CN106186451A

CN106186451A - A kind of processing system containing heavy metal metallurgy waste water

Info

Publication number: CN106186451A
Application number: CN201610812729.8A
Authority: CN
Inventors: 卢晔
Original assignee: Chengdu Jiushidu Industrial Product Design Co Ltd
Current assignee: Chengdu Jiushidu Industrial Product Design Co Ltd
Priority date: 2016-09-09
Filing date: 2016-09-09
Publication date: 2016-12-07

Abstract

The invention discloses a kind of processing system containing heavy metal metallurgy waste water, including: for the raw material reaction device gathered materials, ozone reaction still for oxidation reaction, precipitation still for coagulating sedimentation, material outlet connects waste water inlet by sewage pump, air vent connects air inlet pipe, charging aperture connects clear liquid pipe, mixed gas outlet connects air inlet pipe, ozone inlet tube connects ozonator, precipitum outlet connects feed pipe, scavenging solution outlet connects cooler, wastewater outlet connects feed pipe, blow-off pipe connects pressure filter by blowoff line, exhaustor connects blowoff line by axial fan.The processing system containing heavy metal metallurgy waste water of the present invention is small, floor space is little, equipment needed thereby negligible amounts, not using expensive equipment and consumptive material, investment and operating cost are low, and energy consumption is less, while processing waste water, waste gas can also be processed, obvious processing effect, continuous treatment can be realized.

Description

A kind of processing system containing heavy metal metallurgy waste water

Technical field

The present invention relates to smelting wastewater processing technology field, particularly to a kind of process system containing heavy metal metallurgy waste water System.

Background technology

Smelting wastewater is broadly divided into blast furnace gas waste water and steel-making ironmaking waste water, and BF Gas Washing water mainly contains more Sulfide and carbide, general soften carbonizatin method PROCESS FOR TREATMENT by Calx, steel-making ironmaking waste water is mainly hot rolling and cold Roll waste water, the most often containing substantial amounts of heavy metal and iron ion in waste water, particularly during the color steel of rolling, its chromium contained, zinc, The heavy metal amounts such as manganese are higher.Processing method currently for this type of waste water typically uses neutralisation treatment method, chemical method or membrance separation Method, the advantages such as wherein due to neutralisation treatment method low cost, technique is simple, and effect is notable and be generally used.

But, along with country implemented big underproduction policy in recent years, steel-making industry and relevant industries thereof have been carried out tightened up Requirement, more and more higher to the standard performed by its " three wastes " discharged, the technique of existing use is far from reaching state's domestic discipline and family rules Fixed requirement, it is therefore desirable to improved containing heavy metal metallurgy waste water treatment process and system existing, makes enterprise connecing Under the cost being subject to, the waste water of discharge is made to reach the requirement of national regulation.

Meanwhile, in the existing system processed for smelting wastewater and technique, do not have at the waste gas that waste water is produced Reason, thus results in the unpleasant (H mainly produced after sulfuric acid decomposition of effluent treatment plant often stink₂S gas), equipment pipe is rotten Erosion is serious, usually gives people filthy impression, and meanwhile, the workman in waste water workshop the most usually suffers from respiratory tract disease, therefore, has The necessary waste gas to producing processes.

Summary of the invention

The goal of the invention of the present invention is: for the problem of above-mentioned existence, it is provided that a kind of place containing heavy metal metallurgy waste water Reason system, with the problem solving above-mentioned existence.

The technical solution used in the present invention is as follows: a kind of processing system containing heavy metal metallurgy waste water, including:

For the raw material reaction device gathered materials, raw material reaction device includes material inlet, material outlet and air vent；

For the ozone reaction still of oxidation reaction, ozone reaction still includes the heat exchange coil being coiled on ozone reaction still, is located at Charging aperture, mixed gas outlet, ozone inlet tube, precipitum outlet and scavenging solution outlet, heat exchange on ozone reaction still Coil pipe one end is provided with waste water inlet, and the other end is provided with wastewater outlet；

For the precipitation still of coagulating sedimentation, precipitation still includes exhaustor, air inlet pipe, blow-off pipe, clear liquid pipe, charging Pipe；

Material outlet connects waste water inlet by sewage pump, and air vent connects air inlet pipe, and charging aperture connects clear liquid pipe, mixed gas Outlet connects air inlet pipe, and ozone inlet tube connects ozonator, and precipitum outlet connects feed pipe, and scavenging solution outlet is even Connecing cooler, wastewater outlet connects feed pipe, and blow-off pipe connects pressure filter by blowoff line, and exhaustor passes through axial fan Connect blowoff line.

For further purified treatment, cooler connects continuous drift sand filter tank.

Further, in order to prevent pipeline overload and improve adaptability, it is provided with opening and closing valve at scavenging solution outlet and connects Having reflux pipe, also be provided with opening and closing valve at the arrival end of cooler, one end of reflux pipe is connected at scavenging solution outlet Opening and closing valve and cooler arrival end at opening and closing valve between, the other end of reflux pipe connects the port of export of cooler And it is provided with stop valve.

Further, reflux pipe being additionally provided with pressure relief valve, pressure relief valve's pressure in reflux pipe is in rule It is automatically releasable time more than fixed pressure.

In order to process the filtrate that Filter Press produces further, the filtrate (liquid end of pressure filter connects feed pipe.

Further, for the more preferable waste gas that must process, precipitation still includes cavity, and the purification that is arranged over of inside cavity fills Putting, purifier is fixedly installed between feed pipe and exhaustor, and purifier includes shutter board and labyrinth type swash plate, shutter board It is located at the top of labyrinth type swash plate.

Further, blow-off pipe and air inlet pipe are located on the low head of cavity lower end, and the bottom of cavity is provided with boiling device, institute Stating boiling device and include boiling plate, boiling plate is evenly equipped with some pores, the middle part perforate of boiling plate is also connected with blow-off pipe, chamber Body discharges material by blow-off pipe, and boiling plate, blow-off pipe and low head are formed to seal against each other to connect and form gas distributing chamber, Gas is passed through in gas distributing chamber by air inlet pipe.

In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:

1, the use of ozone is not primarily to be easily formed the lower valency metal ion of precipitation in oxidized waste water, makes lower valency metal Ion becomes feasible to be formed the high-valence state metal ion of precipitation, removes the metal ion dissolved in waste water further；Meanwhile, pass through Utilize unreacted ozone to process waste gas, make the waste gas produced in each equipment can obtain abundant deodorization and process, make discharge Waste gas nuisance and corrosive substance content few, improve the working environment of workman and the working environment of equipment pipe；Separately Outward, while waste gas is processed, utilize waste gas that the blow-off line being susceptible to blocking is purged, pump pressure is being provided While power, less scaling and block in making pipeline, it is ensured that system properly functioning；

2, by making full use of the preheating in waste water, in making clear liquid, suspension colloidal solid collision probability improves, and promotes bulk group Shape colloid is formed, and coordinates the effect of activated silicic acid flocculation aid, contributes to the separation of later stage solid-liquid, improve clean-up effect；

3, the precipitum by utilizing secondary precipitation process to produce is used as sedimentation agent, is occurring with various heavy metal hydroxides While co-precipitation, hydroxide ion free in precipitum is fully used, and decreases the additives such as flocculant Usage amount, meanwhile, the backflow of precipitum can make sewage sludge coarse grain, has made on mud band different electric charges, has accelerated mud Sedimentation and the speed of separation, sedimentation effect is notable；

4, the setting of reflux pipe is possible to prevent loine pressure overload to break down, when the parameters of scavenging solution has reached pre- During provisioning request, then need not again it be carried out cooling process, continuous drift sand filter tank can be fed directly to via reflux pipe, with suitable Adjust system to answering property, economize on resources；

5, the processing system containing heavy metal metallurgy waste water of the present invention is small, and floor space is little, equipment needed thereby negligible amounts, Not using expensive equipment and consumptive material, investment and operating cost are low, and energy consumption is less, while processing waste water, moreover it is possible to enter waste gas Row processes, and obvious processing effect, function is abundanter, can realize continuous treatment, and feasibility is good.

Accompanying drawing explanation

Fig. 1 is a kind of precipitation still structural representation of the present invention；

Fig. 2 is the structural representation of Section A-A in Fig. 1；

Fig. 3 is the purifier structural representation of the precipitation still of the present invention；

Fig. 4 is the partial enlarged drawing of part B in Fig. 3；

Fig. 5 is boiling plate and the gas distributing chamber structural representation of the precipitation still of the present invention；

Fig. 6 is the plan structure schematic diagram of the another kind of situation of the gas distributing chamber of the present invention；

Fig. 7 is the structural representation top view during aperture opening and closing device closedown of the present invention；

Fig. 8 is the opening structural representation of aperture opening and closing device；

Fig. 9 is a kind of processing system structural representation containing heavy metal metallurgy waste water of the present invention；

Figure 10 is the structural representation of the raw material reaction device that the present invention uses；

Figure 11 is the structural representation of the ozone reaction still that the present invention uses；

Figure 12 is the reflux pipe structural representation of the present invention；

Figure 13 is the process chart containing heavy metal metallurgy Waste Water Treatment of the present invention.

Labelling in figure: 1 is precipitation still, and 101 is cavity, and 102 is upper cover, and 1021 is exhaustor, and 103 is lower envelope Head, 1031 is air inlet pipe, and 1032 is blow-off pipe, and 104 is filling pipe, and 105 is clear liquid pipe, and 106 is feed pipe, and 107 for purifying dress Putting, 1071 is shutter board, and 1072 is labyrinth type swash plate, and 1073 is slanting baffle, and 1074 is perpendicular baffle plate, and 1075 is through hole, and 108 are Boiling plate, 1081 is pore, and 1082 is little boiling plate, and 109 is gas distributing chamber, and 1091 for sealing dividing plate, and 1092 is little gas Distributing chamber, 110 is aperture opening and closing device, 1101 aperture opening and closing disc, and 1102 is support ring, and 1103 is fan blades, and 1104 is pull bar, 2 For raw material reaction device, 201 is material inlet, and 202 is material outlet, and 203 is air vent, and 204 is additive import, and 3 is ozone Reactor, 301 is heat exchange coil, and 3011 is waste water inlet, and 3012 is wastewater outlet, and 302 is charging aperture, and 303 enter for reactant Mouth pipe, 304 is mixed gas outlet, and 305 is ozone inlet tube, and 306 is precipitum outlet, and 307 is scavenging solution outlet, 4 For axial fan, 5 is pressure filter, and 6 is sewage pump, and 7 is cooler, and 8 is continuous drift sand filter tank, and 9 is ozonator, and 10 are Reflux pipe, 1001 is stop valve, and 1002 is pressure relief valve, and 11 is opening and closing valve.

Detailed description of the invention

Below in conjunction with the accompanying drawings, the present invention is described in detail.

In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and It is not used in the restriction present invention.

As shown in Figure 1 to Figure 3, a kind of precipitation still 1 containing heavy metal metallurgy waste water, including cavity 101, cavity 101 Upper end is sealedly connected with the upper cover 102 with exhaustor 1021, and cavity 101 lower end is tightly connected with air inlet pipe 1031 and row The low head 103 of dirty pipe 1032, the top of cavity 101 side is provided with filling pipe 104, and the top of the opposite side of cavity 101 is provided with Clear liquid pipe 105, on the middle and upper part of cavity 101, is evenly equipped with several feed pipes 106, and feed pipe 106 uses tangential oblique cutting tubular type to tie Structure；In cavity 101, the top of cavity 101 is provided with purifier 107.

As a kind of embodiment, the bottom of cavity is provided with boiling device, and described boiling device includes boiling plate 108, boiling Rising the middle part perforate of plate 108 and connect blow-off pipe 1032, cavity discharges material by blow-off pipe, so that mud flows into blowdown In pipe 1032, boiling plate 108, blow-off pipe 1032 and low head 103 are formed to seal against each other to connect and form gas distributing chamber 109, enter Gas is passed through in gas distributing chamber 109 by trachea 1031.

Being preferably carried out mode as one, feed pipe 106 is towards cavity 101 lower tangential oblique cutting, the inclination of its horizontal plane Angle is 5 °-15 °, preferably 7 °, the most also may select 0 ° or 15 °.By centrifugal rotation and the acceleration down that gives, useless Water preferably can rotate along cavity 101 and flow into cavity 101 bottom, and then adds waste water spreading area in cavity 101, Be beneficial to the later stage process, the most also greatly reduce the waste water impact to cavity 101, eliminate waste water enter cavity time everywhere Sputter and pollute the phenomenon within cavity 101, it is achieved that steadily feeding, precipitation still 1 swings little, it is ensured that process safety.

Furthermore, purifier 107 includes shutter board 1071 and labyrinth type swash plate 1072, such as Fig. 3 and Fig. 4 institute Show, filling pipe 104, clear liquid pipe 105 and feed pipe 106 below shutter board 1071, shutter board 1071 to be arranged above labyrinth type oblique Plate 1072, shutter board 1071 is used for by gas and stops non-gaseous material simultaneously.

As entering a kind of embodiment, as shown in Figure 3 and Figure 4, labyrinth type swash plate 1072 includes L-type baffle plate, L-type baffle plate by Slanting baffle 1073 and perpendicular baffle plate 1074 form, and slanting baffle 1073 and perpendicular baffle plate 1074 are crossed to form L-shaped, and its angle intersected is can With between 30 °-150 °, preferably 60 ° or 120 °, slanting baffle 1073 and perpendicular baffle plate 1074 can be divided into two parts and be formed L-type baffle plate, it is also possible to be certainly formed as one L-type baffle plate, L-type baffle plate tilts to be fixedly mounted in cavity 101 the most successively, To form labyrinth type swash plate 1072.

As entering a kind of preferred implementation, the slanting baffle 1073 of the perpendicular baffle plate 1074 of L-type baffle plate and adjacent L-type baffle plate Spacing is 5-20mm, preferably 8mm.Perpendicular baffle plate 1074 is provided with some through holes 1075, and the percent opening of perpendicular baffle plate is 50-80%, excellent Elect 65% as, in order to gas to cavity 101 upper flow, ensures that perpendicular baffle plate has certain intensity by through hole simultaneously.

As it is shown in figure 1, purifier 107 be arranged above exhaustor 1021, exhaustor 1021 by axial fan 4 by chamber Gas in body 101 is discharged outside cavity 101.Purifier 107 is the time of staying of mixed gas in extending cavity 101, Enable the ozone reacted the most completely to react for a long time with waste gas, eliminate the H in waste gas₂S and N_XO, to reach deodorization purpose, with Time, make ozone be fully used.

More specifically, in purifier 107 1 aspect can make expellant gas, non-gaseous material content is few, the opposing party Face, the foul smell making waste water produce and the ozone reacted the most completely are mixed to be sufficiently mixed, and extends its time of staying, in course of reaction In, sulfate precipitation and the non-gaseous material obtained by gear of generation go downstream along slanting baffle 1073, finally through shutter board 1071 Fall in cavity 101.

As shown in Figure 5 and Figure 6, boiling plate 108 is evenly equipped with some pores 1081, in pore 1081, is provided with pour mask, in case Only waste water flows backward in gas distributing chamber 109, and the cross section of boiling plate 108 can be straight line, it is also possible to for concave, it is preferable that The section of boiling plate 108 is the camber line towards cavity 101 lower knuckle, so that waste water or mud on boiling plate 108 come together in The top of blow-off pipe 1032, in order to preferably blowdown.

It is passed through ozone gas to gas distributing chamber 109, when the pressure in gas distributing chamber 109 reaches by air inlet pipe 1031 After certain value, spraying in cavity 101 by the pore 1081 on boiling plate 108, waste water or mud on boiling plate 108 are spraying Gas effect under, rapidly " boiling " (so-called boiling, actually for a kind of phenomenon that steams in a large number in liquid, and and non-traditional Make, by high-temperature heating, the boiling that liquid produces in meaning), a large amount of bubbles occur, with centrifugal rotation, bubble dish in waste water Screw on liter, make the waste water in precipitation still 1 that fierce stirring to occur, make the concentration of waste water be more evenly distributed, and without again to useless Water carries out mechanical agitation, eliminates mechanical stirring device, simplify the frame for movement of precipitation still 1, it is to avoid mechanical agitation The various problems that device brings, the adaptability making precipitation still 1 is higher.Meanwhile, in the bubble that helical disk rises, in bubble Gas is fully contacted with waste water, increases the contact area of ozone and waste water and extends time of contact, waste water and ozone Reaction is more abundant, improves the utilization rate of ozone.

As a kind of improvement project, gas distributing chamber 109 can by seal dividing plate 1091 be mutually divided into multiple mutually The least gas distributing chamber 1092, as shown in Figure 6, not exchanges information between adjacent little gas distributing chamber 1092, each little gas Distributing chamber 1092 is at least connected with an air inlet pipe 1031, by gas distributing chamber 109 is divided into multiple little gas distributing chamber 1092, can arbitrarily adjust the tolerance size in each region on boiling plate 108, make the waste water on boiling plate 108 or mud as required Uniformly " seethe with excitement ", not enough or too much with the tolerance preventing certain region in cavity 101, make ozone contact with waste water or mud and more fill Point, contactless blind area or contact not foot phenomenon exist, improve reaction efficiency.As preferably, gas distributing chamber 109 can by seal every Plate 1091 is divided into 6 independent little gas distributing chamber 1092, and each little gas distributing chamber 1092 connects an air inlet pipe 1031, To better control over the tolerance size in each region on boiling plate 108, so that gas is carried out more effectively with the waste water in cavity 101 Uniformly mix contact, make that reaction carries out is more abundant.

In above-mentioned, the setting of little gas distributing chamber 1092 can also solve putty and the problem of waste water mixing inequality in time, i.e. When on boiling plate 108, multiple pores 1081 in certain pore 1081 or certain region occur blocking, only need to be somebody's turn to do by strengthening The ventilation of pore 1081 the least gas distributing chamber 1092 makes pore 1081 the most unobstructed, compared to only one of which gas The structure of distributing chamber 109, it is not necessary to increase the ventilation of whole gas distributing chamber 109, decreases the ventilation solved needed for this problem Amount, pressurization time is short, and reacting treatment time is fast, it is to avoid adding the adverse effect caused in cavity 101 of overall ventilation (excessive " boiling " is easily caused waste water or mud splashes, and purifier is vulnerable to contaminated wastewater)；When waste water is rotating mixing During, when in cavity 101, there is mixing inequality and windrow problem in the waste water in certain region, only need to be by increasing this region institute The ventilation of corresponding little gas distributing chamber 1092 just can solve this problem, makes ozone and waste water hybrid reaction more abundant, improves The conformability of precipitation still 1.

As improvement project further, boiling plate 108 also can be divided into multiple little boiling plate 1082, adjacent little boiling plate It is tightly connected between 1082, or the quantity also dependent on gas distributing chamber 109 is divided into the least boiling plate 1082, The corresponding Ge little gas distributing chamber 1092 of the most each little boiling plate 1082, as shown in Figure 6, seals seamless between little boiling plate 1082 Connect, to prevent waste water and mud leakage.After boiling plate 108 modularity, the installation and removal of boiling plate 108 both it were easy to, again Be easy to the cleaned and changed of boiling plate 108, when boiling plate 108 occurs that blocking or dirt need to pull down solution, only need to pull down by Blocking or occupy the little boiling plate 1082 of dirt, it is to avoid directly pull down the trouble of boiling plate 108.

Improve embodiment as one, be provided with aperture opening and closing device 110 in gas distributing chamber 109, such as Fig. 5 to Fig. 8 institute Showing, aperture opening and closing device 110 includes the aperture opening and closing disc 1101 for opening and closing blow-off pipe 1032 being located in blow-off pipe 1032, if The support ring 1102 for supporting aperture opening and closing disc 1101 outside blow-off pipe 1032, to realize better controling over blow-off pipe 1032 Open and close controlling.

Improving embodiment as one, aperture opening and closing disc 1101 is made up of multiple fan blades 1103 divided equally, and preferably 5 Individual, fan blades 1103 is rotatably connected in support ring 1102 by pull bar 1104, and aperture opening and closing disc 1101 is for blow-off pipe 1032 Open and close controlling, support ring 1102 is rotatably connected on low head 103, when support ring 1102 rotates in one direction, fan blades 1103 open, and blow-off pipe 1032 turns on, and waste water and mud in cavity 101 discharge precipitation still 101 by blow-off pipe 1032 Outward, otherwise, when support ring 1102 is turned round in the opposite direction, fan blades 1103 is closed, and blow-off pipe 1032 is obstructed.Open by arranging aperture Closing device 110, compared to expensive electronic valve, structural principle is simple, and easy installing/dismounting is easy to clean, it is easy to control, It is not susceptible to fault, is highly suitable in precipitation still 1.

Furthermore, present invention additionally comprises a kind of processing system containing heavy metal metallurgy waste water, such as Fig. 9 to Figure 12 institute Showing, it includes:

For the raw material reaction device 2 gathered materials, raw material reaction device 2 includes material inlet 201, material outlet 202, air vent 203 and Additive import 204, material inlet 201 is for receiving from smelting wastewater (the predominantly continuous casting work containing heavy metal just produced The a large amount of cooling waste waters produced in skill), material outlet 202 is connected with the input of sewage pump 6, sends outside realizing raw material, interpolation Thing import 204 is for adding bean milk in raw material reaction device 2, and air vent 203 is connected with the air inlet pipe 1021 of precipitation still 1, Waste gas in discharging raw material reaction device 2；More specifically, raw material reaction device 2 is additionally provided with manhole and temperature gauge (figure In all do not mark), manhole, for observing pan feeding situation and the response situation of smelting wastewater in raw material reaction device 2, simultaneously facilitates former Material reactor early stage and the clean and maintenance in later stage, temperature gauge, for measuring the temperature of smelting wastewater, is smelted with real-time monitoring The temperature of waste water, provides for bean milk and adds and the opportunity of stopping；

For the ozone reaction still 3 of oxidation reaction, ozone reaction still 3 includes the heat exchange coil being coiled in ozone reaction still 3 still body 301, the charging aperture 302 be located on ozone reaction still 3, reaction-ure inlet pipe 303, mixed gas outlet 304, ozone inlet tube 305, precipitum outlet 306 and scavenging solution outlet 307, the bottom of ozone reaction still 3 also is provided with precipitation still 1 identical The boiling plate of structure and gas distributing chamber, in order to make the clear liquid boiling in still, one end of heat exchange coil 301 is waste water inlet 3011, waste water inlet 3011 is connected with the outfan of sludge pump 6, changes so that the raw material in raw material reaction device 2 is pumped into by sewage pump 6 In hot coil 301, the other end of heat exchange coil 301 is wastewater outlet 3012, and wastewater outlet 3012 connects entering of precipitation still 1 Material pipe 106, so that raw material enters in precipitation still 1；Charging aperture 302 connects the clear liquid pipe 105 of precipitation still 1, in order to logical Entering the clear liquid from precipitation still 1, reaction-ure inlet pipe 303 is in order to add activated silicic acid, gaseous mixture in ozone reaction still 1 The air inlet pipe 1031 of body outlet 304 connection precipitation still 1, for being passed through mixed gas, ozone import in precipitation still 1 Pipe 305 connects ozonator 9, and in order to be passed through ozone in ozone reaction still 3, precipitum outlet 306 connects precipitation The feed pipe 106 of still 1, using the precipitum that produces in ozone reaction still 3 as sedimentation agent, various with in precipitation still 1 While heavy metal hydroxide generation co-precipitation, the hydroxide ion dissociated is made full use of, decrease in precipitum The usage amount of the additives such as flocculant, abundant utilizes material, and meanwhile, the backflow of precipitum can make the end in precipitation still 1 Stream sewage sludge coarse grain, makes electric charges different on mud band, accelerates the sedimentation of mud and the speed of separation；Scavenging solution outlet 307 arrival ends connecting cooler 7, in order to discharge the scavenging solution in ozone reaction still 3；

For the precipitation still 1 of coagulating sedimentation, the exhaustor 1031 connecting shaft flow type fan 4 of precipitation still 1, blow-off pipe 1032 connect pressure filter 5 by blowoff line, and precipitation still 1 expellant gas is drained to blowoff line by axial fan 4 In, i.e. exhaustor 1031 connects blowoff line by axial fan 4, in order to the mud in scavenging conduit, is providing dynamic for mud While power, prevent mud from blocking blow-off pipe 1032 because stickiness is big, it is ensured that equipment and system properly functioning；Filling pipe 104 For adding sodium chlorate and the mixed solution of activated silicic acid in precipitation still 1, former in order to process in precipitation still 1 Material；

For cooling down the cooler 7 of the scavenging solution that ozone reaction still 3 is discharged, cooler 7 carries out cooling process to scavenging solution, cooling The port of export of device 7 is connected with continuous drift sand filter tank 8, so that the scavenging solution after cooling is processed by drift sand filter tank 8 continuously processes, Eliminate hot waste water and discharge the impact that environment is caused；Scavenging solution after cooling process, in cooling procedure, the material dissolved Can separate out, such as the fraction Dissolvable Fe (OH) in scavenging solution₃, AL(OH)₃, Cr(OH)₃, Cd(OH)₃Deng hydroxide and BaSO₄In sulfate, these materials are less due to dissolubility own, and after solvent temperature reduces, its dissolubility also can drop therewith Low, i.e. separate out colloid, and, due to the reduction of temperature, the stickiness of the colloid of precipitation will increase, and the colloid in scavenging solution is with outstanding Buoyancy granule is more easy to mutually bond and forms the solid-liquor separation of bulky grain dough, beneficially later stage, and then makes scavenging solution obtain into one The purification of step, in scavenging solution, the content of heavy metal ion continues to be down to minimum, after separating through subsequent filter, the purification water of discharge Every leading indicator all can reach regulation requirement；

For filtering the continuous drift sand filter tank 8 of the scavenging solution discharged from cooler 7, continuous drift sand filter tank 8 will be analysed in scavenging solution The gel filtration gone out out, is purified water, purifies water and then can the most externally discharge；

For providing the ozonator 9 of ozone to ozone reaction still 3, ozonator 9 is made up of an ozone generation system, Ozone generation system includes that air compressor, air accumulator, filter, freezing type drier, absorption drier and ozone occur Device, to reach existing existing system, the purpose of material-taking on-site.

For filter pressing from the pressure filter 5 of the mud of precipitation still 1, pressure filter 5 processes from precipitation still 1 Mud also carries out filter pressing to mud, obtains filtrate and filter cake, and filtrate is by the feed pipe of filtrate (liquid end with precipitation still 1 106 connect, and again to process, filter cake is delivered to outward other processing equipments, after drying is dehydrated, send process outside.

As one embodiment with improvement, at cooler 7, it is provided with reflux pipe 10, i.e. the purification of ozone reaction still 3 Liquid outlet 307 is also associated with reflux pipe 10, and the other end of reflux pipe 10 connects the port of export of cooler 7, ozone reaction It is provided with opening and closing valve 11 at the scavenging solution outlet 307 of still 3, at the arrival end of cooler 7, also is provided with opening and closing valve 11, return duct The one end on road 10 is connected to the opening and closing valve 11 at the arrival end of the opening and closing valve 11 at scavenging solution outlet 307 and cooler 7 Between, the other end of reflux pipe 10 is provided with stop valve 1001.

As a kind of preferred implementation, reflux pipe 10 being additionally provided with pressure relief valve 1002, it is at reflux pipe 10 Interior pressure is automatically releasable when being in more than the pressure of regulation, to adjust the pressure in reflux pipe 10, prevents from carrying scavenging solution Enter the overload of the loine pressure in cooler 7 and break down.When the parameters of scavenging solution is after processing through ozone reaction still 3 Reach pre-provisioning request, then need not again it be carried out cooling process, can directly close the opening and closing valve at cooler 7 arrival end 11, allow clear liquid be fed directly to continuous drift sand filter tank 8 via reflux pipe 10, with adjusting process flow process adaptively, save money Source.

Furthermore, present invention includes a kind of process technique containing heavy metal metallurgy waste water, as shown in figure 13, Comprise the following steps:

Step 1, the waste water containing heavy metal metallurgy first a part just produced pumps in precipitation still 1, gives up containing heavy metal metallurgy After water staticly settles in precipitation still 1, open clear liquid pipe 105, the clear liquid in precipitation still 1 is entered ozone reaction still In 3；

Step 2, the waste water containing heavy metal metallurgy just produced is pumped in raw material reaction device 2, open the air vent of raw material reaction device 2 203, observe pan feeding situation by manhole, after the waste water containing heavy metal metallurgy reaches set amount, closedown material inlet 202, now, Measure the temperature containing heavy metal metallurgy waste water continuous observation variations in temperature with temperature gauge, treat the temperature that temperature gauge shows When degree drops to 80-90 DEG C, open additive import 204, added in raw material reaction device 2 by additive import 204 and make Bean milk (Baume degrees is 20.0), the addition of bean milk is 3-5wt%, limit add become stirring 5-15min；

After step 3, step 2 complete, close additive import 204, open material outlet 202, heavy metal will be contained by sewage pump 6 Metallurgical Waste Water carries out heat exchange in pumping into the heat exchange coil 301 of ozone reaction still 3, open the feed pipe 106 of precipitation still 1, contain Heavy metal metallurgy waste water pumps in precipitation still 1, until it reaches after set amount, closes material outlet 202；

Step 4, clear liquid from precipitation still 1 enter after ozone reaction still 3, start ozonator 9 to produce ozone, open Opening ozone inlet tube 305 and the mixed gas outlet 304 of ozone reaction still 3, ozone ventilation is 8mg/L, gas distributing chamber Operating air pressure is that 30000-50000Pa(is preferably 35000Pa, it is possible to suitably select gas according to the clear liquid amount in ozone reaction still 3 Pressure), and in ozone reaction still 3, add activated silicic acid, the wherein Baume degrees of activated silicic acid by reaction-ure inlet pipe 303 simultaneously Being 39.0, addition is 0.7wt%；

After step 5, step 4 complete, by air pump by the mixed gas from ozone reaction still 3 with from raw material reaction device 2 Waste gas pumps in precipitation still 1, and the operating air pressure of the gas distributing chamber in precipitation still 1 is that 60000-80000Pa(is preferred For 65000Pa, it is possible to suitably select air pressure according to the clear liquid amount in ozone reaction still 3)；

Step 6, entering after precipitation still 1 containing heavy metal metallurgy waste water from raw material reaction device 2, gas distributing chamber discharges Mixed gas carries out " boiling " process to containing heavy metal metallurgy waste water, drips sodium chlorate and activation in precipitation still 1 simultaneously The mixed solution of silicic acid, wherein the mass ratio of sodium chlorate and activated silicic acid is 1:2, and the concentration of mixed solution is about 65wt%, adds Entering amount is that 3-5wt%(selects, typically at about 3.5wt% in right amount according to the insoluble substance concentration containing heavy metal metallurgy waste water), Rate of addition is 80L/h, opens axial fan, is entered in blowoff line by the purification air pump in precipitation still；

After step 7, step 5 complete, adding sodium hydroxide in ozone reaction still 3, in regulation still, the PH of waste water is between 8-9, Then standing sedimentation, is purified liquid and precipitate, and scavenging solution pumps in cooler 7, and precipitate pumps into precipitation through feed pipe 106 In reactor 1；

After step 8, step 6 complete, adding sodium hydroxide in precipitation still 1, in regulation still, the PH of waste water is between 8-9, Then standing sedimentation, obtains clear liquid and mud, and clear liquid pumps in ozone reaction still 3 after step 7 completes, and mud then pumps into filter pressing Filter pressing is carried out in machine 5；

Step 9, pressure filter 5 receive from the mud in precipitation still 1 and carry out filter pressing process, obtain filtrate and filter cake, filter Liquid is delivered in precipitation still 1 by transfer pipeline, and again to process, filter cake is delivered to outward other processing equipments；

Step 10, cooler 7 receive from the scavenging solution in ozone reaction still 3 and carry out cooling process, and liquid temp to be clean reaches After 5-10 DEG C, scavenging solution is arranged to continuous drift sand filter tank 8 by cooler 7, after continuous drift sand filter tank 8 is filtered, is purified water, Purified water connects externally discharge.

In step 1, first adding the waste water Han heavy metal metallurgy to precipitation still is to prevent precipitation still and smelly Oxygen reactor no-load running, it is to avoid device damage and economizing on resources.

In step 2, the cause adding bean milk in raw material reaction device is, utilizes salt salt manufacturing cleaning principle, Xiang Gao Adding containing the bean milk of a large amount of protein containing in heavy metal metallurgy waste water of temperature, make containing the calcium ion in heavy metal metallurgy waste water, Magnesium ion, heavy metal ion and other impurity and protein hybrid reaction form colloid and neutralize colloid that other materials are formed Electrically, make the colloid formed in waste water can solidify bonding formed bulk bulk colloid, so beneficially later stage to waste water at During reason, make originally to be difficult to mutually to bond mutually bonds sinking with identical electrical colloidal suspended substance, to realize preferably solid-liquid Separating, this method can remove most heavy metal ion in waste water, removes heavy metal ion for the later stage and provides advantage. Certainly, due to the special nature of protein, the temperature containing heavy metal metallurgy waste water is unsuitable too high, should control between 80-90 DEG C, High temperature is easily caused breaks down proteins and loses activity, and then significantly reduces the purification capacity of protein, and low temperature then causes protein Being not susceptible to reaction, activity reduces, falls flat.

In step 3, (temperature is substantially at 60-70 to utilize the preheating containing heavy metal metallurgy waste water that raw material reaction device discharges About DEG C), the clear liquid in ozone reaction still is heated, the purpose of heating is, when adding hydroxide to ozone reaction still During sodium, in clear liquid, form hydroxide colloid, to remove the heavy metal ion and other metal ions being dissolved in clear liquid, necessarily In temperature range, owing to hydroxide colloid is accelerated with the rising Brownian movement of solvent temperature, the collision of suspension colloidal solid is general Rate improves, and promotes bulk bulk colloid to be formed, and coordinates the effect of activated silicic acid flocculation aid, and then contributes to dividing of later stage solid-liquid From, through experimental observation, when the temperature of clear liquid rises to about 40 DEG C, the colloid that clear liquid separates out is mainly with macroscopic bulk shape Formula exists, and in clear liquid, the small particle content of suspension is few, illustrates that temperature is bigger on the volume impact of colloid in clear liquid.

In step 4, activated silicic acid is mainly as flocculation aid, it is possible to promote that colloid solidification is bonded together, Jin Erda To the purpose of remove impurity, being passed through of ozone be in can making clear liquid the metal ion of pressure steady statue become high-valence state metal from Son, is allowed to be easier to react with hydroxide ion form colloid, in order to precipitation, to remove Fe present in clear liquid²⁺As a example by, smelly Oxygen and Fe²⁺Oxidation reaction chemical equation be: O₃+ Fe²⁺→Fe³⁺+O₂, the Fe of generation³⁺Then can react with hydroxide ion Generate Fe(OH)₃, and then eliminate Fe²⁺.Owing to ozone is the shortest with the clear liquid haptoreaction time, will there is substantial amounts of ozone not React, after unreacted ozone mixes with the waste gas produced in ozone reaction still, the H contained in waste gas₂S、N_XO etc. have Evil gas is oxidized, and then has purified waste gas, but the amount of the harmful gas produced in ozone reaction still is less, still has suitable one The ozone unreacted (content is substantially at 30-40%) of part, in order to improve the utilization rate of ozone, can will discharge in ozone reaction still Mixed gas enter precipitation pond directly as ozone source in carry out oxidation processes.

In steps of 5, when utilizing unreacted ozone, in order to the ozone produced in raw material reaction device is carried out at purification Reason, together can pump into the waste gas in raw material reaction device in precipitation still with the mixed gas in ozone reaction still, then to heavy While shallow lake reactor provides ozone source, the waste gas in raw material reaction device is carried out purified treatment, further, since precipitation still The air pressure needed is big compared with the air pressure that ozone reaction still needs, and the waste gas in raw material reaction device can supplement the deficiency of air pressure.Gaseous mixture Waste gas in body and raw material reaction device enters in precipitation still jointly, after ozone oxidation consumes, in ascension to precipitation still After Shang Fang, remain unreacted ozone through in precipitation still purifier stop after, depleted by waste gas, further It is discharged outside precipitation still, while taking full advantage of ozone, the waste gas produced in wastewater treatment process is carried out fully Deodorization processes, and makes the discharge of waste gas also can be up to state standards.

In step 6, as the addition of sodium chlorate is with the effect of ozone, primarily to make the metal ion of lower valency become Metal ion for high-valence state, in order to remove impurity, to make the metal ion complete oxidation of waste water state at a middle or low price further, or with Fe²⁺As a example by (Metallurgical Waste Water of iron and steel mainly contains iron metal ion), sodium chlorate and Fe²⁺Reaction mechanism be: 2FeCl₂+ NaClO+2HCl=2FeCl₃+NaCl+H₂O, coordinates the effect of activated silicic acid, the Fe of generation³⁺Generation Fe is reacted with hydroxide ion (OH)₃Colloid, and then eliminate Fe²⁺.Heavy metal-containing waste water after precipitation still processes, in its mud obtained, solid Content ratio reaches about 30%, and remove impurity and flocculation deposition effect are notable.

In step 10, reflux pipe can be set at cooler, i.e. the scavenging solution outlet of ozone reaction still is also associated with Reflux pipe, the other end of reflux pipe connects the port of export of cooler, is provided with out at the scavenging solution outlet of ozone reaction still Valve closing door, also is provided with opening and closing valve at the arrival end of cooler, one end of reflux pipe is connected to opening at scavenging solution outlet Between opening and closing valve at the arrival end of valve closing door and cooler, the other end of reflux pipe is provided with stop valve, on reflux pipe Being additionally provided with pressure relief valve, its pressure in reflux pipe is automatically releasable when being in more than the pressure of regulation.

First scavenging solution is carried out water examination, when needs carry out further purified treatment and cooling processes to scavenging solution Time, open the opening and closing valve opening at the arrival end of the opening and closing valve at scavenging solution outlet and cooler, scavenging solution flows into cold But, in device, cooled device cooling enters in continuous drift sand filter tank after processing, it is achieved again purifying, scavenging solution is being delivered to cooler During, owing to chiller treatment amount is less, processing speed is relatively slow, if the scavenging solution amount of pumping into is bigger, in scavenging solution pipeline Pressure increase, occur that pipeline transships, due to the existence of reflux pipe, when the pressure set points of the non-pressure relief valve of overload pressure Time, reflux pipe is not turned on, and when the pressure set points of overload pressure overpressure relief valve, reflux pipe turns on, the most completely The scavenging solution that cooling processes is when being delivered to continuous drift sand filter tank, and pressure relief valve is that pressure release makes a part of scavenging solution through backflow Pipeline is back to the arrival end of cooler and again carries out cooling process, stabilizes the pressure in scavenging solution transfer pipeline, prevents Conveying scavenging solution enters the loine pressure overload in cooler and breaks down, it is ensured that the properly functioning and cooling of equipment processes Effect；When need not again scavenging solution be carried out purified treatment and cooling process, open the opening and closing valve at scavenging solution outlet With the stop valve of reflux pipe, and simultaneously close off the opening and closing valve at the arrival end of cooler, treat that the pressure in reflux pipe surpasses During the setting value of excess pressure relief valve, reflux pipe turns on, and scavenging solution is fed directly to continuous drift sand filter tank along reflux pipe, with Adjusting process flow process adaptively, economizes on resources.

The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.

Claims

1. the processing system containing heavy metal metallurgy waste water, including:

It is characterized in that, material outlet connects waste water inlet by sewage pump, and air vent connects air inlet pipe, and charging aperture connects clear liquid Pipe, mixed gas outlet connects air inlet pipe, and ozone inlet tube connects ozonator, and precipitum outlet connects feed pipe, only Changing liquid outlet and connect cooler, wastewater outlet connects feed pipe, and blow-off pipe connects pressure filter by blowoff line, and exhaustor leads to Cross axial fan and connect blowoff line.

2. the processing system containing heavy metal metallurgy waste water as claimed in claim 1, it is characterised in that cooler connects stream continuously Sand filter.

3. the processing system containing heavy metal metallurgy waste water as claimed in claim 1 or 2, it is characterised in that scavenging solution outlet Place is provided with opening and closing valve and connection has reflux pipe, also is provided with opening and closing valve at the arrival end of cooler, one end of reflux pipe It is connected between the opening and closing valve at the arrival end of the opening and closing valve at scavenging solution outlet and cooler, another of reflux pipe End connects the port of export of cooler and is provided with stop valve.

4. the processing system containing heavy metal metallurgy waste water as claimed in claim 3, it is characterised in that be additionally provided with on reflux pipe Pressure relief valve, pressure relief valve's pressure in reflux pipe is automatically releasable when being in more than the pressure of regulation.

5. the processing system containing heavy metal metallurgy waste water as claimed in claim 1 or 2, it is characterised in that the filtrate of pressure filter The port of export connects feed pipe.

6. the processing system containing heavy metal metallurgy waste water as claimed in claim 1 or 2, it is characterised in that precipitation still bag Include cavity, inside cavity be arranged over purifier, purifier is fixedly installed between feed pipe and exhaustor, purify dress Putting and include shutter board and labyrinth type swash plate, shutter board is located at the top of labyrinth type swash plate.

7. the processing system containing heavy metal metallurgy waste water as claimed in claim 6, it is characterised in that blow-off pipe and air inlet pipe set On the low head of cavity lower end, the bottom of cavity is provided with boiling device, and described boiling device includes boiling plate, on boiling plate all Being furnished with some pores, the middle part perforate of boiling plate is also connected with blow-off pipe, and cavity discharges material by blow-off pipe, boiling Plate, blow-off pipe and low head are formed to seal against each other to connect and form gas distributing chamber, and gas is passed through in gas distributing chamber by air inlet pipe.