchanged, so that the liquid level at the second reagent pipeline 14 is raised and the liquid level at the balance pipeline is lowered, and the second reagent pipeline 14 is arranged in an inverted U shape, so that the reagent liquid level in the second reagent grid 7 enters the second reagent pipeline 14 until the liquid level is raised to the top end of the inverted U shape, and falls into the second reagent pipeline 14 at the other end, so that the reagent in the second reagent grid 7 can enter the fourth reaction grid 4, and the reaction in the fourth reaction grid 4 can be carried out.
The collection chamber is open in the area corresponding to the side chamber 20, the opening communicating with the collection chamber, the side chamber 20 being for depositing the evaporated material and the opening being for transferring the evaporated material to the collection chamber. The system in this embodiment further comprises a plurality of second reagent compartments 7 and a plurality of second reagent conduits 14, wherein the second reagent compartments 7 are respectively connected to one second reagent conduit 14 and simultaneously connected to the adapter conduit 15.
For the fifth reaction grid 5, the reflux pipeline and the condensation pipeline, the condensation pipeline is communicated with the connecting pipeline 15, the water vapor part in the connecting pipeline 15 enters the condensation pipeline, and then the condensation pipeline cools the water vapor part into water and enters the connected reflux pipeline, the condensation pipeline is also connected with the reflux pipeline through a branch pipeline, the diameter of the branch pipeline is smaller than that of the reflux pipeline, the flow rate of the condensed water flowing into the condensation pipeline is larger than the speed of the water flowing into the branch pipeline in the condensation pipeline, so the condensed water can be accumulated in the condensation pipeline, the water flowing into the branch pipeline can directly flow into the reflux pipeline, a pressure door is arranged at the joint of the reflux pipeline and the condensation pipeline, the pressure door controls the opening and closing of the reflux pipeline, when the pressure of the water in the condensation pipeline is larger than the pressure threshold value of the pressure door, the pressure door of the condensation pipeline is opened, and the water in the condensation pipeline enters the reflux pipeline, the return line discharges the water into the interior 19 of the fifth reaction cell 5.
The branch pipeline provides a small amount of water, condensation pipeline and backflow pipeline to the inner cavity 19 all the time and can provide quantitative water to the inner cavity 19 regularly for there is certain water yield all the time in the inner cavity 19, makes the inner cavity 19 can be stable heat evaporation, avoids the heating of inner cavity 19 empty burning.
Further, for the fourth reaction cell 4 and the second reagent cell 7, a coagulation reagent is also provided in one of the second reagent cells 7, so that a coagulation reaction can also be performed in the fourth reaction cell 4.
EXAMPLE III
Refer to fig. 4-7. The embodiment provides a desulfurization and denitrification acid-making wastewater treatment process, which comprises the following steps:
s1: waste water is introduced into the first reaction chamber 1, sodium hydroxide solution is added to adjust the pH value to 9-11, and the waste water is introduced into the second reaction chamber 2.
S2: adding magnesium chloride solid medicament into the second reaction chamber 2 to generate magnesium ammonium phosphate.
S3: the wastewater after the reaction of S2 is introduced into the third reaction cell 3 and magnesium ammonium phosphate is discharged into the lower space of the first reagent cell 6.
S4: the first reagent compartment 6 provides a coagulation reagent to the third reaction compartment 3, and the third reaction compartment 3 performs a coagulation reaction.
S5: the third reaction chamber 3 introduces the waste water after reaction into the fourth reaction chamber 4 and discharges the product of the coagulation reaction.
S6: and adding a sodium hydroxide solution, a calcium chloride solution and a coagulating reagent into the fourth reaction cell 4 to perform corresponding reactions respectively.
S7: wastewater in the fourth reaction chamber 4 is introduced into the fifth reaction chamber 5 and the remaining substances in the fourth reaction chamber 4 are discharged.
S8: inert substances are added to the fifth reaction cell 5, and heating and evaporation are carried out and the inner cavity 19 is rotated.
S9: the opening discharges the precipitated salts and inert substances, and the inner chamber 19 discharges high-salinity wastewater.
S10: mixing the products of coagulation reaction in S5 and S7 and the high-salt wastewater in S9, and sintering.
Preferably, in this embodiment, S8 includes the following steps:
s81: to this fifth reaction cell 5 inert substances are added.
S82: the inner chamber 19 rotates to transfer the inert material into the side chamber 20.
S83: the rotation was stopped and wastewater was introduced.
S84: the heat evaporates and rotates the inner cavity 19.
S85: the rotation is stopped.
Preferably, in this embodiment, the method further includes the following steps:
a1: the vapor evaporated in the fifth reaction chamber 5 enters the connecting pipe 15.
A2: the flow of vapor through the adapter tube 15 and the second reagent tube 14 creates a bernoulli effect.
A3: the level of reagent in the second reagent compartment 7 rises and reaches the top of the second reagent conduit 14.
A4: the reagent in the second reagent conduit 14 flows into the fourth reaction compartment 4.
In the specific implementation process, when the pH value in the first reaction grid 1 reaches the pH value required by the current wastewater reaction, the connection between the sodium hydroxide reagent cavity and the first reaction grid 1 is closed, the mixed liquid of the wastewater and the reagent in the first reaction grid 1 is stirred, the mixed liquid becomes more average, and the wastewater with the adjusted pH value is pumped into the second reaction grid 2.
Adding trisodium phosphate solid medicament in an amount corresponding to the long-term stable wastewater to enable the mixed solution to be still in an alkaline state, further adding magnesium chloride solid medicament in an amount corresponding to the long-term stable wastewater, reacting ammonium ions in the wastewater in the second reaction grid 2 with the trisodium phosphate solid medicament and the magnesium chloride solid medicament to generate ammonium salt precipitate, wherein the ammonium salt is a precipitate substance with magnesium ammonium phosphate as a main component, the magnesium ammonium phosphate is insoluble in water, pumping the residual mixed solution after reaction into the third reaction grid 3 by a second hydraulic pump in a second connecting pipeline 9 connected with the second reaction grid 2, opening a precipitation pipeline 12 after pumping the mixed solution, and discharging the magnesium ammonium phosphate into the precipitation pipeline 12.
When the precipitation material with magnesium ammonium phosphate as the main component is added into the precipitation pipe 12, the liquid level at one side of the precipitation pipe 12 will rise, after the second hydraulic pump pumps out the remaining wastewater without ammonium ions and the precipitated substances enter the precipitation pipe 12, the second reaction chamber 2 is sealed, a pressure changing device is arranged in the second reaction chamber 2, the pressure in the second reaction chamber 2 is increased after the second reaction chamber 2 is sealed, since the upper and lower spaces of the first reagent chamber 6 are separated by the first and second stretching plates 17 and 18 and the partition plate 16, therefore, after the water is influenced by the pressure, the liquid level in the first reagent grid 6 rises, the first telescopic shaft extends, the second telescopic shaft shortens, the partition plate 16 rises, so that the coagulating agent in the upper space rises and the coagulating agent enters the third reaction cell 3 from the first agent pipe 13.
The stirring piece slides along the ring channel in the ring channel to stir third reaction check 3, thereby make remaining waste water and reagent of coagulating fully contact and fully take place the reaction, the third hydraulic pump of the third connecting tube 10 that third reaction check 3 are connected reacts remaining waste water suction fourth reaction check 4 after 3 reaction with third reaction check, the remaining flocculation material of reaction of coagulating is from connecting the pipeline discharge that is used for discharging the flocculation material at third reaction check 3.
Sodium hydroxide is added to the wastewater in the fourth reaction cell 4 to adjust the pH to be alkaline, and the specific pH is considered based on the average data of the long-term test results of local wastewater, wherein hydroxide ions and ions such as iron in the wastewater generate a metal compound precipitate to remove metal ions in the wastewater, and simultaneously, a calcium chloride solution is added to generate a calcium fluoride precipitate with fluoride ions in the wastewater to remove fluoride ions in the wastewater. Further, a fourth hydraulic pump in a fourth connecting pipe 11 connected to the fourth reaction chamber 4 pumps the remaining wastewater in the fourth reaction chamber 4 into the fifth reaction chamber 5.
Inert material chamber the inert material, such as silicon, is added to the inner chamber 19 and simultaneously rotated, the inert material being thrown into the side chamber 20 by centrifugal force during rotation and covering the top, side and bottom surfaces of the side chamber 20; inner chamber 19 adds hydrochloric acid to in the waste water, adjust the pH value of waste water to neutral, and then form high salt waste water, and then the waste water of inner chamber 19 heating evaporation plant in to inner chamber 19 heats the evaporation, thereby make the moisture content in the waste water reduce gradually, thereby salt in making the waste water precipitate gradually, the time of heating the evaporation is more for a long time, the salt of precipitating is more, simultaneously, salt that precipitates at the rotatory in-process of inner chamber 19 is got rid of to side chamber 20 in, and covered inert, inert plays the effect of isolation salt and side chamber 20 body.
For the fifth reaction cell 5, a telescopic partition plate is arranged at the joint of the inner cavity 19 and the side cavity 20, the inert substance cavity is connected to the side cavity 20, the rotation is stopped after the fifth reaction cell 5 rotates for a certain time, the partition plate partitions the inner cavity 19 and the side cavity 20, the opening is further opened, so that the inert substances and the precipitated salts in the side cavity 20 can fall into the collection cavity from the opening, the opening is closed at the moment, the inert substance cavity is opened, the inert substances in the inert substance cavity are introduced into the side cavity 20 by the inert substance cavity, the inert substance cavity is further closed, the fifth reaction cell restarts rotating, the inert substances are continuously thrown onto the side surface, the bottom surface and the top surface of the side cavity 20 by using centrifugal force, and the partition plate is further opened, so that the precipitated salts can be thrown into the side cavity by centrifugal action and cover the inert substances.
Furthermore, the products of the two flocculation reactions, the salt and the inert substances collected by the collection cavity and the silt mixed in the wastewater are sintered together, thereby completing the whole treatment process.
In the process of heating and evaporation, water vapor enters the connecting pipeline 15, a blower is arranged in the connecting pipeline 15 and blows air towards the direction of the second reagent pipeline 14, the diameter of the part, connected with the second reagent pipeline 14, of the connecting pipeline 15 is smaller than that of the rest part of the connecting pipeline 15, so that the flow speed of the connecting part of the second reagent pipeline 14 is increased, the air pressure of the connecting part is reduced, the second reagent grid 7 is connected with the balance pipeline, the balance pipeline is communicated with the outside, and the communicating part of the balance pipeline and the outside is subjected to atmospheric pressure; the air pressure at the two ends of the second reagent grid 7 is consistent with the atmospheric pressure in the initial state, and after the evaporation process is carried out for a period of time and the blower starts blowing, the air pressure at one end of the second reagent grid 7 is reduced and the air pressure at the other end is unchanged, so that the liquid level at the second reagent pipeline 14 is raised and the liquid level at the balance pipeline is lowered, and the second reagent pipeline 14 is arranged in an inverted U shape, so that the reagent liquid level in the second reagent grid 7 enters the second reagent pipeline 14 until the liquid level is raised to the top end of the inverted U shape, and falls into the second reagent pipeline 14 at the other end, so that the reagent in the second reagent grid 7 can enter the fourth reaction grid 4, and the reaction in the fourth reaction grid 4 can be carried out.
The desulfurization and denitrification acid-making wastewater treatment system and the process thereof provided by the application are introduced in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.
Claims (10)
1. The utility model provides a SOx/NOx control system sour effluent disposal system which characterized in that includes: the reaction device comprises a first reaction cell, a second reaction cell, a third reaction cell, a first reagent cell, a fourth reaction cell, a second reagent cell and a fifth reaction cell;
the first reaction grid is connected with a sodium hydroxide reagent cavity, the sodium hydroxide reagent cavity provides a sodium hydroxide solution for the first reaction grid, the sodium hydroxide solution is used for adjusting the pH value in the first reaction grid, the first reaction grid is connected with the second reaction grid through a first connecting pipeline, and the first connecting pipeline is provided with a first hydraulic pump;
the second reaction grid is connected with a solid medicament cavity, the solid medicament cavity provides a solid medicament for the second reaction grid, the solid medicament is used for removing ammonium ions, the second reaction grid is connected with the third reaction grid through a second connecting pipeline, the second connecting pipeline is provided with a second hydraulic pump, and the bottom of the second reaction grid is provided with a precipitation pipeline;
the first reagent grid comprises a lower layer cavity, a middle layer cavity, an upper layer cavity, a partition plate, a first telescopic partition plate and a second telescopic partition plate, the partition plate is horizontal and located in the middle layer cavity, the first telescopic plate is connected to the bottom surface of the partition plate, the second telescopic plate is connected to the top surface of the partition plate, the transverse width of the middle layer cavity is wider than that of the lower layer cavity and that of the upper layer cavity, and the longitudinal height of the middle layer cavity is higher than that of the lower layer cavity and that of the upper layer cavity, the first telescopic plate is connected with the bottom surface of the middle layer cavity, the second telescopic plate is connected with the top surface of the middle layer cavity, the lower layer cavity is communicated with the precipitation pipeline, and the upper layer cavity is communicated with the third reaction grid through a first reagent pipeline;
the third reaction grid is connected with the fourth reaction grid through a third connecting pipeline, and the third connecting pipeline is provided with a third hydraulic pump; the fourth reaction grid is connected with a second reagent grid through a second reagent pipeline, the second reagent grid provides a reaction reagent for the fourth reaction grid, the fourth reaction grid is connected with the fifth reaction grid through a fourth connecting pipeline, and the fourth connecting pipeline is provided with a fourth hydraulic pump;
the fifth reaction grid comprises an inner cavity, an outer cavity and a side cavity, the side cavity is annular and is arranged at the bottom end of the inner cavity, the side cavity is communicated with the inner cavity, the inner cavity is arranged in the outer cavity, the inner cavity is rotatable and is provided with a heating and evaporating device, and the inner cavity is connected with an inert substance cavity used for providing inert substances for the fifth reaction grid.
2. The wastewater treatment system according to claim 1, wherein an annular groove is formed inside the third reaction cell, a deposition pipe is formed at the bottom of the third reaction cell, a plurality of stirring sheets are arranged in the annular groove, the stirring sheets slide in the annular groove to stir the solution in the third reaction cell, and the deposition pipe is used for discharging the deposits in the third reaction cell.
3. The wastewater treatment system according to claim 2, wherein the space surrounded by the lower chamber, the partition plate and the first expansion plate is referred to as a lower space, the lower space is filled with water, the water in the lower space extends to the sedimentation pipe, the space surrounded by the upper chamber, the partition plate and the second expansion plate is referred to as an upper space, and the upper space is filled with a coagulation reagent.
4. The desulfurization and denitrification acid-making wastewater treatment system according to claim 3, wherein the second reagent pipeline is connected with the fifth reaction cell through a connecting pipeline, the second reagent pipeline is arranged in an inverted U shape, the top end of the second reagent pipeline is connected with the connecting pipeline, two bottom ends of the second reagent pipeline are respectively connected with the fourth reaction cell and the second reagent cell, the second reagent cell is connected with a balance pipeline, and the balance pipeline is communicated with the inner space and the outer space of the second reagent cell; the diameter of the adapter tube portion connected to the second reagent tube is smaller than the diameter of the remaining portion of the adapter tube.
5. The desulfurization and denitrification acid-making wastewater treatment system according to claim 4, wherein a plurality of openings are formed in the bottom surface of the side cavity, a collection cavity is formed in the bottom of the outer cavity, the collection cavity is opened in an area corresponding to the side cavity, the openings are communicated with the collection cavity, the side cavity is used for depositing evaporated substances, and the openings are used for transferring the evaporated substances to the collection cavity.
6. The desulfurization, denitrification and acid-making wastewater treatment system according to claim 5, wherein the fifth reaction cell further comprises a return pipe and a condensation pipe, the return pipe is connected with the condensation pipe and the inner cavity, the condensation pipe is transversely arranged below the connecting pipe, one end of the condensation pipe is connected with the connecting pipe, the other end of the condensation pipe is connected with the return pipe, the condensation pipe is further connected with the return pipe through a branch pipe, the diameter of the branch pipe is smaller than that of the return pipe, the branch pipe is always open, a pressure door is arranged at the joint of the return pipe and the condensation pipe, and the pressure door controls the opening and closing of the return pipe.
7. The desulfurization and denitrification acid-making wastewater treatment system according to claim 6, further comprising a plurality of second reagent grids and a plurality of second reagent pipes, wherein the second reagent grids are respectively connected with one second reagent pipe and are simultaneously connected with the connecting pipe.
8. The desulfurization and denitrification acid-making wastewater treatment process adopts the desulfurization and denitrification acid-making wastewater treatment system of claim 7, and is characterized by comprising the following steps of:
s1: introducing wastewater into the first reaction grid, adding a sodium hydroxide solution to adjust the pH value to 9-11, and introducing the wastewater into the second reaction grid;
s2: adding a magnesium chloride solid medicament into the second reaction grid to generate magnesium ammonium phosphate;
s3: introducing the wastewater after the S2 reaction into the third reaction grid and discharging magnesium ammonium phosphate into the lower space of the first reagent grid;
s4: the first reagent grid provides a coagulation reagent for the third reaction grid, and the third reaction grid performs coagulation reaction;
s5: the third reaction grid introduces the wastewater after reaction into the fourth reaction grid and discharges the product of the coagulation reaction;
s6: adding a sodium hydroxide solution, a calcium chloride solution and a coagulating reagent into the fourth reaction cell, and respectively carrying out corresponding reactions;
s7: introducing wastewater in the fourth reaction chamber into the fifth reaction chamber and discharging residual substances in the fourth reaction chamber;
s8: adding an inert substance into the fifth reaction grid, heating and evaporating, and rotating the inner cavity;
s9: the opening discharges precipitated salt and inert substances, and the inner cavity discharges high-salinity wastewater;
s10: mixing the products of coagulation reaction in S5 and S7 and the high-salinity wastewater in S9 for sintering.
9. The desulfurization and denitrification acid-making wastewater treatment process according to claim 8, wherein the S8 comprises the following steps:
s81: adding an inert substance to the fifth reaction cell;
s82: the inner cavity rotates to transfer inert substances into the side cavity;
s83: stopping rotation and introducing wastewater;
s84: heating to evaporate and rotate the inner cavity;
s85: the rotation is stopped.
10. The desulfurization and denitrification acid-making wastewater treatment process according to claim 9, further comprising the steps of:
a1: the vapor evaporated in the fifth reaction cell enters the connecting pipeline;
a2: the vapor flows through the adapter pipe and the second reagent pipe to generate a Bernoulli effect;
a3: the liquid level of the reagent in the second reagent grid is raised and reaches the top end of the second reagent pipeline;
a4: and the reagent in the second reagent pipeline flows into a fourth reaction chamber.
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| RU2222366C2 (en) * | 2002-04-05 | 2004-01-27 | Черных Виталий Петрович | Evaporating device |
| CN203886560U (en) * | 2013-11-27 | 2014-10-22 | 深圳市道汇科技有限公司 | Automatic chemical reagent feeding device |
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- 2022-06-20 CN CN202210693827.XA patent/CN114956428A/en not_active Withdrawn
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| RU2222366C2 (en) * | 2002-04-05 | 2004-01-27 | Черных Виталий Петрович | Evaporating device |
| CN203886560U (en) * | 2013-11-27 | 2014-10-22 | 深圳市道汇科技有限公司 | Automatic chemical reagent feeding device |
| CN110721625A (en) * | 2019-10-15 | 2020-01-24 | 威尚生物技术（合肥）有限公司 | A equipment for reagent draws |
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| CN113087266A (en) * | 2021-04-30 | 2021-07-09 | 北京首钢国际工程技术有限公司 | Control method suitable for zero discharge of sintering pellet desulfurization and denitrification acid making wastewater |
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